A white passed pawn on the 5th to 7th rank with promotion potential.
SAE concept sae_10145 fires when a white passed pawn on the 5th to 7th rank with promotion potential.. It appears in 137 of 9,950 Climbchess puzzles (1.4%), spanning ELO 663–2553 (median 1720).
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This page documents A white passed pawn on the 5th to 7th rank with…, 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:
A white passed pawn on the 5th to 7th rank with promotion potential.
This pattern fires in 137 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 663 to 2553, with a median rating of 1720. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_10145 |
|---|---|
| Puzzles where it fires | 137 |
| Min ELO | 663 |
| Median ELO | 1720 |
| Max ELO | 2553 |
| Coverage | 1.38% 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 z9HTk — ELO 663, themes: advancedPawn, advantage, defensiveMove, side to move: White
- Puzzle zztdS_F — ELO 955, themes: crushing, deflection, endgame, side to move: Black
- Puzzle zjv01 — ELO 1289, themes: advancedPawn, advantage, long, side to move: Black
- Puzzle zhrMv_M — ELO 1485, themes: advancedPawn, crushing, endgame, side to move: Black
- Puzzle znTAQ — ELO 1626, themes: advancedPawn, attraction, crushing, side to move: White
- Puzzle zq18C_M — ELO 1720, themes: advancedPawn, advantage, endgame, side to move: Black
- Puzzle zlbkl_M — ELO 1909, themes: advancedPawn, crushing, endgame, side to move: Black
- Puzzle zr5NK — ELO 2057, themes: advancedPawn, crushing, endgame, side to move: Black
- Puzzle zW1fK_M — ELO 2312, themes: advancedPawn, crushing, defensiveMove, side to move: Black
- Puzzle zgWr1_F — ELO 2475, themes: advancedPawn, crushing, endgame, 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_10145?
A white passed pawn on the 5th to 7th rank with promotion potential. 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 137 tagged puzzles (1.4% of the set), spanning Lichess ELO 663 to 2553 with a median of 1720.
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.