A white knight that is actively placed in a tactical position, often on an outpost or advanced square, in middlegame or mating-net positions.
SAE concept sae_28665 fires when a white knight that is actively placed in a tactical position, often on an outpost or advanced square, in middlegame or mating-net positions.. It appears in 183 of 9,950 Climbchess puzzles (1.8%), spanning ELO 612–2577 (median 1228).
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This page documents A white knight that is actively placed in a…, 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 white knight that is actively placed in a tactical position, often on an outpost or advanced square, in middlegame or mating-net positions.
This pattern fires in 183 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 612 to 2577, with a median rating of 1228. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_28665 |
|---|---|
| Puzzles where it fires | 183 |
| Min ELO | 612 |
| Median ELO | 1228 |
| Max ELO | 2577 |
| Coverage | 1.84% 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 01fya — ELO 612, themes: endgame, mate, mateIn1, side to move: Black
- Puzzle zhzVl_M — ELO 878, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle zydPK_F — ELO 966, themes: kingsideAttack, mate, mateIn1, side to move: White
- Puzzle zdikK — ELO 1063, themes: mate, mateIn1, middlegame, side to move: White
- Puzzle 01oZW — ELO 1163, themes: mate, mateIn1, middlegame, side to move: White
- Puzzle zxCPw_F — ELO 1228, themes: advantage, discoveredAttack, kingsideAttack, side to move: White
- Puzzle zzqEL — ELO 1343, themes: advantage, fork, middlegame, side to move: White
- Puzzle ygtci_M — ELO 1556, themes: endgame, hookMate, mate, side to move: Black
- Puzzle zyyyq_F — ELO 1750, themes: crushing, fork, long, side to move: Black
- Puzzle zzyOe — ELO 2141, themes: advantage, defensiveMove, endgame, 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_28665?
A white knight that is actively placed in a tactical position, often on an outpost or advanced square, in middlegame or mating-net positions. 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 183 tagged puzzles (1.8% of the set), spanning Lichess ELO 612 to 2577 with a median of 1228.
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.