An advanced passed pawn on the 6th or 7th rank under attack, where the attacker aims to capture or blockade it.
SAE concept sae_12295 fires when an advanced passed pawn on the 6th or 7th rank under attack, where the attacker aims to capture or blockade it.. It appears in 19 of 9,950 Climbchess puzzles (0.2%), spanning ELO 955–2280 (median 1415).
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This page documents An advanced passed pawn on the 6th or 7th rank…, 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:
An advanced passed pawn on the 6th or 7th rank under attack, where the attacker aims to capture or blockade it.
This pattern fires in 19 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 955 to 2280, with a median rating of 1415. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_12295 |
|---|---|
| Puzzles where it fires | 19 |
| Min ELO | 955 |
| Median ELO | 1415 |
| Max ELO | 2280 |
| Coverage | 0.19% 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 zztdS — ELO 955, themes: crushing, deflection, endgame, side to move: White
- Puzzle zztdS_F — ELO 955, themes: crushing, deflection, endgame, side to move: Black
- Puzzle zz6sD — ELO 961, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle zz6sD_M — ELO 961, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle ya9YL_F — ELO 1172, themes: bishopEndgame, crushing, endgame, side to move: White
- Puzzle zyFs4 — ELO 1415, themes: advancedPawn, crushing, deflection, side to move: White
- Puzzle zyFs4_M — ELO 1415, themes: advancedPawn, crushing, deflection, side to move: White
- Puzzle zyDuF_F — ELO 1638, themes: advancedPawn, endgame, mate, side to move: Black
- Puzzle zyv2u_F — ELO 1969, themes: advancedPawn, crushing, endgame, side to move: Black
- Puzzle zx2dq_M — ELO 2180, 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_12295?
An advanced passed pawn on the 6th or 7th rank under attack, where the attacker aims to capture or blockade it. 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 19 tagged puzzles (0.2% of the set), spanning Lichess ELO 955 to 2280 with a median of 1415.
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.