Detects a critical king step in a king-and-pawn endgame, likely related to gaining or maintaining the opposition.
SAE concept sae_10954 fires when detects a critical king step in a king-and-pawn endgame, likely related to gaining or maintaining the opposition.. It appears in 56 of 9,950 Climbchess puzzles (0.6%), spanning ELO 751–2405 (median 2040).
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This page documents Detects a critical king step in a king-and-pawn…, 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:
Detects a critical king step in a king-and-pawn endgame, likely related to gaining or maintaining the opposition.
This pattern fires in 56 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 751 to 2405, with a median rating of 2040. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_10954 |
|---|---|
| Puzzles where it fires | 56 |
| Min ELO | 751 |
| Median ELO | 2040 |
| Max ELO | 2405 |
| Coverage | 0.56% 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 zbKzl_M — ELO 751, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle zt9Jj_F — ELO 891, themes: advancedPawn, crushing, endgame, side to move: White
- Puzzle zZUsP_F — ELO 1206, themes: advancedPawn, crushing, defensiveMove, side to move: Black
- Puzzle zyqnN — ELO 1713, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle 01312 — ELO 1969, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle 00pWF — ELO 2040, themes: advancedPawn, crushing, endgame, side to move: White
- Puzzle zYKJq_M — ELO 2135, themes: crushing, endgame, pawnEndgame, side to move: White
- Puzzle zzC6G_M — ELO 2244, themes: advantage, defensiveMove, endgame, side to move: Black
- Puzzle zzJ3V_F — ELO 2348, themes: crushing, endgame, pawnEndgame, side to move: White
- Puzzle zwMyc_F — ELO 2399, 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_10954?
Detects a critical king step in a king-and-pawn endgame, likely related to gaining or maintaining the opposition. 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 56 tagged puzzles (0.6% of the set), spanning Lichess ELO 751 to 2405 with a median of 2040.
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.