White rook on the back rank exposed to a pin or deflection tactic by a black queen or bishop.
SAE concept sae_9729 fires when white rook on the back rank exposed to a pin or deflection tactic by a black queen or bishop.. It appears in 267 of 9,950 Climbchess puzzles (2.7%), spanning ELO 647–2651 (median 1482).
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This page documents White rook on the back rank exposed to a pin 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:
White rook on the back rank exposed to a pin or deflection tactic by a black queen or bishop.
This pattern fires in 267 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 647 to 2651, with a median rating of 1482. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_9729 |
|---|---|
| Puzzles where it fires | 267 |
| Min ELO | 647 |
| Median ELO | 1482 |
| Max ELO | 2651 |
| Coverage | 2.68% 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 010Jc — ELO 647, themes: master, mate, mateIn1, side to move: White
- Puzzle znXzc_F — ELO 812, themes: mate, mateIn1, middlegame, side to move: Black
- Puzzle 01TPw — ELO 959, themes: mate, mateIn1, oneMove, side to move: White
- Puzzle ysqpt — ELO 1172, themes: mate, mateIn2, middlegame, side to move: White
- Puzzle zmkXj — ELO 1338, themes: mate, mateIn2, middlegame, side to move: Black
- Puzzle zOSps_M — ELO 1482, themes: mate, mateIn2, middlegame, side to move: Black
- Puzzle 0253Z_F — ELO 1586, themes: advantage, long, middlegame, side to move: White
- Puzzle zwJb4_F — ELO 1807, themes: advantage, defensiveMove, hangingPiece, side to move: Black
- Puzzle yDr0i — ELO 2027, themes: advantage, interference, opening, side to move: White
- Puzzle zvXHb_F — ELO 2182, themes: exposedKing, kingsideAttack, long, 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_9729?
White rook on the back rank exposed to a pin or deflection tactic by a black queen or bishop. 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 267 tagged puzzles (2.7% of the set), spanning Lichess ELO 647 to 2651 with a median of 1482.
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.