Detects an active knight (either colour) near the centre or enemy king, participating in a mating attack, with at most one enemy attacker.
SAE concept sae_160 fires when detects an active knight (either colour) near the centre or enemy king, participating in a mating attack, with at most one enemy attacker.. It appears in 65 of 9,950 Climbchess puzzles (0.7%), spanning ELO 685–2601 (median 1329).
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This page documents Detects an active knight (either colour) near…, 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 an active knight (either colour) near the centre or enemy king, participating in a mating attack, with at most one enemy attacker.
This pattern fires in 65 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 685 to 2601, with a median rating of 1329. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_160 |
|---|---|
| Puzzles where it fires | 65 |
| Min ELO | 685 |
| Median ELO | 1329 |
| Max ELO | 2601 |
| Coverage | 0.65% 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 usVmK — ELO 685, themes: arabianMate, endgame, master, side to move: Black
- Puzzle p7zW1 — ELO 793, themes: arabianMate, kingsideAttack, mate, side to move: Black
- Puzzle zyO1w — ELO 1056, themes: crushing, deflection, discoveredAttack, side to move: Black
- Puzzle zsB7k — ELO 1173, themes: mate, mateIn2, middlegame, side to move: White
- Puzzle zzglb_F — ELO 1218, themes: doubleCheck, kingsideAttack, mate, side to move: Black
- Puzzle yBmYy_F — ELO 1329, themes: discoveredCheck, doubleCheck, kingsideAttack, side to move: White
- Puzzle xz4wQ — ELO 1529, themes: doubleCheck, kingsideAttack, long, side to move: White
- Puzzle zG3oY_F — ELO 1579, themes: discoveredCheck, doubleCheck, kingsideAttack, side to move: Black
- Puzzle zw5sB — ELO 2342, themes: endgame, long, mate, side to move: White
- Puzzle kHMy1_F — ELO 2428, themes: anastasiaMate, attraction, kingsideAttack, 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_160?
Detects an active knight (either colour) near the centre or enemy king, participating in a mating attack, with at most one enemy attacker. 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 65 tagged puzzles (0.7% of the set), spanning Lichess ELO 685 to 2601 with a median of 1329.
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.