Detects a king near its back rank under direct attack from an enemy long-range piece with limited defensive resources, typically in defensive-move puzzles.
SAE concept sae_5756 fires when detects a king near its back rank under direct attack from an enemy long-range piece with limited defensive resources, typically in defensive-move puzzles.. It appears in 58 of 9,950 Climbchess puzzles (0.6%), spanning ELO 698–2690 (median 1673).
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This page documents Detects a king near its back rank under direct…, 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 king near its back rank under direct attack from an enemy long-range piece with limited defensive resources, typically in defensive-move puzzles.
This pattern fires in 58 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 698 to 2690, with a median rating of 1673. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_5756 |
|---|---|
| Puzzles where it fires | 58 |
| Min ELO | 698 |
| Median ELO | 1673 |
| Max ELO | 2690 |
| Coverage | 0.58% 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 xVnVr — ELO 698, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle zYTta_M — ELO 826, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle ztNft_M — ELO 850, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle zipga — ELO 1081, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle zx1EE — ELO 1460, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle zvwST — ELO 1673, themes: advantage, middlegame, quietMove, side to move: White
- Puzzle zrSnH_M — ELO 1727, themes: advantage, endgame, exposedKing, side to move: White
- Puzzle zxuQL_F — ELO 2043, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle zBPbA — ELO 2312, themes: advancedPawn, advantage, defensiveMove, side to move: Black
- Puzzle zy2ah — ELO 2577, themes: crushing, defensiveMove, endgame, 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_5756?
Detects a king near its back rank under direct attack from an enemy long-range piece with limited defensive resources, typically in defensive-move puzzles. 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 58 tagged puzzles (0.6% of the set), spanning Lichess ELO 698 to 2690 with a median of 1673.
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.