Active rook delivering or threatening a decisive mating attack in the endgame, often operating on an open file or rank in coordination with other pieces.
SAE concept sae_1044 fires when active rook delivering or threatening a decisive mating attack in the endgame, often operating on an open file or rank in coordination with other pieces.. It appears in 602 of 9,950 Climbchess puzzles (6.1%), spanning ELO 610–2683 (median 1340).
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This page documents Active rook delivering or threatening a decisive…, 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:
Active rook delivering or threatening a decisive mating attack in the endgame, often operating on an open file or rank in coordination with other pieces.
This pattern fires in 602 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 610 to 2683, with a median rating of 1340. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_1044 |
|---|---|
| Puzzles where it fires | 602 |
| Min ELO | 610 |
| Median ELO | 1340 |
| Max ELO | 2683 |
| Coverage | 6.05% 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 ydABK — ELO 610, themes: crushing, endgame, hangingPiece, side to move: White
- Puzzle zbvaV — ELO 808, themes: endgame, hookMate, mate, side to move: Black
- Puzzle zpVC1_F — ELO 878, themes: crushing, endgame, rookEndgame, side to move: White
- Puzzle ziE5Q_F — ELO 992, themes: anastasiaMate, endgame, mate, side to move: White
- Puzzle zrikO_M — ELO 1151, themes: crushing, endgame, master, side to move: Black
- Puzzle zzq22_M — ELO 1340, themes: crushing, deflection, endgame, side to move: White
- Puzzle xneYF — ELO 1512, themes: endgame, hookMate, mate, side to move: Black
- Puzzle zy5gp_F — ELO 1673, themes: advantage, attraction, capturingDefender, side to move: White
- Puzzle zYUwm_M — ELO 2030, themes: endgame, long, mate, side to move: White
- Puzzle yz9qZ_F — ELO 2184, themes: advantage, endgame, master, 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_1044?
Active rook delivering or threatening a decisive mating attack in the endgame, often operating on an open file or rank in coordination with other pieces. 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 602 tagged puzzles (6.1% of the set), spanning Lichess ELO 610 to 2683 with a median of 1340.
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.