A king on its original or castled square (e1/e8/g1/g8) in a position with active enemy threats nearby, not necessarily a direct attack.
SAE concept sae_36100 fires when a king on its original or castled square (e1/e8/g1/g8) in a position with active enemy threats nearby, not necessarily a direct attack.. It appears in 222 of 9,950 Climbchess puzzles (2.2%), spanning ELO 610–2690 (median 1598).
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This page documents A king on its original or castled 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 king on its original or castled square (e1/e8/g1/g8) in a position with active enemy threats nearby, not necessarily a direct attack.
This pattern fires in 222 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 610 to 2690, with a median rating of 1598. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_36100 |
|---|---|
| Puzzles where it fires | 222 |
| Min ELO | 610 |
| Median ELO | 1598 |
| Max ELO | 2690 |
| Coverage | 2.23% 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 xRhy5 — ELO 610, themes: advantage, endgame, master, side to move: Black
- Puzzle zrmSZ_F — ELO 851, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle zipga_M — ELO 1081, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle zwteV_F — ELO 1256, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle zuzGu_M — ELO 1429, themes: advantage, endgame, hangingPiece, side to move: White
- Puzzle 028i2_M — ELO 1598, themes: advantage, endgame, long, side to move: Black
- Puzzle zyD4h_F — ELO 1809, themes: advantage, discoveredAttack, kingsideAttack, side to move: White
- Puzzle ztRfK — ELO 2043, themes: advantage, hangingPiece, middlegame, side to move: Black
- Puzzle yyuoZ_M — ELO 2249, themes: crushing, discoveredAttack, discoveredCheck, side to move: White
- Puzzle wUL1J_F — ELO 2549, themes: arabianMate, defensiveMove, master, 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_36100?
A king on its original or castled square (e1/e8/g1/g8) in a position with active enemy threats nearby, not necessarily a direct attack. 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 222 tagged puzzles (2.2% of the set), spanning Lichess ELO 610 to 2690 with a median of 1598.
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.