Detects an undeveloped or passively placed black bishop defended by own pieces and unthreatened by white, typically in opening or early middlegame structures.
SAE concept sae_1481 fires when detects an undeveloped or passively placed black bishop defended by own pieces and unthreatened by white, typically in opening or early middlegame structures.. It appears in 213 of 9,950 Climbchess puzzles (2.1%), spanning ELO 610–2692 (median 1422).
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This page documents Detects an undeveloped or passively placed black…, 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:
Detects an undeveloped or passively placed black bishop defended by own pieces and unthreatened by white, typically in opening or early middlegame structures.
This pattern fires in 213 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 610 to 2692, with a median rating of 1422. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_1481 |
|---|---|
| Puzzles where it fires | 213 |
| Min ELO | 610 |
| Median ELO | 1422 |
| Max ELO | 2692 |
| Coverage | 2.14% 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 zXEls — ELO 610, themes: mate, mateIn1, oneMove, side to move: White
- Puzzle zcNnc_F — ELO 864, themes: mate, mateIn1, oneMove, side to move: White
- Puzzle zAd2T — ELO 1038, themes: mate, mateIn1, oneMove, side to move: Black
- Puzzle whtGg_F — ELO 1148, themes: doubleBishopMate, long, mate, side to move: Black
- Puzzle zvPKO — ELO 1276, themes: advantage, long, opening, side to move: Black
- Puzzle 3MJuc_F — ELO 1422, themes: doubleBishopMate, mate, mateIn2, side to move: Black
- Puzzle zw1MX_M — ELO 1558, themes: attraction, discoveredCheck, doubleCheck, side to move: Black
- Puzzle zxLlw — ELO 1776, themes: advantage, clearance, fork, side to move: Black
- Puzzle zu4WV — ELO 2060, themes: advantage, hangingPiece, long, side to move: Black
- Puzzle ziyjn — ELO 2385, themes: attackingF2F7, long, mate, 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_1481?
Detects an undeveloped or passively placed black bishop defended by own pieces and unthreatened by white, typically in opening or early middlegame structures. 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 213 tagged puzzles (2.1% of the set), spanning Lichess ELO 610 to 2692 with a median of 1422.
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.