Black bishop actively placed in an endgame, often contesting the same diagonal or file as a white bishop or rook.
SAE concept sae_13178 fires when black bishop actively placed in an endgame, often contesting the same diagonal or file as a white bishop or rook.. It appears in 164 of 9,950 Climbchess puzzles (1.6%), spanning ELO 666–2696 (median 1339).
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This page documents Black bishop actively placed in an endgame…, 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 bishop actively placed in an endgame, often contesting the same diagonal or file as a white bishop or rook.
This pattern fires in 164 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 666 to 2696, with a median rating of 1339. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_13178 |
|---|---|
| Puzzles where it fires | 164 |
| Min ELO | 666 |
| Median ELO | 1339 |
| Max ELO | 2696 |
| Coverage | 1.65% 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 zbFfw_M — ELO 791, themes: deflection, discoveredAttack, endgame, side to move: Black
- Puzzle zuHxz — ELO 898, themes: deflection, endgame, mate, side to move: Black
- Puzzle zZf24_F — ELO 964, themes: arabianMate, mate, mateIn2, side to move: White
- Puzzle zzRbe_F — ELO 1158, themes: advantage, endgame, long, side to move: Black
- Puzzle zLjAZ — ELO 1339, themes: advancedPawn, attraction, crushing, side to move: Black
- Puzzle zmHzv — ELO 1749, themes: crushing, deflection, endgame, side to move: White
- Puzzle G1wz1_M — ELO 1883, themes: anastasiaMate, attraction, endgame, side to move: Black
- Puzzle 00XbN — ELO 2093, themes: advancedPawn, advantage, endgame, side to move: Black
- Puzzle zUVCu_M — ELO 2295, themes: advantage, endgame, exposedKing, 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_13178?
Black bishop actively placed in an endgame, often contesting the same diagonal or file as a white bishop or rook. 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 164 tagged puzzles (1.6% of the set), spanning Lichess ELO 666 to 2696 with a median of 1339.
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.