This feature detects a square attacked by a single black piece, which is not attacked by any white piece, and is on the first or second rank.
SAE concept sae_30414 fires when this feature detects a square attacked by a single black piece, which is not attacked by any white piece, and is on the first or second rank.. It appears in 2 of 9,950 Climbchess puzzles (0.0%), spanning ELO 610–610 (median 610).
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This page documents This feature detects a square attacked by 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:
This feature detects a square attacked by a single black piece, which is not attacked by any white piece, and is on the first or second rank.
This pattern fires in 2 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 610 to 610, with a median rating of 610. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_30414 |
|---|---|
| Puzzles where it fires | 2 |
| Min ELO | 610 |
| Median ELO | 610 |
| Max ELO | 610 |
| Coverage | 0.02% 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 2 puzzles spanning the rating distribution. Each links to its own page with full move list and related concepts.
- Puzzle ydABK — ELO 610, themes: crushing, endgame, hangingPiece, side to move: White
- Puzzle ydABK_F — ELO 610, themes: crushing, endgame, hangingPiece, 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_30414?
This feature detects a square attacked by a single black piece, which is not attacked by any white piece, and is on the first or second rank. 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 2 tagged puzzles (0.0% of the set), spanning Lichess ELO 610 to 610 with a median of 610.
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.