White King on g1, defended by exactly one white piece, with no black attackers.
SAE concept sae_6608 fires when white King on g1, defended by exactly one white piece, with no black attackers.. It appears in 193 of 9,950 Climbchess puzzles (1.9%), spanning ELO 704–2631 (median 1625).
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This page documents White King on g1, defended by exactly one white…, 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:
White King on g1, defended by exactly one white piece, with no black attackers.
This pattern fires in 193 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 704 to 2631, with a median rating of 1625. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_6608 |
|---|---|
| Puzzles where it fires | 193 |
| Min ELO | 704 |
| Median ELO | 1625 |
| Max ELO | 2631 |
| Coverage | 1.94% 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 zgUev — ELO 704, themes: backRankMate, mate, mateIn2, side to move: White
- Puzzle 00eNe_M — ELO 885, themes: kingsideAttack, mate, mateIn2, side to move: White
- Puzzle ztLyp_F — ELO 1166, themes: backRankMate, endgame, long, side to move: Black
- Puzzle 028W0 — ELO 1382, themes: endgame, mate, mateIn2, side to move: Black
- Puzzle zskVk_M — ELO 1480, themes: discoveredCheck, doubleCheck, kingsideAttack, side to move: Black
- Puzzle zufFx — ELO 1625, themes: attraction, crushing, fork, side to move: Black
- Puzzle zugb8_F — ELO 1910, themes: advantage, attraction, fork, side to move: Black
- Puzzle xACSw — ELO 2142, themes: doubleBishopMate, kingsideAttack, mate, side to move: White
- Puzzle 01Tpw_F — ELO 2342, themes: advancedPawn, advantage, long, side to move: Black
- Puzzle z4hov — ELO 2483, themes: advantage, long, middlegame, 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_6608?
White King on g1, defended by exactly one white piece, with no 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 193 tagged puzzles (1.9% of the set), spanning Lichess ELO 704 to 2631 with a median of 1625.
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.