Detects black kingside pawn structure with a protected pawn on h7 (or equivalent 7th-rank edge pawn) shielding a castled king.
SAE concept sae_1931 fires when detects black kingside pawn structure with a protected pawn on h7 (or equivalent 7th-rank edge pawn) shielding a castled king.. It appears in 437 of 9,950 Climbchess puzzles (4.4%), spanning ELO 626–2614 (median 1274).
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This page documents Detects black kingside pawn structure with a…, 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:
Detects black kingside pawn structure with a protected pawn on h7 (or equivalent 7th-rank edge pawn) shielding a castled king.
This pattern fires in 437 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 626 to 2614, with a median rating of 1274. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_1931 |
|---|---|
| Puzzles where it fires | 437 |
| Min ELO | 626 |
| Median ELO | 1274 |
| Max ELO | 2614 |
| Coverage | 4.39% of puzzle set |
Related concepts
The five concepts most often co-firing alongside this one (Jaccard similarity over the puzzle co-occurrence graph) are:
Example puzzles
Below are 10 puzzles spanning the rating distribution. Each links to its own page with full move list and related concepts.
- Puzzle zSBhc — ELO 626, themes: backRankMate, mate, mateIn2, side to move: Black
- Puzzle zhdVD_M — ELO 746, themes: backRankMate, endgame, mate, side to move: White
- Puzzle zxYWV — ELO 847, themes: backRankMate, endgame, mate, side to move: White
- Puzzle zuXgA_M — ELO 923, themes: backRankMate, endgame, mate, side to move: White
- Puzzle zyO1w — ELO 1056, themes: crushing, deflection, discoveredAttack, side to move: Black
- Puzzle zvbAw_F — ELO 1274, themes: backRankMate, fork, long, side to move: Black
- Puzzle ztz67_F — ELO 1407, themes: backRankMate, endgame, long, side to move: White
- Puzzle 00SU7_F — ELO 1659, themes: advantage, fork, long, side to move: Black
- Puzzle yvicD_F — ELO 1999, themes: backRankMate, clearance, endgame, side to move: Black
- Puzzle ziCDI_F — ELO 2257, themes: crushing, discoveredAttack, endgame, side to move: White
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).
Frequently asked
What is SAE concept sae_1931?
Detects black kingside pawn structure with a protected pawn on h7 (or equivalent 7th-rank edge pawn) shielding a castled king. It is one of 4,505 interpretable features extracted from Leela Chess Zero's residual stream via sparse autoencoders, then labelled by reading the top-activating positions.
Where does this pattern appear?
In 437 tagged puzzles (4.4% of the set), spanning Lichess ELO 626 to 2614 with a median of 1274.
How do I train it?
Open the Climbchess trainer and filter for puzzles tagged with this concept. The trainer adapts difficulty using your live recognition profile and tracks how often you spot the cue versus miss it.
Is it free?
Yes. Climbchess is free forever, with no account, email, or signup required. You can delete your data at any time.