A white knight on an outpost or advanced square that has more white defenders than black attackers.
SAE concept sae_13365 fires when a white knight on an outpost or advanced square that has more white defenders than black attackers.. It appears in 244 of 9,950 Climbchess puzzles (2.5%), spanning ELO 619–2658 (median 1742).
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This page documents A white knight on an outpost or advanced square…, 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 on an outpost or advanced square that has more white defenders than black attackers.
This pattern fires in 244 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 619 to 2658, with a median rating of 1742. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_13365 |
|---|---|
| Puzzles where it fires | 244 |
| Min ELO | 619 |
| Median ELO | 1742 |
| Max ELO | 2658 |
| Coverage | 2.45% 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 ufpHl — ELO 619, themes: arabianMate, kingsideAttack, mate, side to move: Black
- Puzzle zq1Xr_M — ELO 841, themes: arabianMate, endgame, mate, side to move: Black
- Puzzle zNHpH_M — ELO 1004, themes: arabianMate, mate, mateIn2, side to move: White
- Puzzle ztpnJ — ELO 1311, themes: endgame, mate, mateIn2, side to move: Black
- Puzzle ygtci_F — ELO 1556, themes: endgame, hookMate, mate, side to move: White
- Puzzle zgeXj_F — ELO 1742, themes: backRankMate, deflection, endgame, side to move: White
- Puzzle buq8x_F — ELO 1849, themes: kingsideAttack, mate, mateIn2, side to move: White
- Puzzle yAl9e_F — ELO 2015, themes: backRankMate, clearance, endgame, side to move: White
- Puzzle zbvtj_F — ELO 2176, themes: endgame, long, master, side to move: White
- Puzzle yFOMn_M — ELO 2328, themes: endgame, hookMate, 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_13365?
A white knight on an outpost or advanced square that has more white defenders than 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 244 tagged puzzles (2.5% of the set), spanning Lichess ELO 619 to 2658 with a median of 1742.
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.