{
"sae_256": "White King on e1, attacked by at least one black piece, and defended by at least one white piece.",
"sae_43": "A square on the 7th rank is attacked by at least one black piece and not attacked by any white pieces.",
"sae_119": "An empty square on the 7th rank (for white) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_10": "White pieces attacking the d1 square.",
"sae_251": "A white pawn on the 2nd or 3rd rank is attacked by one black piece and defended by at least one white piece.",
"sae_234": "White piece attacks a black pawn on the 6th or 7th rank, which is also attacked by a black piece.",
"sae_245": "The feature detects empty squares on the first rank that are not attacked by white pieces and are near the white king.",
"sae_0": "A queen is attacked by one piece and defended by one piece, with the attacking piece being a queen.",
"sae_176": "White pawn on a2, attacked by white pieces, with no black attackers.",
"sae_255": "White's rook is attacked by a black rook on the same rank or file, with the black rook being the only or primary attacker.",
"sae_267": "Black pawn on e7/d7 attacked by 3+ black pieces, with no white attackers.",
"sae_50": "White's king's bishop on f1/c1, attacked by at least two white pieces and zero black pieces.",
"sae_185": "The feature activates when a square is attacked by at least one black piece, and not attacked by any white pieces.",
"sae_272": "A square is attacked by a white pawn and a black pawn, with the white king nearby.",
"sae_84": "The feature detects an undefended empty square on the 7th rank (c7 or f7) that is attacked by at least one black piece.",
"sae_187": "Black bishop actively placed on a long diagonal or edge file, contributing to a mating attack.",
"sae_35": "White back-rank configuration with empty f1 attacked by multiple white pieces, typically with king on e1 or g1 and uncastled rooks.",
"sae_161": "A knight on the target square, not attacked by either side, and the king of the side to move is within 2 squares of the knight.",
"sae_159": "Detects squares on the 7th rank (for white) that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_58": "The feature detects squares on the first rank that are attacked by both sides, especially when the attacking white piece is a rook.",
"sae_124": "Black king on the back rank (d8, e8, or f8) is attacked by exactly one black piece.",
"sae_106": "White attacks an empty square on the 5th or 6th rank with two pieces, while Black attacks it with fewer pieces.",
"sae_158": "The feature detects squares on the first rank that are attacked by at least two white pieces and at most one black piece, with the target square being empty.",
"sae_182": "An empty square on the 7th rank (for white) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_164": "A square on the 7th rank (for white) or 2nd rank (for black) that is attacked by at least one enemy piece and not attacked by any friendly pieces.",
"sae_153": "Detects squares on the 6th rank (for white) or 3rd rank (for black) that are attacked by at least one enemy piece and not attacked by any friendly pieces.",
"sae_188": "A pawn on the 7th rank (from the pushing side's perspective), on the a- or h-file, with few opposing attackers.",
"sae_27": "White attacks a black knight on a central square with two pieces, while Black defends it with one or two pieces.",
"sae_252": "Detects squares on the 5th or 6th rank that are attacked by at least two white pieces and zero or one black pieces.",
"sae_160": "Detects an active knight (either colour) near the centre or enemy king, participating in a mating attack, with at most one enemy attacker.",
"sae_24": "The target square b2 is attacked by a black bishop on a3, c4, or d4, or a black rook on b8.",
"sae_126": "White king is near the black king, which is on the 6th or 7th rank, with no immediate attacks on the black king.",
"sae_116": "Moving piece lands on an empty square adjacent or near a friendly pawn, across various ranks.",
"sae_174": "The feature detects a pawn on the 7th rank (a7 or h7) that is attacked by an enemy pawn and defended by a friendly piece, or attacked by an enemy pawn and undefended.",
"sae_194": "White's king's rook on h1, with no white pieces on the f1-h3 diagonal, and no white pieces on the h-file except the rook itself.",
"sae_275": "Advanced or passed pawn in a bishop or pawn endgame, often a connected or outside passed pawn that creates decisive winning chances.",
"sae_34": "Black's king is castled kingside, and the target square is g8 or h8, which is either empty or occupied by a black rook, and is not attacked by white.",
"sae_70": "White pawn on h3 is attacked by a black piece, and white has no defenders or only one defender (which is not a pawn).",
"sae_178": "King on the back rank or second rank, with no friendly pieces defending it, and potentially under attack.",
"sae_222": "A knight on the 4th or 5th rank is attacked by two enemy pieces and defended by zero or one friendly piece.",
"sae_299": "Unprotected square on the first rank, attacked by multiple black pieces, with the white king nearby.",
"sae_316": "White king castled on g1 with nearby friendly pieces providing cover, in a position with no immediate black threats to the king.",
"sae_351": "Detects a piece (king, knight, or bishop) on a corner square (typically h1 or h8) in tactical positions, often connected to smothered mate or corner king motifs.",
"sae_398": "A black pawn on the 5th or 6th rank is attacked by at least two black pieces and zero white pieces.",
"sae_386": "White attacks h6, which is empty, and Black may or may not attack it.",
"sae_341": "White attacks a black bishop on an open square with a white bishop.",
"sae_416": "An empty square on the 7th rank that is attacked by exactly one black piece and not attacked by any white pieces.",
"sae_339": "White's rook on the 8th rank attacks an empty square, which is also attacked by a black piece.",
"sae_361": "Advanced passed pawn on the 6th or 7th rank close to promotion, where control of the queening square and piece activity are decisive.",
"sae_383": "The feature detects the f1 square being attacked by at least two white pieces, with no black attackers, and the white king is on e1.",
"sae_441": "Detects squares on the 7th rank that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_445": "White rook on the a-file, on rank 2 or 3, with white's king on the kingside.",
"sae_280": "The feature detects squares on the 7th rank that are attacked by at least one enemy piece and not attacked by any friendly pieces.",
"sae_346": "Black king on a7 or h7, with no white attackers, and at least one black pawn on the 7th rank.",
"sae_442": "Detects a corner file square (a- or h-file) targeted by a queen in a tactical middlegame combination, often a discovered attack or check.",
"sae_405": "A pawn on the 2nd, 3rd, 4th, or 5th rank that is attacked by at least two white pieces and not attacked by any black pieces.",
"sae_372": "White king on g1, attacked by two white pieces, with a white pawn on f2 and a white knight on f3.",
"sae_321": "A black bishop that is active or well-centralised in an endgame or middlegame, often serving as a key defensive or offensive piece near the opponent's structure.",
"sae_355": "Detects a knight posted on a central or near-central square (c3\u2013f5 region) that is under attack and defended, creating a tactical tension point in the position.",
"sae_557": "A square on the 7th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_421": "White's knight on d5 or e5 is attacked by one black piece and defended by at least one white piece.",
"sae_519": "Black's king is castled kingside, and the g8 square is attacked by at least two black pieces.",
"sae_580": "White attacks h2 with at least one piece, and h2 is empty.",
"sae_449": "Detects squares attacked by a black pawn that are not attacked by a white piece, especially when the square is adjacent to the white king.",
"sae_295": "The feature detects squares that are attacked by a white knight and are on the a-file or h-file, especially when the square is empty and not attacked by black.",
"sae_474": "White attacks a black pawn on the 7th rank with at least one piece, and black has no attackers on the pawn.",
"sae_452": "Detects a king on the back rank (1st or 8th) that is not attacked by the opponent.",
"sae_528": "The feature detects squares on the 7th rank (c7, d7, e7) that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_467": "Pawn endgame where the side to move must find the only defensive tempo to avoid zugzwang.",
"sae_553": "White attacks a black bishop on f3 or c3 with at least two pieces.",
"sae_531": "The feature detects a black pawn on g6, attacked by at least two black pieces, and not attacked by white.",
"sae_282": "White's rook on a1 is undefended and not attacked, and the b1 square is empty and attacked by at least two white pieces.",
"sae_508": "The feature detects the h8 square being attacked by a black piece, with no white attackers, and the white king is on the kingside.",
"sae_479": "White's king is on the back rank, and there is an empty square on the back rank next to the king that is attacked by at least one white piece.",
"sae_476": "The feature detects squares on the 3rd rank (for white) or 6th rank (for black) that are attacked by at least two friendly pieces and at most two enemy pieces, with a preference for squares on the b or g files.",
"sae_578": "Detects an undefended square on the 5th or 6th rank that is attacked by multiple black pieces and zero or one white pieces.",
"sae_630": "White's king is on g1 and h1 is attacked by a white rook.",
"sae_634": "White's king is castled kingside, and the h1 square is attacked by at least one white piece, with no black attackers.",
"sae_611": "A white bishop under attack by at least one black piece, with at least one white piece providing defence.",
"sae_664": "White King on e1 or g1, defended by multiple own pieces and not attacked by black, typically an uncastled or freshly castled king in the opening.",
"sae_681": "A black piece (bishop or queen) on an open central square attacked by multiple white pieces, with white holding an attacker advantage.",
"sae_598": "The king is on the back rank and is attacked by at least one enemy piece, with no friendly pieces defending it.",
"sae_695": "The feature detects a pawn on g2, attacked by a black piece, and defended by a white piece, often a king.",
"sae_728": "Detects squares on the 7th rank attacked by a single black piece, especially when the square is empty.",
"sae_767": "White attacks d5 with one piece, and Black attacks d5 with one or two pieces.",
"sae_702": "A white pawn on d4 or f4 is attacked by more black pieces than white pieces.",
"sae_700": "Detects a Queen on the 8th rank, with no pieces attacking it.",
"sae_861": "White pawn on the 5th rank, with no attackers from either side.",
"sae_705": "A pawn on the 2nd rank (from its side) is attacked by one friendly piece and one enemy piece.",
"sae_760": "White pawn on the 5th rank, attacked by black, with no white attackers.",
"sae_737": "White attacks a square on the 3rd rank with multiple pieces, especially a knight on f3/c3 and a bishop on d3/e2/c4/f4.",
"sae_748": "A black pawn on the 4th rank is attacked by a black piece and not attacked by a white piece.",
"sae_881": "White pawn on the 3rd or 4th rank, attacked by one black piece and defended by one or two white pieces.",
"sae_839": "Pawn on the 2nd rank (a2 or b2) that is undefended by the side to move.",
"sae_953": "White king on the back rank (e1\u2013g1 area) in a tactical position with active white pieces nearby.",
"sae_841": "The feature detects the g8 square being attacked by at least one black piece, with no white attackers, and the g8 square is empty.",
"sae_956": "A contested square on the 5th or 6th rank where both sides have attacking pressure, often the focal point of tactical tension.",
"sae_885": "White rook on the first rank is attacked by at least one white piece and not attacked by any black pieces.",
"sae_919": "A pawn on the 2nd rank (for the side to move) that is attacked by an enemy piece and defended by a friendly piece.",
"sae_814": "Target square is g8 or c8, attacked by multiple black pieces, with no white attackers.",
"sae_898": "The feature detects squares on the 7th rank (from white's perspective) that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_908": "Target square is undefended by white, attacked by black, and on the 7th rank.",
"sae_849": "White's knight on f6 (or d6) attacking g7 (or h7) where a black pawn is located, with no white pieces defending the pawn.",
"sae_936": "White pawn on the 2nd or 3rd rank, attacked by at least one white piece, and not attacked by any black pieces.",
"sae_821": "Detects squares on the 8th rank that are attacked by at least two black pieces, especially when the square is empty or occupied by a black rook.",
"sae_852": "Pawn on the 7th rank (any file) that is advanced or contested, often with promotion themes.",
"sae_788": "A square on the 4th, 5th, or 6th rank that is attacked by both sides, with the number of white attackers being equal to or one less than the number of black attackers.",
"sae_930": "The feature detects a black bishop on a1, especially when it is undefended and not attacked.",
"sae_960": "The feature detects squares on the 7th rank that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_903": "White's rooks attack an empty square on the 6th rank, with at least one rook on the 4th rank.",
"sae_942": "Black's queen or rook attacks h8, which is empty and not attacked by White.",
"sae_813": "Target square on the 7th rank is attacked by at least one black piece and not attacked by any white pieces.",
"sae_911": "King on or near the back rank in an endgame with active minor pieces and passed or advanced pawns.",
"sae_962": "White Knight on c3 attacked by one Black piece, defended by one White piece, with a White pawn on d4.",
"sae_799": "A white knight on e2, e3, or f3, attacked only by white pieces, and attacked by at least 3 white pieces.",
"sae_999": "White attacks a black rook on a central square (c3, d4, or e3).",
"sae_948": "Black bishop active near the opponent's back rank enabling a mating attack, typically as part of a double-bishop or back-rank mate.",
"sae_997": "A white knight on the 2nd or 3rd rank, attacked by at least two white pieces and no black pieces.",
"sae_988": "The feature detects a target square on the 7th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_969": "White attacks a black piece on the 7th or 8th rank, with at least one white attacker being a rook or queen.",
"sae_1044": "Active rook delivering or threatening a decisive mating attack in the endgame, often operating on an open file or rank in coordination with other pieces.",
"sae_984": "Black's king-side rook is on h8, and the g8 square is attacked by at least one black piece, with no white attackers.",
"sae_1003": "The feature detects squares on the 7th rank that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_1135": "The feature detects squares on the 7th rank that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_1097": "Black knight on d7 or e7 (7th rank) attacked by multiple black pieces and no white pieces.",
"sae_1100": "White king's castling square g1 is empty and attacked by at least one white piece.",
"sae_1042": "The feature detects a black knight on d4, d5, or f4 that is attacked by white and defended by black, especially when white has fewer attackers than black defenders.",
"sae_1116": "A square on the 7th rank is attacked by a black pawn and not attacked by any white pieces.",
"sae_1140": "Black's king is on the back rank, and the target square is an empty square on the back rank, attacked by at least two black pieces, and not attacked by any white pieces.",
"sae_1055": "A square on the 7th rank (for white) or 2nd rank (for black) that is attacked by at least one enemy piece and not attacked by any friendly pieces.",
"sae_1127": "White rook attacking a black pawn on the 7th rank, which is also attacked by a black piece.",
"sae_1069": "White pawn on f2/g2 attacked by black, defended by white, with white king on g1/h1.",
"sae_1182": "A white pawn on the 7th rank is attacked by one white piece and one black piece.",
"sae_1174": "Black rook on a8 or h8 in an uncastled or partially developed position, not yet engaged in the game.",
"sae_1161": "White pawn on the 4th rank being attacked by multiple black pieces, especially on the a or h file.",
"sae_1236": "White has a piece attacking g2, and g2 is either empty or occupied by a black piece.",
"sae_1183": "A piece on the target square is attacked by at least two enemy pieces and defended by zero friendly pieces.",
"sae_1027": "White pawn on a5 attacked by white, with no black attackers.",
"sae_1302": "A square attacked by 2 white pieces and 3 black pieces, with white to move.",
"sae_1298": "A square on the 7th rank is attacked by at least one black piece and not attacked by any white pieces.",
"sae_1049": "White bishop on the first two ranks, on a light square, with no attackers.",
"sae_1338": "Black king on g8, not attacked by white, and potentially attacked by black pieces.",
"sae_1122": "White rook or queen attacks a black piece on the 7th or 8th rank, with at least one black defender.",
"sae_1331": "A white piece on a central square is under tactical pressure in a middlegame with active queens and minor pieces.",
"sae_1316": "Target square on 7th rank is attacked by at least one black piece and not attacked by any white piece.",
"sae_1354": "A black knight active in enemy territory, often participating in a mating combination or fork.",
"sae_1312": "A white pawn on the 6th rank is attacked by a black pawn and defended by a white pawn.",
"sae_1287": "Endgame positions where the side to move has a decisive tactical resource, often involving a piece sacrifice or back-rank threat.",
"sae_1353": "The feature detects a white bishop on the a1-h8 diagonal attacking a square on the 7th rank, with the target square being attacked by at least one black piece.",
"sae_1381": "White King on the back rank, especially in a corner, with few or no white attackers on it.",
"sae_1370": "Detects a white rook on the 3rd or 4th rank, especially when attacked by black pieces.",
"sae_1412": "Black king on the back rank (7th or 8th) with no black pawns on the 6th or 7th rank directly in front of it.",
"sae_1021": "White King on the 2nd or 3rd rank, with a White Bishop on the 4th rank, and a Black King on a8.",
"sae_1402": "White pawn on g2/h3 attacked by one black piece and defended by two white pieces.",
"sae_1398": "The king is on the 2nd or 3rd rank, attacked by a single enemy piece, and defended by at least one friendly piece.",
"sae_1406": "A white pawn on the 7th rank, with the target square being the square directly in front of it.",
"sae_1439": "The feature detects an empty central square (d4 or e4) that is equally attacked by both sides.",
"sae_1449": "Detects white king safely castled on the back rank (typically b1 or g1) in middlegame positions, surrounded by own pieces.",
"sae_1479": "Black king on the back rank, with a black piece (often a rook or bishop) on the target square, and the target square is attacked by a white piece.",
"sae_1452": "This feature detects a black bishop on a light square, often on the c5 or e5 squares, which is either undefended or attacked by an equal number of white pieces.",
"sae_1394": "Detects endgame positions with clear white dominance \u2014 active king, advanced passer, or superior minor piece \u2014 where the winning plan centres on queening.",
"sae_1477": "White pawn on h2, attacked by at least one white piece, and optionally attacked by black.",
"sae_1118": "An empty square on the 7th rank (for White) that is attacked by at least one Black piece and not attacked by any White pieces.",
"sae_1492": "This feature detects a pawn on the 7th rank that is not attacked by the opponent, especially when it is a passed pawn.",
"sae_1481": "Detects an undeveloped or passively placed black bishop defended by own pieces and unthreatened by white, typically in opening or early middlegame structures.",
"sae_1286": "White pawn on the 3rd or 4th rank, attacked by at least two white pieces and zero black pieces.",
"sae_1512": "A square on the 7th rank is attacked by at least one black piece and not attacked by any white pieces.",
"sae_1495": "A pawn (either colour) on the 2nd rank near the kingside, in a position involving mating threats or tactical pressure.",
"sae_1187": "King-and-pawn endgame with no pieces other than kings and pawns, frequently featuring zugzwang.",
"sae_1510": "White king on the first rank, with a white pawn on the second rank directly in front of it, and the target square is the square behind the pawn.",
"sae_1535": "A black pawn on g7 or h7 is attacked by exactly one black piece and zero white pieces.",
"sae_1529": "The feature detects a king on the 7th or 8th rank that is not attacked by white pieces.",
"sae_1386": "White's h7 square is undefended by white and attacked by at least one black piece, with the black king on g8 or h8.",
"sae_1263": "The feature detects squares on the 7th rank (for white to move) that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_1582": "The feature detects squares on the 7th rank that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_1546": "White Queen on c2 or d2, undefended by White, with no Black attackers.",
"sae_1566": "An undefended square on the 7th rank that is attacked by at least one black piece.",
"sae_1256": "Black control of a8, especially by a rook, with no white attackers.",
"sae_1537": "The feature detects a black pawn on the 5th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_1258": "The feature detects squares on the 7th rank that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_1590": "The feature detects a black pawn on the 6th rank that is attacked by at least one black piece and is not attacked by any white pieces.",
"sae_1211": "White piece attacks a black piece on the 8th rank, and the black piece is also attacked by at least one other black piece.",
"sae_1563": "White pawn on the second rank (a2, g2, or h2) that is attacked by at least one white piece and at most one black piece.",
"sae_1573": "A pawn on the 7th rank (b7 or g7) is attacked by at least one black piece and not attacked by any white pieces.",
"sae_1054": "Pawn on the 3rd or 4th rank (from its side) that is undefended by its own side and attacked by the opponent.",
"sae_1578": "Detects a black bishop on d7, with no white attackers, and a white pawn on d4.",
"sae_1596": "White pawn on the 3rd rank (c3, d3, e3, f3) attacked by at least 2 white pieces and 0 black pieces.",
"sae_1632": "White pawn on 7th rank, attacked by white, undefended by black, with white king nearby.",
"sae_1301": "White pawn on g3 (or b3) attacked by white pieces and not attacked by black pieces.",
"sae_1615": "The feature detects a Knight on b1, attacked by at least one black piece, and defended by at least one white piece.",
"sae_1625": "The target square g8 is attacked by at least two black pieces, and no white pieces.",
"sae_1634": "Black king on h7 or h8, with no white attackers on the target square, and at least one black piece on the 7th or 8th rank.",
"sae_1652": "Detects a black rook on f8, attacked by black pieces, with no white attackers.",
"sae_1294": "A queen that is lightly attacked (0-1 enemy attackers) and defended by at least one friendly piece.",
"sae_1602": "Detects the back rank (rank 1 or 8) being attacked by an enemy piece, especially when the king is on the back rank and there are no friendly pieces on the target square.",
"sae_1597": "The feature detects squares on the 8th rank that are attacked by at least two black pieces, especially g8.",
"sae_1658": "White attacks a black pawn on g6, which is defended by at least two black pieces.",
"sae_1621": "White's King's Rook is on h1, and there are no pieces on the g1-g2 squares, suggesting an open g-file or potential for a King-side attack/defense.",
"sae_1643": "A black rook under pressure from white pieces in an endgame or tactical position, often but not exclusively on high ranks.",
"sae_1504": "White attacks a black knight on a corner square (a1 or h1) with at least one white piece.",
"sae_1636": "Contested or passed pawn in an endgame where pawn structure determines the outcome.",
"sae_1647": "The feature detects empty squares on the 7th or 8th rank attacked by at least one white rook, especially when the square is on the a, b, or c file.",
"sae_1684": "A black passed pawn on the 5th or 6th rank in a rook or pawn endgame.",
"sae_1672": "White king on e1 or f1, with g1 being an empty square attacked by white pieces, and no black attackers on g1.",
"sae_1675": "The feature detects an undefended square on the 7th rank, attacked by at least one black piece, with white to move.",
"sae_1710": "Pawn on the 2nd rank (for white) or 7th rank (for black) that is not attacked by any piece.",
"sae_1702": "White pieces attacking a black piece on a central square (d5, c5, f5, e4) that is not defended or is under-defended by black.",
"sae_1755": "King on a corner square (a1 or a8) with 0 or 1 white attackers and 0 black attackers.",
"sae_1746": "Target square is g8 and is attacked by at least two black pieces, with no white attackers.",
"sae_1742": "Detects empty corner squares (a1, h1, a8, h8) that are not attacked by either side.",
"sae_1758": "The feature detects the f8 square being attacked by multiple black pieces, with no white defenders, often with the black king on e8.",
"sae_1756": "A black pawn on the 7th rank, with no white attackers and at least one black attacker.",
"sae_1767": "White Queen on d1 (or Rook on f1) is attacked by multiple white pieces, with no black attackers.",
"sae_1791": "White rook on the back rank, attacking an empty square on the back rank.",
"sae_1833": "White pawn on e5, attacked by 2-3 black pieces, and defended by 2-3 white pieces.",
"sae_1808": "Detects a king on the back rank, with no pieces on the rank behind it.",
"sae_1761": "The feature detects the h4 square being undefended by White, with Black having at least one attacker on h4, and the White King being castled kingside.",
"sae_1874": "The feature detects the squares g8 and h8, especially when they are empty or occupied by a rook, and are not attacked by white pieces.",
"sae_1856": "A black bishop defended by at least one black piece, not attacked by white, on any square.",
"sae_1869": "A white piece attacks a black pawn on g7 or h7, and the pawn is defended by exactly one black piece.",
"sae_1889": "The feature detects squares on the 7th rank (h7 or g7) that are attacked by at least one black piece and are not attacked by any white pieces.",
"sae_1879": "The feature detects squares on the 2nd or 3rd rank that are attacked by white pawns and are either undefended or defended by a single black piece.",
"sae_1774": "An uncastled rook on the back rank that retains castling rights, with no immediate threats targeting it.",
"sae_1882": "A square in the central pawn structure attacked by Black with no White defenders, often a weak pawn or outpost.",
"sae_1909": "A white pawn advanced to the 5th or 6th rank that is attacked by two or more black pieces and is a focal point of the position's tension.",
"sae_1867": "This feature detects a white bishop on the first rank, attacked by white pieces and not attacked by black pieces.",
"sae_1915": "Detects a queen on the 3rd or 4th rank, especially when attacked by an equal number of pieces from both sides.",
"sae_1900": "White attacks a Black rook on an open file/rank, with at least two attackers and often no Black defenders.",
"sae_1777": "Black king on e8 is attacked by at least one black piece.",
"sae_1906": "A pawn on f3/f6 or h3/h6, with an empty g4/g5 square, and no enemy pawn on g-file.",
"sae_1950": "A white pawn on d4/e4/c4 is attacked by two black pieces and defended by one white piece.",
"sae_1948": "White Queen on its starting square (rank 1) is attacked by at least one black piece.",
"sae_1935": "White attacks a black bishop on a central square (d2, d3, d5, f3) with at least 2 pieces, and black has no attackers on the bishop.",
"sae_1804": "White rook on d1/e1, attacked by at least two white pieces, with no black attackers.",
"sae_1938": "White's king's bishop is on its starting square (f1 or c1) and is attacked by at least one white piece, with no black attackers.",
"sae_1849": "Black queen on the back rank (7th or 8th) attacked by white.",
"sae_1951": "A black knight on the 2nd or 3rd rank, with no white attackers, and a white king nearby.",
"sae_1838": "White King on the h-file, with no white attackers on the King.",
"sae_1995": "A pawn on the 4th or 5th rank that is attacked by two pieces from both sides.",
"sae_1967": "White has multiple pieces attacking f1, which is empty, and the white king is not on e1.",
"sae_1813": "White pawn on d5, attacked by Black, and defended by White.",
"sae_2011": "White Queen on d1 is attacked by at least one Black piece and defended by at least two White pieces.",
"sae_2016": "Active bishop (either colour) in an endgame with back-rank mating threats or promotion pressure.",
"sae_1966": "A pawn on the 4th rank (a4 or h4) that is attacked by an enemy pawn and defended by a friendly pawn.",
"sae_2007": "White has two attackers on an empty square in the opponent's back rank, with the opponent's king on the back rank.",
"sae_2002": "A well-supported white knight on an outpost square that is contested by black.",
"sae_2026": "The feature detects empty squares on the 7th rank that are attacked by a pawn on the 6th rank, with the enemy king nearby.",
"sae_2027": "White rook attacks a pawn on the 2nd rank, which is also attacked by a black piece.",
"sae_1844": "White attacks a black bishop on d5, c6, or b5 with two pieces, while black attacks it with zero or one piece.",
"sae_1863": "Black kingside pawn cluster sheltering the king, not under immediate white attack.",
"sae_2034": "White King on the 7th rank, attacked by a white piece, with no black attackers.",
"sae_2047": "A white pawn is attacked by at least two black pieces and defended by zero white pieces.",
"sae_2050": "The feature detects a pawn on the 5th rank that is either attacked by the opponent or not attacked by the side to move.",
"sae_1805": "White bishop on b7, c6, d5, e4, f3, g2, or h1 attacking h8, with a black king on d4, d5, or d6, and a black pawn on c5.",
"sae_1997": "White's pawn on e4 attacks f2, which is undefended by Black, and White has no other pieces attacking f2.",
"sae_2036": "The feature detects a white pawn on the 2nd rank being attacked by a black piece, with white having exactly one attacker on the pawn.",
"sae_2045": "A square on the 4th or 5th rank is attacked by one white piece and one black piece, or is an empty square on the 4th rank with no attackers.",
"sae_1723": "Active white rook controlling open files or ranks in an endgame, often alongside a second rook.",
"sae_2049": "King actively centralised in a late endgame (pawn or minor piece), not constrained to a specific rank or file.",
"sae_2029": "White's king is castled kingside, and the f1 square is attacked by at least two white pieces, with no black attackers.",
"sae_1952": "White King on the back rank or 7th rank, with no white pieces defending it.",
"sae_2074": "Detects squares on the 8th rank that are attacked by no white pieces and are not occupied by a white piece.",
"sae_1897": "The feature detects squares on the 7th rank that are attacked by at least one enemy piece and not attacked by any friendly pieces.",
"sae_2078": "White King on e1, attacked by 2-4 white pieces, with no black attackers.",
"sae_2075": "The feature detects a king on the 5th rank with a friendly pawn on the 6th rank, and the target square is on the 4th rank, two squares away from the king.",
"sae_2076": "A king on the back rank exposed to at least one enemy attacker with no friendly piece directly defending the king's square.",
"sae_2083": "Detects a pawn on f2/g2 (or f7/g7 in mirrored positions) that is under attack by a long-range enemy piece and defended by the king, in a tactical middlegame.",
"sae_1931": "Detects black kingside pawn structure with a protected pawn on h7 (or equivalent 7th-rank edge pawn) shielding a castled king.",
"sae_2077": "White Queen on d1, attacked by white pieces, not attacked by black pieces.",
"sae_2086": "The feature detects squares on the 7th rank that are attacked by multiple black pieces and not attacked by any white pieces.",
"sae_1739": "Detects a middlegame or endgame position with mutual pawn tension and active piece pressure, often involving a contested pawn chain on both sides.",
"sae_2114": "Black rook on a8, attacked by black pieces, with no white attackers.",
"sae_2125": "Black king on g8 or h8, with the g8 square attacked by a black piece.",
"sae_2099": "A square on the 7th rank (for white) or 2nd rank (for black) that is attacked by at least one enemy piece and not attacked by any friendly pieces.",
"sae_2121": "A white bishop on the first rank is attacked by at least one black piece and defended by exactly one white piece.",
"sae_1930": "White pawn on f4 or h4, attacking g5, with no black pieces on g5.",
"sae_2149": "Black's f8 square is attacked by at least two black pieces, and not attacked by any white pieces.",
"sae_2158": "White Knight on b1, attacked by at least one White piece, with no Black attackers.",
"sae_2119": "Advanced passed pawn threatening promotion in an endgame, where the race to queen and piece coordination around the queening square are decisive.",
"sae_2112": "The feature detects a white piece (knight or bishop) on a central square (d5 or e4/e5) that is attacked by white pieces and not attacked or minimally attacked by black pieces.",
"sae_2164": "Detects an active black bishop in an endgame, typically on a central or semi-central diagonal, with minimal opposition pressure.",
"sae_2110": "White pawn on the 4th rank (h4, b4, a5, g2, h3) attacked by a black piece, with white having 0 or 1 defender.",
"sae_2188": "Pawn endgame with king opposition where a central or passed pawn structure determines the outcome.",
"sae_2197": "A black knight on a corner square (a8 or h8) that is not attacked by white pieces.",
"sae_2227": "King on target square attacked by one enemy piece, with no friendly defenders.",
"sae_2236": "The feature detects squares on the 2nd rank that are attacked by an enemy piece and are not defended by a friendly piece.",
"sae_2217": "White attacks a black pawn on d4/d5 with 1-3 pieces, while Black defends it with 2 pieces.",
"sae_2207": "The feature detects a target square on the 7th rank that is attacked by White and defended by at least two Black pieces, with the target square being empty.",
"sae_2132": "Detects squares on the 7th or 8th rank that are heavily attacked by black pieces and undefended by white.",
"sae_2218": "White pawn on h2 attacked by at least two white pieces and zero black pieces.",
"sae_2204": "An undefended white knight is under attack by a black piece, creating a tactical weakness that drives the solution.",
"sae_2234": "A queen actively placed on an open rank or file relative to the enemy king, creating tactical pressure.",
"sae_2225": "A pawn on the 6th rank (for White) or 3rd rank (for Black) that is attacked by an enemy pawn and defended by a friendly pawn.",
"sae_2244": "The feature detects the h7 square being attacked by at least one white piece and at least one black piece, with no piece currently on h7.",
"sae_2243": "Knight in a tactically active role \u2014 fork threat, trapped piece, or delivering/supporting a mating pattern.",
"sae_2276": "White pawn on the 3rd rank, not attacked by black, often with a white piece behind it.",
"sae_2300": "The feature detects squares on the back rank (7th or 8th) that are attacked by at least two black pieces, especially when the target square is g8 or h8.",
"sae_2255": "Rook actively placed in a mating or forcing configuration, often participating in deflection, Pillsbury-style mates, or discovered attacks.",
"sae_2305": "The feature detects an undefended empty square on the 7th rank that is attacked by at least one black piece.",
"sae_2313": "The feature detects squares on the 8th rank that are attacked by at least two black pieces and at most one white piece, with the king on the 8th rank.",
"sae_2319": "The feature detects the h7 square being attacked by at least one black piece, with or without white defenders.",
"sae_1993": "A pawn on the 4th rank (for White) or 5th rank (for Black) that is attacked by at least two enemy pieces and defended by fewer friendly pieces.",
"sae_2314": "White bishop on f7/e7/h7 attacked by 0-1 black pieces, with at least one white attacker.",
"sae_2364": "White's f2 pawn is attacked by 0 black pieces and defended by 2 white pieces (usually the king and a knight/bishop).",
"sae_2369": "Black queen on the back rank flanked by two friendly rooks, with no white piece attacking her square.",
"sae_2367": "The feature detects the g7 square being attacked by a black piece, especially when it's occupied by the black king or is an empty square.",
"sae_2324": "A white queen on d2 or e2 that is undefended or insufficiently guarded and is about to be captured by a black knight.",
"sae_2366": "The feature detects the h6 square being attacked by a black piece, often a knight or bishop, and sometimes defended by a white piece.",
"sae_2382": "The feature detects a pawn on the target square that is attacked by at least one black piece and defended by at least two white pieces.",
"sae_2374": "The opponent's king is on the back rank or second-to-back rank, and there are no white pieces attacking it.",
"sae_2386": "The feature detects a pawn on the 7th rank (e7 or c7) that is either undefended or defended by one piece and attacked by one piece.",
"sae_2393": "A square on the 7th rank (or 2nd rank for Black) that is attacked by at least one enemy piece and not attacked by any friendly pieces.",
"sae_2400": "White King on e1, attacked by 1-3 white pieces, and 0 black pieces.",
"sae_2312": "White pawn on the 4th rank (or 5th rank for black) being attacked by at least one black piece, with no white attackers.",
"sae_2353": "Black king on its original square (e8 or g8) is attacked by at least one black piece, with no white attackers.",
"sae_2409": "White's rook on the 3rd rank attacks a black pawn on the 7th rank, with the black king on the 8th rank.",
"sae_2423": "White king on e1 with h1-rook intact, poised to castle kingside, or already castled to g1.",
"sae_2422": "The feature detects a pawn on b7 or g7 that is undefended by black pieces and not attacked by white pieces, with the white king on the kingside.",
"sae_2398": "A square on the back rank (rank 8 for white, rank 1 for black) is attacked by multiple enemy pieces, and is not defended by any friendly pieces.",
"sae_2511": "White's knight on f3 attacks h3, which is also attacked by a black pawn on g4.",
"sae_2436": "White pawn on b2, target square a2, and no black pieces attacking a2.",
"sae_2446": "The feature detects an undefended a2 square, attacked by a black piece, with the white king on the back rank.",
"sae_2514": "A black knight on a corner square (a1 or h1) that is not attacked by black pieces.",
"sae_2542": "King on the back rank or edge of the board, attacked by an enemy piece.",
"sae_2540": "White's a1 rook is blocked by a white piece (usually a knight or bishop) on b1 or c1, preventing it from moving.",
"sae_2592": "A white rook is active on an open file or rank, threatening or delivering a decisive back-rank or checking move.",
"sae_2599": "White's king is castled kingside, and the h1 square is attacked by a white rook.",
"sae_2603": "The feature detects a white knight on d4, d5, or e5, which is attacked by at least one black piece and defended by at least two white pieces.",
"sae_2614": "Detects a pawn on the 4th or 5th rank that is attacked by at least two enemy pieces and defended by zero friendly pieces.",
"sae_2630": "White King on g1, attacked by at least one white piece, with no black attackers.",
"sae_2628": "White King on a1, attacked by a White Rook on the a-file, with no Black attackers on a1.",
"sae_2559": "White knight on b1 or g1, attacked by 0-1 black pieces, and defended by 2-3 white pieces.",
"sae_2412": "White pieces are attacking a black bishop on the 2nd or 3rd rank, with no black attackers on the bishop.",
"sae_2616": "A square on the 7th rank (for white) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_2605": "King on or near the back rank in an exposed position, often with threats of back rank mate or geometric mating patterns.",
"sae_2646": "White's pawn on h6 is attacked by no black pieces and defended by two white pieces, with a white queen or rook on the h-file.",
"sae_2710": "A white pawn on the 2nd rank is attacked by exactly one white piece and no black pieces.",
"sae_2707": "A square on the 3rd or 4th rank (from white's perspective) that is attacked by two black pieces and one white piece.",
"sae_2665": "King on the back rank, attacked by one black piece and defended by one or two white pieces.",
"sae_2669": "The white king is castled kingside, and the g7 square is undefended by white pieces, with the black king on g7.",
"sae_2631": "Detects kings in near-opposition or close proximity in simplified endgames (pawn, rook, or minor piece endings).",
"sae_2704": "Detects a king on the back rank (rank 1 or 8) with no friendly pieces defending it and no enemy pieces attacking it.",
"sae_2717": "White pawn on a-file, on rank 5 or 6, with no white attackers and 0-1 black attackers.",
"sae_2744": "Pawn on the 4th rank, attacked by 0 white pieces, and 0 or 1 black pieces.",
"sae_2773": "White King is adjacent to the Black King, with the Black King on the target square.",
"sae_2769": "Active king in a king-and-pawn endgame, often on the 3rd\u20135th rank with adjacent pawns, across a variety of endgame structures.",
"sae_2759": "White queen attacks a square on the back rank, with no black pieces attacking that square.",
"sae_2774": "White's king's rook is on h1, and the g1 square is empty, allowing for castling or a king move.",
"sae_2776": "White's pawn on d2/d3/d4 is attacked by a black pawn on e4/c4, and white has a pawn on e2/e3/c2/c3.",
"sae_2792": "Detects a king (either colour) cornered on the back rank in a mating-net position, typically on the a-file or queenside corner, with escape squares controlled by the opponent.",
"sae_2782": "Black knight on b8 attacked by at least one black piece, with no white attackers.",
"sae_2803": "White is attacking a black pawn on the 7th rank (b7, c7, f7, a7) that is defended by at least 2 black pieces, with no white attackers.",
"sae_2796": "A pawn on the 3rd, 4th, or 5th rank that is attacked by at least two white pieces and attacked by at most one black piece.",
"sae_2846": "Black bishop on f8 attacked by at least two black pieces, with no white attackers.",
"sae_2860": "King on rank 2 or 7 in a simplified endgame, often with passed pawns or mating threats nearby.",
"sae_2804": "The feature detects a pawn on the 7th rank (a7 or h7) that is not attacked by white pieces, with the white king nearby.",
"sae_2850": "The feature detects squares on the 7th rank (for white) that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_2857": "An advanced pawn (5th rank or beyond) for either side that is not directly attacked by an opponent's piece.",
"sae_2881": "Detects a pawn on the 4th, 5th, or 6th rank that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_2907": "Detects a knight on a contested square attacked by more enemy pieces than friendly pieces, regardless of specific square.",
"sae_2933": "A knight on a corner square (a1 or h1) that is not attacked by the opponent.",
"sae_2906": "Black king on h8 attacked by at least one black piece, with no white attackers.",
"sae_2935": "The target square is on the 8th rank, and there are no white pieces attacking it.",
"sae_2946": "The feature detects an undefended square on the 7th rank (c7 or f7) that is attacked by at least one black piece, with no white attackers.",
"sae_2937": "A white rook attacks a black pawn on the 7th rank (commonly g7 or h7) that has limited defensive support.",
"sae_2961": "Detects a black rook on its starting square (a8 or h8) with no white attackers.",
"sae_2964": "White attacks a black bishop on the 6th or 7th rank, with the bishop being defended by at least one piece.",
"sae_3020": "Rook defending a passed or advanced pawn in a rook endgame under enemy pressure.",
"sae_3003": "White King on the 5th or 6th rank, with a white pawn on an adjacent square.",
"sae_3030": "Detects empty squares attacked by multiple black pieces, with no white attackers.",
"sae_3028": "The feature detects squares on the 7th rank that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_3007": "A king is placed on a low rank (1st or 2nd) in an endgame, relatively safe from immediate attack, as both sides manoeuvre for a decisive pawn promotion or zugzwang.",
"sae_3033": "The feature detects empty squares on the first rank (c1 or e1) that are attacked by at least one white piece, often a queen or rook, and not attacked by any black pieces.",
"sae_3046": "The feature detects squares on the 7th rank that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_3044": "Detects a king on the back rank, with no white attackers, and no black attackers, indicating a potential back rank mate.",
"sae_3042": "The feature detects a king on the first rank, with the target square being an empty square on the first rank, adjacent to the king, and not attacked by any enemy pieces.",
"sae_2031": "A white minor piece delivers a decisive tactical blow against a poorly defended black bishop in a mating attack or endgame.",
"sae_2962": "White Knight on the 1st or 2nd rank, attacked by 0-1 black pieces, and defended by 2-4 white pieces.",
"sae_3060": "Detects an undefended square on the 7th rank, attacked by at least one black piece.",
"sae_2988": "White queen on a white-controlled square, attacked by 0 black pieces, and attacked by at least 2 white pieces.",
"sae_3066": "A black knight on b8, regardless of attack/defense counts.",
"sae_3073": "White pawn on g2 attacked by a white knight on f3, with no black attackers.",
"sae_2878": "Black king on g8 attacked by at least one black piece, with no white attackers.",
"sae_2586": "The white king is on the 8th rank, and there are no white pieces on the 7th rank.",
"sae_1430": "A white pawn on the 7th rank (c7 or d7) that is attacked by at least one black piece and defended by at least one white piece.",
"sae_3068": "White bishop on c1, attacked by at least one white piece, and not attacked by any black pieces.",
"sae_3095": "Active black rook in an endgame, often on an open file or rank, participating in interference, skewer, or mating threats.",
"sae_3099": "White rook on the first rank, attacked by at least one white piece, and optionally attacked by a black piece.",
"sae_3085": "White rook/queen attacks a black piece on the 7th or 8th rank, with the target square being defended by at least one black piece.",
"sae_3108": "The feature detects a Queen on the target square that is attacked by at least one enemy piece and defended by at most one friendly piece.",
"sae_3089": "The feature detects an empty corner square (a1 or h1) that is not attacked by any piece, with the king of the side-to-move located on the same rank as the corner square.",
"sae_3113": "The feature detects squares on the 7th rank that are attacked by Black pieces and not attacked by White pieces.",
"sae_3105": "White bishop on the kingside or in a fianchetto-adjacent square, with the white king in proximity.",
"sae_3114": "The feature detects an empty square on the 7th rank (a7, b7, or c7) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_3170": "White pawn on d4/e5 attacked by 2 black pieces and defended by 1 white piece.",
"sae_3134": "White rook on d4 or e4 (or a3) attacked by 0 or 1 black pieces and defended by 1 or 2 white pieces.",
"sae_3200": "Black knight on b8, attacked by black pieces, with no white attackers.",
"sae_3119": "A pawn on the 7th rank (for white) or 2nd rank (for black) that is not attacked by the opponent.",
"sae_3121": "White rook on its starting square (a1, c1, g1) with no white pieces on the 2nd rank and no black pieces on the 1st or 2nd rank, indicating an open or semi-open file for the rook.",
"sae_3174": "A white rook on the back rank (rank 1), attacked by at least one white piece and at most one black piece, commonly but not exclusively on d1 or e1.",
"sae_3186": "Detects a rook-and-pawn endgame with a dangerous advanced pawn (either colour) near promotion, often with opposing rooks contesting the file.",
"sae_3214": "White rook attacks a black pawn on the 6th or 7th rank.",
"sae_3202": "White piece pressure on black central pawns with attacker imbalance.",
"sae_3226": "Detects squares on the 7th rank that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_3227": "A bishop on d3 (or d6 for black), unattacked by the opponent and defended by at least one friendly piece.",
"sae_3233": "The feature detects squares on the 7th rank that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_3229": "White's rook on its starting square (c1 or e1) is attacked by one black piece and defended by at least one white piece.",
"sae_3252": "Black has castled kingside with the king on g8 and rook passively placed on f8, not yet activated.",
"sae_3275": "The feature detects squares on the 7th rank that are attacked by at least one black piece and are not attacked by any white pieces.",
"sae_3301": "Detects a black pawn on f6, f7, or g7, especially when attacked by black pieces and undefended or underdefended by white.",
"sae_3303": "The feature detects a white pawn on h2 attacked by a black piece and defended by a white piece, with the white king on g1 or h1.",
"sae_3286": "Pawn on the 7th rank (for white) or 2nd rank (for black) that can promote to a queen on the target square.",
"sae_3314": "White rook on a1, with a white pawn on a2 and a white knight on c3, and no black pieces attacking a1.",
"sae_3344": "An undeveloped or passive black bishop on the 8th rank (typically c8), often caught in a cramped position while white launches a kingside or central attack.",
"sae_3319": "White pawn on the 2nd rank (f2, g2, or c2) attacked by at least two white pieces and zero black pieces.",
"sae_3347": "White pawns on the 3rd or 5th rank that are attacked by at least two white pieces and zero black pieces.",
"sae_3345": "Kings in opposition or near-opposition in a pawn endgame, with both kings active and no pieces other than pawns.",
"sae_3315": "White's queen or rook attacks h7, which is defended by a black pawn, with the black king on g8 or h8.",
"sae_3354": "The feature detects the g8 square being attacked by exactly two black pieces, with no white pieces attacking it, and the square is empty.",
"sae_3364": "Detects a pawn on the 6th rank (a6 or h6) that is attacked by the opponent and not defended by the side to move.",
"sae_3372": "The feature detects a king on the target square that is attacked by at least one enemy piece, with the attacking piece often being a pawn or a rook.",
"sae_3378": "A black bishop on an advanced square attacked only by black pawns, with no white pressure.",
"sae_1857": "An undefended empty square on the 7th rank (for white) that is attacked by at least one black piece.",
"sae_3393": "Black's kingside pawn on g7 or h7 is attacked by exactly one black piece and zero white pieces.",
"sae_3387": "A black pawn on the 7th rank (a7 or h7) that is not attacked by white pieces.",
"sae_3379": "A pawn on the 5th rank (for the side to move) that is attacked by an enemy piece and defended by at least one friendly piece.",
"sae_3400": "Pawn on the 4th, 5th, or 6th rank that is attacked by at least 2 enemy pieces and defended by 0 friendly pieces.",
"sae_3449": "White's f1 square is empty and attacked by at least two white pieces, with no black attackers.",
"sae_3452": "A square is attacked by at least 3 white pieces and at most 1 black piece, and the square is empty.",
"sae_3424": "Detects a white bishop attacking an empty square, with the white king nearby, and no black attackers on the target square.",
"sae_3415": "White pawn on the 5th rank, attacked by 0-2 black pieces, and attacked by 0 white pieces.",
"sae_3459": "Black king in an active endgame position, frequently but not exclusively on the 7th or 8th rank, with no immediate attackers.",
"sae_3448": "Detects a central pawn on the 4th rank (d4, e4, or g4) that is under multi-piece attack, typically arising in middlegame pawn-break or deflection positions.",
"sae_3465": "White pawn on the 2nd rank attacked by one black piece and defended by two white pieces.",
"sae_3488": "King on the 2nd or 3rd rank, attacked by one enemy piece, and not defended by any friendly pieces.",
"sae_3475": "White's rook attacks a black rook on the 7th rank.",
"sae_3547": "A square is attacked by at least 4 black pieces and 0 white pieces.",
"sae_3500": "White pawn on h3/a3 attacked by 0-2 black pieces and defended by 1-2 white pieces.",
"sae_3533": "A pawn on the 2nd rank (for the side to move) that is attacked by at least one enemy piece and defended by at least one friendly piece.",
"sae_2061": "A black knight on or near the back rank, sidelined and inactive during a tactical sequence.",
"sae_3457": "Target square is undefended by white, attacked by at least two black pieces, and is on the 7th rank.",
"sae_3552": "White king on the 1st rank, with no white pieces on the 1st rank to its left.",
"sae_3569": "White's king-side castling square (g1 or f1) is empty and attacked by at least one white piece, with no black attackers.",
"sae_3588": "A pawn on the 4th rank (for white) or 5th rank (for black) that is attacked by two friendly pawns and not attacked by any enemy pieces.",
"sae_2239": "A black bishop on the 8th rank, especially on b8, c8, f8, or g8, with no white attackers.",
"sae_3578": "White's queen or bishop attacks a black pawn on a7 or h7, which is defended by at least one black piece.",
"sae_2241": "A pawn on g7 or h7 is attacked by a black piece, and not attacked by a white piece.",
"sae_3601": "White's pawn on b2 attacks a3, which is also attacked by a black piece.",
"sae_3604": "White knight on the back rank (1st or 8th) is attacked by at least one black piece and defended by at least one white piece.",
"sae_3570": "The feature detects an empty square on the first rank that is not attacked by white pieces, and is a potential castling square for the king.",
"sae_2260": "A pawn on the 2nd rank is attacked by an enemy piece and defended by a friendly piece, with the king nearby.",
"sae_3605": "A pawn on e4/d4/e5 that is attacked by at least two enemy pieces and defended by at least two friendly pieces.",
"sae_3647": "Detects squares attacked by black pieces that are not attacked by white pieces, especially when the target square is on the 4th rank or further from the white side.",
"sae_3708": "Detects a back-rank or 7th-rank attacking configuration in tactical middlegame/endgame positions, often involving a rook or queen penetrating to a key file.",
"sae_3725": "A square on the 7th rank (for white) or 2nd rank (for black) that is attacked by at least one enemy piece and not attacked by any friendly pieces.",
"sae_3679": "Black king on g8 or f8, sheltered by kingside pawns, in a middlegame or endgame tactical position.",
"sae_3714": "White pawns on the 5th rank that are attacked by fewer black pieces than white pieces.",
"sae_3630": "White attacks a black bishop on the 7th rank with one attacker, while black also defends it with one attacker.",
"sae_2340": "[polysemantic \u2014 fires on multiple unrelated patterns; needs split]",
"sae_3746": "The feature detects squares on the 7th rank that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_3744": "White pawns on the 6th or 7th rank that are attacked by multiple black pieces and not defended by white.",
"sae_2381": "A white knight on c3 or f3 that is attacked by at least one black piece and defended by at least one white piece.",
"sae_2406": "A white pawn on the 4th rank is attacked by a black piece and defended by at least two white pieces.",
"sae_3730": "Detects the h8 square being attacked by two black pieces, with no white defenders, and the white king on g1.",
"sae_3635": "A knight on the 4th rank (e.g., e4, d4, c6) that is attacked by at least one enemy piece and defended by at most one friendly piece.",
"sae_3782": "White King on the first rank is attacked by a Black Rook.",
"sae_2424": "A white rook or queen attacks a square on the 7th rank that is also attacked by a black piece.",
"sae_2425": "Black king on e8 with at least two black pieces defending squares adjacent to it.",
"sae_2549": "A pawn on any rank is under pressure from an enemy rook, often in a deflection or rook endgame tactic.",
"sae_3791": "Detects positions with an active white knight on an outpost square (typically rank 5-6), often in endgames or tactical mateIn1 puzzles.",
"sae_3408": "White pawn on the 2nd rank that is not attacked by white pieces.",
"sae_2509": "White's king is castled kingside, and the h1 square is attacked by at least one white piece, with no black attackers.",
"sae_3726": "Detects a pawn promotion to queen on or near a corner square (a1, c1, f1, h1, a8, h8), typically as the decisive move in a queen endgame.",
"sae_3526": "A piece on the target square attacked by at least one enemy piece and undefended by any friendly piece.",
"sae_3803": "Black rook on h8, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_2583": "The feature detects the c7 square being attacked by at least one black piece, with no white attackers, and often with a black queen or rook on the c-file.",
"sae_3789": "Queen endgame with an exposed king under indirect long-range queen pressure, requiring a precise defensive or counterattacking queen move.",
"sae_3808": "Target square is on the 7th rank, undefended by white, and attacked by exactly one black piece.",
"sae_3829": "White's queen or bishop attacks g7, which is occupied by a black pawn, and is defended by at least one black piece.",
"sae_3804": "The feature detects a target square on the 7th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_3793": "The feature detects a black pawn on h6, with no white attackers, and no black attackers (except in one case where a black pawn on g7 attacks h6).",
"sae_3691": "A white pawn on h3 is attacked by a black piece and defended by a white piece, with the white king nearby.",
"sae_3821": "Detects empty squares on the 2nd rank attacked by at least 3 white pieces and no black pieces.",
"sae_3813": "Detects a square on the 7th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_3846": "Black king on e8, attacked by at least one black piece, with no white attackers.",
"sae_2615": "The white king is on the first rank, trapped in a corner or edge square, with a mating attack imminent from the black side.",
"sae_3866": "White pawn on the 4th rank attacking an empty square on the 3rd rank, with the white king nearby.",
"sae_2663": "A white pawn on e5 or d5 that is attacked by at least two black pieces and defended by exactly one white piece.",
"sae_3875": "White attacks a black rook with one piece, while black defends it with two pieces.",
"sae_3802": "White Queen on the 1st or 2nd rank, unthreatened by black and defended by at least one white piece, typically in the opening or early middlegame.",
"sae_3982": "White rook attacks a black piece on the first three ranks, with one white attacker and one or two black attackers on the target square.",
"sae_4001": "Detects squares on the 7th rank that are attacked by the opponent and not attacked by the side to move.",
"sae_3991": "White pawn on the 6th rank (or 3rd rank from Black's perspective) that is attacked by a white piece and not attacked by a black piece.",
"sae_3896": "The feature detects a pawn on the 3rd or 4th rank that is attacked by at least one enemy piece and defended by at least two friendly pieces, with the side to move being the one defending the pawn.",
"sae_4002": "Detects a black knight on the 6th rank that is not attacked by white pieces.",
"sae_2715": "White's rook on a corner square (a1 or h1) is defended by at least one other white piece.",
"sae_4017": "Black king on e8 with no white attackers and at least one black attacker.",
"sae_3873": "Endgame positions with active rook manoeuvres and king-side pawn structures, where a rook dominates an open file.",
"sae_4027": "White's knight on d4 or e4 is attacked once by a black piece and defended twice by white pieces.",
"sae_4006": "The feature detects squares on the 7th rank that are attacked by Black pieces and not attacked by White pieces.",
"sae_3889": "Black's back rank (7th or 8th) is attacked by at least two black pieces, and not attacked by white.",
"sae_4024": "Endgame pawn advance (typically a- or h-file) with both kings active and nearby, in a bishop or pawn endgame.",
"sae_4037": "A pawn on the 5th rank (for the side to move) that is attacked by at least one enemy piece.",
"sae_4065": "White King is adjacent to a Black pawn on the 7th rank.",
"sae_3903": "Black's h7 pawn is attacked by at least one black piece, and white has no attackers on h7.",
"sae_3933": "Detects a white king on g1 and an undefended h8 square attacked by at least one black piece.",
"sae_4020": "White rook on the 5th rank attacking h2, with an additional white piece (queen or rook) also attacking h2.",
"sae_4082": "Target square is on the 7th rank, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_4035": "Black's king is on g8, and the g8 square is attacked by at least two black pieces.",
"sae_2955": "A white bishop on a light square is attacked by one black piece and defended by at least two white pieces.",
"sae_2925": "A white rook is attacked by a black piece, and the rook is on its starting square or a central square.",
"sae_3052": "Detects a black knight on c6 that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_3258": "White pawn on the 5th rank, attacked by a black pawn, and potentially attacked by white pieces.",
"sae_3102": "A white pawn on the 3rd or 4th rank, on the a or h file, with no black attackers.",
"sae_3251": "The feature detects a target square on the 8th rank that is attacked by both a white piece and a black piece, with no piece currently on the target square.",
"sae_3247": "Detects complex tactical positions where the side to move has undeveloped or passive pawns on their 2nd rank, often correlated with back-rank or piece-sacrifice motifs.",
"sae_3255": "Black king on e8 is attacked by at least one black piece, with no white attackers.",
"sae_3420": "White's f2 pawn is undefended by a white piece, and not attacked by a black piece.",
"sae_3460": "The feature detects the f7 pawn being attacked by two black pieces and undefended by white, with white to move.",
"sae_3540": "The feature detects a white queen on a5, regardless of whether it is attacked or defended.",
"sae_3747": "Black queen on d8, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_3973": "White king on the 3rd rank, with a white pawn on the 2nd rank directly in front of it, and the target square is the 2nd rank square in front of the king.",
"sae_3984": "A black bishop on a light square (b4, h5, g4) that is attacked by at least one black piece and zero or one white pieces.",
"sae_3936": "A white rook is on the 5th, 6th, or 7th rank, defended by at least one white piece, and attacked by at most one more black piece than it is defended.",
"sae_4048": "An empty square on the 7th rank (for white) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_4100": "The white king on g1 is attacked by exactly one black piece, and white has at most two defenders.",
"sae_4108": "Detects a queen on a square that is not attacked by the side to move, but is attacked by the opponent.",
"sae_4107": "Detects a rook on its starting square (or a square it could have started on, like h1) that is attacked by an enemy piece and undefended by its own side.",
"sae_4129": "A square on the first two ranks is attacked by one white piece and one black piece, with the white king on the first rank.",
"sae_4132": "A white piece attacks a black rook or queen on the back rank, with no black defenders.",
"sae_4131": "Detects tactical positions involving a material imbalance or pawn-chain tension in the centre or kingside, often preceding a forcing mating sequence.",
"sae_4153": "A black knight on b8, attacked by black and potentially attacked by white.",
"sae_4148": "A black rook is attacked by a white piece on the 7th or 8th rank, and the rook is not defended by a white piece.",
"sae_4144": "Black pawn on a7 attacked by at least two black pieces, with white having few or no attackers.",
"sae_4155": "A white bishop on its starting square (c1 or f1) is attacked by a white piece.",
"sae_4157": "White queen is attacked by white pieces, with no black attackers, on a square where it is the only piece.",
"sae_4110": "A white queen attacks a square on the 7th rank, which is also attacked by a black piece, and the square is either empty or contains a black pawn.",
"sae_4158": "Detects a square that is attacked by a black pawn and is on the 7th rank for white (or 2nd rank for black), often near the king.",
"sae_4171": "A white piece (Rook or Knight) is on a square attacked by one white piece and one or two black pieces.",
"sae_4199": "A black queen on a central or open file, not attacked by white pieces, with at least one friendly piece nearby.",
"sae_4187": "A black bishop on b7 or b4, attacked by no white pieces.",
"sae_4165": "A pawn on the 3rd, 4th, or 5th rank that is attacked by at least two enemy pieces and defended by at least one friendly piece.",
"sae_4177": "A pawn on the 5th rank (for white) or 4th rank (for black) that is attacked by at least one enemy piece and defended by at least one friendly piece.",
"sae_4196": "A square on the 6th rank is attacked by a black piece and not attacked by a white piece.",
"sae_4215": "A square attacked by the opponent, which White can capture with a pawn, and is also attacked by at least two other white pieces.",
"sae_4234": "White's queen or rook attacks h2, which is undefended or defended by a black piece, and the white king is on g1 or h1.",
"sae_4265": "Detects an undefended square on the 7th rank (g7 or h7) that is attacked by at least one black piece.",
"sae_4266": "Detects a queen on the first rank, especially when it is on a corner or near-corner square.",
"sae_4240": "Detects a pawn on the 2nd or 3rd rank (from its side's perspective) that is not attacked by the opponent and not defended by the side to move.",
"sae_4212": "The feature detects a target square on the back rank that is attacked by one white rook and at least one black piece, with the white king on the back rank.",
"sae_4268": "The feature detects an empty corner square (a1 or h1) that is not attacked by white, with the white king nearby.",
"sae_4264": "Detects a pawn on f2, d2, or g2 (the f7, d7, or g7 squares for black) that is attacked by at least one enemy piece and defended by exactly one friendly piece.",
"sae_4308": "Detects a king on the target square that is attacked by exactly one enemy piece and defended by zero friendly pieces.",
"sae_4288": "Detects a king on the first rank, with the target square being a square on the first rank occupied by a king.",
"sae_4318": "Detects a black queen on the first rank, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_4279": "A white piece attacks a black bishop on the 6th rank, which is also defended by at least one black piece.",
"sae_4285": "A white rook or queen on the 1st rank is attacked by a black piece, and the target square is the king's original square.",
"sae_4319": "A pawn on the 2nd rank (for the side to move) that is attacked by an enemy piece and defended by one of its own pieces.",
"sae_4339": "White pieces (especially knights and bishops) are attacking squares on the 4th, 5th, or 6th rank, often near the black king, with no black defenders.",
"sae_4332": "Pawn on the 2nd, 3rd, or 4th rank, attacked by an enemy piece, and defended by a friendly piece.",
"sae_4347": "A contested central or pawn-chain square doubly attacked by white pieces with little or no black resistance.",
"sae_4368": "Detects a white rook on the first rank, attacking an empty square on the first rank, with no black attackers on that square.",
"sae_4282": "A square on the 6th rank is attacked by the opponent and defended by the side to move, with the side to move having fewer attackers.",
"sae_4379": "Black pawn on g6 attacked by at least two black pieces, with 0-2 white attackers.",
"sae_4336": "A white queen is attacked by no black pieces and is on a square where it can be attacked by a white knight.",
"sae_4388": "White queen attacks a square on the 7th rank that is also attacked by a black piece, with the black king nearby.",
"sae_4384": "White King on h1 or g1, attacked by a white rook on the first rank, with no black attackers.",
"sae_4396": "Detects a black knight on a square attacked by exactly one black piece and zero white pieces.",
"sae_4400": "A white piece attacks a black piece on the 7th or 8th rank, and that black piece is also attacked by a black piece.",
"sae_4403": "A white-controlled, undefended central square (d4, d5, e4, e5) that is attacked by at least two white pieces.",
"sae_4409": "Detects a pawn on the 2nd rank (for the side to move) that is attacked by an enemy piece and defended by one friendly piece.",
"sae_4411": "A rook on the first rank (from its side's perspective) that is attacked by an enemy piece.",
"sae_4412": "A rook on the 3rd or 6th rank, often attacked by an enemy piece, and sometimes undefended.",
"sae_4462": "White Queen on h3 or g3, attacked only by White pieces.",
"sae_4463": "A white rook in an active endgame position, often on an open file or rank, with the king nearby.",
"sae_4467": "A square attacked twice by black pawns, with no white attackers, and the white king is nearby.",
"sae_4491": "Detects a queen on the target square, which is undefended by the side to move, and attacked by at least one enemy piece.",
"sae_4474": "A knight on the opponent's back rank (1st or 8th) that is not attacked by either side.",
"sae_4504": "Detects squares on the 8th rank that are attacked by multiple black pieces and not attacked by any white pieces.",
"sae_4547": "White's king is on the back rank, and the h8 square is undefended by white, making it a potential back-rank mate target for black.",
"sae_4488": "Detects the king on its starting square (rank 1) with no white attackers, often under attack by a black piece or in a vulnerable position.",
"sae_4553": "The feature detects an undefended h8 square, attacked by at least one black piece, with white to move.",
"sae_4507": "[polysemantic \u2014 fires on multiple unrelated patterns; needs split]",
"sae_4544": "Detects a square on the 7th or 8th rank that is attacked by a black piece and not attacked by a white piece.",
"sae_4513": "A knight on a central square (d4, d5, e4, e5) or a square adjacent to the center (c3, c6, f3, f6, b4, b5, g4, g5) that is attacked by at least two enemy pieces and defended by at least one friendly piece.",
"sae_4559": "White rook attacks a black rook on the same rank or file, with the black rook also attacked by at least one other black piece.",
"sae_4428": "The feature detects a pawn on g6 (or e4) that is attacked by at least one white piece and defended by at least two black pieces, often with a white queen or bishop involved in the attack.",
"sae_4567": "A square on the 3rd rank is attacked by at least one black piece and not defended by any white pieces.",
"sae_4572": "A white piece is attacked by 0 black pieces and 1 or 2 white pieces, on the 1st or 2nd rank.",
"sae_4618": "Black king on g8 attacked by at least one black piece, with no white attackers.",
"sae_4647": "White King on e1, attacked by at least two white pieces, with no black attackers.",
"sae_4642": "A square is attacked by at least one white piece and at most one black piece, and is not occupied by a piece.",
"sae_4630": "A rook on its starting square (a1 or h1) with no white attackers, and the king is castled or about to castle on the same side.",
"sae_4668": "A black queen is attacked by an equal or greater number of white pieces, and white is to move.",
"sae_4700": "The feature detects a king on a square that is not attacked by white, but is attacked by at least one black piece, and the king is not on its starting square.",
"sae_4626": "A white rook attacks a black pawn on the 7th rank, with no black attackers on the pawn.",
"sae_4768": "Kings are in close proximity in an endgame, with one side having a material or positional advantage that decides the outcome.",
"sae_4716": "The feature detects a pawn on the 5th or 6th rank that is attacked by at least two enemy pieces and defended by fewer friendly pieces.",
"sae_4718": "Detects a white queen on the same rank or file as another white queen, with the target square being the queen that is further away from the other queen.",
"sae_4777": "The feature detects a square that is attacked by a black pawn and is adjacent to the white king.",
"sae_4728": "White passed pawn on the 5th rank in an endgame, undefended by white but not yet under black attack.",
"sae_4774": "White attacks a black pawn on d4 or d5 with at least 3 pieces, outnumbering black's defenders.",
"sae_4770": "Detects an empty square on the back rank (rank 1 for white, rank 8 for black) that is attacked by exactly one white piece and exactly one black piece.",
"sae_4819": "Detects a black knight on the back rank (7th or 8th) that is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_4805": "A black rook is under white attack and defended by black, commonly on or near the 8th rank but not restricted to c8 or d8.",
"sae_4813": "White bishop on g2, attacked by 0 black pieces, and attacked by 1 white piece (a pawn on h3 or f3).",
"sae_4593": "A black knight is attacked by a white pawn, and the white king is nearby.",
"sae_4820": "White rook on the back rank (1st or 8th) is attacked by at least one white piece and not attacked by any black pieces.",
"sae_4804": "White attacks a black piece on the first rank, with the piece on the target square being a knight or bishop.",
"sae_4827": "The feature detects squares attacked by exactly one black piece and not attacked by any white pieces, which are also not occupied by any piece.",
"sae_4839": "Black bishop on f8 attacked by at least two black pieces, with no white attackers.",
"sae_4837": "White pieces (especially knights and pawns) defending a white bishop on c1 or d1, with no black attackers.",
"sae_4845": "Detects a black rook on an open file, attacked by one white piece and defended by two black pieces.",
"sae_4873": "Detects a king on its original square (e8/c8/g8) that is not attacked by the side to move.",
"sae_4868": "A pawn on the 2nd, 3rd, or 4th rank that is attacked by an enemy piece and either undefended or defended by one friendly piece.",
"sae_4879": "The feature detects a king on the first rank, attacked by one or more enemy pieces, and defended by one or more friendly pieces.",
"sae_4855": "Detects a black bishop on a light square, attacked by no white pieces, and not on the same rank/file as the black king.",
"sae_4884": "Detects a king on the back rank (1st or 8th) that is attacked by an enemy piece.",
"sae_4881": "Detects an empty square on d4 or e4 that is attacked by both sides, with a slight preference for white having more attackers.",
"sae_4894": "The feature detects a pawn on the 7th rank (from the perspective of the side to move) that attacks an empty square on the 8th rank.",
"sae_4886": "White king on e1 is attacked by 0 black pieces and defended by at least one white piece.",
"sae_4926": "A pawn on the 7th rank, with the king on the 8th rank, and no enemy pieces attacking the pawn.",
"sae_4960": "A white queen attacks a black queen, which is attacked by at least one other black piece.",
"sae_4961": "White pawn on the 4th rank, attacked by white pieces, and not attacked by black pieces.",
"sae_4937": "Detects a black bishop on a dark square on the a7-g1 diagonal, with no white attackers.",
"sae_4956": "A queen under attack but supported by a friendly piece, with the side to move having tactical pressure.",
"sae_4994": "A white piece attacks a black rook on a square that is not attacked by any black pieces.",
"sae_4978": "Detects a white king on the first rank, with a white rook on the h-file, and no black pieces attacking h1.",
"sae_5038": "Detects a white bishop on g5, h5, or b5, or an empty square on h5 with a white bishop attacking it.",
"sae_5009": "A white rook on the 1st rank is attacked by a black piece, and the rook is the only white piece defending its square.",
"sae_5030": "The feature detects squares attacked by exactly one white piece and at least two black pieces, often a pawn on the second rank or a king-side square.",
"sae_4951": "Detects an empty square on the back rank that is not attacked by white pieces.",
"sae_5051": "A square attacked by 3 white pieces and 1 black piece, where the target square is occupied by a black piece.",
"sae_4897": "White attacks a black rook on a corner square (a8 or h8) on the back rank.",
"sae_5043": "A pawn is on the 6th rank, attacked by a bishop on the long diagonal, with a friendly pawn on the 5th rank blocking the bishop's attack.",
"sae_5058": "White's queen attacks the h7 pawn, which is defended by at least one black piece.",
"sae_5085": "An active knight in an endgame tactical position, often delivering or enabling a mating attack.",
"sae_4971": "A queen on the 4th rank, attacked by a single enemy piece, with no friendly attackers.",
"sae_5080": "Detects a king on a light square, or a queen on a dark square, that is not attacked by either side.",
"sae_4983": "A pawn on c4 or d4 that is equally attacked and defended, with at least two attackers/defenders from each side.",
"sae_4694": "Kingside or back-rank mating pattern where black has a rook or minor piece defending the king's position but mate is forced by white.",
"sae_5073": "Detects a rook on its starting square (rank 1 or 8) that is attacked by at least one enemy piece.",
"sae_5098": "White's King is castled kingside, and the h1 square is attacked by at least one white piece, with no black attackers.",
"sae_5086": "Detects a white queen on a square attacked by exactly one white piece and zero black pieces.",
"sae_5115": "A queen is attacked by at least one white piece and not attacked by any black pieces.",
"sae_4757": "A white rook on its starting square (a1 or h1) that is not attacked by any black pieces.",
"sae_5117": "White rook on the 4th rank or higher attacking h2, which is undefended by black.",
"sae_5152": "Detects an empty square attacked by a white pawn, where the square is on the 2nd or 3rd rank relative to the white side.",
"sae_5154": "A black pawn on the 7th rank, not attacked by white, and often not attacked by black either.",
"sae_5185": "White king on the first rank, with no white pieces on the first rank between the king and the a-file or h-file.",
"sae_5187": "White attacks a black piece on a central square (c3, c5, g3, b3) with at least two pieces, where the black piece is a knight or bishop.",
"sae_5208": "King in an endgame position with no immediate threats, spanning pure pawn endings, rook endings, and minor-piece endings \u2014 likely a general 'safe king' feature across endgame types.",
"sae_5202": "A white piece attacks a black queen, which is the only piece on its square.",
"sae_5226": "White pawn on the 2nd, 3rd, or 4th rank with no black attackers, in a pawn endgame.",
"sae_5224": "A pawn on the 2nd, 3rd, or 4th rank that is attacked by an enemy piece and defended by a friendly piece.",
"sae_5184": "White Queen on the 2nd or 3rd rank, attacked by no black pieces, and defended by at most one white piece.",
"sae_5222": "White has a pawn on d5 (or e5) and is attacking an empty square on d6 (or e6) that is also attacked by at least one black piece.",
"sae_5172": "A square is attacked by the opponent and defended by the side to move, with the target square being empty or occupied by a king or rook.",
"sae_5159": "A knight is under tactical pressure, with pieces from both sides contesting the square or piece exchange.",
"sae_5235": "A black queen attacks a square on the first rank, which is not defended by white.",
"sae_5162": "The feature activates on squares that are attacked by at least two white pieces and are either undefended or defended by at most two black pieces.",
"sae_5236": "Detects a pawn or knight on the target square that is attacked by an opponent's piece and not defended by a friendly piece.",
"sae_5201": "White kingside rook undeveloped on h1 with the king still uncastled on e1 in an opening or early middlegame.",
"sae_5264": "A knight on the second rank (or third rank for black) that can move to the back rank.",
"sae_5267": "This feature detects a white bishop on g5, often undefended, and sometimes attacking a black piece.",
"sae_5326": "A pawn on the 2nd or 3rd rank that is attacked by an enemy piece and not defended by a friendly piece.",
"sae_5298": "A square is attacked by at least one enemy piece, and not attacked by any friendly pieces.",
"sae_5286": "White rooks connected or semi-connected on the back rank with the king nearby, in an uncastled or middlegame position.",
"sae_5338": "A pawn on the 6th rank (for White) or 3rd rank (for Black) that is attacked by a friendly piece and not attacked by an enemy piece.",
"sae_5356": "A square attacked by a white pawn and at least one black piece, with no piece on the square.",
"sae_5315": "A white rook under attack by black pieces and defended by a white piece, typically in a contested endgame with active back-rank or mid-board rook tension.",
"sae_5316": "White attacks an empty square on the 8th rank, which is also attacked by at least one black piece.",
"sae_5358": "White queen attacks an empty square on the 7th or 2nd rank, with no black pieces attacking that square.",
"sae_5360": "A pawn on the 2nd rank is attacked by at least one enemy piece and defended by at least one friendly piece.",
"sae_5234": "A queen on d1, d2, or f3 is attacked by one black piece and defended by two white pieces.",
"sae_5357": "This feature detects a black piece (especially a knight or bishop) on a light square, attacked by white, with the black king nearby.",
"sae_4156": "This feature detects a black pawn on the 5th rank that is attacked by at least two black pieces and is either undefended or defended by at most one white piece.",
"sae_5423": "A queen is attacked by an enemy piece, and the queen is on the same rank or file as the enemy king.",
"sae_5415": "Detects a bishop on a corner square (a7, h1, g1) that is not attacked by the opponent.",
"sae_5432": "A pawn on the 2nd or 3rd rank (from its side's perspective) that is attacked by an enemy piece and not defended by a friendly piece.",
"sae_5367": "White rook on or near the first rank in an endgame with active black passed pawns threatening promotion.",
"sae_5382": "Detects a black piece on the 7th rank (or 2nd rank for white) that is attacked by at least one black piece and attacked by fewer white pieces than black pieces.",
"sae_4201": "A black rook is on a central square (c2-c4, d6, g5) and is attacked by at least one white piece.",
"sae_5279": "White pawn on the 3rd or 4th rank in a passed-pawn endgame, with both kings actively contesting the promotion path.",
"sae_5282": "A queen on a contested square with White to move, under pressure from enemy pieces.",
"sae_5445": "King-and-pawn endgame decided by zugzwang, with no pieces other than kings and pawns.",
"sae_4175": "Contested pawn endgame with advanced passed pawns and opposing kings in close proximity, often featuring zugzwang.",
"sae_5444": "A pawn on the 2nd rank attacks an empty square on the 3rd rank, with the king nearby.",
"sae_5461": "White's king is castled kingside, and the g7 pawn is attacked by a black piece.",
"sae_5462": "A rook on the first rank (from its side's perspective) that is not attacked by the opponent.",
"sae_4193": "Black king on the back rank (a8\u2013h8) with at least one black piece defending it and no white attackers.",
"sae_4231": "A white queen is attacked by at least two black pieces, and defended by exactly one white piece.",
"sae_5484": "Detects a black rook on its original square (c8 or f8) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_5487": "White pawn on f2 attacked by 2 white pieces and 0 black pieces.",
"sae_5491": "A white knight or bishop on a contested central square, attacked by black and supported by multiple white defenders.",
"sae_5521": "A white king is on the first rank, and the target square is attacked by at least one white piece.",
"sae_5373": "White attacks a black queen with at least one white piece, and the queen is not defended by any black pieces.",
"sae_5514": "Detects a white piece applying tactical pressure on a contested square near the centre or king, with the attacked piece having at least one defender, in middlegame mating-attack positions.",
"sae_5519": "King is attacked by exactly one enemy piece, and is not defended by any friendly pieces.",
"sae_5513": "This feature detects a white rook on its starting square (e1, f1, c1) that is attacked by no black pieces and defended by at least one white piece.",
"sae_5525": "A white rook is attacked by at least one white piece, and not attacked by any black pieces.",
"sae_5541": "A knight on a central square (d5/f6) or a rook on f7 that is attacked by at least one white piece and at least one black piece.",
"sae_5542": "A pawn on the 2nd rank (for white) or 7th rank (for black) that is attacked by an enemy piece and not defended by a friendly piece.",
"sae_5528": "White rook or queen attacking h1, with the black king on g8 or h8, and no black pieces defending h1.",
"sae_5569": "A rook attacks a piece on the 7th or 8th rank, with no other pieces between them.",
"sae_5578": "White's Bishop is attacked by at least one Black piece, and White has at most one attacker on the Bishop.",
"sae_5555": "White's king-side rook is on h1, and the g-pawn is advanced, leaving the rook's path to the g-file open.",
"sae_4383": "A pawn on the 7th rank (for white) or 2nd rank (for black) that is not attacked by the opponent.",
"sae_5597": "A bishop is on a square, and it is attacked by at least one friendly piece.",
"sae_4406": "This feature detects a Rook on the 7th or 8th rank that is attacked by an enemy piece.",
"sae_5602": "White knight on a3 (or c3) that is either undefended or defended by white pieces and attacked by black pieces.",
"sae_5594": "A square is attacked by an enemy piece and undefended by friendly pieces, with the king nearby.",
"sae_4510": "A black pawn on the 7th rank (or 5th rank for black) that is heavily attacked by black pieces and not attacked by white pieces.",
"sae_5628": "A square attacked by at least one black piece and attacked by at most one white piece, where the square is on the 2nd or 3rd rank for white.",
"sae_5684": "A black bishop is under attack by white and defended by black, with black maintaining a defender advantage.",
"sae_5680": "A pawn on the 4th rank (from its side) that is attacked by an enemy pawn on an adjacent file.",
"sae_5637": "Detects a square on the 7th or 8th rank that is attacked by exactly one black piece and no white pieces.",
"sae_5692": "A white pawn on the 2nd or 3rd rank that is either undefended or under heavy attack, often near the white king.",
"sae_5643": "A pawn on the 4th or 5th rank is attacked by a single enemy piece, and is undefended by friendly pieces.",
"sae_5593": "Detects the e2 square being attacked by at least 4 white pieces, with no black attackers.",
"sae_5708": "A pawn on the 3rd or 4th rank (from its side) that is not attacked by the opponent.",
"sae_5687": "A pawn endgame where key square control or zugzwang determines the outcome.",
"sae_5701": "A square attacked by one white piece and three black pieces.",
"sae_5733": "King on the target square is attacked by exactly one black piece and defended by zero or one white pieces.",
"sae_5716": "A white queen on the 8th rank, with no black attackers on it.",
"sae_5731": "White King on a corner or edge square, with no white attackers on it, and no black attackers on it.",
"sae_4606": "A white piece attacks a black piece on a square, and no black piece attacks that square.",
"sae_4577": "White attacks an empty square on the 3rd rank, with no or few black attackers.",
"sae_4619": "White's light-squared bishop on c1 is attacked by no black pieces and defended by at least two white pieces.",
"sae_5739": "Black rook on a8, with no white attackers, and a black pawn on b7.",
"sae_5754": "Detects a Queen on the 6th, 7th, or 8th rank, especially when it is attacked by a friendly piece or is the only piece on the target square.",
"sae_5749": "Pawn on the 2nd rank (a2 or h2) that is not attacked by any piece.",
"sae_5764": "King opposition and zugzwang in pawn endgames.",
"sae_4709": "A rook or queen is outnumbered on a contested square, often preceding a tactical exchange or sacrifice.",
"sae_5785": "A knight on the 7th rank, especially if it's on the a or h file, and not attacked.",
"sae_5792": "A white rook attacking a black rook on the same rank or file, with both rooks being the only attackers of their respective colors on that square.",
"sae_5810": "White Knight on c3 attacked by one black piece, with at least one white attacker on c3.",
"sae_5711": "Detects a pawn on a2/a3/h2/h3 that is undefended by a friendly piece and attacked by an enemy piece.",
"sae_4746": "A white pawn on the 3rd or 4th rank, attacked by no black pieces, and defended by at most one white piece.",
"sae_5736": "A white piece attacks a black bishop on its starting square (f8, c8, g7, b7, a6, e4, b5) which is also defended by a black piece.",
"sae_5620": "A white pawn on the 4th, 5th, or 6th rank, potentially attacked, with no white pieces directly behind it.",
"sae_5756": "Detects a king near its back rank under direct attack from an enemy long-range piece with limited defensive resources, typically in defensive-move puzzles.",
"sae_5767": "The feature detects squares on the a-file or b-file that are attacked by a black rook from the 6th or 7th rank, with the white king on the 1st or 2nd rank.",
"sae_5838": "Detects a white pawn on e3 or f3 that is attacked by a black piece and defended by at least one white piece.",
"sae_5804": "A queen is attacked by at least one enemy piece, and is not defended by any friendly pieces.",
"sae_5841": "A white bishop is attacked by at least one black piece, and is not defended by any white pieces.",
"sae_5862": "A black pawn on the 4th or 5th rank is attacked by 0-1 white pieces and defended by at least 2 black pieces.",
"sae_5866": "A square is attacked by at least one white piece and at least two black pieces, with the number of black attackers being greater than or equal to the number of white attackers.",
"sae_5847": "A white queen on the 5th rank, attacked by at most one black piece, and defended by at least one white piece.",
"sae_5877": "A piece on the first rank is attacked by an equal number of white and black pieces, with white having at least one attacker.",
"sae_5835": "A square attacked by two black pieces and defended by one white piece, where the white piece is a king or rook.",
"sae_5872": "A square on the first two ranks is attacked by 3 white pieces and 1 black piece, with white to move.",
"sae_5908": "Detects a knight on a square that is attacked by at least one black piece and defended by at most one white piece.",
"sae_5867": "White rook on its starting square (d1 or e1) with at least one white attacker and no black attackers.",
"sae_5922": "A bishop on the opponent's second rank (7th for white, 2nd for black) that is not attacked by either side.",
"sae_5928": "White attacks a black piece on f6/e6 with one or two pieces, while black also defends it with one or two pieces.",
"sae_5930": "White king on the back rank (c1\u2013h1 range), defended by own pieces, in a tactical endgame or mating sequence.",
"sae_5978": "White Bishop attacks a Black Pawn on the 5th rank, with the White King nearby.",
"sae_5901": "Detects an undefended square on the 8th rank (d8 or f8) that is attacked by 3-4 black pieces.",
"sae_5715": "The feature detects the g8 square being attacked by at least one black piece, with no white attackers, and the white king is on the kingside.",
"sae_5993": "Detects a square on the back rank (or 5th rank for black) that is attacked by at least one black piece, but not by any white pieces.",
"sae_5923": "Detects an empty square attacked by exactly one black piece, with no white attackers, and the white king is nearby.",
"sae_6007": "The feature detects a king on the 6th rank, with the target square being a square on the 6th rank that is not attacked by the opponent.",
"sae_5996": "Detects a black pawn on g7 or h7, attacked by one black piece and zero white pieces, with the black king on the back rank.",
"sae_6013": "A white queen is attacking a square on the 6th, 7th, or 8th rank, which is occupied by a black queen.",
"sae_6008": "White's queen attacks a square on the back rank, which is defended by at least two black pieces, and is often the king's original square.",
"sae_6015": "A central empty square (d4, c3, e3, e4) that is attacked by both sides, with white having at least one pawn attacker and black having at least one knight attacker.",
"sae_6016": "A white passed pawn on the 4th or 5th rank in a pawn endgame, often contested or part of a pawn race.",
"sae_6032": "A white bishop on a dark square, on the a1-h8 diagonal, with a black pawn on the target square on the h3-c8 diagonal.",
"sae_6027": "White pawn attacks a black pawn on the 5th or 6th rank, which is also attacked by at least one other black piece.",
"sae_6034": "A white bishop on the 5th rank, attacked by at least one black piece, and often undefended by white.",
"sae_6045": "White rook attacks an undefended black rook.",
"sae_6080": "A white rook attacks a black piece on the first or second rank, with no black attackers on the target square.",
"sae_6051": "A square on the 7th rank (for white) or 2nd rank (for black) that is attacked by one friendly piece and defended by one enemy piece.",
"sae_6069": "Detects squares on the 7th rank that are attacked by at least one black piece and not attacked by any white pieces, often near the black king.",
"sae_6074": "Detects squares attacked by at least two enemy pieces, with the target square being empty.",
"sae_6092": "Detects the black king on e8 being attacked by multiple black pieces, with no white attackers.",
"sae_6103": "Detects an empty square on the first rank that is attacked by a pawn and defended by the king.",
"sae_5122": "White attacks the b8 square, which is empty and on the back rank, with at least one white piece.",
"sae_6084": "A square is attacked by at least two black pieces and at least one white piece, with the white pieces having fewer attackers than black.",
"sae_6108": "A black knight on the back rank (a8\u2013h8) that is not under white attack.",
"sae_6115": "White pawn on the 7th rank, especially if it's a passed pawn or has white attackers.",
"sae_6119": "White's pawn on d5 or e5 is attacked by fewer black pieces than white pieces, with white having at least 2 attackers and black having at most 3 attackers.",
"sae_5136": "A black bishop is actively placed on an open diagonal, often targeting a weak pawn or king.",
"sae_5143": "White pawn on the 4th rank attacking a black pawn on the 5th rank, where the black pawn is attacked by 3-4 black pieces and only 1 white piece.",
"sae_5196": "A square on the 6th or 7th rank is attacked by one white piece and defended by one black piece, with no piece on the target square.",
"sae_6138": "Pawn endgame or minor-piece endgame where control of a central outpost on ranks 5\u20136 is the key positional factor determining the result.",
"sae_5132": "The feature detects an empty square on b6 that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_5991": "A white piece (rook or bishop) attacks a square on the first rank, which is also attacked by a black piece, and the square is empty.",
"sae_6147": "Detects a rook on its starting square (or a square it could have started on) that is not attacked by the opponent.",
"sae_5761": "A king on rank 1 or rank 8 with no opposing pieces attacking its square, typically in an endgame or mating-net position.",
"sae_6167": "An empty square on the first rank is attacked by at least one black piece.",
"sae_6160": "White rook on the 4th rank, targeting a black rook on the 8th rank, with no white attackers on the target square.",
"sae_6188": "The feature detects a white attack on a black king-side pawn on the 7th rank (g7 or h7), where the square is defended by at least one black piece.",
"sae_6173": "A white rook attacks a black piece on the 6th, 7th, or 8th rank, with the black piece also attacked by a black piece.",
"sae_6143": "A white pawn on d6 (or d5) that is either undefended or defended by white, and is not attacked by black.",
"sae_6206": "A knight or bishop on the back rank (1st or 8th) that is not attacked by the opponent.",
"sae_6205": "White's king is castled kingside, and the e1 square is attacked by at least 3 white pieces, with no black attackers.",
"sae_6203": "A pawn on the 2nd or 3rd rank (from its side) that is attacked by an enemy piece and defended by a friendly piece.",
"sae_6146": "A white queen is on the 2nd rank, and the target square is on the 2nd rank.",
"sae_6207": "A square on the h-file (h4 or h5) is attacked by a black piece, and white has at least one attacker on that square.",
"sae_6145": "A square on the 5th rank is attacked by a black piece and not attacked by a white piece.",
"sae_6216": "A square attacked by one white piece and at least one black piece, where the square is on the 6th rank.",
"sae_6210": "Detects a pawn on the 2nd rank (from its own side's perspective) that is not attacked by either side.",
"sae_6174": "Detects a white queen or rook attacking a square on the 7th or 8th rank, often an empty square near the black king, with no black defenders.",
"sae_5277": "A pawn on d4/d5/e4/f4 (center/kingside) is attacked by at least two white pieces and defended by one black piece.",
"sae_6221": "The feature detects an empty square on the 3rd rank (for white) or 6th rank (for black) that is attacked by at least one friendly piece and not attacked by any enemy pieces.",
"sae_6238": "The feature detects a piece on a square that is attacked by one of the side-to-move's pieces and also attacked by at least one of the opponent's pieces.",
"sae_6164": "White's rook attacks a square on the 7th rank that is defended by a black piece or pawn.",
"sae_6227": "A central square (d4, d5, e4, e5) or a square on the c or f files (c4, c5, e3, f4) that is attacked by at least two white pieces and at least two black pieces, with white having at least as many attackers as black.",
"sae_6243": "Two white bishops cooperating to control critical squares near the enemy king, typically in the context of a double-bishop mating attack or decisive positional squeeze.",
"sae_6247": "White's king is on e1 and can castle kingside (O-O) to g1, which is attacked by at least one white piece and not attacked by any black pieces.",
"sae_6258": "The feature detects a white queen on the 2nd or 3rd rank, attacked by at least one white piece, with no black attackers.",
"sae_6270": "Target square is attacked by multiple black pieces, and is on the king's side.",
"sae_5280": "White rook attacks a black pawn on the 7th rank, with no black defenders on the pawn.",
"sae_6232": "Detects an advanced passed pawn near the opponent's king in an endgame, creating a promotion or mating threat.",
"sae_6289": "Detects squares that are attacked by the opponent and are on the same rank or file as the king, but not directly adjacent to the king.",
"sae_6268": "A white pawn on the 2nd rank (f2, g2, h2) or a white piece on the 1st rank (g1) is attacked by one black piece and defended by two white pieces.",
"sae_6279": "A white knight on c3 or f3 that is attacked by at least one white piece and not attacked by any black pieces.",
"sae_6286": "A black rook or queen is actively placed on the 7th or 8th rank, exerting pressure with no immediate white counterattack.",
"sae_6282": "A queen on the 3rd, 4th, or 5th rank, attacked by one enemy piece, with no friendly attackers.",
"sae_6303": "White King on g1, potentially castled, with no black attackers.",
"sae_6371": "Detects a black rook on the 7th or 8th rank, not attacked by white pieces.",
"sae_6276": "Black rook actively repositioned in a rook endgame, participating in a skewer or back-rank tactic.",
"sae_6376": "A white pawn on the 5th rank is attacking an empty square on the 6th rank.",
"sae_6394": "White pawn on h3, attacked by Black, and defended by White.",
"sae_6291": "Undefended rook on the back rank under enemy pressure.",
"sae_6320": "A white piece attacks a black queen, which is either undefended or defended by fewer pieces than it is attacked by.",
"sae_6316": "The feature detects an empty square on the first rank, attacked by the side to move with at least two pieces and by the opponent with exactly one piece.",
"sae_6403": "White king on g1, attacked by a white rook on h1, with no black attackers.",
"sae_6305": "White knight on b1, attacked by white pieces, with no black attackers.",
"sae_6362": "The feature detects an empty square on the first rank (a1, b1, or h1) that is attacked by at least two white pieces and zero black pieces.",
"sae_6424": "Detects a black knight on a corner square (a1 or h1) or a side square (a5) that is not attacked by white, especially when it is the only piece on that square.",
"sae_6442": "A square is attacked by at least one black piece and not attacked by any white piece.",
"sae_6430": "The feature detects a square on the 6th rank (for white) that is attacked by white and more heavily attacked by black.",
"sae_6433": "A white pawn on the 3rd, 4th, or 5th rank is attacked by one black piece and defended by one white piece.",
"sae_5837": "A queen is attacked by a white piece and is not defended by a black piece (except in one case where it is defended by a black pawn).",
"sae_6435": "Detects a rook on its starting square (a1 or h1) with no attackers, often indicating it's not yet developed or has returned to its original position.",
"sae_5459": "Black king on e8 with key adjacent squares defended by black pieces and no white attackers.",
"sae_6445": "A pawn on the 3rd rank (f3, g3, b3) that is attacked by at least one white piece and not attacked by any black pieces.",
"sae_6444": "A white rook on the 2nd or 3rd rank is attacked by one black piece and defended by one or two white pieces.",
"sae_6449": "A white rook on its starting square (a1 or h1) is attacked by exactly one white piece.",
"sae_6446": "Black's king-side rook on f8 is attacked by multiple black pieces, with no white attackers.",
"sae_6447": "White pawn on a2, attacked by Black, with White having at least one attacker.",
"sae_5436": "A black queen is on the first rank, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_6474": "White rook on a1, unattacked, with a pawn on a2 and no other pieces on the a-file.",
"sae_5503": "A white pawn on the 2nd rank is attacking a central square (c4, e4, f4) that is also attacked by a black piece.",
"sae_5457": "A white pawn on a3 (or h3) with no white attackers and no black attackers, often with a white pawn on b2 and a black pawn on b4.",
"sae_6503": "Black king on the back rank (7th or 8th from white's perspective) is attacked by at least two black pieces, with no white attackers.",
"sae_6498": "White's queen or bishop attacks h7, which is defended by a black pawn or is empty, with the black king on g8 or f8.",
"sae_6506": "A square is attacked by at least one enemy piece, and no friendly pieces.",
"sae_6451": "A pawn on the 7th rank is attacked by an enemy piece.",
"sae_5475": "This feature detects a square on the first rank that is attacked by at least one black piece and is either empty or occupied by a white piece.",
"sae_5448": "White rook on the first rank (f1 or g1) is attacked by a black rook, with no other white pieces defending it.",
"sae_6552": "The feature detects an empty square on the a-file (a4 or a5) that is attacked by a black bishop on the b-file (b4 or b3) and is not attacked by any white pieces.",
"sae_6530": "A queen is attacked by one piece and defended by one piece, with the attacking piece being a knight or bishop.",
"sae_6521": "Detects a pawn on the 7th rank (for white) or 2nd rank (for black) that is attacked by an enemy piece and defended by a friendly piece.",
"sae_6572": "Detects a black queen on the first rank, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_6575": "White attacks a black piece on the 7th or 8th rank with two pieces, while Black defends it with one or two pieces.",
"sae_6456": "A pawn on the 4th rank (d4/e4) that is attacked by a pawn on an adjacent file (c5/f5 or c4/f4) and defended by a pawn on an adjacent file (c3/f3 or c4/f4).",
"sae_6510": "The feature detects an undefended square on the 7th rank, especially a7, that is not attacked by the opponent and is a potential target for a rook or queen.",
"sae_6583": "Black rook on its original square (8th rank) is attacked by at least two black pieces, with no white attackers.",
"sae_6580": "White pawn on g2/h2/g1, defended by a king on g1/g2/h1, with no black attackers.",
"sae_6627": "King and pawn endgame with a fork or zugzwang motif, typically involving passed pawns or a king forced into opposition.",
"sae_6571": "White pawn on a2 attacked by a black piece, with white having at least one defender.",
"sae_5573": "A white pawn on the 4th or 5th rank that is attacked by at least one black piece and defended by at most one white piece.",
"sae_6631": "A white pawn on the 3rd, 4th, or 5th rank is attacked by at least one black piece and defended by exactly one white piece.",
"sae_6484": "The feature detects an empty square on the a-file that is attacked by a white rook or queen, with a preference for a8.",
"sae_6635": "A white piece (often a knight or bishop) on f3 or d2 is attacked once by black and defended at least twice by white.",
"sae_6513": "A sliding piece moves to rank 3 or 6 delivering a decisive mating attack or checkmate.",
"sae_6477": "Detects squares on the 7th rank that are attacked by a black pawn, especially when the square is empty or undefended by white.",
"sae_6644": "Detects a black bishop on the 5th or 6th rank that is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_6608": "White King on g1, defended by exactly one white piece, with no black attackers.",
"sae_5587": "Detects mating net positions (swallow's tail, epaulette, Arabian) where black's defensive pieces are overloaded or misplaced.",
"sae_6648": "Detects a White Rook on the 6th rank, especially on the a or f file, with or without attackers.",
"sae_6554": "A pawn on the 6th or 7th rank that is attacked by an enemy piece and not defended by a friendly piece.",
"sae_6642": "Detects squares attacked by at least one black piece and not attacked by any white piece, often near the white king.",
"sae_6709": "A square is attacked by one white piece and one black piece, often on the kingside, with white to move.",
"sae_6654": "A white piece attacks a black rook on a central square (d4, e4) or a square on the 7th rank (c7, d1, e4).",
"sae_6662": "Detects a black bishop on f8, attacked by black pieces, with no white attackers.",
"sae_6669": "Detects a black bishop on the back rank, especially when it's undefended by other black pieces.",
"sae_6694": "Detects a black piece on the 7th or 8th rank that is not attacked by white, with a white pawn on the 6th or 7th rank.",
"sae_6691": "A black pawn on the 6th or 7th rank is undefended by any piece, and the white king is on the 1st or 2nd rank.",
"sae_6688": "A queen or rook is attacked by at least one white piece, and not attacked by any black pieces.",
"sae_6712": "A black pawn on h4 or h5 is attacked by at least one black piece and not attacked by any white pieces.",
"sae_6671": "Detects a rook remaining on its starting corner square (a1 or h1) while the king has moved away, indicating a potentially undeveloped or misplaced rook in a middlegame position.",
"sae_6724": "White has one attacker on a back-rank square (c8, d8, or e8) that is heavily defended by black pieces.",
"sae_6726": "Detects squares on the 7th rank (or 2nd rank for Black) that are attacked by a Queen and are near the enemy King.",
"sae_6761": "The king on g1 (or h2) is attacked by one black piece and defended by one white piece, with a white queen nearby.",
"sae_6768": "Detects the black king being on the back rank (8th rank) with no pawns in front of it.",
"sae_6770": "Detects a black rook on its starting square (8th rank) that is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_6764": "Detects a black knight on a central square (c3, c5, d5, e5, b4) that is attacked by white and not defended by black.",
"sae_6765": "A knight on f6 or c6 is attacked by one white piece and defended by one or two black pieces, with white to move.",
"sae_6782": "A white queen is attacked by at least one white piece, and not attacked by any black pieces.",
"sae_6773": "Detects a king on a central square (d5, e5, d6, e6, f5) that is not attacked by white, often with black pieces nearby.",
"sae_5686": "A queen under direct attack by an enemy piece, forcing a defensive or counter-tactical response.",
"sae_6790": "White's queen attacks h7, which is defended by a black pawn, with no other pieces attacking or defending h7.",
"sae_5675": "White pawn on h2 attacked by a black piece and defended by a white piece, with white to move.",
"sae_6693": "Detects a square on the 7th rank that is attacked by a rook from the 4th rank, with no other pieces on the 7th rank.",
"sae_6737": "A black minor piece is under pressure from white pieces, often leading to a discovered attack or forced capture that wins material.",
"sae_6809": "A white knight on a central square (c3, c4, b5, g5) that is attacked by at least one black piece and defended by at least one white piece.",
"sae_5663": "White king on the 6th rank in a king and pawn endgame, typically in distant opposition with the black king on the 8th rank.",
"sae_6855": "A rook on its starting square (a1 or h1) with no white attackers and no black attackers.",
"sae_6830": "A white rook on the 2nd or 3rd rank is attacked by one black piece and defended by one or two white pieces.",
"sae_6865": "White's Knight on b1 is attacked by at least one white piece and not attacked by any black pieces.",
"sae_6870": "Two white bishops coordinating to deliver or threaten double-bishop mate, with the light-square bishop active and uncontested.",
"sae_6794": "A white queen or rook attacks a black piece (rook or bishop) on a square where the black piece is undefended.",
"sae_6819": "A white pawn on the 5th rank attacks a square on the 6th rank, which is also attacked by a black piece.",
"sae_6800": "A pawn on the 7th rank, one square away from the target square, with the king on the 8th rank.",
"sae_6831": "This feature detects a pawn on the 7th rank, regardless of color, that is not attacked by the opposing side.",
"sae_6858": "A square attacked by the opponent, where the attacking side has fewer attackers than the opponent.",
"sae_6900": "A pawn on the second rank (from its side) that is attacked by an enemy piece and defended by fewer friendly pieces than enemy attackers.",
"sae_6907": "A white pawn on the 2nd rank is attacking a square on the 4th rank.",
"sae_6903": "Detects squares attacked by two black pieces and one white piece, often a knight on the target square.",
"sae_6913": "A pawn on the 4th or 5th rank, attacked by at least one enemy piece, and defended by at least one friendly piece.",
"sae_6916": "White King on the 3rd rank, with no attackers or defenders.",
"sae_6910": "A white rook on the first three ranks (1-3) is attacked by one black piece and defended by two white pieces.",
"sae_6948": "A white pawn on the 3rd or 4th rank is attacked by a black piece, and white has 0 or 1 attacker on it.",
"sae_6922": "Detects a black knight on the back rank (rank 8) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_6926": "White's king rook is on its starting square (e1 or a1/h1) and is attacked by at least one white piece, but not by any black pieces.",
"sae_6930": "A pawn on the 4th or 5th rank (from white's perspective) that is attacked by at least one white piece and at least one black piece, with the king nearby.",
"sae_7005": "A pawn on the 7th rank (for white) or 2nd rank (for black) that is not attacked by the opponent.",
"sae_6962": "A white pawn on the 2nd rank is attacking a target square on the 3rd rank, which is also attacked by at least two other white pieces and not attacked by any black pieces.",
"sae_6975": "A square dominated by a white knight where white has equal or superior control over black.",
"sae_6987": "The feature detects a black knight on a central square (d4, d5, e4, c5) that is attacked by at least one white piece and defended by at least two black pieces, with white to move.",
"sae_7006": "Detects a queen on a square attacked by at least one enemy piece, with no friendly pieces defending it.",
"sae_7019": "A pawn on the 2nd rank (for white) or 7th rank (for black) is attacked by one friendly piece and defended by one enemy piece.",
"sae_6877": "A white pawn on the 2nd rank is attacked by at least one white piece and not attacked by any black pieces.",
"sae_7024": "The feature detects a black pawn on the 7th rank (d7 or e7) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_7047": "Detects squares on the 7th rank (for black) or 2nd rank (for white) that are attacked by at least 3 enemy pieces and not defended by any friendly pieces.",
"sae_6992": "Detects a central square (d5, e5, f5) that is attacked by the side to move and defended by the opponent, with the side to move having at least one more attacker than the opponent.",
"sae_7034": "A white piece directly attacks an undefended black piece, winning material \u2014 includes discovered attacks that expose a hanging target.",
"sae_7069": "White rook on the first rank, attacked only by white pieces, with multiple white attackers.",
"sae_7059": "White Knight on b1 or g1, attacked by 1-2 white pieces, and 0 black pieces.",
"sae_7071": "A black queen is on the target square, attacked by 0 white pieces and 0-2 black pieces.",
"sae_7056": "A white bishop is attacked by 0 black pieces, and is on a square that is attacked by at least one white piece.",
"sae_7104": "White bishop attacks a black bishop on the 7th rank, which is defended by at least two black pieces.",
"sae_7075": "White attacks an empty square on the 7th or 8th rank, which is either undefended or defended by only one black piece.",
"sae_7101": "Detects a piece (Rook, Bishop, Knight) on a square that is attacked by a friendly Queen, with the Queen being the only friendly attacker.",
"sae_5738": "A rook on the 8th rank attacks an empty square on the 1st or 2nd rank, with no white defenders.",
"sae_7110": "Detects squares attacked by at least two enemy pieces, with no friendly attackers.",
"sae_7096": "A square attacked by a black pawn, where the target square is on the 6th or 7th rank.",
"sae_7078": "A square attacked by the opponent, with at least one white attacker, and the square is on the 6th rank.",
"sae_7035": "Detects the king's original square (e1/e8 for white/black) or a square on the first rank (for white) or eighth rank (for black) that is empty and not attacked by either side.",
"sae_7107": "The feature detects the h1 square being attacked by both sides, with the white king on g1 or h1.",
"sae_7099": "A Queen on e2 or f3 is attacked by one enemy piece and defended by at least one friendly piece, with the attacking side to move.",
"sae_7076": "The feature detects an empty corner square (a8 or h8) that is not attacked by the side to move, and is either not attacked by the opponent or attacked by a single opponent piece.",
"sae_7119": "Detects an empty square on the first or seventh rank that is attacked by at least one friendly piece and not attacked by any enemy pieces.",
"sae_7168": "A white rook that is contested (attacked by a black piece and defended by a white piece) anywhere on the board in a tactical or endgame position.",
"sae_7147": "A square is attacked by exactly one black piece and zero or one white pieces, and is on the same rank or file as the white king.",
"sae_7180": "Black king on e8 is attacked by at least 3 black pieces, with no white attackers.",
"sae_7123": "A square is attacked by at least two white pieces, with no black attackers, and is on the 2nd, 3rd, or 4th rank.",
"sae_7154": "A queen on ranks 2-3 (or 6-7 from Black's perspective) attacked by an enemy piece, with at least one friendly defender.",
"sae_5779": "Detects a White Bishop on the first rank, with no attackers from either side, often in an endgame or simplified position.",
"sae_7226": "A white pawn on g2 or b2 is attacked by a white piece and not attacked by a black piece.",
"sae_7203": "A king on a square attacked by both sides, or attacked by black and undefended by white.",
"sae_7133": "The feature detects a pawn on the 7th rank (for white) or 2nd rank (for black) that is not attacked by the opponent and is not defended by the same side.",
"sae_7218": "White King on the back rank (1st or 2nd) with at least one white attacker and no black attackers.",
"sae_7183": "Black king on g7, with no white attackers, and a white queen on the a1-h8 diagonal.",
"sae_7250": "Detects a pawn on a2/b3 that is attacked by a black piece and undefended by white.",
"sae_7235": "A piece (often a queen or bishop) is attacked by two white pieces, with no black defenders.",
"sae_7271": "White's bishop on g2 or pawn on b2 is attacked by 0 black pieces and defended by 1 white piece.",
"sae_7264": "A white rook attacks an empty square on the 7th or 8th rank, with no black pieces attacking that square.",
"sae_7252": "A black knight on c6 is attacked by one white piece and defended by one black piece, with a white bishop on b5.",
"sae_7263": "White queen actively placed in a central or tactical role, defended by at least one white piece with no black attackers.",
"sae_7301": "Detects a black bishop on the 7th or 8th rank that is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_7063": "White pawn on the 4th or 5th rank attacked by one black piece and defended by two white pieces.",
"sae_5814": "A white pawn on d5 or e5 (or e4) that is attacked by fewer black pieces than white pieces.",
"sae_7265": "Detects an empty square on the 4th rank (for White) or 5th rank (for Black) that is attacked by a friendly pawn, often with no enemy attackers.",
"sae_7302": "Pawn endgame with zugzwang and advancing passed pawns.",
"sae_7314": "White has two attackers on the g5 square, which is currently empty.",
"sae_7305": "The feature detects squares attacked by exactly one white piece and at least one black piece, where the target square is not occupied by a white piece.",
"sae_7374": "A white queen is attacked by one black piece and defended by one or two white pieces.",
"sae_7319": "A king or queen is on the target square, and it is not attacked by the opponent.",
"sae_7350": "The feature detects a square that is attacked by at least two white pieces and at least one black piece, with the target square being empty.",
"sae_7439": "Detects squares on the 7th or 8th rank attacked by at least one black piece, with a preference for squares attacked by multiple black pieces.",
"sae_7316": "A rook on the first rank is attacked by an enemy piece, and defended by a friendly piece, with the target square being the rook's original square.",
"sae_7454": "White Queen attacks a black pawn on the 7th rank, which is defended by at least one black piece.",
"sae_7377": "A pawn on the second rank of the side to move, attacked by an opponent's piece, and either undefended or defended by at least one piece.",
"sae_7434": "Detects a white rook directly contesting a black rook on or near the 8th rank, creating back-rank pressure or a rook exchange threat.",
"sae_7392": "Detects an undefended f8 square, attacked by at least two black pieces, with the white king on g1 or h1.",
"sae_7327": "Detects a square attacked by exactly one black pawn.",
"sae_7386": "The feature detects a pawn on the 7th rank (for white) or 2nd rank (for black) that is adjacent to the target square, which is on the 3rd rank (for white) or 6th rank (for black), and is not attacked by the side to move.",
"sae_7443": "A queen on its starting square (d1/e2) or f3, attacked by one enemy piece, and defended by at least two friendly pieces.",
"sae_7455": "A square is attacked by 3 black pieces and 0-2 white pieces, with white to move.",
"sae_7457": "Detects advanced passed pawns in endgames where the superior side holds a decisive positional or material advantage, often with promotion imminent.",
"sae_7257": "Contested central or kingside 4th-rank pawn under pressure from multiple enemy pieces.",
"sae_7489": "The king is on the target square and is attacked by exactly one enemy piece.",
"sae_7463": "A square is attacked by at least two enemy pieces, and by at most one friendly piece.",
"sae_7462": "A target square that is attacked by White and more heavily attacked by Black, with White having only one attacker.",
"sae_7485": "A white pawn on the 4th rank is attacked by exactly one white piece and zero black pieces.",
"sae_7247": "Detects a king (of either color) that is attacked by a queen or rook, but not by a knight, and is not attacked by any other pieces.",
"sae_7384": "White's knight on f3 attacks h6, which is also attacked by a black pawn on g7, with the white king castled kingside.",
"sae_7483": "A white knight on a semi-central square that is defended by multiple white pieces, often in a contested central structure.",
"sae_7494": "A piece is attacked by an enemy piece and defended by one friendly piece, with the attacking piece being a knight or rook.",
"sae_7506": "White attacks an empty square that is also attacked by at least two black pieces, with the target square being on the 6th rank.",
"sae_7497": "White's rook attacks a black rook on the 6th or 7th rank, which is also defended by another black piece.",
"sae_7531": "A white queen is attacked by at least one white piece, and not attacked by any black pieces.",
"sae_7507": "A knight on the 5th or 6th rank that is attacked by at least one enemy piece.",
"sae_7501": "Rook near the king in an endgame, typically on the 2nd or 7th rank, coordinating with the king to control files or support the king's march.",
"sae_7536": "White pawn on its original square (2nd rank) is attacked by one black piece and defended by one white piece.",
"sae_7568": "A white queen on the 2nd or 3rd rank, attacked by at least two white pieces and zero black pieces.",
"sae_7577": "Black queen on d8 attacked by two black pieces, with no white attackers.",
"sae_7535": "A white piece attacks a target square that is also attacked by multiple black pieces, with the target square often being a pawn or empty.",
"sae_7574": "Detects a white piece attacking a black piece on a square where the black piece is either undefended or defended by an equal number of black pieces.",
"sae_7537": "Detects an empty square on the 8th rank that is not attacked by white, with a white queen on the same rank or file as the target square.",
"sae_7588": "A white piece (queen or rook) is attacked by a white piece on its starting square (d1, f1, g2, e4) or a square it has moved to (f3).",
"sae_7612": "A white bishop on a light square, attacked by one black piece and defended by one white piece.",
"sae_7580": "A white pawn on the 2nd, 3rd, or 4th rank that is attacked by a black piece and defended by at least one white piece.",
"sae_7601": "A white piece attacks a black bishop on a dark square, where the bishop is not defended.",
"sae_7585": "A black bishop is on the edge of the board (a1, a8, h1, h8, or a-file, h-file, 1st rank, 8th rank) and is not attacked by white pieces.",
"sae_7628": "Detects a king on the 6th or 7th rank that is attacked by an enemy piece.",
"sae_7623": "A black queen on f3, f4, or g3, with no white or black attackers, and white to move.",
"sae_7590": "Detects a pawn on the 3rd or 4th rank that is attacked by at least one enemy piece and is undefended by friendly pieces.",
"sae_7614": "Detects an empty square attacked by exactly one white piece, where the attacking piece is a queen.",
"sae_7644": "A black pawn on a7, especially when undefended or attacked by white.",
"sae_7626": "A pawn on the 7th rank (for white) or 2nd rank (for black) that is attacked by an opponent's piece and defended by one of its own pieces.",
"sae_7663": "Detects a square attacked by at least one white piece and at least two black pieces, with white having fewer attackers than black.",
"sae_7678": "A black bishop on a light square, attacked by at least one black piece, and potentially attacked by a white piece.",
"sae_7552": "A white rook or queen on the first two ranks is attacked by exactly one white piece, with no black attackers.",
"sae_7683": "A white bishop is attacked by at least one black piece and defended by exactly one white piece.",
"sae_7643": "A black queen or rook is on the first rank, and the white king is on the first rank, with no white pieces attacking the target square.",
"sae_7713": "A white piece is attacked by one black piece and defended by one or two white pieces, with the target piece being a Knight or Rook.",
"sae_7674": "A white rook or queen attacks a black piece on the 7th or 8th rank, with no white attackers on the target square.",
"sae_7726": "A square is attacked by one white piece and one black piece, with the target square often being a pawn.",
"sae_7714": "The target square is attacked by a black piece, and is on the 8th rank, with a white pawn on the 7th rank on the same file.",
"sae_7755": "A contested square on the 5th or 6th rank, attacked by at least one pawn from the attacking side.",
"sae_7711": "White knight attacks a square with no black pieces, preferably on the 6th rank, and often with other white pieces also attacking the square.",
"sae_7729": "White pawn on b2 or b3 attacks c4, which is either undefended or defended by a single black piece.",
"sae_7734": "Detects an undefended square on the back rank (7th or 8th) that is attacked by at least one black piece, often the king's castling square.",
"sae_7765": "Detects a Queen on the 7th or 8th rank, not attacked by either side, and the side to move is White.",
"sae_7814": "White's rook on f1 is attacked by at least two white pieces, with no black attackers.",
"sae_7803": "A queen is attacked by an enemy piece, and the queen is on a square where it can be captured.",
"sae_7720": "A white pawn on the 6th rank (for white) or 3rd rank (for black) that can advance to an empty square on the 7th/2nd rank, respectively, and is not attacked by an enemy piece.",
"sae_7785": "A white pawn on the 2nd rank (b2, c2, g2) that is attacked by exactly one white piece and not attacked by any black pieces.",
"sae_7851": "Detects an empty square on the first rank that is attacked by a white rook.",
"sae_7751": "An exposed king is under pressure from multiple pieces, often requiring a defensive or deflecting move.",
"sae_7820": "The black king is on a square attacked by at least one black piece, and not attacked by any white pieces.",
"sae_7794": "The feature detects a target square on the a- or h-file, on the 4th or 5th rank, that is undefended by white and either undefended or attacked by one black piece.",
"sae_7850": "Detects pawn endgame positions with multiple advanced passed or candidate passed pawns on both sides, often involving zugzwang.",
"sae_7745": "Detects a pawn on the 6th rank (for white) or 3rd rank (for black) that is attacked by an enemy pawn and can be captured en passant.",
"sae_7936": "White attacks the f7 pawn, which is defended by at least one black piece, often the king.",
"sae_7947": "White's king-side rook on f1 is attacked by one black piece and defended by at least one white piece, with white to move.",
"sae_7930": "A black piece on a contested square where black retains at least partial control.",
"sae_7667": "Detects a black piece (N or B) on a central square (d4, d5, e4, e5) or near the center (b5, f4, f6) that is attacked by at least one black piece and zero white pieces.",
"sae_7962": "A bishop on a long diagonal (a1-h8 or h1-a8) attacking a square on the same diagonal.",
"sae_7871": "King on the target square is attacked by an enemy piece, and the king is not defended by a friendly piece.",
"sae_7970": "A black pawn on g7 (or a8) is attacked by a white queen, with no white pieces defending the pawn.",
"sae_7953": "An advanced passed pawn close to promotion in an endgame, with both sides manoeuvring to support or stop it.",
"sae_7929": "This feature detects a black bishop attacked once by white, and defended once by black.",
"sae_7933": "A queen or rook is on a square, and the king of the same color is on an adjacent square, with no pieces of the same color between them.",
"sae_7996": "A queen is attacked by an enemy piece and is not defended by a friendly piece.",
"sae_7974": "King on its starting square (e1 or g1) or h2/g2, attacked by one black piece and defended by one or two white pieces.",
"sae_7954": "White's King's Rook is on its starting square (h1) and has not moved, with no pieces directly attacking it.",
"sae_8009": "A square is attacked by one white piece and one black piece, and the target square is on the 2nd or 3rd rank.",
"sae_7992": "A pawn on the 6th rank (for white) or 3rd rank (for black) that is attacked by an opponent's piece and not defended by a friendly piece.",
"sae_8000": "Detects a square attacked by at least one black piece and not attacked by any white piece, where the target square is empty.",
"sae_7841": "Pawn on the 2nd rank (for the side to move) that is attacked by an enemy piece and defended by a friendly piece.",
"sae_8018": "Detects a white pawn on the 2nd rank that can advance to the 3rd rank, where it is attacked by exactly one white piece and no black pieces.",
"sae_8024": "A white rook on its original square (c1, e1, or f1) is attacked by one black piece and defended by two white pieces.",
"sae_7680": "A square is attacked by multiple black pieces and no white pieces, with the target square often being on the 5th, 6th, or 7th rank.",
"sae_8033": "Black knight on an outer-rank square, defended by at least one black piece.",
"sae_8027": "The king is on the 2nd, 3rd, or 4th rank, and there are no enemy pieces attacking it.",
"sae_8007": "A white pawn on the 4th or 5th rank that is attacked by more black pieces than white pieces.",
"sae_7854": "A rook on its starting square (or a square it could have started on) that is attacked by an enemy piece.",
"sae_8083": "A white pawn on the 3rd, 4th, or 5th rank, attacked by no black pieces, and attacked by 0 or 1 white pieces.",
"sae_8064": "Detects a bishop on the second rank that is attacked by one black piece and defended by one or two white pieces.",
"sae_8109": "A black rook on the back rank (rank 8 for black, rank 1 for white) that is attacked by a white pawn.",
"sae_8084": "This feature detects a King on the back rank (rank 1 or 8) that is attacked by exactly one enemy piece.",
"sae_8082": "A white queen is attacked by one black piece and defended by one or two white pieces.",
"sae_8110": "Detects a black pawn on g7, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_8130": "The feature detects the e7 square being heavily attacked by black pieces, with no white defenders, often with a black pawn on d6 or f6.",
"sae_8127": "A queen is attacked by at least one friendly piece and no enemy pieces.",
"sae_8122": "Detects king and pawn structures in pawn endgames where the king supports a passed or advanced pawn from close proximity.",
"sae_8118": "The feature detects a central square (d4 or c4) that is attacked by at least two black pieces, and is either undefended or defended by fewer white pieces than black attackers.",
"sae_8123": "A queen on the 4th rank (a4, b4, c3, d5, g4) that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_8114": "Detects a king-side attack on g7/h7 where the target square is attacked by one white piece and defended by one black piece, often with a queen or rook involved in the attack.",
"sae_8153": "Detects a queen attacking an empty square on the 7th or 8th rank, or a square adjacent to the enemy king, with no black defenders.",
"sae_8057": "Detects a black knight on a central square (d5, e5, f5, c5, f6) that is attacked by multiple black pieces and zero or one white pieces, indicating a strong outpost or a well-defended piece.",
"sae_8098": "A square on the 6th or 7th rank is attacked by at least two white pieces and defended by at most one black piece.",
"sae_8180": "Detects a black pawn on the 4th or 5th rank on the h-file, attacked by at least one black piece and not attacked by any white pieces.",
"sae_8138": "A black queen on the first rank (or second rank for black) that is not attacked by white pieces.",
"sae_8177": "The feature detects squares attacked by 3-4 white pieces and 1 black piece, often on the 4th or 5th rank, with the target square being empty.",
"sae_8154": "White bishop attacks a square, often on the edge of the board, with no or few black defenders.",
"sae_8173": "Detects a square on the 6th rank (for white) that is attacked by white and more heavily attacked by black.",
"sae_8169": "A square on the back rank is attacked by at least two pieces of the side to move, and at most one piece of the opponent.",
"sae_8184": "White's queen or bishop attacks the h7 pawn, which is defended by a black knight and/or king.",
"sae_8183": "White bishop on c1 attacked by at least two white pieces and zero black pieces.",
"sae_8251": "The feature activates when the king is on an edge square and is not attacked, or when a square is attacked by one white piece and one black piece.",
"sae_8206": "White pawn on f2/h2/h4 attacked by Black, defended by White, with a White Bishop on the a1-h8 diagonal.",
"sae_8211": "Pawn on rank 2 or 3 under attack with minimal defence, in complex rook endgames.",
"sae_8252": "The feature detects a pawn on the 7th rank that is not attacked by the opponent, especially when the king is nearby.",
"sae_8225": "A white piece attacks a black pawn on the 6th or 7th rank, which is either undefended or defended by one black piece.",
"sae_8209": "Detects an undefended empty square on the 6th or 7th rank that is attacked by multiple black pieces.",
"sae_8273": "A black pawn on the 4th rank is attacked by a black king, and is not attacked by any white pieces.",
"sae_8233": "A pawn on the 3rd or 4th rank (from its side) that is attacked by a friendly piece and not attacked by an enemy piece.",
"sae_8256": "A white queen is attacking a black queen, which is also attacked by a black piece, and the white queen is the only white attacker.",
"sae_8286": "A white piece attacks a black piece on a square, and that square is also attacked by a black piece.",
"sae_8329": "A black pawn on the 4th rank supported by another black pawn, with no white pawn directly attacking it.",
"sae_8274": "A queen on the 8th rank, attacked by a rook on the same rank, with the king on the 7th rank.",
"sae_8295": "The feature detects a friendly knight on its starting square (b1 or g1) that is attacked by at least one friendly piece and not attacked by any enemy pieces.",
"sae_8308": "The feature detects an undefended h8 square that is attacked by at least one black piece, with the white king on g1 or h1.",
"sae_8296": "Detects a black rook on the first two ranks, especially when it is on the same file as the white king or is attacked by white pieces.",
"sae_8316": "Detects a knight on the 5th or 6th rank that is not attacked by white pieces.",
"sae_8387": "A pawn on the 5th or 6th rank is attacked by at least two enemy pieces and defended by at most one friendly piece.",
"sae_8337": "Detects a square on the 7th or 8th rank that is attacked by a black pawn and either attacked by a white piece or undefended by white.",
"sae_8335": "The feature detects a pawn on the d2 square (for white) or d7 square (for black) that is attacked by at least 3 friendly pieces and not attacked by any enemy pieces, or a bishop on c1/c8 that is attacked by one friendly piece and one enemy piece.",
"sae_8404": "Detects a king on a light square, with no white attackers and few black attackers, often on the 6th or 7th rank, suggesting a potential target for attack.",
"sae_8246": "This feature detects a pawn on a central square (d4, e5, f4, f5) that is attacked by one black piece and attacked by at least one white piece, with white having a net attack advantage of at least one.",
"sae_8416": "Detects squares attacked by at least one black piece, with no white attackers, where the target square is empty.",
"sae_8343": "The feature detects a pawn on the 2nd rank (for the side to move) that is attacked by an enemy pawn and defended by a friendly pawn, with the target square being the square in front of the friendly pawn.",
"sae_8440": "Detects squares on the 8th rank that are attacked by a black piece and not attacked by a white piece.",
"sae_8417": "Detects a black knight on the opponent's back rank (1st or 8th) that is not attacked by white pieces.",
"sae_8390": "The feature detects a knight on a central square (c3, c4, f3, f5) that is attacked by one more white piece than black pieces, with white to move.",
"sae_8338": "White knight on b5 (or d5/f3) is attacked by 0-1 black pieces and defended by 2-3 white pieces.",
"sae_8289": "Detects a king on the 7th or 8th rank that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_8434": "A queen or rook is on the first or second rank, attacked by one friendly piece, and not attacked by any enemy pieces.",
"sae_8425": "The feature detects an empty square on the 8th rank that is not attacked by black pieces, and where a white pawn can promote.",
"sae_8389": "A white knight on f3, attacked only by white pieces, often by a pawn on e4 or g4, and a bishop on c4 or d3.",
"sae_8378": "White bishop on b2 attacking a3, where a black pawn is on a4, and the white king is on c3.",
"sae_8431": "The feature detects a square on the 6th rank that is attacked by the opponent's pieces, with the side to move having fewer or equal attackers on that square.",
"sae_8489": "A white queen or rook attacks a square on the first or second rank, with no black attackers.",
"sae_8376": "The feature detects a vacant square on the back rank (e8, f8, or h8) that is attacked by at least one black piece and is either undefended or defended by only one white piece.",
"sae_8441": "The feature activates when white attacks a square on the 6th or 7th rank, especially if it's a pawn or knight, and the square is attacked by black.",
"sae_8481": "The feature detects squares on the 8th rank that are attacked by black pieces and are empty, especially when the king is on the 8th rank.",
"sae_8421": "A white bishop is attacked by one or two black pieces, and defended by one white piece, on a central square (c3, c4, d2, d3, e3, e6).",
"sae_8477": "A square attacked by multiple black pieces, especially if it's on the 4th or 5th rank, and is either undefended or lightly defended by white.",
"sae_8556": "The feature detects an undefended black pawn on g7, with the black king castled kingside, and no white attackers on g7.",
"sae_8531": "A white pawn on the 2nd or 3rd rank, attacked by a white piece, with the white king nearby.",
"sae_8535": "Detects a white bishop on a central square (d2, d4, e2, e6, h6) that is attacked by at least one black piece, often with white having more attackers.",
"sae_8519": "A king-side castling square (g1, h2, e2, d2, c1) that is empty and attacked by at least one white piece, with no black attackers.",
"sae_8580": "A white rook on its starting square (f1, e1, d1, c1) is attacked by one black piece and defended by at least two white pieces, with white to move.",
"sae_8443": "A white bishop on a central square (d4, e4, d5, e5) or a square on the 5th rank (a5-h5) that is attacked by at least one white piece and at least one black piece.",
"sae_8592": "A black bishop that is active or under pressure in a tactical position, often near the centre or kingside.",
"sae_8552": "The feature detects the h8 square being attacked by at least one black piece, with no white attackers, often with a black knight on f6 and a black bishop on g7, and a black king on g8.",
"sae_8554": "White pawn on the 7th rank, one square away from a promotion square on the 8th rank, with no immediate threats to the pawn or the promotion square.",
"sae_8640": "A black pawn on the 7th rank (or 6th rank for black's perspective) that is not attacked by white pieces and is blocking a white pawn.",
"sae_8655": "Detects an empty square on the first rank that is attacked by a white bishop and is adjacent to the white king.",
"sae_8593": "A black queen on the 7th rank, attacked by 0-2 black pieces and 0 white pieces.",
"sae_8606": "White attacks a square on the 7th or 8th rank that is defended by black, often with a queen involved in the attack.",
"sae_8717": "A rook on the first rank, on the same side as the king, is attacked by a friendly piece.",
"sae_8631": "A square is attacked by white, with no black attackers, and is on the same rank or file as the white queen.",
"sae_8518": "White pawn on h2 attacked by one white piece (usually a bishop on b7-g2 diagonal or a knight on f3) and no black pieces.",
"sae_8710": "Black king on the 7th rank (or 6th rank in one case) is attacked by at least one black piece, but not by any white pieces.",
"sae_8683": "Detects a black bishop on the first two ranks, especially when it's on a corner square (a1, h1, a2, h2) and not attacked by white.",
"sae_8737": "A white bishop on its starting square (c1 or f1) is attacked by 0-1 black pieces and defended by 1-3 white pieces.",
"sae_8615": "Rook endgame with a king-centralisation or fork motif, often with mutual pawn weaknesses and active king play.",
"sae_8762": "A pawn on the h-file is attacked by one black piece and defended by one or two white pieces.",
"sae_8731": "Detects a pawn on the 7th rank (for white) or 2nd rank (for black) that is one square away from promotion, with the target square being the promotion square.",
"sae_8591": "This feature detects a piece (N or B) on the target square that is attacked by at least one opponent's piece and not defended by any friendly pieces.",
"sae_8753": "White pawn on the h-file is attacked by at least one white piece and not attacked by any black pieces.",
"sae_8771": "A white pawn on the a-file is attacked by a white pawn on the b-file, with no black attackers.",
"sae_8752": "Detects a black king on the back rank (7th or 8th) or a square adjacent to it, with the target square being g8 or h7, and the target square is attacked by a black piece.",
"sae_8708": "Detects a black bishop on a central square (d4, d5, e4, f4) or h2, attacked by at least one white piece, and defended by at most two black pieces.",
"sae_8773": "A white piece (N, Q, R) is attacked by one black piece and defended by one white piece on the 3rd rank (c3, f3, g3).",
"sae_8818": "Detects a square attacked by exactly one black piece, with no white attackers, where the square is on the 3rd or 4th rank and is not occupied.",
"sae_8839": "Black king on the back rank, attacked by at least two black pieces, with no white attackers.",
"sae_8803": "The feature detects a black bishop on c8, which is the target square, with white having 0 or 1 attackers and black having 1 to 3 attackers.",
"sae_8810": "The feature detects a white pawn on the 6th rank, attacking a square on the 7th rank, with no black pieces on the target square.",
"sae_8781": "The feature detects a pawn on the a-file (a5 or a6) that is attacked by at least one black piece and is either undefended or defended by fewer white pieces than black attackers.",
"sae_8678": "White's pawn on the 5th rank attacks a square on the 6th rank that is attacked by at least two black pieces.",
"sae_8809": "The feature detects a white rook on the first rank attacking an empty square on the same rank, which is also attacked by a black rook.",
"sae_8862": "A pawn on the 7th rank (for white) or 2nd rank (for black) that is not attacked by the opponent.",
"sae_8711": "Detects a black king on the kingside (g8/h8) with a pawn on f7 and no white attackers on g7/h7, indicating a potential kingside attack or weakness for Black.",
"sae_8834": "Detects an undefended square on the back rank (rank 8 for white, rank 1 for black) that is attacked by multiple enemy pieces.",
"sae_8872": "The feature detects an empty square on the second rank (for white) that is attacked by at least one white piece and no black pieces, often with a pawn on the d-file.",
"sae_8798": "A white piece attacks a black knight, which is the only piece on the target square.",
"sae_8890": "Detects a black rook on its starting square (a8 or f8) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_8894": "A white bishop on a light square is attacked by one black piece and defended by at least one white piece.",
"sae_8879": "A white piece attacks a black queen, which is the only piece on its square, and the queen is not attacked by more than one black piece.",
"sae_8874": "Detects a white piece (Rook or Knight) on a square attacked by at least one black piece, where white has fewer attackers than black.",
"sae_8929": "A white rook attacks a black rook on the 2nd or 7th rank.",
"sae_8892": "Detects a white pawn on the 4th or 5th rank, with no black attackers, and often with a black pawn on an adjacent file on the same rank.",
"sae_8901": "The feature detects an empty square on the first rank, which is not attacked by white, and is on the same file as the white king.",
"sae_8903": "This feature detects a pawn on the 5th rank (for white) or 4th rank (for black) that is under attack by at least one enemy piece.",
"sae_8935": "White's Queen attacks c2, which is undefended by Black, and there are no pieces on c2.",
"sae_8876": "White's pawn on a-file (a6 or a7) is attacked by black pieces, and white has at least one attacker.",
"sae_8990": "A white pawn on the b-file is attacked by a black pawn on the a-file.",
"sae_8902": "The feature detects the f8 square being attacked by at least two black pieces, with no white pieces attacking it, and the white king is on the kingside.",
"sae_8893": "A knight on c3 or f3 that is attacked by one black piece and defended by one or two white pieces.",
"sae_8964": "White attacks a square on the 6th rank with one piece, while Black attacks it with multiple pieces.",
"sae_8992": "White King on e1, attacked by no black pieces, and defended by at least two white pieces.",
"sae_8979": "This feature detects a black bishop that is attacked by white, with white having fewer attackers than black, and the bishop is on a square where it is attacked by a white piece.",
"sae_8965": "The feature detects a king on the back rank, with a friendly rook on the same rank, and an enemy piece attacking the square between them.",
"sae_8945": "King facing a positional queen threat requiring an immediate defensive queen move.",
"sae_9009": "Detects a black pawn on h7, attacked by at least one black piece, and not attacked by white.",
"sae_8953": "A square on the 6th rank is attacked by at least one black piece and not attacked by any white pieces.",
"sae_9015": "The feature detects a pawn on d6 or c6 that is attacked by at least one black piece, and is either undefended by white or defended by at most one white piece.",
"sae_9030": "Detects a king on the same rank or file as a rook or queen, with the target square being a square on that rank/file between the king and the rook/queen.",
"sae_9036": "The f8 square is attacked by multiple black pieces, with no white defenders, and the white king is on the back rank.",
"sae_9004": "A white pawn on c5 or e5 attacks an empty d6 square, which is also attacked by another white piece, with no more than one black attacker.",
"sae_9042": "The feature detects a square on the first rank that is attacked by at least one black piece and is either empty or occupied by a black rook.",
"sae_9096": "A white rook attacks an empty square on the back rank, with no black pieces attacking that square.",
"sae_8961": "This feature detects a pawn on the 4th rank (for white) or 5th rank (for black) that is attacked by at least one enemy piece and defended by at least one friendly piece, with the side to move being the one whose pawn is on the 4th rank.",
"sae_9049": "Passed pawn endgame with king opposition and advanced pawns racing to promote.",
"sae_9098": "Tactical positions featuring knight vulnerability or knight-based mating patterns, with a knight under pressure from opposing forces.",
"sae_9087": "White piece attacks a black bishop on its starting square (a1, g2, e1) or a square it has moved to (a1, g2, e1).",
"sae_9065": "A white pawn on the 2nd rank is attacking an empty square on the 3rd rank, which is also attacked by at least one other white piece and at most one black piece.",
"sae_9088": "White's queen or bishop attacks h7, which is defended by a black piece, often a pawn, with the black king nearby.",
"sae_9044": "A black piece (bishop or knight) attacks a square on the 7th or 8th rank, which is either undefended by white or defended by a white piece that is also attacked by a black piece.",
"sae_9102": "A queen on the b-file or c-file, attacking a square on the back rank, with a bishop on the b-file or c-file, and a rook on the same rank as the king.",
"sae_9046": "A white bishop on b5 or g5, attacked by a black piece, with white having 0 or 1 attacker on the bishop.",
"sae_9051": "The feature detects a king on the first rank, especially in a corner, with no immediate attackers, and often with a rook on the same rank or an adjacent file.",
"sae_9112": "A white-controlled square on the 3rd rank, attacked by at least 2 white pieces and at most 1 black piece, often a pawn.",
"sae_9170": "Detects a black rook on a8, attacked by black pieces, with no white attackers.",
"sae_9134": "The feature activates when a white piece (especially a Bishop or Rook) is on a square where it is attacked by 0 black pieces and attacked by 0-2 white pieces, often on the 4th or 5th rank, or on the h-file.",
"sae_9212": "A square is attacked by exactly one white piece and at least two black pieces, with the target square being empty.",
"sae_9185": "White queen on a semi-open file or central square in a contested middlegame position, with active black counterplay.",
"sae_9113": "A pawn on the 7th rank (for white) or 2nd rank (for black) that is one square away from promotion, with the king of the same color on the 8th rank (for white) or 1st rank (for black) and the king of the opposite color on the 6th rank (for white) or 3rd rank (for black",
"sae_9149": "A rook is actively placed on a key rank or file where it creates immediate tactical threats, often involving back-rank or invasion motifs.",
"sae_9178": "Detects an undefended black pawn on the 7th rank, especially on b7, that is attacked by a black piece.",
"sae_9206": "A square is attacked by multiple black pieces, with no white attackers or only one white attacker.",
"sae_9176": "This feature detects a black knight on the 5th, 6th, or 7th rank that is either undefended or defended by black but attacked by white.",
"sae_9181": "Detects an empty square on the first rank (c1 or g1) that is attacked by at least one white piece and not attacked by any black pieces, often a king-side or queen-side castling square.",
"sae_9213": "Detects a knight on the opponent's side of the board, especially when it is undefended or attacked by the opponent.",
"sae_9091": "The feature detects squares on the back rank that are attacked by a black rook, especially if the king is also on the back rank.",
"sae_9205": "White is attacking a central square (d5, e5, f6, c5) with multiple pieces, often outnumbering black's defenders.",
"sae_9188": "This feature detects a pawn on the 6th rank (for white) or 3rd rank (for black) that is attacked by at least one friendly piece and at least two enemy pieces, indicating a potential pawn weakness or target.",
"sae_9217": "A back-rank square dominated by the attacking side's pieces (2+) with no defence, enabling back-rank mate or decisive infiltration.",
"sae_9190": "White rook attacking a square on the 6th, 7th, or 8th rank, often with a white pawn nearby.",
"sae_9218": "A white pawn on the h-file is attacked by a white piece, or a white pawn on the h-file is attacked by a white piece and the white king is on the h-file.",
"sae_9273": "A pawn on the 4th or 5th rank that is attacked by at least one enemy piece and defended by at least one friendly piece.",
"sae_9073": "Detects a rook on its starting square (a1, h1, a8, h8) with no immediate attackers or defenders.",
"sae_9293": "A white knight on the first rank is attacked by at least one white piece and not attacked by any black pieces.",
"sae_9251": "The feature detects a white piece attacking an empty square on the 8th rank, especially a corner square like a8 or h8, often with a queen or rook.",
"sae_9253": "Detects a black rook on the back rank (7th or 8th) that is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_9263": "This feature detects a white pawn on the 2nd, 3rd, or 4th rank that is attacked by a black piece and either undefended or defended by one white piece.",
"sae_9242": "White rook on the 3rd rank, attacking a black rook on the 1st rank, with no other pieces attacking or defending the target square.",
"sae_9271": "Black king in an open, active position with no immediate white attackers, regardless of square colour or rank.",
"sae_9221": "Detects a king on a square attacked by at least two enemy pieces, or a pawn on f2/f5 attacked by at least one enemy piece and defended by at least one friendly piece.",
"sae_9230": "Detects a black rook on h8, with the black king on g8, and a white queen attacking h8, often with a white rook on the h-file.",
"sae_9295": "Detects a king on the 4th, 5th, or 6th rank, with no direct attacks from either side.",
"sae_9219": "Detects an undefended enemy piece (Bishop or Knight) on a square that is attacked by at least one enemy piece.",
"sae_9285": "The feature detects a king on a square that is not attacked by any piece, with at least one friendly rook on the same rank or file as the king.",
"sae_9345": "White knight on g1, attacked by at least one white piece, and not attacked by any black pieces.",
"sae_9342": "Detects contested pawn endgame positions where an advanced pawn (either colour) on the 4th\u20136th rank is under pressure, often in zugzwang or deflection themes.",
"sae_9277": "A white piece attacks a black piece on a central square (e4, e6, f6) or b7, with the black piece being attacked by at least one other black piece.",
"sae_9368": "A square is attacked by white and defended by black, with white having at least one more attacker than black, and the square is on the first rank for white.",
"sae_9309": "The feature detects a square attacked by one white piece and one black piece, where the target square is on the second rank for white or the seventh rank for black (or the equivalent for the side to move).",
"sae_9371": "Rook operating on an open file or rank as the key piece in a mating attack or decisive combinational sequence, including arabianMate and x-ray attack patterns.",
"sae_9356": "Detects the h8 square being attacked by exactly two black pieces, with no white pieces attacking h8.",
"sae_9373": "Detects squares on the first two ranks that are attacked by a white pawn, especially when the white king is nearby.",
"sae_9388": "A pawn on the second rank is attacked by an enemy piece and defended by a friendly piece, with the attacking piece being a queen or rook.",
"sae_9393": "White King is on the same rank or file as the black King, with no pieces in between.",
"sae_9363": "A white pawn on the 4th rank (d4, e4, f4, g4) that is attacked by at least one black piece and defended by at least one white piece.",
"sae_9389": "White's king-side rook is attacked by at least two white pieces, and the target square is on the first rank, usually g1 or f1.",
"sae_9403": "A white pawn on the 7th rank (or 6th rank with a clear path) that can promote to a queen on the 8th rank, with the black king nearby.",
"sae_9410": "The feature detects an empty square on the first rank that is not attacked by the side to move, but is attacked by an enemy rook or queen.",
"sae_9433": "A bishop pair or lone bishop involved in a mating attack or decisive diagonal control, often on a long diagonal.",
"sae_9409": "Detects an undefended square on the 3rd rank (a3 or b3) attacked by at least one black piece, where the attacking piece is a bishop.",
"sae_9436": "A white queen on a central or advanced square, often undefended or lightly defended, and sometimes under attack.",
"sae_9444": "An empty square on the 5th rank (for white) or 4th rank (for black) that is attacked by at least one enemy piece and not attacked by any friendly pieces.",
"sae_9445": "A white rook on the first or second rank is attacked by at least one white piece and not attacked by any black pieces.",
"sae_9472": "White's king-side rook (R) is attacked by an enemy piece, but the h1 square is defended by at least one white piece.",
"sae_9473": "A rook on its starting square (e1, d1, g1) that is not attacked by the opponent and is the only piece attacking that square.",
"sae_9535": "A white rook on the a-file attacks an empty square on the a-file.",
"sae_9527": "A black rook on the 8th rank, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_9348": "A white piece attacks a black pawn on the 6th or 7th rank, which is also attacked by at least one black piece.",
"sae_9505": "Detects a black knight on b8, attacked by black pieces, and not attacked by white pieces.",
"sae_9533": "The feature detects a black pawn on the 4th rank (for white) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_9471": "White's king is on e1 and can castle kingside (g1 is empty, f1 is empty, and h1 is occupied by a rook).",
"sae_9503": "A square on the a-file or 1st/2nd rank is attacked by at least one black rook, and white has no defenders.",
"sae_9545": "Detects the g8 square being attacked by a black piece, with the black king on g8, and no white pieces attacking g8.",
"sae_9573": "The feature detects a square attacked by exactly one white rook and exactly one black rook, where the target square is empty.",
"sae_9536": "Pawn on a light square, on the 2nd, 3rd, or 4th rank, with no white attackers and no black attackers, and a black king nearby.",
"sae_9467": "Black bishop infiltrated to the 2nd rank (a2 or h2 area) as part of a double-bishop back-rank mating pattern.",
"sae_9560": "A white pawn on the 6th or 7th rank is attacked by a white piece and not attacked by a black piece.",
"sae_9593": "White knight on an active central or kingside square involved in a smothered mate or mating net pattern.",
"sae_9485": "The feature activates when the king is on the back rank, and the target square is an empty square on the opposite side of the board, also on the back rank.",
"sae_9613": "A pawn on the 2nd or 3rd rank of the side to move, attacked by at least one friendly piece and not attacked by any enemy pieces.",
"sae_9544": "A king on the back rank or 2nd rank under back-rank pressure, requiring an immediate defensive move.",
"sae_9605": "The feature detects a white knight on d2 or d3, attacked by at least one white piece and zero black pieces, often with a pawn on d4.",
"sae_9548": "The feature detects a king on the back rank (7th or 8th) that is not attacked by the opponent, but is vulnerable to a back-rank mate if the opponent's rook or queen moves to that rank.",
"sae_9585": "Detects a pawn on the 3rd or 4th rank in a king-and-pawn endgame that is under pressure or structurally weak relative to the enemy king's position.",
"sae_9643": "White King on g1 or h1, with no black attackers, and a white Rook on f1, g1, or h1, or a white Bishop on f1 or g1, or a white Queen on f1, g1, or h1.",
"sae_9607": "A contested central square on ranks 3-5 that is attacked by at least one enemy piece and defended by at least one friendly piece, in positions requiring precise tactical calculation.",
"sae_9706": "Detects a pawn on the 6th or 7th rank that is attacked by one white piece and defended by multiple black pieces.",
"sae_9691": "The feature detects a black bishop on f8, attacked by at least two black pieces, with no white attackers.",
"sae_9696": "A queen is attacked by an equal or greater number of opponent pieces, and is also attacked by at least one friendly piece.",
"sae_9674": "The target square is on the 8th rank, attacked by a black pawn on the 7th rank, and is not attacked by any white pieces.",
"sae_9654": "A pawn on the 2nd or 3rd rank that is attacked by at least one enemy piece and defended by at least one friendly piece, with the side to move being the one whose pawn it is.",
"sae_9662": "A white bishop is attacked by one black piece and defended by at least one white piece, with the bishop being on a light square.",
"sae_9583": "White king is on the 7th or 8th rank, and the target square is on the same rank or an adjacent rank, with no black attackers.",
"sae_9664": "A bishop on a long diagonal (a1-h8 or h1-a8) attacking a square on the 7th or 8th rank that is undefended by white.",
"sae_9729": "White rook on the back rank exposed to a pin or deflection tactic by a black queen or bishop.",
"sae_9715": "Detects squares on the first rank that are empty and not attacked by the opponent, often for king safety or rook development.",
"sae_9716": "A knight on a central square (c3, c4, e2, e4, f3) that is attacked by at least one enemy piece and defended by at least one friendly piece.",
"sae_9763": "A white piece attacks a black queen on a square that is also attacked by a black piece.",
"sae_9754": "A white piece attacks a square on the 7th or 8th rank that is also attacked by a black piece, with the white king nearby.",
"sae_9711": "A white pawn on the 5th rank attacks an empty square on the 6th rank, or a white pawn on the 6th rank attacks an empty square on the 7th rank, or a white pawn on the 7th rank attacks a black pawn on the 7th rank.",
"sae_9774": "The feature detects a pawn on the a-file that is either undefended or defended by only one black piece, and is attacked by no white pieces.",
"sae_9744": "The feature detects a pawn on the second rank, with the king on the first rank, and the target square is the corner square on the first rank.",
"sae_9757": "White's pawn on b2 or b3 is attacked by a black pawn on a4 or b4, and white can recapture with a pawn or knight.",
"sae_9777": "A pawn on the second rank (a2 or h2) that is not attacked by either side, with the king nearby.",
"sae_9842": "The feature detects a rook on its starting square, on the back rank, with no pieces directly in front of it.",
"sae_9785": "White's knight attacks a square on the 3rd rank, which is either undefended or defended by a black pawn.",
"sae_9748": "The feature detects a pawn on the second rank that is attacked by exactly one enemy piece and defended by exactly one friendly piece.",
"sae_9780": "The feature detects a king on the back rank, with a rook or queen on the same rank, and a knight or pawn on the second rank, blocking the king's escape.",
"sae_9854": "The white queen is actively placed to threaten a decisive penetration or mating attack, often targeting the back rank or a weak square near the black king.",
"sae_9893": "White attacks a black pawn on the 6th rank, which is also attacked by at least one black piece.",
"sae_9844": "A white rook on its starting square (f1 or b1) is attacked by a white piece, with no black attackers.",
"sae_9813": "A square on the 5th or 6th rank that is attacked by the opponent and defended by at most one of the player's pieces.",
"sae_9882": "A square on the 6th rank is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_9856": "White king is on the 7th or 8th rank, and the target square is on the 8th rank, with no black pieces attacking it.",
"sae_9740": "The feature detects a pawn on the 7th rank that is not attacked by the opponent and is not defended by the side to move.",
"sae_9686": "White's knight on c3 or d4 attacks a black piece (often a bishop or knight) on e7 or f6, which is also attacked by another white piece and defended by at least one black piece.",
"sae_9883": "A white rook on its starting square (a1 or h1) that is currently undefended by white pieces and unattacked by black pieces.",
"sae_9925": "A bishop on a square that is attacked by at least one enemy piece.",
"sae_9869": "A rook on the back rank (1st or 8th) of its own color, with a pawn on the adjacent square (b-file for a8/h8, g-file for a8/h8, or a-file for a7/h7) and no other pieces between them.",
"sae_9917": "A pawn on the 4th rank (a4 or h4/h5) that is undefended by the opponent and either undefended or defended by one friendly piece.",
"sae_9927": "A white pawn on the 4th rank, attacked by a white pawn on the 3rd rank, with no black attackers.",
"sae_9879": "Detects a square attacked by a white rook and a black piece, where the rook is on the same rank or file as the target square.",
"sae_9926": "Pawn endgame with king opposition or zugzwang, where king proximity to key pawn squares determines the outcome.",
"sae_9930": "A queen on the same rank or file as the king, with the target square on the same rank/file, and the king is not on the target square.",
"sae_9799": "Detects a black king on h8 or g8, with the h7 square attacked by black and undefended by white, often with a white queen or rook nearby.",
"sae_9941": "Detects a rook on its starting square (a1, d1, e1, f1, h1) that is not attacked by any piece.",
"sae_9932": "A pawn on the 6th or 7th rank is attacked by at least one friendly piece and not attacked by any enemy pieces.",
"sae_9947": "A piece (often a Bishop) is attacked by an opponent's piece and defended by at least one friendly piece, with the target square often on the first rank.",
"sae_9958": "A white rook is attacked by a single black piece and is the only white piece on its square.",
"sae_9936": "This feature detects a Queen on the same rank or file as the King, with at least one attacker and one defender, often with the Queen being the only defender.",
"sae_9964": "This feature detects a queen on a square attacked by exactly one white piece and at least one black piece.",
"sae_9956": "The feature detects an empty square on the first rank, which is the target square, and the white king is on the same rank, but not on the target square.",
"sae_9992": "Detects white rooks on their starting squares (d1, e1, f1) in middlegame positions where the rooks have not yet been activated.",
"sae_9960": "Detects a rook on an open file or rank that is directly opposed by an enemy rook, in rook-endgame or heavy-piece positions.",
"sae_10037": "The feature detects a king on the target square that is attacked by exactly one enemy piece and defended by no friendly pieces.",
"sae_9944": "Detects a black bishop on a light square, especially on the h5-e8 diagonal or a6, with no immediate attackers.",
"sae_10057": "The feature detects a vulnerable square on the 7th rank (h7 or a7) that is attacked by at least one black piece and is either undefended or defended by at most one white piece.",
"sae_9966": "White's king is castled or about to castle kingside, and the target square is the king's original square (e.g., g1 for kingside castling) or the square the king moves to during castling (e.g., g1 for kingside castling).",
"sae_10003": "A white bishop on a central square (d3, e3, f3, f4) is attacked by a black piece and defended by at least one white piece, with the bishop itself being the target piece.",
"sae_10059": "A pawn on the 7th rank (for White) or 2nd rank (for Black) that is attacked by at least one enemy piece and defended by at most one friendly piece.",
"sae_10145": "A white passed pawn on the 5th to 7th rank with promotion potential.",
"sae_10095": "A white piece attacks a black queen or bishop on a square that is also attacked by a black piece.",
"sae_10000": "Detects the f8 square being attacked by multiple black pieces, particularly when the black king is castled kingside and the square is empty.",
"sae_10075": "A queen is attacked by a single enemy piece, and the queen is not defended by any friendly pieces.",
"sae_10146": "Detects a square on the 7th or 8th rank that is attacked by a black piece and is either empty or occupied by a black piece.",
"sae_10079": "A white pawn on the 5th rank attacks an empty square on the 6th rank, which is also attacked by at least one black piece.",
"sae_10093": "A white piece attacks a black piece on a square, and the black piece is on a square of the same color as the white attacking piece.",
"sae_10014": "A square on the 5th, 6th, or 7th rank that is attacked by at least two enemy pieces and is not defended by any friendly pieces.",
"sae_10110": "Detects a central or kingside square attacked by at least one white piece and at least one black piece, often with a white pawn on an adjacent square.",
"sae_10101": "The feature detects empty squares on the first rank (d1 or f1) that are attacked by at least 3 white pieces and 0 black pieces, often with a white King on e1.",
"sae_10090": "The feature detects a white piece (often a bishop) on a central square (d2, d3, e3, g2) that is attacked by one black piece and defended by at least one white piece, with the white piece often being a bishop.",
"sae_10184": "White has a piece exerting uncontested control over advanced territory, often as a precursor to a mating or winning combination.",
"sae_10191": "A white bishop is attacked by at least one black piece, and the bishop is on a square where it is not defended by any white pieces.",
"sae_10159": "White King on the back rank, attacked by a white rook, with no black attackers.",
"sae_10163": "Detects a pawn that is attacked by an enemy piece, but not defended by a friendly piece.",
"sae_10122": "A white pawn on the 7th rank, with the target square being the promotion square on the 8th rank, and no pieces on the 8th rank blocking promotion.",
"sae_10195": "An undeveloped knight remaining on its home square (b1/g1/b8/g8), indicating an early-middlegame position where development is incomplete.",
"sae_10180": "A white pawn or bishop attacks a square on the 8th rank, with the white king nearby.",
"sae_10198": "A black bishop is attacked by at least one black piece, and not attacked by any white pieces.",
"sae_10113": "Detects an undefended square on the back rank (a8 or h8) that is attacked by a single enemy piece.",
"sae_10205": "White King on g1, defended by at least one White piece, with a White Knight on f3.",
"sae_10244": "A rook on the first rank is attacked by an enemy rook on the same rank, with no other pieces on the target square.",
"sae_10213": "Black king in a late endgame, frequently near the back rank or in a cornered/restricted position, spanning pawn, rook, and minor-piece endings.",
"sae_10218": "Detects a king on a square that is attacked by at least one enemy piece, with no friendly pieces defending the king.",
"sae_10292": "A king on the first rank is attacked by a knight on the third rank, with a pawn on the second rank blocking the king's escape.",
"sae_10300": "A square is attacked by at least one black piece, and not attacked by any white pieces.",
"sae_10024": "A white rook on the 4th rank or higher, attacking a black rook on the 1st rank, with no pieces between them.",
"sae_10253": "The feature detects squares attacked by two white pieces and one black piece, where the target square is empty and often on the first rank.",
"sae_10323": "White pawn on the 7th rank, one square away from promotion on the 8th rank, with no black pieces attacking the promotion square.",
"sae_10341": "The feature detects a pawn on the 4th or 5th rank that is attacked by two enemy pieces and defended by one or two friendly pieces.",
"sae_10379": "A white pawn on the 5th rank (d5, e5, or c5) that is attacked by at least two black pieces.",
"sae_10371": "A square on the 3rd, 4th, or 5th rank that is attacked by two pieces from each side, with the side to move being White.",
"sae_10422": "The feature detects squares attacked by two black pieces and one white piece, where the target square is empty.",
"sae_10408": "Detects a rook on the first rank, attacking an empty square on the first rank, with no enemy pieces attacking that square.",
"sae_10364": "The feature detects a white rook on f1 or d1, attacked by one black piece, and defended by at least one white piece, with white to move.",
"sae_10377": "This feature detects squares on the 4th, 5th, 6th, and 7th ranks that are attacked by white pieces, especially when those squares are on the a, b, or h files.",
"sae_10381": "White rook on the 7th rank attacking an empty square on the 8th rank, with the black king on the 7th or 8th rank.",
"sae_10401": "Detects a black rook on the back rank (7th or 8th) that is not attacked by white pieces.",
"sae_10373": "A white rook on the first rank is attacked by a black knight, often in a back-rank mating pattern.",
"sae_10395": "A white bishop on its starting square (c1 or f1) that is attacked by at least two white pieces and not attacked by any black pieces.",
"sae_10390": "Black rook on a8, with no white attackers, and the black king on the kingside.",
"sae_10380": "The feature detects a black king on the 6th rank, with a black rook on the 7th or 8th rank, and a white king on the 1st or 2nd rank, all on the kingside.",
"sae_10456": "Detects a black rook on its starting square (a8 or h8) that is not attacked by white pieces.",
"sae_10451": "The feature detects a black pawn on h3 or h5 that is attacked by white and potentially defended by black.",
"sae_10458": "Detects an early-development black position where the queen remains near the back rank and is defended by multiple own pieces, with no white pressure on it.",
"sae_10455": "The feature detects empty squares on the first rank that are not attacked by white pieces and are near the white king.",
"sae_10439": "White has a contested back-rank rook or a defended piece on the first rank under pressure from black.",
"sae_10471": "The feature detects a pawn on the 7th rank (or 2nd rank for Black) that is not attacked and can promote to a queen on the next move.",
"sae_10474": "A bishop is attacked by two enemy pieces and defended by one friendly piece, or attacked by one enemy piece and defended by one friendly piece, with the bishop being on a central square (d3, d5, c5, f4, c4).",
"sae_10530": "The feature detects a black pawn on g7, attacked by a black piece, with no white attackers, and white to move.",
"sae_10481": "Black's kingside rook is on h8, and the g7 pawn is missing, allowing a potential back-rank mate or attack along the h-file.",
"sae_10575": "A square on the 6th rank is attacked by one white piece and at least two black pieces.",
"sae_10535": "A knight on the 3rd rank (or 6th rank for Black) that is attacked by the opponent and defended by at least two of its own pieces.",
"sae_10587": "A queen occupies an active central or near-king square with no immediate pressure, while the side to move holds a decisive tactical advantage.",
"sae_10449": "Detects the h4/h5 squares as potential targets for White's attack, especially when the squares are undefended or lightly defended by Black, and White has pieces that can attack these squares (e.g., a knight on f3/g2, a bishop on c1/d2, or a queen on d1/e2).",
"sae_10547": "White's king is on h1 and is attacked by a black queen on the a8-h1 diagonal, with no white pieces defending h1.",
"sae_10367": "A locked pawn structure in a zugzwang endgame where multiple pawns on both sides are in direct opposition.",
"sae_10563": "Detects squares attacked by a white bishop, especially on the d-file, with no black attackers.",
"sae_10520": "A white rook attacks a black pawn, which is the only piece on the target square, and the pawn is not defended by any black pieces.",
"sae_10491": "A pawn on the 7th rank (for white) or 2nd rank (for black) that is one square away from a promotion square, with the king on the opposite side of the board.",
"sae_10597": "White pawn on the 7th rank, one square away from promotion, with no immediate threats to the promotion square.",
"sae_10642": "Detects a black bishop on a square attacked by one white piece and defended by one black piece, where the white piece is a pawn.",
"sae_10583": "The feature detects a safe square on the 1st or 2nd rank, attacked by at least one white piece, often a rook or queen, and sometimes defended by a bishop, with no black attackers.",
"sae_10627": "This feature detects a square on the first rank that is attacked by at least one black piece and is either undefended or defended by exactly one white piece.",
"sae_10588": "A white bishop on the 3rd or 4th rank, on the kingside or queenside, that is attacked by 0-1 black pieces and defended by 0-2 white pieces.",
"sae_10585": "Detects a knight on the 5th rank (or higher) attacking a square on the 8th rank that is not attacked by any other piece, with the black king nearby.",
"sae_10645": "Detects a white-attacked black piece (pawn or minor piece) on a central square (d5, e5) or a pawn on a4, with white having a significant attack advantage (at least 2 more attackers than black).",
"sae_10607": "A white pawn on d4/e4/d5/e5 is attacked by 0-1 black pieces and defended by 2-4 white pieces, with a white knight often involved in the defense.",
"sae_10621": "White rook attacks a square on the 7th or 8th rank, which is also attacked by a black piece, with the black king nearby.",
"sae_10661": "Detects pawns that are attacked by an opponent's piece and are not defended by a friendly piece.",
"sae_10699": "Detects a square attacked by an enemy pawn, which is either undefended or defended by only one friendly piece.",
"sae_10703": "Detects a white queen on b3 or e2 that is attacked by one black piece and defended by one or two white pieces.",
"sae_10745": "A white rook on its starting square (a8 or h8) on an open file, with a black king nearby, and no immediate threats to the rook.",
"sae_10658": "Detects a white rook on the a-file, with no white attackers on the target square, and the rook is not attacked by black pieces.",
"sae_10704": "Detects a piece on the first rank that is attacked by the side to move, especially if it's a knight.",
"sae_10544": "A square on the 3rd rank (for white) or 6th rank (for black) that is attacked by at least one friendly piece and not attacked by any enemy pieces.",
"sae_10647": "A queen safe from enemy attack but tactically active, typically threatening a decisive move against the opponent's king or a key square.",
"sae_10722": "The feature detects a square on the 6th or 7th rank that is attacked by both sides, with the target square often being a pawn or an empty square.",
"sae_10740": "A pawn on the 7th rank (for White) or 2nd rank (for Black) that is not attacked and is on the same file as the king.",
"sae_10785": "Black knight on b8, attacked by at least one black piece, with no white attackers.",
"sae_10716": "Detects empty squares on the first rank that are attacked by a white rook, often in positions where the white king is also on the first rank.",
"sae_10774": "A contested square that serves as a fork or interference target, attacked by at least one piece from each side.",
"sae_10748": "Detects a rook on the back rank (or 7th rank for white) that is not attacked by any pieces, with a pawn on the adjacent file blocking its escape.",
"sae_10788": "White Queen on d1 is attacked by at least one black piece, and defended by at least two white pieces.",
"sae_10792": "A square on the 6th or 7th rank is attacked by at least one black piece, and not attacked by white.",
"sae_10831": "A square on the 6th rank is attacked by exactly one white piece and at least one black piece.",
"sae_10816": "White rook on the first rank, defending a square that is attacked by at least one black piece, and the rook itself is attacked by at least one black piece.",
"sae_10764": "The feature activates when a white queen on b3 is attacked by a black piece and defended by at least one white piece, with the queen often being the only piece on the b-file.",
"sae_10545": "Detects a Rook on the a-file, especially on a8 or a2, that is attacked by an enemy piece.",
"sae_10865": "The feature detects squares on the back rank that are attacked by a white piece, especially if the square is empty and the king is nearby.",
"sae_10832": "The feature activates when a white piece attacks a black piece on a square that is also attacked by at least two black pieces.",
"sae_10874": "White rook on the 2nd rank, attacked by a white king, with no black attackers.",
"sae_10870": "A white pawn on the 7th rank is attacking an empty square on the 8th rank, with no black pieces attacking that square.",
"sae_10877": "A pawn on the 4th or 5th rank, on the b, g, or h file, with no attackers from either side.",
"sae_10750": "This feature detects a white rook on its starting square (e1 or f1) that is attacked by at least two white pieces and zero black pieces.",
"sae_10864": "The feature detects a vacant square on the 7th rank (d7 or e7) that is heavily attacked by black pieces and not attacked by white pieces.",
"sae_10859": "The feature detects the h8 square being attacked by a black piece, especially when white has a king on the back rank and a queen or rook on the h-file, suggesting a potential back-rank mate or defense.",
"sae_10873": "A square is attacked by white pieces and defended by fewer black pieces, with white having at least two attackers.",
"sae_10835": "The feature detects squares on the back rank (d8 or f8) that are attacked by at least two black pieces and not attacked by any white pieces.",
"sae_10867": "A pawn on the 4th rank (d4, e4, f3, e6) that is attacked by 1-2 black pieces and attacked by 2-4 white pieces.",
"sae_10833": "A white rook or queen attacks a black rook on its starting square (rank 8 for black, or rank 1 for white if the target is a white rook), with at least one black defender.",
"sae_10891": "Detects a black rook on the 2nd rank, attacked by white, with white having 0 or 1 attackers.",
"sae_10900": "A pawn on the second rank is attacked by at least one friendly piece and not attacked by any enemy pieces.",
"sae_10905": "The feature detects a pawn on the 4th rank (c4, e4, g4) that is attacked by one black piece and attacked by one or more white pieces.",
"sae_10913": "A white rook attacks a square on the 7th or 8th rank, which is also attacked by a black piece, and the square is near the black king.",
"sae_10908": "Detects a pawn on a7 or h7 that is not attacked by white, and is attacked by at most two black pieces.",
"sae_10909": "A white queen is attacked by a black piece, but also defended by a white piece, and the queen is on a square where it can capture a black piece.",
"sae_10911": "Detects a white pawn on a central square (d4, d5, e4, e5, f4) that is attacked by one black piece and defended by at least two white pieces.",
"sae_10925": "A square on the first two ranks is attacked by one white piece and one black piece, with the target square being empty.",
"sae_10947": "White's h1-rook is undefended and on its starting square, with the king on e1 or d1.",
"sae_10954": "Detects a critical king step in a king-and-pawn endgame, likely related to gaining or maintaining the opposition.",
"sae_10917": "White King on g1/h1 with no white pieces on f1/g1/h2/g2 (except the King itself) and no black pieces attacking g1/h1.",
"sae_10976": "A white knight on f3 or c3 attacks a square on the 3rd rank, which is either undefended or defended by a single black piece.",
"sae_10937": "Detects a square on the first three ranks (from the perspective of the side to move) that is attacked by multiple enemy queens, especially when the king is nearby.",
"sae_10973": "White rook attacks the f7 pawn, which is defended by at least one black piece, often a king.",
"sae_10949": "White pawn or knight attacks an empty square on the 3rd or 4th rank, with no black attackers.",
"sae_10960": "White pawn on the 7th rank, with the white king on the 6th rank, and the target square is on the 8th rank, with no pieces on the target square.",
"sae_10988": "A square is attacked by two white pieces and one or two black pieces, with the target square being empty.",
"sae_10952": "White's single attacker on h7, defended by one or two black pieces, often a pawn, with the black king nearby.",
"sae_11010": "A white piece is attacked by exactly one white piece and zero black pieces, and the target square is on the first or second rank.",
"sae_11011": "King opposition or key-square control in a king-and-pawn endgame, often determining zugzwang or pawn breakthrough.",
"sae_11016": "A white piece is attacked by one black piece and defended by at least two white pieces, with the target piece being a Bishop or Knight.",
"sae_11044": "A queen is attacked by exactly one white piece, and the target square is either the queen's square or an empty square on the first rank.",
"sae_10879": "Detects a vacant square on the back rank (rank 8 for white, rank 1 for black) that is attacked by at least one enemy piece and is a potential target for a back-rank mate or other tactical threat.",
"sae_10998": "A white knight on rank 3, uncontested by black, in an active tactical or mating position.",
"sae_10980": "White rook or queen on the 7th rank exerting pressure on the black king's position, often in endgames with exposed black king.",
"sae_11083": "A white rook on the first rank, not attacked by black, with no white pieces defending it, and the white king is also on the first rank.",
"sae_10995": "This feature detects a square on the 6th rank that is attacked by white and more heavily attacked by black.",
"sae_11055": "Detects a black rook on its starting square (8th rank) that is not attacked by white pieces.",
"sae_11110": "White King on the back rank (1st or 2nd) with no black attackers and at least one white attacker.",
"sae_11098": "White's pawn on the 2nd rank is attacked by at least one white piece and not attacked by any black pieces.",
"sae_11066": "Detects an empty square on the back rank (c8 or g8) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_11056": "A vulnerable back-rank pawn or king position creates a skewer or deflection opportunity.",
"sae_11099": "White pawn on 7th rank, with no white pieces attacking the target square on the 8th rank, and no black pieces attacking the target square on the 8th rank.",
"sae_11043": "This feature detects a pawn on the 3rd or 4th rank (for white) that is attacked by one black piece and defended by at least one white piece, often with a white pawn on the 2nd rank supporting it.",
"sae_11073": "A bishop on the target square is attacked by at least one enemy piece and defended by at least one friendly piece, with the attacking side having more attackers than defenders.",
"sae_10999": "A rook on the first rank, on the same file as its king, with no pieces between them, and no white pieces attacking the rook.",
"sae_11117": "Detects a black rook on the b-file or g-file, with no white attackers and at most one black attacker.",
"sae_11146": "A pawn on the 4th rank (for white) or 5th rank (for black) that is well-supported by at least 3 friendly pieces and not attacked by any enemy pieces.",
"sae_11076": "The feature detects a king on the back rank (or h-file corner) that is attacked by at least one enemy piece, with no friendly pieces defending it.",
"sae_11085": "Detects a square attacked by at least one white piece and not attacked by any black piece, often a pawn, on the 5th or 6th rank, with the white king nearby.",
"sae_10953": "A pawn is attacked by at least two friendly pieces, and is either undefended or attacked by fewer enemy pieces.",
"sae_11119": "A square on the 6th rank is attacked by at least one white piece and at least one black piece, with black having more attackers.",
"sae_11133": "A white pawn on h2, with the white king on g1 or h1, and no black pieces attacking h2.",
"sae_11130": "White King on g1/g2, castled or castling, with at least one friendly piece (often a Knight or Bishop) defending it, and no immediate enemy attackers.",
"sae_11144": "White knight on the back rank (1st or 8th) attacked by at least one white piece and zero black pieces.",
"sae_11142": "Detects empty squares on the 7th or 8th rank that are not attacked by white pieces, often near the enemy king.",
"sae_11158": "A square attacked by one white piece and at least one black piece, where the target square is empty.",
"sae_11156": "Detects a rook on the 7th rank (or 2nd for black) attacking a square on the 1st rank (or 8th for black) that is not defended by white.",
"sae_11161": "White's queen or bishop attacks h7, which is defended by a black pawn and is the only defender of the black king.",
"sae_11159": "Detects a square on the 4th rank that is attacked by white, with a preference for squares that are not attacked by black.",
"sae_11218": "This feature detects squares that are attacked by a white pawn and are on the 4th or 5th rank, often in the center or kingside.",
"sae_11202": "A queen attacks a square that is undefended by the opponent.",
"sae_11232": "The feature detects a black bishop on a square attacked by exactly one white piece, with no black attackers.",
"sae_11179": "White's attack on h7, especially when defended by a black pawn, with a focus on the number of attackers and defenders.",
"sae_11245": "A queen attacking an empty square on the back rank, often near the enemy king, with no black defenders.",
"sae_11213": "Detects a black rook on its starting square (a8 or h8) that is not attacked by white pieces.",
"sae_11259": "A pawn on the 2nd or 3rd rank, on the same file as the king, with no attackers from either side.",
"sae_11226": "The feature detects a highly-attacked empty square on the 2nd rank, typically d2 or e2, with no black attackers.",
"sae_11251": "Detects the h6 square being attacked by at least two black pieces, with at most one white attacker, and no piece currently on h6.",
"sae_11238": "The feature detects an empty square on the 7th rank (for white to move) that is attacked by a white piece, often a knight, and sometimes also attacked by a black piece.",
"sae_11308": "The feature detects a square on the 6th rank that is attacked by a white pawn and at least one black piece, with the square being empty.",
"sae_11283": "Detects a queen on a square attacked by an enemy piece, with no friendly pieces defending it.",
"sae_11274": "A knight on an advanced outpost square being contested by enemy pieces, with or without friendly support.",
"sae_11320": "A rook on the back rank (rank 8 for white, rank 1 for black) that is not attacked by the opponent.",
"sae_11300": "A white queen is attacked by one black piece and defended by one or two white pieces.",
"sae_11368": "A white bishop on the first or second rank, attacked by no black pieces, and attacked by exactly one white piece.",
"sae_11357": "A white pawn on the 5th rank is attacked by 0-1 black pieces and defended by 1-2 white pieces.",
"sae_11343": "The feature detects a square that is attacked by two black pieces and is either undefended or defended by one white piece.",
"sae_11365": "Detects a black rook on its back rank, especially when attacked by white and/or defended by black.",
"sae_11414": "Black king on e8 is attacked by 3+ black pieces, with no white attackers.",
"sae_11353": "A white bishop on c1/g1 (or knight on c3) is attacked by a black piece and defended by a white piece, with the white king nearby.",
"sae_11321": "Detects a king on the back rank (rank 8 for white, rank 1 for black) that is not attacked by the opponent and is blocked by its own pieces, suggesting a potential back-rank mate.",
"sae_11359": "A white piece attacks a black piece on the back rank, with no black defenders.",
"sae_11415": "White pawn on the 5th rank is attacked by 1-3 black pieces and defended by 1 white piece.",
"sae_11331": "A queen is attacked by one enemy piece and defended by exactly one friendly piece.",
"sae_11468": "A white bishop is attacked by one black piece and defended by one white piece.",
"sae_11364": "White king on b1 with a rook on d1, under heavy queenside pressure from black pieces.",
"sae_11393": "A white rook or king attacks an empty square on the 1st or 2nd rank, with no black attackers.",
"sae_11389": "White piece (typically a rook) directly targeting a black rook with no friendly pieces in between, including knight attacks on rooks.",
"sae_11396": "A square on the 6th rank is attacked by a white pawn and at least one black piece, and is not occupied by a piece.",
"sae_11209": "Black's king's rook on f8 is attacked by at least one black piece, with no white attackers.",
"sae_11493": "White's f2 pawn is attacked by one black piece and defended by at least two white pieces, with a white rook on the f-file.",
"sae_11483": "King active on central or near-central ranks (3rd\u20136th) in a king-and-pawn endgame, navigating pawn structures without being under attack.",
"sae_11494": "Detects a black queen on the first rank, with the white king also on the first rank, and the queen is attacked by at least one black piece.",
"sae_11490": "Detects squares on the 8th rank that are not attacked by white pieces, especially those on the kingside.",
"sae_11453": "Detects endgame positions with an advanced passed pawn and a dominant king or piece, where promotion is the decisive plan regardless of endgame type.",
"sae_11501": "Detects a black piece on the 7th or 8th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_11436": "A white pawn on a5/c5 attacking b6, or a white bishop on a5/c5 attacking b6, with b6 being empty and undefended by black.",
"sae_11503": "A white piece attacks a black piece on the 2nd or 7th rank, with no black defenders.",
"sae_11488": "A central square (d5, e6, c3, f4, e5, f5) is attacked by at least two white pieces, with white having a net attack advantage of at least +1.",
"sae_11532": "Rook endgame with active rook placement, often involving deflection, interference, or mating threats.",
"sae_11514": "This feature detects a king being attacked by exactly one enemy piece, regardless of whether the king is defended.",
"sae_11553": "A square on the 6th, 7th, or 8th rank is attacked by one white piece and defended by one black piece, with the square being empty.",
"sae_11550": "A white pawn on the 2nd rank is attacking a square on the 3rd or 4th rank, which is also attacked by a black piece.",
"sae_11565": "A white pawn on the 7th rank attacks a target square on the 8th rank, with the white king nearby.",
"sae_11546": "A pawn on the 2nd rank (for white) or 7th rank (for black) that is attacked by at least one friendly piece and not attacked by any enemy pieces.",
"sae_11541": "White pawn on the 2nd rank, with a white king on the 3rd rank, and a black pawn on the 4th rank, all on the same file, with the target square being the 3rd rank on that file.",
"sae_11574": "Detects a white piece (Rook or Knight) on the 2nd, 3rd, or 4th rank that is attacked by at least one black piece and defended by at least one white piece.",
"sae_11582": "A pawn on the 4th or 5th rank that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_11596": "White queen on d1 or e2 in an uncastled opening position, shielded by friendly pieces.",
"sae_11593": "White King on the first rank, attacked by no pieces, and the target square is also on the first rank, attacked by one white piece.",
"sae_11563": "A contested central or passed pawn under tactical tension, often serving as a pivot for a combination.",
"sae_11721": "Detects a black pawn on f7, g7, or h7, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_11655": "Detects a knight on the back rank (1st or 8th) that is not attacked by the opponent.",
"sae_11667": "A white bishop on a central square (d3, d4, d5, g2) is attacked by at least one white piece and not attacked by any black pieces.",
"sae_11624": "The feature activates when the king is on the 6th or 7th rank, and the target square is on the 1st rank, indicating a potential king-side castling or king safety issue.",
"sae_11600": "Trapped or misplaced black minor piece in an endgame, often a corner or edge knight that lacks mobility.",
"sae_11760": "The feature detects a white pawn on the b-file, on rank 4 or 5, with no attackers or defenders.",
"sae_11735": "A white piece attacks a black bishop, which is the only piece on the target square.",
"sae_11684": "Detects a white pawn on the 7th rank, with the target square being the promotion square for that pawn, and no black pieces attacking the target square.",
"sae_11644": "A white bishop on the first rank, or on the h6 square, that is not attacked by black pieces.",
"sae_11676": "A white piece attacks a black piece on a square, and that black piece is also attacked by at least one other black piece.",
"sae_11755": "Detects a white piece (specifically a bishop) on the second rank (f2, g2, e1) that is attacked by a white piece and not attacked by a black piece.",
"sae_11616": "The feature detects a square attacked by a black pawn, where the square is on the 5th, 6th, or 7th rank, and there are no white attackers.",
"sae_11580": "The feature activates when a white knight on b4 attacks c6, which is defended by three black pieces, with the white king on the kingside.",
"sae_11691": "The feature detects a pawn on the 7th rank (for white) or 2nd rank (for black) that is one square away from promotion, with the target square being the promotion square.",
"sae_11771": "Detects a black rook on the back rank (7th or 8th) that is not attacked by white pieces.",
"sae_11726": "A square is attacked by at least two black pieces, with no white attackers, and is on the 3rd or 4th rank.",
"sae_11832": "A black knight retreating or relocating to a back-rank square under pressure.",
"sae_11843": "The feature detects a white piece attacking h2, which is also attacked by a black piece, with the white king on g1 or h1.",
"sae_11590": "A rook on the a-file (or f-file) is attacked by an enemy rook on the adjacent b-file (or g-file) or on the same file from a distance.",
"sae_11848": "A pawn on the 7th rank (for white) or 2nd rank (for black) that is one square away from promotion, with the target square being the promotion square.",
"sae_11779": "A white pawn attacks a black bishop on a central square (d4, e4, f4, g4) or a square adjacent to the center (c3, c4, c5, d3, d5, e3, e5, f3, f5, g3, g5).",
"sae_11810": "A square on the 3rd or 4th rank (for white) that is attacked by two black pieces and defended by at most one white piece, often near the black king.",
"sae_11749": "Detects a king on the first two ranks that is attacked by at least one enemy piece, with no friendly pieces defending it.",
"sae_11876": "A queen that is unattacked by both sides, typically isolated with no immediate threats.",
"sae_11885": "Detects a black pawn on f7 or g7 that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_11883": "A square on the 6th rank that is attacked by White and over-defended by Black (Black has at least 2 more attackers than White).",
"sae_11899": "A square is attacked by at least one white piece, and the black king is on an adjacent square.",
"sae_11789": "White's queen or rook attacks g7, which is either empty or occupied by the black king, and is not defended by a black pawn.",
"sae_11950": "Detects a friendly knight on the first rank that is attacked only by friendly pieces.",
"sae_11910": "A white rook is attacked by a white piece on its starting square or a square it has just moved to, with the rook being the only piece on that square.",
"sae_11909": "A square attacked by one white piece and one black piece, where white has a pawn on the adjacent file and rank.",
"sae_11806": "White's rook on its starting square (a1 or h1) is undefended by white pieces and unattacked by black pieces, with the white king on the kingside.",
"sae_11943": "The feature detects an empty square on the back rank (g1 or h1) that is attacked by exactly two white pieces and zero black pieces.",
"sae_11936": "The feature detects a target square that is attacked by white at least twice and by black at least once, with white having a net advantage of at least one attacker.",
"sae_11933": "A king on the 6th, 7th, or 8th rank, with no pawns on the same rank or file as the king, and no enemy pawns on the same rank or file as the king.",
"sae_11983": "Endgame positions where a rook (either colour) operates on an open file or rank with tactical threats against the opposing king.",
"sae_11978": "The feature detects the king's castling squares (b1, c1, d1, e1, g1) when the king is on the first rank and there are no pieces on the target square.",
"sae_11994": "A white pawn on f2 or e2 is attacked by a black piece and defended by a white piece, with the white king on g1 or g2.",
"sae_11991": "A black pawn on the 5th rank is attacked by at least two black pieces and zero white pieces, often on c5.",
"sae_11969": "The feature detects a white pawn on the 4th or 5th rank that is attacked by a black pawn and defended by at least 2 white pieces, with white to move.",
"sae_11798": "A pawn on the 2nd rank (for the side to move) is attacked by one enemy piece and defended by at least one friendly piece.",
"sae_11995": "Black king in a castled or near-castled position attacked by its own pieces (self-interference or overload pattern).",
"sae_11973": "This feature detects a rook on its starting square (or a square it could have started on, like a1/h1 for white, a8/h8 for black) that is not attacked by the opponent, and is often defended by its own side.",
"sae_11970": "A white pawn on h2, attacked by no white pieces, and attacked by 0 or 1 black pieces.",
"sae_11915": "The feature detects a black knight on the 7th rank (or f8) that is attacked by at least 2 black pieces and at most 1 white piece.",
"sae_11857": "White attacks a black bishop on the 6th or 7th rank with one piece, while black defends it with one or two pieces.",
"sae_12016": "A white queen or rook is on the first rank, attacked by exactly one white piece and zero black pieces.",
"sae_12024": "A square is attacked by at least one black pawn and no white pieces, and is on the 4th or 5th rank.",
"sae_11963": "A white rook or queen attacks a black rook on the back rank, with no black defenders.",
"sae_11998": "This feature detects a white piece attacking a black queen, or a white pawn attacking an empty square on the 8th rank.",
"sae_11874": "A queen on the back rank or second rank is attacked by one white piece and defended by one black piece.",
"sae_11996": "Detects a pawn on the 6th or 7th rank that is attacked by at least one enemy piece, and optionally defended by one friendly piece.",
"sae_11894": "The feature detects the king's square when it is on the second or third rank, especially when it is not attacked by the opponent.",
"sae_12007": "Detects a pawn on the 5th rank that is attacked by a black piece and not defended by a white piece, or a king on the 2nd rank that is attacked by a black piece and not defended by a white piece.",
"sae_12031": "White king retains castling rights and is surrounded by friendly pieces, with no enemy pieces attacking its square.",
"sae_11793": "Detects a Queen on a square that is attacked by an enemy piece and defended by at most one friendly piece.",
"sae_12029": "Detects a square attacked by the side to move, where the side to move has at least one more attacker than the opponent, and the square is on the 5th or 6th rank.",
"sae_12040": "A white rook attacking an empty square on the back rank or 7th rank, which is defended by two black pieces.",
"sae_12056": "A square on the 3rd rank (for White) or 6th rank (for Black) that is attacked by both sides, often with a pawn or knight involved in the attack/defense.",
"sae_11834": "This feature detects a white pawn on the 2nd rank (b2 or f2) that is undefended and attacked by no black pieces, with the white king on the 1st or 2nd rank.",
"sae_12118": "A queen (colour unspecified) in a tactically vulnerable position, often near the centre or in a mating-net context.",
"sae_11872": "A white rook on the back rank is attacked by one black piece and defended by one white piece (or two white pieces if the target square is e1).",
"sae_12108": "Detects a black bishop on g7 or h8, especially when it's undefended by white pieces.",
"sae_12086": "This feature detects a black bishop on a square that is attacked by white and defended by black, with white having at least as many attackers as black has defenders.",
"sae_12064": "A white pawn on g2 (or f2) is attacked by a white knight on f3 (or e3) and defended by no black pieces.",
"sae_12072": "The feature detects a White Rook on its starting square (a1 or h1) with no White attackers, indicating it is undeveloped or pinned.",
"sae_12113": "A white pawn on the 4th or 5th rank is attacked by at least one black piece, and is either undefended or defended by only one white piece.",
"sae_12119": "Detects a black pawn on the 5th rank (for white) that is not attacked by white pieces.",
"sae_12124": "White pawn on h2 (or h4, d3) is attacked by 0-2 white pieces and 0-2 black pieces, often in a kingside pawn structure.",
"sae_12066": "The feature detects an undefended empty square that is attacked by at least two black pieces, with the white king nearby.",
"sae_12178": "A white knight on c3 (or f3) that is attacked by at least two black pieces, and defended by at most two white pieces.",
"sae_12131": "The feature detects a pawn on a2 or h2 that is either undefended or defended by one white piece and attacked by one black piece.",
"sae_12147": "White King on g1 is attacked by at least one white piece, with no black attackers.",
"sae_12194": "A king on the back rank under direct attack by an enemy piece, in positions where defensive resources are limited or overwhelmed.",
"sae_11865": "Detects a pawn on the 2nd rank that is undefended by its own pieces and is attacked by at most one enemy piece.",
"sae_12128": "A white piece attacks a black queen, which is the only piece on its square.",
"sae_11878": "White pawn on the 3rd or 4th rank, attacked by at least two white pieces, and not attacked by any black pieces.",
"sae_11737": "Detects a pawn on the 7th rank (for white) or 2nd rank (for black) that can promote to the target square on the 8th/1st rank, with no immediate blocking pieces.",
"sae_11664": "Detects a tactical pattern involving an undefended piece or pawn that is under immediate threat in an endgame or opening position.",
"sae_12270": "Detects squares on the 7th rank (or 2nd rank for Black) that are attacked by at least 3 enemy pieces and are not attacked by any friendly pieces.",
"sae_12243": "The feature detects a white rook on the d-file attacking d1, with the white king on the e-file or f-file, and a black king on the back rank.",
"sae_12249": "Pawn endgame with a locked or near-locked pawn structure where zugzwang or a passed pawn determines the outcome.",
"sae_12200": "A white rook on the first rank is attacked by at least one black piece, and the target square is the rook's current square.",
"sae_12244": "The feature detects an undefended back rank square (h1 or b1) that is attacked by at least one white piece, often a rook.",
"sae_12280": "This feature detects a square on the 7th rank that is attacked by white and defended by black, with white having at least as many attackers as black.",
"sae_12176": "The feature detects an empty square on the 8th rank that is attacked by a white piece or is a potential promotion square for a white pawn.",
"sae_12213": "Detects squares attacked by exactly two black pieces, with no white attackers, where the square is empty.",
"sae_12239": "White bishop on home territory (ranks 1-3) in a standard development position, surrounded by friendly pieces with limited enemy pressure.",
"sae_12172": "A rook on its starting square (a1 or h1) that is not attacked, with the king on e1/e8 and no pieces between them, indicating the possibility of castling.",
"sae_12282": "A passed pawn on the 5th rank is defended by a friendly piece and not under immediate attack.",
"sae_12294": "Detects a black rook on its original square (8th rank) that is heavily defended by black pieces and not attacked by white pieces.",
"sae_12306": "White's rook on the 8th rank is attacked by multiple black pieces, but also defended by a white piece.",
"sae_12297": "This feature detects a knight on the first or second rank, especially if it is attacked by a pawn or bishop, or if it is on a corner square.",
"sae_12330": "Detects an empty square on the back rank (1st or 8th) that is not attacked by any pieces.",
"sae_12305": "This feature detects a pawn on the 7th rank, especially if it is a white pawn on the h-file, and the target square is the 8th rank.",
"sae_12295": "An advanced passed pawn on the 6th or 7th rank under attack, where the attacker aims to capture or blockade it.",
"sae_12353": "Safe, uncontested knight with no immediate enemy attack.",
"sae_12371": "This feature detects a white queen on a square attacked by at least one white piece and not attacked by any black pieces.",
"sae_12345": "This feature detects a square that is attacked by exactly one black piece and not attacked by any white pieces.",
"sae_12374": "White pawn on the 7th rank, with the target square being the promotion square on the 8th rank, and no enemy pieces attacking the target square.",
"sae_12410": "Detects an undefended square on the back rank (1st for white, 8th for black) that is attacked by exactly one white piece and exactly one black piece.",
"sae_12398": "A black rook is under attack by a white piece and defended by a black piece, often but not exclusively on the back rank.",
"sae_12443": "This feature detects a black bishop or knight on a central square (d4, d5, f5, b3) that is attacked by at least two white pieces and defended by at least one black piece.",
"sae_12427": "A pawn on the 2nd or 3rd rank of the side to move, which is undefended and has no enemy attackers.",
"sae_12429": "A white pawn on the 5th rank is attacked by multiple black pieces, but only defended by one white piece.",
"sae_12422": "Detects key contested squares in zugzwang pawn endgames where white has a numerical attack advantage.",
"sae_12450": "White's queen attacks f7, which is defended by a black pawn and potentially other pieces, but not by a white piece.",
"sae_12525": "Contested square where one side has a material or tactical advantage in a forcing exchange.",
"sae_12503": "A white knight on a central square (d5 or e4) that is attacked by fewer black pieces than white pieces.",
"sae_12467": "The feature detects a pawn on the 2nd rank (a2 or h2) that is attacked by one white piece and one black piece, or an empty square on a2/h2 that is attacked by an equal number of white and black pieces.",
"sae_12504": "This feature detects a pawn on the 2nd, 3rd, or 4th rank that is attacked by an enemy piece and not defended by a friendly piece.",
"sae_12523": "White attacks a black piece on the back rank (7th or 8th) that is defended by exactly one black piece.",
"sae_12496": "This feature detects a pawn on an open file or semi-open file that is attacked by both sides, with the attacking side having at least as many attackers as the defending side.",
"sae_12413": "White bishop on c1, attacked by no black pieces, and defended by at least one white piece.",
"sae_12515": "This feature detects a black rook on a square that is attacked by white, especially when the rook is undefended or attacked by an equal number of pieces.",
"sae_12541": "The king's castling square g1 is attacked by white pieces, with no black attackers, and the king is on e1.",
"sae_12532": "Detects an undefended empty square attacked by exactly one enemy piece.",
"sae_12543": "A white pawn attacking an empty square on the 4th, 5th, or 6th rank, especially on the a-file.",
"sae_12510": "The feature detects a king on the back rank, with a friendly bishop on the long diagonal, and the target square is a back rank square on the same side as the king.",
"sae_12420": "White's single pawn attack on a square that is attacked by multiple black pieces.",
"sae_12514": "This feature detects a central square (d5/e5/e6) that is under contention, with at least 3 white attackers and 1-3 black attackers, and is currently empty.",
"sae_12582": "Detects an empty square on the opponent's back rank (rank 8 for White, rank 1 for Black) that is attacked exclusively by opponent's pieces, especially when attacked by 3 or more pieces.",
"sae_12586": "A highly defended square on the e-file (e1 or e2) by White pieces, with no Black attackers.",
"sae_12588": "The feature detects a pawn on f7, g7, or h7 that is attacked by one white piece and defended by one black piece, with white to move.",
"sae_12590": "A queen on the target square is attacked by one white piece and one black piece, with white to move.",
"sae_12602": "A queen on the target square is attacked by at least one black piece and not attacked by any white pieces.",
"sae_12599": "A rook is on a back-rank square and is involved in a back-rank or skewer tactic.",
"sae_12604": "A square is attacked by one white piece and one black piece, with the white king nearby, and the square is on the 4th or 5th rank.",
"sae_12603": "White pawn on the 5th rank attacking a square on the 6th rank, which is also attacked by a black pawn.",
"sae_12651": "The feature detects the a6 square being attacked by a black piece, with no white piece on a6, and white to move.",
"sae_12662": "White's a1 rook is on its starting square and is not attacked by Black.",
"sae_12642": "A black queen attacking an undefended square on the first rank, often near the white king.",
"sae_12687": "White rook on the same rank or file as the black king, attacking a square on the king's back rank.",
"sae_12667": "A square attacked by one white piece and at least one black piece, where the white piece is a pawn.",
"sae_12674": "Central tactical imbalance \u2014 an active piece under pressure where the attacker is outnumbered by defenders, signalling a potential tactical resource or exchange sequence.",
"sae_12630": "The feature detects a black rook on the back rank (8th rank) that is either undefended or attacked by white, with white to move.",
"sae_12689": "A black bishop is attacked by exactly one black piece, and no white pieces.",
"sae_12683": "This feature detects a white pawn on the 5th rank attacking an empty square on the 6th rank, with at least one black attacker on that square.",
"sae_12694": "A black queen on the first rank, attacked by no white pieces, and not attacked by any black pieces (except in cases where it is attacked by a black king).",
"sae_12700": "Undeveloped or passive white bishop on the back rank in a position where piece activity is decisive.",
"sae_12634": "The feature detects a pawn on the 2nd or 3rd rank that is attacked by an enemy piece and is either undefended or defended by only one friendly piece.",
"sae_12617": "Detects a black rook on f8, attacked by at least two black pieces, with no white attackers.",
"sae_12698": "A white king attacking an empty square, with no black attackers on that square.",
"sae_12702": "A square attacked by one friendly piece and two enemy pieces, where the friendly piece is a pawn and the square is on the 2nd rank.",
"sae_12715": "The feature detects the f8 square being attacked by multiple black pieces, with no white defenders, often with the black queen involved.",
"sae_12709": "Detects a king on the first rank, with a rook on the same rank, and the target square is an empty square on the first rank between the king and the rook, with at least one black attacker.",
"sae_12728": "White King on a light square, attacked by no pieces, and the target square is the King's square.",
"sae_12755": "The feature detects a white piece (often a Queen or Rook) on a square attacked by one black piece and defended by two white pieces.",
"sae_12724": "Detects an active queen (either colour) on an open file or diagonal not under immediate attack, typically in a middlegame tactical position.",
"sae_12756": "White rook on the back rank (1st rank) with no white pieces behind it and no black pieces attacking it.",
"sae_12791": "A white knight attacking a black queen.",
"sae_12829": "The feature detects a square that is attacked by at least one black piece and is either undefended or defended by only one white piece.",
"sae_12720": "The feature detects a rook on the first rank, with the target square being an empty square on the same rank, and the king of the side-to-move is also on the first rank.",
"sae_12827": "A pawn on the 7th rank (or 2nd rank for Black) that is not attacked by the opponent and is not defended by the side to move.",
"sae_12808": "This feature detects a pawn on the 7th rank (for white) or 2nd rank (for black) that is attacked by an enemy pawn and defended by a friendly pawn, with the king nearby.",
"sae_12794": "A white pawn on d5 or e5 attacks an empty square on c6, f6, or g6, which is also attacked by at least one black piece.",
"sae_12783": "Detects a black queen on the first rank, especially when it is attacked by black pieces or is the only black piece on the first rank.",
"sae_12807": "This feature detects squares on the 4th or 5th rank that are attacked by white pieces, especially when the target square is occupied by a black piece.",
"sae_12855": "A piece (often a knight or bishop) on the target square is attacked by two white pieces and two black pieces, or by one white piece and one black piece, or by three white pieces and one black piece.",
"sae_12853": "White pawn on the 7th rank, especially if it's a passed pawn or near the opponent's king.",
"sae_12742": "White attacks an empty square with one piece, while Black attacks it with multiple pieces (2 or 3).",
"sae_12863": "The feature detects a pawn on h2 or h3, with the king on the first or second rank, and a bishop on the a1-h8 diagonal, indicating a potential king-side attack or defense.",
"sae_12871": "The feature detects an empty square on the 8th rank that is not attacked by the opponent, often with a white pawn on the 7th rank.",
"sae_12771": "This feature detects a pawn on the 7th rank (for white) or 2nd rank (for black) that is one square away from promotion, with the king on the 8th rank (for white) or 1st rank (for black) on an adjacent square to the promotion square.",
"sae_12887": "This feature detects a king (of either color) on a square that is attacked by an enemy piece and not defended by a friendly piece.",
"sae_12915": "White knight attacks a black pawn on the 4th, 5th, or 6th rank, with no other white attackers.",
"sae_12899": "This feature detects a piece on a square that is attacked by both sides, with white having at least as many attackers as black.",
"sae_12941": "A queen is attacked by one friendly piece and one or two enemy pieces.",
"sae_12870": "White pawn on d2 or e2 attacking an empty square on d3 or e3, with no black attackers on the target square.",
"sae_12909": "Detects a rook on the back rank (or an empty back rank square attacked by a rook) that is not defended by its own side and is attacked by the opponent's rook.",
"sae_12911": "A pawn on the 3rd or 4th rank is attacked by an enemy piece and undefended by a friendly piece.",
"sae_12953": "White pawn on the 7th rank, or a white pawn on the 6th rank with no blocking pawns, aiming for promotion on the 8th rank.",
"sae_12906": "Detects complex pawn-structure tension in king-and-pawn endgames, typically involving passed or blocked pawns on the 4th and 5th ranks with zugzwang potential.",
"sae_13016": "A knight on the edge of the board (a, b, g, or h files, or 1st or 8th ranks) that is not attacked by the opponent.",
"sae_13054": "A bishop on a long diagonal, attacking a square that is not attacked by any white pieces.",
"sae_13031": "The feature detects a pawn on h7 (or h6) that is attacked by at least one black piece, but not attacked by any white pieces, with white to move.",
"sae_13066": "This feature detects a pawn on the 5th rank (for White) or 4th rank (for Black) that is attacked by an enemy piece and defended by a friendly piece.",
"sae_13102": "Detects an undefended central square (c5, d5, f5, f6) that is heavily attacked by the opponent (3-4 attackers).",
"sae_13048": "Detects a square on the back rank (or 7th rank for black) that is attacked by multiple enemy pieces and is currently empty.",
"sae_13107": "Empty squares on the back rank in an active king endgame, relevant to king mobility and zugzwang calculation.",
"sae_13063": "This feature detects an undefended empty square on the 6th or 7th rank attacked by a white pawn.",
"sae_13113": "This feature detects a black queen attacked by exactly one white piece, with no black defenders, on the 6th, 7th, or 8th rank.",
"sae_13090": "This feature detects a white rook on the back rank (1st or 2nd) that is attacked by a black piece.",
"sae_13108": "This feature detects squares that are attacked by exactly one white piece (usually a pawn) and multiple black pieces, often on the 5th or 6th rank, indicating a potential pawn push or sacrifice.",
"sae_13119": "A queen on an open square, attacked by one enemy piece, and not defended by any friendly pieces.",
"sae_12868": "White pawn on the 3rd rank (a3\u2013c3) that is not under immediate black attack, in a mateIn1 or hookMate endgame pattern.",
"sae_12857": "White's g2 pawn is undefended by white pieces and attacked by no black pieces, often with a white king on g1.",
"sae_13132": "This feature detects a king on a square that is not attacked by any piece, with at least one friendly pawn on an adjacent square.",
"sae_13159": "The feature activates when a white pawn attacks an empty square, which is also attacked by at least one black piece.",
"sae_13178": "Black bishop actively placed in an endgame, often contesting the same diagonal or file as a white bishop or rook.",
"sae_13195": "The feature detects a Black pawn on the 7th rank (a7 or b7) that is undefended by other Black pieces and is either undefended by White or attacked by a single White piece.",
"sae_13207": "Black rook in an active endgame position, often supporting a skewer or back-rank threat.",
"sae_12936": "The feature detects a black rook on the second rank, undefended by white, with no white pieces on the target square.",
"sae_13268": "A white bishop on b3 or g3, attacked by one black piece, and defended by at least two white pieces.",
"sae_13260": "A queen occupying an uncontested square, free from enemy pressure, often in a position where it can launch or support a decisive attack.",
"sae_13261": "A queen is attacked by an enemy piece, and the queen is the only piece on the target square.",
"sae_13281": "A king on the back rank or near-corner square that is attacked by at least one enemy piece with no friendly defenders.",
"sae_13288": "A black queen on the first rank, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_13289": "A black pawn on the a-file or h-file is attacked by at least one black piece and no white pieces.",
"sae_13294": "A white Queen is attacking a square occupied by a black Queen, which is undefended by black pieces.",
"sae_13296": "A square is attacked by one white piece and one black piece, with the black king often nearby.",
"sae_13298": "This feature detects empty squares on the first rank that are attacked by both sides, especially when the king is nearby.",
"sae_13301": "White King and Queen are on the same rank or file, with the target square on that same rank/file, and the Black King is also on that rank/file, but not between the White King and Queen.",
"sae_13302": "The feature detects an empty corner square (a1, h1, e1, d1) that is not attacked by the side to move, often with the king of the side to move nearby.",
"sae_13308": "A black bishop on g4 (or b4) that is attacked by a black pawn, or is undefended, and is not attacked by any white pieces.",
"sae_13330": "This feature detects a queen on a square that is attacked by both sides, with the attacking piece for the side to move being a queen.",
"sae_13325": "A white-attacked black bishop on a central square (d3, d5, f4, a5) that is also attacked by at least one black piece.",
"sae_13311": "A white pawn on a central square (d4, d5, e4, c4, c3, d2) that is attacked by at least two white pieces and zero or one black pieces.",
"sae_12344": "Detects a black queen on the first rank, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_12302": "The feature detects a king on the back rank, with a friendly pawn on the 7th rank, and the target square is on the back rank.",
"sae_13335": "The feature detects a queen on a square that is attacked by both sides, with the side to move having at least one attacker.",
"sae_12377": "Detects a king on the 4th rank or higher, with a pawn on the 3rd rank, and the target square is a square on the 3rd rank adjacent to the pawn.",
"sae_13343": "This feature detects a black pawn on the 6th or 7th rank that is attacked by a black piece and not attacked by a white piece, with a white king nearby.",
"sae_12391": "The feature detects a king on the 7th or 8th rank, with the target square being a corner square on the 8th rank, and no pieces on the target square.",
"sae_12903": "White rook actively centralised or on an advanced rank, supporting a passed pawn or restricting the enemy king.",
"sae_12448": "Detects a pawn on the 6th rank (a6, h6, h5) that is attacked by at least one black piece, often with no white defenders.",
"sae_13365": "A white knight on an outpost or advanced square that has more white defenders than black attackers.",
"sae_13367": "White's rook on a1 is undefended and not attacked, with the white king on e1 or f1, and the b1 square is occupied by a knight or bishop.",
"sae_12498": "A pawn on the 7th rank, one square away from promotion, with no enemy pieces on the target square.",
"sae_13398": "The feature detects an empty square on the first rank (c1 or d1) that is attacked by at least one white piece and not attacked by any black pieces.",
"sae_12575": "Detects a white pawn on the 2nd or 3rd rank that is undefended by white and attacked by at least one black piece.",
"sae_12436": "A white knight on the 4th or 5th rank, attacked by at least one black piece, and defended by at least one white piece.",
"sae_13450": "White bishop on g2, attacked by 0-1 black pieces, and defended by 1 white piece, with white to move.",
"sae_12553": "Detects a black rook or queen on the 2nd or 3rd rank, with no white attackers on that square.",
"sae_13418": "A rook on its starting square (a8 or h8) on the back rank, with a pawn on the second rank in front of it, and no other pieces on the back rank.",
"sae_12554": "The feature detects a pawn on the 5th rank (for white) attacking a square on the 6th rank that is defended by multiple enemy pieces.",
"sae_12568": "Detects a queen on the first rank, attacked by at least one enemy piece, with no friendly defenders.",
"sae_12892": "A white queen attacks a square that is also attacked by a black piece, with the white king nearby.",
"sae_12550": "A white knight attacking an undefended or singly defended square on the 6th or 7th rank.",
"sae_12578": "Detects a king on the 7th rank, with a pawn on the 6th rank, and the target square being the 8th rank, often with a pawn on the 7th rank.",
"sae_13371": "The feature detects a pawn on f7 or g7 that is attacked by a black piece and not defended by a white piece, often with the white king nearby.",
"sae_12556": "Detects an undefended black rook on the back rank (7th or 8th rank from white's perspective).",
"sae_13455": "White queen active on 7th rank or long diagonal with mate-in-1 or mate-in-2 threat, typically in middlegame or endgame.",
"sae_13478": "A queen is attacked by an opponent's piece, and the queen is the only piece on that square.",
"sae_13460": "The feature detects a square that is attacked by at least two white pieces and defended by exactly one black piece, where the target square is often on the 6th or 7th rank.",
"sae_13492": "White's rook on the 1st rank attacks a black rook on the 8th rank, with the black rook being defended by at least one other black piece.",
"sae_13434": "A white piece (often a rook) is attacking a square on the back rank (h1, g1, f2, g2) that is also attacked by two black pieces, often with the white king nearby.",
"sae_13500": "A pawn on the 2nd or 3rd rank that is undefended by its own side, often attacked by the opponent, and sometimes blocking a friendly king.",
"sae_12697": "White pawn on the 2nd, 3rd, or 4th rank, attacked by a white piece and not attacked by a black piece.",
"sae_13502": "Detects a queen on the first rank, attacked by an enemy piece, with no friendly defenders.",
"sae_12679": "White Queen on d1, attacked by at least two white pieces, and not attacked by any black pieces.",
"sae_13494": "A square is attacked by two black pieces and at most one white piece, with the target square being a pawn push or a square near the king.",
"sae_13535": "Detects a king on the back rank, especially when it is the only piece on that rank and is attacked by a rook.",
"sae_13512": "This feature detects a king on the same rank or file as a rook, with the target square being the corner square on that rank/file, and no pieces between the king and the target square.",
"sae_13521": "This feature detects a bishop on a square that is attacked by both sides, with the white bishop being attacked by a black pawn or knight, and the white bishop attacking a black pawn or knight.",
"sae_13542": "Detects a black queen on a square attacked by at least one black piece, but not by any white pieces.",
"sae_13583": "The feature detects squares on the 6th rank (for white) that are attacked by both sides, with black having at least as many attackers as white.",
"sae_13581": "A black knight posted on a central or semi-central square (c4\u2013f5 region), regardless of white pressure.",
"sae_12717": "White's rook or queen attacks a square on the h-file, often h1, h2, or h3, with no black attackers.",
"sae_13516": "A white pawn on the 5th rank attacks an empty square on the 6th rank, which is also attacked by at least one black piece.",
"sae_13577": "A pawn on the 2nd rank is attacked by one white piece and one black piece, with white to move.",
"sae_12716": "Detects a pawn on the 4th, 5th, or 6th rank that is attacked by at least one enemy piece and defended by at least one friendly piece.",
"sae_13593": "A white piece (Rook or Knight) is attacked by at least one black piece and defended by at least one white piece, with the target square being on the 2nd or 3rd rank.",
"sae_13568": "A pawn on the 5th rank (d5, g6, h5) that is attacked by at least two white pieces and defended by at least one black piece.",
"sae_13591": "A square on the 3rd or 4th rank that is attacked by 2 black pieces and 0 or 1 white pieces.",
"sae_13559": "White Queen attacking a square in the vicinity of the Black King, especially on the 6th, 7th, or 8th ranks.",
"sae_13553": "A white piece attacks a black rook on a square where the rook is the only piece, and the rook is not defended.",
"sae_12759": "White has pieces defending the king's starting zone (back rank) while black has no attackers on that zone.",
"sae_13608": "The King is attacked by exactly one black piece, and the King is on the first rank.",
"sae_12750": "This feature detects a pawn on the 4th or 5th rank that is attacked by at least two enemy pieces and defended by at least one friendly piece.",
"sae_13662": "A white pawn on the 7th rank (or 6th rank in one case) is attacking a square on the 8th rank, which is a potential promotion square.",
"sae_13674": "A white bishop on the 3rd or 4th rank, on a light square, with no immediate attackers or defenders.",
"sae_13580": "This feature detects a queen on a square attacked by at least one friendly piece and not attacked by any enemy pieces.",
"sae_13691": "This feature detects a white pawn on d5, which is attacked by black pieces and defended by white pieces, with white having at least as many attackers as black.",
"sae_13715": "White King on the back rank, with a pawn on the 7th rank, and a target square on the 7th rank.",
"sae_13690": "The feature detects a black bishop on g7 or h7, attacked only by a black piece, with white to move.",
"sae_13763": "White bishop on g2, attacked by a white piece, with no black attackers.",
"sae_13687": "This feature detects squares on the back rank that are attacked by an opponent's piece and defended by a friendly piece, often with the king on an adjacent square.",
"sae_13727": "The feature detects a knight on f5 or e4/f4 that is attacked by more enemy pieces than friendly pieces, or an empty square on f4/e4/f5 that is attacked by more enemy pieces than friendly pieces.",
"sae_13755": "This feature detects squares attacked by exactly one white piece and at least one black piece, with the target square being empty.",
"sae_13733": "A pawn on the 3rd rank (a3 or h3) with no attackers, and the king of the side-to-move is on the 1st or 2nd rank.",
"sae_13752": "White pawn on the 7th rank attacking an empty square on the 8th rank.",
"sae_13759": "A square on the 6th rank is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_13802": "The feature detects an empty square on the 2nd or 3rd rank, attacked by exactly 3 white pieces and 0 black pieces.",
"sae_13818": "A white piece attacks a square, and a black king is on an adjacent square.",
"sae_13767": "Black king on its original square (e8 or f8) is attacked by at least two black pieces, with no white attackers.",
"sae_13793": "This feature detects a piece on the back rank that is attacked by an opponent's piece and not defended by a friendly piece.",
"sae_13734": "A pawn on its starting square (2nd rank for White, 7th for Black) that is attacked by at least one enemy piece and defended by at least one friendly piece.",
"sae_13748": "The feature detects a king on the back rank, with a pawn on the 7th rank blocking the king's escape.",
"sae_13782": "The feature detects squares on the 7th or 8th rank that are attacked by a black piece, especially when the square is empty and the king is nearby.",
"sae_13844": "The feature activates for squares in the center (d5/e5) that are attacked by at least two white pieces, with white having at least as many attackers as black.",
"sae_13827": "This feature detects a white pawn on the 2nd, 3rd, or 5th rank that is attacked by a white bishop and not attacked by any black pieces.",
"sae_13853": "The feature detects squares attacked by a white pawn on the 7th rank, especially if the square is empty and attacked by a black piece.",
"sae_13856": "This feature detects a knight on the 2nd or 3rd rank that is attacked by at least two white pieces and not attacked by any black pieces.",
"sae_13099": "Black's king is castled kingside, and the h8 square is attacked by a black piece, with no white attackers, indicating a potential weakness or target for white.",
"sae_13848": "The feature detects a knight on a central square (e3, e4, f6, c6) that is attacked by at least one white piece and at least one black piece, with white to move.",
"sae_13881": "Black king on g8 attacked by at least one black piece, with no white attackers.",
"sae_13859": "This feature detects squares attacked by a black queen on d4, specifically those on the 2nd, 3rd, 4th, and 5th ranks.",
"sae_12886": "A queen is on the target square, attacked by at least one black piece, and not defended by any white pieces.",
"sae_13858": "A white queen attacking a black queen that is also attacked by a black piece, with the white queen on a central square (d4, e4, d5, e5) or a square adjacent to the center.",
"sae_13833": "Detects a pawn on the 2nd rank that can advance two squares, especially if it attacks a square on the 4th rank.",
"sae_13908": "Detects a pawn on the 6th or 7th rank (for white) that is attacked by at least one black piece and not defended by any white pieces.",
"sae_13913": "An advanced pawn on the 4th\u20135th rank adjacent to (but not necessarily directly in front of) the king, in a king-and-pawn endgame with zugzwang themes.",
"sae_14012": "This feature detects a black pawn on the 6th or 7th rank that is attacked by a black piece and not attacked by a white piece.",
"sae_12991": "A square on the 6th rank is attacked by a white pawn and at least one black piece.",
"sae_13970": "This feature detects a white piece attacking a black bishop, where the bishop is the only piece on its square.",
"sae_13929": "A knight is trapped or hanging with no safe retreat, making it a target for immediate material gain.",
"sae_13981": "A white pawn on the 2nd, 3rd or 4th rank is attacked by at least one black piece, and defended by at least one white piece.",
"sae_13001": "White attacks a pawnless square on the 7th rank, which is defended by a black piece, often a king.",
"sae_13996": "The feature detects an empty square on the first rank that is not attacked by the side to move, and is a potential castling square for the king.",
"sae_13963": "Black pawn on a semi-advanced rank in a pawn endgame, potentially a candidate passer or blocker.",
"sae_14025": "The feature detects a pawn on the 2nd rank (for the side to move) that is attacked by at least one friendly piece and at most one enemy piece.",
"sae_13473": "Detects a black queen on the first rank, especially when it's undefended or attacked by black pieces.",
"sae_13928": "The feature detects a rook on the same rank as the king, attacking a square on the back rank or second rank, where the king is not on the back rank.",
"sae_14042": "Detects a king on the back rank in a position with active mating threats from an enemy piece, regardless of whether friendly pieces are adjacent.",
"sae_14090": "This feature detects a white knight on f3 or c3, attacked by 0 black pieces, and defended by at least one white piece.",
"sae_14085": "The feature detects squares on the 7th rank that are attacked by a black pawn and not attacked by any white pieces, often near the black king.",
"sae_14063": "A knight attacking an empty square, especially on the 6th, 7th, or 8th rank, with no enemy defenders.",
"sae_13985": "White bishop on the a1-h8 diagonal, attacking a pawn on h7, or a white rook on the 1st rank.",
"sae_14065": "Detects squares on the back rank that are attacked by a bishop on the long diagonal.",
"sae_14030": "A pawn on the 5th rank (for white) or 4th rank (for black) is attacking an empty square on the 6th rank (for white) or 3rd rank (for black), which is also attacked by a friendly king.",
"sae_14099": "This feature detects empty squares on the back rank (rank 8 for white, rank 1 for black) that are not attacked by the side to move.",
"sae_14095": "The feature detects a pawn on the 2nd rank (b2, g2, h2) that is attacked by an enemy piece and undefended by friendly pieces.",
"sae_14119": "A rook on the 4th, 5th, 7th, or 8th rank that is attacked by an enemy piece and not defended by a friendly piece.",
"sae_14046": "The feature activates for the corner squares a1 or h1 when they are empty, undefended, and the king of the side to move is on the same rank as the target square, with a rook of the side to move on the same file as the target square.",
"sae_13091": "This feature detects a white pawn on the 7th rank, with the target square being a promotion square on the 8th rank.",
"sae_14102": "White's King-side pawn (f2, g2, g4) is attacked by a black piece and defended by a white piece, with a white Rook often involved in the defense.",
"sae_14134": "A white piece attacks a black knight on the 6th rank, which is also attacked by at least one black piece.",
"sae_13055": "Detects a pawn on the 6th or 7th rank that is undefended by the side to move, and is either undefended by the opponent or defended by a single opponent piece.",
"sae_14176": "King actively navigating in an endgame where passed pawns create promotion threats on both flanks.",
"sae_14152": "This feature detects an empty square on the first rank that is attacked by a white bishop on the a-file or b-file, with no other pieces on the first rank.",
"sae_14104": "The feature detects a king on the back rank (7th or 8th) with a pawn on the adjacent file (h-file for g7, g-file for h7) and no friendly pieces defending the target square, which is attacked by an enemy piece.",
"sae_13096": "Detects an empty square on the 2nd rank (g2 or c2) that is attacked by exactly one white piece and zero black pieces, often a pawn.",
"sae_14174": "A square that is attacked by a black piece, and is either undefended by white or defended by fewer white pieces than black pieces.",
"sae_14183": "The feature detects squares attacked by exactly one white piece and exactly one black piece, with a preference for squares on the 7th rank.",
"sae_14249": "Detects a black rook or queen on the 7th or 8th rank, undefended by black pieces, and not attacked by white pieces.",
"sae_14199": "The feature detects squares that are one step away from the enemy king, but not directly attacked by any piece.",
"sae_14212": "This feature detects a rook or queen on the opponent's back rank that is attacked by one of your pieces and defended by one of their pieces.",
"sae_13932": "The feature detects a pawn on the second rank (a2 or h2) that is defended by at least one white piece and is either undefended or attacked by at most one black piece.",
"sae_14213": "This feature detects a bishop on a square that is attacked by White and either not attacked or attacked by only one Black piece.",
"sae_14145": "A white piece (often a knight or queen) attacks a black piece (often a knight or rook) on the 5th, 6th, 7th, or 8th rank, with no black defenders.",
"sae_14294": "The feature detects a white pawn on the 3rd or 4th rank that is attacked by exactly one white piece (the white king) and zero black pieces, with the black king nearby.",
"sae_14094": "White bishop on the a2-g8 diagonal, with a black king on d4, d5, or d6, and a black knight on e6, f6, or g6, where the target square g8 is empty and not attacked by either side.",
"sae_14267": "White rook on the 7th rank, with the black king on the 8th rank and a black pawn on the 7th rank, creating a back-rank mate threat.",
"sae_14252": "White Queen attacking a square on the back rank, with the Black King on the same back rank, and no Black pieces defending the target square.",
"sae_14299": "A black rook on the back rank (1st or 8th) that is not attacked by white pieces.",
"sae_14316": "White king is on the 7th or 8th rank, and the black king is on the 6th, 7th, or 8th rank, with no pieces between them on the same file.",
"sae_14296": "The feature detects a pawn on the 7th rank (for the side to move) that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_14260": "White Bishop attacking a1, which is empty and undefended by Black.",
"sae_14349": "The feature detects a king on the target square that is attacked by exactly one black piece and defended by at most one white piece.",
"sae_14340": "A white rook on its starting square (a1, c1, d1, or e1) is attacked by exactly one white piece and exactly one black piece.",
"sae_14352": "A white bishop on a square that is attacked by at least one black piece and defended by at least one white piece.",
"sae_14335": "The feature detects an empty square on the first rank that is adjacent to the king and is not attacked by the opponent.",
"sae_14367": "A black pawn on the 5th rank is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_14334": "The feature detects a king on the 6th or 7th rank, with a pawn on an adjacent file on the 7th rank, and a bishop on the same color as the pawn, on the 6th or 7th rank, attacking the pawn.",
"sae_14339": "Detects a black king on the back rank (g8/h8) or 7th rank (g7) that is attacked by a black piece, with no white attackers.",
"sae_14378": "The feature detects a white pawn on g2 or g3, attacking h3, with h3 being attacked by a black piece (often a knight or bishop).",
"sae_14312": "A piece \u2014 often a rook or queen \u2014 directly threatens a square adjacent to the enemy king, setting up a forced mate or king escape restriction.",
"sae_14370": "A white pawn on the 4th rank (d4 or c4) attacks a square on the 6th rank (c6 or g6) that is attacked by multiple black pieces.",
"sae_14369": "The feature detects squares on the 3rd or 6th rank that are undefended by pawns and are potential targets for a king or rook to move to, often in endgames or open positions.",
"sae_14379": "The feature detects squares on the 6th rank (for white) that are attacked by at least one white piece and at least one black piece, with black having more attackers than white.",
"sae_14423": "A white rook is on the back rank, attacked by a black piece, and not defended by a white piece.",
"sae_14395": "White's rook is attacked by a black piece, and white has at least as many attackers as black on the rook's square.",
"sae_14382": "The feature detects an empty square on the first rank that is attacked by a black pawn, with the white king nearby.",
"sae_14427": "White King on g1, attacked by 1-2 white pieces, with no black attackers.",
"sae_14341": "This feature detects a square that is attacked by one white piece and at least one black piece, where the square is on the 6th rank and is not occupied by a piece.",
"sae_14465": "This feature detects a square that is attacked by White and undefended by Black, often near the Black king, with the target square being empty.",
"sae_14463": "This feature detects a black piece (especially a bishop or rook) on the first or second rank, which is not attacked by white pieces.",
"sae_14443": "The feature detects a square that is attacked by a black bishop and is either undefended by white or defended by a white pawn.",
"sae_14458": "A white bishop on its starting square (c1 or f1) that is attacked by white pieces and not attacked by black pieces.",
"sae_13170": "Detects a black king on the back rank (8th rank) with a black rook on f8, and the g8 square is attacked by a black piece.",
"sae_14466": "Black bishop on the 8th rank, undeveloped or retreated to the back rank.",
"sae_14456": "A square on the 5th or 6th rank that is attacked by White and not attacked or attacked by fewer Black pieces.",
"sae_13256": "Detects a white piece on the 1st or 2nd rank that is attacked by one black piece and defended by at least one white piece.",
"sae_14573": "A black queen on the first rank, attacked by at least one black piece, with the white king nearby.",
"sae_14477": "Rook endgame with an advanced passed pawn and active rooks, where a quiet rook or king move secures the advantage.",
"sae_14488": "The feature detects empty squares on the 8th rank that are not attacked by the opponent, especially when the king is nearby.",
"sae_14476": "Black's castled king's rook on its starting square (a8 or h8) is undefended by any black pieces and unattacked by any white pieces.",
"sae_14393": "Black king on the back rank (7th or 8th) is attacked by at least one black piece, but not by any white pieces.",
"sae_14495": "A white pawn on the 5th rank (P) attacks a square on the 6th rank, which is attacked by multiple black pieces.",
"sae_14425": "This feature detects a queen on the target square that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_14484": "A white king-side pawn (g2 or h2) or a white rook on a1 is attacked by at least one black piece, and defended by at least one white piece, with the target square being empty.",
"sae_14540": "Detects a target square on the 7th or 8th rank that is adjacent to the opponent's king and is not attacked by the side to move.",
"sae_14544": "The white king on e1 is attacked by at least one black piece and defended by at least two white pieces.",
"sae_14536": "This feature detects a piece (often a knight or rook) on a central square (c3, e5, f4, f6, g5) that is attacked by one white piece and at least one black piece.",
"sae_14553": "This feature detects a pawn on the 2nd or 3rd rank (from its side) that is attacked by at least one enemy piece and is either undefended or defended by fewer pieces than it is attacked.",
"sae_14555": "A pawn on d5 or e5 (or f6) that is attacked by Black and defended by White, with Black having at least as many attackers as White has defenders.",
"sae_14635": "This feature detects squares on the 7th rank that are attacked by at least two black pieces and not attacked by any white pieces.",
"sae_14589": "This feature detects a white bishop on the 4th or 5th rank, often on the kingside, that is either undefended or defended by a white piece, and is not attacked by any black pieces.",
"sae_14604": "The feature detects squares on the back rank that are attacked by a white pawn on the 7th rank, with the black king nearby.",
"sae_14614": "This feature detects a pawn on the 7th rank (for white) or 2nd rank (for black) that is not attacked by the opponent.",
"sae_14629": "White Queen on d1, attacked by 1-3 white pieces and 0 black pieces.",
"sae_14475": "Detects a pawn on the 4th or 5th rank that is attacked by at least one enemy piece and defended by at most one friendly piece.",
"sae_14651": "A white pawn on g2 or h2 is attacked by exactly one white piece and zero black pieces.",
"sae_14602": "A white rook or queen attacks an empty square on the back rank, with no black pieces defending it.",
"sae_14597": "A pawn on the 4th, 5th, or 6th rank that is attacked by both sides, with the attacking pieces being a mix of pawns and minor pieces.",
"sae_14619": "The feature detects a pawn that is attacked by one enemy piece and defended by at least two friendly pieces, with the side to move being the defender.",
"sae_14652": "This feature detects a queen on the target square that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_14659": "A rook on its starting square (a1 or h1) with no pieces on the second rank in front of it, and no immediate attackers.",
"sae_14675": "The feature activates for a pawn on the 7th rank, one square away from the target square on the 8th rank, with no enemy pieces on the 7th rank blocking its path to promotion.",
"sae_14707": "This feature detects a queen on a square attacked by exactly one friendly piece and no enemy pieces.",
"sae_14720": "This feature detects a white bishop on a square attacked by two white pieces and zero or one black piece.",
"sae_14587": "The feature detects an empty square on the first rank (f1, g1, b1) that is attacked by at least two white pieces and not attacked by any black pieces, often indicating a safe square for the king to castle or move to.",
"sae_14735": "This feature detects a pawn that is attacked by an opponent's pawn and defended by at least one friendly piece, often a pawn.",
"sae_14730": "This feature detects a knight on a central square (d5, c3, f3) that is attacked by at least one enemy piece and defended by at least one friendly piece, often with an equal or favorable attack/defense ratio for the side to move.",
"sae_14744": "A white bishop attacking a square on the back rank (or 7th rank) that is also attacked by at least one black piece.",
"sae_14703": "White's queen or rook attacks an empty square on the back rank, often contested by a black piece.",
"sae_14761": "This feature detects a White Rook on the 7th rank (or 6th rank if the target square is a5 or g6) that is not attacked by Black pieces, often with a King nearby.",
"sae_14736": "This feature detects a square on the 7th rank (or 2nd rank for Black) that is attacked by one of the opponent's pawns and is either undefended or defended by only one of the player's pawns, often with a king nearby.",
"sae_14749": "White's light-squared bishop (or queen) attacks h5/h6, often with a pawn on g4/g5 or f4/f5.",
"sae_14733": "White pawn on a2/b2/g2 that is undefended and not attacked by black, often in an endgame.",
"sae_14759": "Black king on the back rank (7th or 8th) with no white attackers on h8, and at least one black attacker on h8.",
"sae_14804": "Detects a black rook on the back rank (7th or 8th) that is not attacked by white pieces.",
"sae_14771": "White's a1 rook is undefended and attacked by a black knight on b3, c2, or d2.",
"sae_14766": "White King on e1, attacked by 1-3 white pieces, and 0 black pieces.",
"sae_14776": "A square is attacked by both sides, with the target square being empty or occupied by a pawn, and the attacking piece is a knight or a bishop.",
"sae_14716": "The feature detects a vacant square attacked by at least two white pieces and at most one black piece, where the square is on the 4th, 5th, or 6th rank.",
"sae_14775": "Black's queen's bishop is on c8, attacked by at least two black pieces, and not attacked by any white pieces.",
"sae_14855": "The feature detects a pawn on the 3rd or 4th rank that is attacked by at least one enemy piece and defended by at most one friendly piece, with the attacking side to move.",
"sae_14764": "A queen attacking a square defended by a king, where the king is on an adjacent square to the target.",
"sae_14857": "A white piece directly attacking a loose black major piece, often as a forcing tactic in an endgame or simplification sequence.",
"sae_14858": "The feature detects squares on the kingside (g1, g3, h1, e1) that are attacked by at least one white piece, often a rook or queen, and are not attacked by black pieces.",
"sae_14777": "Detects a black bishop on the kingside (f7, g7, h7) or queenside (a7, b7, c7) that is undefended or lightly defended by black pieces, and not attacked by white pieces.",
"sae_14859": "This feature detects squares attacked by a white Queen on the 6th rank, especially those on the kingside or near the opponent's king.",
"sae_13510": "Detects contested squares where white holds equal or superior control, primarily in pawn and bishop endgames with king centralisation.",
"sae_14843": "The feature detects a friendly knight on its starting square (b1 or g1 for white, b8 or g8 for black) that is attacked only by friendly pieces.",
"sae_14863": "This feature detects a Knight on the back rank (1st or 8th) or 7th rank, especially if it's the only piece on that square or has few attackers.",
"sae_14901": "White queen attacked by exactly one white piece, with no black attackers.",
"sae_14881": "A Queen is attacked by a friendly piece, and is on a square that is not attacked by the opponent.",
"sae_14898": "Advanced passed pawn close to promotion with active rook support.",
"sae_13333": "A white king is on the first rank, and a white rook is attacking a target square on the first rank, which is also attacked by a black rook.",
"sae_14871": "A white piece attacks a square on the 3rd rank, with no black pieces attacking that square.",
"sae_14983": "A pawn on the 7th rank that is not attacked by the opponent and is either undefended or defended by a single piece.",
"sae_14991": "A rook on its starting square (a1 or h1) that is not attacked by the opponent and is not defended by its own side.",
"sae_14971": "White's Queen attacks a square on the 7th or 8th rank, which is defended by at least one black piece.",
"sae_14947": "White attacks a black bishop on the 6th or 7th rank, which is also attacked by at least one black piece.",
"sae_15030": "The feature detects a black rook on the first or second rank, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_14970": "The feature detects a white knight attacking the h3 square, which is also attacked by a black pawn, with no piece on h3.",
"sae_14995": "White attacks an undefended black piece (excluding pawns) with at least one white piece, where the target square is not on the first rank.",
"sae_13421": "Detects a king on the back rank, especially when the target square is a back-rank square near the king, and there is a queen nearby.",
"sae_15054": "The feature detects a white pawn on the 7th rank (or 2nd rank for black) that is blocked by a friendly piece, preventing it from promoting.",
"sae_15044": "This feature detects a king on the back rank or a rank adjacent to it, with a rook on the same rank as the king, and no pieces between them.",
"sae_15130": "The feature detects a square attacked by White, but more heavily defended by Black, often on the 6th rank.",
"sae_15102": "Black's king-side rook is on its starting square (f8 or a8) and is attacked by at least one black piece, but not by any white pieces.",
"sae_14949": "Detects a queen on the back rank (7th or 8th) that is not attacked by the opponent, especially when the king is on the back rank.",
"sae_15115": "A pawn on d4 or e4 (center) that is attacked by at least two enemy pieces and defended by at most one friendly piece.",
"sae_15114": "A white queen attacking a black rook on an open file/rank, where the rook is either undefended or defended by one piece.",
"sae_15078": "White king is adjacent to the black king, with no pieces between them.",
"sae_15127": "The feature detects squares attacked by at least two white pieces, where the target square is occupied by a black piece, and the number of white attackers is greater than or equal to the number of black attackers.",
"sae_15088": "Black's back rank is undefended by pawns, and the target square is a back-rank square (d8, f8, g8) attacked by multiple black pieces.",
"sae_15152": "A pawn on the 2nd, 3rd, or 4th rank, attacked by no black pieces, and attacked by at least one white piece (or no white pieces if it's on the 2nd rank).",
"sae_15236": "A king on the back rank or adjacent to it, with a pawn on the square in front of it, and the target square being the corner square on the same back rank.",
"sae_15104": "This feature detects a black queen on the same rank or file as the white king, with no white pieces between them, indicating a potential discovered attack or skewer.",
"sae_15248": "A white pawn on the 5th rank attacks an empty square on the 6th rank, which is also attacked by at least one black piece.",
"sae_15274": "The king is on the target square, and it is not attacked by the opponent.",
"sae_15158": "The feature detects a white queen attacking a square on the back rank (7th or 8th) that is defended by a black king or rook, often with a pawn on the 7th rank.",
"sae_15280": "A square that is attacked by at least two black pieces and at most one white piece, with the target square often being occupied by a black knight.",
"sae_15211": "A pawn on the 2nd or 3rd rank, on the a, b, or c file, that is not attacked by the opponent.",
"sae_15304": "A queen is attacked by one enemy piece and defended by zero friendly pieces.",
"sae_15287": "A black pawn on the 7th rank (a7, c7, g7, h7) that is either undefended or defended by a single black piece, and is attacked by at most one white piece.",
"sae_15291": "A square that is attacked by both sides, with the attacking side having at least as many attackers as the defending side, and the square is on the c-file or f-file.",
"sae_15350": "A white rook or bishop attacks a square on the 2nd rank, which is also attacked by a black pawn, with the white king on the 1st rank.",
"sae_13689": "Detects king-and-pawn endgames with kings in opposition or near-opposition, where one king is making a breakthrough.",
"sae_15293": "White pawn on the 7th rank, regardless of attack/defense, especially if it's a passed pawn.",
"sae_15285": "Bishop endgame with contested pawn chain and an exposed king, requiring precise defensive or breakthrough calculation.",
"sae_15383": "A white queen is attacked by one black piece and defended by one white piece, and the queen is on a square where it can capture a black piece.",
"sae_15364": "A square on the first rank is attacked by a black piece, with no white attackers, and a white queen is present on the board.",
"sae_15341": "A queen is attacked by at least one white piece, and is the only piece on the target square.",
"sae_15399": "Detects a black queen on a square attacked by 0 white pieces and 0-4 black pieces, often on the 6th or 7th rank.",
"sae_13698": "This feature detects a white pawn on e5 or g4/g3 that is attacked by black pieces and defended by white pieces, often with a net negative attack count for white.",
"sae_15385": "This feature detects a black knight on the 8th rank, especially in a corner, that is not attacked by white pieces.",
"sae_13732": "Pawn endgame with a blocked or semi-blocked pawn majority on one wing, where zugzwang or king triangulation determines the outcome.",
"sae_15403": "A queen on the 7th or 8th rank, attacking a square on the 7th or 8th rank, with the king on the 7th or 8th rank.",
"sae_15407": "A queen is on the target square, attacked by at least one enemy piece, and not defended by any friendly pieces.",
"sae_15362": "The feature detects a square that is attacked by the side to move, and is also attacked by at least two opponent pieces, with the square being empty.",
"sae_15420": "The feature detects a king on the first rank, with a friendly piece on the second rank that can move to the first rank, and the target square is on the first rank.",
"sae_15429": "A king (either colour) is in an endgame position where back-rank weakness or rook activity on open files creates decisive tactical threats.",
"sae_15438": "The feature detects a pawn on the 7th rank (for white) or 2nd rank (for black) that is one square away from promotion, with the target square being the promotion square.",
"sae_15478": "An undefended square on the 6th rank (for White) that is attacked by at least one Black piece.",
"sae_15489": "A square is heavily attacked by black pieces and undefended by white pieces.",
"sae_15487": "White Queen on the 6th or 7th rank, attacked by at least one white piece and zero black pieces.",
"sae_15505": "A white Queen is on its starting square (d1) or a central square (c4, d3, e2, d5) and is attacked by at least one white piece, with no black attackers.",
"sae_15574": "A white queen is attacked by at least one white piece, and not attacked by any black pieces.",
"sae_15579": "This feature detects a piece on b1 or g1 that is attacked by the opponent, especially a queen on g1 or a knight on b1.",
"sae_15498": "A queen is attacked by at least one enemy piece, and is not defended by any friendly pieces.",
"sae_13920": "Detects squares on the 4th or 5th rank that are attacked by at least one black piece and defended by at most one white piece.",
"sae_15582": "White king adjacent to or within reach of squares controlled by black pawns, in a complex pawn (or bishop-and-pawn) endgame requiring precise king navigation.",
"sae_15534": "The feature activates when a pawn is on the 7th rank, and the target square is the promotion square on the 8th rank, with no pieces on the target square.",
"sae_15467": "White Queen attacking an undefended Black Queen.",
"sae_15603": "The feature detects a square attacked by at least 3 white pieces and at most 1 black piece, often a pawn on the 5th rank.",
"sae_15619": "A pawn on the 6th or 7th rank (for white) or 2nd or 3rd rank (for black) that is undefended and not attacked, often on the kingside.",
"sae_15531": "The feature detects an empty square on the first rank (for the side to move) that is not attacked by the side to move, often with a king nearby, suggesting a potential castling square or a square for king safety.",
"sae_15621": "This feature detects a black rook on its starting square (a8 or h8) that is undefended by black pieces and not attacked by white pieces.",
"sae_15685": "Detects a black queen on the 8th rank, not attacked by white pieces, with at least one black attacker.",
"sae_15625": "An advanced pawn on the 5th, 6th, or 7th rank that is not under immediate attack by the opponent, in an endgame context.",
"sae_15647": "The feature detects a pawn on the 2nd or 3rd rank that is attacked by at least one enemy piece and undefended by friendly pieces.",
"sae_15661": "A square on the 7th rank (or 2nd for Black) that is attacked by one white piece and one black piece, with the target square being empty.",
"sae_14239": "White king on the first rank, attacked by one white piece, with no black attackers.",
"sae_15648": "The feature detects a target square on the 6th, 7th, or 8th rank that is attacked by an enemy queen and is either undefended or defended by only one piece.",
"sae_15669": "This feature detects a square that is attacked by one white piece and one black piece, where the white piece is a Queen, Rook, or Bishop, and the black piece is a Pawn or King, and the square is on the 7th rank for white or 2nd rank for black.",
"sae_15696": "A white queen attacking a black queen, with the black queen also being attacked by a black piece.",
"sae_15699": "The feature detects a white pawn on the 4th rank, especially on the a-file, that is attacked by at least one black piece and defended by at least one white piece.",
"sae_15716": "White's king is on the same rank as a black pawn on the 6th or 7th rank, with no pieces between them, and the pawn is not attacked.",
"sae_15707": "This feature detects a black bishop that is attacked by white, but not defended by black, and is located on a square where it is the only piece of its color.",
"sae_15713": "Detects a Queen on a square that is attacked by at least one friendly piece and not attacked by any enemy pieces, often with the Queen on the back rank or near the enemy king.",
"sae_15717": "The feature detects a king on the 2nd rank, with a rook on the same rank, and the target square is on the 1st or 2nd rank, adjacent to the king.",
"sae_15740": "A pawn on the 6th rank (for white) or 3rd rank (for black) that is attacked by at least one enemy piece and defended by at least one friendly piece.",
"sae_15724": "Detects an empty square on the 8th rank (a8, b8, or c8) that is not attacked by either side, with the black king nearby.",
"sae_15743": "White's king rook is on its starting square (c1/d1/e1) and is heavily defended by white pieces, with no black attackers.",
"sae_15735": "A white pawn on the 4th rank (d4, f4, a4) that is attacked by at least one black piece and defended by at least two white pieces.",
"sae_15747": "White's king is castled kingside, and the h1 square is attacked by at least one white piece, with no black attackers.",
"sae_15781": "A pawn on the 2nd, 3rd, or 4th rank that is attacked by an enemy piece and undefended by a friendly piece.",
"sae_14438": "A bishop on a light square is attacked by one enemy piece and defended by one friendly piece.",
"sae_14436": "Black's king is on g8 and is attacked by at least one black piece, while white has no attackers on g8.",
"sae_15783": "The feature detects the b8 square being attacked by at least one black piece, with no white attackers.",
"sae_15805": "A white rook on the first rank, attacked by at least one black piece, and defended by at most two white pieces.",
"sae_15845": "White rook on the 3rd rank attacking a square on the 7th rank, with a white pawn on the 6th rank.",
"sae_15782": "A white pawn on the 2nd rank is attacked by a white piece, with the target square being a forward square on the 3rd rank.",
"sae_15854": "Detects a black piece on a square that is attacked by exactly one black piece and not attacked by any white pieces.",
"sae_15873": "This feature detects squares that are attacked by a black queen, especially if they are undefended by white.",
"sae_15858": "A pawn on the 7th rank that is not attacked by the opponent.",
"sae_15855": "A white rook attacking a white pawn on the 6th rank, with no black attackers on the pawn.",
"sae_14529": "A square is attacked by an enemy piece and is undefended by friendly pieces.",
"sae_15874": "A white piece (often a Bishop) on a square attacked by one white piece and one black piece.",
"sae_15893": "Detects a king on the first rank, with a friendly rook on the same rank and no enemy pieces attacking the target square.",
"sae_15766": "White's rook on a1 is undefended and not attacked, with the white king on e1 or f1.",
"sae_15761": "White's rook or queen attacks an empty square on the first or second rank, often near the king, with no black attackers.",
"sae_15892": "The feature detects a vacant square on the a or b file, on the 7th or 8th rank, that is attacked by at least two black pieces and zero white pieces, often with a black rook or queen on the same rank or file as the target square.",
"sae_15908": "A square attacked by at least two black pieces, with at most one white attacker, and the square is empty.",
"sae_15899": "The feature detects a king on the 7th or 8th rank, with a friendly pawn on the 6th or 7th rank, and a friendly king on the 5th or 6th rank, all on the same file, indicating a potential pawn promotion or king-side attack.",
"sae_15935": "A white pawn on the 2nd, 3rd, or 4th rank, attacked by a white piece, with the white king nearby.",
"sae_15894": "Detects squares on the back rank (rank 8 for white, rank 1 for black) or second rank (rank 2 for white, rank 7 for black) that are attacked by at least two enemy pieces and defended by zero friendly pieces.",
"sae_14693": "Detects an active white bishop in a tactical or endgame position, frequently involved in mating patterns or under positional tension, across various ranks.",
"sae_15952": "A square is attacked by a white piece and defended by a black piece, with the white king nearby.",
"sae_15925": "This feature detects a knight on an undefended square, especially when it is on the 5th, 6th, or 7th rank.",
"sae_15980": "White's queen attacks h6, which is defended by a black pawn, with no other pieces attacking or defending h6.",
"sae_16008": "The f8 square is attacked by multiple black pieces, with no white defenders, and is an empty square.",
"sae_15987": "Passed pawn endgame with at least one pawn on the 5th or 6th rank threatening promotion.",
"sae_16001": "Detects a pawn on the 2nd rank that is not attacked by either side.",
"sae_15954": "A white pawn on the 3rd or 4th rank, attacked by one black piece and defended by at least two white pieces.",
"sae_16012": "The feature detects empty squares on the first rank that are adjacent to the white king, particularly when the king is castled or near the corner.",
"sae_15995": "The feature detects a rook on the back rank (1st for White, 8th for Black) that is attacked by at least one enemy piece and defended by at least one friendly piece, with the side to move being the side whose rook is on the back rank.",
"sae_14770": "This feature detects a pawn on the 2nd or 3rd rank that is attacked by an enemy pawn or knight, often in an endgame or simplified position.",
"sae_16023": "The feature detects the f8 square being attacked by multiple black pieces, with no white defenders, and the black king on e8.",
"sae_16053": "This feature detects a queen on the first rank, attacked by at least one enemy piece, with no friendly defenders.",
"sae_16041": "This feature detects squares on the h-file (h6, h7, h8) that are attacked by White and are either undefended or defended by Black.",
"sae_16037": "This feature detects a black bishop on a dark square that is attacked by at least one white piece, with a preference for the bishop being on the 6th or 7th rank.",
"sae_14819": "A white piece attacks a square on the 6th or 7th rank near the black king, with no black defenders.",
"sae_14889": "Detects a black rook on its starting square (a8 or h8) that is not attacked by white pieces.",
"sae_16029": "A pawn on the 2nd rank (c2, b3, g2) that is attacked by a black piece and is either undefended or defended by a white rook.",
"sae_16059": "A white pawn on the 2nd, 3rd, or 4th rank, attacked by 0-1 black pieces and defended by 0-2 white pieces.",
"sae_16061": "White pawns on the 2nd or 3rd rank that are attacked by white pieces and not attacked by black pieces.",
"sae_16068": "A white pawn on the 3rd rank (a3, g3, h3) that is attacked by at least one white piece and at most one black piece.",
"sae_14895": "This feature detects a King on the 6th rank (for white) or 3rd rank (for black) that is not attacked by the opponent.",
"sae_16100": "The feature detects a white pawn on the 2nd rank (b2, c2, d2) or 4th rank (d4) that is attacked by at least one white piece and not attacked by any black pieces.",
"sae_16087": "Detects squares where black holds superior pawn control in zugzwang pawn endgames, often linked to king opposition breakdown.",
"sae_16095": "A square is attacked by two white pieces and one or two black pieces, with one white attacker being a rook.",
"sae_16103": "This feature detects a white pawn on the 7th rank, especially if it is undefended by black pieces and attacked by white pieces.",
"sae_16126": "A queen is attacking a square, and a rook on the same rank or file is also attacking that square, but the rook is blocked by another piece.",
"sae_16106": "The feature detects an empty square on the back rank that is not attacked by the opponent, especially when the king is on the back rank.",
"sae_16138": "The feature detects a pawn on the 2nd, 3rd, 4th, 5th, or 6th rank that is attacked by at least one enemy piece and defended by zero friendly pieces.",
"sae_16127": "This feature detects a square on the 7th rank (for white) or 2nd rank (for black) that is attacked by one of the side-to-move's rooks and defended by one of the opponent's rooks, with the opponent's king nearby.",
"sae_14954": "A pawn on the 7th rank that is not attacked by the opponent and is not defended by the side to move.",
"sae_15042": "A white rook on the first rank attacking an empty square on the first rank, with no black attackers on that square.",
"sae_16226": "A white bishop on b3 or g3 that is attacked by one black piece and defended by two white pieces.",
"sae_16166": "White pawn on the 2nd or 3rd rank, undefended by white pieces, and not attacked by black pieces.",
"sae_14996": "Detects a black pawn on the 3rd or 4th rank, on the a- or h-file, that is undefended by black and unattacked by white.",
"sae_16186": "White pawn on its starting square (e2 or g2) attacked by at least two white pieces and zero black pieces.",
"sae_16184": "Detects the king's castling square (g1 or c1 for white, g8 or c8 for black) when the king is on its starting square and the castling path is clear of pieces.",
"sae_16213": "The feature detects a central square (d3, d4, or e4) that is attacked by at least two white pieces and at most one black piece, with the target square being empty.",
"sae_15024": "A rook on its home rank (1st for White, 8th for Black) that is not under attack.",
"sae_16177": "King under direct attack with no defensive pieces nearby, across various endgame material configurations.",
"sae_15035": "A pawn on the 7th rank (for white) or 2nd rank (for black) that is attacked by at least one of the opponent's pieces.",
"sae_15034": "Detects a square attacked by at least one black piece, where white has fewer attackers than black, and the square is empty.",
"sae_16181": "This feature detects a black knight that is attacked by white and defended by black, with white having at least as many attackers as black has defenders.",
"sae_16112": "This feature detects a Queen on the target square that is attacked by exactly one enemy piece and defended by zero friendly pieces.",
"sae_16232": "The feature detects a vacant square on the 7th rank (or 2nd rank for Black) that is attacked by at least two enemy pieces and at most one friendly piece.",
"sae_16207": "The feature detects a white pawn on the 5th rank, with the target square being a square on the same rank, two files to the right of the pawn.",
"sae_16246": "A square is attacked by at least two black pieces and zero or one white pieces, with the target square being empty and white to move.",
"sae_16268": "The feature activates when the king is on the target square and is attacked by at least one enemy piece, with no friendly pieces defending the king.",
"sae_16260": "The white king is attacked by exactly one black piece, and is not defended by any white pieces.",
"sae_16256": "This feature detects squares attacked by a black knight on f6, especially when the white king is on b7 or c7.",
"sae_16235": "An undefended black pawn on the 5th, 6th, or 7th rank, with the black king nearby.",
"sae_15124": "White rook attacks a black rook on an open file or rank, with no other pieces between them.",
"sae_16269": "White's king is castled kingside, and the h1 square is attacked by two white pieces, often a rook and another piece, with no black attackers.",
"sae_16276": "The feature detects a square that is attacked by a white pawn and heavily contested by multiple black pieces, often on the 6th rank.",
"sae_16310": "A square that is attacked by at least one black piece and not attacked by any white piece.",
"sae_16194": "White's queen attacks a square that is either undefended or defended by a single black piece, and the square is on the 5th or 6th rank.",
"sae_15140": "Detects a pawn on the 4th rank that is either attacked by an enemy pawn or attacking an enemy pawn.",
"sae_16307": "White pawn on the 7th rank (or 2nd rank from Black's perspective) attacking a square on the 8th rank.",
"sae_16319": "A white pawn on the 2nd rank is attacked by one black piece and defended by at least one white piece.",
"sae_16292": "White's king is on the back rank, and a pawn on the 2nd rank is attacked by two black pieces and defended by one white piece.",
"sae_16360": "The feature detects a pawn on the 2nd or 3rd rank that is attacked by at least one enemy piece and defended by exactly one friendly piece, with the target square being the pawn's current position.",
"sae_16364": "The feature detects a square attacked by a white knight, especially when the square is empty and attacked by an opposing piece.",
"sae_16378": "The feature detects a pawn on the second rank that is not attacked by the opponent and is not defended by the side to move.",
"sae_15246": "White pawn on d5/e5/f5/g5 attacking an empty square on the 6th rank, which is also attacked by multiple black pieces.",
"sae_16305": "White attacks a black knight on f6 (or c6) with one piece, while black defends it with two or three pieces.",
"sae_16375": "The feature detects a black piece on a square that is attacked by at least one white piece and at least one black piece, with the white king not being in check.",
"sae_16368": "A pawn on the 4th rank is attacked by at least 2 white pieces and not attacked by any black pieces.",
"sae_16379": "White pawn on the 2nd rank (c2, g2) that is undefended by White and unattacked by Black.",
"sae_15201": "A white pawn on the 5th rank is attacked by at least one black piece and defended by exactly one white piece, with the target square being the square immediately in front of the pawn.",
"sae_15267": "Detects a black king on the back rank (g8 or h8) with no white attackers and a pawn on the f7/g7/h7 square, indicating a castled or semi-castled king.",
"sae_16350": "This feature detects a king on the back rank (7th or 8th) that is vulnerable to a back-rank mate, especially if the king is on h7/h8 or g7/g8 and there is a queen on the opposite side of the board.",
"sae_15288": "Detects a black queen on the first rank, attacked by at least one black piece, with no white attackers.",
"sae_15392": "A black queen is attacked by at least one black piece, and not attacked by any white pieces.",
"sae_15434": "Detects a white piece attacking a black piece on a square where the black piece is either undefended or defended by fewer pieces than white's attack.",
"sae_15449": "A square is attacked by at least two enemy pieces, with no or one friendly attacker, and no piece on the square.",
"sae_15464": "This feature detects a black rook on an open file, attacked by a white piece, with the black king nearby.",
"sae_15584": "Detects a pawn on the 4th rank (a4, b4, c4, e4, h3) that is either undefended or attacked by a single enemy piece.",
"sae_15632": "Detects a black pawn on the 4th, 5th, or 6th rank on the a or h file, which is undefended by white and either undefended or defended by black.",
"sae_15831": "Black knight on b8, attacked by at least two black pieces, with no white attackers.",
"sae_16392": "The feature detects a pawn on the a-file or h-file that is attacked by at least two enemy pieces and defended by at most one friendly piece.",
"sae_16398": "Detection of a black bishop on a central square (d5, d6, e4, e6, f5) that is attacked by at least one black piece and at most two white pieces.",
"sae_16413": "A queen is attacked by one white piece and one or two black pieces, with white to move.",
"sae_16406": "Kingside attacking position where the h7 pawn is the critical weakness in the castled king's shelter.",
"sae_16412": "The feature detects a king on the target square that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_16411": "A white knight is attacking a black knight that is undefended by black pieces.",
"sae_16399": "A white rook on its starting square (or a square it could have moved to from its starting square) is attacked by at least one black piece.",
"sae_16422": "The feature detects an empty square on the first rank (f1, g1, or h1) that is adjacent to the white king, with no white pieces attacking it, and often with a black piece or pawn nearby.",
"sae_16435": "This feature detects a queen on the back rank that is attacked by at least one enemy piece and is not defended by any friendly pieces.",
"sae_16424": "A white pawn on the 4th rank (c4, d4, or e4) that is attacked by no black pieces and is either undefended or defended by white pieces.",
"sae_16430": "This feature detects a pawn on the 2nd or 3rd rank that is not attacked by the opponent and is on the same file as the king.",
"sae_16446": "The feature detects squares on the first rank that are attacked by both sides, especially when the king is nearby.",
"sae_16450": "An undefended or lightly defended piece on an open square, vulnerable to a winning capture or tactical exploitation.",
"sae_16447": "A square is attacked by at least one white rook, with no black attackers, often on an open file or near the king.",
"sae_16476": "Black king on g8 (or h8) is attacked by at least one black piece, with no white attackers.",
"sae_16506": "White pawn on the 4th rank, attacked by a black pawn, and defended by a white piece (or undefended).",
"sae_16456": "A white pawn on the 2nd, 5th, or 7th rank, or a black pawn on the 2nd, 4th, or 7th rank, that is attacked by white and/or defended by white.",
"sae_16492": "Detects a black bishop on the back rank (c8 or f8) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_16540": "White's light-squared bishop on f1 is attacked by at least two white pieces and zero black pieces.",
"sae_16525": "This feature detects a white bishop on f1, attacked by two white pieces and zero black pieces, often with a white king on g1 or h1.",
"sae_16484": "The feature detects a king on the 7th or 8th rank, with a rook on the same rank, and the target square is a corner square on the same rank as the king and rook.",
"sae_16527": "A square is attacked by two white pieces and one black piece, with the target square being on the 6th, 7th, or 8th rank.",
"sae_16560": "This feature detects a black bishop on the 7th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_16582": "A white long-range piece \u2014 queen, rook, or bishop \u2014 exerts uncontested pressure on the 6th\u20138th rank, often enabling a back-rank or mating attack.",
"sae_16556": "White double rooks on the 6th and 7th rank dominating the opponent's position in a rook endgame.",
"sae_16443": "The feature detects a king on an open file/rank, with a friendly piece on the same file/rank, and a friendly piece on an adjacent file/rank, creating a potential discovered attack.",
"sae_16545": "A white knight on a central square (c3, d5, e5, f3) that is attacked by at least one black piece and defended by at least one white piece.",
"sae_16562": "The white king on e1 is attacked by a black piece, and white has multiple pieces defending e1.",
"sae_16569": "White's queen is on the 4th rank, attacking an empty square on the 1st rank, which is also attacked by at least two other white pieces and no black pieces.",
"sae_16581": "The feature detects an undefended king on the back rank, with the target square being the square directly in front of the king.",
"sae_16627": "This feature detects a black rook on the back rank (1st or 8th) that is attacked by a white piece and undefended by black.",
"sae_16563": "The King is on its starting square (or a nearby square on the back rank) and is attacked by an enemy piece, with no friendly pieces defending it.",
"sae_16568": "This feature detects a black bishop that is attacked by white, but not defended by white, and is on a square where it is the only piece of its color attacking that square.",
"sae_16622": "White has a rook attacking a square on the 7th rank, which is also attacked by a white pawn and defended by a black king.",
"sae_16598": "The feature detects a pawn on the 5th rank (for white) or 4th rank (for black) that is attacked by at least two enemy pieces and defended by fewer friendly pieces.",
"sae_16623": "A square on the 6th rank (for White) that is attacked by at least two Black pieces and at most two White pieces, with White having fewer attackers than Black.",
"sae_16643": "The feature detects a white rook on its starting square (a1 or f1) that is attacked by at least one black piece and defended by at least one white piece, with white to move.",
"sae_16626": "Detects an undefended square on the 6th rank, attacked by at least one black piece, with a white knight on b4 or g4.",
"sae_16648": "This feature detects a king on a square attacked by at least one enemy piece, with the king having 0 or 1 friendly attackers.",
"sae_16677": "White King on e1, attacked by 2-3 white pieces, with no black attackers.",
"sae_16678": "Detects a square on the 4th rank that is attacked by at least one black piece and is either undefended by white or defended by fewer white pieces than black pieces.",
"sae_16676": "A black queen is on the first or second rank, attacked by exactly one black piece and zero white pieces.",
"sae_16660": "The feature detects a square on the 6th rank that is attacked by at least one white piece and at least one black piece, with white having fewer attackers than black.",
"sae_16659": "A square is attacked by a black piece, and the white king is nearby, but the square is not attacked by a white piece.",
"sae_16636": "A black knight or queen occupies or threatens a low-rank square (f2, c1) creating a decisive tactical threat against the white king.",
"sae_16653": "The feature detects a vacant square on the 6th rank (c6 or f6) that is attacked by the opponent and defended by the side to move, with the opponent having more attackers than the side to move has defenders.",
"sae_16687": "Detects a white pawn on the 4th or 5th rank, attacked by no black pieces, and attacked by at least one white piece.",
"sae_16603": "This feature detects a pawn on the 6th or 7th rank that is not attacked by the side to move, often with a king nearby.",
"sae_16698": "Detects a king on the back rank, or a back rank square attacked by a black piece.",
"sae_16717": "Detects a white pawn in a king-and-pawn endgame on a semi-open or contested file, in positions with zugzwang or critical king-opposition themes.",
"sae_16703": "Detects a square attacked by at least two black pieces, with no white attackers, and the square is on the 5th rank or higher.",
"sae_16752": "The feature detects a target square that is attacked by the opponent and not attacked by the side to move, often on the 6th, 7th, or 8th rank, and frequently near the opponent's king.",
"sae_16741": "The feature detects a white king on the first rank, attacked by one white piece and one or two black pieces, with the target square being a square adjacent to the king.",
"sae_16746": "This feature detects a pawn on the 2nd or 4th rank that is either undefended or equally attacked/defended, often by a pawn or knight.",
"sae_16797": "A square is attacked by two black pieces and one white piece, with the white king nearby.",
"sae_16713": "The feature detects a pawn on f7 or e7 that is undefended by white pieces and attacked by at least one black piece, often with a white rook on the 7th rank.",
"sae_16768": "The feature detects a black bishop on g7, attacked by zero white pieces and defended by one black piece, with white to move.",
"sae_16779": "White rook attacking a square on the 6th, 7th, or 8th rank, with no black attackers.",
"sae_16761": "The feature detects a white piece on the first two ranks that is attacked by at least one white piece and at most one black piece.",
"sae_16769": "Detects a queen on the first rank, attacked by at least one enemy piece, with no friendly attackers.",
"sae_16738": "The feature detects an undefended f1 square, attacked by multiple white pieces, often including a knight on e3 or d2, and a bishop on c4 or b5, with the white king on e1.",
"sae_16680": "The feature detects the h8 square being attacked by a black piece, with no white attackers, and the white king is on the kingside (g1 or h1).",
"sae_16785": "An isolated or passed pawn on the 4th rank in a pawn endgame, often the pivot piece in a zugzwang or king-vs-pawn race.",
"sae_16786": "This feature detects a piece (especially a knight or bishop) on a central or king-side square that is attacked once by both sides, with the attacking white piece being a rook or knight.",
"sae_16793": "A pawn on the 6th rank that is attacked by an enemy pawn and defended by a friendly pawn, with the king nearby.",
"sae_16808": "Detects an empty square on the first rank or a-file that is attacked by a black rook and not defended by a white piece.",
"sae_16819": "Detects a rook on the first or second rank, on the same file as the king, with no immediate attackers or defenders.",
"sae_16863": "A white pawn on the 5th, 6th, or 7th rank, on the a or b file, that is not attacked by black pieces.",
"sae_16701": "White knight on the 3rd rank (or b4) is attacked by one black piece and defended by at least one white piece.",
"sae_16694": "A white pawn or king attacks a piece on the 6th or 7th rank, with no black attackers on the target square.",
"sae_16904": "The feature detects a pawn on f7 (or f5) that is attacked by a black piece and not defended by a white piece, often with a white king nearby.",
"sae_16842": "Heavy pieces (queen or rook) exerting pressure on the opponent's back rank or second rank.",
"sae_16897": "White queen attacking a black king that is one square away diagonally, with no other pieces between them.",
"sae_16915": "The feature activates when a king is on the first rank, and the target square is an adjacent square on the first rank that is attacked by at least one enemy piece.",
"sae_16919": "The feature detects a white piece attacking a square on the 7th rank, which is also attacked by a black piece, and the square is empty.",
"sae_16914": "The feature detects a square on the 6th rank (for White) that is attacked by at least as many Black pieces as White pieces, with a preference for squares on the c-file.",
"sae_16912": "This feature detects a black knight on f6 or c5/c6 that is attacked by one white piece and defended by one or two black pieces.",
"sae_16986": "A square on the first rank is heavily attacked by white pieces, with no black attackers.",
"sae_16920": "This feature detects a pawn on the 7th rank (for white) or 2nd rank (for black) that is not attacked by the side to move and is attacked by the opponent, or not attacked by either side.",
"sae_16835": "The feature detects a pawn on the 6th or 7th rank that is not attacked by either side, with the king of the side to move nearby.",
"sae_17005": "A square attacked by exactly one white piece and at most one black piece, where the square is empty.",
"sae_17050": "The feature detects a white rook attacking a square on the 2nd or 3rd rank, which is also attacked by a black piece, with no piece on the target square.",
"sae_16861": "Detects a queen on a square that is attacked by at least one enemy piece, and not attacked by any friendly pieces.",
"sae_17023": "The feature detects a knight on f3 or c3 (for white) that is attacked by one black piece and defended by at least two white pieces.",
"sae_17162": "The feature detects a white knight on f3 or c3 that is attacked by one black piece and defended by two white pieces.",
"sae_16901": "Black rook on the back rank (a8, c8, d8) attacked by at least one black piece and zero white pieces.",
"sae_17167": "White's knight is attacked by one black piece and defended by at least one white piece, with white having more attackers than black.",
"sae_17053": "A black queen is on the first rank (or 5th rank for black) and is attacked by at least one black piece, but not by any white pieces.",
"sae_17061": "A pawn on the 6th rank (b6 or c5) is attacked by at least one black piece and not defended by any white pieces.",
"sae_17019": "This feature detects a square that is attacked by the opponent's queen and at least two other pieces, and defended by only one of the player's pieces.",
"sae_17223": "This feature detects a white rook on the first rank, attacked by at least one black piece, and defended by at least one white piece.",
"sae_17011": "This feature detects a white pawn on the 3rd or 5th rank that is attacked by at least one black piece and defended by exactly one white piece (a bishop or knight).",
"sae_17192": "The feature detects a king on the back rank (1st or 8th) that is attacked by one of its own pieces, often a rook, and is not attacked by any enemy pieces.",
"sae_17090": "The feature detects a white bishop on b2, with a white pawn on a2, and a black pawn on a3, where the target square a1 is empty.",
"sae_17022": "The feature detects an empty square on the back rank (a8 or b8) that is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_16957": "Detects a pawn on the 4th rank (for white) or 5th rank (for black) that is attacked by one enemy piece and defended by two friendly pieces, or an empty square on the 3rd rank (for white) or 6th rank (for black) that is attacked by one enemy piece and defended by one or two friendly pieces.",
"sae_17190": "Detects a pawn on a3 or a8, or an empty square on a3 or a8, with no attackers from either side.",
"sae_17140": "A white pawn is attacked by at least one black piece and defended by exactly one white piece, with the target square being a pawn.",
"sae_17232": "This feature detects a Bishop on a square that is attacked by at least one black piece.",
"sae_17227": "The feature detects a pawn push to the 4th rank, creating a pawn chain or expanding the pawn structure, often with a king nearby.",
"sae_17077": "The feature activates when the king on the target square is attacked by a rook, and there are no other pieces between the king and the attacking rook.",
"sae_17215": "Detects an empty square attacked by one white piece and one black piece, often a pawn or knight, on the 3rd or 4th rank for white.",
"sae_17193": "Detects an undefended empty square on the 7th or 8th rank that is attacked by at least one black piece.",
"sae_17270": "This feature detects a white piece attacking a black piece on the back rank, where the black piece is a queen or rook.",
"sae_17202": "Detects a white piece (or empty square) on the 3rd or 4th rank that is attacked by one black piece and defended by at least two white pieces.",
"sae_17296": "Detects a black knight on b8, attacked by black pieces, with no white attackers.",
"sae_17276": "A white bishop attacking a black bishop, where both bishops are on the same diagonal and the black bishop is defended by at least one other piece.",
"sae_17304": "Detects a pawn on the 2nd rank that is not attacked by either side, with the king of the side-to-move nearby.",
"sae_17278": "A square is attacked by one white piece and one black piece, with the white piece being a knight or bishop, and the black piece being a pawn or rook.",
"sae_17279": "Detects a square attacked by 3 black pieces and 1 or 2 white pieces, often on the 6th rank, where the target square is empty.",
"sae_16989": "Detects a king on the back rank (g8 or h8) that is attacked by at least one enemy piece, with no friendly pieces defending it.",
"sae_17294": "The feature detects a king on the first rank, with the target square being an adjacent empty square on the same rank, and no white pieces attacking the target square.",
"sae_17310": "The feature detects a target square that is attacked by at least one black piece and not attacked by any white pieces, often in the opponent's half of the board.",
"sae_17300": "The feature detects a white knight or rook on a central square (e.g., c3, e5, f3, f7, g5, g7) that is attacked by fewer black pieces than white pieces.",
"sae_17352": "The feature detects squares attacked by at least two white pieces and at most two black pieces, often in the center or near the king.",
"sae_17345": "A white piece attacks a black knight on a central square, with an equal number of white and black attackers on that square.",
"sae_17343": "The king is on the back rank or second to last rank, and there are no pieces directly in front of it on the same file.",
"sae_17375": "Black king on its home square (e8 or b8) is attacked by multiple black pieces, with no white attackers.",
"sae_17387": "This feature detects squares that are attacked by a white rook, but not by any black pieces, and are on the same rank or file as the white king.",
"sae_17369": "Detects empty squares on the first rank that are attacked by a white rook, with the white king on the first rank.",
"sae_17371": "Detects a tactical situation involving a pinned or contested piece near the centre, often tied to a promotion or advanced-pawn motif.",
"sae_17274": "The feature detects a king on the back rank, with a rook or queen on the same rank, and the target square is the opposite corner of that back rank.",
"sae_17382": "Detects a square attacked by at least one black piece, where white has at least one attacking piece, and the target square is on the 4th, 5th, or 6th rank.",
"sae_17400": "Detects a pawn on a light square (b3 or g4) attacked by a white bishop on a dark square, with no black attackers.",
"sae_17393": "A black rook on the 2nd or 3rd rank, undefended by black pieces, and not attacked by white pieces.",
"sae_17405": "Black rook actively placed in the opponent's half or mid-board, creating a discovered attack or check threat.",
"sae_17374": "Detects an empty square on the back rank (rank 8 for white, rank 1 for black) that is not attacked by either side, often with a king nearby.",
"sae_17415": "The feature detects an empty square on the back rank (a8 or h8) that is attacked by exactly one white queen and no black pieces.",
"sae_17445": "Detects a pawn on a3 or h3 that is attacked by one white piece and one black piece, with white to move.",
"sae_17388": "Detects a square that is attacked by a black queen and is a potential target for a white queen or pawn, often near the black king.",
"sae_17475": "Detects an empty square on the back rank that is a potential escape square for the black king, which is currently in check or under attack.",
"sae_17429": "Black Queen on the back rank (7th/8th for white, 1st/2nd for black) with no white attackers.",
"sae_17505": "Detects a black rook on a8, with the black king castled kingside, and a white pawn on the c-file.",
"sae_17456": "Black's back rank (8th rank) is attacked by at least 3 black pieces, and is empty of white pieces.",
"sae_17494": "The feature detects an undefended h8 square, attacked by at least one black piece, with the white king on the back rank (rank 1).",
"sae_17481": "Detects an undefended square that is attacked by a black pawn, or is a square a black pawn could move to.",
"sae_17476": "Detects an empty corner square (a8 or h1) that is attacked by a white Bishop and a white Knight, with the white King nearby.",
"sae_17515": "The feature detects the h1 square being attacked by at least one white piece, with no black attackers, and the white king is on the kingside (g1 or h1).",
"sae_17557": "White Queen on d1, attacked by at least two white pieces, with no black attackers.",
"sae_17548": "Advanced pawn endgame with promotion threats, typically featuring passed pawns and king-versus-king opposition.",
"sae_17532": "White attacks an undefended black rook on the 1st, 2nd, 3rd, or 4th rank.",
"sae_17550": "The feature detects a square that is attacked by White, but more heavily attacked by Black, and is often on the 6th rank.",
"sae_17538": "The feature detects a square on the 7th rank (for white) or 2nd rank (for black) that is attacked by one friendly piece and defended by one enemy piece, with the king on the same rank or an adjacent rank.",
"sae_17579": "Detects a king on the back rank (or near it) with a bishop on the long diagonal, often with a pawn on the 7th rank.",
"sae_17582": "The feature detects a square attacked by exactly one white piece (often a Bishop or Knight) and either zero or one black piece, where the target square is often on the edge of the board or near the opponent's king.",
"sae_17618": "The feature detects a black pawn on the 6th rank (for black) that is attacked by at least one white piece and defended by at most one black piece.",
"sae_17609": "Detects an empty square on the first rank that is not attacked by the side to move, often with a king nearby, suggesting a potential castling square or king safety concern.",
"sae_17599": "The feature detects a king-side pawn on the 7th rank (or 2nd rank for black) that is attacked by an enemy piece and defended by a friendly piece, often a rook.",
"sae_17614": "The feature detects a knight on a central square (d4, e4, f4, f5) that is attacked by at least two enemy pieces and defended by at most two friendly pieces.",
"sae_17625": "This feature detects squares attacked by a white queen on f5, especially those near the black king on c5.",
"sae_17627": "Black king on e8, attacked by multiple black pieces, with no white attackers.",
"sae_17643": "The feature detects a black pawn on the 6th rank (a6, g6, h6) that is undefended by white pieces and either undefended or defended by one black piece.",
"sae_17650": "The feature detects an empty square on the first rank, which is the king's original square, and the king is on the same rank.",
"sae_17670": "A white pawn on the 6th or 7th rank that is attacked by a black piece and defended by at least one white piece.",
"sae_17669": "Detects a target square that is attacked by a black queen and undefended by white, often near the white king.",
"sae_17664": "This feature detects a black pawn on the 6th or 7th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_17652": "Detects a king on the 3rd rank, attacked by no white pieces, and with a white queen on the 6th rank.",
"sae_17411": "White rook on the second rank, attacking an empty square on the back rank, with no pieces between the rook and the target square.",
"sae_17692": "A pawn on the 6th or 7th rank is attacked by a single enemy piece (knight or pawn) and undefended by friendly pieces.",
"sae_17729": "Detects a black pawn on the 2nd, 3rd, or 4th rank, with no white attackers and 0 or 1 black attackers.",
"sae_17720": "This feature detects a white bishop on its starting square (f1 or c1) that is attacked by at least two white pieces and not attacked by any black pieces.",
"sae_17782": "A rook on the 7th rank (or 2nd rank) that is attacked by an enemy piece and also under pressure from a friendly piece, creating an overloaded defender.",
"sae_17770": "This feature detects a pawn on the 5th, 6th, or 7th rank that is attacked by at least one enemy piece and defended by at most one friendly piece.",
"sae_17823": "Black bishop on the back rank, attacked by black pieces, with no white attackers.",
"sae_17721": "Detects an empty square on the first rank that is attacked by a black piece, with the white king nearby.",
"sae_17808": "The feature detects squares on the 6th rank that are attacked by at least one white piece and at least one black piece, with black having more attackers than white.",
"sae_17935": "This feature detects a pawn or minor piece on the 4th, 5th, or 6th rank that is attacked by exactly one enemy piece and defended by zero friendly pieces.",
"sae_17855": "A white pawn on the 4th rank, attacked by white pieces and not attacked by black pieces.",
"sae_17775": "Detects a white pawn on the 3rd or 4th rank, on the edge of the board (a or h file) or one square in (b or g file), that is not attacked by black pieces.",
"sae_17839": "Detects a knight on c3 or g2 attacked by an enemy piece and defended by one or two friendly pieces.",
"sae_17845": "White pawns on the 2nd or 3rd rank that are attacked by a black pawn on an adjacent file.",
"sae_17743": "This feature detects a white rook on the 5th, 6th, or 7th rank, with no immediate attackers, and a black king nearby.",
"sae_17827": "A queen is attacked by at least one enemy piece, and is not defended by any friendly pieces.",
"sae_17929": "White pawns on the 7th rank attacking an empty square on the 8th rank, with the white king nearby.",
"sae_17944": "White pawn on h2 (or a2) attacked by 0-1 black pieces and defended by 1-2 white pieces.",
"sae_17903": "A king is attacked by one enemy piece and defended by one friendly piece, with the target square being the king's current position.",
"sae_17852": "The feature detects squares on the 6th rank (for white) that are attacked by at least 2 black pieces and at most 2 white pieces.",
"sae_17949": "A pawn on the 2nd rank is attacked by an enemy piece, often a knight or queen, and is sometimes defended by a friendly piece.",
"sae_17965": "The feature detects a white piece attacking a black piece on the 7th rank, where the black piece is defended by at least two black pieces.",
"sae_17920": "The feature detects an undefended pawn on f7 or h7, with the king on the back rank, and the side to move is white.",
"sae_17658": "Detects a square attacked by at least one white piece and at least one black piece, with a preference for squares on the 6th rank.",
"sae_17898": "Detects a knight on a square attacked by at least two friendly pieces and at most one enemy piece.",
"sae_17958": "The feature detects a white piece attacking a black piece on the opponent's back rank, especially when the black piece is a pawn or rook.",
"sae_17964": "The feature detects the white king's castling square g1 being attacked by exactly two white pieces (usually a knight and a bishop) and no black pieces, with the king on e1 and a rook on h1.",
"sae_18014": "White's rook on a1 is undefended or defended by only one white piece, and there are no black attackers on a1.",
"sae_18020": "Detects undefended squares on the 7th or 8th rank that are heavily attacked by the opponent.",
"sae_17683": "Black pieces attacking e7, which is either empty or occupied by a black piece, with no white attackers.",
"sae_18005": "A square is attacked by two white pieces and one black piece, with the target square being empty.",
"sae_17979": "The feature detects a pawn on the 5th or 6th rank that is attacked by at least two enemy pieces and at most one friendly piece.",
"sae_18054": "White pawn on the 6th rank directly in front of the black king, with a white king nearby.",
"sae_17959": "Detects a knight on the 6th or 7th rank, attacking a square on the 1st rank, with the king on the 4th or 5th rank.",
"sae_18035": "The feature detects a vacant square on the back rank (c8, e8, or b8) that is attacked by multiple black pieces and not attacked by any white pieces.",
"sae_18022": "A white rook or queen attacks a square on the back rank that is also attacked by a black pawn, with the black king nearby.",
"sae_18130": "A white queen on the 8th rank, especially on the kingside, with no black attackers.",
"sae_18052": "The feature detects an empty square on the 4th or 5th rank that is attacked by at least two white pieces and at most two black pieces.",
"sae_18047": "White rooks on starting squares with castling rights intact and an uncastled king.",
"sae_18077": "The feature detects a square attacked by at least two enemy pieces and defended by exactly one friendly piece, with the friendly piece being a king in some cases.",
"sae_18060": "Detects a black rook on a8 (or h8) that is undefended by white pieces and attacked by at least one black piece.",
"sae_18128": "The feature detects a square that is attacked by the opponent and defended by the side to move, with the opponent having more attackers than the side to move has defenders.",
"sae_18181": "A white piece (knight or bishop) is attacked by a white piece, and the target square is occupied by a black knight or bishop.",
"sae_18074": "This feature detects a white bishop on a central square (c3, d3, e5, f4) that is attacked by one black piece and defended by one white piece.",
"sae_18023": "Detects a pawn on g3/g6, with the target square being h4/h5 (for white) or h5/h4 (for black), indicating a potential pawn push or a pawn structure where the h-pawn is advanced.",
"sae_17982": "A square is attacked by at least one white piece and at least one black piece, with black having more attackers than white.",
"sae_18135": "This feature detects a white queen on a square that is attacked by both white and black pieces, with white having at least as many attackers as black.",
"sae_18110": "The feature detects a king-side pawn push (g7-g6 or h7-h6) that opens up the king's protection, especially when the king is castled short.",
"sae_18153": "White pawn on the 2nd or 3rd rank, or an empty square on the 1st rank, that is attacked by a white bishop on a light square, with the white king nearby.",
"sae_18122": "Detects a king-side square (h8, e8, d8) that is attacked by at least one white piece and at least one black piece, with the target square being empty.",
"sae_18112": "A queen in a dominant advanced position, typically near or on the opponent's back rank, with no immediate threat to its safety.",
"sae_18080": "The feature detects a white rook on its starting square (1st rank) that is attacked by at least one black piece and defended by at least two white pieces.",
"sae_18158": "White piece activity on a contested square in an endgame or simplified middlegame where a tactical capture or outpost is available.",
"sae_18232": "A pawn on the 2nd or 3rd rank (from its side) that is attacked by an enemy piece and undefended by a friendly piece.",
"sae_18226": "Detects a king-side square (g1, g2, h1, h2) that is attacked by one white piece and one black piece, often with a queen involved in the attack.",
"sae_18166": "Detects an unattacked enemy rook or queen on the 6th, 7th, or 8th rank, with the side to move having a rook on the same file.",
"sae_18264": "The feature detects a white piece attacking a black piece on a square where the black piece is also attacked by another black piece, with the white piece being the only white attacker.",
"sae_18250": "A square is attacked by white and either undefended or attacked by fewer black pieces, with the white king nearby.",
"sae_18307": "White pieces (especially knights and bishops) attacking the f1 square, which is empty and often near the white king.",
"sae_18270": "A pawn on the 6th rank is attacked by at least 2 enemy pieces and defended by at most 2 friendly pieces.",
"sae_18323": "The feature detects an empty square on the first rank that is not attacked by any piece, often near the king, suggesting a potential castling square or a safe retreat.",
"sae_18295": "White's king-side rook is on h1, and the g-file is open or semi-open, with no white pawns on g2 or g3.",
"sae_18305": "Detects squares under sole black pawn control in endgames, typically corresponding to black's space advantage or a passed pawn advance.",
"sae_18330": "A queen attacking an empty square on the 4th or 5th rank, with no black attackers on that square.",
"sae_18245": "White's Rook on the first rank is attacked by at least one friendly piece and not attacked by any enemy pieces.",
"sae_18370": "Detects a white rook or knight attacking a square on the 7th or 8th rank, with no black pieces attacking that square.",
"sae_18246": "This feature detects a queen on a square that is attacked by one black piece and attacked by one or two white pieces.",
"sae_18318": "White knight on b1 or g1, defended by at least one white piece, with no black attackers.",
"sae_18356": "A white knight on the 3rd or 5th rank that is attacked by at least one black piece.",
"sae_18358": "Detects a king (of either color) on the same rank or file as an opposing rook, with no pieces between them.",
"sae_18364": "Detects a pawn on the 7th rank (for white) or 2nd rank (for black) that is not attacked by the opponent, especially when it is a passed pawn.",
"sae_18383": "Detects a queen on the first or fourth rank, with no white attackers and few black attackers, often in a position where it is trapped or has limited mobility.",
"sae_18395": "Detects a king on a square that is not attacked, but is adjacent to a white queen.",
"sae_18325": "A white piece (Knight or Bishop) on a central square (c4, d5, e3, f4, f5, g5) that is attacked by exactly one black piece and defended by at most two white pieces.",
"sae_18520": "A white King on b1 is attacked by a black Rook on c1, which is defended by a white Bishop on c1.",
"sae_18481": "The feature detects a black pawn on g6 that is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_18375": "Detects a weak square on the kingside (g3/h3/h4/f2/e2) that is either undefended or attacked by more black pieces than white pieces.",
"sae_18421": "This feature detects an undefended Queen on the opponent's side of the board, especially on the 7th or 8th rank, that is not attacked by the opponent.",
"sae_18432": "A white bishop that is defended by at least one white piece, commonly on the first four ranks or kingside files.",
"sae_18445": "Detects a black king on h8 (or g8 in one case) that is attacked by at least one black piece, but not by any white pieces.",
"sae_18417": "A white rook on an open file or rank, participating in a discovered attack or mating sequence, often as the primary attacker.",
"sae_18475": "A white pawn on the 2nd rank is attacked by at least one white piece and not attacked by any black pieces.",
"sae_18409": "Active knight participating in a mating attack, often with king exposed and supporting pieces coordinating on open files.",
"sae_18480": "This feature detects a central square (d4/e4/c4) that is attacked by both sides, often with an equal number of attackers.",
"sae_18471": "A black pawn on the 5th or 6th rank is attacked by at least one black piece, and not attacked by any white pieces.",
"sae_18531": "This feature detects a queen on a square that is attacked by exactly one friendly piece and not attacked by any enemy pieces.",
"sae_18506": "This feature detects a black knight on f6 or c6 that is attacked by one white piece and defended by two or three black pieces.",
"sae_18454": "This feature detects squares on the 3rd rank (for white) or 6th rank (for black) that are attacked by at least 3 friendly pieces and at most 2 enemy pieces, often with a friendly pawn on an adjacent square.",
"sae_18488": "A square is attacked by at least two enemy pawns, with no friendly pieces defending it.",
"sae_18403": "The feature detects a vacant square on the 5th or 6th rank that is attacked by at least two enemy pieces, and by at most one friendly piece.",
"sae_18491": "A white pawn on the 2nd rank is attacking a black pawn on the 3rd rank, with no black defenders.",
"sae_18478": "Detects a pawn on the 2nd rank that is not attacked by White, and is either not attacked by Black or attacked by a single Black piece.",
"sae_18451": "Detects a king on the back rank or 7th rank in rook endgames, often with the rook controlling the same or adjacent rank.",
"sae_18640": "White knight on d4 attacked by a single white piece, with no black attackers.",
"sae_18558": "White pawn on a3/a5/b4 attacked by white, with no black attackers.",
"sae_18545": "A white rook on the 7th or 8th rank is attacking a black rook on the same rank, with the black king nearby.",
"sae_18538": "A queen is attacked by one white piece and one black piece, with the white attacker being a knight or bishop, and the black attacker being a pawn.",
"sae_18466": "The black king is on the back rank (7th or 8th) and is attacked by at least two black pieces, or is on the 7th rank and attacked by no white pieces.",
"sae_18609": "A white knight on a central square (d2, e2, c3, f3) that is attacked by multiple white pieces and not attacked by any black pieces.",
"sae_18542": "Detects a king on a corner square (a1 or h1) with no immediate threats, often with a pawn structure that could lead to a king-side or queen-side pawn storm.",
"sae_18587": "Detects a king on the 7th or 8th rank, with a queen on the 4th or 5th rank, and no pieces between them.",
"sae_18316": "A white pawn on the 7th rank (or 2nd rank for black) with no immediate black defenders, targeting a square on the 8th rank (or 1st rank for black).",
"sae_18645": "Detects a black knight on the 5th or 6th rank that is attacked by white and defended by black.",
"sae_18683": "Detects a king on the 7th or 8th rank, with the target square being a corner square on the 8th rank, often with a pawn on the 7th rank.",
"sae_18747": "Detects a rook on the same rank or file as the enemy king, with the target square being the square on that rank/file that is furthest from the rook and on the opposite side of the king.",
"sae_18684": "The feature detects a pawn on the 2nd or 3rd rank that is undefended by the side to move, and is either attacked by an enemy piece or is on the same file as the enemy king.",
"sae_18665": "This feature detects a pawn on the 3rd or 4th rank that is attacked by at least one enemy piece, and is either undefended or defended by only one friendly piece.",
"sae_18537": "This feature detects squares that are attacked by both sides, with a slight preference for squares on the 5th and 6th ranks.",
"sae_18708": "The feature detects a white piece attacking a black piece on the 5th or 6th rank, where the black piece is attacked by at least one other black piece.",
"sae_18649": "White bishop on b5 attacking a pawn on a6, with a white king on d4 and a black king on g6, and a white pawn on d5.",
"sae_18669": "The feature detects a pawn on the 4th or 5th rank that is attacked by at least one enemy piece and defended by at least one friendly piece, with the side to move being the one whose pawn it is.",
"sae_18714": "This feature detects a white king's proximity to the target square, especially when the king is on the 4th, 5th, or 6th rank.",
"sae_18697": "King forced to abandon the back rank to escape an imminent mating threat.",
"sae_18878": "Black's king-side rook on h8 is attacked by a black piece, with the target square g8 being empty and attacked by at least one black piece.",
"sae_18852": "White bishop on g2, attacked by a white piece, and not attacked by any black pieces.",
"sae_18782": "Detects an undefended empty square on the 5th, 6th, or 7th rank that is attacked by at least two enemy pieces.",
"sae_18777": "The feature detects the f8 square being attacked by at least two black pieces, with no white attackers, often with a black queen and/or bishop involved.",
"sae_18842": "A black pawn controls an undefended square in a king-and-pawn endgame.",
"sae_18772": "White King on the first rank, with a white piece attacking an adjacent square on the first rank, and no black attackers on that square.",
"sae_18785": "The feature detects an empty square on the second rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_18876": "The feature detects a black pawn on a7, with no attackers or defenders, and a white pawn on a2 or a3, and a white bishop on the a1-h8 diagonal.",
"sae_18869": "A white knight on f3 (or c3) that is attacked once by black and defended twice by white.",
"sae_18839": "The feature detects a square that is attacked by at least 3 black pieces and at most 2 white pieces, with the target square being empty.",
"sae_18792": "A white rook or queen on the first two ranks is attacked by one black piece and defended by at least one white piece.",
"sae_18845": "This feature detects a king on the back rank, with a friendly rook on the same rank, and a pawn on the 7th rank that can advance to block the king's escape.",
"sae_18786": "A pawn on the 7th rank (for white) or 2nd rank (for black) that can promote to a queen on the target square, with no immediate captures preventing promotion.",
"sae_18806": "Detects a king on an edge square, with a friendly queen or rook on an adjacent rank/file, and no immediate attackers on the king.",
"sae_18888": "Detects a queen on the home-side back ranks (1st\u20132nd for white, 7th\u20138th for black) that is well-defended and not under attack, across both colour orientations.",
"sae_18805": "A white rook on the 7th rank attacking a black rook on the 2nd or 3rd rank, with no black defenders.",
"sae_18891": "This feature detects a piece (often a Bishop or Knight) that is attacked and defended by an equal number of pieces, indicating a potential capture or exchange.",
"sae_18911": "This feature detects a black pawn on d5 or e5 that is attacked by at least two black pieces and is either undefended or attacked by at most one white piece.",
"sae_18825": "Detects undefended or singly-defended pawns on the 7th rank (for black) or 2nd rank (for white), especially on the h-file, that are attacked by the opponent.",
"sae_18893": "A square attacked by one white piece and one black piece, where the white attacker is a Queen or Rook.",
"sae_18934": "The feature detects an undefended empty square on the 6th or 7th rank that is attacked by a single black piece, with the white king nearby.",
"sae_18921": "This feature detects a target square on the 4th or 5th rank that is attacked by exactly one black piece and not attacked by any white pieces.",
"sae_18945": "Detects an empty square on the first rank that is attacked by a knight.",
"sae_18942": "A pawn is attacked by a knight, and the king of the attacking side is nearby.",
"sae_18879": "A pawn push to the 4th rank (g4/h6/a5) that attacks an empty square, often supported by another pawn, and is not attacked by the opponent.",
"sae_18946": "A contested square on the 5th rank where white has or is about to place a piece, with black applying pressure.",
"sae_18967": "Detects a black knight or pawn on a central square (d5 or b3) that is heavily attacked by white pieces (at least 2 attackers, up to 4) and lightly defended by black pieces (0 or 1 defender).",
"sae_18925": "The feature detects a king on the back rank, with an empty square next to it that is attacked by a friendly rook.",
"sae_18975": "Detects a king on the back rank (rank 1 or 8) with no friendly pieces on the squares immediately in front of it, indicating a potential back-rank mate threat.",
"sae_19074": "Detects squares where white has fewer attackers than black, but white has at least one attacker.",
"sae_18970": "Detects a knight fork threat on the king and another piece (rook, queen, or pawn) where the knight is not attacked.",
"sae_19127": "A white queen attacks an empty square on the 6th or 7th rank, with the white king nearby.",
"sae_19115": "Black knight on b8, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_19045": "The feature detects a pawn on the 7th rank (for white) or 2nd rank (for black) that can promote to a queen on the next move, with the king nearby.",
"sae_19006": "Detects a square on the back rank (rank 1 for white, rank 8 for black) that is attacked by at least one enemy piece and defended by exactly one friendly piece, with the friendly king on the back rank.",
"sae_19096": "Detects a bishop on a dark square that is attacked by one white piece and defended by one or two black pieces.",
"sae_19100": "A black queen is attacked by exactly one white piece, and that white piece is a pawn.",
"sae_19031": "Detects a black rook on the back rank (a8 or h8) that is undefended and unattacked, often with the black king nearby.",
"sae_19084": "The king is on the back rank and is attacked by an enemy queen, with no friendly pieces defending the king.",
"sae_19075": "A queen on the 7th or 8th rank attacking a square on the 6th or 7th rank, which is also attacked by a king on the 8th rank.",
"sae_19119": "Detects a square attacked by a white king, with the square being either undefended or defended by a single black piece.",
"sae_19032": "Detects squares on the back rank (d8/f8) or near the back rank (f6) that are heavily attacked by black pieces and undefended by white pieces.",
"sae_19224": "The feature detects a knight on a square adjacent to a king, where the knight is not attacked and the king is not attacked by the knight.",
"sae_18996": "White's king is castled kingside, and the f1 square is attacked by at least two white pieces, often including a knight on e3 or d2, and a bishop on c4 or b5, with the f-pawn on f2.",
"sae_19254": "This feature detects a pawn on the 5th or 6th rank that is attacked by both sides, often with white having an equal or greater number of attackers.",
"sae_19081": "The feature detects a king on the back rank (7th or 8th) that is attacked by a single enemy piece, with no friendly pieces defending the king.",
"sae_19151": "A black bishop on the 2nd rank, attacked by no white pieces, and not on its starting square.",
"sae_19276": "A queen is on the target square, and it is attacked by at least one enemy piece, but not by any friendly pieces.",
"sae_19157": "Detects a knight on a central square (d5, e5, d6, e6, e2) that is attacked by at least two enemy pieces and defended by at least one friendly piece.",
"sae_19281": "Detects squares attacked by at least 3 black pieces, often on the 6th rank, with white having 1-2 attackers.",
"sae_19300": "A white bishop on the c-file is attacked by a black piece and defended by a white piece.",
"sae_19147": "Detects a pawn on the 7th rank (or 2nd rank for black) that is attacked by an enemy piece and defended by a friendly piece, with the target square being the promotion square.",
"sae_19135": "The feature detects a white attack on a king-side square (h7 or h8) that is also defended by a black piece, often a pawn or knight, with the white attack being a single piece.",
"sae_19237": "The feature detects a white pawn on the 3rd or 4th rank that is attacked by at least one black piece and defended by at least one white piece.",
"sae_19155": "This feature detects an unattacked knight on the 3rd or 4th rank, with the king of the same color nearby (within 2 squares).",
"sae_19255": "A square is attacked by one white piece and one black piece, with the white king nearby.",
"sae_19322": "A black piece on the a or b file is attacked by a black piece and undefended by white.",
"sae_19183": "Detects a rook actively contesting or supporting an advanced passed pawn, typically in an endgame where promotion is the decisive factor.",
"sae_19336": "The feature detects squares that are attacked by an equal number of white and black pieces, with a preference for squares that are not occupied by a piece.",
"sae_19251": "Black's kingside rook on h8, with no immediate attackers or defenders, often due to a fianchettoed bishop or a pawn structure that leaves h7/g7/f7 vulnerable.",
"sae_19309": "Detects an empty square on the 1st rank (b1, f1, or g1) that is attacked by at least two white pieces and not attacked by any black pieces.",
"sae_19219": "This feature detects a white pawn on b4 or d3, attacking an empty square on b5 or d4, respectively, with at least one other white piece also attacking the target square, and the target square is either undefended or defended by a single black pawn.",
"sae_19333": "Detects squares on the 6th rank that are attacked by at least 2 black pieces and at most 2 white pieces.",
"sae_19351": "White King on f2/g1/h1, attacked by 0 black pieces, and defended by 0-1 white pieces, with a white Bishop nearby.",
"sae_19358": "Detects squares on the back rank that are attacked by a black piece, especially when the white king is on the back rank.",
"sae_19090": "A queen on the first rank, attacked by no white pieces, and attacked by at most two black pieces.",
"sae_19363": "White bishop attacks a black piece on a light square, with no other white attackers.",
"sae_19362": "White's f2/h2 pawn is attacked by 0-1 black pieces and defended by 2-3 white pieces, usually including a knight and/or bishop.",
"sae_19360": "General middlegame tension involving a contested pawn or piece on the side-to-move's half of the board.",
"sae_19396": "Black bishop actively placed on an open diagonal in a middlegame position where tactical threats (fork, pin, or mating attack) are imminent.",
"sae_19369": "A white piece on the 3rd or 5th rank is attacked by at least two white pieces and zero black pieces.",
"sae_19475": "White is attacking an empty square on the 6th rank, which is also attacked by at least 2 black pieces.",
"sae_19342": "A white rook is attacked by a black piece, and the rook is on a square where it is also attacked by a white piece.",
"sae_19447": "A pawn on the 7th rank that is not attacked by the opponent and not defended by the player.",
"sae_19364": "White King is on the same rank or file as the target square, with a Black King on the target square, and a Black Rook on the same rank or file as the target square, between the White King and the target square.",
"sae_19401": "This feature detects a bishop on a central square (d5, e3, b5, g2) that is attacked by at least one enemy piece and defended by at least one friendly piece, often with a pawn or knight involved in the defense.",
"sae_19418": "The king on the target square is attacked by exactly one enemy piece, and no friendly pieces defend the king.",
"sae_19397": "Detects a king on the first rank, with a pawn on the second rank directly in front of it, and another pawn on the third rank directly in front of that pawn, creating a pawn chain protecting the king.",
"sae_19481": "The feature detects squares that are attacked by multiple enemy queens, especially when the king is nearby.",
"sae_19427": "White rook or queen attacks an empty square on the 8th rank, which is also attacked by a black piece.",
"sae_19449": "Black's king-side rook on f8 is undefended by white pieces and attacked by at least 3 black pieces, often including a queen and knight.",
"sae_19479": "The feature detects a rook on the 4th or 5th rank that is not attacked by the opponent, especially when it is on an open file or semi-open file.",
"sae_19453": "A pawn on the 3rd, 4th, or 5th rank is attacked by an enemy piece, and the attacking piece is not a pawn.",
"sae_19500": "A white knight on a stable central or near-central square, participating in an attack or controlling key squares.",
"sae_19523": "A queen is on the first rank, attacked by at least one enemy piece, and not defended by any friendly pieces.",
"sae_19538": "A white bishop on its starting square (c1 or f1) that is attacked by at least one white piece and not attacked by any black pieces.",
"sae_19455": "The feature detects a king-side pawn push on h2 (or h1) by white, where the square is attacked by at least one white piece and at most one black piece, often with a white rook or queen on the h-file.",
"sae_19578": "Detects a queen on the back rank or 7th rank that is attacked by exactly one white piece and not attacked by any black pieces.",
"sae_19462": "Detects a black bishop on a central square (d6 or c5) that is undefended by white pieces and attacked by at least one black piece.",
"sae_19541": "White king on the back rank, black king on the back rank, with no white attackers on the black king.",
"sae_19637": "A square is attacked by at least two white pieces, with at most one black attacker, and is not occupied by a piece.",
"sae_19647": "White rook on its starting square (a1, d1, f1) is attacked by at least two white pieces and not attacked by any black pieces.",
"sae_19515": "The feature detects a black piece (often a bishop or knight) on a central square (d4, d5, e4, e5, f5, g4) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_19582": "The feature detects a target square on the 6th rank that is attacked by the side to move, and more heavily attacked by the opponent.",
"sae_19667": "Detects a white pawn on the 2nd rank that is attacked by a white piece and not attacked by a black piece.",
"sae_19551": "A pawn on the 4th rank (b4, e5, or f4) that is either undefended or equally defended by both sides.",
"sae_19624": "A white queen or rook attacks an empty square on the back rank, or a white rook attacks an empty square on the third rank.",
"sae_19662": "A pawn on its original square (b2 or g2) is attacked by exactly one friendly piece and not attacked by any enemy pieces.",
"sae_19383": "Black's king-side rook is on its starting square (h8), and the target square a8 is occupied by a black rook.",
"sae_19565": "The feature detects a pawn on c5 or c6 that is attacked by at least one black piece, and is either undefended by white or defended by only one white piece.",
"sae_19609": "The feature detects a square attacked by one white piece and one or two black pieces, where the white piece is a pawn or knight, and the black pieces are pawns or bishops, often on the 3rd or 4th rank.",
"sae_19686": "Detects an undefended back rank square (d8, e8, f8, g8, c8) that is attacked by at least 3 black pieces, with no white attackers.",
"sae_19687": "The feature detects a square on the a-file or h-file that is attacked by exactly two enemy pieces and no friendly pieces.",
"sae_19699": "The feature detects a white-to-move scenario where a white piece can attack a weakly defended empty square on the 6th rank, which is also attacked by multiple black pieces.",
"sae_19732": "Detects an empty square on the 2nd or 3rd rank, attacked by at least 3 white pieces and 0 black pieces, often in the center.",
"sae_19673": "Detects an empty square on the 5th or 6th rank that is attacked by the side to move, often with a pawn.",
"sae_19750": "A white bishop on the h-file (h4, h5, or h6) that is not attacked by any black pieces.",
"sae_19579": "Black's king is castled kingside, and the f8 square is attacked by multiple black pieces, with no white attackers.",
"sae_19530": "A square that is attacked by both sides, with white having at least one attacker and black having at least one attacker.",
"sae_19731": "White pawn on the 2nd rank (f2, e2, g2) attacked by 2-3 white pieces and 0 black pieces.",
"sae_19648": "A white rook on the first or second rank is attacked by a black piece and defended by at least one white piece.",
"sae_19690": "Detects a pawn on the 7th rank (for black) or 2nd rank (for white) that is attacked by the opponent and defended by at least one of its own pieces.",
"sae_19794": "Detects an unattacked black rook on the back rank, with no white pieces on the back rank.",
"sae_19746": "The feature detects a piece (often a rook or king) on the first or second rank that is attacked by an enemy piece and defended by at least one friendly piece, with the attacking piece often being a queen.",
"sae_19830": "The feature detects the h8 square being attacked by a black piece, especially when it's the king's castling square or a potential back-rank mate square.",
"sae_19811": "A pawn on f2, g2, or h2 is attacked by one black piece and defended by one white piece, with white to move.",
"sae_19841": "White King on g1, attacked by 0 black pieces, and defended by 1-2 white pieces, with a white Rook on f1 or h1.",
"sae_19815": "This feature detects squares that are attacked by at least two white pieces and no black pieces, with a preference for squares closer to the center and king-side.",
"sae_19838": "A black bishop on a light square with no white attackers.",
"sae_19839": "This feature detects a bishop on a central square (d5, c4, b5, c5, d3) or b7, which is attacked by at least one enemy piece and defended by at least one friendly piece.",
"sae_19843": "The feature detects a king on the back rank (7th or 8th) with a single black attacker on the h-file, and no white attackers on the target square.",
"sae_19860": "The feature detects a pawn on g7 or h7 that is attacked by a black piece and not attacked by a white piece, with the white king on the kingside.",
"sae_19801": "White pawn on 7th rank, one square away from promotion on 8th rank.",
"sae_19845": "White pawn on the 6th rank, attacked by a white piece, and not attacked by a black piece.",
"sae_19855": "Detects a king on the edge of the board, with a friendly rook or queen on an adjacent rank or file, and no enemy pieces attacking the king.",
"sae_19951": "Detects a black queen on its starting square (d8 or c8) that is attacked by at least 3 black pieces and 0 white pieces.",
"sae_19862": "This feature detects a White Rook on its starting rank (1st rank) that is attacked by at least one Black piece.",
"sae_19847": "The feature detects a pawn on the 5th, 6th, or 7th rank that is not attacked by white pieces.",
"sae_19858": "The feature detects squares attacked by two black pieces and one white piece, where the white king is nearby.",
"sae_19971": "Detects a black rook on f8, attacked by black pieces, with no white attackers.",
"sae_19898": "Detects a king on the target square that is not attacked by the opponent, especially when the king is on its starting square or in the endgame.",
"sae_19927": "Detects a square on the 6th rank that is attacked by at least 2 black pieces and at most 2 white pieces.",
"sae_19925": "The feature detects a pawn on the 4th, 5th, or 6th rank that is attacked by a rook.",
"sae_19922": "Detects a white knight on f3 or c3 attacking an empty square on g5, b5, or d7, often with another white piece also attacking the square.",
"sae_19900": "The feature detects a target square that is undefended by the side to move, but attacked by the opponent, and is on the same rank or file as the opponent's king.",
"sae_19840": "Black pawn on g7/h7 attacked by at least one black piece, with no white attackers, and a white knight on f3/f4/e4/d4/c4/b4/a4.",
"sae_19868": "The feature detects an undefended empty square on the 6th, 7th, or 8th rank that is attacked by at least one enemy piece.",
"sae_19869": "The feature detects squares on the back rank that are attacked by a rook or queen, with a king on the back rank and a knight blocking the attack.",
"sae_19975": "The feature detects an undefended black king on g8, with the white queen attacking it, and no other white pieces attacking g8.",
"sae_19829": "The feature detects a black pawn on the 7th rank that is not attacked by white and is part of a pawn chain, with a white pawn on the 6th rank directly behind it.",
"sae_19959": "A white rook on the first rank is attacked by a black piece, and the target square is the rook's current position.",
"sae_19979": "A square attacked by at least two enemy pieces, with the attacking side having fewer attackers on that square.",
"sae_19989": "A square on the 6th rank that is attacked by at least one white piece and at least one black piece, with black having more attackers than white.",
"sae_19984": "White's queen or bishop attacks the black h7 pawn, which is defended by a black king or pawn.",
"sae_20025": "White's attack on a black pawn on the h-file, especially h6 or h7, often with a queen or bishop involved, and sometimes with a sacrifice.",
"sae_20014": "A black piece (or empty square) on the 7th or 8th rank is attacked by a black bishop, with no white attackers.",
"sae_20010": "Detects an empty square on the 8th rank (a8 or b8) that is attacked by a black rook on the a-file or b-file, with no white pieces attacking it.",
"sae_20110": "Detects a black pawn on the 6th rank that is attacked by white and defended by black.",
"sae_20064": "Detects a square attacked by an enemy knight, with no friendly pieces attacking it, often on the opponent's side of the board.",
"sae_20061": "Detects an empty corner square (a8 or h8) that is not attacked by either side, with a friendly king nearby (within 2 squares).",
"sae_20145": "This feature detects empty squares on the first rank that are attacked by a black rook, especially when the white king is nearby.",
"sae_20130": "Detects a black queen on the first rank, attacked by no white pieces, and defended by at least one black piece.",
"sae_19995": "The feature detects a king on the first rank, with a queen and knight on the same rank or adjacent ranks, and the target square is a corner square on the first rank.",
"sae_20042": "The feature detects a king on the first rank, with the target square being a corner on that same rank, and no friendly pieces attacking the target square.",
"sae_20127": "This feature detects a square that is attacked by at least one black piece and is occupied by a white piece, with the white piece being attacked by at least as many black pieces as white pieces.",
"sae_20150": "A square on the 6th rank that is attacked by at least 3 black pieces and at most 2 white pieces.",
"sae_20124": "Detects a king on the 7th or 8th rank, with no immediate attackers from either side, and the side to move is white.",
"sae_20146": "A white queen is attacked by a single white piece, with the queen being the only piece on the target square.",
"sae_20152": "Detects squares on the 7th and 8th ranks that are attacked by a white knight on f4, with the white king on e7.",
"sae_20107": "A square on the 7th rank (or 2nd rank for Black) that is heavily attacked by the opponent and undefended by the side to move.",
"sae_20166": "The feature detects the h1 square being attacked by exactly two white pieces, with no black attackers, often with a white rook and king on the back rank.",
"sae_20207": "A pawn on b2 or g2 is attacked by exactly one white piece and no black pieces.",
"sae_20261": "Detects a black rook on the back rank (rank 8) that is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_20216": "The feature detects a white pawn on the 3rd or 4th rank that is attacked by at least one white piece and not attacked by any black pieces.",
"sae_20191": "Detects a pawn on the 2nd rank attacking an empty square on the 4th rank, with no enemy pieces attacking the target square.",
"sae_20250": "Detects a square attacked by at least one enemy piece, with no friendly attackers, and the square is on the 5th or 6th rank.",
"sae_20222": "The feature detects a king or pawn on the 7th rank (for black) or 2nd rank (for white) that is attacked by the opponent and undefended by its own side.",
"sae_20277": "A black pawn on the 6th or 7th rank that is not attacked by white pieces, and is often on the same file as a white pawn.",
"sae_20183": "Detects a black queen on the same rank or file as the white king, with no white pieces attacking the queen.",
"sae_20276": "A white rook or king is on the same rank or file as the target square, with no pieces between them.",
"sae_20278": "A white piece is attacked by a white queen and a white rook on the 3rd or 6th rank, with the target square being empty.",
"sae_20209": "Detects squares on the 6th rank (for white) or 3rd rank (for black) that are attacked by at least one enemy piece and not defended by any friendly pieces, especially when the target square is on the a or h file.",
"sae_20268": "A rook on its starting square (a1 or h1) that is currently undefended by any friendly pieces.",
"sae_20280": "This feature detects a king on the back rank that is not attacked, especially if it is a pawn on e4 that is attacked by one white piece and no black pieces.",
"sae_20251": "A black queen on the 5th or 6th rank is attacked once by white and defended once by black.",
"sae_20296": "The feature detects a king on the target square that is not attacked by the opponent, with a friendly pawn on an adjacent square.",
"sae_20264": "White rook attacks a pawn on the 6th or 7th rank, which is either undefended or defended by an equal number of black pieces.",
"sae_20111": "A pawn on the 2nd or 4th rank, attacked by an enemy piece and defended by a friendly piece, with the king nearby.",
"sae_20294": "The feature detects a square on the 3rd rank that is attacked by white and not heavily contested by black, often with a white pawn on the 2nd rank.",
"sae_20311": "This feature detects squares on the 2nd rank that are attacked by both a white rook and a black piece, with the white king nearby.",
"sae_20328": "Detects a pawn on the 2nd rank that is attacked by at least one friendly piece and not attacked by any enemy pieces.",
"sae_20326": "A square is attacked by at least one black piece, and not attacked by any white pieces.",
"sae_20302": "The feature detects a pawn on f2 or g2 that is attacked by Black and defended by White, with the White King often nearby.",
"sae_20363": "A black queen is attacked by at least one black piece, but by no white pieces.",
"sae_20317": "The feature detects a pawn on a2, regardless of its attackers or defenders.",
"sae_20358": "The king has at least one adjacent empty square available as an escape or manoeuvring route.",
"sae_20414": "This feature detects a white pawn on the 3rd or 4th rank that is attacked by at least one black piece and defended by at least two white pieces.",
"sae_20417": "Detects a rook on the first rank, with the target square being the corner of that rank, and no white pieces attacking the target square.",
"sae_20360": "Detects a knight on its starting square (b1 or b8) that is attacked by an enemy piece and undefended by friendly pieces.",
"sae_20408": "A black queen that has penetrated into white's territory (ranks 1\u20134), operating with limited immediate opposition.",
"sae_20387": "Black pawn on the 6th rank in a king-and-pawn endgame, often a passed or semi-passed pawn in a zugzwang-sensitive position.",
"sae_20421": "Detects a square attacked by a black knight, where the square is either undefended by white or defended by a white pawn.",
"sae_20426": "Detects an undefended enemy pawn on the 5th, 6th, or 7th rank, especially if it is a passed pawn or on the edge of the board.",
"sae_20438": "The feature detects a pawn on the 6th or 7th rank that is attacked by the side to move, and defended by the opponent.",
"sae_20407": "The feature detects a pawn on the 2nd rank (h2 or g2) that is attacked by one black piece and defended by one white piece, with the white king on the 1st rank.",
"sae_20401": "Detects a king on the back rank (7th or 8th) that is not attacked by the opponent, especially when the king is on the h-file or g-file.",
"sae_20478": "White Queen on the h-file attacking a square on the h-file, with a White King on the h-file.",
"sae_20457": "The feature detects a white pawn on the 5th rank (c5, d5, e5) attacking a square on the 6th rank (a6, c6, f6) that is undefended by white and attacked by black.",
"sae_20473": "This feature detects a pawn on the 3rd rank (for white) or 6th rank (for black) that is attacked by an enemy piece and defended by at least one friendly piece, often indicating a pawn structure or potential pawn break.",
"sae_20467": "Detects a black queen on the 6th or 7th rank, attacked by at least two black pieces, and not attacked by any white pieces.",
"sae_20531": "A black knight on the 7th or 8th rank, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_20508": "A pawn on the 7th rank (or 2nd for Black) that can promote to a queen on the 8th rank (or 1st for Black).",
"sae_20492": "Detects a king's castling square (f1/e1/d1) that is attacked by an enemy piece, but also defended by at least two friendly pieces.",
"sae_20499": "White king on the 6th or 7th rank, with a pawn on the 7th or 8th rank, and the target square is the 8th rank.",
"sae_20556": "A pawn on the 4th or 5th rank that is attacked by at least one enemy piece and defended by at least one friendly piece.",
"sae_20491": "Detects a black rook on the back rank (a8 or b8) that is not attacked by white, with varying levels of black defense.",
"sae_20594": "A black pawn on the 6th rank is attacked by at least one white piece and defended by at least one black piece.",
"sae_20544": "White King protecting a pawn on the 2nd or 3rd rank, often on the kingside.",
"sae_20536": "Detects an empty square on the first rank (or second rank for white) that is attacked by two white rooks and no black pieces.",
"sae_20593": "A square on the 3rd, 4th, or 5th rank that is attacked by at least two white pieces and at most one black piece.",
"sae_20538": "Detects a square attacked by a white Queen, especially when the square is on the back rank or near the white King.",
"sae_20566": "A piece is attacked by an enemy piece and defended by exactly one friendly piece, with the attacking piece being of lower value than the defended piece.",
"sae_20586": "White attacks an undefended or singly-defended black knight with at least one piece, often a pawn or queen.",
"sae_20683": "Positions featuring a queen with tactical potential, often in endgames with a discovered attack or fork available.",
"sae_20711": "White queen attacks a square on the 7th or 8th rank, which is not attacked by any black pieces.",
"sae_20633": "The King is attacked by exactly one enemy piece, and the King has no defenders.",
"sae_20715": "A square attacked by at least one black piece, with no white attackers, and the white king is nearby.",
"sae_20548": "White's knight on b1 is defended by at least one white piece and not attacked by any black pieces.",
"sae_20692": "This feature detects a black pawn on the 5th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_20700": "A white pawn attacks a square on the 5th or 6th rank, which is either undefended or defended by a black pawn.",
"sae_20765": "A square attacked by exactly one black piece, with no white attackers, that is adjacent to the black king.",
"sae_20728": "A square on the 3rd or 4th rank, on the a, b, g, or h files, that is attacked by an enemy pawn and potentially defended by a friendly piece.",
"sae_20773": "White Queen on the first rank, attacked by 0-1 black pieces, and defended by at least two white pieces.",
"sae_20740": "A white pawn attacks an empty square with no black defenders, typically in a pawn endgame.",
"sae_20712": "Detects a square attacked by two white pieces and one or zero black pieces, often near the black king.",
"sae_20790": "Detects a square attacked by a white king, with no black attackers.",
"sae_20780": "A pawn on the 6th or 7th rank is attacked by one white piece and defended by one or two black pieces.",
"sae_20774": "A knight on its starting square (or a square it could have started on) that is attacked by a friendly piece.",
"sae_20745": "A square is attacked by a black queen, and not attacked by any white pieces.",
"sae_20628": "A white bishop on an empty square, not attacked by black, and not attacked by white (except in one case).",
"sae_20810": "White's knight attacks a black knight on c6 or f6, which is defended by at least two black pieces.",
"sae_20809": "Detects advanced pawn promotion endgames where a passed pawn is on the 6th or 7th rank and both kings are actively contesting the promotion square.",
"sae_20834": "A white bishop on d3, attacked by no black pieces, and defended by at least one white piece.",
"sae_20786": "Detects a pawn on the 3rd or 4th rank that is attacked by one enemy piece and defended by one friendly piece.",
"sae_20843": "Detects a rook on its starting square (a8 or h8) that is not attacked by the opponent and not defended by the player.",
"sae_20785": "A square on the 4th or 5th rank is attacked by at least one white piece and not attacked by any black pieces.",
"sae_20770": "Active White rook threatening a decisive intrusion \u2014 7th rank penetration or back-rank mate setup.",
"sae_20766": "A square is attacked by one white piece and one black piece, with the square being empty.",
"sae_20849": "A black pawn on the 6th or 7th rank, undefended by other black pieces, and not attacked by white pieces.",
"sae_20878": "White pieces (especially knights and bishops) attacking a square on the 3rd rank, often with multiple attackers and few or no defenders.",
"sae_20858": "A vacant square on the back rank or h3/g1, attacked by multiple white pieces and no black pieces.",
"sae_20889": "A white rook on the first rank or an open file, coordinating with the king in an endgame deflection or skewer tactic.",
"sae_20900": "A square on the 5th, 6th, or 7th rank that is attacked by at least two enemy pieces and not attacked by any friendly pieces.",
"sae_20931": "White pawn on the 4th rank, attacked by 0-2 black pieces, with no white attackers.",
"sae_20903": "King endgame with active king opposition or key square control (pawn or bishop endgame).",
"sae_20869": "A weakly defended square targeted by a tactical piece move, typically in a mating attack or forcing sequence.",
"sae_20905": "A white pawn on the 4th rank that is attacked by at least one white piece and attacked by at most one black piece.",
"sae_20968": "A square on the 2nd or 3rd rank that is attacked by one white piece and one black piece.",
"sae_20933": "White pawn on the 2nd rank, attacked by a white piece (especially a rook or queen) and a black piece, with the white king nearby.",
"sae_21013": "A white pawn on g2 or a2 is attacked by exactly one white piece (a rook or queen) and no black pieces.",
"sae_20893": "A king is on the same rank or file as a rook, with no pieces between them, and the target square is on that rank/file, not between the king and rook.",
"sae_20941": "A white piece (often a queen or rook) attacks a black piece (often a queen or rook) on a square where the black piece is either undefended or defended by only one black piece.",
"sae_21060": "King is on the target square and is attacked by exactly one black piece, with no white defenders.",
"sae_21039": "A black queen on the first rank, attacked by at least one black piece, with no white attackers.",
"sae_20880": "Detects a Queen on the target square, with no attackers from either side, and the King of the opposite color is nearby.",
"sae_20984": "Detects an empty corner square (a8 or h8) that is undefended by either side, with the enemy king nearby.",
"sae_20995": "A square attacked by exactly one white piece and exactly one black piece, where the square is empty.",
"sae_20877": "A pawn or bishop on the same rank or file as the king, with no pieces between them.",
"sae_20954": "A king is on the same rank or file as a rook or queen, with an empty square between them, and the king is not attacked by the rook/queen.",
"sae_20958": "Black's king is castled kingside, and the f8 square is attacked by multiple black pieces, often including a queen on the queenside.",
"sae_20999": "A white knight on f3 or c3 attacks an empty square on h3 or a3, respectively, with no other white pieces attacking the square.",
"sae_21064": "A square on the 7th rank (d7 or e7) that is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_21070": "The feature detects a king on the second rank (from its own side's perspective) that is not attacked by the opponent.",
"sae_21153": "Detects a king on the same rank as a rook, with the target square being an empty square on that rank, and the king is not directly attacked by the rook.",
"sae_21154": "The feature detects squares that are attacked by two white pieces and defended by one black piece, often near the black king.",
"sae_21103": "A pawn on the 2nd rank (for the side to move) that is attacked by an enemy piece and defended by at least one friendly piece.",
"sae_21087": "The feature detects a pawn on the 7th rank (for white) or 2nd rank (for black) that is attacked by one enemy piece and defended by one friendly piece.",
"sae_21134": "Detects squares on the back rank or second rank that are undefended by the side to move, especially when the king is on the back rank.",
"sae_21102": "Empty square on the first two ranks, attacked by no white pieces, and potentially attacked by a black rook.",
"sae_21147": "White rook attacking a black piece (bishop or knight) that is defended by at least one black piece, with the white king nearby.",
"sae_21178": "A rook on its starting square (a1 or h1) that is not attacked and has no pieces directly in front of it on the first rank.",
"sae_21193": "White king is on the 6th rank, black king is on the 4th rank, and the target square is on the 8th rank.",
"sae_21261": "A rook on the back rank that is not attacked by the opponent and is not defended by its own side.",
"sae_21215": "Detects squares attacked by one white piece and one black piece, especially on the back rank or near the king.",
"sae_21165": "This feature detects a king being attacked by a queen on the same rank or file, with no pieces between them.",
"sae_21196": "Detects empty squares on the 8th rank that are not attacked by the opponent, especially when the king is on the 8th rank and there are rooks on the 7th rank.",
"sae_21231": "White's queen or rook attacks h4, which is undefended by black and not occupied by any piece.",
"sae_21274": "Detects a square attacked by one black piece and defended by one white piece, often a pawn, in the context of a king safety or pawn structure.",
"sae_21288": "A white rook attacks an empty square, which is also attacked by a black piece, and the white king is nearby.",
"sae_21296": "Detects a square that is attacked by white and black, with white having at least as many attackers as black.",
"sae_21293": "The feature detects an empty square on the 5th rank that is not attacked by white pieces, but is attacked or could be attacked by black pieces, especially a pawn.",
"sae_21262": "White King is on the second rank, and the target square is on the g-file, one or two squares away from the King, with no white attackers.",
"sae_21361": "[polysemantic \u2014 fires on multiple unrelated patterns; needs split]",
"sae_21053": "White's g7 pawn is undefended by white pieces and attacked by black pieces, with a black bishop on g7.",
"sae_21237": "A white pawn on the 4th rank (a4, b4, c4, etc.) with no black pawns on adjacent files on the 5th rank, and the target square is on the 6th rank on the same file as the white pawn.",
"sae_21354": "White attacks an empty square on the 5th, 6th, or 7th rank, which is defended by more black pieces than white pieces.",
"sae_21312": "A white knight on b5 or d5 attacking c7 or e7, which is also attacked by a black piece.",
"sae_21302": "White's rook or queen attacks a pawn on the 7th rank, especially when the pawn is also attacked by a black piece.",
"sae_21481": "White's queen attacks a square on the 7th rank (g7, h7, f7) that is defended by a black pawn, often with a king nearby.",
"sae_21554": "White pawn on the 3rd or 4th rank, attacked by white pieces, and not attacked by black pieces.",
"sae_21542": "A square attacked by at least one black rook, with no white attackers.",
"sae_21614": "A square is attacked by one white piece and two black pieces, with the white piece being a pawn or queen.",
"sae_21417": "Detects a square attacked by exactly one black pawn and no white pieces, where the square is on the 4th rank and the pawn is on the 5th rank.",
"sae_21497": "Detects an empty square on the back rank (a1, b1, g1, h1) that is not attacked by white and is a potential escape square for the king, or a square for a rook to move to.",
"sae_21583": "A pawn on the 6th rank (for white) or 3rd rank (for black) is attacked by an enemy pawn on an adjacent file.",
"sae_21601": "A white pawn on the 4th or 5th rank, attacked by a white bishop, with no black attackers.",
"sae_21646": "Detects a white queen attacking a square that is not attacked by black pieces, often on the kingside or near the king.",
"sae_21448": "White pawn on f2/g2 attacked by one black piece and defended by one white piece.",
"sae_21764": "A pawn on the 2nd rank is attacked by a black queen, with no white defenders.",
"sae_21704": "A square on the 4th, 5th, or 6th rank that is attacked by a white Queen and not attacked by any black pieces.",
"sae_21706": "Detects the h8 square being attacked by a black piece, with no white pieces attacking h8, and the white king on the back rank.",
"sae_21423": "A pawn on a7 or h7 that is attacked by at least one black piece and attacked by at most one white piece.",
"sae_21467": "A square attacked by one white piece and one black piece, where the white attacker is a pawn.",
"sae_21730": "Detects an empty square on the 2nd rank (d2, f2) or 1st rank (d1) that is attacked by at least two white pieces and zero black pieces.",
"sae_21412": "A white bishop on a central or kingside square, often undefended, with no black attackers.",
"sae_21707": "This feature detects a pawn on the 6th or 7th rank that is attacked by two white pieces and defended by two black pieces, often with a white knight or bishop involved in the attack.",
"sae_21820": "A square on the 6th rank that is attacked by White and heavily attacked by Black, with no piece on the square.",
"sae_21776": "A white rook on the back rank, defended by at least one other white piece, with no black attackers.",
"sae_21821": "White pawn on the 3rd rank, attacked by 0 black pieces, and attacked by 0 or 1 white pieces.",
"sae_21385": "A square on the first or second rank is attacked by one white piece and one black piece, and white has more total attackers on that square.",
"sae_21833": "A square is attacked by a black bishop, and the white king is on the same rank or file as the target square.",
"sae_21585": "Detects a pawn on the 7th rank (for white) or 2nd rank (for black) that is not attacked by the opponent.",
"sae_21461": "White rook attacks a black rook on the same rank or file, with no other pieces between them.",
"sae_21925": "Detects a black rook on the back rank (8th rank) that is undefended by white pieces and attacked by at least one black piece.",
"sae_21891": "A trapped or immobile knight in a king-and-pawn or minor-piece endgame, where the opposing king manoeuvres to win the knight or exploit its restriction.",
"sae_21870": "White is attacking a central square (d4, d5, e4) with 2 pieces, but it is over-defended by Black.",
"sae_21938": "Detects a square attacked by at least one black piece, with no white pieces on the square, and often with a white king nearby.",
"sae_21839": "Pawn on the 6th rank, with no pieces on the 7th or 8th rank in the same file, and no pieces on the 5th rank in the same file.",
"sae_21788": "A square on the back rank that is attacked by a white queen and defended by a black king.",
"sae_22144": "A black queen on the first or second rank, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_21973": "Pawn on the 2nd rank (b2, f2, h2) that is undefended by white pieces and not attacked by black pieces.",
"sae_21647": "White rook on the 7th rank, with a clear path to the back rank, targeting a square on the back rank.",
"sae_21501": "A white piece (often a pawn) on the 2nd rank is attacked by a white piece, and sometimes also by a black piece.",
"sae_22068": "A pawn on the 4th rank (for white) or 5th rank (for black) that is attacked by two enemy pieces and defended by one friendly piece.",
"sae_22002": "The target square is on the first rank, and the king is on the second rank, with a rook on the first rank, indicating a castling opportunity or a king safety issue.",
"sae_22136": "A pawn on the b-file is attacked by an enemy piece and defended by a friendly piece, with the target square being b3 or b4.",
"sae_21690": "The king is on its original square, or a square it could have moved to from its original square, and is attacked by at least one enemy piece.",
"sae_22029": "Detects a queen attacking a square on the 5th, 6th, or 7th rank, near the enemy king, that is also attacked by an enemy rook or pawn.",
"sae_22191": "A white queen or rook attacks a square on the kingside (h-file or g-file), which is also attacked by a black piece.",
"sae_22003": "A pawn on the h-file, on the 5th, 6th, or 7th rank, that is not attacked by white.",
"sae_21514": "Detects a pawn on the 2nd rank (for the side to move) that is undefended and not attacked by the opponent.",
"sae_21536": "The feature detects a target square that is currently undefended by White, but could be attacked by a White pawn or bishop if it were to move to an adjacent square.",
"sae_21795": "Black bishop on its starting square (c8 or f8) with no white attackers and at least two black attackers.",
"sae_22214": "A white rook or king attacks a square on the back rank or 7th rank, which is empty and not attacked by black.",
"sae_21431": "A key square near the enemy king attacked by two or more pieces from the active side, with no defenders \u2014 typically the mating square in an imminent forced mate.",
"sae_21954": "A white pawn on e4 or a black bishop on e7 that is attacked by at most one enemy piece.",
"sae_22229": "A white pawn on the 4th rank is attacked by at least one white piece and not attacked by any black pieces.",
"sae_21826": "The feature detects a white pawn on the 4th or 5th rank, attacked by no black pieces, and defended by exactly one white piece (a king or bishop).",
"sae_21878": "A pawn on the 5th, 6th, or 7th rank that is attacked by at least one black piece and attacked by at most one white piece.",
"sae_22253": "A square attacked by both sides, with the side to move having at least one attacker.",
"sae_21955": "King and pawn race in an endgame where king proximity to a passed pawn is the critical factor.",
"sae_22248": "Detects the f8 square being attacked by 3 or 4 black pieces, with no white attackers, and the white king on the kingside.",
"sae_22264": "A square is attacked by at least one black piece, but not by any white pieces, and is on the same rank or file as the white king.",
"sae_22231": "Detects a square on the back rank (or 7th rank for black) that is attacked by an enemy rook, where the square is either empty or occupied by a friendly rook, and is not defended by any friendly pieces.",
"sae_21676": "Detects a safe square for the king, often on the back rank or a corner, with at least one friendly attacker and no enemy attackers.",
"sae_21727": "A square on the 5th or 6th rank that is attacked by a black pawn, and not attacked by a white piece.",
"sae_22268": "White knight on d2 attacked by 0-1 black pieces and defended by 3-4 white pieces.",
"sae_22051": "White's queen or rook attacks a pawn on f7 or g7, which is defended by at least one black piece.",
"sae_22305": "The feature detects an empty square on the first rank that is not attacked by any piece, and is adjacent to the king.",
"sae_22335": "Black's rook on the back rank is attacked by at least one black piece, but not by any white pieces.",
"sae_22327": "A queen on the target square, attacked by at least one enemy piece, and not defended by any friendly pieces.",
"sae_22182": "Empty square on the back rank, behind a pawn, with a rook on the same rank and no other pieces between them.",
"sae_22116": "Detects an empty square on the 2nd or 3rd rank that is attacked by the side to move and not attacked by the opponent.",
"sae_22406": "Black pawn or knight attacks a square on the 7th or 8th rank, with no white attackers.",
"sae_22350": "The feature detects a white pawn on h2, attacked by at least one white piece and at most one black piece, often with a white king on g1 or h1.",
"sae_21793": "Detects a king on the back rank or near the back rank, with a friendly piece (often a rook or bishop) on the same rank or file, potentially creating a battery or protecting the king.",
"sae_22429": "A square is attacked by exactly one black piece and exactly one white piece, and is empty.",
"sae_21917": "White's queen attacks a square on the 2nd rank, which is also attacked by at least one other white piece and not attacked by any black pieces.",
"sae_22462": "White's king is castled kingside, and the g1 square is attacked by two white pieces (usually a rook and a knight or bishop) and not attacked by any black pieces.",
"sae_22411": "The feature detects an empty square on the back rank (f1 or d1) that is heavily defended by the side to move and not attacked by the opponent.",
"sae_22466": "The feature detects squares on the 2nd or 3rd rank that are two squares away from a friendly king, with a friendly pawn on the adjacent square.",
"sae_22385": "White King is on a square that is not attacked by any black pieces.",
"sae_21684": "A pawn on the 6th or 7th rank that is attacked by at least one enemy piece and not attacked by any friendly pieces.",
"sae_22468": "The feature detects a white pawn attacking an empty square, with the target square being attacked by at least one black piece.",
"sae_22476": "White pawn on g2/g3, attacked by white pieces and not attacked by black pieces.",
"sae_22551": "A white piece attacks a target square, which is either undefended or defended by one black piece, and the target square is on the 5th, 7th, or 8th rank.",
"sae_22479": "Detects squares that are attacked by a black pawn and not attacked by a white piece, often on the 6th rank.",
"sae_22519": "A white bishop on the second rank, especially on g2, with no black attackers.",
"sae_22402": "A rook is attacked by an enemy piece, and the rook is on its starting square (or a square it could have started on, like c7 for a rook from a8).",
"sae_22377": "Detects a square attacked by a black rook on the 6th rank, especially when the square is also attacked by a white queen.",
"sae_22522": "White pawn on the 5th rank is attacked by two black pieces and defended by one or two white pieces.",
"sae_22492": "Endgame with active white rook or bishop co-ordinating with a passed pawn, king not on back rank.",
"sae_22566": "White Queen on d1/b1, heavily defended by white pieces, with few or no black attackers.",
"sae_22552": "The feature detects a king on the 7th rank (or 2nd rank for Black) with a pawn on the 6th rank (or 3rd rank for Black) that can promote to the target square.",
"sae_22569": "A square attacked by exactly one white pawn and exactly one black pawn.",
"sae_22278": "The feature detects a square on the 2nd or 3rd rank that is attacked by a black pawn and is a potential king escape square.",
"sae_22574": "White Queen attacks an empty square on the back rank or 7th rank, with no black pieces attacking that square.",
"sae_22587": "Detects a queen on the 7th or 8th rank, not attacked by white, and often not attacked by black either.",
"sae_22272": "White's queen and/or rook attacks the king on the back rank, with the king having no escape squares.",
"sae_22613": "A square on the 2nd rank attacked by a black queen and defended by a white king.",
"sae_22675": "Detects a piece on the target square that is attacked by an enemy piece and not defended by a friendly piece.",
"sae_22672": "White Queen attacks an empty square on the h-file, with no Black attackers on that square.",
"sae_22710": "Black rook on a8, with no white attackers, and a white pawn on the a-file.",
"sae_22673": "A pawn on the 5th rank (for White) or 4th rank (for Black) that is attacked by an enemy pawn and undefended by friendly pieces.",
"sae_22652": "The feature detects an empty square on the first rank that is attacked by a white pawn on the second rank.",
"sae_22443": "Black king on e8 is attacked by at least two black pieces, with no white attackers.",
"sae_22425": "King on the back rank or near the back rank, attacked by an enemy piece, with no friendly pieces defending it.",
"sae_22660": "White rook actively placed on an open file or rank, often near the opponent's king, participating in tactical motifs such as skewer or interference.",
"sae_22691": "A pawn on the 4th or 5th rank is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_22431": "Detects empty squares on the 8th rank that are not attacked by the opponent, especially when the king is on the 7th rank.",
"sae_22761": "White's rook on the back rank, especially if it's the only piece on that rank or if the king is also on the back rank.",
"sae_22759": "Detects a rook on the 7th or 8th rank attacking an empty square, often with a king nearby.",
"sae_22742": "White pawn on 7th rank attacking an empty square on the 8th rank, with no black pieces attacking that square.",
"sae_22765": "Detects a rook on its starting square (a1 or h1) with no pieces directly in front of it on the 2nd rank, allowing it to move along the 1st rank.",
"sae_22776": "A square attacked by at least two enemy pieces, with at most one friendly attacker, and no friendly piece on the square.",
"sae_22795": "Detects squares that are undefended by the opponent and are on the same rank or file as the opponent's king.",
"sae_22703": "White rook attacking a black pawn on the a or b file, where the pawn is also attacked by a black piece.",
"sae_22322": "Kings in close proximity (within 2-3 squares) during endgame, neither in check.",
"sae_22785": "Detects a white knight on the 6th rank, with the target square being a forward square that the knight can move to.",
"sae_22743": "This feature detects a pawn on the 6th or 7th rank that is attacked by White and defended by Black, with White having fewer attackers than Black has defenders.",
"sae_22787": "A white rook on a central or semi-central square (d4, d2, b5, f2, a3) that is attacked by at least one white piece and at most one black piece.",
"sae_22685": "A white piece (knight, bishop, or rook) on a central square (c3, d4, e2, e3, f4) is attacked by at least two white pieces and zero black pieces.",
"sae_22800": "A pawn on the 2nd rank is attacked by a friendly piece and not attacked by an enemy piece.",
"sae_22846": "A square is attacked by white and defended by black, with the white king nearby.",
"sae_22804": "A rook on an open file or semi-open file, often attacked, and sometimes defended.",
"sae_22807": "A white bishop on its starting square (c1 or d2) is attacked by white pieces and not attacked by black pieces.",
"sae_22724": "A white pawn on the 4th or 5th rank is attacked by a black piece and defended by at least one white piece.",
"sae_22932": "Detects a black rook on the back rank (8th rank) that is not attacked by white pieces, often with multiple black defenders.",
"sae_22817": "A king on the 2nd or 3rd rank, with no attackers from either side.",
"sae_22906": "A knight on the 7th or 8th rank (for white) or 1st or 2nd rank (for black) that is not attacked by the opponent.",
"sae_22850": "A white rook or queen attacks a square on the 7th or 8th rank that is also attacked by a black piece, often a king.",
"sae_22639": "White rook on the first rank, attacked by at least two white pieces and no black pieces.",
"sae_22866": "White king is on the 3rd rank, and the black king is on an adjacent square, with no pieces between them.",
"sae_22612": "White attacks a black pawn on the 5th or 6th rank, which is defended by at least two black pieces.",
"sae_22951": "A white piece attacks a black pawn or bishop on the 6th, 7th, or 8th rank, with no black defenders.",
"sae_22998": "A knight on the 5th or 6th rank is attacked by one white piece and defended by two black pieces.",
"sae_22930": "White king safety: the king is on the back rank, and the target square is an empty square on the back rank next to the king.",
"sae_22712": "A king is on the 1st rank, and the target square is an empty square on the 1st rank, not attacked by white.",
"sae_22944": "Contested rank penetration by White's queen or rook with Black's pieces contesting the target square.",
"sae_22970": "A white queen attacks an empty square on the 7th or 8th rank, with no black pieces attacking that square.",
"sae_22720": "Detects a king's flight square that is attacked by an enemy piece, where the king is not currently in check.",
"sae_22719": "Detects a black rook on the 7th or 8th rank that is not attacked by white pieces, especially when it is on the same file as the black king.",
"sae_23068": "This feature detects a black knight on f6 (or f4) that is attacked by at least two black pieces and zero white pieces.",
"sae_23005": "The feature detects a king on the first rank, with the target square being an adjacent empty square on the first rank, and the king's side-to-move.",
"sae_23022": "A central square (d4 or e4) is attacked by 2-3 white pieces and 2-3 black pieces, with the target square being empty.",
"sae_23001": "A pawn on the 7th rank (for White) or 2nd rank (for Black) that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_23089": "Detects a black queen on d8 attacked by 3 or 4 black pieces, with no white attackers.",
"sae_23096": "Detects a square attacked by at least one white piece and not attacked by any black piece, often with a white bishop or pawn nearby, or the white king on the target square.",
"sae_23148": "The King is on a square attacked by no enemy pieces, but is adjacent to an enemy pawn.",
"sae_23217": "An empty square on the first rank that is attacked by a friendly rook on the same rank.",
"sae_23116": "A white piece on f2 (or d2) is attacked by two black pieces and defended by one or two white pieces.",
"sae_23177": "Detects squares attacked by the opponent twice and by the side to move once, or squares attacked by the opponent twice and not by the side to move.",
"sae_23272": "Detects a king on a square that is attacked by a queen, where the queen is on the same rank or file as the king, and there are no pieces between them.",
"sae_23228": "[polysemantic \u2014 fires on multiple unrelated patterns; needs split]",
"sae_23270": "A white bishop or knight on f1/g1 is attacked by no black pieces and defended by at least one white piece, with white to move.",
"sae_23088": "A square that is attacked by both sides, with the attacking pieces being a knight and a pawn for white, and a pawn for black.",
"sae_23297": "White pawn attacks a black pawn, with no black defenders, where the black pawn is on the 6th rank.",
"sae_23306": "Detects a black rook on its starting square (a8 or h8) with no immediate attackers, often in a position where the king has castled or is about to castle on the same side.",
"sae_23284": "Detects a square on the 8th rank that is attacked by at least two black pieces and at most one white piece.",
"sae_23240": "Detects a white piece attacking a square, with the target square being undefended or defended by a black piece.",
"sae_23221": "The feature detects squares on the a- or b-file that are attacked by a black rook on the 4th rank, with no white pieces attacking the square.",
"sae_23253": "A white bishop on the opponent's side of the board, often on the 6th, 7th, or 8th rank, that is either undefended or attacked by only one enemy piece.",
"sae_23372": "A white knight on the 3rd or 4th rank is a dominant piece in an endgame or middlegame, often threatening a fork or outpost on an advanced square.",
"sae_23374": "A white piece is attacked by one black piece and defended by one white piece on the 1st or 2nd rank, often a pawn or king.",
"sae_23362": "Detects a black knight on f6 or c6 that is attacked once by white and defended by at least two black pieces.",
"sae_23377": "A white pawn on the 3rd or 4th rank, on the same file as the white king, with no attackers.",
"sae_23289": "White's knight on d4/e5 attacks a central square (d5/d6/e7/f6) that is also attacked by a white pawn.",
"sae_23381": "Detects a knight on the second or seventh rank, especially when it's the only piece on that rank or near the edge of the board.",
"sae_23192": "White pawn on h3 or a4, attacked by at least one black piece, and defended by at least one white piece.",
"sae_23410": "A pawn tension square in the centre or endgame, contested by opposing pieces with the white pawn as the primary attacker.",
"sae_23401": "A queen is attacked by exactly one piece of the opposite color, and no pieces of its own color.",
"sae_23411": "A square that is attacked by at least one white piece and at least one black piece, with white having a net positive attack count (white_attackers - black_attackers > 0).",
"sae_23430": "White's f1 square is empty and attacked by at least 2 white pieces, with no black attackers.",
"sae_23327": "The feature detects a pawn on the 5th, 6th, or 7th rank that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_23434": "Detects a black rook on the back rank (rank 8 or 7) that is not attacked by white pieces.",
"sae_23457": "Detects an undefended back rank square (a8 or h8) that is attacked by at least one enemy piece.",
"sae_23470": "Detects a pawn on the 5th or 6th rank that is attacked by at least one black piece, and is either undefended or defended by fewer white pieces than black attackers.",
"sae_23459": "Black knight on b8 or g8, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_23473": "White's pawn on the 4th rank attacks an empty square on the 5th rank, with no black pieces attacking that square.",
"sae_23484": "A square attacked by at least two enemy pieces, with at most one friendly attacker, and the target square is on the 3rd rank.",
"sae_23505": "Detects a black knight on f6 that is attacked by white and defended by black.",
"sae_23577": "Detects a black bishop on a square that is not attacked by white, but is attacked by black.",
"sae_23479": "A square attacked by 3 black pieces and 1-2 white pieces, often a pawn or knight, with white to move.",
"sae_23563": "White pawn on the 2nd, 3rd, or 4th rank, with no attackers or defenders, and the white king is nearby.",
"sae_23499": "White pawn on a2/h2 attacked by at least one black piece, and defended by exactly one white piece.",
"sae_23607": "A kingside h- or g-file pawn (for the side to move) on rank 7 that is undefended and under attack, in positions with active kingside play.",
"sae_23625": "A white piece attacks an empty square on the 6th, 7th, or 8th rank, with no black pieces attacking it.",
"sae_23640": "A white king is attacked by a black queen, and the target square is the only square the king can move to escape the check.",
"sae_23641": "The feature detects an empty square on the 8th rank that is not attacked by any piece, with the white king on the 6th rank or below.",
"sae_23645": "A white pawn on d5 or c5 is attacked by 2 white pieces and 0 black pieces, or a white pawn on d6 or c6 is attacked by 2 white pieces and 1 black piece.",
"sae_23642": "The feature detects a white pawn on the 2nd rank that can advance two squares to attack a black piece or pawn.",
"sae_23644": "This feature detects a pawn on the 6th rank that is attacked by an enemy piece and is either undefended or defended by only one friendly piece.",
"sae_23675": "White's king-side rook is on its starting square (h1) and the f2 pawn is advanced, leaving the king's castling position vulnerable.",
"sae_23689": "A square is attacked by one white piece and one or more black pieces, with the white piece being a Queen or Bishop.",
"sae_23652": "Detects squares on the 8th rank that are not attacked by the opponent, especially when the king is on the 7th rank.",
"sae_21787": "White king is on the first rank, flanked by white pieces providing cover (typical post-castling king safety structure).",
"sae_23684": "Detects a black queen or bishop on a light square, often on the 4th, 5th, or 6th rank, that is undefended by black pieces and unattacked by white pieces.",
"sae_23713": "White pawn on a2 or h2, attacked by 1-2 white pieces and 0-1 black pieces, with white to move.",
"sae_23754": "A square attacked by two white pieces and one black piece, where the white king is nearby and the black king is not.",
"sae_21894": "The feature detects a white king being attacked by a black pawn on an adjacent square, with the target square being a safe square for the king to move to.",
"sae_23726": "A black pawn on the 4th rank (c4, c6, f6, g6) that is attacked by at least one black piece and is not attacked by any white pieces.",
"sae_21944": "Detects a pawn on the 7th rank (or 5th rank for black) that is attacked by white and defended by black, especially when it's the f7 pawn.",
"sae_23760": "Detects a white rook on the 7th rank, with the target square being the 8th rank, and no pieces on the 8th rank blocking the rook's path.",
"sae_23739": "Detects squares attacked by a queen that are also adjacent to the enemy king.",
"sae_23779": "This feature detects a knight on d5 or e5 that is attacked by at least as many enemy pieces as it is defended by friendly pieces.",
"sae_23764": "A rook poised to deliver or support a back-rank mate, often on an open file aligned near the enemy king.",
"sae_21993": "A white queen is on the 5th or 6th rank, undefended, and attacking a black king on the back rank.",
"sae_23811": "A pawn on the 2nd rank (b2 or g2) that is attacked by at least one white piece and not attacked by any black pieces.",
"sae_23827": "Detects a square on the 6th or 7th rank that is attacked by no white pieces and at most one black piece, often with a pawn on an adjacent file.",
"sae_23826": "Pawn endgame with mutual zugzwang, where one side's pawn advance is critical and the position is a reciprocal blockade.",
"sae_22224": "White's king's rook is on the a-file, and the target square is c1 or d1, which are often the squares where the queen or king's bishop would be developed.",
"sae_23837": "A square is attacked by at least one white piece, and not attacked by any black pieces.",
"sae_23838": "A white rook on its starting square (a1, c1, d1, e1, h1) with no attackers.",
"sae_23904": "A white knight on b1 or g1, defended by at least one white piece, with no black attackers.",
"sae_23870": "Detects squares that are empty, undefended by the side to move, and are potential targets for a king to move to.",
"sae_22308": "Detects a black bishop on f8, where f8 is not attacked by white pieces.",
"sae_23934": "Detects a king on a square with few (0-2) friendly defenders and no enemy attackers, typically cornered and facing imminent mate.",
"sae_22274": "A white pawn on the 3rd rank (b3, d3, f3, h3) that is attacked by at least one black piece and defended by exactly one white piece.",
"sae_23911": "This feature detects a white bishop on a central square (c3, d3, d5) that is attacked by at least one black piece and defended by at least one white piece, with white having at least as many attackers as black.",
"sae_23935": "This feature detects a king on the second rank, with no attackers on the king, and no white attackers on the target square.",
"sae_22364": "A white piece attacks a black piece, which is either undefended or defended by an equal number of black pieces.",
"sae_23963": "White's queen or bishop attacks a black pawn on g7 or h7, which is also defended by a black piece.",
"sae_23972": "Detects a square on the 7th or 8th rank that is attacked by both sides, with the attacking side having a queen or rook.",
"sae_23961": "White pawn on the 6th rank (or 3rd rank for Black) that is attacked by at least one white piece and is either unattacked or attacked by one black piece.",
"sae_23998": "The feature detects a pawn on the 7th rank (b7 or e7) that is attacked by one white piece and defended by one black piece.",
"sae_24002": "A white knight on a central square (d5, d6, e5, g5) that is attacked by one black piece and attacked by at least one white piece.",
"sae_24013": "A white piece attacks a square that is also attacked by a black piece, and the square is empty or contains a black pawn.",
"sae_23996": "Detects king opposition or a key king square in a pure pawn endgame where zugzwang or the opposition decides the outcome.",
"sae_24014": "Detects a black bishop on the 2nd rank, with no white attackers, and a white rook on the same rank.",
"sae_24019": "A white bishop is attacked by a black piece, and the bishop is on a square where it is also attacked by a white piece (or could be captured by a white piece if it were black).",
"sae_24026": "A square on the 7th or 8th rank is attacked by exactly one black piece and not attacked by any white pieces.",
"sae_24016": "Detects a white bishop on a square with no black pieces, where the bishop is not attacked by black pieces, and is on a square that is not on the first rank.",
"sae_24030": "Detects empty squares on the 3rd rank that are attacked by a queen and not defended by any white pieces.",
"sae_24058": "A white rook on the first rank, attacked by at least one white piece and at most one black piece.",
"sae_24051": "A knight is on a central square (f3 or c3) and is attacked by at least one friendly piece, with no enemy attackers.",
"sae_24049": "The target square is attacked by an enemy rook, and is on the same rank or file as the friendly king.",
"sae_24096": "Detects a square attacked by two black pieces, with at most one white attacker, often a pawn, and the square is usually in the center or kingside.",
"sae_22711": "A white piece (often a bishop) attacks a square on the 7th rank (g7 or h7) that is also attacked by a black piece, often a pawn, with no piece on the target square.",
"sae_24102": "f1 is empty and under pressure from white king and rook, in an uncastled position with king on e1.",
"sae_24119": "White King is on the 2nd rank, adjacent to the target square, which is on the 1st rank.",
"sae_24081": "A square on the back rank (rank 8 for white, rank 1 for black) that is attacked by at least 2 enemy pieces and not attacked by any friendly pieces.",
"sae_24133": "A pawn on a square that is attacked by an enemy piece and not defended by a friendly piece.",
"sae_22684": "A square is attacked by multiple black pieces and undefended by white, often a pawn or king-side square.",
"sae_24149": "White rook on the first rank, attacking an empty square on the first rank, with no black attackers.",
"sae_24142": "White King and Queen are on the same rank/file/diagonal, with the target square being a corner square on that line, and the black king is nearby.",
"sae_24134": "Detects a square on the 6th or 7th rank that is attacked by a black rook and potentially attacked by a white queen, often near the black king.",
"sae_24177": "A square is attacked by one white piece and one or two black pieces, with the target square being empty.",
"sae_24155": "A pawn on the 4th rank (a4, e4, f4) or 3rd rank (f3) is attacked by a black piece and undefended by white, with the white king nearby.",
"sae_24209": "Detects a king on the back rank, with the target square being a potential escape square on the back rank, especially when the king is in check or under attack.",
"sae_22871": "White king on g1, white rook on f1, and white bishop on e1, with the h1 square attacked by a white piece (usually the rook on f1).",
"sae_24163": "A square attacked by at least one black piece and zero white pieces, often a pawn or bishop, with the white king nearby.",
"sae_24253": "A square attacked by at least one black piece and zero white pieces, often near the white king or a white queen.",
"sae_24263": "Detects squares around the enemy king that are attacked by an enemy queen, especially when the king and queen are close.",
"sae_24230": "A white queen is attacked by a white piece, but not by any black pieces.",
"sae_23072": "White Queen attacking a square on the 7th or 8th rank, often near the Black King, with no Black defenders.",
"sae_24272": "A white pawn is attacked by one black piece and defended by one or two white pieces, with the white king nearby.",
"sae_24288": "A white rook on the first rank, potentially undefended, and not on its starting square.",
"sae_24337": "King on a square attacked by an enemy piece, with the king's side to move.",
"sae_24350": "White Queen on d1, attacked by multiple white pieces, with no black attackers.",
"sae_24342": "White king safety is compromised by a black rook on the same rank/file as the white king, with no white pieces defending the king.",
"sae_24334": "White rook on the 6th rank or higher, targeting a corner square on the 1st rank, with the white king on the 3rd rank or higher, and no pieces on the target square.",
"sae_23044": "Detects an empty square on the first rank that is a potential castling square for the white king, with no immediate threats.",
"sae_23062": "Detects a black piece (Bishop or Knight) on the 7th rank (b7, c7, d7, f7) that is attacked by exactly one black piece and not attacked by any white pieces.",
"sae_23035": "Detects a Queen on the target square that is attacked by exactly one enemy piece and not defended by any friendly pieces.",
"sae_24361": "Detects a white rook or queen attacking a black rook or queen on an open file/rank, with no black defenders.",
"sae_24260": "A queen attacking an empty square, with no black pieces attacking that square.",
"sae_24372": "Black queen actively participating in a mating attack, often with supporting black pieces on nearby files or ranks.",
"sae_23147": "A white rook or queen attacking a square on the first rank, often the target of a discovered attack or a back-rank mate threat.",
"sae_23158": "White's second rank is attacked by a black rook, and defended by white pieces, with the target square being empty.",
"sae_24369": "Black's back rank or 7th rank is attacked by at least one black piece, and not attacked by any white pieces.",
"sae_23066": "A white rook on the first rank is attacked by a black rook on the same rank, with the target square being the intersection of the two rooks' attack lines.",
"sae_24416": "A pawn on the 7th rank (or 6th for black) that is not attacked by the opponent and is not defended by the same side.",
"sae_23246": "A white pawn on the 4th or 5th rank, attacked by one white piece and zero black pieces, often with a white king nearby.",
"sae_24379": "A square attacked by at least one black piece, with no white attackers, and often a pawn on the 7th rank (for black) or 2nd rank (for white) nearby.",
"sae_24381": "A square attacked by a black pawn, with no white attackers, and the square is on the 4th rank.",
"sae_24173": "A Queen on a central square (d5, c4, f3, e2) that is attacked by one enemy piece and defended by one or two friendly pieces.",
"sae_24429": "White's a1 rook is trapped behind its own pawns and/or pieces, with no clear path to activity.",
"sae_23283": "A white piece attacks a black piece on the 2nd or 3rd rank, where the black piece is on a light square.",
"sae_24440": "A square on the 6th or 7th rank (from white's perspective) that is attacked by a black piece and is either attacked by a white queen or is one square away from a white queen.",
"sae_23300": "An advanced passed pawn on the 5th or 6th rank in a pawn/minor-piece endgame with a promotion threat.",
"sae_24471": "A white knight on f5 or g5 attacks h6, which is attacked by a black pawn on g7.",
"sae_24448": "Detects an empty square on the b-file or h-file that is attacked by White and not attacked by Black, often with a White pawn on an adjacent square.",
"sae_23150": "This feature detects a white pawn on the 4th rank (d4, e4) supporting a white knight on the 5th rank (c5, d5, f5) which is attacked by a single black piece.",
"sae_24524": "Detects a king on the first rank that is attacked by an enemy queen.",
"sae_24503": "A pawn push to a square that is not attacked by the opponent, often creating a passed pawn or opening lines.",
"sae_24526": "Detects a pawn on the 4th or 5th rank that is attacked by at least two pieces and defended by at least two pieces, with the attacking side having at least one more attacker than the defending side.",
"sae_24553": "A pawn on the 5th rank (for white) or 4th rank (for black) that is attacked by the opponent and defended by the side to move.",
"sae_23355": "White pawn on f2 (or c2) attacked by at least one white piece and not attacked by any black pieces.",
"sae_24447": "Black king in an active endgame role, often contesting key squares or supporting passed pawns, across various ranks.",
"sae_23321": "A square is attacked by at least one black piece, and not attacked by any white pieces.",
"sae_24435": "King-and-pawn endgame with centralised kings and zugzwang dynamics, no minor pieces.",
"sae_24470": "A pawn on the 3rd or 4th rank is attacked by an enemy piece, and is undefended by a friendly piece.",
"sae_23496": "Black queen on d8 attacked by at least two black pieces, with no white attackers.",
"sae_23542": "Black knight advanced to ranks 6\u20138, uncontested by white, in a middlegame or endgame context.",
"sae_23547": "A white rook on the 6th or 7th rank, behind a pawn, with no immediate attackers or defenders.",
"sae_24484": "Black has multiple pieces attacking the f8 square, which is empty and on the back rank, with no white defenders.",
"sae_24520": "White's queen or rook attacks the g7 pawn, which is defended only by the black king.",
"sae_23654": "White's pieces are highly concentrated on the 2nd rank, especially on e2, with multiple white attackers and no black attackers.",
"sae_23681": "A white pawn attacks an empty square, which is either undefended or defended by more black pieces than white pieces.",
"sae_23685": "Black rook on a mid-rank in a tactically active position, often involved in a mating net or deflection.",
"sae_23735": "A square is attacked by multiple enemy pieces, with no friendly defenders.",
"sae_23932": "The king is on the target square and is not attacked by the opponent, but is vulnerable to a discovered attack or a back-rank mate.",
"sae_24057": "Detects a black rook on its original square (d8, f8, or h8) that is undefended by white and attacked by at least two black pieces.",
"sae_24147": "Detects a square on the 7th rank (or 1st rank for black) that is undefended by the side to move and heavily attacked by the opponent.",
"sae_24159": "A square on the back rank (1st or 8th) that is attacked by the side to move and defended by the opponent, with no piece on the square.",
"sae_24165": "A white rook on the 7th rank (or 2nd rank for black) with no friendly pawns on the 7th rank, targeting a square on the 8th rank (or 1st rank for black) that is not attacked by black.",
"sae_24178": "A knight on an outpost or advanced square that is actively contested between the two sides.",
"sae_24540": "The feature detects the g8 square as a potential target for a back-rank mate or attack, often with a black king on g8 or h8, and a black rook on f8 or h8, with white pieces aiming at the back rank.",
"sae_24590": "This feature detects a king on the target square that is attacked by exactly one enemy piece and defended by at most one friendly piece.",
"sae_24610": "A white rook attacks an empty square on the 7th or 8th rank, with no black pieces attacking that square.",
"sae_24576": "A queen attacking a square on the 6th, 7th, or 8th rank, where the square is undefended by the opponent.",
"sae_24643": "The feature detects a black pawn on the 6th or 7th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_24662": "The feature detects a square that is attacked by at least one black piece and not attacked by any white piece, with a preference for squares on the second rank or near the opponent's king.",
"sae_24647": "The feature detects a white rook attacking an empty square on the first rank, which is also attacked by a black rook.",
"sae_24696": "A rook on its starting square (d1 or e1) that is attacked by a friendly rook.",
"sae_24764": "White's king is castled kingside, and the f1 rook is heavily defended by white pieces, with no black attackers.",
"sae_24777": "A white knight attacks a square on the 6th or 7th rank, which is either empty or occupied by a black pawn, and is not attacked by black.",
"sae_24730": "This feature detects a castled king on g1 (or c1) that is attacked by at least one friendly piece and not attacked by any enemy pieces.",
"sae_24793": "The feature detects the h8 square being attacked by at least two black pieces, with no white defenders, and the white king is on the back rank.",
"sae_24769": "Detects an empty square attacked by at least one black piece, and optionally attacked by white pieces.",
"sae_24798": "The white king is on the 2nd or 3rd rank, with a white pawn on an adjacent square on the same rank or one rank forward.",
"sae_24823": "This feature detects a piece on a central square (c3, d4, e3, a5) that is attacked by both sides, with the attacking side having at least as many attackers as the defending side.",
"sae_24805": "A rook is active on an advanced rank in a rook endgame with a passed pawn and promotion threats.",
"sae_24866": "Detects back-rank mate threats or endgame positions where black has a lone king on the back rank with limited escape squares.",
"sae_24897": "The feature detects a king on an edge square that is attacked by a queen from a diagonal, with no other pieces blocking the attack.",
"sae_24629": "This feature detects a white bishop on c1 or e2, attacked by one white piece and one black piece.",
"sae_24893": "The feature detects a white pawn on the 4th, 5th, or 6th rank that is attacked by one black piece and defended by one white piece.",
"sae_24913": "A square is attacked by at least one black piece and not attacked by any white piece, with the target square being on an open file or an open diagonal.",
"sae_24732": "White's g2 pawn is attacked by a black piece (often a bishop or queen) and defended by a white piece (often a knight or bishop), with the white king on g1 or h1.",
"sae_24909": "A queen attacking an undefended square on the back rank or a pawn on the 7th rank.",
"sae_24759": "The black king's bishop is on f8, attacked by multiple black pieces, with no white attackers.",
"sae_24940": "A rook on the same rank or file as the target square, attacking it, with no other pieces attacking the target.",
"sae_24945": "A white knight attacks a square on the 3rd or 7th rank, which is not attacked by black pieces.",
"sae_24933": "The feature detects a pawn on the 5th rank (for White) that is attacked by at least two enemy pieces and defended by at least one friendly piece.",
"sae_24907": "The feature detects an undefended square on the first two ranks, attacked by a black piece, or undefended by any piece.",
"sae_24903": "The feature detects a black king on h8, or an empty h8 square attacked by a black piece, with no white attackers, and a white queen or rook on the a-file or b-file.",
"sae_24959": "White king on the 2nd rank, with a pawn on the 3rd rank, and the target square is the 1st rank, with no pieces on the 1st rank.",
"sae_24914": "A white rook or queen attacks an empty square on the back rank, which is also attacked by a black piece.",
"sae_24760": "The feature detects a king on the first rank, with an empty adjacent square on the first rank that is not attacked by the opponent.",
"sae_24705": "The feature detects an empty square on the back rank that is not attacked by the side to move.",
"sae_25060": "Detects an active knight (either colour) in the middlegame or endgame, regardless of rank or attack status.",
"sae_24993": "The feature detects a pawn on the 4th rank (for white) or 5th rank (for black) that is attacked by at least one enemy piece.",
"sae_25041": "The feature detects squares attacked by both sides, especially when the white king is nearby and the target square is on the a-file or 8th rank.",
"sae_25006": "Detects a square on the back rank (or c1 in one case) that is attacked by the opponent and undefended by the side to move, often with a king nearby.",
"sae_25013": "The feature detects an empty square on the first rank that is not attacked by white and is a potential target for a rook or queen to move to, often to deliver check or attack the king.",
"sae_25038": "The feature detects a target square on the 7th or 8th rank that is attacked by a rook, with the opposing king nearby.",
"sae_24965": "Black knight in the centre or on the 4th\u20137th rank, undefended and not attacked by white.",
"sae_25062": "This feature detects a King on the target square, attacked by exactly one enemy piece, with no friendly pieces defending the King.",
"sae_25092": "A lone rook in an endgame position separated from its king, typically on the back rank or second rank.",
"sae_24899": "This feature detects a black knight on a central square (d5, c5, f5, f6) that is attacked by at least two black pieces and is either undefended or defended by fewer white pieces.",
"sae_25024": "The feature detects a white pawn on the 2nd or 3rd rank that is attacked by a black piece, with the target square being the pawn's current position or a square it could move to.",
"sae_25049": "The feature detects an undefended black knight on the 6th or 7th rank, attacked by at least two white pieces.",
"sae_24901": "Detects a pawn on the 6th rank that is not attacked by the opponent and is not defended by the side to move.",
"sae_25097": "The feature detects a black pawn on h7 or a6, attacked by at least two black pieces, with no white attackers.",
"sae_25066": "A rook on its starting square (a1 or h1) that is not attacked by the opponent, especially if it is the only piece on that square.",
"sae_24976": "This feature detects a white knight on a central square (c3, f3) or a white bishop on g4, which is attacked by at least one black piece and defended by at least one white piece, with the number of black attackers being equal to or greater than the number of white attackers.",
"sae_25135": "This feature detects a knight on a central square (d4, d5, e4, e5) or a square on the 5th rank, that is attacked by at least one white piece and at least one black piece.",
"sae_25149": "Detects an uncastled white king on e1 with the h1 rook still on its starting square and kingside castling rights intact.",
"sae_25162": "The feature detects a black rook on h8, with no white attackers, and a white king on g1 or h1, indicating a potential for a back-rank mate or a vulnerable king position.",
"sae_25123": "This feature detects a pawn on the 6th rank (for White) or 3rd rank (for Black) that is attacked by both sides, with the attacking side having at least as many attackers as the defending side.",
"sae_25088": "Detects an undefended back-rank square (d8 or f8) that is attacked by multiple black pieces.",
"sae_25226": "A white pawn on the 7th rank, with the white king nearby, is promoting to a queen on the 8th rank.",
"sae_25177": "This feature detects a white pawn on an open central file (d or f) that is attacked by at least one black piece and defended by at least one white piece.",
"sae_24918": "A white knight on its starting square (b1 or g1) is attacked by at least one white piece and not attacked by any black pieces.",
"sae_25275": "A square singly controlled by a black piece with no white attackers, irrespective of side to move.",
"sae_25185": "This feature detects a pawn on the 5th rank (d5, e5, g3) that is attacked by both sides, with the attacking side having at least as many attackers as the defending side.",
"sae_25296": "This feature detects a square that is attacked by two white pieces and one black piece, making it a potential capture or outpost for White.",
"sae_25309": "This feature detects a square that is attacked by at least two black pieces and at most one white piece, often a pawn or a knight, with white to move.",
"sae_25287": "A square is attacked by at least two enemy pieces, and by at most one friendly piece.",
"sae_25080": "This feature detects a white king safety issue, specifically when the king is castled kingside and the g-pawn is missing, allowing a potential back-rank or kingside attack.",
"sae_25175": "This feature detects a black pawn on the 5th or 6th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_25302": "This feature detects a white bishop on its starting square (c1 or f1) that is attacked by at least two white pieces and zero black pieces.",
"sae_25264": "The feature detects squares attacked by at least two black pieces, with at most one white attacker, often on the 3rd or 4th rank.",
"sae_25311": "A white bishop is attacked by 0 black pieces and defended by 2 white pieces, with at least one defender being a pawn.",
"sae_25344": "This feature detects a rook's potential to attack a square on an open file, especially if it's a pawn.",
"sae_25256": "Detects squares on the 6th, 7th, or 8th ranks that are attacked by the opponent's king and are not attacked by the friendly king.",
"sae_25378": "Black bishop on an active diagonal that is contested or under exchange pressure from a white minor piece.",
"sae_25227": "Detects a Queen on the 5th rank, attacking a corner or edge square on the opposite side of the board from the King.",
"sae_25367": "This feature detects a square attacked by a white queen and a black queen, with the white queen being the only white attacker.",
"sae_25345": "Detects a black piece on the back rank (rank 8 or 1) that is attacked by white, especially when the piece is a rook or bishop.",
"sae_25395": "A white piece attacks a black knight that is attacked by multiple black pieces, making the knight a potential target for capture.",
"sae_25426": "The feature detects a pawn on the second rank (for white) or seventh rank (for black) that is undefended and attacked by an enemy piece, or is undefended and on an open file.",
"sae_25455": "This feature detects a rook on the second rank attacking an empty square on the 7th or 8th rank, with the white king on the 3rd rank.",
"sae_25496": "This feature detects a pawn on d5 or e5 that is attacked by 2 white pieces and 2-4 black pieces, with white to move.",
"sae_25536": "White Queen attacks an empty square on the back rank, which is defended by at least one black piece, with the white Queen being the only white attacker.",
"sae_25514": "Detects an empty square on the back rank (rank 8 for white, rank 1 for black) that is heavily attacked by the opponent's pieces (3 or more attackers) and undefended by the side to move.",
"sae_25446": "A queen is on its starting square (or a square it could have started on) and is attacked by at least one friendly piece.",
"sae_25570": "This feature detects a queen attacking a square on the 6th, 7th, or 8th rank, with no black defenders.",
"sae_25502": "Detects a Black rook on the 5th or 6th rank, attacked by at least one White piece, often with equal or fewer Black defenders.",
"sae_25431": "This feature detects a square on the first rank (or 8th rank for black) that is attacked by at least two pieces of the side to move and only one piece of the opponent.",
"sae_25391": "A black bishop is attacked by at least one black piece, but by no white pieces.",
"sae_25416": "This feature detects a white rook on the 5th rank, attacking an empty square on the same rank, with the black king on the 5th rank.",
"sae_25580": "The feature detects a square attacked by a white rook and a white pawn, and defended by a black piece (pawn or king), with the target square being on the 7th or 8th rank.",
"sae_25617": "Detects a king on the first rank, with an empty square on the same rank and adjacent file, which is not attacked by white.",
"sae_25631": "A queen that is not attacked by any enemy pieces, in a complex middlegame or endgame position.",
"sae_25650": "Detects a pawn that is attacked by an enemy piece and is undefended by friendly pieces.",
"sae_24659": "The feature detects an empty square on the back rank (rank 8 for white, rank 1 for black) that is attacked by at least one enemy piece, with the king on the same back rank.",
"sae_25659": "The target square is attacked by Black and not attacked by White, and is on the 3rd or 6th rank, often near the king.",
"sae_25641": "King centralised on the 4th rank or higher, not currently in check, in a tactically active middlegame.",
"sae_25668": "White Queen on d1, attacked by at least one white piece, and not attacked by any black pieces.",
"sae_25695": "Detects a white rook on the a-file, with the target square being a square on the 8th rank, and no other pieces between the rook and the target square.",
"sae_25726": "A black queen or rook on a square that is under threat or being exchanged in a tactical endgame.",
"sae_25770": "This feature detects the king on its starting square (e1, g1, c1, h1, a1) with at least one attacker and defender.",
"sae_25754": "The feature detects an undefended empty square that is attacked by one white piece and one black piece, where the square is on the 5th, 6th, or 7th rank.",
"sae_25707": "This feature detects a target square on the 7th or 8th rank that is attacked by a black piece, or is a potential target for a white pawn to advance to.",
"sae_25701": "Detects a white pawn on g3/f3/h3 that is not attacked by black pieces, with a white rook on the back rank.",
"sae_25822": "Black king on g8 with no white attackers, and a black rook on f8 or h8.",
"sae_25727": "White's king is castled kingside, and the h1 square is attacked by a white rook on the first rank, with no black attackers.",
"sae_25667": "A white queen or rook attacks a black rook on its back rank, often with other pieces blocking the attack.",
"sae_25718": "A pawn on the second rank is attacked by at least one black piece and defended by at least one white piece, with the white king not on the first rank.",
"sae_25833": "Detects an empty square on the first rank that is attacked by a black rook.",
"sae_25771": "This feature detects a rook on the second rank (from its side) that is not attacked by the opponent and is not attacking any squares.",
"sae_25803": "The feature detects a king on an edge square that is not attacked by the opponent, with at least one friendly queen nearby.",
"sae_25746": "A pawn on f6/f7/g6/g7 that is attacked by a white queen and defended by a black king.",
"sae_25922": "Detects the black king on e8, attacked by multiple black pieces, with no white attackers.",
"sae_25866": "The feature detects a king on the first rank, with the target square being a square on the first rank that is not attacked by white pieces.",
"sae_25928": "Detects a black rook on the 2nd, 6th, or 7th rank, with no white or black attackers on it.",
"sae_25855": "This feature detects a knight on the back rank (a8 or h8) that is attacked by the opponent and defended by the side to move.",
"sae_25848": "The feature detects squares on the c-file (or g5) that are attacked by White and undefended by Black, often with multiple White attackers.",
"sae_25932": "Active king centralised in a pawn or minor-piece endgame, often deciding the outcome through king opposition, zugzwang, or superior activity.",
"sae_25881": "The feature detects a king on the same rank or file as an enemy rook, with the target square being the square between them.",
"sae_25976": "This feature detects a black bishop on the target square, attacked only by black pieces (or not attacked at all).",
"sae_25549": "A pawn on the 4th rank is attacked by at least two enemy pieces and defended by fewer friendly pieces.",
"sae_25959": "Detects a square attacked by more black pieces than white pieces, where white has at least one attacker, often on the kingside.",
"sae_26001": "This feature detects a black bishop on a square that is attacked by white and defended by black, with white having at least one attacker.",
"sae_25953": "The feature detects an undefended empty square on the back rank (or 7th rank for black) that is attacked by at least one enemy piece.",
"sae_25939": "A square on the first rank is attacked by a black rook, with no white attackers.",
"sae_25977": "A minor piece or pawn is overloaded or under-defended on a contested central or passed-pawn square.",
"sae_25943": "Detects an empty square on the back rank (rank 8 for White, rank 1 for Black) that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_25985": "This feature detects a pawn on the 3rd or 4th rank that is under attack by at least two enemy pieces and defended by fewer friendly pieces.",
"sae_25984": "Detects a king on the h-file or g-file, or an empty square on the h-file or g-file that is attacked by white, with the king of the side to move being on the h-file or g-file.",
"sae_26008": "A square attacked by one white piece and one or two black pieces, where the white attacker is a Knight or Rook.",
"sae_26026": "The feature activates when the king is on a square that is attacked by a pawn, and the king is not attacked by any other pieces.",
"sae_26024": "This feature detects a white rook on the 1st or 2nd rank that is attacked by a black piece.",
"sae_25986": "Detects a pawn on a6 or h7 that is attacked by at least two enemy pieces and not attacked by any friendly pieces (or only one friendly piece if the target is a6).",
"sae_26042": "Detects a square on the first two ranks that is attacked by a black piece and not attacked by a white piece, often with a black knight nearby.",
"sae_26069": "A white rook attacks a square on the 7th or 8th rank that is defended by at least one black piece.",
"sae_26017": "This feature detects a black knight on a central square (d3, d4, d5, e5) or on f2/e8, which is attacked by exactly one white piece and attacked by one or two black pieces.",
"sae_26097": "White rook on or near the first rank, uncontested by black pieces, supporting a back-rank defence or providing a quiet reserve in complex middlegames.",
"sae_25974": "This feature detects a rook on its starting square (a1 or h1) that is not attacked by the opponent and is not defended by its own side, often with the king castled or castling.",
"sae_25982": "Detects a black rook on or near its starting square in an endgame, often contesting a back rank or open file against white's attacking pieces.",
"sae_26131": "This feature detects a king on the target square that is not attacked by any pieces, and is often on an open file or rank.",
"sae_26051": "A pawn on the 3rd rank (for white) or 6th rank (for black) that is either undefended or attacked by more enemy pieces than friendly pieces.",
"sae_26146": "The feature detects a black knight on b8, attacked by black pieces, with no white attackers.",
"sae_26117": "This feature detects a white bishop attacking an empty square, often on a long diagonal, with no black attackers on that square.",
"sae_26029": "The feature detects a white piece attacking a black piece on a square that is also attacked by a black piece, with the target square often being a pawn or knight.",
"sae_26102": "A black piece (especially a queen or rook) is undefended and attacked by a white piece.",
"sae_26094": "A square on the 6th or 7th rank that is attacked by at least 3 enemy pieces and not attacked by any friendly pieces.",
"sae_26157": "White rook on the first rank, on the same file as the white king, with no pieces between them, and no black attackers on the rook.",
"sae_26172": "The white king is on the first rank, and the target square is an empty square on the first rank, adjacent to the king, that is not attacked by black pieces.",
"sae_26186": "The feature detects a black bishop on its original square (c8 or f8) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_26104": "White rook or queen attacks a black pawn on the 7th rank, with no black defenders.",
"sae_26073": "The feature detects an empty square on the first rank that is a potential escape square for the king, especially when the king is on the first rank.",
"sae_26225": "Detects an undefended empty square on the back rank (a8 or h8) that is attacked by a black piece, with the white king on the back rank.",
"sae_26196": "The feature detects a white knight fork threat on the king and another piece, where the knight is not currently attacking the king.",
"sae_24614": "A square attacked by multiple black pieces, but only one white piece.",
"sae_26180": "Detects a square attacked by exactly one black piece and zero white pieces, with the attacking black piece being a rook or bishop.",
"sae_24636": "A white queen or rook is attacked by exactly one black piece, and the white piece is undefended.",
"sae_26236": "The feature detects an undefended empty square on the first rank, attacked by a black piece, where the white king is on the same rank and not on the target square.",
"sae_24674": "A square is attacked by black pieces, but not by white pieces, and is on the 3rd or 6th rank.",
"sae_24640": "A black rook on or near the back rank that is loosely placed, often in positions with mating or back-rank tactical motifs.",
"sae_26303": "This feature detects a square that is attacked by exactly one black piece and not attacked by any white pieces.",
"sae_26354": "The feature detects a white knight attacking an empty square, with no black pieces attacking that square.",
"sae_26287": "A white piece (Rook or Queen) is attacked by one black piece and defended by one white piece, with the white piece being on the target square.",
"sae_26244": "This feature detects a square that is a potential escape square for the king, but is currently blocked by a friendly pawn.",
"sae_26341": "This feature detects a white pawn on the 3rd or 4th rank that is attacked by at least one white piece and at most one black piece.",
"sae_26259": "A pawn on the 7th rank (g7, h7, or f7) is attacked by one white piece and defended by one black piece.",
"sae_26315": "This feature detects a piece (often a Knight or Bishop) on a central square (d3, e4, e5, f4, b5) that is attacked by the side to move, and not attacked by the opponent.",
"sae_24666": "Detects a target square on the 8th rank that is undefended by the side to move and is attacked by at least one enemy piece.",
"sae_26367": "An undefended empty square under sole black control, likely relevant to tactical threats or infiltration.",
"sae_26376": "Detects a king on the 7th or 8th rank, with the target square being the 8th rank, and no enemy pieces attacking the target square.",
"sae_24751": "White knight in a safe, uncontested position typically near its starting square, defended by at least one white piece.",
"sae_26389": "Detects a white rook attacking a square on the 7th or 8th rank, especially when the square is empty or occupied by a black queen.",
"sae_26506": "A queen (either colour) on an undefended square attacked by two or more enemy pieces, typically in a middlegame mating or tactical sequence.",
"sae_24735": "A pawn on the 2nd or 3rd rank that is undefended and attacked by an enemy piece, or a square on the 2nd or 3rd rank that is undefended and attacked by an enemy piece.",
"sae_26406": "King under mating pressure, typically in a back-rank or anastasia mate pattern, with an attacking piece nearby and limited escape squares.",
"sae_26446": "The feature detects a pawn on the 2nd or 3rd rank (for white, 7th or 6th for black) that is attacked by an enemy piece and defended by at least one friendly piece.",
"sae_26417": "A central square (d4/e4/d5/e5) is attacked by at least 3 enemy pieces and defended by fewer than 3 friendly pieces.",
"sae_26442": "Detects a black knight on a central square (d5, b4, c6, f6) that is attacked by one white piece and defended by at least two black pieces.",
"sae_26567": "This feature detects a queen attacking a square, especially when it's the only attacker and the square is near the opponent's king.",
"sae_26529": "Knight on an exposed square that serves as a focal point for a tactical sequence, regardless of exact attacker balance.",
"sae_26551": "Black controls b8 or c8, with at least one black knight attacking the square, and no white pieces attacking it.",
"sae_26510": "This feature detects a pawn on the 6th rank (for White) or 3rd rank (for Black) that is either passed or has no opposing pawns on adjacent files.",
"sae_26536": "An active white knight on an advanced or central square (e5, d6, f6), typically participating in a mating attack or fork threat.",
"sae_26574": "A white rook on the 6th, 7th, or 8th rank, with no pieces between it and the opponent's king, and no attackers on the rook.",
"sae_26555": "This feature detects a king's potential escape square on the first rank, especially when it is the only available square or is protected by a friendly piece.",
"sae_26569": "A square on the back rank or 7th rank (for white) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_26557": "This feature detects a black rook on a central square (c5, f5, f6, a5) that is either undefended or attacked by an equal or greater number of white pieces.",
"sae_26588": "This feature detects a white piece attacking a black piece on the back rank (7th or 8th rank from white's perspective).",
"sae_26576": "A pawn on the 2nd or 3rd rank of the side to move, which is attacked by an enemy piece and undefended.",
"sae_26628": "The feature detects a white piece on a square that is attacked by both white and black, with white having at least one attacker.",
"sae_26592": "Detects a pawn on the 7th rank that is not attacked by the opponent and is not defended by the side to move.",
"sae_26641": "This feature detects a white bishop or rook that is attacked by one black piece and defended by at least one white piece, where the target square is on the first three ranks.",
"sae_25534": "This feature detects a black rook on the back rank that is attacked by at least 2 black pieces and 0 white pieces.",
"sae_26667": "This feature detects a square on the 6th rank (for White) or 3rd rank (for Black) that is attacked by two of the opponent's pieces and defended by two of the player's pieces, with the target square being empty.",
"sae_26678": "A white piece attacks a square that is undefended by black, and the square is on the 6th or 7th rank.",
"sae_26658": "Detects a black rook on the back rank (7th or 8th) that is attacked by at most one white piece.",
"sae_26694": "A square is attacked by multiple black pieces, but not by white pieces, and is a potential target for a white piece to move to.",
"sae_26721": "White's rook on the first rank is attacked by a black rook or queen, with the target square being the rook's original square.",
"sae_26775": "White's king is castled kingside, and the target square (c1, d1, or e1) is an empty square on the first rank, attacked by at least 3 white pieces and 0 black pieces.",
"sae_26755": "A white knight on f3, attacked by zero black pieces, and defended by exactly two white pieces.",
"sae_26715": "The feature detects a square attacked by a single black piece, which is also adjacent to the white king.",
"sae_26751": "This feature detects a Queen on its starting square (d1 for White, d8 for Black) or on a square where it has just moved from its starting square, with no immediate threats.",
"sae_26809": "Squares vulnerable to enemy pawn attack with insufficient local defence.",
"sae_26790": "This feature detects a white pawn on the 4th or 5th rank that is attacked by at least one white piece and not attacked by any black pieces.",
"sae_25027": "White's queen or bishop attacks g7, which is occupied by a black pawn and defended by a black bishop.",
"sae_26784": "A White Rook on the 6th or 7th rank, attacked by Black, with no White attackers (or only one if Black has two).",
"sae_26835": "Detects a bishop on the long diagonal (a1-h8 or a8-h1) attacking a square on the same diagonal, with no other pieces on the diagonal between the bishop and the target square.",
"sae_26869": "This feature detects a black rook on its back rank (rank 8) that is not attacked by white pieces.",
"sae_26811": "This feature detects a white rook attacking an empty square on the first rank, especially a1, with no black attackers.",
"sae_26887": "The feature detects a central square (d5 or c5) that is attacked by at least two white pieces and has a favorable white attacker-to-defender ratio (at least 2:1 or 3:2).",
"sae_26872": "The feature detects an empty square on the first rank (f1 or d1) that is heavily attacked by white pieces and not attacked by any black pieces.",
"sae_26822": "This feature detects a white knight that is attacked by zero black pieces and is attacked by at least one white piece.",
"sae_26883": "This feature detects a square that is attacked by an equal number of white and black pieces, often with a white bishop or knight involved in the attack.",
"sae_26894": "This feature detects a pawn on the 7th rank (f7, g7, or h7) that is attacked by exactly one black piece and not attacked by any white pieces.",
"sae_26930": "A white piece attacks a black knight on a central square (d3, d2, c4, e4, g4) that is not attacked by any black pieces.",
"sae_26921": "polysemantic",
"sae_26858": "The feature detects a pawn on the 2nd rank (a2 or h2) that is attacked by at least one friendly piece and not attacked by any enemy pieces, with the target square being the 3rd rank (a3 or h3) directly in front of the pawn.",
"sae_25332": "White's Queen attacks the h7 pawn, which is defended by a Black piece, often a Bishop on f8 or g8.",
"sae_26934": "A pawn on the 2nd or 3rd rank that is undefended by its own side and attacked by an enemy piece, or undefended by either side.",
"sae_26944": "A white knight on the 3rd rank is attacked by at least two white pieces and at most one black piece.",
"sae_25265": "Detects a square attacked by the opponent, where the side to move can increase their attack count to equal or exceed the opponent's attack count.",
"sae_26896": "A square is attacked by one white piece and one black piece, with the white piece being a Queen or Bishop.",
"sae_26943": "White king is on the 7th or 8th rank, and the target square is an empty square on the 8th rank.",
"sae_25313": "A square on the 4th, 5th, 6th, 7th, or 8th rank that is attacked by 0 white pieces and 0 black pieces.",
"sae_26951": "The feature detects a black rook on its starting square (a8 or c8) that is undefended by black pieces and not attacked by white pieces.",
"sae_26960": "King actively centralised or advanced in an endgame with passed pawn pressure.",
"sae_26945": "The feature detects a pawn on the 4th or 5th rank that is attacked by the opponent and defended by the side to move, with the side to move having at least one more attacker than the opponent.",
"sae_26959": "This feature activates for squares on the 7th rank (for white) or 2nd rank (for black) that are undefended by the side to move and heavily attacked by the opponent.",
"sae_27002": "The feature detects an empty square on the 7th or 8th rank that is adjacent to the enemy king and is not attacked by either side.",
"sae_27004": "A white rook attacks a square that is defended by at least two black pieces, with the white king nearby.",
"sae_27018": "The feature detects a square attacked by at least one black piece, but not by any white pieces, where the target square is on the 6th rank.",
"sae_27039": "This feature detects a black rook on the 7th or 8th rank, with no white attackers, and often with the white king nearby.",
"sae_27133": "The feature detects a king on the edge of the board, with a friendly rook or queen on the same rank or file, and no immediate attackers on the king.",
"sae_25529": "A pawn on the 2nd, 3rd, or 4th rank that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_27022": "A square on the 6th or 7th rank is attacked by at least one black piece, and not attacked by any white pieces.",
"sae_27052": "This feature detects a pawn on the 7th rank (for white) or 2nd rank (for black) that is not attacked, with the king on the same rank or an adjacent rank, and the target square being a square on the 8th rank (for white) or 1st rank (for black) that is not attacked.",
"sae_27030": "This feature detects an enemy pawn that is attacked by at least one enemy piece and not attacked by any friendly pieces.",
"sae_27130": "Detects an undefended empty square that is attacked by one white piece, often a pawn, and sometimes also attacked by black pieces.",
"sae_25558": "Detects a bishop on a light square, often on the a6-f1 or h3-c8 diagonals, with no immediate threats or captures.",
"sae_27182": "A white rook attacks a black rook on the back rank, with the black rook being attacked by at least one other black piece.",
"sae_27150": "A square on the 6th rank is attacked by at least one black piece, and white has 0 or 1 attackers on it.",
"sae_27161": "This feature detects a pawn on the second rank that is attacked by at least one enemy piece.",
"sae_27186": "Detects a king on the back rank, with a knight and bishop nearby, and the target square is the corner of that back rank.",
"sae_27198": "An undefended square attacked by an enemy piece, often a pawn or knight, on the 2nd or 3rd rank, especially on the kingside.",
"sae_25649": "Detects a black piece (pawn, bishop, or king) on the 6th or 7th rank that is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_27148": "Detects a black bishop on a dark square, often on the 4th, 5th, or 7th rank, that is currently undefended by white pieces.",
"sae_27071": "The feature detects a target square that is currently empty, not attacked by either side, and is on the 6th or 7th rank, often near the opponent's king.",
"sae_27206": "Detects a black queen on the target square, attacked by at least one black piece, and not attacked by any white pieces.",
"sae_27240": "Detects a square on the back rank (7th or 8th) that is attacked by at least two black pieces and is either undefended or defended by only one white piece.",
"sae_27259": "This feature detects a black pawn on the 5th or 6th rank that is attacked by white and defended by black.",
"sae_27246": "This feature detects a target square on the back rank that is attacked by a black knight or bishop, with the white king nearby.",
"sae_27265": "The feature detects a king on the back rank, with a pawn on the 7th rank and a knight on the 6th rank, creating a potential back rank mate threat.",
"sae_27281": "This feature detects a white rook on its starting square (a1, c1, d1, f1) or a white knight on f3, which is defended by at least two white pieces and attacked by at most one black piece.",
"sae_27242": "Detects empty squares on the back rank or 7th rank that are attacked by a black rook and are potential targets for a white rook to deliver checkmate or gain material.",
"sae_27319": "This feature detects squares that are attacked by at least one white piece and are either undefended or defended by fewer black pieces than white pieces.",
"sae_27276": "This feature detects a square attacked by a white pawn, often on the 3rd or 4th rank, where the pawn is either undefended or defended by another white piece.",
"sae_27285": "This feature detects a black bishop on g7 or e7, attacked only by black pieces, with a white bishop on the a2-g8 or a1-h8 diagonal.",
"sae_27312": "Detects a bishop on a corner square (a1, h1, a8, h8) or a square adjacent to a corner (a2, b1, g1, h2, a7, b8, g8, h7).",
"sae_27325": "This feature detects a white piece attacking a square that is not attacked by any black piece, with the white king being relatively safe.",
"sae_27333": "White pawn promotion to the 8th rank, especially when the king is nearby or the pawn is protected.",
"sae_27346": "This feature detects a King on the a-file, especially on a1, with no attackers from either side, often in an endgame scenario.",
"sae_27324": "Detects a white pawn on the 2nd rank (b2 or h2) that is attacked by white pieces and not attacked by black pieces, often with a white King nearby.",
"sae_27331": "The feature detects a black rook on its starting square (a8 or f8) that is not attacked by white pieces.",
"sae_27360": "White's queen or knight can attack g7, which is defended only by a black pawn.",
"sae_27352": "A white pawn on d4 or e4 is attacked by at least two black pieces and defended by at least one white piece.",
"sae_27366": "A white knight attacking a black piece (often a knight) on a central or kingside square, with no immediate black defenders.",
"sae_27367": "White's queen or rook attacks a black bishop on the 4th, 5th, or 6th rank, with the bishop being attacked by at least two black pieces.",
"sae_27398": "The feature detects a target square on the 7th or 8th rank that is attacked by no pieces, and is near the enemy king.",
"sae_27415": "Detects a king on the 8th rank, with a rook on the same rank, and a pawn on the 7th rank, creating a back-rank mate threat.",
"sae_27363": "Detects a square that is undefended by the opponent and is a potential target for a queen or rook, often on an open file/rank or near the opponent's king.",
"sae_27407": "Detects an empty square on the 2nd or 3rd rank that is attacked by white and not attacked by black, often a pawn push.",
"sae_27457": "This feature detects a black bishop on a square attacked by exactly one white rook, where the bishop is also attacked by at least one black piece.",
"sae_27496": "A rook on the 1st or 2nd rank, defending a pawn on the same rank, with the king on the 1st rank.",
"sae_27475": "This feature detects an undefended square on the 2nd or 3rd rank, attacked by at least two white pieces, often a pawn and a queen/rook, with the target square being empty.",
"sae_27509": "This feature detects an empty square on the back rank (or second rank for white) that is attacked by at least two white pieces and zero black pieces, often with a white rook or queen on the same rank/file.",
"sae_27497": "Detects a queen on the same rank or file as the king, with no pieces in between, creating a discovered attack opportunity if the queen moves.",
"sae_27550": "Detects a central square (c4, d4, e4) that is attacked by two black pieces and defended by one or two white pieces, often with a white pawn on the target square.",
"sae_27508": "Detects an undefended square attacked by a single black queen, rook, or bishop, often near the white king.",
"sae_27587": "This feature detects a white knight on f3 or c3, attacked by at least one white piece and no black pieces.",
"sae_27455": "The feature detects a square on the back rank or second rank that is attacked by one white piece and one black piece, with white having a queen or rook that can move to that square.",
"sae_27563": "This feature detects a king on the back rank, with a queen or rook on the same rank, and the target square is an empty square on the same rank as the king and queen/rook, but on the opposite side of the board.",
"sae_27068": "White's king is castled or about to castle, and the target square is the king's original square, which is empty and attacked by white rooks.",
"sae_27529": "Detects a rook on the a-file that can move to a target square on the a-file, with the target square being undefended by white and potentially attacked by black.",
"sae_26052": "King actively centralised or advancing toward a critical square in a simplified endgame.",
"sae_27637": "The feature detects an empty square on the 2nd rank, attacked by at least 2 white pieces and no black pieces, often in the center or kingside.",
"sae_26185": "A square is attacked by at least one black piece, but not by any white pieces.",
"sae_27640": "This feature detects a square attacked by exactly one white piece and exactly one black piece, where the white attacker is a Queen.",
"sae_27606": "Detects a king on the 8th rank, with the target square being an empty square on the 8th rank, and no pieces on the 7th rank directly in front of the king.",
"sae_27643": "This feature detects a white rook attacking a back rank square that is empty and undefended by black.",
"sae_27633": "The feature detects a pawn on the 4th or 5th rank that is attacked by one white piece and one or more black pieces, where white has a single attacker.",
"sae_26227": "Detects a pawn on f7, e7, or g7 (king-side pawns) that is attacked by at least two black pieces and defended by zero white pieces.",
"sae_27655": "A queen is actively contested \u2014 under threat from an enemy piece and relying on a single defender, creating tactical tension.",
"sae_26187": "A king-side pawn push target square (f2, g1, h2, e2) that is attacked by one white piece and one black piece, with the king often nearby.",
"sae_27620": "Detects a square on the 4th rank (b4 or g4) that is attacked by at least one black piece, and potentially defended by a white piece.",
"sae_27650": "The feature detects a white pawn on d4 or e5, attacked by at least one black piece, and defended by at least two white pieces.",
"sae_27662": "This feature detects a king on the back rank (or 7th rank for black) that is under attack by a queen, where the king is not directly attacked by other pieces.",
"sae_27701": "The feature detects a black pawn on the 6th or 7th rank, undefended by white pieces, and often undefended by black pieces.",
"sae_26229": "Detects a black pawn on g7 or h7 that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_27680": "The feature detects an empty square on the a8/b8 square, which is attacked by at least one black piece, and not attacked by any white pieces.",
"sae_27710": "This feature detects squares that are attacked by white and are on the same rank or file as the black king, especially if the square is empty and attacked by a white rook or queen.",
"sae_27690": "A white pawn is attacked by one black piece and defended by at least two white pieces, or a white pawn is attacked by zero black pieces and defended by at least one white piece.",
"sae_27762": "White King near a corner square (a1, h1, a2, h2) in an endgame or mating-net position.",
"sae_26283": "A white knight on c3, d5, or g5 that is attacked by at least one black piece.",
"sae_27679": "White rook on a1 or h1 in an uncastled middlegame position with an exposed king.",
"sae_27747": "A queen is attacked by at least one enemy piece on the first rank, with no friendly attackers.",
"sae_27751": "This feature detects a white bishop on the 3rd or 5th rank that is attacked by at least one white piece and not attacked by any black pieces.",
"sae_27744": "Detects a king on the back rank (7th or 8th) that is not attacked by the side to move, often with a queen or rook nearby.",
"sae_26298": "Bishop activity in tactical or endgame positions where a bishop is a key attacking or deflection piece.",
"sae_26325": "A square is attacked by at least one black piece, and not attacked by any white pieces.",
"sae_27766": "This feature detects a square that is attacked by white and overprotected by black, with white having fewer attackers than black.",
"sae_27783": "This feature detects a black queen on the first rank, especially when it is undefended and on the a or b file.",
"sae_27771": "A square is attacked by one white piece and one black piece, with the white piece being a rook or queen.",
"sae_26468": "A white pawn on the 3rd rank (c3, d3, e3) or 2nd rank (c2) that is attacked only by white pieces.",
"sae_27815": "The feature detects a square attacked by a white piece, which is also attacked by multiple black pieces, often a pawn.",
"sae_27790": "The feature activates when a white pawn is attacked by two black pieces and defended by one white piece, or when a black piece is attacked by two black pieces and defended by one white piece, on a square that is not a pawn.",
"sae_27808": "The feature detects a pawn on the 6th or 7th rank that is attacked by the side to move, often with a queen or bishop, and defended by the opponent.",
"sae_27836": "White rook on its starting square (a1 or h1) with no white attackers and no black attackers.",
"sae_27763": "A white rook attacks a square on the 7th or 8th rank, with no black pieces attacking that square.",
"sae_27847": "The feature detects squares attacked by a black knight, especially when the square is empty and not attacked by white.",
"sae_26523": "Detects a black pawn on the 7th rank that is not attacked by white pieces, often with a white rook on the same file.",
"sae_27807": "This feature detects a back-rank mate threat where the king is on the back rank, has no escape squares, and is attacked by a rook or queen.",
"sae_27843": "A white knight is on the same rank or file as the white king, with no pieces between them, and the knight is not attacked by black pieces.",
"sae_26527": "A white pawn on the 6th or 7th rank is attacked by a white piece and not attacked by a black piece.",
"sae_27867": "A white piece (often a pawn) is attacked by a black piece on the 2nd rank, and white has at least one defender.",
"sae_27859": "Detects a king-side back rank square (f8, g8, h8) that is undefended by White and attacked by at least two Black pieces, often including a queen or rook.",
"sae_27871": "This feature detects a white queen on a square where it is not attacked by black pieces, and where it is the only white piece attacking that square.",
"sae_27853": "White bishop actively placed on an open diagonal in a tactical mating position, often supporting a discovered check or promotion threat.",
"sae_27890": "Detects an empty square on the back rank (a7, a8, b8, e8, f8) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_27947": "The feature detects a square attacked by one white piece and multiple black pieces, where white can capture a black piece on that square.",
"sae_27893": "The feature detects a black pawn on the 7th rank that is attacked by at least two black pieces and zero or one white pieces.",
"sae_27952": "The feature detects a black pawn on the 5th or 6th rank that is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_27905": "This feature detects a King on the back rank, with no pieces directly in front of it, and a friendly Rook on the same rank.",
"sae_27874": "Hook mate pattern: rook-and-knight cooperation delivering mate to a cornered king, with a passed pawn or key square restriction involved.",
"sae_28009": "An undefended back-rank square (or 7th rank for black) that is heavily attacked by the opponent.",
"sae_28005": "The feature detects an empty square on the first rank, attacked by a black rook, where the white king is nearby and potentially vulnerable.",
"sae_27937": "The feature detects a king on g7 or h7 that is not attacked by the side to move, with the side to move having a queen on a nearby square (e.g., d1-h5 diagonal, a1-h8 diagonal, or adjacent file/rank).",
"sae_28011": "This feature detects a square that is attacked by two white pieces and one black piece, where one of the white attackers is a pawn.",
"sae_27955": "This feature detects a rook on the first rank, especially in the corner, that is not attacked by the opponent and not defended by its own side.",
"sae_28065": "This feature detects a black bishop on a square that is not attacked by white pieces.",
"sae_28014": "The feature activates when the king is on a corner square (a1, a8, h1, h8) and is not attacked by the opponent.",
"sae_28035": "White rook attacking a black rook or queen on the back rank, with no black attackers on the target square.",
"sae_27977": "This feature detects a square attacked by at least one black piece, where a white pawn can move to attack that square.",
"sae_28019": "The feature detects a black pawn on the 5th or 6th rank that is either undefended or defended by only one black piece, and is not attacked by white.",
"sae_28043": "The feature detects a black-controlled, undefended square on the 7th or 8th rank, often c7, that is a potential target for a white queen or knight.",
"sae_28054": "This feature detects a black queen or rook on the first rank, with no white attackers, often near the white king.",
"sae_28012": "White rook in a dominant or active position, not under immediate attack by Black pieces.",
"sae_26626": "A white piece is attacking a square that is also attacked by a black piece, and the square is on the 7th rank (for white) or 2nd rank (for black), and the square is empty.",
"sae_28117": "A black rook attacking an empty square on the first or eighth rank, with no white attackers on that square.",
"sae_26610": "A white queen attacking a square on the 7th or 8th rank that is defended by exactly one black piece, often a king or pawn.",
"sae_28087": "The feature detects a pawn on f2 or g2 that is attacked by an enemy piece, with the pawn being defended by at least one friendly piece.",
"sae_26669": "A black piece controlling a square adjacent to the white king, typically in an endgame mating pattern.",
"sae_26623": "Detects a black bishop on a square that is attacked by at least one black piece and zero white pieces.",
"sae_28121": "Black king on e8 is attacked by at least two black pieces, with no white attackers.",
"sae_28176": "A king in a vulnerable position, typically on or near the back rank, with limited defensive resources and exposed to a mating threat.",
"sae_27110": "This feature detects a white pawn on the 5th or 6th rank that is attacked by at least one black piece and defended by at least one white piece.",
"sae_28172": "Detects a black bishop on its original square (c8, d7, f8) on the back rank, attacked by at least two black pieces, with no white attackers.",
"sae_28135": "This feature detects a white piece (excluding pawns) attacking a square on the first or second rank, especially when the square is empty or occupied by a white pawn, and the white king is nearby.",
"sae_28196": "A critical passed pawn or promotion threat in a complex endgame, often with king and minor piece activity.",
"sae_28082": "The feature detects a pawn on the 5th rank, with the target square being the square directly in front of it on the 6th rank, which is empty and not attacked by the opponent.",
"sae_28203": "A square on the 5th or 6th rank is attacked by at least one black piece and not attacked by any white pieces.",
"sae_28218": "A square is attacked by Black and either undefended or defended by fewer White pieces than Black attackers.",
"sae_28251": "A white knight attacks a square on the 6th or 7th rank, which is either undefended or defended by one black piece.",
"sae_28192": "The feature detects a pawn on the 5th or 6th rank that is attacked by the side to move and defended by the opponent, with the side to move having at least as many attackers as the opponent has defenders.",
"sae_28130": "Detects a black bishop or knight on a central square (d4, d5, e4, e5) or a square adjacent to the center (c4, c5, c6, d6, e6, f4, f5, f6) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_28253": "A square on the 2nd or 3rd rank is attacked by at least 3 white pieces and 0 black pieces.",
"sae_26725": "Detects a black king on e8, with the f8 square being attacked by multiple black pieces and no white pieces.",
"sae_26738": "An undefended square on the 7th rank (or 2nd rank for Black) that is attacked by at least one enemy piece.",
"sae_28215": "This feature detects squares attacked by at least two enemy pieces, with the target square being empty or occupied by a friendly piece, and the side to move is the one whose pieces are being attacked.",
"sae_28260": "This feature detects pawns on the 3rd or 4th rank that are either isolated or part of a pawn chain, often with a king nearby.",
"sae_28305": "Black queen on an active square participating in a mating sequence, with no immediate white counterattack.",
"sae_28250": "Detects a pawn on the 5th or 6th rank that is not attacked by the side to move and is not defended by the opponent.",
"sae_26778": "A white bishop on the 2nd or 4th rank, on the c or g file, with no black attackers.",
"sae_28269": "The feature detects a weak square on the 6th or 7th rank (for white) that is attacked by multiple black pieces and undefended by white.",
"sae_28304": "White bishop or queen attacking a king on the back rank, with the king having no escape squares.",
"sae_28259": "Black king on e8, attacked by at least two black pieces, with no white attackers.",
"sae_28296": "This feature detects squares that are attacked by at least one black piece and are either undefended by white or defended by fewer white pieces than black pieces.",
"sae_28325": "Detects a white piece attacking a black piece on the 5th or 6th rank, where the black piece is either a knight or a bishop, and the white piece is the sole attacker.",
"sae_28320": "Detects a square attacked by a black piece, where white has no direct attack, and the square is not occupied by a piece.",
"sae_28224": "A black piece on the 5th, 6th, 7th, or 8th rank is attacked by one white piece and defended by one black piece.",
"sae_28329": "Detects a black rook on an open file or semi-open file (no pawns of its own color) that is not attacked by white pieces.",
"sae_28356": "A white bishop attacking an empty square, with no black attackers on that square, and the white king is nearby.",
"sae_28364": "A knight (either colour) that is actively supported by a friendly piece, with or without white pressure.",
"sae_28354": "White Queen attacks an empty square on the back rank, which is not attacked by any black pieces.",
"sae_26743": "A black minor piece (bishop or knight) on the 6th or 7th rank with no white attackers.",
"sae_28378": "This feature detects an empty square on the 6th or 7th rank that is attacked by White and not defended by Black.",
"sae_28348": "A white piece attacks an empty square, which is either undefended by black or defended by fewer black pieces than white pieces.",
"sae_28389": "The feature detects a king on the 6th, 7th, or 8th rank that is attacked by a single enemy pawn, with no friendly pieces defending the king.",
"sae_28357": "This feature detects a white knight on a central or semi-central square (b3, c3, d5, e3, b5, g5) that is attacked by at least one black piece and defended by at least one white piece.",
"sae_28422": "A white knight on f3, attacked once by black and defended twice by white, often with a white pawn on e4 or d4.",
"sae_28464": "White bishop on g2, defended by a white piece, with no black attackers.",
"sae_28463": "This feature detects a backward pawn on the 6th or 7th rank, which is a target for the side to move.",
"sae_28492": "Detects a square attacked by exactly one black piece, with no white attackers, and the square is empty.",
"sae_28415": "The feature detects squares that are attacked by at least one black piece and are either undefended by white or defended by fewer white pieces than black pieces.",
"sae_28471": "Black rook on an active central or kingside file (d8\u2013h8 range), not necessarily on its starting square.",
"sae_28453": "A square where white holds a local attacking advantage \u2014 fork target, hanging piece, or key mating square \u2014 with minimal black resistance.",
"sae_28483": "This feature detects a black pawn on the 6th rank that is attacked by at least one black piece and is not attacked by any white pieces.",
"sae_28442": "A white rook attacks a black piece on the 6th or 7th rank, with the black piece being undefended or defended by only one piece.",
"sae_28539": "A square is attacked by one white piece and at least two black pieces, with the target square being empty.",
"sae_28555": "White pawn on the 7th rank, with a black king on the 8th rank, and the target square is on the 8th rank.",
"sae_28562": "Detects an active king in an endgame, often engaged in king opposition or zugzwang scenarios, with adjacent tension from enemy pieces.",
"sae_28578": "Detects a target square on the kingside that is attacked by at least one black piece and is either undefended or defended by at most one white piece.",
"sae_28497": "Pawn endgame with kings centrally placed and passed pawns on both flanks, creating a race to promote.",
"sae_28620": "This feature detects a white knight on f3 that is attacked by one black piece and defended by two or more white pieces.",
"sae_28597": "This feature detects a square on the 5th or 6th rank that is attacked by a black pawn and either undefended or defended by a white pawn.",
"sae_28510": "The feature detects a pawn on the 2nd rank (for White) or 7th rank (for Black) that is attacked by an enemy piece and undefended.",
"sae_28518": "Detects an empty square on the 7th or 8th rank that is undefended by Black and could be occupied by a White rook.",
"sae_28656": "The King is on the back rank, not attacked, and has no friendly pieces on the squares immediately in front of it.",
"sae_28576": "A rook on the 7th rank (or 2nd for Black) attacking an empty square on the back rank, with the enemy king nearby.",
"sae_28595": "This feature detects a knight on the 6th rank (c6 or f6) that is attacked by one white piece and one black piece.",
"sae_28557": "The feature detects a pawn on the 7th rank that is not attacked by the opposing side, with the king of the same color as the pawn nearby.",
"sae_28574": "The feature detects a white pawn on h2, attacked by at least one white piece, and either not attacked by black or attacked by one black piece.",
"sae_28665": "A white knight that is actively placed in a tactical position, often on an outpost or advanced square, in middlegame or mating-net positions.",
"sae_28671": "The feature detects an undefended back rank square (c8, d8, or e8) that is heavily attacked by black pieces, creating a back-rank mate threat for white.",
"sae_28662": "This feature detects a white knight that is attacked by no black pieces and attacked by at least one white piece, with a preference for knights on the 2nd, 3rd, or 5th rank.",
"sae_26873": "Detects an empty square on the 2nd or 3rd rank, attacked by at least 2 white pieces and 0 black pieces, often a pawn push or a square for a piece to move to.",
"sae_28524": "Detects a rook on the back rank, attacking an empty square on the back rank, with no enemy pieces attacking that square.",
"sae_28514": "A white knight is on the 3rd rank, attacked by at least one white piece, and not attacked by any black pieces.",
"sae_27151": "This feature detects a king on an edge square (a or h file, or 1st or 8th rank) that is not attacked by any piece.",
"sae_27192": "Detects a square attacked by a black queen, where the square is not attacked by any white pieces.",
"sae_28702": "A black bishop or knight on the 5th or 6th rank, attacked by zero white pieces.",
"sae_28710": "A white queen attacks an empty square on the 7th or 8th rank, which is not attacked by any black pieces.",
"sae_28685": "A pawn on the 3rd rank (for white) or 6th rank (for black) that is attacked by an enemy piece and defended by at least one friendly piece.",
"sae_28706": "This feature detects a bishop on a central square (c4, c5, d4, b5) or a rook on the back rank (e1, f1) that is attacked by one black piece and defended by one or two white pieces.",
"sae_28699": "A white piece (especially a Queen or Rook) attacks a square on the back rank or 7th rank, which is not attacked by a black piece, and is near the black king.",
"sae_28783": "A square is attacked by one enemy piece and either undefended or defended by one friendly piece.",
"sae_28802": "A queen is attacked by one black piece and defended by at most one white piece.",
"sae_28779": "A pawn on the 3rd or 4th rank (from its side) that is attacked by at least one enemy piece and defended by at least one friendly piece, with the target square being a pawn or empty.",
"sae_28792": "[polysemantic \u2014 fires on multiple unrelated patterns; needs split]",
"sae_28811": "A square on the first three ranks is attacked by at least three white pieces and no black pieces, and the square is empty.",
"sae_28830": "This feature detects a pawn on the 3rd rank (for white) or 6th rank (for black) that is undefended and has no opposing attackers.",
"sae_28797": "A square is attacked by the side to move, with no enemy attackers, and is on the 5th or 6th rank.",
"sae_28741": "A white pawn on d2 or f2 is attacking e3, which is empty and not attacked by black.",
"sae_28695": "A square on the 2nd rank that is attacked by a black queen.",
"sae_28842": "A white piece (P, B, N) is attacked by white pieces and not attacked or attacked by fewer black pieces, on a central square (d, e, f files, 3rd, 4th, 5th ranks).",
"sae_28896": "A white knight on a central square (d4, c3, b5) or on the edge (g5, a4) that is attacked by one black piece and defended by at least one white piece.",
"sae_28883": "The feature detects a square on the 4th, 5th, or 6th rank that is attacked by exactly one black piece and not attacked by any white pieces.",
"sae_28911": "Black's king-side castling square (f8 or d8) is empty and heavily attacked by black pieces, with no white attackers.",
"sae_28949": "Detects an empty square on the first rank that is attacked by the opponent and not defended by the side to move.",
"sae_28947": "A white pawn is attacked by two black pieces and defended by one white piece, with the target square being empty.",
"sae_28964": "White pawn on the 3rd rank that is defended by at least one white piece.",
"sae_28744": "The feature detects a pawn on the 7th rank (or 2nd rank for Black) that is not attacked by the opponent and is a potential target for a pawn push or capture.",
"sae_28958": "The feature activates when a king is on the back rank, and the target square is an empty square on the back rank, adjacent to the king, and not attacked by the opponent.",
"sae_28977": "The feature detects an empty square on the 8th rank that is attacked by a white rook and is a potential escape square for the black king.",
"sae_29074": "A white king is attacked by a black queen, and the target square is a safe square for the king to move to.",
"sae_28963": "Detects an empty square attacked by at least two white pieces and zero black pieces.",
"sae_29001": "The feature detects an undefended empty square on g4 or g6 that is attacked by at least two black pieces.",
"sae_28936": "A square is attacked by two black pieces and one white piece, with the target square being empty.",
"sae_29061": "White rook attacks a black pawn on the 7th rank, which is also attacked by a black piece.",
"sae_29111": "Detects squares on the back rank that are not attacked by the side to move, often for king safety or rook movement.",
"sae_29136": "White pawn on 7th rank, target square is the 8th rank, and the white king is on the 5th or 6th rank.",
"sae_29102": "Black king trapped or restricted on the back rank, vulnerable to a discovered attack, pin, or back-rank mate threat from white.",
"sae_29034": "A black rook is attacked by at least one black piece and no white pieces, on the 6th, 7th, or 8th rank.",
"sae_29047": "A castled or home-square king under pressure from enemy pieces in a middlegame or endgame attack.",
"sae_29076": "The feature detects an empty square on the back rank (rank 8 for white, rank 1 for black) that is heavily attacked by the opponent and undefended by the side to move.",
"sae_29043": "White has a rook on the a or b file, and is attacking a piece on that same file, with at least one other white piece also attacking the target.",
"sae_29112": "Detects a square that is attacked by at least two white pieces and zero or one black pieces, with the target square being empty.",
"sae_29114": "Detects a king on the back rank, with the target square being a back-rank square that is not attacked by the opponent.",
"sae_29099": "A white piece attacks a black piece on a square where the black piece is undefended.",
"sae_29207": "A square is attacked by exactly one white piece and exactly one black piece, with the white king nearby and the black king further away.",
"sae_29165": "Detects a pawn on the 2nd or 3rd rank that is attacked by an enemy piece and not defended by a friendly piece.",
"sae_29206": "Black Queen on d8, attacked by at least two black pieces, with no white attackers.",
"sae_29197": "A square is attacked by multiple black pieces and not attacked by white pieces.",
"sae_29141": "A square is attacked by exactly one white piece (a rook) and exactly one black piece (a king), with the white king nearby.",
"sae_29158": "Detects empty squares on the 7th or 8th rank that are undefended by either side, often near the opponent's king.",
"sae_29007": "A rook attacks an undefended enemy piece on the 7th or 8th rank (either side).",
"sae_29175": "White king on its starting square (e1 or f1) with at least two white pieces defending it and no black attackers.",
"sae_29174": "The feature detects a king being attacked by a pawn, where the king is on the same rank or file as the pawn, and the pawn is one square away from the king.",
"sae_29121": "A white knight on the 2nd or 3rd rank, attacked by at least two white pieces and zero black pieces.",
"sae_29214": "A square is attacked by exactly one black piece and not attacked by any white piece.",
"sae_29218": "A pawn on the 3rd or 4th rank is attacked by one white piece and one black piece.",
"sae_29139": "A white bishop on a square attacked by one black piece and defended by one or two white pieces.",
"sae_29228": "White's rook on the first rank is attacked by one black piece and defended by at least one white piece.",
"sae_29222": "This feature detects a pawn on the 7th rank, one square away from a corner square, with the king on the 6th rank, two squares away from the corner square, and the target square being the corner square.",
"sae_29275": "White King on g1, attacked by 0 black pieces, and defended by 1 or 2 white pieces.",
"sae_29285": "A white knight on c3 or f3, attacked by 0 black pieces and 1 or 2 white pieces.",
"sae_29251": "White attacks a black pawn on the 4th, 5th, 6th, or 7th rank, which is also defended by a black piece.",
"sae_29290": "The feature detects a black rook on its starting rank (1st or 8th from white's perspective) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_29278": "A square on the 7th rank (or 2nd rank for Black) that is undefended by the opponent and attacked by no pieces.",
"sae_29303": "The feature detects a pawn on the 2nd or 7th rank that is attacked by a friendly piece and not attacked by an enemy piece, or an unattacked pawn on the 2nd or 7th rank.",
"sae_29313": "A white queen attacks a square that is also attacked by a black piece, where the target square is occupied by a black piece or is empty.",
"sae_29322": "A white queen or rook attacks an empty square, often on the 7th or 2nd rank, with no black defenders.",
"sae_29266": "A square on the first rank is attacked by a white rook and at least one other white piece, and also attacked by a black rook.",
"sae_29337": "A rook on an open file or semi-open file, with no immediate attackers or defenders.",
"sae_29323": "A white knight on the 3rd rank (or h5) is attacked by one black piece and defended by at least two white pieces.",
"sae_29310": "Detects a Black Knight on the 5th, 6th, or 7th rank that is attacked by at least one Black piece and not attacked by any White pieces.",
"sae_29373": "The feature detects a square that is attacked by both sides, with the attacking side having at least one more attacker than the defending side.",
"sae_29349": "Detects an empty square on the 6th, 7th, or 8th rank that is attacked by at least two enemy pieces and not attacked by any friendly pieces.",
"sae_29348": "A white pawn on the 7th rank (or 6th rank for a passed pawn) that can promote to the target square, which is empty and not attacked by black.",
"sae_29334": "An unattacked enemy pawn on the 5th or 6th rank, with a friendly pawn on an adjacent file on the 4th or 5th rank.",
"sae_29356": "Central piece activity enabling a discovered attack or fork, often involving a rook or knight controlling the d- or e-file in the endgame.",
"sae_29390": "A rook on the 2nd or 7th rank (relative to its color) that is not attacked by the opposing side.",
"sae_29403": "White pieces aligned on the same open rank or file, forming a battery or supporting a tactical operation.",
"sae_29405": "White attacks a black rook on the back rank, which is defended by at least one black piece.",
"sae_29341": "A white pawn on the 4th rank is attacking an empty square on the 5th or 6th rank, which is also attacked by at least one other white piece and not attacked by any black pieces.",
"sae_29366": "A queen on the target square, attacked by zero or one enemy pieces, and zero friendly pieces.",
"sae_29344": "A pawn or knight on the 7th rank (or 2nd rank for Black) is attacked by one piece and defended by one piece.",
"sae_29387": "Detects squares on the 7th rank (for white) or 2nd rank (for black) that are undefended by the side to move and heavily attacked by the opponent.",
"sae_29455": "A pawn on the 2nd, 3rd, 4th, or 5th rank is attacked by one white piece and defended by one or two black pieces.",
"sae_29404": "An undefended square on the 8th rank (or h5 in one case) that is attacked by at least one black piece, with white to move.",
"sae_29501": "A white piece is attacked by a black queen or rook, and is defended by at least two white pieces.",
"sae_29472": "Detects a square that is attacked by an enemy piece, but not defended by the side to move, and is on the 3rd or 4th rank.",
"sae_29342": "The feature detects a white king-side pawn push (h2-h4 or g2-g4) that opens lines for white's pieces, especially when the king is castled short.",
"sae_29423": "A square on the 3rd or 6th rank that is not attacked by the opponent, and is either empty or occupied by an opponent's pawn.",
"sae_29456": "The feature detects empty squares on the second rank that are not attacked by the opponent, especially when the king is on the first rank.",
"sae_29358": "A white piece (Bishop or Knight) is attacked by 0-1 black pieces and defended by 0-2 white pieces, with the white piece being on a central square (d4, d5, e4, e5) or a square adjacent to the center (c4, c5, f4, f5, b5, g5, h4).",
"sae_29418": "A king on the first rank, with a friendly knight on the second rank, and no enemy pieces attacking the king.",
"sae_29545": "A black bishop is attacked by at least one black piece, and is on a square that is attacked by at least one white piece.",
"sae_29426": "White rook attacks an empty square on the 7th or 8th rank, with no black defenders.",
"sae_29552": "Detects a back-rank square contested by a white rook or queen and the black king, typically in hook-mate or Anastasia-mate build-up patterns.",
"sae_29514": "This feature detects a black bishop on a square attacked by at least one black piece and zero white pieces.",
"sae_29497": "A square is attacked by white and undefended by black, with at least one white attacker being a rook or queen.",
"sae_29542": "A square attacked by one friendly piece and two enemy pieces, where the friendly attacker is a Queen.",
"sae_29554": "Detects a black knight on the 2nd, 3rd, or 4th rank, on a square that is not attacked by white, and is adjacent to a white pawn.",
"sae_29569": "The feature detects a square that is attacked by one white piece and one black piece, and is located on the kingside, often near the black king.",
"sae_29565": "White pawn on the 4th rank, with no white attackers, and no black attackers.",
"sae_29636": "A king is on the 7th rank, and the target square is on the 7th rank, with no pieces on the target square.",
"sae_29639": "A pawn on e3/e4/e5/e6 attacking an empty square on f4/f5, with the target square being attacked by at least one black piece.",
"sae_29652": "White king in a relatively safe position in a rook or mixed endgame, not under immediate attack, often with active rooks on open files.",
"sae_29561": "The feature detects a pawn push to the 3rd or 4th rank, often creating a passed pawn or attacking a king, with at least one white attacker and few black defenders.",
"sae_29577": "White king on the first rank, with a pawn on the second rank, and no other white pieces on the first rank, and the target square is on the first rank.",
"sae_29653": "A white bishop is attacked by no black pieces, and is attacked by at least one white piece, on a square in the first three ranks.",
"sae_29661": "A square attacked by both sides, with white having one more attacker than black.",
"sae_29621": "Detects a pawn on the 7th rank (for White) or 2nd rank (for Black) that is undefended by the side to move and attacked by the opponent.",
"sae_29656": "White king on the back rank or 7th rank, attacked by 0 black pieces, and defended by at least one white piece.",
"sae_29721": "A white knight is attacked by at least one black piece and defended by at least one white piece.",
"sae_29664": "A white rook on the first rank is attacked by at least one white piece, and the target square is the rook's original square (a1 or h1).",
"sae_29712": "A square on the 8th rank is attacked by a white rook, or a square on the 7th rank is attacked by a white rook, or a square on the 6th rank is attacked by a white rook.",
"sae_29789": "The feature detects an empty square on the first rank, adjacent to the king, that is not attacked by the opponent.",
"sae_29669": "A square that is attacked by two black pieces and one white piece, with no piece currently on the square.",
"sae_29794": "Black pawn on the 7th rank attacked by at least one black piece, with no white attackers.",
"sae_29781": "A black knight on the 5th or 6th rank, attacked by 0-1 white pieces and 0-2 black pieces.",
"sae_29790": "The feature detects squares attacked by exactly one black piece and zero white pieces, where the target square is not occupied by a piece.",
"sae_29873": "A square is attacked by at least one black piece and not attacked by any white piece, and is not occupied by any piece.",
"sae_29731": "White Queen on the 2nd or 3rd rank, attacked by 0 black pieces, and not attacked by white pieces (except in one case where it is attacked by 2 white pieces).",
"sae_29742": "A white knight attacks a square that is not attacked by any black pieces.",
"sae_29860": "White's queen or rook attacks a square on the 2nd or 3rd rank that is also attacked by a black piece.",
"sae_29809": "A pawn on the 2nd rank (for the side to move) is attacked by exactly one friendly piece and not attacked by any enemy pieces.",
"sae_29807": "A white pawn on the 4th or 5th rank is attacked by 0-1 black pieces and defended by 2-3 white pieces.",
"sae_29802": "The feature detects squares attacked by at least two white pieces and exactly one black piece, where the square is empty.",
"sae_29887": "Pawn tension in the middlegame or endgame where a pawn on home-side ranks is under enemy pressure with minimal friendly support.",
"sae_29830": "A square on the 6th rank (for white) or 3rd rank (for black) that is empty or contains a king, and is not attacked by the side to move.",
"sae_29828": "The feature detects squares on the 2nd rank (for white) or 7th rank (for black) that are attacked by both sides, especially when the target square is occupied by a piece.",
"sae_29871": "The feature detects a king being attacked by a rook, queen, or bishop, where the attacking piece is on the same rank, file, or diagonal as the king, and there are no pieces between them.",
"sae_29933": "The feature detects a square that is attacked by both sides, with white having at least one more attacker than black, and the square is on the 1st or 2nd rank for white, or the 7th rank for black.",
"sae_29958": "Black's king is on h8, and it is attacked by at least one black piece, but not by any white pieces.",
"sae_29939": "The feature detects a white pawn on g2 or h2 that is attacked by at least one black piece and defended by exactly one white piece, with white to move.",
"sae_29881": "A king is on the same rank or file as an enemy rook, with no pieces in between them.",
"sae_29899": "Detects a king on the 6th rank, with a rook on the same rank, and an empty square on the 7th or 8th rank on the opposite side of the board from the king.",
"sae_29878": "The feature detects a vacant square on the first rank (for the side to move) that is attacked by at least one friendly piece and at most one enemy piece, often with a rook or queen involved in the attack.",
"sae_29960": "Detects a square attacked by exactly one black piece, where the square is on the same rank or file as the white king, and the white king is not on the first or eighth rank.",
"sae_29949": "White's knight on f3 is attacked once by Black and defended at least twice by White.",
"sae_29965": "A square on the 7th or 8th rank is attacked by a black rook, and the white king is on the 1st or 2nd rank.",
"sae_30054": "A white pawn or knight on the 2nd or 3rd rank, attacked only by white pieces, with no black attackers.",
"sae_29972": "A king on the back rank or second rank, with the target square being a square on the back rank or second rank that is adjacent to the king and is not attacked by the opponent.",
"sae_29984": "A white pawn is on the 4th rank, attacking a central square (d5/e5) that is attacked by exactly one black piece and defended by at least two white pieces.",
"sae_30047": "The feature detects a black piece or empty square on the 7th or 8th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_30025": "Detects a black knight or bishop on a central square (c3, c5, e5, e7) or a square near the center (b4) that is not attacked by white.",
"sae_30055": "A square is attacked by at least two black pieces, and not attacked by any white pieces.",
"sae_29979": "A white pawn on g3 or g2 (or a white knight on f3) attacks h4, which is empty and undefended by black.",
"sae_29987": "Detects an unattacked enemy rook on its starting square (a8 or h8) on the back rank.",
"sae_29998": "Detects a white pawn or knight on the 5th or 6th rank that is attacked by two black pieces and defended by one white piece.",
"sae_30106": "A white piece attacks a square that is also attacked by a black piece, and the target square is either empty or occupied by a white pawn.",
"sae_30164": "This feature detects a black pawn on the 5th or 6th rank that is attacked by at least one white piece and defended by at least one black piece.",
"sae_29746": "A pawn on the second rank (for the side to move) that is attacked by an enemy piece and defended by exactly one friendly piece.",
"sae_30143": "A knight on the first three ranks (1-3 for white, 6-8 for black) that is either undefended or attacked by more enemy pieces than friendly pieces.",
"sae_30184": "A square attacked by at least two black pieces and at most one white piece, with no piece currently on the square.",
"sae_30127": "The feature detects squares that are attacked by exactly one black piece and zero white pieces, especially when the target square is on the back rank or occupied by a pawn.",
"sae_30075": "A white pawn on the 2nd, 3rd, or 4th rank that is attacked by at least one white piece and at most one black piece.",
"sae_30066": "Detects squares attacked by a white knight on c4, with the white king on b3 and a white bishop on d2.",
"sae_30133": "A pawn on the 6th rank (for white) or 3rd rank (for black) that is attacked by an enemy piece and not defended by a friendly piece.",
"sae_30217": "The feature detects squares on the 2nd or 3rd rank that are undefended by either side and are in front of the king.",
"sae_30185": "A king on the back rank or adjacent to it, with no friendly pieces defending the back rank, and an enemy piece attacking a back rank square.",
"sae_30099": "A white pawn on d4 or e4 is attacked by multiple white pieces and is not attacked by any black pieces.",
"sae_30138": "A pawn on the 2nd or 3rd rank (from its side) that is attacked by a friendly piece and not attacked by an enemy piece.",
"sae_30275": "White attacks a black rook on the back rank, which is defended by two black pieces.",
"sae_30186": "The feature detects a square that is attacked by exactly one black piece and zero white pieces, where the attacking black piece is a rook.",
"sae_30300": "A pawn on the 7th rank (or 2nd for black) is about to promote, delivering pillsbury's mate with a rook already on the back rank.",
"sae_30263": "White pawn promotion to the 8th rank, with the target square being empty and not attacked by black.",
"sae_30258": "A square is attacked by black and defended by white, with white having at least as many attackers as black.",
"sae_30095": "A square attacked by white, with no black attackers, that is either empty or occupied by a white piece, and is not on the first rank.",
"sae_30266": "A white knight on b1 is defended by two white pieces, often a rook and a queen, and is not attacked by black.",
"sae_30331": "White pawn on the 3rd or 4th rank, attacked by at least one white piece, and potentially attacked by a black piece.",
"sae_30332": "Detects squares on the first rank that are not attacked by the opponent, especially when the king is on the back rank and there are no pieces on the first rank.",
"sae_30250": "The feature detects a square attacked by a black rook, where the square is on the same rank or file as the white king, and the white king is not attacked.",
"sae_30239": "A rook on its starting square (or a square it could have started on) that is attacked by an enemy piece.",
"sae_30354": "A square on the 6th or 4th rank (for white) or 3rd or 5th rank (for black) that is attacked by 1 white piece and 2 black pieces.",
"sae_30349": "The feature detects a black piece on the back rank (rank 8) that is undefended by black pieces and not attacked by white pieces.",
"sae_30310": "A rook on its starting square (a1 or h1) that is not attacked and has no pieces directly in front of it on the second rank.",
"sae_30388": "A square on the 6th rank is attacked by one white piece and one black piece, with white having a pawn on the 5th rank adjacent to the target square.",
"sae_30414": "This feature detects a square attacked by a single black piece, which is not attacked by any white piece, and is on the first or second rank.",
"sae_30363": "This feature detects a white piece (Bishop or Knight) on the 3rd rank that is attacked by one black piece and defended by at least one white piece.",
"sae_30380": "Detects squares on the 7th rank (or 2nd rank for Black) that are attacked by a Black pawn and are not attacked by a White piece.",
"sae_30329": "Detects empty squares on the 2nd and 3rd ranks in front of the white king, especially those attacked by a white bishop on d4.",
"sae_30384": "Detects a king under attack where the defending side has fewer or equal defenders on the king square, regardless of the king's proximity to its starting square.",
"sae_30242": "Detects an empty square on the 8th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_30395": "The feature activates when the king is on the first rank, and the target square is an empty square on the first rank, two squares away from the king, with no pieces between the king and the target square.",
"sae_30428": "A square is attacked by white and either attacked by black or has no black attackers, and is a potential destination for a white piece.",
"sae_30460": "An empty square on the 8th rank that is attacked by at least 3 black pieces and 0 white pieces.",
"sae_30393": "White attacks a black piece on a central square (d4, c5, f5, b3, g4) with at least one white attacker and no more than one black attacker.",
"sae_30246": "A white knight on d5 or f5 attacks a target square that is undefended by black and attacked by at least one other white piece.",
"sae_30439": "The feature detects a white pawn on a2 or b2, with the white king on a1 or b1, and a black bishop on d4, e4, or f4, targeting squares on the c-file or d-file.",
"sae_30519": "A white knight on a central square (c3, b5, e3, f4) is attacked by one black piece and defended by at least one white piece.",
"sae_30497": "The feature detects a square that is attacked by at least two black pieces and at most two white pieces, with the target square often being empty or occupied by a white piece.",
"sae_30386": "A white rook on its starting square (a1 or h1) with no white or black pieces attacking it.",
"sae_30582": "The feature detects a black bishop on the b-file, with the white king on the back rank, and a white pawn on the a-file.",
"sae_30492": "A square on the 2nd, 3rd, or 4th rank is attacked by at least two white pieces and no more than one black piece.",
"sae_30561": "A pawn on the 3rd or 4th rank (from its side) that is attacked by one enemy piece and defended by at least two friendly pieces.",
"sae_30634": "A target square on the 6th or 7th rank that is attacked by at least two enemy pieces and is not attacked by any friendly pieces.",
"sae_30490": "A white pawn on the 4th rank is attacking a square on the 5th rank, which is not attacked by any black pieces.",
"sae_30659": "White attacks a black queen on an open square with one piece, while black also attacks the queen with at most one piece.",
"sae_30559": "A white rook on the back rank (rank 1 or 2) is attacking an empty square on the same rank, with no black attackers on that square.",
"sae_30494": "A rook is attacked by an equal number of white and black pieces, or a king is attacked by a single black piece.",
"sae_30652": "White king is on the same rank or file as the black king, with no pieces in between, and the black king is on the target square.",
"sae_30629": "A square on the 3rd or 4th rank (from the perspective of the side to move) that is attacked by at least two enemy pieces and not attacked by any friendly pieces.",
"sae_30573": "A square on the back rank is attacked by an enemy piece, with no friendly pieces defending it.",
"sae_30548": "A white pawn on the 6th rank (or 3rd rank for black) that is attacked by at least one white piece and not attacked by any black pieces.",
"sae_30631": "A queen on the 2nd or 7th rank, attacking a square on the same rank, with the king on the 4th or 5th rank, and a pawn on the 2nd or 7th rank.",
"sae_30526": "The white king is on the back rank, and the black king is on the 6th or 7th rank, with no white attackers on the black king's square.",
"sae_30703": "A pawn on the 3rd rank is attacked by a pawn on the 4th rank and defended by a pawn on the 2nd rank, creating a pawn chain.",
"sae_30397": "A queen is attacked by one of the side-to-move's pieces and is not defended by the opponent.",
"sae_30747": "Target square is attacked by an enemy queen, and is undefended by the side to move.",
"sae_30755": "The feature detects a king on an edge square (rank 1/8 or file a/h) that is not attacked by the opponent, with a friendly rook or queen nearby.",
"sae_30704": "White Queen attacks an empty square on the 7th or 8th rank, with no Black pieces attacking the square.",
"sae_30802": "A white pawn on g2 or f2 is pushed to g3 or f3, opening the kingside for white's pieces.",
"sae_30769": "White attacks a black queen on an open square with at least one piece, and the queen is not defended.",
"sae_30817": "Detects squares on the first rank that are attacked by a white queen on the second rank.",
"sae_30670": "A white piece on the 3rd rank is attacked by white pieces and not attacked by black pieces.",
"sae_30855": "Detects empty squares on the 8th rank that are attacked by a black piece.",
"sae_30767": "The feature detects a white queen attacking an empty square or a black queen, with no black pieces attacking the target square.",
"sae_30775": "The feature detects a white king safety issue where the king is on the back rank and is attacked by a black queen, with white having at least one defender.",
"sae_30774": "The feature detects a white king safety issue where the king is on the back rank and the target square is a back rank square that is attacked by at least two white pieces and zero black pieces.",
"sae_30856": "A pawn or knight on the 5th or 6th rank is attacked by one of the side-to-move's pieces and is either undefended or defended by one of the opponent's pieces.",
"sae_30874": "A square on the first rank that is attacked by a black rook and not defended by white.",
"sae_30892": "The feature detects a target square that is on the same rank or file as the enemy king, with no pieces between them, and the target square is not attacked by the enemy.",
"sae_30895": "A white rook attacks an empty square on the back rank, with no black pieces attacking that square.",
"sae_30930": "A square attacked by at least one black piece, but not by any white pieces, where the target square is empty.",
"sae_30951": "White Queen on the first rank, attacked by at least one white piece, and not attacked by any black pieces.",
"sae_30965": "This feature detects a black bishop on a square where it is not attacked by white pieces.",
"sae_31014": "A square on the first rank is attacked by a white rook and at least one black piece.",
"sae_30678": "White has multiple pieces attacking the f1 square, which is currently empty and on the king's side.",
"sae_30903": "White attacks an empty square on the 8th rank, which is also attacked by at least one black piece.",
"sae_31026": "A pawn on the 5th or 7th rank that is not attacked by either side.",
"sae_31006": "A white piece (Knight or Bishop) on the 2nd rank is attacked by no black pieces and defended by no white pieces.",
"sae_30934": "The feature detects a black bishop on g7 or e7, attacked by one black piece, and not attacked by any white pieces.",
"sae_31085": "The feature detects a white rook on a corner square (a1 or h1) that is attacked by exactly one black piece and defended by at least one white piece.",
"sae_31009": "Detects squares on the back rank that are not attacked by any pieces, with the king on the 7th or 8th rank.",
"sae_30983": "White King is on its starting rank (1st or 2nd) and is attacked only by white pieces.",
"sae_30939": "A piece on the target square is attacked by at least one black piece and at most one white piece, with the target square often being on the kingside or a central pawn.",
"sae_30962": "A pawn on the 5th rank (for white) or 4th rank (for black) that is attacked by one piece and defended by one piece.",
"sae_31032": "The feature detects a central or near-central empty square that is attacked by white and defended by black, with white having at least as many attackers as black.",
"sae_30999": "The feature detects a king on the 7th or 8th rank, with a friendly rook on the 6th rank or below, and the target square is on the same file as the king and rook, or on an adjacent file.",
"sae_30778": "Empty squares on the back rank (rank 8 for white, rank 1 for black) that are attacked by a black rook.",
"sae_31108": "Detects an empty square on the back rank (1st or 8th) that is heavily attacked by the side to move and not attacked by the opponent.",
"sae_31076": "A square attacked by at least two white pieces and zero black pieces, often near the white king or a pawn structure.",
"sae_31087": "White's rook on its starting square (a1, b1, f1, or h1) is attacked by 0-1 black pieces and defended by 1-4 white pieces.",
"sae_30964": "Detects a white bishop attacking an empty square on the 6th, 7th, or 8th rank, with no black pieces attacking that square.",
"sae_31038": "A pawn on the 4th rank is attacked by a pawn on an adjacent file, and defended by a friendly piece.",
"sae_30740": "This feature detects a white rook on its starting square (1st rank) that is heavily defended by white pieces and not attacked by black pieces.",
"sae_31155": "This feature detects a black piece on a square that is attacked by at least one black piece and attacked by zero or one white pieces.",
"sae_31145": "A square on the 4th or 5th rank, attacked by at least two white pieces and no black pieces, with at least one white pawn on an adjacent square.",
"sae_31164": "A square on the 6th, 7th, or 8th rank that is undefended by pawns and attacked by a queen.",
"sae_31165": "A square attacked by white, with no black attackers, and a white pawn on an adjacent square.",
"sae_31178": "A square is attacked by at least one enemy piece, and the side to move has no pieces attacking it.",
"sae_31188": "The feature detects a king on the first rank, with a bishop on the second rank, and a pawn on the third rank, all on the same file, with the target square being the corner of that file.",
"sae_30779": "A square on the 7th rank (or 2nd rank for Black) that is attacked by at least two pieces and defended by at most one piece, often with a king nearby.",
"sae_31176": "White is attacking a square that is defended by a black piece, and the target square is on the first or second rank.",
"sae_31284": "A square on the 2nd or 3rd rank that is attacked by both sides, often near the king.",
"sae_31206": "A square attacked by one white piece and one black piece, with the exception of one case where the square is attacked by only one black piece.",
"sae_31248": "The king is on a corner square (a1 or h1/a8 or h8) and is attacked by a friendly piece.",
"sae_31211": "A square attacked by at least 2 black pieces and at most 1 white piece, where the target square is empty.",
"sae_31195": "White king is on the 2nd or 3rd rank, and the black king is on the 4th, 5th, or 6th rank, with no pieces attacking the black king.",
"sae_31031": "The feature detects a square attacked by one black piece and one or more white pieces, where the square is occupied by a white piece, often a knight or bishop.",
"sae_31305": "Detects a king on the back rank, especially in a corner, with limited pawn cover.",
"sae_31353": "A white rook or queen attacks a black piece on the 7th or 8th rank, which is also attacked by a black piece.",
"sae_31342": "Kings in close proximity (within 2-3 squares) in a king and pawn endgame.",
"sae_31294": "Rook endgame where White has a positional or material advantage \u2014 connected rooks, dominant king, or passed pawn supported by the rook.",
"sae_31322": "Detects a king on the back rank, with a friendly rook on the same rank, and an empty square between them, indicating a potential castling opportunity or a discovered attack.",
"sae_31349": "A white pawn on the 2nd, 3rd, or 4th rank, attacked by 0-1 black pieces, and defended by 1-3 white pieces.",
"sae_31445": "White Queen on d1, attacked by 1-4 white pieces, and 0 black pieces.",
"sae_31402": "Black pawn on g7, attacked by a black piece, with no white attackers.",
"sae_31397": "A rook or queen that becomes a target after a deflection or tactical sequence, where the attacker exploits a weakly defended heavy piece to gain material or force mate.",
"sae_31377": "A king on the edge of the board is attacked by a queen or bishop from a long distance, with a pawn or king blocking the attack.",
"sae_31517": "The feature detects a black rook on its home rank (8th rank) that is attacked by at least two black pieces and zero white pieces.",
"sae_31480": "A white piece attacks a square on the 3rd rank, which is also attacked by at least one black piece.",
"sae_31438": "White's king is on the g-file, and a black piece attacks a square on the g-file that is one or two squares away from the king.",
"sae_31497": "The feature detects squares that are attacked by a black rook and are on the same rank or file as the black king, but not attacked by a white piece.",
"sae_31345": "The feature detects a king on the 6th, 7th, or 8th rank, with a white piece attacking an adjacent square, typically a pawn or empty square, often creating a mating net or a discovered attack.",
"sae_31518": "White has multiple attackers on a black piece on the 3rd rank, with the black piece having few or no defenders.",
"sae_31400": "Black king on g7/g8/h8 with no white attackers, but at least one black attacker, suggesting a potential for a back-rank mate or a king safety issue.",
"sae_31449": "White pawn on its starting square (2nd rank) attacked by at least one white piece and not attacked by any black pieces.",
"sae_31506": "A square is attacked by at least two black pieces and zero white pieces, and the square is empty.",
"sae_31567": "A black bishop on its starting square (or a square it could reach in one move from its starting square) that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_31542": "A white bishop is attacked by at least one black piece, and defended by at least one white piece.",
"sae_31541": "A square is attacked by one white piece and one black piece, and white has a queen or rook that can move to that square.",
"sae_31412": "A pawn on the 4th or 5th rank is attacked by an enemy pawn and defended by a friendly pawn, with the attacking pawn being on an adjacent file.",
"sae_31559": "A square attacked by the opponent is defended by the side to move, with the side to move having one more attacker than the opponent.",
"sae_31189": "The feature activates for empty squares on the first rank, especially in the corners, when the king of the side to move is on the same rank or an adjacent rank, and there is a rook of the side to move on the same rank or an adjacent rank.",
"sae_31590": "King on the edge of the board, attacked by a queen from a distance, with no immediate defenders.",
"sae_31360": "A white queen or rook attacking an empty square on the first or second rank, with no black pieces attacking that square.",
"sae_31581": "A pawn on the 2nd, 3rd, or 4th rank is attacked by at least one black piece and defended by at least one white piece, with white having at least as many attackers as black.",
"sae_31494": "The feature detects a pawn on h4 or f4 that is attacked by a black piece and not defended by a white piece, with the white king nearby.",
"sae_31624": "The feature detects a queen on a square attacked by one enemy piece and attacked by one or two friendly pieces.",
"sae_31534": "A white knight on a central or kingside square, often undefended or lightly defended by White, and not attacked by Black.",
"sae_31625": "A king is on the same rank or file as the target square, with no pieces between them.",
"sae_31639": "A square is attacked by at least one black piece and at most one white piece, and the square is empty.",
"sae_31628": "A queen defended by 1\u20132 friendly pieces with no opponent attackers, on any square.",
"sae_31617": "A queen is attacked by one white piece and one or more black pieces, and white can capture the queen.",
"sae_31688": "White bishop attacks an empty square, with no black pieces attacking that square.",
"sae_31606": "White pawn on f2/g2/b2 attacked by a white piece, with no black attackers.",
"sae_31633": "Pawn on a7 or h7 with no attackers from either side, often in a king-side or queen-side pawn structure.",
"sae_31689": "White Queen on d1, attacked by at least two white pieces and zero black pieces.",
"sae_31433": "A square that is attacked by at least one black piece, not attacked by any white piece, and is the target of a white pawn promotion.",
"sae_31637": "The feature detects a pawn on f7 or e6 (or f3 for black) attacked by one white piece and defended by one or two black pieces, often a queen.",
"sae_31692": "A white pawn on the 4th rank is attacked by one black piece and defended by two white pieces, with an additional white attacker on the target square.",
"sae_31717": "Detects a pawn on the 2nd rank that can advance two squares, with the target square being attacked by a friendly piece.",
"sae_31719": "A critical 3rd-rank (White) or 6th-rank (Black) square in a king-and-pawn endgame, often key to zugzwang or a pawn breakthrough.",
"sae_31538": "A white piece attacks an empty square that is attacked by at least one black piece, and the square is on the 2nd, 3rd, or 4th rank.",
"sae_31727": "The feature detects a king on the back rank, with the target square being a back rank square that is attacked by an enemy rook and not defended by a friendly piece.",
"sae_31682": "The feature detects a king on the same rank or file as a pawn, with the target square being the corner of the board on that same rank or file, and the pawn is on the 7th rank (for white) or 2nd rank (for black) relative to the king's side of the board.",
"sae_31758": "A knight on the 6th or 7th rank is attacking a square on the back rank, with the king of the opposite color on the 8th rank.",
"sae_31782": "A white bishop on its starting square (c1 or f1) is attacked by at least one white piece and not attacked by any black pieces.",
"sae_31734": "White king on the 7th or 8th rank, with a pawn on the 6th or 7th rank, and the target square is on the 8th rank, with no pieces on it.",
"sae_31760": "A white pawn on the 7th rank (P7) is attacking an empty square on the 8th rank.",
"sae_31824": "A white rook or pawn attacks a black pawn or knight, which is also attacked by at least one black piece.",
"sae_31806": "A king on its home rank under direct attack from an enemy piece, with limited defensive cover.",
"sae_31737": "White king is adjacent to the black king, with a white pawn on the same rank or file as the black king, one square away from the black king, and between the two kings.",
"sae_31817": "White's rook or queen attacks a square on the 7th or 8th rank, often with other white pieces supporting or black pieces defending.",
"sae_31735": "White king on the 4th rank, with an empty square on the 1st rank directly behind it.",
"sae_31762": "A square is attacked by at least two enemy pieces and at most one friendly piece, with the target square often being a pawn or an empty square on the 4th or 5th rank.",
"sae_31804": "Detects a square that is attacked by white, not attacked by black, and is a good outpost for a white knight (often on c3, e4, or f3).",
"sae_31841": "The feature detects a target square that is attacked by both sides, with the attacking pieces being pawns and knights, and the target square is often in the center or near the king.",
"sae_31853": "A knight or queen on a central square (d4, c4, f5, f6) that is attacked by one white piece and defended by one or two black pieces.",
"sae_31827": "Detects an empty square on the a or b file, on ranks 3, 4, or 5, that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_31838": "Black king on g8, attacked by at least one black piece, with no white attackers.",
"sae_31900": "Detects a black pawn on f7 or h7, or a black king on e8, that is attacked by at least two black pieces and zero white pieces.",
"sae_31871": "A white piece is attacked by a black piece and defended by exactly one white piece, with the white king nearby.",
"sae_31918": "White's f1 square is attacked by at least 3 white pieces, with no black attackers, often involving a queen, bishop, and knight, and the king is on e1 or g1.",
"sae_31885": "A square is attacked by at least two white pieces, with no black attackers, and the square is on the 2nd or 3rd rank for white.",
"sae_31844": "The enemy king is on the a-file or h-file, and the side to move has a queen or rook that can deliver check along that file.",
"sae_31998": "A black rook on an open file or semi-open file, attacked by at least two black pieces, with no white attackers.",
"sae_31924": "A queen is attacked by one white piece and one black piece, or a square is attacked by two white pieces and two black pieces.",
"sae_31904": "A square is attacked by white and is a potential outpost for a white piece, often a knight or bishop, to attack the opponent's king or pawns.",
"sae_31941": "Detects a king on the 3rd rank from its own back rank, with no attackers on it.",
"sae_31978": "A queen is attacked by one white piece and multiple black pieces, with the white attacker being a pawn or knight.",
"sae_32023": "White's king is on the kingside, and the h8 square is attacked by a black piece (or is undefended) and is a potential target for a back-rank mate or a checkmate on the h-file.",
"sae_31932": "A white piece sacrifices to an empty square heavily dominated by black pieces, exploiting an x-ray or overloading tactic.",
"sae_31931": "The feature detects a king on the 7th or 8th rank, with a rook or queen on the same rank, and a target square on the opposite side of the board from the king, on the 1st or 8th rank.",
"sae_32043": "A square attacked by a single black piece, which is also adjacent to the white king.",
"sae_32003": "A square on the 6th rank is attacked by a black piece and undefended by white.",
"sae_32029": "The feature detects a pawn or knight on a central square (c4, c5, d4, e4, b4) that is attacked by at least one enemy piece and defended by at least one friendly piece, often with an equal number of attackers and defenders.",
"sae_32032": "White's king is on the back rank, and a white rook or queen attacks a square on the second rank, which is empty and not attacked by black.",
"sae_31997": "A square is attacked by two enemy pieces and defended by one friendly piece, with the friendly king nearby.",
"sae_32107": "A square attacked by exactly one white piece and exactly one black piece, where the white attacker is a rook.",
"sae_32098": "A square on the 5th or 6th rank that is attacked by a black pawn and is not attacked by a white piece.",
"sae_32149": "Black rook on a8, with no white attackers and no black attackers, and the white queen is on the kingside.",
"sae_32056": "A square that is attacked by at least two enemy pieces and by at most one friendly piece.",
"sae_32106": "A white piece attacks a black piece on a square where the black piece is defended by two black pieces and attacked by one or two white pieces.",
"sae_32108": "White knight attacks an empty square, with the white king nearby and the black king also nearby.",
"sae_32135": "Detects a pawn on the 7th rank (for the side to move) that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_32178": "A square is attacked by an enemy piece, and the side to move can attack it with a queen, rook, or bishop.",
"sae_32067": "Target square is undefended by the side to move, and attacked by at least one enemy piece, often a pawn or knight, on the 7th rank.",
"sae_32187": "Detects a black knight on b8 or g8, especially when attacked by white.",
"sae_31894": "A complex middlegame where black has multiple pieces attacking the white king-side with no immediate white counter-attack.",
"sae_32177": "The feature detects a square that is attacked by at least one black piece and by at most one white piece, where the target square is not occupied by a white piece.",
"sae_32092": "A queen on an open file/diagonal is attacked by one enemy piece and defended by one friendly piece, with the attacking piece being a knight or bishop.",
"sae_32111": "White's rook on h1 is undefended and under no immediate attack, often with a king on g1 or f1, and the h-file is open or semi-open.",
"sae_32185": "A pawn is on the 6th or 7th rank, attacked by two enemy pieces, and not defended by any friendly pieces.",
"sae_32235": "White's rook on a1 or h1 is undefended by white pieces and not attacked by black pieces.",
"sae_32197": "A pawn on d5 or e5 (or g4) that is attacked by one white piece and defended by two black pieces, or attacked by two white pieces and defended by two or three black pieces.",
"sae_32240": "The feature detects a white king on the second rank, with a white pawn on the third rank, and a black king on the fourth or fifth rank, with the target square being the first rank.",
"sae_32159": "Detects a king-side castling square (g1/h1 for white, g8/h8 for black) or a queen-side castling square (a1/b1 for white, a8/b8 for black) that is attacked by exactly one friendly piece and zero enemy pieces.",
"sae_32295": "A black queen is attacked by no white pieces, but is on a square that a white piece could move to, attacking the queen.",
"sae_32249": "A white pawn on the 4th or 5th rank, attacked by 0-1 black pieces, and attacked by 0-2 white pieces.",
"sae_32292": "White attacks a black pawn on the 5th or 6th rank, which is defended by at least two black pieces.",
"sae_32333": "A pawn on the 4th rank is attacked by a black pawn and defended by a white pawn, with the white king nearby.",
"sae_32299": "A square is attacked by at least one white piece and at least one black piece, with black having more attackers than white.",
"sae_32334": "A square attacked by exactly one white piece and exactly one black piece, where the target square is empty.",
"sae_32280": "A square attacked by both sides, with the side to move having at least as many attackers as the opponent, and the target square is often a pawn or empty.",
"sae_32348": "The feature detects squares that are attacked by a white bishop on the a1-h8 diagonal, regardless of whether the square is occupied or attacked by other pieces.",
"sae_32388": "The feature detects a square attacked by the side to move, defended by the opponent, and the square is on the 6th or 7th rank for the side to move.",
"sae_32402": "A white piece attacks a square that is also attacked by a black piece, and the target square is on the first rank.",
"sae_32368": "The feature detects a king on the target square, or an empty target square, with no white attackers and few or no black attackers, often with the king in a relatively exposed position.",
"sae_32356": "Black king's castling squares (g8/h8/g7/h7) are attacked by a single black piece, with no white attackers.",
"sae_32302": "A pawn on the 7th rank (f7 or g7) that is attacked by at least one black piece, often a queen, and is either undefended or defended by only one white piece.",
"sae_32429": "A black knight on the 5th or 6th rank, attacked by at least one white piece, and defended by at least one black piece.",
"sae_32444": "A white rook on the first rank is attacked by at least one black piece, and the target square is on the first rank.",
"sae_32116": "The feature detects a black bishop on a square that is not attacked by white pieces, but is attacked by at least one black piece.",
"sae_32389": "A white king is on the 7th or 8th rank, and a white rook or pawn attacks a square on the 1st or 2nd rank.",
"sae_32433": "A square is attacked by exactly one black piece and exactly one white piece, and the square is empty or occupied by a pawn.",
"sae_32440": "King on the first rank, attacked by a rook, with no friendly pieces defending the king.",
"sae_32447": "A pawn or empty square on the 2nd rank (for white) or 7th rank (for black) that is attacked by exactly one white piece and exactly one black piece.",
"sae_32458": "A square attacked by exactly one black pawn, with no white attackers, and the black king is nearby.",
"sae_32271": "A square on the 3rd rank (e3/f4) that is attacked by at least one white piece and at least one black piece, with white having at least as many attackers as black.",
"sae_32243": "The feature detects an empty square on the first rank that is not attacked by white pieces, and is often attacked by black pieces, especially when the white king is nearby.",
"sae_32497": "A black rook on the back rank or 7th rank, attacked by at least one white piece, and not defended by any black pieces.",
"sae_32244": "A square attacked by one white piece and one black piece, where the white king is nearby and the black king is not.",
"sae_32486": "A square attacked by 2-3 black pieces and 0-1 white pieces, often on the back rank or near the king.",
"sae_32465": "A square on the 6th or 7th rank (for white) that is attacked by a pawn and defended by a pawn.",
"sae_32503": "Detects a black knight on the 5th or 6th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_32453": "A square attacked by the opponent and defended by the side to move, where the side to move has more attackers than the opponent.",
"sae_32473": "A square attacked by one white piece and one black piece, where the white attacker is a rook and the black attacker is a rook.",
"sae_32451": "The feature detects a king on the 7th or 8th rank, with the target square being a square on the same rank as the king, and the king being the only piece on that rank.",
"sae_32514": "White pawns on the 2nd rank (or 7th for black) that are attacked by at least one white piece and at most one black piece.",
"sae_32508": "A square is attacked by one white piece and zero black pieces, and the square is on the back rank (rank 1 or 8).",
"sae_32466": "An empty square on the back rank (rank 8 for white, rank 1 for black) that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_32394": "A white queen attacking a black rook on the back rank, where the rook is also defended by another black piece.",
"sae_32565": "A white piece attacks a black queen on a square that is also attacked by a black piece.",
"sae_32502": "A square is attacked by a black piece, and the side to move (white) has a pawn on an adjacent square that could capture the attacking piece if it moved to the target square.",
"sae_32462": "A white piece on the back rank is attacked by one black piece and defended by at least one white piece.",
"sae_32520": "This feature detects a black knight on an open central square (d4, e4, d5, e5) or a square adjacent to the center (c4, f4, c5, f5) that is attacked by one white piece and defended by one black piece.",
"sae_32626": "This feature detects a black queen on the 6th, 7th, or 8th rank that is attacked by at most one white piece.",
"sae_32539": "A piece (often a bishop or knight) on a square that is not attacked by the opponent, but is attacked by a friendly piece (often a pawn), and is on a diagonal or file that is open or has potential to be opened.",
"sae_32551": "Detects a queen on a square attacked by an enemy piece, with no friendly attackers on that square.",
"sae_32651": "A white piece on the back rank (a1, d1, or f1) is attacked by one black piece and defended by at least one white piece.",
"sae_32574": "A pawn is attacked by one friendly piece and no enemy pieces, and the pawn is on the 3rd or 4th rank.",
"sae_32648": "A square is attacked by at least one black piece, not attacked by any white piece, and is on the 5th, 6th, or 7th rank.",
"sae_32573": "A square attacked by 2-3 white pieces and 1-2 black pieces, where the target square is empty and on ranks 3-6.",
"sae_32649": "The feature detects a pawn on f2 or h2 attacked by one black piece and defended by one or two white pieces, with the white king on g1 or h1.",
"sae_32617": "White King on its starting square (e1 or g1) with 0 black attackers and at least 0 white attackers.",
"sae_32639": "White rook attacks a black pawn on the a-file or f-file, with the pawn being undefended or defended by a single black piece.",
"sae_32652": "A square on the back rank (rank 8) that is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_32613": "A pawn on the 7th rank (for white) or 2nd rank (for black) is attacked by an enemy piece and defended by at least one friendly piece, with the target square being the square in front of the pawn.",
"sae_32602": "The feature detects an empty square on the 7th rank that is not attacked by the opponent, often with a pawn on the 6th rank or a rook on the 8th rank, suggesting a potential pawn promotion or rook lift.",
"sae_32703": "Black rook or queen exerting undefended pressure along the first rank, typically as a precursor to back-rank or corridor mate threats.",
"sae_32670": "A pawn on the 2nd, 3rd, 4th, or 5th rank is attacked by an enemy piece and undefended by a friendly piece.",
"sae_32693": "This feature detects a black bishop that is attacked by exactly one black piece and no white pieces.",
"sae_32642": "A white pawn on the 2nd rank is attacking an empty square on the 3rd rank, which is also attacked by a black pawn.",
"sae_32713": "A white rook on the 6th, 7th, or 8th rank, with no white attackers, and the target square is the rook's square.",
"sae_32725": "White rook attacks a black pawn on the a or b file, on ranks 4-7, with no black defenders.",
"sae_32727": "A white rook on the 7th rank (or 2nd rank for black) with no pieces between it and the target square, which is also on the 7th rank.",
"sae_32734": "A square on the 6th or 7th rank is attacked by at least two enemy pieces and defended by at most one friendly piece.",
"sae_32740": "A square is activated if it is on the same rank or file as the opponent's king, and there are no pieces between the square and the king.",
"sae_32755": "A white piece (often a knight) attacks a black piece (often a knight or bishop) on the 3rd rank, with at least two white attackers and few or no black defenders.",
"sae_32743": "White Queen is attacked by a Black Queen, and the White Queen is on the 3rd or 4th rank.",
"sae_32748": "Detects a square on the 6th or 7th rank that is attacked by a black queen, with the white king on the 7th or 8th rank.",
"sae_32746": "The feature detects a square attacked by White, where White has a single attacker and Black has at least one defender, and the square is on the 5th, 6th, or 7th rank.",
"sae_32782": "This feature detects a square that is attacked by exactly one black piece and no white pieces, where the attacking piece is a knight or a pawn.",
"sae_32773": "This feature detects a pawn that is attacked by the side to move and not attacked by the opponent, especially when the pawn is on the second rank.",
"sae_32777": "The feature detects squares on the first rank that are attacked by a queen.",
"sae_32783": "Detects a square that is attacked by a black rook, but not by any white pieces, and is on the same rank or file as the white king.",
"sae_32813": "A pawn on the 4th rank (for White) or 5th rank (for Black) that is attacked by at least one enemy piece and defended by zero friendly pieces.",
"sae_32838": "A square is attacked by at least one enemy piece, but not by any friendly pieces.",
"sae_32807": "A pawn on f7/g7/c7/f6 that is attacked by a white piece, or is a black pawn on f6/c7 that is not attacked by a white piece.",
"sae_32796": "This feature detects squares attacked by exactly one white piece and exactly one black piece, where the white attacking piece is a rook.",
"sae_32801": "Detects a king on the back rank (rank 1 or 8) with an empty square on the same rank, two squares away from the king, which is not attacked by the opponent.",
"sae_32855": "White knight on c3 or f3, attacked by 0-1 black pieces, and defended by 1-3 white pieces.",
"sae_32840": "A white bishop is on the first rank, attacked by no black pieces, and defended by at least one white piece.",
"sae_32871": "Detects squares attacked by black pieces, especially pawns, where white has no attackers.",
"sae_32887": "A white queen attacking a black piece (queen or rook) that is also attacked by a black piece, with the white queen being the sole white attacker.",
"sae_32847": "The feature detects a black pawn on the 5th or 7th rank that is undefended by white pieces.",
"sae_32903": "Black pawn on g7 attacked by a black piece, with no white attackers.",
"sae_32877": "Detects empty squares on the first rank that are attacked by a white queen on the second rank, with the black king on the first or second rank.",
"sae_32900": "A black bishop is attacked by a single black piece, and not attacked by any white pieces.",
"sae_32854": "This feature detects a white pawn on the 5th, 6th, or 7th rank that is attacked by one black piece and attacked by at least two white pieces.",
"sae_32906": "Empty back-rank squares in a pawn endgame, where advancement or promotion potential is the key strategic consideration.",
"sae_32918": "This feature detects a black knight on the 6th rank that is attacked by at least one white piece and defended by at least one black piece.",
"sae_32905": "The feature detects a king on the back rank or 7th rank, with no white attackers and no black attackers, indicating a potential back rank mate or king safety issue.",
"sae_32970": "An advanced or outpost knight (5th rank or higher) that is vulnerable to opponent attack.",
"sae_32914": "A square is attacked by white, and either undefended or attacked by fewer black pieces.",
"sae_32873": "White's queen or rook attacks a pawn on g7 or f7, often with the black king nearby.",
"sae_32890": "The feature detects a pawn on the 5th or 7th rank that is attacked by both sides, with white having at least as many attackers as black.",
"sae_32975": "The feature detects a piece on a square that is attacked by one white piece and one black piece, where the white piece is a Queen, Rook, or Bishop.",
"sae_32981": "A rook on the back rank or second-to-last rank, with no immediate attackers or defenders, and the king is on the opposite side of the board.",
"sae_32907": "A white pawn on the 4th rank is attacking an empty square on the 5th rank, with no black pieces attacking that square.",
"sae_33027": "Detects a king on an edge square, with no pieces directly adjacent to it on the board.",
"sae_33033": "A pawn on the 5th, 6th, or 7th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_33003": "White's queen or bishop attacks the f7/h7 pawn, which is defended only by the king.",
"sae_33014": "This feature detects a white queen on the first three ranks (1-3) that is attacked by exactly one white piece and not attacked by any black pieces.",
"sae_32998": "This feature detects squares attacked by a white queen and a white knight, with no black attackers.",
"sae_33073": "The feature detects a white pawn on the 3rd or 4th rank, attacked by a white piece (often a Bishop), and not attacked by any black pieces.",
"sae_33111": "Detects a square (or piece on it) that is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_33081": "The feature detects a white queen on a square attacked by exactly one black piece, with at least one white attacker.",
"sae_33136": "The feature detects a pawn or minor piece on a square that is attacked by exactly one white piece and exactly one black piece.",
"sae_33155": "White pawn on b2 or g2 attacks an empty square on a3 or h3, respectively, with no black pieces attacking that square.",
"sae_32904": "Detects a pawn on the 5th rank (for white) or 4th rank (for black) that is attacked by a queen.",
"sae_33170": "A minor or major piece with an imbalanced attacker-to-defender ratio, indicating a potential capture or tactical target.",
"sae_33082": "A square on the 4th, 5th, or 6th rank that is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_33186": "The feature detects an empty square on the 4th rank (a4 or h4) that is not attacked by white, and is either attacked by black or not attacked by anyone.",
"sae_33177": "This feature detects a square that is attacked by two white pieces and one black piece, where the target square is often a pawn or empty, and the white pieces are often a queen and a knight.",
"sae_33193": "This feature detects a knight on a square attacked by exactly one enemy piece, regardless of whether it's also attacked by friendly pieces.",
"sae_33205": "A white pawn on the 3rd or 4th rank, attacked by no black pieces, and defended by at least one white piece.",
"sae_33237": "The feature detects empty squares on the 8th rank that are not attacked by white pieces, especially when the white king is on the 1st rank.",
"sae_33194": "Detects a rook and enemy king both controlling a key square on or near the back rank, typically in rook-mate build-up positions (hook mate, Anastasia mate, blind swine).",
"sae_33162": "The feature detects a square attacked by exactly one white piece and exactly one black piece, where the target square is on the 7th or 8th rank for the black king's side, or the 1st or 2nd rank for the white king's side.",
"sae_33264": "White King is attacking an empty square on the back rank or edge of the board.",
"sae_33279": "White rook on the back rank, defended by at least one white piece, and not attacked by any black pieces.",
"sae_33329": "A square attacked by at least one black piece, with no white attackers, and no white piece on the square.",
"sae_33239": "The feature detects a queen on the same rank or file as the king, with the target square being a square on the same rank/file between them, and no pieces blocking the queen's attack on the king.",
"sae_33227": "Detects a queen or rook on the first two ranks, attacked by at least one friendly piece, and not attacked by any enemy pieces.",
"sae_33307": "The feature activates when the king is on the first rank and the target square is on the a-file, especially when the king is on the a-file.",
"sae_33297": "Detects squares on the 8th rank that are not attacked by white, especially when the black king is on the 6th or 7th rank.",
"sae_33221": "Detects a king on the back rank, with no friendly pieces on the back rank, and no friendly pieces on the second rank that can move to the back rank.",
"sae_33322": "A square is attacked by at least two black pieces and zero or one white pieces, with the side to move being white.",
"sae_33271": "The feature detects squares attacked by at least one black piece, where white has no attackers, and the square is on the first two ranks for white (7th or 8th for black).",
"sae_33325": "Black has a decisive tactical threat \u2014 advanced pawn, fork, or promotion \u2014 with White unable to mount sufficient defence.",
"sae_33355": "This feature detects a black rook on the 6th, 7th, or 8th rank, attacked by at least one black piece and zero white pieces.",
"sae_33327": "Detects squares on the 8th rank that are adjacent to the black king, especially when the black queen is also nearby.",
"sae_33317": "A square is attacked by one white piece and one black piece, and white is to move.",
"sae_33387": "A pawn on the 2nd rank is attacked by at least one friendly piece and is the target square.",
"sae_33349": "This feature detects a pawn on the 4th rank that can advance to the 5th rank, creating a passed pawn or attacking an enemy piece.",
"sae_33495": "A black bishop is on a square that is not attacked by white pieces, but is attacked by black pieces.",
"sae_33470": "A square attacked by a black piece and not defended by a white piece, where the target square is on the same rank as the white king.",
"sae_33342": "This feature detects a rook on its starting square (or a square it could have started on) that is not attacked by the opponent.",
"sae_33461": "A white piece attacks a black knight, which is also attacked by at least one other black piece, and the white piece is not a pawn.",
"sae_33497": "A queen is attacked by an enemy piece, and the queen is the only defender of the square it occupies.",
"sae_33548": "A square is attacked by exactly one black piece and no white pieces, and is a potential target for a white piece to capture or occupy.",
"sae_33494": "A pawn on the 3rd or 4th rank (from its side) that is attacked by an enemy piece and not defended by a friendly piece.",
"sae_33486": "Detects squares on the 7th or 8th rank that are undefended by white and attacked by black, especially those near the king.",
"sae_33517": "A pawn on the 7th rank (for white) or 2nd rank (for black) that is not attacked by the opponent and is not blocking a friendly piece.",
"sae_33476": "The feature detects a square attacked by at least one black piece, but not by any white pieces, where the target square is on the 5th rank.",
"sae_33616": "The feature detects a square attacked by 2-3 black pieces and defended by exactly one white piece, where the white piece is a queen.",
"sae_33536": "The feature detects a pawn on the 5th or 6th rank that is attacked by the opponent and defended by the side to move, with the opponent having more attackers than the side to move has defenders.",
"sae_33102": "The feature detects a white pawn on the 2nd rank (or 4th rank if it's a c-pawn) that is undefended by white pieces and attacked by 0-1 black pieces, often with a white bishop or knight nearby.",
"sae_33665": "An undefended empty square on d7 that is attacked by 4 black pieces.",
"sae_33580": "A white piece on a central square (c3, d1, e3, f3) is attacked by one black piece and defended by at least one white piece.",
"sae_33658": "White's king-side castling square (g1 or f1) is attacked by at least two white pieces, with no black attackers.",
"sae_33661": "A square is attacked by one white piece and one black piece, with white having the option to capture.",
"sae_33635": "The feature detects a king on the back rank (rank 8 for black, rank 1 for white) that is not attacked, with a friendly pawn on the 7th rank (for black) or 2nd rank (for white) blocking its escape.",
"sae_33657": "A pawn or piece is attacked by one white piece and one black piece, with white having the move.",
"sae_33673": "A white king is adjacent to a target square that is attacked by at least one black piece, and the target square is not attacked by any white pieces.",
"sae_33692": "Detects a white pawn on the 4th or 5th rank that is attacked by at least one black piece and defended by at least two white pieces.",
"sae_33737": "A white rook on the back rank is attacked once by black and defended at least once by white.",
"sae_33670": "The feature detects a white pawn on the 2nd, 3rd, or 4th rank, attacked by at least two white pieces and at most one black piece.",
"sae_33778": "Detects a white queen attacking an undefended square on the 5th or 7th rank.",
"sae_33720": "A square on the first rank is attacked by at least one black piece, and is not attacked by any white pieces.",
"sae_33866": "Detects squares on the back rank (1st or 8th) that are attacked by the opponent and are empty.",
"sae_33713": "A square is attacked by white and defended by black, with white having at least as many attackers as black has defenders, and the target square is on the b-file.",
"sae_33940": "The feature detects squares attacked by at least two black pieces and at most one white piece, where the target square is empty.",
"sae_33428": "White king is attacked by a black rook on the same rank or file, with one white piece defending the king.",
"sae_33926": "The feature detects squares attacked by a white pawn, with a preference for squares that are also attacked by a black piece.",
"sae_33840": "A white rook attacks an empty square, which is also attacked by a black rook, with the white king nearby.",
"sae_33766": "The feature detects squares attacked by at least two white pieces and zero or one black pieces, often in the center or near the king.",
"sae_33768": "White king is on the first rank, and a white rook is attacking a square on the first rank, with no black pieces attacking that square.",
"sae_33961": "This feature detects a white rook attacking an empty square on the same rank or file as the black king, with no black pieces attacking the target square.",
"sae_33956": "Contested central or open-file square where the side to move initiates a forcing exchange sequence.",
"sae_34000": "White king is on the first rank and attacked by a black rook.",
"sae_33710": "The feature detects squares on the first rank that are not attacked by any piece, with a white pawn on the second rank and a white king on the third rank.",
"sae_33950": "A white piece (often a queen) attacks a black piece on the 7th or 8th rank, with no black defenders.",
"sae_33906": "The feature detects a pawn on the 2nd or 3rd rank (from its side's perspective) that is attacked by one enemy piece and defended by one friendly piece, with the attacking piece being a pawn.",
"sae_33944": "Detects a pawn promotion to queen on the back rank, or a back-rank mating threat involving a rook and advanced pawn.",
"sae_33982": "A square on the 4th rank (for white) or 5th rank (for black) that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_33991": "The feature detects a target square on the first rank that is attacked by an enemy rook and not defended by a friendly piece.",
"sae_34002": "A white queen or rook attacks a square on the back rank that is defended by a black king or rook.",
"sae_33969": "The feature detects a king on the first rank, with an empty square on the same rank that is not attacked by the opponent, and is a potential castling square or escape square.",
"sae_34031": "White King on its starting square (e1 or d1) with at least one white attacker and no black attackers.",
"sae_33854": "The feature detects a square attacked by at least two white pieces, with one of the attackers being a Queen, and the square is on the 2nd or 7th rank relative to the white king's side.",
"sae_33764": "A white knight on c3, d4, or f3 is attacked by one black piece and defended by at least one white piece.",
"sae_33993": "A white knight on c3/f3/d4/d3/b3 that is attacked by a black piece and defended by at least one white piece.",
"sae_34021": "This feature detects a white rook on the back rank (1st or 8th) that is attacked by a white queen, with the target square being the rook's square.",
"sae_33890": "A white pawn or empty square is attacked by one black piece and defended by two white pieces, with the target square often on the 5th or 6th rank.",
"sae_34044": "Detects squares on the 8th rank that are not attacked by any pieces, especially when the black king is on the 5th rank.",
"sae_33705": "This feature detects a back-rank checkmate threat on the opponent's king, where the king is trapped by its own pawns or pieces and the attacking piece is a bishop.",
"sae_34010": "This feature detects squares on the 7th or 8th rank that are attacked by a black rook, with the white king nearby.",
"sae_34053": "A queen or rook is on a square that is not attacked by the side to move, and is on the 6th, 7th, or 8th rank.",
"sae_34028": "Detects a square that is attacked by at least one enemy piece and is on the back rank or a square that is attacked by at least two enemy pieces.",
"sae_34111": "A square on the 5th, 6th, or 7th rank that is attacked by one white piece and attacked by at most two black pieces.",
"sae_34120": "White rook on the 6th rank attacking an empty square on the 8th rank.",
"sae_34112": "Detects a king on a square that is not attacked by the side to move, but is attacked or could be attacked by the opponent.",
"sae_34072": "A white knight on f3 or c3, or a white bishop on g2 or b2, attacks an empty square on the 5th rank (g5, h5, or a4) with no black attackers.",
"sae_34125": "White's light-squared bishop or knight on c1/b1 is attacked by at least two white pieces and zero black pieces.",
"sae_34134": "This feature detects a black knight on f6 or c6 that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_34240": "White pieces attacking an empty square on the 1st or 2nd rank, with no black attackers.",
"sae_34144": "The feature detects a white pawn on its original square (2nd rank) that is attacked by at least two white pieces and not attacked by any black pieces.",
"sae_34308": "A square on the 7th or 8th rank is attacked by a black piece and not attacked by a white piece.",
"sae_34272": "Detects a king on the second rank, with the target square being a square on the first rank directly below the king, or one of the two squares adjacent to it.",
"sae_34316": "Detects a pawn on the 6th or 7th rank that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_34156": "Detects an empty square on the back rank that is attacked by a black rook and not defended by a white piece, with the white king on the 7th or 8th rank.",
"sae_34291": "The feature detects a white bishop on the a1-h8 diagonal, with the target square a8 being the end of that diagonal, and no pieces blocking the bishop's path to a8.",
"sae_34314": "The feature detects a target square that is attacked by two white pieces and defended by one black piece, with the target square being empty.",
"sae_34213": "The feature detects a white king on the 2nd rank, with a white rook on the same rank, and the target square is an empty square on the 1st rank that is attacked by white and potentially attacked by black.",
"sae_34317": "A square is attacked by at least one black piece, is empty, and is a potential outpost for a white knight.",
"sae_34352": "White's king-side rook on h1 is blocked by its own king, preventing it from castling.",
"sae_34313": "The feature detects empty squares on the 8th rank that are not attacked by white, especially when the black king is on the kingside.",
"sae_34338": "Detects a king on the back rank, with a rook on the same rank, and a black rook attacking a square on the back rank.",
"sae_34324": "The feature detects empty squares on the 8th rank that are not attacked by White, often near the Black king, suggesting potential back-rank mate threats or king escape squares.",
"sae_34372": "The feature detects a square attacked by one white piece and defended by one black piece, where the white attacker is a pawn or a knight.",
"sae_34368": "A white rook or bishop attacks an undefended square, often on an open file/diagonal or near the enemy king.",
"sae_34347": "A white rook on the 7th rank (or 2nd rank for black) attacking an empty square, often supported by other pieces.",
"sae_34373": "This feature detects a white pawn on the 5th rank that is attacked by at most one black piece.",
"sae_34392": "The feature detects a square attacked by exactly one black piece and exactly zero or one white pieces, where the attacking black piece is a rook or bishop.",
"sae_34371": "A pawn or piece is attacked by a white piece and defended by a black piece, or vice versa, on a square that is not on the first or eighth rank.",
"sae_34452": "This feature detects a queen on the target square that is attacked by one white piece and one black piece.",
"sae_34464": "The feature detects a square attacked by at least two black pieces, with no white attackers, and a white pawn on an adjacent square.",
"sae_34163": "The feature detects an undefended enemy knight on a central square (d5, e4, f5) that is attacked by at least one of the opponent's pieces.",
"sae_34509": "Detects a black rook on the 2nd rank, with no white attackers, often in an endgame or simplified position.",
"sae_34403": "The feature detects a black pawn on b7 or b5 attacking an empty square on a6 or a4, respectively, with white having no or one attacker on that square.",
"sae_34427": "This feature detects squares that are attacked by a black rook, but not by any white pieces, and are on the same rank or file as the white king.",
"sae_34541": "This feature detects a white pawn or bishop attacking a black piece on a square where the black piece has no defenders.",
"sae_34453": "The feature detects a king on the back rank (rank 8 for black, rank 1 for white) that is attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_34408": "This feature detects a black piece on a square attacked by white, where the black piece is undefended.",
"sae_34482": "The feature detects a white rook on h1, with the white king on g1, and a white pawn on h2, forming a castled king position, with no immediate threats to the rook.",
"sae_34518": "This feature detects a black piece on a square that is attacked by white and defended by black, with white having at least one more attacker than black has defenders.",
"sae_34551": "A square is attacked by at least one black piece and not attacked by any white piece, and the square is empty.",
"sae_34549": "Detects a king on the back rank or near the back rank, with the target square being a potential escape square that is not attacked by the opponent.",
"sae_34502": "Detects a square attacked by at least one black piece, with no white pieces attacking it, and the target square is empty.",
"sae_34560": "Detects an undefended empty square attacked by at least one black piece, where white has no attackers.",
"sae_34545": "A square is attacked by at least one enemy piece, and not attacked by any friendly pieces.",
"sae_34606": "A white knight attacks an empty square on the 7th rank (or 6th rank for example 5) that is also attacked by a black piece.",
"sae_34562": "The feature detects empty squares on the first rank that are adjacent to the king, especially when the king is castled or on the back rank.",
"sae_34605": "The feature detects a pawn on the 5th or 6th rank that is not attacked by the opponent and is on the same file as a friendly rook.",
"sae_34610": "Detects squares on the 8th rank that are not attacked by white pieces, especially when a black bishop is on the a4-e8 diagonal.",
"sae_34654": "A square attacked by white and black, where white has at least one more attacker than black, and the square is on the 2nd or 3rd rank.",
"sae_34635": "This feature detects a queen on a square that is not attacked by any pieces, where the queen is on the same rank or file as the king of the opposing side.",
"sae_34639": "The feature detects a vacant square attacked by the side to move, with the number of attackers being greater than or equal to the number of defenders.",
"sae_34683": "A black queen on the 5th, 6th, or 7th rank is attacked by at least one black piece and zero white pieces.",
"sae_34626": "The feature detects a king on the 6th or 7th rank, with a friendly king on an adjacent file on the 4th or 5th rank, and no pieces between them.",
"sae_34640": "This feature detects a rook on the back rank or 7th rank (from its own side's perspective) that is undefended by its own side and not attacked by the opponent.",
"sae_34628": "Detects an empty square on the 8th rank that is not attacked by white, with a white rook on the same file on the 1st, 2nd, or 4th rank, and a black king on the 7th or 8th rank.",
"sae_34768": "Detects a pawn on the 6th or 7th rank that is attacked by a black piece and is either undefended or defended by only one white piece.",
"sae_34754": "A square is attacked by one or more black pieces, and is a potential target for a white piece to move to, often to capture or attack.",
"sae_34714": "Detects squares on the back rank or 7th rank that are attacked by a single enemy piece and undefended by friendly pieces.",
"sae_34733": "This feature detects a square that is attacked by one white piece and one or two black pieces, where white can capture a black piece on that square or move a piece to that square to create a threat.",
"sae_34810": "The feature detects a square attacked by at least one black piece, but not by any white pieces.",
"sae_34789": "White pawn on the 7th rank, attacked by white, and not attacked by black.",
"sae_34717": "White rook on the back rank, especially when attacked or defended, or on the second rank.",
"sae_34766": "White has a piece on the target square or can capture a piece on the target square, and the target square is attacked by at least one white piece and at least one black piece.",
"sae_34799": "White King on a1 or h1, with no white pieces on the b-file or g-file, and no white pieces on the 2nd rank.",
"sae_34825": "The feature detects a white rook or queen attacking a square on the back rank or a pawn on the 6th rank, with the target square being undefended by black.",
"sae_34780": "Detects a square on the back rank that is attacked by at least one black piece and is either undefended or defended by an equal number of white pieces.",
"sae_34836": "This feature detects squares attacked by exactly one white piece and exactly one black piece, where the target square is empty or occupied by a white pawn.",
"sae_34852": "This feature detects a black queen on a square attacked by at least one black piece, but not attacked by any white pieces.",
"sae_34721": "Detects a pawn on the 7th rank (for white) or 2nd rank (for black) attacking a square on the 8th/1st rank, where the king is located.",
"sae_34838": "Detects a black bishop on a square that is not attacked by white pieces.",
"sae_34781": "A single white piece attacks an empty square on the 4th, 5th, 6th, or 7th rank, which is defended by 3-4 black pieces.",
"sae_34873": "The feature detects a white pawn attacking an empty square, with no black pieces attacking that square.",
"sae_34902": "Detects a square attacked by exactly one white piece and exactly one black piece, where the square is on the first rank for white.",
"sae_34865": "Detects squares attacked by at least one enemy piece, with no friendly attackers, where the target square is empty.",
"sae_34920": "The feature detects a white pawn that is attacked by at least one white piece and not attacked by any black pieces.",
"sae_34877": "A square attacked by exactly one black piece and zero white pieces, where the target square is empty.",
"sae_34919": "White's pawn on the 5th rank is attacked by at least two black pieces and defended by at least one white piece.",
"sae_34953": "Black rook on the 7th or 8th rank, not attacked by white, and often on the same file as another black rook.",
"sae_34924": "Detects a square attacked by a black rook, where the square is on the back rank or the 7th rank, and is not attacked by white.",
"sae_34967": "Detects squares that are attacked by a black queen and at least one other black piece, and also attacked by at least one white piece.",
"sae_34949": "Detects a pawn poised to promote to queen, or a recently promoted queen, with both kings in the vicinity.",
"sae_34984": "The feature detects squares attacked by Black and defended by White, with a preference for squares on the 5th, 6th, or 7th ranks.",
"sae_34994": "White attacks a black piece on a light square, with the black piece being attacked by at least one other black piece.",
"sae_34985": "Detects an undefended empty square on the 7th rank that is attacked by at least one black piece.",
"sae_34760": "Black's b8-knight or d7/e7-square is attacked by multiple black pieces and zero white pieces, with white to move.",
"sae_34977": "This feature detects a black piece (pawn, knight, or bishop) on a central square (d6, e5, c6, b3, g7, e3) that is attacked by one white piece and defended by one black piece.",
"sae_35029": "A white piece attacks a black piece on a square that is also attacked by at least one black piece.",
"sae_35004": "The feature detects squares that are attacked by an equal number of white and black pieces, with white having at least one attacker and black having at least one attacker.",
"sae_34958": "A back-rank square (a8 or b8) is attacked by at least one black piece, with no white defenders.",
"sae_35043": "White attacks a black rook on the back rank, which is defended by at least two black pieces.",
"sae_35122": "This feature detects a white bishop on a square that is attacked by at least one white piece and at most one black piece.",
"sae_35018": "A white bishop on a central square (d4, e3, e6, f4, h4) that is attacked by at least one black piece and defended by at least one white piece.",
"sae_35133": "A white bishop on a light square (b3, g3, h5) is attacked by a black piece, and white has at least one defender.",
"sae_35115": "The feature detects a king on the 7th or 8th rank, with the target square being a square on the 1st or 2nd rank.",
"sae_34995": "White bishop on b7, c6, d5, e4, f3, g2, or h1, attacking an empty square on the back rank (a8 or b8) with no defenders.",
"sae_35171": "The feature detects a king being attacked by a single enemy piece, with no friendly pieces defending the king.",
"sae_35148": "The feature detects a king on the back rank or an adjacent square, with no white attackers and few black attackers, often in an endgame or simplified position.",
"sae_35028": "The feature detects a white queen attacking an empty square, with the white king on the same rank or file as the queen, and the black king on a different rank/file.",
"sae_35198": "This feature detects a black knight on a square attacked by at least one black piece, but not attacked by any white pieces.",
"sae_35187": "The feature detects squares attacked by a single black piece, especially if it's a rook or queen, and the square is on the back rank or a corner.",
"sae_35264": "White is attacking a black bishop on an open square, which is defended by at least one black piece and not attacked by any white pieces.",
"sae_35180": "Detects empty squares on the 7th or 8th rank that are not attacked by white, often in positions where white has a strong attack or a queen/rook on the back rank.",
"sae_35260": "A white queen attacking an empty square or a black queen on the 7th or 8th rank, with no black defenders.",
"sae_35215": "The feature detects a king on the 7th or 8th rank, with a pawn on the 6th or 7th rank, and a friendly king nearby, indicating a potential king-and-pawn endgame.",
"sae_35308": "The feature detects a square that is attacked by at least one black piece, and is either undefended by white or defended by fewer white pieces than black pieces.",
"sae_35173": "The feature detects a king on the back rank (rank 8 for white, rank 1 for black) that is not attacked by the opponent, but is vulnerable to a back-rank mate if the opponent's queen or rook were to move to the target square.",
"sae_35247": "Detects a square attacked by two black pieces and one white piece, where the white piece is a rook or bishop, and the square is empty.",
"sae_35157": "The feature detects an empty square on the back rank or second rank that is attacked by a white rook, with the white king on the back rank.",
"sae_35210": "This feature detects squares on the back rank or second rank that are attacked by a friendly rook, often with the king on the back rank.",
"sae_35214": "Detects a target square on the 7th or 8th rank that is attacked by a black piece, with a white Queen on the a-file or b-file.",
"sae_35197": "A square attacked by at least two white pieces and zero black pieces, where the square is on the 2nd or 3rd rank from white's perspective.",
"sae_35287": "The feature detects a black piece (bishop or knight) on the 6th, 7th, or 8th rank that is undefended by black and attacked by white.",
"sae_35310": "A white piece (often a Bishop) on a square attacked by at least one black piece, with the target square being a central or kingside square.",
"sae_35326": "A king-side castling square (d1, e1, or f1) that is empty and heavily attacked by white pieces, with no black attackers.",
"sae_35291": "A square attacked by a white pawn, often on the 4th rank, with varying attack/defense counts.",
"sae_35350": "Detects a king on the edge of the board that is attacked by a queen from a distance, with no other pieces defending the king.",
"sae_35323": "The feature detects a king on the back rank, with a pawn on the 7th rank and an empty square on the 2nd rank, often with a rook on the 5th or 6th rank.",
"sae_35380": "The feature detects an undefended back rank square (c1, d1, or e1) that is attacked by at least two white pieces, with the white king on the back rank.",
"sae_35390": "This feature detects squares attacked by at least one black piece, where the target square is empty, and the side to move is white.",
"sae_35419": "A square on the 4th or 5th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_35403": "A rook on its starting square (a1 or h1) that is not attacked and not attacking anything, with no pieces directly in front of it on the second rank.",
"sae_35425": "A white pawn on b2 or e2/e3 is attacked by at least two white pieces, with no black attackers.",
"sae_35447": "A square that is attacked by two white pieces and one black piece, where the target square is empty or contains a pawn.",
"sae_35414": "White's rook on a1 or h1 is undefended by other white pieces and is not attacked by any black pieces.",
"sae_35452": "A square is attacked by a white rook and is on the same rank or file as the black king.",
"sae_35449": "A rook or queen from the side to move contests an open file or rank reaching the back rank.",
"sae_35409": "Detects a king-and-pawn zugzwang endgame where king opposition relative to a passed pawn determines whether the pawn successfully promotes.",
"sae_35507": "A square on the back rank is attacked by one white piece and one black piece, and the square is empty or contains a pawn.",
"sae_35599": "This feature detects squares that are attacked by at least one black piece and are either empty or occupied by a black pawn.",
"sae_35457": "The feature detects a pawn on the 3rd or 4th rank (from white's perspective) that is attacked by an enemy piece and defended by at least one friendly piece, with the exception of Example 1 and 5 where the pawn is undefended.",
"sae_35476": "The feature detects squares on the 2nd or 3rd rank that are attacked by at least one white piece and not attacked by any black pieces.",
"sae_35566": "A white piece (knight or bishop) on a light square (c3, e5, g3) is attacked by a white piece and undefended by black.",
"sae_35634": "The feature detects a white queen attacking a square on the 7th or 8th rank, with no black pieces attacking that square.",
"sae_35602": "Detects squares on the 7th or 8th rank that are adjacent to the black king and are not attacked by white.",
"sae_35639": "The feature detects a black rook on the 6th, 7th, or 8th rank that is attacked by at least two black pieces and zero white pieces.",
"sae_35575": "The feature detects a black bishop on a square that is attacked by no white pieces, but is on a diagonal that is blocked by a white pawn.",
"sae_35711": "Detects a square attacked by at least one black piece, but by no white pieces.",
"sae_35488": "The h8 square is attacked by at least one black piece, and is a potential castling square for the black king.",
"sae_35740": "A pawn on the 2nd rank is attacked by at least two white pieces and not attacked by any black pieces.",
"sae_35667": "A king or rook on the back rank, with no white attackers on that square.",
"sae_35670": "A square on the 7th or 8th rank that is attacked by at least one black piece and is not attacked by any white pieces.",
"sae_35742": "A pawn on the 4th or 5th rank that is attacked by one enemy piece and defended by one friendly piece.",
"sae_35665": "Detects a king on the edge of the board (h-file or 8th rank) that is not attacked by the side to move, but is adjacent to a friendly pawn.",
"sae_35661": "The feature detects a square attacked by a single black piece, where the square is on the 2nd or 5th rank, and the attacking piece is a pawn or knight.",
"sae_35691": "A square is attacked by a black rook, and the white king is on the same rank or file as the rook, but not on the same rank or file as the attacked square.",
"sae_35735": "This feature detects a black knight on an advanced central square (d5, d7, f6, c6) that is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_35737": "A square on the 4th or 5th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_35750": "A pawn on the 2nd rank (or 5th rank for black) is attacked by an enemy piece and defended by a friendly piece, with the attacking piece often being a queen or knight.",
"sae_35758": "A pawn on the 4th or 5th rank, attacked and defended by an equal number of pieces (1-3 each side).",
"sae_35797": "A square is attacked by White and defended by Black, with White having at least as many attackers as Black has defenders.",
"sae_35828": "The feature detects squares on the 4th rank that are attacked by both sides, with white having at least one attacker.",
"sae_35770": "Active king in endgame, either centralised in pawn endings or pursuing the opponent's king in rook endgames.",
"sae_35832": "A white knight attacks a square that is not attacked by any black pieces.",
"sae_35730": "Detects a square on the back rank that is undefended by pawns and is a potential target for a back-rank mate or attack, especially when the enemy king is nearby.",
"sae_35743": "The feature detects a pawn that is attacked by White, defended by White, and is a passed pawn or on the 4th/5th/6th rank.",
"sae_35459": "Detects empty squares on the back rank that are not attacked by white, with a white rook on the a-file and a white king on the h-file.",
"sae_35806": "The feature detects a king on the 7th or 8th rank, with the target square being a corner square on the same rank as the king, and no pieces between the king and the target square.",
"sae_35673": "White pawn on f2/g2 attacked by one or more white pieces, with the white king on g1/h1.",
"sae_35895": "A white pawn is on the 2nd, 3rd, or 4th rank, and is attacked by at least one black piece.",
"sae_35607": "The feature detects a black rook on its starting square (a8 or h8) with no white attackers, and the white queen is not on the same rank or file as the rook.",
"sae_35904": "Detects a square attacked by exactly one black knight, with no white attackers.",
"sae_35899": "A queen or bishop is attacked by one white piece and defended by one black piece, with the white attacker being a queen or bishop.",
"sae_35870": "A square on the 5th rank that is attacked by a black pawn and is either empty or attacked by a white piece.",
"sae_35934": "A white queen is attacked by one black piece and defended by at least one white piece, with the queen on a central or semi-central square (d3, d4, e3, g4, g5, a4).",
"sae_35941": "White's f2 pawn is attacked by at least one black piece and defended by at least two white pieces, with the white King on g1.",
"sae_35860": "The feature detects squares on the 7th or 8th rank that are two squares away from the opponent's king, with no pieces on the target square.",
"sae_35977": "This feature detects a white piece attacking a black piece on a square where the black piece is undefended.",
"sae_35902": "Detects a king safety issue where the king is on the back rank and the target square is a back rank square attacked by a white piece, often a rook or queen, indicating a potential back rank mate or threat.",
"sae_35983": "The feature detects squares on the 8th rank that are not attacked by white pieces, often in positions where white has a rook on the 4th rank.",
"sae_35863": "This feature detects a king on an open file or rank, with no immediate attackers, and often with a queen nearby.",
"sae_36093": "A white rook is attacked by a black piece, and the rook is on the 7th or 8th rank.",
"sae_35996": "This feature detects a square attacked by one white piece and one black piece, where the white piece is a queen or bishop, and the black piece is a pawn or knight.",
"sae_35973": "A white bishop on a dark square attacks a target square on the a-file or c-file, with no black attackers on the target.",
"sae_35994": "A pawn on the second rank (f2 or b2) or third rank (d3) that is attacked by at least two white pieces and not attacked by any black pieces.",
"sae_36026": "A white rook on the first rank is attacked by one black piece and defended by at least one white piece.",
"sae_36001": "The feature detects a piece on the target square that is attacked by at least one opponent's piece and not defended by any of its own pieces.",
"sae_36054": "White Bishop on g2, with white to move, and no black attackers on g2.",
"sae_36072": "Detects squares attacked by a black bishop where white has no attackers.",
"sae_35970": "A square is attacked by both sides, with the side to move having exactly one attacker and the opponent having exactly one attacker.",
"sae_36115": "The feature detects a knight's move to a square adjacent to the enemy king, especially when the king is on the edge of the board.",
"sae_36149": "A square on the 2nd or 3rd rank that is attacked by one white piece and one black piece, with no piece currently on the square.",
"sae_36100": "A king on its original or castled square (e1/e8/g1/g8) in a position with active enemy threats nearby, not necessarily a direct attack.",
"sae_36019": "[polysemantic \u2014 fires on multiple unrelated patterns; needs split]",
"sae_35981": "The feature detects a square attacked by at least one black piece, with no white attackers, where a white pawn could move to defend or capture.",
"sae_36159": "The feature detects a white pawn on h2 or h3 that is undefended by white pieces, often with a black piece nearby.",
"sae_36175": "This feature detects a white pawn on d4 or e4 that is attacked by a black piece and undefended by white.",
"sae_36171": "A square that is attacked by at least one black piece, and attacked by at most one white piece.",
"sae_36184": "White's rook or queen attacks a square on the 6th, 7th, or 8th rank, which is not attacked by a black piece.",
"sae_36249": "The feature detects a king on the 7th or 8th rank, with no immediate attackers, and the side to move is white.",
"sae_35997": "A piece (N or B) is attacked once by the opponent and defended once by the side to move.",
"sae_36070": "White King on the back rank or second rank, attacked by a single black rook or queen, with no or few white defenders.",
"sae_36208": "A square on the back rank (rank 8 for White, rank 1 for Black) that is attacked by at least two enemy pieces and at most one friendly piece.",
"sae_36229": "Detects a black piece on a square that is attacked by a white piece, and the black piece is not defended by any black piece.",
"sae_36217": "A black rook on the 2nd rank, undefended by black pieces, and attacked by no white pieces.",
"sae_36204": "A square contested by at least one white piece and one or more black pieces, commonly arising near a king or in a mating pattern.",
"sae_36298": "White King on the back rank (rank 1 or 2) with at least one white attacker and no black attackers on its square.",
"sae_36261": "Detects a target square on the 7th or 8th rank that is attacked by a white pawn on the 6th rank.",
"sae_36321": "A pawn on its original square (b2 or d4) that is not attacked by any piece.",
"sae_36316": "The feature detects an undefended square attacked by exactly one white piece and exactly one black piece, where the white attacking piece is a pawn.",
"sae_36328": "A square attacked by both sides, where the attacking side has a queen, and the target square is empty.",
"sae_36351": "A square that is attacked by at least 2 white pieces and 0 black pieces, and is on the first or second rank.",
"sae_36398": "An undefended enemy piece on the 6th or 7th rank (for white to move) or 2nd or 3rd rank (for black to move) that is not attacked by the side to move.",
"sae_36404": "Detects empty squares on the 8th rank that are attacked by at least one black piece.",
"sae_36476": "This feature detects a king on the edge of the board, with no immediate attackers, and at least one friendly queen nearby.",
"sae_36441": "The feature detects a black rook on the back rank (a8 or h8) that is undefended and not attacked by white, with the black king on the kingside.",
"sae_36485": "The feature detects a black pawn on the 5th or 6th rank that is attacked by white and defended by black, with white having at least as many attackers as black has defenders.",
"sae_36531": "The feature detects squares where the number of white attackers equals the number of black attackers, and the target square is either empty or occupied by a pawn.",
"sae_36471": "This feature detects squares that are attacked by white pieces, especially when the square is empty and near the white king, or when it is a forward square in the center or on the kingside.",
"sae_36436": "The feature detects a pawn on the 6th rank (for white) or 3rd rank (for black) that is not attacked by the opponent, especially when it is a passed pawn or part of a pawn chain.",
"sae_36549": "A square on the 4th rank is attacked by at least one black piece, and not attacked by any white pieces.",
"sae_36566": "An active black rook on a rank where it cannot be immediately captured, typically the 8th, 7th, or a central rank \u2014 contributing to back-rank pressure or a rook lift.",
"sae_36507": "Detects a black bishop on g7, attacked by no white pieces and defended by one black piece.",
"sae_36579": "White's queen or bishop attacks a black pawn on f7 or h7, which is defended by a black king or queen.",
"sae_36500": "The feature detects an empty square on the back rank (a8 or h8) that is not attacked by white, with a white rook on the opposite side of the board.",
"sae_36563": "Detects squares on the first rank that are attacked by a black rook.",
"sae_36583": "A pawn on the 4th or 5th rank (e4, c5, e5, c6) that is attacked by one white piece and one black piece.",
"sae_36564": "Endgame with advanced queenside pawns and an active knight, where a pawn break or king march decides the outcome.",
"sae_36605": "The feature detects an empty square on the 7th rank (for white) or 2nd rank (for black) that is not attacked by either side, often near the opponent's king.",
"sae_36636": "The feature detects a rook on its starting square (a1 or h1) that is attacked by exactly one friendly piece and no enemy pieces.",
"sae_36606": "The feature detects a king on the 7th or 8th rank, with a rook on the same rank, and the target square is an empty square on the same rank as the king and rook, but on the opposite side of the king from the rook.",
"sae_36685": "King manoeuvring in a pawn endgame, exploiting key squares and opposition to infiltrate or restrict the opposing king.",
"sae_36624": "A white pawn or knight attacks an empty square, often on the 3rd or 4th rank, with no black attackers.",
"sae_36705": "A square is attacked by at least one black piece, and no white pieces, and is on the b-file or a square near the black king.",
"sae_36735": "A white king is attacking an empty square, which is also attacked by a white pawn, and the square is adjacent to a black king.",
"sae_36608": "A square is attacked by one white piece and one black piece, with the target square being empty or occupied by a pawn or minor piece.",
"sae_36669": "The feature detects a white pawn on the 5th rank that can capture a black piece on an adjacent file, or advance to the 6th rank, with the target square being undefended by white.",
"sae_36634": "The feature detects a king on the back rank, with the target square being a back-rank square that is not attacked by white and is either empty or attacked by black.",
"sae_36653": "The feature detects a rook on the same rank or file as the enemy king, with the target square being the corner of that rank/file, and no pieces between the rook and the target square.",
"sae_36738": "This feature detects a black bishop on its starting square (c8, f8, g7) that is currently undefended by white pieces.",
"sae_36710": "This feature detects a queen attacking an undefended square on the 7th or 8th rank, often near the enemy king.",
"sae_36741": "White rook actively cutting off the black king in a rook endgame, controlling key ranks or files to restrict king movement.",
"sae_36429": "White rook on the 7th rank attacking an empty square on the 8th rank, with the black king on the 8th rank.",
"sae_36730": "The feature detects a pawn on the 3rd, 4th, or 5th rank that is attacked by at least one enemy piece and defended by zero or one friendly piece.",
"sae_36751": "A pawn on the 2nd or 4th rank (from its side's perspective) that is attacked by an enemy piece and defended by one of its own pieces.",
"sae_36742": "White attacks a pawn or empty square on the 4th or 5th rank, with at least one white attacker and at least one black attacker.",
"sae_36835": "A white piece attacks a black king-side pawn or empty square on the 7th or 8th rank, which is also attacked by a black piece.",
"sae_36750": "White King is on the same rank or file as the Black King, with no pieces in between.",
"sae_36727": "Detects a central empty square (d4, d5, e3, e4, e5) that is attacked by white at least twice and by black at most twice, with white having at least one more attacker than black.",
"sae_36807": "A square attacked by at least two black pieces, with no white attackers, and no piece currently on the square.",
"sae_36760": "A knight (or pawn) that is the key attacking piece in a forced mate-in-one, covering a critical escape square.",
"sae_36824": "The feature detects a white rook attacking an empty square on the 7th or 8th rank, or a white queen attacking an empty square on the 7th or 8th rank, with no black attackers.",
"sae_36765": "Detects an empty square on the back rank that is not attacked by the side to move, and is either undefended or attacked by the opponent.",
"sae_36567": "White Queen on d1, attacked only by White pieces, with at least one White Rook or Bishop also on the d-file.",
"sae_36787": "Detects a square on the first two ranks that is attacked by a white rook or queen and also attacked by a black piece.",
"sae_36857": "A square is attacked by an enemy piece and either undefended or defended by only one friendly piece.",
"sae_36771": "The feature detects a pawn on f2 or g2, attacked by exactly one white piece and zero black pieces.",
"sae_36833": "The feature detects a white rook on its starting square (a1, c1, d1, or e1) that is not attacked by black pieces.",
"sae_36858": "A white pawn on the 2nd, 3rd, or 4th rank, attacked by at least one white piece and not attacked by any black pieces.",
"sae_36870": "This feature detects a square that is attacked by both sides, with the attacking piece being a rook for the side to move, and the target square being on the 3rd or 5th rank.",
"sae_36964": "This feature detects a white pawn on the 4th rank, attacking an empty square on the 5th rank, with no black pawns on the 5th rank.",
"sae_37002": "This feature detects a king on the back rank that is not attacked by the opponent, or a friendly rook on the back rank that is heavily defended.",
"sae_37097": "This feature detects squares on the 7th or 8th rank that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_37081": "White rook attacks a square on the same rank as the white king, with no black pieces between them.",
"sae_37005": "This feature detects a bishop that is attacked by a white piece and not defended by a black piece.",
"sae_36958": "This feature detects the king being attacked by an enemy piece, with at least one friendly piece also attacking the king.",
"sae_37034": "The feature detects squares on the first two ranks attacked by at least one white piece and not attacked by any black pieces, often near the white king.",
"sae_37029": "The feature detects an undefended empty square that is attacked by at least two white pieces and is on the same rank or file as the white king.",
"sae_36901": "Detects a black pawn on the 3rd or 4th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_37003": "The feature detects a black rook on a8, with no white attackers, and a white knight on b1 or c3, often with a white bishop on c4 or d3, suggesting a potential future attack on the kingside.",
"sae_36907": "This feature detects a white rook attacking an empty square or a black pawn, with no black attackers, especially on the edge of the board or near the king.",
"sae_37106": "White rook on the back ranks in a position with a mating attack or deflection tactic.",
"sae_37115": "The feature detects a square attacked by the opponent, where the attacking piece is a knight.",
"sae_37175": "Detects squares attacked by a white rook, especially when the white king is nearby and the square is empty or occupied by the white king.",
"sae_37099": "This feature detects a white pawn on the 2nd rank attacking a square on the 4th rank, often a pawn, with no black attackers on the pawn.",
"sae_37118": "This feature detects a square that is attacked by the opponent and defended by the side to move, with the target square being a piece or an empty square.",
"sae_37224": "This feature detects an empty square on the back rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_37189": "The king is on its original square (e1, g1, h1, or b1) and is attacked by at least one friendly piece, indicating a potential castling opportunity or a king safety check.",
"sae_37204": "The feature detects a pawn on the 2nd or 3rd rank that is attacked by an enemy piece and defended by at least one friendly piece.",
"sae_36874": "This feature detects a white pawn attacking a square, especially when the square is empty or occupied by an enemy piece, and sometimes when it's also attacked by a black piece.",
"sae_37185": "Detects the black king or rook on the back rank, with no white attackers and at least one black attacker, indicating a safe back rank for black.",
"sae_37229": "The feature detects a pawn on h3 (or a3) that is attacked by a white piece and defended by a black piece, or an empty h3 (or a3) square attacked by a white piece and defended by a black piece.",
"sae_37277": "The feature detects a white pawn on the 3rd or 4th rank that is attacked by at least one black piece and defended by at most one white piece.",
"sae_37292": "This feature detects a rook attacking an empty square on the back rank or a square adjacent to the king on the back rank, with no opposing pieces attacking that square.",
"sae_37276": "This feature detects a white queen on the 6th, 7th, or 8th rank, attacking a king on the back rank, with no black pieces attacking the queen.",
"sae_37241": "The feature detects an undefended h8 square, often with a black king on g8, and no white pieces attacking h8.",
"sae_37428": "This feature detects a white pawn on the 5th rank that is attacked by at least one white piece and zero black pieces.",
"sae_37346": "The feature detects a king on the back rank (or a square adjacent to it) that is vulnerable to a back-rank mate or a similar attack, often involving a queen or rook.",
"sae_37407": "The feature detects a white rook attacking an empty square on the 3rd or 5th rank, with no black attackers.",
"sae_37399": "The feature detects squares on the first two ranks that are attacked by at least one black queen, with no white attackers.",
"sae_37319": "White king on g1 or c1, with at least one white attacker and no black attackers, indicating a safe king position.",
"sae_37403": "Detects squares on the 7th or 8th rank that are attacked by at least one black piece and not attacked by any white pieces.",
"sae_37475": "Black's king-side castling square (g8 or h8) is attacked by at least two black pieces, with no white attackers.",
"sae_37303": "This feature detects a black piece on the d-file (or b7) that is attacked by one white piece and defended by one black piece.",
"sae_37409": "A white piece is attacking an empty square, which is also attacked by a black piece, and the square is on the 3rd or 6th rank.",
"sae_37431": "The feature detects a safe square on the 3rd or 4th rank, attacked by at least one white piece, often a pawn or knight, and not attacked by any black pieces.",
"sae_37419": "This feature detects a white knight or pawn on a central square (c3, c4, d4, d5, f3) or h5, which is attacked by at least one black piece and defended by at least two white pieces.",
"sae_37444": "This feature detects squares on the 6th, 7th, or 8th ranks that are not attacked by white pieces, especially when they are on the a- or h-files.",
"sae_37367": "This feature detects squares on the 8th rank that are attacked by a black queen on c1, with a black king on d2 and a white king on a1.",
"sae_37555": "This feature detects squares that are attacked by Black and are on the back rank, especially when the target is a king or rook.",
"sae_37240": "This feature detects squares on the first rank (a1, b1, c1) or second rank (a2, a3) that are attacked by at least two white pieces and no black pieces, often involving a pawn on the second rank and a knight on the third rank.",
"sae_37477": "The feature detects a bishop on a square that is attacked by at least one black piece, with white having at least as many attackers as black.",
"sae_37506": "The feature detects a vacant square on the back rank that is not attacked by white pieces, often in the vicinity of the black king.",
"sae_37582": "This feature detects a white pawn on the 3rd or 4th rank that is either undefended or defended by white and attacked by black.",
"sae_37531": "This feature detects a king being attacked by exactly one piece, with the target square being the king's current square.",
"sae_37592": "Detects squares that are attacked by Black pieces, particularly those on the back rank or near the king, and are not attacked by White pieces.",
"sae_37488": "The feature detects squares that are attacked by exactly one white piece and exactly one black piece, with a preference for squares near the black king.",
"sae_37594": "The feature detects a pawn on the 7th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_37391": "This feature detects squares on the 7th or 8th rank that are attacked by Black pieces and not attacked by White pieces, especially when the White king is castled or near the back rank.",
"sae_37591": "This feature detects squares attacked by white pieces, especially when the target square is empty or occupied by a black pawn, and the white king is not on the target square.",
"sae_37375": "This feature detects a white pawn on the 4th or 5th rank that is attacked by white pieces and not attacked by black pieces.",
"sae_37616": "The feature detects a square that is attacked by at least two enemy pieces and at most one friendly piece, with the target square being empty or occupied by an enemy knight.",
"sae_37507": "The feature detects a king on the same rank as an enemy rook or queen, with the target square being a square on that rank, between the king and the enemy rook/queen, that is not attacked by the enemy rook/queen.",
"sae_37651": "White's bishop or pawn attacks a square on the 6th, 7th, or 8th rank, with no black attackers.",
"sae_37617": "This feature detects a queen attacking an undefended square on the 6th or 7th rank, often near the enemy king.",
"sae_37534": "This feature detects a rook on the second rank (from its own side) that can move to a square on the first rank (from its own side) that is not attacked by the opponent.",
"sae_37717": "The feature detects squares on the 5th rank that are attacked by a black pawn on the 6th rank, especially when the white king is on the 8th rank.",
"sae_37633": "This feature detects a white queen or rook attacking an empty square on the back rank, with the white king nearby.",
"sae_37659": "This feature detects a queen on a square that is either undefended or defended by an opponent's piece, with the queen being attacked by an opponent's piece.",
"sae_37667": "The feature detects squares that are attacked by the opponent's king, especially when the king is on the back rank or in the corner.",
"sae_37754": "A white pawn on the 4th or 5th rank, attacked by white pieces and not attacked by black pieces.",
"sae_37788": "The feature detects a square on the 4th rank, on an outer file (a, b, g, or h), that is attacked by one white piece and one black piece, with white having the next move.",
"sae_37676": "A rook or queen attacks an empty square on the back rank or a square adjacent to the king on the back rank.",
"sae_37725": "The feature detects a black rook on the back rank that is attacked by a white piece, often with other black pieces on the back rank.",
"sae_37609": "A white bishop on the 3rd rank in an endgame, often on the same diagonal as the white king.",
"sae_37858": "The feature detects a square that is attacked by at least one black piece, but not by any white pieces.",
"sae_37831": "This feature detects a Queen on a square that is attacked by at least one of its own pieces and at most one enemy piece.",
"sae_37766": "This feature detects a white knight on a central square (d2, f3, g1, g3) that is attacked by at least one white piece and not attacked by any black pieces.",
"sae_37854": "The feature detects empty squares on the first two ranks that are attacked by a white rook, with no other pieces on those squares.",
"sae_37703": "The feature detects a white pawn on the 7th rank, with the target square being the 8th rank, often a promotion square, and the white king is nearby.",
"sae_37755": "The feature detects a black pawn on the 7th rank (or 6th for black) that is attacked by a black piece and not attacked by a white piece.",
"sae_37364": "The feature detects a white knight on the 2nd or 3rd rank, often in a central or semi-central position, with few or no attackers.",
"sae_37921": "This feature detects empty squares on the 4th rank that are attacked by White and potentially defended by Black.",
"sae_38074": "This feature detects a pawn on the 6th rank that is not attacked by the side to move.",
"sae_37988": "The feature detects a white rook on its starting square (f1, d1, b1) that is attacked by at least one white piece and not attacked by any black pieces.",
"sae_37906": "This feature detects squares on the back rank (rank 1 or 8) or the second rank (rank 2 or 7) that are attacked by an enemy piece, especially if the square is empty or contains a pawn.",
"sae_37969": "This feature detects a king's flight square (empty, unattacked by opponent, and attacked by own side) on the back rank, or a king's flight square (empty, attacked by both sides) on the 7th rank.",
"sae_38061": "The feature detects a white pawn on the 2nd or 3rd rank that is attacked by at least one white piece and not attacked by any black pieces.",
"sae_38112": "The feature detects a pawn on the 3rd or 4th rank (from the perspective of the side to move) that is attacked by an enemy piece, especially if it is a passed pawn or part of a pawn chain.",
"sae_38077": "White Queen on the 2nd rank, attacked by at least one white piece and no black pieces.",
"sae_38029": "The feature detects an empty square on the first two ranks, attacked by at least one friendly rook, and not attacked by any enemy pieces.",
"sae_38084": "The feature detects squares on the back rank (rank 8 for white, rank 1 for black) that are undefended by pawns and are potential targets for a rook or queen.",
"sae_38146": "King opposition or king centralisation in a pawn endgame, where the active king steps into a contested zone.",
"sae_38134": "A white pawn on the 2nd or 3rd rank, potentially attacked or defended, but not immediately captured.",
"sae_38235": "The feature detects a white pawn on c3 or d3, with the target square being b4 or c4 respectively, and no black pawn on the target square.",
"sae_38262": "A white rook attacks an empty square on the back rank, with no black attackers.",
"sae_38086": "This feature detects squares on the back rank or 7th rank that are attacked by the opponent and undefended by the side to move.",
"sae_38248": "Detects empty squares on the 8th rank that are not attacked by the opponent, especially when the king is on the 7th rank.",
"sae_38168": "The feature detects a pawn on the 2nd, 3rd, or 4th rank that is either undefended or attacked by an opponent's piece, making it a potential target for capture.",
"sae_38110": "This feature detects squares that are attacked by a white rook on the 5th rank, especially if the rook is on a file from d to h.",
"sae_38214": "The feature detects a black pawn on the 5th, 6th, or 7th rank that is not attacked by white pieces.",
"sae_37918": "This feature detects squares on the 5th, 6th, or 7th rank that are attacked by a black pawn, or squares on the 5th rank attacked by a white pawn.",
"sae_38121": "This feature detects an undefended back rank square (a8 or h8) that is attacked by at least one black piece, with the black king on the back rank.",
"sae_38263": "This feature detects a white pawn on the 5th rank, with an empty square in front of it, on the f or g file, often supported by other white pieces.",
"sae_38269": "This feature detects a square that is attacked by one white piece and one black piece, where white has a piece on the target square or can capture a piece on the target square.",
"sae_38198": "The feature detects a rook on the 7th or 8th rank, attacking a square on the back rank, with the king of the same color on the back rank.",
"sae_38282": "Black king on g8 or c8, attacked by at least one black piece, with no white attackers.",
"sae_38209": "Detects an empty square on the back rank (rank 1 for white, rank 8 for black) that is attacked by at least two friendly pieces, often for king safety or rook activation.",
"sae_38268": "This feature detects squares on the second rank (from White's perspective) that are attacked by a Black pawn on the a-file.",
"sae_38371": "A square on the 7th rank is attacked by a black rook, and is not attacked by white.",
"sae_38244": "White's king-side rook on h1 is blocked by a pawn on h2, with the king on g1 and a bishop on f1.",
"sae_38219": "White's rook on the back rank (1st rank) is attacked by no black pieces and defended by 0-3 white pieces.",
"sae_38266": "This feature detects squares attacked by white pieces, where white has at least two attackers and black has fewer attackers than white.",
"sae_38319": "This feature detects a king on the back rank, with a rook on the same rank, and a pawn on the second rank, where the target square is on the back rank.",
"sae_38491": "Active white knight in or near the centre that is involved in a tactical exchange or outpost contest against black pieces.",
"sae_38392": "This feature detects a king on the back rank, especially when it is attacked by a rook and/or is on a square that is attacked by a rook.",
"sae_38504": "White's knight attacks a square that is not attacked by any black piece.",
"sae_38478": "The feature detects a king on the 6th or 7th rank, with a rook on the same rank, and a target square on the 7th or 8th rank that is attacked by an enemy rook or bishop.",
"sae_38506": "The feature detects a pawn on g2/g7 that is attacked by a knight and defended by a queen, with the target square being h3/h6.",
"sae_38406": "A white pawn on the 4th rank is under pressure with the advance square as the key target, though attack and defence conditions are not always present.",
"sae_38462": "The feature detects a black piece on the 7th or 8th rank that is attacked by at least one black piece and not attacked by any white piece.",
"sae_38535": "This feature detects a white pawn on the 3rd or 4th rank that is attacked by at least two white pieces and no black pieces.",
"sae_38470": "White rook attacks an empty square on the 7th or 8th rank, with no black pieces attacking that square.",
"sae_38547": "This feature detects a square attacked by a black rook, where the white king is nearby and potentially vulnerable.",
"sae_38509": "The feature detects squares attacked by at least two white pieces and zero or one black pieces, often on the king-side or center.",
"sae_38425": "The feature detects an undefended pawn on d2 or e2, attacked by at least two white pieces, with no black attackers.",
"sae_38552": "The feature detects squares on the 7th or 8th rank that are attacked by black pieces and not by white pieces, often near the black king.",
"sae_38449": "A black bishop is attacked by a white pawn, and the bishop is not defended by any white pieces.",
"sae_38557": "The feature detects a pawn on the 2nd rank (a2, c2, h2) attacked by at least one friendly piece, with no enemy attackers.",
"sae_38554": "The feature detects an empty square on the first rank (b1 or c1) that is attacked by at least two white pieces and zero black pieces, often indicating a potential castling square or a safe haven for the king.",
"sae_38341": "This feature detects a white pawn on the b-file, on the 2nd, 3rd, or 4th rank, that is either undefended or defended by white pieces.",
"sae_38578": "This feature detects a white rook attacking an empty square on the back rank or a square on the a-file.",
"sae_38683": "A square on the 5th or 6th rank is attacked by at least two black pieces and not attacked by any white pieces.",
"sae_38670": "This feature detects the squares on the first rank that are attacked by a white rook, especially when the rook is on the first rank.",
"sae_38687": "This feature detects empty squares on the 8th rank, especially those near the enemy king, that are not attacked by white pieces.",
"sae_38655": "Detects empty squares on the back rank that are not attacked by any piece, with a white king nearby and a white rook on the 7th rank.",
"sae_38594": "Detects empty squares on the 6th, 7th, or 8th rank that are attacked by a black knight or rook.",
"sae_38690": "The feature detects squares attacked by a black knight, especially when the square is empty and not attacked by white.",
"sae_38830": "This feature detects squares that are attacked by a black pawn and are on the 6th, 7th, or 8th rank.",
"sae_38826": "The feature detects a king or rook on its starting square, or a queen on a central square, that is not attacked by the opponent.",
"sae_38767": "This feature detects a square that is attacked by White and defended by Black, where White has at least one more attacker than Black has defenders.",
"sae_38845": "The feature detects squares on the a-file or b-file that are attacked by a black piece, especially when the target square is empty.",
"sae_38719": "The feature detects a pawn on the 4th rank that is attacked by an enemy pawn and defended by a friendly pawn, with the side to move being the one whose pawn is on the 4th rank.",
"sae_38149": "A king is on the back rank, and there is an empty square on the back rank that is not attacked by the opponent.",
"sae_38799": "White king on g1 or h1, with a white rook on h1 or a white pawn on g2, and no black attackers on h1.",
"sae_38778": "Detects a vacant square on the 2nd or 7th rank that is attacked by white and not attacked by black.",
"sae_38858": "Detects empty squares on the 7th or 8th rank that are attacked by an enemy piece, especially if the king is nearby.",
"sae_38876": "The feature detects a king's pawn on the 7th rank, with the king on the 6th rank, supporting a pawn push to the 8th rank.",
"sae_38866": "The feature detects squares where white has fewer attackers than black, especially when white has only one attacker.",
"sae_38658": "This feature detects squares that are attacked by a queen and are on the same rank or file as the king, but not necessarily directly attacking the king.",
"sae_38810": "The feature detects a black pawn on g6 or h7 that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_38919": "The feature detects squares attacked by at least one black piece, with no white attackers, and where the target square is empty.",
"sae_38902": "This feature detects an undefended black knight on the 3rd or 6th rank, especially when it is attacked by a white piece.",
"sae_38909": "This feature detects a target square on the back rank or h-file that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_38960": "This feature detects a rook on the back rank (rank 1 or 8) that is either attacked by an enemy piece or is the target of a discovered attack.",
"sae_38745": "A square on the first rank is attacked by a black piece and defended by a white king, with no other white defenders.",
"sae_38821": "A black pawn on the 5th rank is attacked by a black piece, with the target square being a pawn or empty.",
"sae_38953": "This feature detects empty squares on the first rank (e1, d1, f1) that are attacked by at least one white piece and no black pieces, often with the king on the first rank.",
"sae_38873": "Detects an undefended square on the back rank (a8 or h8) or a king on the back rank (g8 or h7) that is attacked by at least one black piece, with no white defenders.",
"sae_39042": "Detects a white piece attacking an empty square on the back rank or second rank, often with the white king nearby.",
"sae_39044": "The feature detects squares that are not attacked by either side, with a preference for squares on the first two ranks, especially for the king to move to.",
"sae_39010": "This feature detects a white queen attacking a back-rank square (rank 8) that is undefended by black pieces.",
"sae_39039": "The feature detects a white piece (often a pawn) attacking a square that is also attacked by a black piece, with the target square being empty or occupied by a black piece.",
"sae_39062": "This feature detects squares on the a-file or 7th/8th ranks that are attacked by a black rook and undefended by white.",
"sae_39094": "This feature detects a queen attacking an empty square on the same rank or file as the enemy king, with no pieces between them.",
"sae_38983": "The feature detects a white rook on its original square (a1, h1, or f1) that is either undefended or defended by white pieces, with no black attackers.",
"sae_38969": "A white piece attacks an undefended black piece on an open square, winning material \u2014 knight attacks also qualify.",
"sae_39077": "This feature detects a rook on the 8th rank, with the king on the 7th rank, and the target square is on the 8th rank, indicating a potential back-rank mate or skewer.",
"sae_38844": "White's queen or rook attacks a pawn on the 6th or 7th rank, with no black defenders.",
"sae_39127": "Detects squares on the first rank that are undefended by the side to move, and are on the same file or adjacent file to the king.",
"sae_38974": "White King safety: a white piece (often a pawn) defends a square adjacent to the white King, which is otherwise exposed.",
"sae_39118": "The feature detects a king on the back rank or corner, with no friendly pieces protecting it, and the target square is a back rank or corner square.",
"sae_39109": "The feature detects a black rook on the a-file, with the white king on the 6th or 7th rank, and the target square being a square on the 8th rank.",
"sae_39002": "The feature detects a white pawn on the 2nd, 3rd, or 4th rank, attacked by a white piece, and not attacked by a black piece.",
"sae_39134": "The feature detects a white pawn on the 2nd rank that is attacked by white pieces and not attacked by black pieces.",
"sae_39119": "The feature detects undefended enemy pawns on the 7th rank, especially those on the kingside.",
"sae_39154": "Detects squares on the 8th rank that are not attacked by white pieces, especially when the black king is nearby.",
"sae_39072": "The feature detects a white pawn on the 4th rank that is attacked by a black pawn and defended by a white piece, often a knight.",
"sae_38814": "The feature detects a white pawn on the h-file (or g2) that is either undefended or defended by white, and is not attacked by black.",
"sae_39246": "This feature detects squares attacked by a white bishop on d4, especially when the target square is empty.",
"sae_37112": "Detects a rook on the 7th rank, with the enemy king on the 8th rank, and the friendly king nearby.",
"sae_37182": "Detects squares attacked by a black bishop on d5.",
"sae_39174": "The feature detects a pawn on the 4th or 5th rank that is attacked by the side to move, with the number of attackers being equal to or less than the number of defenders.",
"sae_39228": "A king is attacked by a queen, and the target square is an empty square on the same rank/file/diagonal as the king and queen, where the king can move to block the attack.",
"sae_39078": "The feature detects a square attacked by at least two black pieces, with at most one white attacker, and the target square is often on the 4th or 5th rank.",
"sae_39215": "The feature detects the king's proximity to the target square, especially when the king is on the same rank or file as the target.",
"sae_37218": "Detects an empty square on the back rank that is not attacked by the side to move, often with the king of the side to move nearby.",
"sae_39269": "The feature detects a pawn on a2 or h2 that is attacked only by white pieces, with no black attackers.",
"sae_39316": "The feature detects a white piece attacking a black piece on a central square, where the black piece is undefended or underdefended.",
"sae_37494": "Detects a white rook on the back rank that is undefended by white pieces and attacked by black pieces, or a white queen on the back rank that is undefended by white pieces.",
"sae_39396": "A white bishop attacking an empty square on the 3rd or 4th rank, with no black pieces attacking that square.",
"sae_39407": "This feature detects a white rook on its starting square (1st rank) that is attacked by at least one black piece.",
"sae_39176": "Black's kingside rook is on h8, and White has a knight on f3 or g5, or a bishop on g2 or f1, or a queen on d1, e1, or f1, or a pawn on g2, g3, h2, or h3, or a king on g1 or h1, or a rook on h1",
"sae_39475": "The feature detects a square that is attacked by at least two white pieces and only one black piece, with the target square being empty or occupied by a black pawn.",
"sae_39513": "This feature detects a white piece (or empty square) on the 2nd or 3rd rank that is attacked by at least two white pieces and zero or one black pieces.",
"sae_37515": "A square on the 2nd or 3rd rank is attacked by at least two friendly pieces and not attacked by any enemy pieces.",
"sae_37505": "A white queen or knight attacks an empty square on the 8th rank, often a back rank mate threat or a discovered attack.",
"sae_39516": "Two white knights cooperate to fork or invade, with at least one delivering a decisive tactical blow against an exposed king or undefended piece.",
"sae_39386": "This feature detects a white piece (especially a queen or rook) attacking a square on the opponent's back rank (7th or 8th) that is either empty or occupied by an undefended black piece.",
"sae_39521": "A white rook on the 2nd, 4th, 5th, 6th, or 7th rank, attacking a piece on the same rank, with no other white attackers on the target square.",
"sae_39184": "A pawn on the 3rd rank (a3 or h3) that is attacked by an enemy pawn and defended by a friendly piece.",
"sae_39421": "White's pieces are attacking an undefended square, often a pawn, on the 4th, 5th, 7th, or 8th rank.",
"sae_39500": "A white rook or queen is attacking a square on the back rank or 7th rank, which is not defended by white, and the black king is on the back rank.",
"sae_39087": "Detects a target square on the back rank (1st or 8th) that is attacked by a black rook and not attacked by white.",
"sae_39537": "This feature detects a black piece on a square that is not attacked by white, with white to move.",
"sae_39544": "The feature detects a square attacked by one white piece and one or two black pieces, often a pawn, where the target square is empty.",
"sae_37961": "A white rook on its original square (1st rank) with no white attackers, often on an open file or with potential for future activity.",
"sae_39588": "This feature detects a king on the first rank, or a king on the second rank with a pawn on the first rank, that is not attacked by the opponent.",
"sae_39357": "The feature detects a black rook on the back rank (1st or 8th rank from white's perspective) that is undefended by white pieces, and the target square is on the back rank.",
"sae_37808": "The feature detects a king-side castling opportunity for White, specifically targeting f1 (or d1 in one case) with multiple white attackers and no black attackers.",
"sae_39596": "Black's back rank (1st rank for white) is attacked by multiple black pieces, especially when the king is present or castled.",
"sae_37835": "A square on the 6th, 7th, or 8th rank that is attacked by at least one black piece and not attacked by any white pieces.",
"sae_39618": "The feature detects a white rook attacking an empty square on the opponent's side of the board (ranks 5-8), with no black pieces attacking that square.",
"sae_39548": "The feature detects an empty square on the back rank that is not attacked by white, often near the king, and is a potential escape square or a square for a king to move to.",
"sae_39621": "The feature detects squares that are attacked by white and undefended by black, often in the opponent's territory or near the king.",
"sae_39349": "This feature detects a white rook or queen attacking an empty square on the h-file (h1 or h2) with no black attackers.",
"sae_39626": "This feature detects squares that are attacked by the side to move, especially when the square is empty and has multiple attackers, or when the square is a corner square and the king is far away.",
"sae_39593": "The feature detects a white pawn on d2 or e2, attacked only by white pieces, with at least two white attackers.",
"sae_37962": "A pawn on the 6th rank (or a square on the 6th rank) is attacked by a black piece and not defended by a white piece.",
"sae_39639": "This feature detects squares attacked by both sides, with white having at least as many attackers as black, often in the center or on the queenside.",
"sae_38089": "Detects a pawn on the 2nd rank that is not attacked by the opponent, often a pawn on b2 or c2.",
"sae_39672": "A square is attacked by a white piece and undefended by a black piece, or attacked by a black piece and undefended by a white piece, especially on the kingside.",
"sae_39164": "A white queen on c1 attacking a square on the h1-a8 diagonal, with a black bishop on e5 blocking the attack.",
"sae_38030": "A white pawn on the 4th rank is attacking a square on the 5th or 6th rank, which is also attacked by at least one other white piece and only one black piece.",
"sae_38091": "A white queen is attacked by a black piece, and the queen is on the second or third rank, often on the a, b, or d file.",
"sae_39197": "The feature detects a square that is attacked by at least two white pieces and at most two black pieces, with the target square being empty.",
"sae_39747": "This feature detects empty squares on the first rank that are attacked by white pieces, especially when the white king is also on the first rank.",
"sae_39756": "The feature detects a white piece attacking a black piece on a square where the black piece is the only defender.",
"sae_39673": "The feature detects a white pawn on g2 or f2, or an empty square on g4 or f4, that is attacked by both sides, with white having at least one attacker.",
"sae_39768": "White's king's rook is on h1, and the g-file is open or semi-open, with no white pawns on g2 or g3.",
"sae_39678": "The feature detects a white-controlled square in the center (d4, d5, e4, e5) or near-center (c5, d6) that is attacked by at least one black piece, where white has at least twice as many attackers as black.",
"sae_39736": "This feature detects squares on the back rank (7th or 8th) that are attacked by at least one enemy piece and not defended by any friendly pieces.",
"sae_39813": "This feature detects empty squares on the first rank that are not attacked by white pieces, especially when the white king is on the first rank.",
"sae_39772": "This feature detects a white piece attacking a black piece on a central square (d4, e4, d5, e5) or a square on the 4th, 5th, or 6th rank, with no black attackers on the target square.",
"sae_39906": "The feature detects the h8 square being attacked by a black piece, especially when it's the king's castling square or the king is on h8.",
"sae_39856": "The feature detects squares that are attacked by both a white and a black piece, especially when the target square is occupied by a piece.",
"sae_38294": "A white pawn on the 2nd rank is attacked by at least two white pieces, with no black attackers.",
"sae_39634": "The feature detects a white queen attacking an empty square on the 2nd or 3rd rank, with no black attackers on that square.",
"sae_39956": "The feature detects a target square that is attacked by a black queen, with the black king nearby, and the white king also nearby.",
"sae_39836": "Detects squares attacked by a queen that are also attacked by a friendly king, or squares attacked by a queen that are also attacked by a friendly rook.",
"sae_39366": "This feature detects squares on the back rank or 7th rank that are attacked by at least one white piece and not attacked by any black pieces.",
"sae_39738": "This feature detects squares attacked by at least one white queen, especially those on the back rank or near the opponent's king.",
"sae_40011": "The feature detects a square attacked twice by white and once by black, where white has a pawn on an adjacent file and a knight attacking the square.",
"sae_40020": "This feature detects empty squares on the back rank that are attacked by an enemy queen or rook, especially when the king is also on the back rank.",
"sae_40049": "Detects a square attacked by a pawn and defended by a knight, or vice-versa, on the 3rd or 4th rank.",
"sae_38303": "A white knight on a central or kingside square, often undefended, with no black attackers, and the white king nearby.",
"sae_38338": "A white pawn on the 2nd, 4th, or 5th rank is attacked by a black piece and defended by a white piece, with the white king often nearby.",
"sae_38357": "A white piece attacks a black piece on the 7th or 8th rank, with no black defenders.",
"sae_39938": "This feature detects squares that are attacked by White and defended by Black, with a preference for squares that are attacked by White at least as many times as they are defended by Black.",
"sae_40052": "This feature detects squares on the back rank or h-file that are attacked by a black queen and not defended by white.",
"sae_40063": "The feature detects a white piece attacking a square that is also attacked by a black piece, with the target square being on the 3rd rank.",
"sae_40054": "The feature detects a king on the back rank or a square one step away from the back rank, with no immediate attackers.",
"sae_40117": "The feature detects a white piece attacking a square on the 7th or 8th rank, especially when the square is undefended by black.",
"sae_39648": "This feature detects an undefended back rank square (a8 or h8) that is attacked by at least one enemy piece, often a rook.",
"sae_39726": "This feature detects squares on the first rank that are attacked by an enemy rook and defended by a friendly rook.",
"sae_40167": "The feature detects a white bishop on g2 or b2, attacked by no black pieces, and defended by at least one white piece.",
"sae_40082": "This feature detects squares attacked by a single black piece and defended by a single white piece, often with a white pawn or knight involved in the defense.",
"sae_40125": "The feature detects an undefended back rank square (a8, b8, c8, g8, h8) that is attacked by at least one enemy piece.",
"sae_40182": "A white piece attacks a black piece on a square where the black piece is undefended or defended by an equal number of pieces.",
"sae_40133": "The feature detects squares on the 3rd or 4th rank that are attacked by at least one white piece and at most one black piece, often on the kingside.",
"sae_39920": "White pawn on f2/g2, attacked only by white pieces, with white king on g1/h1.",
"sae_40177": "This feature detects a square attacked by White, where White has at least one more attacker than Black, and the square is on the 5th, 7th, or 8th rank.",
"sae_40298": "This feature detects squares on the 4th, 5th, or 6th ranks that are attacked by a white pawn on an adjacent file.",
"sae_40253": "A square on the 4th rank is attacked by White and undefended by Black.",
"sae_40314": "A king is on the target square or an adjacent square, and the target square is attacked by a black piece.",
"sae_40068": "This feature detects a white bishop on a light square, attacked by at least one white piece and no black pieces.",
"sae_39959": "This feature detects a king on the 7th rank (or 2nd for black) with a pawn on the 6th rank (or 3rd for black) on an adjacent file, and the target square is the back rank on the same file as the pawn.",
"sae_40398": "This feature detects squares attacked by a black pawn, especially when the square is empty and attacked by at most one white piece.",
"sae_40448": "This feature detects squares that are attacked by a white pawn and a black pawn, often on the same file or adjacent files, creating a pawn-on-pawn tension.",
"sae_40482": "The feature detects a black queen on a square attacked by at least one black piece and zero white pieces.",
"sae_40450": "The feature detects a central square (c3, c5, e5, f3, g4) that is attacked by white and either undefended or defended by black.",
"sae_40462": "The feature detects squares attacked by a white rook, often on the back rank or an open file, with at least one white attacker and no black attackers.",
"sae_40527": "The feature detects a king on the 4th or 5th rank, with a pawn on an adjacent file on the 3rd or 4th rank, and the king is not attacked by the opponent.",
"sae_40476": "This feature detects squares that are attacked by a white queen on a1 or a2, especially if they are on the d-file or the 7th rank.",
"sae_40548": "The feature detects a white piece attacking a black piece on a central square (d4, e5, f5, f3, g3) where the white piece has at least as many attackers as the black piece.",
"sae_40481": "The feature detects an undefended or lightly defended empty square that is attacked by multiple white pieces, often in the center or near the king.",
"sae_39773": "The feature detects squares attacked by at least two black pieces, with a preference for squares on the 7th and 8th ranks.",
"sae_40380": "This feature detects squares that are attacked by multiple white pieces and are either undefended or defended by fewer black pieces, often in the center or near the opponent's king.",
"sae_40586": "The feature detects a pawn on the 7th rank that is either undefended or defended by an equal number of attackers from both sides.",
"sae_40555": "The feature detects a pawn on its original square (2nd rank for white, 7th for black) that is undefended and attacked by an enemy piece.",
"sae_40465": "This feature detects squares that are attacked by White and either undefended or defended by fewer Black pieces, often in the center or near the Black king.",
"sae_38800": "A square is attacked by two white pieces and defended by one black piece, with the target square being empty.",
"sae_40573": "This feature detects squares on the 7th or 8th rank that are attacked by a rook on the same rank, with the king of the opposing side on the 6th or 7th rank.",
"sae_40355": "This feature detects squares attacked by a black queen on d4, especially those on the 4th rank or near the white king.",
"sae_40572": "This feature detects a white rook or queen attacking a square on the back rank, with no black pieces defending that square.",
"sae_40707": "Detects a king on the back rank, with a friendly rook on the same rank, and a pawn on the 7th rank.",
"sae_40534": "The feature detects a white pawn on f3 or g3, or a white knight on f3, that can move to a square on the 4th rank (c4, b4, f4, g4) which is attacked by at least one black piece.",
"sae_38901": "A white knight on its starting square (b1, g1) or f3, which is attacked by 0 or 1 black pieces and 1 or 2 white pieces.",
"sae_40772": "This feature detects empty squares on the edge of the board that are not attacked by either side, particularly when the king is nearby.",
"sae_40583": "This feature detects an empty square on the back rank (a8 or h8) that is not attacked by either side, with the enemy king nearby.",
"sae_40441": "The feature detects an empty square on the first rank that is attacked by at least one friendly rook.",
"sae_40765": "The feature detects empty squares on the 7th or 8th rank that are attacked by a white rook on the 6th rank, with no black pieces attacking those squares.",
"sae_40762": "This feature detects an undefended square on the first three ranks, attacked by a white rook or queen, where the square is on the same file as the white king.",
"sae_40900": "The feature detects squares attacked by white, where white has at least one more attacker than black, especially on the 3rd, 4th, or 5th ranks.",
"sae_40827": "The feature detects an empty square on the 3rd or 7th rank (relative to the side to move) that is attacked by at least one friendly piece and not attacked by any enemy pieces.",
"sae_40860": "White rook participating in an attraction or fork tactic targeting an exposed king in an endgame.",
"sae_40923": "White King safety, specifically when the King is on the back rank or a corner, and there is a white piece (often a Rook or Queen) defending a square on the same rank or file, creating an escape square or defending against back rank mate threats.",
"sae_40789": "The feature detects empty corner squares or squares adjacent to corners, especially when the king is nearby and there's a pawn on the 3rd rank.",
"sae_40941": "This feature detects a white pawn on the 4th rank attacking a square on the 5th rank, often a pawn.",
"sae_40937": "The feature detects a white knight attacking an undefended square on the 6th or 7th rank, often near the king.",
"sae_40718": "The feature detects a vulnerable king on h8, often with a black rook or queen on the back rank, and no white defenders.",
"sae_40784": "The feature detects a white piece attacking a square on the 5th, 6th, or 7th rank, which is either undefended or defended by only one black piece.",
"sae_40802": "King safety: The feature detects squares that are safe for the king to move to, specifically when the king is on the 5th rank and there are no attacking pieces.",
"sae_40826": "Detects squares on the 7th or 8th rank that are attacked by a black piece and not defended by a white piece, often in positions where white has a rook on the 8th rank.",
"sae_40748": "White bishop on its starting square (or a square it could have moved to from its starting square) on the back rank, attacked only by white pieces.",
"sae_40934": "This feature detects a square that is attacked by a white piece and not attacked by a black piece, with the target square often being a piece or a square near the king.",
"sae_40732": "This feature detects a pawn on the 4th, 5th, or 6th rank that is attacked by both sides, with the attacking side having at least one knight or bishop attacker.",
"sae_40952": "The feature detects a pawn push that creates a passed pawn or supports an existing passed pawn, often on the 6th or 7th rank.",
"sae_39143": "The feature detects a king on the 7th rank, with the target square being any square on the 8th rank that is not attacked by the king.",
"sae_39211": "Black's king is castled kingside, and the h8 square is undefended by White, with at least one Black piece attacking it.",
"sae_40926": "This feature detects a pawn on the 2nd or 3rd rank that is attacked by both sides, with white",
"sae_39281": "Detects a white rook attacking an empty square on the second rank, especially when the white king is on the first rank.",
"sae_39248": "Detects a bishop on a long diagonal (a1-h8 or h1-a8) that is not blocked by any pieces and can reach the target square.",
"sae_39309": "White's king is castled kingside, and the target square is g2, which is either empty or occupied by a white rook, and is attacked by at least one white piece.",
"sae_39408": "A white knight on the first two ranks, especially on the kingside, that is either undefended or defended by white pieces.",
"sae_39531": "Detects an empty square on the back rank (rank 8 for White, rank 1 for Black) that is attacked by at least one enemy piece and not attacked by any friendly pieces.",
"sae_39714": "The feature detects a king on the back rank, especially when it is the target square, and there are no friendly pieces on the back rank to defend it.",
"sae_39825": "A pawn on the 2nd rank (for white) or 7th rank (for black) that is either undefended or attacked by an equal number of pieces.",
"sae_39816": "White King on the 3rd rank, with a friendly piece (likely a pawn) on an adjacent square on the 2nd rank, and a black rook on the same rank as the King.",
"sae_39828": "A white pawn on d-file is attacked by 0-1 black pieces and defended by 2-4 white pieces.",
"sae_39947": "A white knight on d4, d5, c3, or f3 that is attacked by one black piece and defended by two white pieces.",
"sae_40340": "Detects a white rook on the 6th rank, with the target square being a square on the 7th or 8th rank that is not attacked by black.",
"sae_40409": "A white king is on the first rank, and a white rook is attacking an empty square on the first rank, with no black attackers on that square.",
"sae_40371": "A square is attacked by a white queen and a black queen, with the white queen being the only white attacker.",
"sae_40316": "A piece (often a Bishop or Rook) is on a square where it is attacked by zero enemy pieces and zero friendly pieces, and the side to move is white.",
"sae_40373": "A pawn on its original square (2nd rank for White, 7th for Black) that is undefended by its own side.",
"sae_40679": "A white rook is on the 1st, 2nd, 4th, or 5th rank, and is either undefended or defended by one white piece, with no black attackers.",
"sae_40817": "A white rook or queen attacks an empty square on the first rank, potentially supported by other white pieces, with no black attackers."
}