Detects contested pawn endgame positions where an advanced pawn (either colour) on the 4th–6th rank is under pressure, often in zugzwang or deflection themes.
SAE concept sae_9342 fires when detects contested pawn endgame positions where an advanced pawn (either colour) on the 4th–6th rank is under pressure, often in zugzwang or deflection themes.. It appears in 11 of 9,950 Climbchess puzzles (0.1%), spanning ELO 702–2506 (median 2174).
Free forever · no email · no signup · delete data anytime.
This page documents Detects contested pawn endgame positions where…, 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 contested pawn endgame positions where an advanced pawn (either colour) on the 4th–6th rank is under pressure, often in zugzwang or deflection themes.
This pattern fires in 11 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 702 to 2506, with a median rating of 2174. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_9342 |
|---|---|
| Puzzles where it fires | 11 |
| Min ELO | 702 |
| Median ELO | 2174 |
| Max ELO | 2506 |
| Coverage | 0.11% 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 zx2zu — ELO 702, themes: blindSwineMate, endgame, mate, side to move: White
- Puzzle zx2zu_F — ELO 702, themes: blindSwineMate, endgame, mate, side to move: Black
- Puzzle zsN9q — ELO 1894, themes: crushing, deflection, endgame, side to move: Black
- Puzzle zsN9q_F — ELO 1894, themes: crushing, deflection, endgame, side to move: White
- Puzzle zsN9q_M — ELO 1894, themes: crushing, deflection, endgame, side to move: Black
- Puzzle zzNGa — ELO 2174, themes: attraction, crushing, endgame, side to move: Black
- Puzzle zzNGa_F — ELO 2174, themes: attraction, crushing, endgame, side to move: White
- Puzzle zzNGa_M — ELO 2174, themes: attraction, crushing, endgame, side to move: Black
- Puzzle 00sQw_M — ELO 2330, themes: bishopEndgame, crushing, endgame, side to move: White
- Puzzle zsYW7_F — ELO 2405, themes: crushing, defensiveMove, endgame, 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_9342?
Detects contested pawn endgame positions where an advanced pawn (either colour) on the 4th–6th rank is under pressure, often in zugzwang or deflection themes. 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 11 tagged puzzles (0.1% of the set), spanning Lichess ELO 702 to 2506 with a median of 2174.
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.