Advanced passed pawn on the 6th or 7th rank close to promotion, where control of the queening square and piece activity are decisive.
SAE concept sae_361 fires when advanced passed pawn on the 6th or 7th rank close to promotion, where control of the queening square and piece activity are decisive.. It appears in 289 of 9,950 Climbchess puzzles (2.9%), spanning ELO 610–2675 (median 1701).
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This page documents 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:
Advanced passed pawn on the 6th or 7th rank close to promotion, where control of the queening square and piece activity are decisive.
This pattern fires in 289 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 610 to 2675, with a median rating of 1701. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_361 |
|---|---|
| Puzzles where it fires | 289 |
| Min ELO | 610 |
| Median ELO | 1701 |
| Max ELO | 2675 |
| Coverage | 2.90% 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 ydABK — ELO 610, themes: crushing, endgame, hangingPiece, side to move: White
- Puzzle rhKRt_F — ELO 889, themes: advantage, endgame, knightEndgame, side to move: White
- Puzzle zzeJC — ELO 1070, themes: advancedPawn, bishopEndgame, crushing, side to move: Black
- Puzzle zwteV_M — ELO 1256, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle zzgS0_M — ELO 1481, themes: endgame, mate, mateIn1, side to move: White
- Puzzle 016F4_M — ELO 1701, themes: crushing, middlegame, veryLong, side to move: White
- Puzzle zcI82_M — ELO 1861, themes: advancedPawn, crushing, endgame, side to move: Black
- Puzzle 01gpx_F — ELO 2071, themes: advancedPawn, crushing, defensiveMove, side to move: White
- Puzzle zkUPP_M — ELO 2274, themes: advancedPawn, crushing, defensiveMove, side to move: White
- Puzzle zzoES_F — ELO 2418, themes: advancedPawn, advantage, 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_361?
Advanced passed pawn on the 6th or 7th rank close to promotion, where control of the queening square and piece activity are decisive. 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 289 tagged puzzles (2.9% of the set), spanning Lichess ELO 610 to 2675 with a median of 1701.
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.