A black knight active in enemy territory, often participating in a mating combination or fork.
SAE concept sae_1354 fires when a black knight active in enemy territory, often participating in a mating combination or fork.. It appears in 1,548 of 9,950 Climbchess puzzles (15.6%), spanning ELO 613–2698 (median 1576).
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This page documents A black knight active in enemy territory, often…, 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 black knight active in enemy territory, often participating in a mating combination or fork.
This pattern fires in 1,548 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 613 to 2698, with a median rating of 1576. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_1354 |
|---|---|
| Puzzles where it fires | 1,548 |
| Min ELO | 613 |
| Median ELO | 1576 |
| Max ELO | 2698 |
| Coverage | 15.56% 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 xbPL4 — ELO 613, themes: anastasiaMate, endgame, mate, side to move: White
- Puzzle zRNq9_F — ELO 851, themes: endgame, mate, mateIn1, side to move: Black
- Puzzle zzNZF_F — ELO 975, themes: kingsideAttack, mate, mateIn2, side to move: White
- Puzzle 00Ta0_M — ELO 1178, themes: crushing, endgame, fork, side to move: White
- Puzzle zi0Ur_M — ELO 1390, themes: backRankMate, endgame, mate, side to move: White
- Puzzle zzAkG — ELO 1576, themes: crushing, deflection, long, side to move: White
- Puzzle zyD4h_M — ELO 1809, themes: advantage, discoveredAttack, kingsideAttack, side to move: Black
- Puzzle yzTAz_F — ELO 1969, themes: advantage, endgame, fork, side to move: White
- Puzzle sBIAf — ELO 2188, themes: arabianMate, kingsideAttack, long, side to move: Black
- Puzzle ztwnL — ELO 2444, themes: kingsideAttack, mate, mateIn5, 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_1354?
A black knight active in enemy territory, often participating in a mating combination or fork. 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 1,548 tagged puzzles (15.6% of the set), spanning Lichess ELO 613 to 2698 with a median of 1576.
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.