Kings in close proximity (within 2-3 squares) during endgame, neither in check.
SAE concept sae_22322 fires when kings in close proximity (within 2-3 squares) during endgame, neither in check.. It appears in 29 of 9,950 Climbchess puzzles (0.3%), spanning ELO 1165–2616 (median 1406).
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This page documents Kings in close proximity (within 2-3 squares)…, 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:
Kings in close proximity (within 2-3 squares) during endgame, neither in check.
This pattern fires in 29 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 1165 to 2616, with a median rating of 1406. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_22322 |
|---|---|
| Puzzles where it fires | 29 |
| Min ELO | 1165 |
| Median ELO | 1406 |
| Max ELO | 2616 |
| Coverage | 0.29% 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 zdyQ6 — ELO 1165, themes: crushing, endgame, pawnEndgame, side to move: White
- Puzzle zdyQ6_M — ELO 1165, themes: crushing, endgame, pawnEndgame, side to move: White
- Puzzle zwand_M — ELO 1194, themes: advancedPawn, crushing, endgame, side to move: White
- Puzzle 019Qi_M — ELO 1212, themes: crushing, endgame, long, side to move: Black
- Puzzle zsYWx_M — ELO 1405, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle zsAsR_M — ELO 1406, themes: advancedPawn, crushing, endgame, side to move: Black
- Puzzle zpT7N_M — ELO 1592, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle zh0Br_F — ELO 2280, themes: advancedPawn, crushing, endgame, side to move: Black
- Puzzle zHUbg — ELO 2608, themes: advancedPawn, crushing, endgame, side to move: White
- Puzzle 01AyE — ELO 2616, themes: crushing, endgame, pawnEndgame, 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_22322?
Kings in close proximity (within 2-3 squares) during endgame, neither in check. 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 29 tagged puzzles (0.3% of the set), spanning Lichess ELO 1165 to 2616 with a median of 1406.
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.