White knight on b1 or g1, defended by at least one white piece, with no black attackers.
SAE concept sae_18318 fires when white knight on b1 or g1, defended by at least one white piece, with no black attackers.. It appears in 115 of 9,950 Climbchess puzzles (1.2%), spanning ELO 654–2498 (median 1383).
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This page documents White knight on b1 or g1, defended by at least…, 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:
White knight on b1 or g1, defended by at least one white piece, with no black attackers.
This pattern fires in 115 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 654 to 2498, with a median rating of 1383. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_18318 |
|---|---|
| Puzzles where it fires | 115 |
| Min ELO | 654 |
| Median ELO | 1383 |
| Max ELO | 2498 |
| Coverage | 1.16% 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 01EfV — ELO 654, themes: mate, mateIn1, middlegame, side to move: White
- Puzzle 027IA — ELO 819, themes: mate, mateIn1, oneMove, side to move: Black
- Puzzle 00RoG — ELO 1045, themes: mate, mateIn1, oneMove, side to move: White
- Puzzle zx8XN — ELO 1157, themes: crushing, deflection, middlegame, side to move: White
- Puzzle zearU — ELO 1308, themes: mate, mateIn1, oneMove, side to move: White
- Puzzle z6ZVe_M — ELO 1383, themes: advantage, attraction, long, side to move: Black
- Puzzle zzrd7_M — ELO 1491, themes: endgame, mate, mateIn2, side to move: Black
- Puzzle 01wG2 — ELO 1600, themes: advantage, long, middlegame, side to move: White
- Puzzle zzkPA_M — ELO 1718, themes: advantage, kingsideAttack, middlegame, side to move: White
- Puzzle zEQJa_M — ELO 1877, themes: mate, mateIn1, oneMove, 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_18318?
White knight on b1 or g1, defended by at least one white piece, with no black attackers. 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 115 tagged puzzles (1.2% of the set), spanning Lichess ELO 654 to 2498 with a median of 1383.
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.