Detects a rook-and-pawn endgame with a dangerous advanced pawn (either colour) near promotion, often with opposing rooks contesting the file.
SAE concept sae_3186 fires when detects a rook-and-pawn endgame with a dangerous advanced pawn (either colour) near promotion, often with opposing rooks contesting the file.. It appears in 11 of 9,950 Climbchess puzzles (0.1%), spanning ELO 688–2655 (median 1508).
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This page documents Detects a rook-and-pawn endgame with a dangerous…, 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-and-pawn endgame with a dangerous advanced pawn (either colour) near promotion, often with opposing rooks contesting the file.
This pattern fires in 11 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 688 to 2655, with a median rating of 1508. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_3186 |
|---|---|
| Puzzles where it fires | 11 |
| Min ELO | 688 |
| Median ELO | 1508 |
| Max ELO | 2655 |
| Coverage | 0.11% 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 zutuc — ELO 688, themes: endgame, long, mate, side to move: White
- Puzzle zutuc_F — ELO 688, themes: endgame, long, mate, side to move: Black
- Puzzle zu5IY — ELO 888, themes: deflection, endgame, mate, side to move: Black
- Puzzle zu5IY_F — ELO 888, themes: deflection, endgame, mate, side to move: White
- Puzzle zu5IY_M — ELO 888, themes: deflection, endgame, mate, side to move: Black
- Puzzle wM7wj_M — ELO 1508, themes: discoveredAttack, discoveredCheck, endgame, side to move: White
- Puzzle zf5yy — ELO 2135, themes: endgame, mate, mateIn2, side to move: Black
- Puzzle zf5yy_F — ELO 2135, themes: endgame, mate, mateIn2, side to move: White
- Puzzle zf5yy_M — ELO 2135, themes: endgame, mate, mateIn2, side to move: Black
- Puzzle zWdty — ELO 2655, themes: endgame, long, mate, 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_3186?
Detects a rook-and-pawn endgame with a dangerous advanced pawn (either colour) near promotion, often with opposing rooks contesting the file. 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 11 tagged puzzles (0.1% of the set), spanning Lichess ELO 688 to 2655 with a median of 1508.
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.