A knight on an outpost or advanced square that is actively contested between the two sides.
SAE concept sae_24178 fires when a knight on an outpost or advanced square that is actively contested between the two sides.. It appears in 85 of 9,950 Climbchess puzzles (0.9%), spanning ELO 642–2525 (median 1290).
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This page documents A knight on an outpost or advanced square 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:
A knight on an outpost or advanced square that is actively contested between the two sides.
This pattern fires in 85 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 642 to 2525, with a median rating of 1290. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_24178 |
|---|---|
| Puzzles where it fires | 85 |
| Min ELO | 642 |
| Median ELO | 1290 |
| Max ELO | 2525 |
| Coverage | 0.85% 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 zt2mj — ELO 642, themes: advantage, discoveredAttack, endgame, side to move: White
- Puzzle yt8Fy — ELO 903, themes: anastasiaMate, endgame, mate, side to move: Black
- Puzzle zZf24 — ELO 964, themes: arabianMate, mate, mateIn2, side to move: Black
- Puzzle 00rYo — ELO 1104, themes: crushing, endgame, fork, side to move: Black
- Puzzle zTBtn — ELO 1159, themes: endgame, exposedKing, long, side to move: Black
- Puzzle zu0eu — ELO 1290, themes: crushing, deflection, endgame, side to move: Black
- Puzzle zox1E_F — ELO 1547, themes: advantage, attraction, master, side to move: White
- Puzzle zxAZu_F — ELO 1658, themes: attraction, crushing, endgame, side to move: Black
- Puzzle 01Vmt_F — ELO 1908, themes: advantage, endgame, fork, side to move: White
- Puzzle SiHuz_M — ELO 2002, themes: anastasiaMate, endgame, mate, 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_24178?
A knight on an outpost or advanced square that is actively contested between the two sides. 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 85 tagged puzzles (0.9% of the set), spanning Lichess ELO 642 to 2525 with a median of 1290.
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.