Tactical positions featuring knight vulnerability or knight-based mating patterns, with a knight under pressure from opposing forces.
SAE concept sae_9098 fires when tactical positions featuring knight vulnerability or knight-based mating patterns, with a knight under pressure from opposing forces.. It appears in 235 of 9,950 Climbchess puzzles (2.4%), spanning ELO 626–2688 (median 1551).
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This page documents Tactical positions featuring knight…, 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:
Tactical positions featuring knight vulnerability or knight-based mating patterns, with a knight under pressure from opposing forces.
This pattern fires in 235 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 626 to 2688, with a median rating of 1551. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_9098 |
|---|---|
| Puzzles where it fires | 235 |
| Min ELO | 626 |
| Median ELO | 1551 |
| Max ELO | 2688 |
| Coverage | 2.36% 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 zSBhc_M — ELO 626, themes: backRankMate, mate, mateIn2, side to move: Black
- Puzzle yuHdG_F — ELO 956, themes: anastasiaMate, endgame, mate, side to move: Black
- Puzzle zxhbW — ELO 1108, themes: crushing, deflection, endgame, side to move: Black
- Puzzle zwhGK — ELO 1307, themes: advancedPawn, discoveredCheck, doubleCheck, side to move: White
- Puzzle 01K12_F — ELO 1385, themes: advantage, kingsideAttack, long, side to move: Black
- Puzzle zuUe8_M — ELO 1551, themes: advantage, interference, long, side to move: Black
- Puzzle 01olo_F — ELO 1762, themes: advantage, long, middlegame, side to move: White
- Puzzle zvgYL — ELO 2016, themes: crushing, kingsideAttack, middlegame, side to move: White
- Puzzle zkVlK_F — ELO 2108, themes: advantage, long, middlegame, side to move: White
- Puzzle PHKi3_F — ELO 2407, themes: backRankMate, deflection, long, 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_9098?
Tactical positions featuring knight vulnerability or knight-based mating patterns, with a knight under pressure from opposing forces. 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 235 tagged puzzles (2.4% of the set), spanning Lichess ELO 626 to 2688 with a median of 1551.
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.