Contested central or kingside 4th-rank pawn under pressure from multiple enemy pieces.
SAE concept sae_7257 fires when contested central or kingside 4th-rank pawn under pressure from multiple enemy pieces.. It appears in 94 of 9,950 Climbchess puzzles (0.9%), spanning ELO 850–2642 (median 1918).
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This page documents Contested central or kingside 4th-rank pawn…, 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:
Contested central or kingside 4th-rank pawn under pressure from multiple enemy pieces.
This pattern fires in 94 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 850 to 2642, with a median rating of 1918. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_7257 |
|---|---|
| Puzzles where it fires | 94 |
| Min ELO | 850 |
| Median ELO | 1918 |
| Max ELO | 2642 |
| Coverage | 0.94% 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 zw5aa — ELO 850, themes: endgame, mate, mateIn2, side to move: White
- Puzzle zzqqd_M — ELO 933, themes: kingsideAttack, mate, mateIn2, side to move: Black
- Puzzle yS6kj_M — ELO 1153, themes: crushing, endgame, pawnEndgame, side to move: White
- Puzzle zjgz8_F — ELO 1262, themes: advantage, long, middlegame, side to move: Black
- Puzzle y0gyC_M — ELO 1636, themes: anastasiaMate, attraction, endgame, side to move: Black
- Puzzle zys4h_M — ELO 1918, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle zzTv6_F — ELO 2011, themes: advancedPawn, crushing, deflection, side to move: Black
- Puzzle zvXtA — ELO 2187, themes: crushing, deflection, endgame, side to move: White
- Puzzle znZys — ELO 2343, themes: crushing, deflection, endgame, side to move: Black
- Puzzle zYrYh — ELO 2506, themes: bishopEndgame, crushing, discoveredAttack, 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_7257?
Contested central or kingside 4th-rank pawn under pressure from multiple enemy pieces. 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 94 tagged puzzles (0.9% of the set), spanning Lichess ELO 850 to 2642 with a median of 1918.
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.