Two white bishops cooperating to control critical squares near the enemy king, typically in the context of a double-bishop mating attack or decisive positional squeeze.
SAE concept sae_6243 fires when two white bishops cooperating to control critical squares near the enemy king, typically in the context of a double-bishop mating attack or decisive positional squeeze.. It appears in 48 of 9,950 Climbchess puzzles (0.5%), spanning ELO 745–2554 (median 1212).
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This page documents Two white bishops cooperating to control…, 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:
Two white bishops cooperating to control critical squares near the enemy king, typically in the context of a double-bishop mating attack or decisive positional squeeze.
This pattern fires in 48 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 745 to 2554, with a median rating of 1212. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_6243 |
|---|---|
| Puzzles where it fires | 48 |
| Min ELO | 745 |
| Median ELO | 1212 |
| Max ELO | 2554 |
| Coverage | 0.48% 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 zE555 — ELO 745, themes: doubleBishopMate, endgame, master, side to move: Black
- Puzzle 016ow_F — ELO 756, themes: endgame, mate, mateIn1, side to move: White
- Puzzle vEHyR — ELO 843, themes: doubleBishopMate, endgame, mate, side to move: Black
- Puzzle kxMjO_F — ELO 1027, themes: doubleBishopMate, endgame, mate, side to move: Black
- Puzzle 01Qv4_F — ELO 1061, themes: mate, mateIn1, middlegame, side to move: White
- Puzzle 77B2N_M — ELO 1212, themes: doubleBishopMate, endgame, mate, side to move: Black
- Puzzle zx7wb — ELO 1385, themes: crushing, endgame, short, side to move: White
- Puzzle zzrCr_F — ELO 1510, themes: crushing, discoveredAttack, discoveredCheck, side to move: White
- Puzzle zgAW0_M — ELO 2319, themes: advancedPawn, crushing, endgame, side to move: Black
- Puzzle z6t5w_F — ELO 2545, themes: advantage, deflection, 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_6243?
Two white bishops cooperating to control critical squares near the enemy king, typically in the context of a double-bishop mating attack or decisive positional squeeze. 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 48 tagged puzzles (0.5% of the set), spanning Lichess ELO 745 to 2554 with a median of 1212.
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.