Active white knight in or near the centre that is involved in a tactical exchange or outpost contest against black pieces.
SAE concept sae_38491 fires when active white knight in or near the centre that is involved in a tactical exchange or outpost contest against black pieces.. It appears in 14 of 9,950 Climbchess puzzles (0.1%), spanning ELO 808–2111 (median 1690).
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This page documents Active white knight in or near the centre that…, 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:
Active white knight in or near the centre that is involved in a tactical exchange or outpost contest against black pieces.
This pattern fires in 14 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 808 to 2111, with a median rating of 1690. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_38491 |
|---|---|
| Puzzles where it fires | 14 |
| Min ELO | 808 |
| Median ELO | 1690 |
| Max ELO | 2111 |
| Coverage | 0.14% 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 zx0yA — ELO 808, themes: crushing, discoveredAttack, endgame, side to move: White
- Puzzle zx0yA_F — ELO 808, themes: crushing, discoveredAttack, endgame, side to move: Black
- Puzzle 01JzG — ELO 1410, themes: crushing, discoveredAttack, endgame, side to move: White
- Puzzle xbz0L — ELO 1508, themes: crushing, hangingPiece, long, side to move: Black
- Puzzle xbz0L_F — ELO 1508, themes: crushing, hangingPiece, long, side to move: White
- Puzzle zkFtz — ELO 1690, themes: crushing, endgame, long, side to move: White
- Puzzle zkFtz_F — ELO 1690, themes: crushing, endgame, long, side to move: Black
- Puzzle 00Qog — ELO 2057, themes: crushing, middlegame, short, side to move: White
- Puzzle 00Qog_M — ELO 2057, themes: crushing, middlegame, short, side to move: White
- Puzzle zfCs7 — ELO 2111, themes: advantage, discoveredAttack, discoveredCheck, 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_38491?
Active white knight in or near the centre that is involved in a tactical exchange or outpost contest against black pieces. 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 14 tagged puzzles (0.1% of the set), spanning Lichess ELO 808 to 2111 with a median of 1690.
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.