Central piece activity enabling a discovered attack or fork, often involving a rook or knight controlling the d- or e-file in the endgame.
SAE concept sae_29356 fires when central piece activity enabling a discovered attack or fork, often involving a rook or knight controlling the d- or e-file in the endgame.. It appears in 196 of 9,950 Climbchess puzzles (2.0%), spanning ELO 769–2691 (median 1841).
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This page documents Central piece activity enabling a discovered…, 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:
Central piece activity enabling a discovered attack or fork, often involving a rook or knight controlling the d- or e-file in the endgame.
This pattern fires in 196 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 769 to 2691, with a median rating of 1841. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_29356 |
|---|---|
| Puzzles where it fires | 196 |
| Min ELO | 769 |
| Median ELO | 1841 |
| Max ELO | 2691 |
| Coverage | 1.97% 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 zzU3r — ELO 769, themes: advantage, discoveredAttack, endgame, side to move: White
- Puzzle zzHjN — ELO 1139, themes: discoveredCheck, doubleCheck, kingsideAttack, side to move: White
- Puzzle yb5mp — ELO 1325, themes: discoveredCheck, doubleCheck, long, side to move: White
- Puzzle zskVk — ELO 1480, themes: discoveredCheck, doubleCheck, kingsideAttack, side to move: Black
- Puzzle zykZF — ELO 1595, themes: crushing, discoveredAttack, kingsideAttack, side to move: Black
- Puzzle fmKhm — ELO 1841, themes: arabianMate, discoveredAttack, discoveredCheck, side to move: White
- Puzzle zyLkJ_F — ELO 2085, themes: advantage, master, middlegame, side to move: Black
- Puzzle GI0Kh_F — ELO 2184, themes: discoveredCheck, doubleCheck, kingsideAttack, side to move: Black
- Puzzle PDqO7_M — ELO 2290, themes: anastasiaMate, attraction, discoveredAttack, side to move: Black
- Puzzle ySiDi_F — ELO 2522, themes: crushing, interference, middlegame, 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_29356?
Central piece activity enabling a discovered attack or fork, often involving a rook or knight controlling the d- or e-file in the endgame. 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 196 tagged puzzles (2.0% of the set), spanning Lichess ELO 769 to 2691 with a median of 1841.
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.