King facing a positional queen threat requiring an immediate defensive queen move.
SAE concept sae_8945 fires when king facing a positional queen threat requiring an immediate defensive queen move.. It appears in 17 of 9,950 Climbchess puzzles (0.2%), spanning ELO 851–2690 (median 1081).
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This page documents King facing a positional queen threat requiring…, 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:
King facing a positional queen threat requiring an immediate defensive queen move.
This pattern fires in 17 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 851 to 2690, with a median rating of 1081. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_8945 |
|---|---|
| Puzzles where it fires | 17 |
| Min ELO | 851 |
| Median ELO | 1081 |
| Max ELO | 2690 |
| Coverage | 0.17% 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 zrmSZ — ELO 851, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle zrmSZ_F — ELO 851, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle y0yRS — ELO 895, themes: crushing, defensiveMove, middlegame, side to move: Black
- Puzzle y0yRS_M — ELO 895, themes: crushing, defensiveMove, middlegame, side to move: Black
- Puzzle zipga — ELO 1081, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle zipga_M — ELO 1081, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle zz2pb_F — ELO 1383, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle zwdQj — ELO 1670, themes: crushing, defensiveMove, long, side to move: White
- Puzzle zwdQj_M — ELO 1670, themes: crushing, defensiveMove, long, side to move: White
- Puzzle wbJ9P_F — ELO 2690, themes: crushing, deflection, master, 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_8945?
King facing a positional queen threat requiring an immediate defensive queen move. 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 17 tagged puzzles (0.2% of the set), spanning Lichess ELO 851 to 2690 with a median of 1081.
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.