Advanced pawn endgame with promotion threats, typically featuring passed pawns and king-versus-king opposition.
SAE concept sae_17548 fires when advanced pawn endgame with promotion threats, typically featuring passed pawns and king-versus-king opposition.. It appears in 136 of 9,950 Climbchess puzzles (1.4%), spanning ELO 650–2641 (median 1631).
Free forever · no email · no signup · delete data anytime.
This page documents Advanced pawn endgame with promotion threats…, 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 pawn endgame with promotion threats, typically featuring passed pawns and king-versus-king opposition.
This pattern fires in 136 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 650 to 2641, with a median rating of 1631. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_17548 |
|---|---|
| Puzzles where it fires | 136 |
| Min ELO | 650 |
| Median ELO | 1631 |
| Max ELO | 2641 |
| Coverage | 1.37% 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 OgxTs — ELO 650, themes: advancedPawn, bishopEndgame, crushing, side to move: White
- Puzzle 015Ft_F — ELO 768, themes: advancedPawn, crushing, endgame, side to move: Black
- Puzzle 00L84 — ELO 1107, themes: advancedPawn, crushing, endgame, side to move: White
- Puzzle zZUsP — ELO 1206, themes: advancedPawn, crushing, defensiveMove, side to move: White
- Puzzle zbsss_M — ELO 1554, themes: advancedPawn, crushing, endgame, side to move: White
- Puzzle zzyrN_M — ELO 1631, themes: advancedPawn, crushing, endgame, side to move: White
- Puzzle zu3yM_F — ELO 1743, themes: advancedPawn, advantage, endgame, side to move: Black
- Puzzle zsN9q — ELO 1894, themes: crushing, deflection, endgame, side to move: Black
- Puzzle zYKJq — ELO 2135, themes: crushing, endgame, pawnEndgame, side to move: White
- Puzzle zsYW7_F — ELO 2405, themes: crushing, defensiveMove, 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_17548?
Advanced pawn endgame with promotion threats, typically featuring passed pawns and king-versus-king opposition. 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 136 tagged puzzles (1.4% of the set), spanning Lichess ELO 650 to 2641 with a median of 1631.
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.