A black bishop on an advanced square attacked only by black pawns, with no white pressure.
SAE concept sae_3378 fires when a black bishop on an advanced square attacked only by black pawns, with no white pressure.. It appears in 157 of 9,950 Climbchess puzzles (1.6%), spanning ELO 619–2569 (median 1383).
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This page documents A black bishop on an advanced square attacked…, 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 black bishop on an advanced square attacked only by black pawns, with no white pressure.
This pattern fires in 157 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 619 to 2569, with a median rating of 1383. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_3378 |
|---|---|
| Puzzles where it fires | 157 |
| Min ELO | 619 |
| Median ELO | 1383 |
| Max ELO | 2569 |
| Coverage | 1.58% 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 ufpHl — ELO 619, themes: arabianMate, kingsideAttack, mate, side to move: Black
- Puzzle 01E8U_F — ELO 743, themes: mate, mateIn1, middlegame, side to move: White
- Puzzle zQRXZ_F — ELO 869, themes: advantage, middlegame, pin, side to move: Black
- Puzzle 00piA — ELO 1110, themes: advantage, fork, middlegame, side to move: Black
- Puzzle tgoLA — ELO 1229, themes: anastasiaMate, attraction, kingsideAttack, side to move: White
- Puzzle z6ZVe_F — ELO 1383, themes: advantage, attraction, long, side to move: White
- Puzzle zxwNN_F — ELO 1617, themes: crushing, discoveredAttack, long, side to move: Black
- Puzzle zzTZ8 — ELO 1754, themes: crushing, defensiveMove, long, side to move: Black
- Puzzle 027OD_M — ELO 2023, themes: advantage, fork, long, side to move: White
- Puzzle zzjfL_M — ELO 2283, themes: crushing, middlegame, veryLong, 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_3378?
A black bishop on an advanced square attacked only by black pawns, with no white pressure. 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 157 tagged puzzles (1.6% of the set), spanning Lichess ELO 619 to 2569 with a median of 1383.
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.