Detects positions with an active white knight on an outpost square (typically rank 5-6), often in endgames or tactical mateIn1 puzzles.
SAE concept sae_3791 fires when detects positions with an active white knight on an outpost square (typically rank 5-6), often in endgames or tactical mateIn1 puzzles.. It appears in 683 of 9,950 Climbchess puzzles (6.9%), spanning ELO 621–2696 (median 1600).
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This page documents Detects positions with an active white knight on…, 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:
Detects positions with an active white knight on an outpost square (typically rank 5-6), often in endgames or tactical mateIn1 puzzles.
This pattern fires in 683 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 621 to 2696, with a median rating of 1600. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_3791 |
|---|---|
| Puzzles where it fires | 683 |
| Min ELO | 621 |
| Median ELO | 1600 |
| Max ELO | 2696 |
| Coverage | 6.86% 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 veb0b — ELO 621, themes: arabianMate, endgame, mate, side to move: Black
- Puzzle zxT4U — ELO 849, themes: crushing, endgame, fork, side to move: White
- Puzzle 00cud_M — ELO 960, themes: crushing, endgame, fork, side to move: Black
- Puzzle ztpK4 — ELO 1185, themes: clearance, exposedKing, long, side to move: White
- Puzzle yDtkU_F — ELO 1391, themes: hookMate, mate, mateIn1, side to move: White
- Puzzle wtZdr — ELO 1600, themes: endgame, hookMate, mate, side to move: White
- Puzzle zxcG7_M — ELO 1813, themes: crushing, endgame, fork, side to move: White
- Puzzle zg6Wq_F — ELO 1983, themes: advantage, discoveredAttack, long, side to move: White
- Puzzle zlzhC_F — ELO 2154, themes: endgame, long, mate, side to move: Black
- Puzzle zt8DQ_M — ELO 2319, themes: advantage, fork, long, 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_3791?
Detects positions with an active white knight on an outpost square (typically rank 5-6), often in endgames or tactical mateIn1 puzzles. 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 683 tagged puzzles (6.9% of the set), spanning Lichess ELO 621 to 2696 with a median of 1600.
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.