Black rook on an active central or kingside file (d8–h8 range), not necessarily on its starting square.
SAE concept sae_28471 fires when black rook on an active central or kingside file (d8–h8 range), not necessarily on its starting square.. It appears in 508 of 9,950 Climbchess puzzles (5.1%), spanning ELO 644–2698 (median 1762).
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This page documents Black rook on an active central or kingside file…, 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 rook on an active central or kingside file (d8–h8 range), not necessarily on its starting square.
This pattern fires in 508 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 644 to 2698, with a median rating of 1762. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_28471 |
|---|---|
| Puzzles where it fires | 508 |
| Min ELO | 644 |
| Median ELO | 1762 |
| Max ELO | 2698 |
| Coverage | 5.11% 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 zVlCK — ELO 644, themes: anastasiaMate, endgame, mate, side to move: Black
- Puzzle ZHQ2o — ELO 872, themes: crushing, hangingPiece, interference, side to move: White
- Puzzle 01DHd — ELO 1134, themes: crushing, kingsideAttack, opening, side to move: Black
- Puzzle zxU2f_F — ELO 1386, themes: kingsideAttack, long, mate, side to move: Black
- Puzzle zwDHP — ELO 1578, themes: advantage, interference, master, side to move: White
- Puzzle zLXlE — ELO 1762, themes: advantage, clearance, exposedKing, side to move: White
- Puzzle zzur6_M — ELO 1948, themes: advantage, attraction, kingsideAttack, side to move: Black
- Puzzle z5aBt — ELO 2123, themes: discoveredAttack, discoveredCheck, intermezzo, side to move: Black
- Puzzle zbTXS_F — ELO 2410, themes: long, mate, mateIn3, side to move: White
- Puzzle ziTaL_F — ELO 2539, themes: crushing, kingsideAttack, 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_28471?
Black rook on an active central or kingside file (d8–h8 range), not necessarily on its starting square. 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 508 tagged puzzles (5.1% of the set), spanning Lichess ELO 644 to 2698 with a median of 1762.
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.