Active king in endgame, either centralised in pawn endings or pursuing the opponent's king in rook endgames.
SAE concept sae_35770 fires when active king in endgame, either centralised in pawn endings or pursuing the opponent's king in rook endgames.. It appears in 50 of 9,950 Climbchess puzzles (0.5%), spanning ELO 763–2427 (median 1415).
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This page documents Active king in endgame, either centralised in…, 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 in endgame, either centralised in pawn endings or pursuing the opponent's king in rook endgames.
This pattern fires in 50 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 763 to 2427, with a median rating of 1415. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_35770 |
|---|---|
| Puzzles where it fires | 50 |
| Min ELO | 763 |
| Median ELO | 1415 |
| Max ELO | 2427 |
| Coverage | 0.50% 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 zDwOn — ELO 763, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle ztPf4_M — ELO 833, themes: advantage, endgame, rookEndgame, side to move: Black
- Puzzle zimOe_F — ELO 875, themes: crushing, deflection, endgame, side to move: Black
- Puzzle zu5IY — ELO 888, themes: deflection, endgame, mate, side to move: Black
- Puzzle ztS51_F — ELO 963, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle 01AwS — ELO 1415, themes: crushing, endgame, long, side to move: Black
- Puzzle zrNTI_M — ELO 1542, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle zcESo_M — ELO 2060, themes: advancedPawn, crushing, endgame, side to move: White
- Puzzle ztFY2_F — ELO 2111, themes: crushing, endgame, pawnEndgame, side to move: White
- Puzzle zptRs_F — ELO 2259, themes: crushing, defensiveMove, endgame, 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_35770?
Active king in endgame, either centralised in pawn endings or pursuing the opponent's king in rook endgames. 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 50 tagged puzzles (0.5% of the set), spanning Lichess ELO 763 to 2427 with a median of 1415.
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.