White bishop actively placed on an open diagonal in a tactical mating position, often supporting a discovered check or promotion threat.
SAE concept sae_27853 fires when white bishop actively placed on an open diagonal in a tactical mating position, often supporting a discovered check or promotion threat.. It appears in 65 of 9,950 Climbchess puzzles (0.7%), spanning ELO 643–2591 (median 1340).
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This page documents White bishop actively placed on an open diagonal…, 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:
White bishop actively placed on an open diagonal in a tactical mating position, often supporting a discovered check or promotion threat.
This pattern fires in 65 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 643 to 2591, with a median rating of 1340. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_27853 |
|---|---|
| Puzzles where it fires | 65 |
| Min ELO | 643 |
| Median ELO | 1340 |
| Max ELO | 2591 |
| Coverage | 0.65% 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 zHgDK — ELO 643, themes: mate, mateIn1, middlegame, side to move: Black
- Puzzle zs2Bj_F — ELO 773, themes: backRankMate, endgame, mate, side to move: White
- Puzzle vqAdn — ELO 840, themes: endgame, hookMate, mate, side to move: White
- Puzzle zzG67_M — ELO 858, themes: long, mate, mateIn3, side to move: Black
- Puzzle 026En_F — ELO 1188, themes: advantage, endgame, short, side to move: Black
- Puzzle zzq22 — ELO 1340, themes: crushing, deflection, endgame, side to move: White
- Puzzle ynZxI_M — ELO 1645, themes: kingsideAttack, mate, mateIn1, side to move: White
- Puzzle zxbaB — ELO 1766, themes: advantage, hangingPiece, middlegame, side to move: Black
- Puzzle baTAu_F — ELO 1992, themes: arabianMate, endgame, exposedKing, side to move: Black
- Puzzle zvsSK_F — ELO 2339, themes: crushing, defensiveMove, deflection, 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_27853?
White bishop actively placed on an open diagonal in a tactical mating position, often supporting a discovered check or promotion threat. 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 65 tagged puzzles (0.7% of the set), spanning Lichess ELO 643 to 2591 with a median of 1340.
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.