Active white rook controlling open files or ranks in an endgame, often alongside a second rook.
SAE concept sae_1723 fires when active white rook controlling open files or ranks in an endgame, often alongside a second rook.. It appears in 31 of 9,950 Climbchess puzzles (0.3%), spanning ELO 666–2642 (median 1104).
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This page documents Active white rook controlling open files or…, 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 white rook controlling open files or ranks in an endgame, often alongside a second rook.
This pattern fires in 31 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 666 to 2642, with a median rating of 1104. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_1723 |
|---|---|
| Puzzles where it fires | 31 |
| Min ELO | 666 |
| Median ELO | 1104 |
| Max ELO | 2642 |
| Coverage | 0.31% 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 zvM6y — ELO 666, themes: advantage, discoveredAttack, endgame, side to move: Black
- Puzzle 01MQ3 — ELO 834, themes: advantage, endgame, short, side to move: Black
- Puzzle zd0M3_F — ELO 842, themes: endgame, long, mate, side to move: Black
- Puzzle yv8th — ELO 864, themes: endgame, exposedKing, long, side to move: White
- Puzzle ziE5Q — ELO 992, themes: anastasiaMate, endgame, mate, side to move: Black
- Puzzle 00rYo_F — ELO 1104, themes: crushing, endgame, fork, side to move: White
- Puzzle 01jpf — ELO 1170, themes: crushing, endgame, long, side to move: White
- Puzzle zwBMB_F — ELO 1211, themes: advantage, defensiveMove, endgame, side to move: Black
- Puzzle 01yBL_M — ELO 1308, themes: advantage, endgame, long, side to move: Black
- Puzzle 02551_F — ELO 1408, themes: advantage, endgame, quietMove, 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_1723?
Active white rook controlling open files or ranks in an endgame, often alongside a second rook. 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 31 tagged puzzles (0.3% of the set), spanning Lichess ELO 666 to 2642 with a median of 1104.
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.