A well-supported white knight on an outpost square that is contested by black.
SAE concept sae_2002 fires when a well-supported white knight on an outpost square that is contested by black.. It appears in 960 of 9,950 Climbchess puzzles (9.6%), spanning ELO 619–2696 (median 1605).
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This page documents A well-supported white knight on an outpost…, 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 well-supported white knight on an outpost square that is contested by black.
This pattern fires in 960 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 619 to 2696, with a median rating of 1605. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_2002 |
|---|---|
| Puzzles where it fires | 960 |
| Min ELO | 619 |
| Median ELO | 1605 |
| Max ELO | 2696 |
| Coverage | 9.65% 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 ufpHl — ELO 619, themes: arabianMate, kingsideAttack, mate, side to move: Black
- Puzzle wq1gR_M — ELO 861, themes: clearance, kingsideAttack, mate, side to move: Black
- Puzzle 00QCD_M — ELO 1041, themes: advantage, middlegame, short, side to move: Black
- Puzzle zpebV — ELO 1296, themes: exposedKing, kingsideAttack, mate, side to move: Black
- Puzzle zySyS_F — ELO 1438, themes: advantage, fork, middlegame, side to move: Black
- Puzzle zzk5z — ELO 1605, themes: advantage, intermezzo, long, side to move: White
- Puzzle zjd77 — ELO 1837, themes: crushing, master, middlegame, side to move: White
- Puzzle yDr0i_F — ELO 2027, themes: advantage, interference, opening, side to move: Black
- Puzzle zwUky_M — ELO 2203, themes: discoveredCheck, doubleCheck, kingsideAttack, side to move: White
- Puzzle zkAlv — ELO 2450, themes: advantage, long, middlegame, 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_2002?
A well-supported white knight on an outpost square that is contested by black. 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 960 tagged puzzles (9.6% of the set), spanning Lichess ELO 619 to 2696 with a median of 1605.
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.