Rook endgame with active rook placement, often involving deflection, interference, or mating threats.

By Climbchess Research · 2026-05-08 · 3 min read · Updated May 8, 2026

SAE concept sae_11532 fires when rook endgame with active rook placement, often involving deflection, interference, or mating threats.. It appears in 39 of 9,950 Climbchess puzzles (0.4%), spanning ELO 723–2549 (median 889).

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This page documents Rook endgame with active rook placement, often…, one of 4,505 interpretable chess concepts extracted from Leela Chess Zero via sparse autoencoders. The full feature description from our SAE labelling pipeline reads:

Rook endgame with active rook placement, often involving deflection, interference, or mating threats.

This pattern fires in 39 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 723 to 2549, with a median rating of 889. That distribution tells you whether this is a beginner cue or a master-level subtlety.

Pattern statistics

Related concepts

The five concepts most often co-firing alongside this one (Jaccard similarity over the puzzle co-occurrence graph) are:

• Rook near the king in an endgame, typically on the 2nd or 7th rank… — similarity 0.133
• Black rook actively placed in the opponent's half or mid-board, creating a… — similarity 0.103
• Active White rook threatening a decisive intrusion — 7th rank penetration or… — similarity 0.095
• Rook endgame where White has a positional or material advantage — connected… — similarity 0.068
• Advanced or passed pawn in a bishop or pawn endgame, often a connected or… — similarity 0.060

Example puzzles

Below are 10 puzzles spanning the rating distribution. Each links to its own page with full move list and related concepts.

• Puzzle zxvtr — ELO 723, themes: crushing, endgame, fork, side to move: Black
• Puzzle st8SM — ELO 724, themes: crushing, endgame, interference, side to move: Black
• Puzzle 01qVt_F — ELO 766, themes: endgame, master, mate, side to move: Black
• Puzzle y9L7e_M — ELO 796, themes: deflection, endgame, mate, side to move: White
• Puzzle zzlB3 — ELO 870, themes: endgame, mate, mateIn2, side to move: White
• Puzzle yPJRZ_F — ELO 889, themes: crushing, endgame, exposedKing, side to move: Black
• Puzzle zyFs4 — ELO 1415, themes: advancedPawn, crushing, deflection, side to move: White
• Puzzle zTNFW_M — ELO 1679, themes: crushing, endgame, interference, side to move: Black
• Puzzle zx2dq_F — ELO 2180, themes: advancedPawn, crushing, endgame, side to move: Black
• Puzzle zxVDE_M — ELO 2289, themes: crushing, defensiveMove, discoveredAttack, side to move: Black

How to use this page

If you want to train this pattern, open the Climbchess trainer and filter for puzzles tagged with this concept. The trainer surfaces them at the right difficulty for your current rating, and tracks how often you spot the cue versus miss it. You can also browse the related concepts above to see neighbouring ideas in feature space.

Climbchess concepts are not heuristics written by a human author. Each one corresponds to a single direction in the residual stream of Leela Chess Zero that activates on a specific board feature, then was labelled by reading the top-activating positions. This makes the catalogue exhaustive (every Leela-detectable pattern is in here somewhere) and falsifiable (you can replay our extraction).