Active king centralised in a pawn or minor-piece endgame, often deciding the outcome through king opposition, zugzwang, or superior activity.
SAE concept sae_25932 fires when active king centralised in a pawn or minor-piece endgame, often deciding the outcome through king opposition, zugzwang, or superior activity.. It appears in 259 of 9,950 Climbchess puzzles (2.6%), spanning ELO 605–2680 (median 1747).
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This page documents Active king centralised in a pawn or minor-piece…, 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:
Active king centralised in a pawn or minor-piece endgame, often deciding the outcome through king opposition, zugzwang, or superior activity.
This pattern fires in 259 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 605 to 2680, with a median rating of 1747. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_25932 |
|---|---|
| Puzzles where it fires | 259 |
| Min ELO | 605 |
| Median ELO | 1747 |
| Max ELO | 2680 |
| Coverage | 2.60% 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 yS8nE_M — ELO 605, themes: crushing, endgame, long, side to move: Black
- Puzzle zvpPB_M — ELO 934, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle zdyQ6_M — ELO 1165, themes: crushing, endgame, pawnEndgame, side to move: White
- Puzzle zkTZL_M — ELO 1323, themes: crushing, endgame, pawnEndgame, side to move: White
- Puzzle 01vQy_F — ELO 1571, themes: crushing, endgame, master, side to move: Black
- Puzzle yRFZI_F — ELO 1747, themes: endgame, hookMate, master, side to move: Black
- Puzzle zzExe_F — ELO 1875, themes: crushing, endgame, pawnEndgame, side to move: White
- Puzzle zxPtR_M — ELO 2039, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle zfvCd — ELO 2299, themes: crushing, endgame, long, side to move: White
- Puzzle z6KPV — ELO 2533, themes: crushing, endgame, pawnEndgame, 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_25932?
Active king centralised in a pawn or minor-piece endgame, often deciding the outcome through king opposition, zugzwang, or superior activity. 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 259 tagged puzzles (2.6% of the set), spanning Lichess ELO 605 to 2680 with a median of 1747.
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.