White king in a relatively safe position in a rook or mixed endgame, not under immediate attack, often with active rooks on open files.
SAE concept sae_29652 fires when white king in a relatively safe position in a rook or mixed endgame, not under immediate attack, often with active rooks on open files.. It appears in 21 of 9,950 Climbchess puzzles (0.2%), spanning ELO 723–2652 (median 1892).
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This page documents White king in a relatively safe position in a…, 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:
White king in a relatively safe position in a rook or mixed endgame, not under immediate attack, often with active rooks on open files.
This pattern fires in 21 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 723 to 2652, with a median rating of 1892. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_29652 |
|---|---|
| Puzzles where it fires | 21 |
| Min ELO | 723 |
| Median ELO | 1892 |
| Max ELO | 2652 |
| Coverage | 0.21% 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 zqkRF — ELO 723, themes: crushing, endgame, rookEndgame, side to move: Black
- Puzzle ztnUm_M — ELO 728, themes: advantage, endgame, rookEndgame, side to move: Black
- Puzzle zs9TP_F — ELO 1236, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle zOJUe — ELO 1836, themes: anastasiaMate, endgame, kingsideAttack, side to move: Black
- Puzzle zzlNM — ELO 1892, themes: endgame, long, mate, side to move: Black
- Puzzle zzlNM_M — ELO 1892, themes: endgame, long, mate, side to move: Black
- Puzzle zomJR_F — ELO 1947, themes: advantage, endgame, interference, side to move: White
- Puzzle zzq18_F — ELO 2030, themes: crushing, kingsideAttack, long, side to move: White
- Puzzle zskJP — ELO 2269, themes: crushing, endgame, quietMove, side to move: Black
- Puzzle zskJP_M — ELO 2269, themes: crushing, endgame, quietMove, 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_29652?
White king in a relatively safe position in a rook or mixed endgame, not under immediate attack, often with active rooks on open files. 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 21 tagged puzzles (0.2% of the set), spanning Lichess ELO 723 to 2652 with a median of 1892.
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.