Puzzle xxJyS_F — ELO 2668
This is a White-to-move puzzle rated 2668 ELO. The first move is g8g3, tagged with 10 interpretable concepts and Lichess themes: advancedPawn, crushing, endgame.
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Position
White to move. ELO 2668. Themes: advancedPawn, crushing, endgame, exposedKing, promotion, queenEndgame, quietMove, veryLong.
FEN: 6Q1/8/1p6/8/8/3k1q1K/7P/8 w - - 3 59
Show solution (16 ply)
Try to find the move yourself first — look for the rarest concept firing on this position before peeking. Solution sequence: g8g3 d3e3 h3h4 f3g3 h2g3 b6b5 g3g4 b5b4 g4g5 b4b3 g5g6 b3b2 g6g7 b2b1q g7g8q b1h1
Concepts that fire on this position
Our SAE pipeline tagged this position with 10 active features. Each links to a page documenting that pattern in detail.
Why this puzzle is hard
The rarest pattern firing here is Queen endgame with an exposed king under indirect long-range queen pressure…, which appears in only 4 of our 9,950 puzzles (0.04%). Rare patterns tend to be the bottleneck — players who haven't internalised them will fail this puzzle even when their tactical calculation is otherwise solid.
The puzzle's Lichess ELO of 2668 reflects this: solvers below that rating typically miss the cue entirely.
Similar puzzles
Puzzles sharing the most concept tags with this one — a stronger signal than theme overlap because it reflects the actual patterns Leela recognises.
Train this pattern
Click through to the Climbchess trainer to attempt the position interactively against the same Leela network that tagged it. The trainer adapts difficulty using your live concept-recognition profile — it surfaces puzzles tagged with concepts you've been missing, not random brawls.
If you want the underlying methodology, the how-it-works page walks through the SAE training run, the labelling pipeline, and the puzzle-tagging procedure end-to-end.
Frequently asked
What is the rating of this puzzle?
2668 Lichess ELO. Solvers below that rating typically miss the key cue.
Which side moves first?
White to move; the first move of the solution is g8g3.
What concepts does it train?
10 SAE-derived patterns including A queen on a contested square with White to move, under…; White King near a corner square (a1, h1, a2, h2) in an…; Detects a king on the target square that is not attacked….
Can I attempt it without an account?
Yes — Climbchess requires no signup or email. Click the trainer link to play the position interactively.