A king on rank 1 or rank 8 with no opposing pieces attacking its square, typically in an endgame or mating-net position.
SAE concept sae_5761 fires when a king on rank 1 or rank 8 with no opposing pieces attacking its square, typically in an endgame or mating-net position.. It appears in 67 of 9,950 Climbchess puzzles (0.7%), spanning ELO 632–2677 (median 1062).
Free forever · no email · no signup · delete data anytime.
This page documents A king on rank 1 or rank 8 with no opposing…, 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:
A king on rank 1 or rank 8 with no opposing pieces attacking its square, typically in an endgame or mating-net position.
This pattern fires in 67 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 632 to 2677, with a median rating of 1062. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_5761 |
|---|---|
| Puzzles where it fires | 67 |
| Min ELO | 632 |
| Median ELO | 1062 |
| Max ELO | 2677 |
| Coverage | 0.67% 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 00uEf — ELO 632, themes: endgame, mate, mateIn2, side to move: Black
- Puzzle zlNFE — ELO 712, themes: advancedPawn, backRankMate, endgame, side to move: Black
- Puzzle 01sr1 — ELO 877, themes: endgame, mate, mateIn2, side to move: Black
- Puzzle 01ysM_F — ELO 965, themes: advancedPawn, crushing, endgame, side to move: White
- Puzzle zxPym_F — ELO 1007, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle zMjwr_F — ELO 1062, themes: backRankMate, endgame, fork, side to move: White
- Puzzle 028i3_M — ELO 1133, themes: advantage, endgame, rookEndgame, side to move: White
- Puzzle 77B2N — ELO 1212, themes: doubleBishopMate, endgame, mate, side to move: Black
- Puzzle 01BUa — ELO 1514, themes: advancedPawn, crushing, endgame, side to move: White
- Puzzle 0150p_M — ELO 1676, themes: crushing, endgame, long, 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_5761?
A king on rank 1 or rank 8 with no opposing pieces attacking its square, typically in an endgame or mating-net position. 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 67 tagged puzzles (0.7% of the set), spanning Lichess ELO 632 to 2677 with a median of 1062.
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.