Detects a rook actively contesting or supporting an advanced passed pawn, typically in an endgame where promotion is the decisive factor.
SAE concept sae_19183 fires when detects a rook actively contesting or supporting an advanced passed pawn, typically in an endgame where promotion is the decisive factor.. It appears in 79 of 9,950 Climbchess puzzles (0.8%), spanning ELO 690–2572 (median 1619).
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This page documents Detects a rook actively contesting or supporting…, 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:
Detects a rook actively contesting or supporting an advanced passed pawn, typically in an endgame where promotion is the decisive factor.
This pattern fires in 79 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 690 to 2572, with a median rating of 1619. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_19183 |
|---|---|
| Puzzles where it fires | 79 |
| Min ELO | 690 |
| Median ELO | 1619 |
| Max ELO | 2572 |
| Coverage | 0.79% 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 zS9Ch — ELO 690, themes: advancedPawn, crushing, deflection, side to move: Black
- Puzzle 00L84_F — ELO 1107, themes: advancedPawn, crushing, endgame, side to move: Black
- Puzzle zwteV_F — ELO 1256, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle zhxaA — ELO 1379, themes: advantage, endgame, short, side to move: White
- Puzzle zbsss_M — ELO 1554, themes: advancedPawn, crushing, endgame, side to move: White
- Puzzle zwRKt_M — ELO 1619, themes: crushing, endgame, exposedKing, side to move: Black
- Puzzle zP4Oi_F — ELO 2015, themes: advancedPawn, crushing, endgame, side to move: Black
- Puzzle ztVfo_M — ELO 2174, themes: advancedPawn, crushing, defensiveMove, side to move: White
- Puzzle zzoES_F — ELO 2418, themes: advancedPawn, advantage, endgame, side to move: White
- Puzzle znNui_F — ELO 2456, themes: advancedPawn, advantage, defensiveMove, 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_19183?
Detects a rook actively contesting or supporting an advanced passed pawn, typically in an endgame where promotion is the decisive factor. 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 79 tagged puzzles (0.8% of the set), spanning Lichess ELO 690 to 2572 with a median of 1619.
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.