Black kingside pawn cluster sheltering the king, not under immediate white attack.
SAE concept sae_1863 fires when black kingside pawn cluster sheltering the king, not under immediate white attack.. It appears in 23 of 9,950 Climbchess puzzles (0.2%), spanning ELO 666–2269 (median 1051).
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This page documents Black kingside pawn cluster sheltering the king…, 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:
Black kingside pawn cluster sheltering the king, not under immediate white attack.
This pattern fires in 23 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 666 to 2269, with a median rating of 1051. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_1863 |
|---|---|
| Puzzles where it fires | 23 |
| Min ELO | 666 |
| Median ELO | 1051 |
| Max ELO | 2269 |
| Coverage | 0.23% 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 zvM6y — ELO 666, themes: advantage, discoveredAttack, endgame, side to move: Black
- Puzzle zvM6y_M — ELO 666, themes: advantage, discoveredAttack, endgame, side to move: Black
- Puzzle zs2Bj_F — ELO 773, themes: backRankMate, endgame, mate, side to move: White
- Puzzle xxINJ — ELO 832, themes: advantage, clearance, endgame, side to move: White
- Puzzle 01kih — ELO 1051, themes: advantage, deflection, endgame, side to move: Black
- Puzzle 01kih_M — ELO 1051, themes: advantage, deflection, endgame, side to move: Black
- Puzzle 00BSo_F — ELO 1267, themes: advantage, endgame, short, side to move: Black
- Puzzle zzjnk_F — ELO 1751, themes: advantage, endgame, long, side to move: White
- Puzzle zzhjS — ELO 2255, themes: advantage, endgame, intermezzo, side to move: White
- Puzzle zzhjS_M — ELO 2255, themes: advantage, endgame, intermezzo, 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_1863?
Black kingside pawn cluster sheltering the king, not under immediate white attack. 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 23 tagged puzzles (0.2% of the set), spanning Lichess ELO 666 to 2269 with a median of 1051.
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.