Black rook on a8 or h8 in an uncastled or partially developed position, not yet engaged in the game.
SAE concept sae_1174 fires when black rook on a8 or h8 in an uncastled or partially developed position, not yet engaged in the game.. It appears in 627 of 9,950 Climbchess puzzles (6.3%), spanning ELO 643–2698 (median 1714).
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This page documents Black rook on a8 or h8 in an uncastled 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:
Black rook on a8 or h8 in an uncastled or partially developed position, not yet engaged in the game.
This pattern fires in 627 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 643 to 2698, with a median rating of 1714. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_1174 |
|---|---|
| Puzzles where it fires | 627 |
| Min ELO | 643 |
| Median ELO | 1714 |
| Max ELO | 2698 |
| Coverage | 6.30% 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 SZStF — ELO 882, themes: advantage, endgame, interference, side to move: Black
- Puzzle zzdgA — ELO 1095, themes: deflection, long, mate, side to move: Black
- Puzzle zz8NK — ELO 1332, themes: mate, mateIn2, opening, side to move: White
- Puzzle zyFTu_F — ELO 1573, themes: long, mate, mateIn3, side to move: Black
- Puzzle zdT9Q — ELO 1714, themes: crushing, discoveredAttack, interference, side to move: White
- Puzzle zuSK1_M — ELO 1901, themes: advantage, long, middlegame, side to move: White
- Puzzle slwa7 — ELO 2105, themes: mate, mateIn1, middlegame, side to move: Black
- Puzzle zwo3V_F — ELO 2281, themes: advantage, castling, middlegame, side to move: White
- Puzzle zDMzf_M — ELO 2482, themes: attraction, crushing, kingsideAttack, 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_1174?
Black rook on a8 or h8 in an uncastled or partially developed position, not yet engaged in the game. 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 627 tagged puzzles (6.3% of the set), spanning Lichess ELO 643 to 2698 with a median of 1714.
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.