Black king on g8 or f8, sheltered by kingside pawns, in a middlegame or endgame tactical position.
SAE concept sae_3679 fires when black king on g8 or f8, sheltered by kingside pawns, in a middlegame or endgame tactical position.. It appears in 876 of 9,950 Climbchess puzzles (8.8%), spanning ELO 643–2694 (median 1807).
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This page documents Black king on g8 or f8, sheltered by kingside…, 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:
Black king on g8 or f8, sheltered by kingside pawns, in a middlegame or endgame tactical position.
This pattern fires in 876 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 643 to 2694, with a median rating of 1807. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_3679 |
|---|---|
| Puzzles where it fires | 876 |
| Min ELO | 643 |
| Median ELO | 1807 |
| Max ELO | 2694 |
| Coverage | 8.80% 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 zHgDK — ELO 643, themes: mate, mateIn1, middlegame, side to move: Black
- Puzzle zvocX — ELO 952, themes: deflection, mate, mateIn2, side to move: White
- Puzzle zqgIH — ELO 1214, themes: advancedPawn, attraction, crushing, side to move: White
- Puzzle zo4jf_M — ELO 1460, themes: clearance, crushing, discoveredAttack, side to move: White
- Puzzle xEucz_M — ELO 1632, themes: doubleBishopMate, mate, mateIn1, side to move: White
- Puzzle zwJb4 — ELO 1807, themes: advantage, defensiveMove, hangingPiece, side to move: White
- Puzzle zzmbg — ELO 1947, themes: advancedPawn, collinearMove, crushing, side to move: Black
- Puzzle zx6ya_M — ELO 2152, themes: crushing, discoveredAttack, discoveredCheck, side to move: White
- Puzzle zgAW0 — ELO 2319, themes: advancedPawn, crushing, endgame, side to move: Black
- Puzzle ZmFWP_M — ELO 2491, themes: doubleBishopMate, kingsideAttack, mate, 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_3679?
Black king on g8 or f8, sheltered by kingside pawns, in a middlegame or endgame tactical 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 876 tagged puzzles (8.8% of the set), spanning Lichess ELO 643 to 2694 with a median of 1807.
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.