A white-attacked black bishop on a central square (d3, d5, f4, a5) that is also attacked by at least one black piece.
SAE concept sae_13325 fires when a white-attacked black bishop on a central square (d3, d5, f4, a5) that is also attacked by at least one black piece.. It appears in 17 of 9,950 Climbchess puzzles (0.2%), spanning ELO 743–1587 (median 769).
Free forever · no email · no signup · delete data anytime.
This page documents A white-attacked black bishop on a central…, 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:
A white-attacked black bishop on a central square (d3, d5, f4, a5) that is also attacked by at least one black piece.
This pattern fires in 17 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 743 to 1587, with a median rating of 769. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_13325 |
|---|---|
| Puzzles where it fires | 17 |
| Min ELO | 743 |
| Median ELO | 769 |
| Max ELO | 1587 |
| Coverage | 0.17% 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 yuwgx — ELO 743, themes: endgame, hookMate, mate, side to move: Black
- Puzzle yuwgx_F — ELO 743, themes: endgame, hookMate, mate, side to move: White
- Puzzle rViFX — ELO 744, themes: endgame, hookMate, mate, side to move: Black
- Puzzle rViFX_M — ELO 744, themes: endgame, hookMate, mate, side to move: Black
- Puzzle zzU3r — ELO 769, themes: advantage, discoveredAttack, endgame, side to move: White
- Puzzle zzU3r_M — ELO 769, themes: advantage, discoveredAttack, endgame, side to move: White
- Puzzle zzaOC_F — ELO 900, themes: crushing, discoveredAttack, endgame, side to move: White
- Puzzle zzaOC_M — ELO 900, themes: crushing, discoveredAttack, endgame, side to move: Black
- Puzzle z8aT8_F — ELO 1218, themes: endgame, hookMate, mate, side to move: White
- Puzzle zzC2f_F — ELO 1587, themes: endgame, hookMate, mate, side to move: Black
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_13325?
A white-attacked black bishop on a central square (d3, d5, f4, a5) that is also attacked by at least one black piece. 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 17 tagged puzzles (0.2% of the set), spanning Lichess ELO 743 to 1587 with a median of 769.
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.