White bishop on home territory (ranks 1-3) in a standard development position, surrounded by friendly pieces with limited enemy pressure.
SAE concept sae_12239 fires when white bishop on home territory (ranks 1-3) in a standard development position, surrounded by friendly pieces with limited enemy pressure.. It appears in 1,204 of 9,950 Climbchess puzzles (12.1%), spanning ELO 627–2692 (median 1641).
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This page documents White bishop on home territory (ranks 1-3) in a…, 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 on home territory (ranks 1-3) in a standard development position, surrounded by friendly pieces with limited enemy pressure.
This pattern fires in 1,204 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 627 to 2692, with a median rating of 1641. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_12239 |
|---|---|
| Puzzles where it fires | 1,204 |
| Min ELO | 627 |
| Median ELO | 1641 |
| Max ELO | 2692 |
| Coverage | 12.10% 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 zznMe — ELO 627, themes: crushing, kingsideAttack, master, side to move: White
- Puzzle syQjh_F — ELO 880, themes: advantage, interference, middlegame, side to move: White
- Puzzle 01J3m_M — ELO 1117, themes: crushing, master, middlegame, side to move: White
- Puzzle 01VQD_F — ELO 1344, themes: mate, mateIn2, middlegame, side to move: Black
- Puzzle zzj9Z_F — ELO 1469, themes: advantage, kingsideAttack, opening, side to move: Black
- Puzzle 00rB5_M — ELO 1641, themes: crushing, master, middlegame, side to move: Black
- Puzzle z5RPJ — ELO 1823, themes: mate, mateIn1, middlegame, side to move: White
- Puzzle 00Qog_F — ELO 2057, themes: crushing, middlegame, short, side to move: Black
- Puzzle xM4OM_F — ELO 2224, themes: endgame, mate, mateIn1, side to move: White
- Puzzle FvIp5_F — ELO 2435, themes: backRankMate, fork, master, 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_12239?
White bishop on home territory (ranks 1-3) in a standard development position, surrounded by friendly pieces with limited enemy 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 1,204 tagged puzzles (12.1% of the set), spanning Lichess ELO 627 to 2692 with a median of 1641.
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.