White Queen on the 1st or 2nd rank, unthreatened by black and defended by at least one white piece, typically in the opening or early middlegame.
SAE concept sae_3802 fires when white Queen on the 1st or 2nd rank, unthreatened by black and defended by at least one white piece, typically in the opening or early middlegame.. It appears in 6,134 of 9,950 Climbchess puzzles (61.6%), spanning ELO 610–2698 (median 1659).
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This page documents White Queen on the 1st or 2nd rank, unthreatened…, 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 Queen on the 1st or 2nd rank, unthreatened by black and defended by at least one white piece, typically in the opening or early middlegame.
This pattern fires in 6,134 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 610 to 2698, with a median rating of 1659. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_3802 |
|---|---|
| Puzzles where it fires | 6,134 |
| Min ELO | 610 |
| Median ELO | 1659 |
| Max ELO | 2698 |
| Coverage | 61.65% 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 y0yRS_M — ELO 895, themes: crushing, defensiveMove, middlegame, side to move: Black
- Puzzle zy5rc_F — ELO 1124, themes: backRankMate, endgame, long, side to move: White
- Puzzle yb5mp_M — ELO 1325, themes: discoveredCheck, doubleCheck, long, side to move: White
- Puzzle yurHw — ELO 1498, themes: advantage, attraction, deflection, side to move: Black
- Puzzle yP800_F — ELO 1659, themes: anastasiaMate, attraction, kingsideAttack, side to move: White
- Puzzle 021Au_F — ELO 1856, themes: advantage, discoveredAttack, master, side to move: White
- Puzzle zzhlT — ELO 2067, themes: crushing, exposedKing, middlegame, side to move: Black
- Puzzle zg0w4 — ELO 2248, themes: backRankMate, endgame, mate, side to move: Black
- Puzzle ymyKz_F — ELO 2461, themes: advantage, middlegame, queensideAttack, 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_3802?
White Queen on the 1st or 2nd rank, unthreatened by black and defended by at least one white piece, typically in the opening or early middlegame. 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 6,134 tagged puzzles (61.6% of the set), spanning Lichess ELO 610 to 2698 with a median of 1659.
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.