An active white knight on an advanced or central square (e5, d6, f6), typically participating in a mating attack or fork threat.
SAE concept sae_26536 fires when an active white knight on an advanced or central square (e5, d6, f6), typically participating in a mating attack or fork threat.. It appears in 13 of 9,950 Climbchess puzzles (0.1%), spanning ELO 743–1494 (median 1011).
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This page documents An active white knight on an advanced or central…, 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 active white knight on an advanced or central square (e5, d6, f6), typically participating in a mating attack or fork threat.
This pattern fires in 13 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 743 to 1494, with a median rating of 1011. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_26536 |
|---|---|
| Puzzles where it fires | 13 |
| Min ELO | 743 |
| Median ELO | 1011 |
| Max ELO | 1494 |
| Coverage | 0.13% 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 yuwgx — ELO 743, themes: endgame, hookMate, mate, side to move: Black
- Puzzle yuwgx_F — ELO 743, themes: endgame, hookMate, mate, side to move: White
- Puzzle yuwgx_M — ELO 743, themes: endgame, hookMate, mate, side to move: Black
- Puzzle zNHpH — ELO 1004, themes: arabianMate, mate, mateIn2, side to move: White
- Puzzle ziUln — ELO 1011, themes: hookMate, mate, mateIn2, side to move: Black
- Puzzle ziUln_F — ELO 1011, themes: hookMate, mate, mateIn2, side to move: White
- Puzzle ziKY4 — ELO 1125, themes: endgame, exposedKing, hookMate, side to move: Black
- Puzzle ziKY4_M — ELO 1125, themes: endgame, exposedKing, hookMate, side to move: Black
- Puzzle y9niL — ELO 1494, themes: endgame, hookMate, mate, side to move: Black
- Puzzle y9niL_F — ELO 1494, themes: endgame, hookMate, mate, 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_26536?
An active white knight on an advanced or central square (e5, d6, f6), typically participating in a mating attack or fork threat. 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 13 tagged puzzles (0.1% of the set), spanning Lichess ELO 743 to 1494 with a median of 1011.
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.