King opposition or king centralisation in a pawn endgame, where the active king steps into a contested zone.
SAE concept sae_38146 fires when king opposition or king centralisation in a pawn endgame, where the active king steps into a contested zone.. It appears in 3 of 9,950 Climbchess puzzles (0.0%), spanning ELO 1004–1619 (median 1004).
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This page documents King opposition or king centralisation in a pawn…, 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:
King opposition or king centralisation in a pawn endgame, where the active king steps into a contested zone.
This pattern fires in 3 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 1004 to 1619, with a median rating of 1004. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_38146 |
|---|---|
| Puzzles where it fires | 3 |
| Min ELO | 1004 |
| Median ELO | 1004 |
| Max ELO | 1619 |
| Coverage | 0.03% 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 3 puzzles spanning the rating distribution. Each links to its own page with full move list and related concepts.
- Puzzle zxAbw — ELO 1004, themes: advantage, endgame, long, side to move: Black
- Puzzle zxAbw_F — ELO 1004, themes: advantage, endgame, long, side to move: White
- Puzzle zxGvO_M — ELO 1619, themes: attraction, crushing, deflection, side to move: Black
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_38146?
King opposition or king centralisation in a pawn endgame, where the active king steps into a contested zone. 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 3 tagged puzzles (0.0% of the set), spanning Lichess ELO 1004 to 1619 with a median of 1004.
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.