White king on the back rank (e1–g1 area) in a tactical position with active white pieces nearby.
SAE concept sae_953 fires when white king on the back rank (e1–g1 area) in a tactical position with active white pieces nearby.. It appears in 966 of 9,950 Climbchess puzzles (9.7%), spanning ELO 612–2694 (median 1532).
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This page documents White king on the back rank (e1–g1 area) in a…, 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 the back rank (e1–g1 area) in a tactical position with active white pieces nearby.
This pattern fires in 966 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 612 to 2694, with a median rating of 1532. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_953 |
|---|---|
| Puzzles where it fires | 966 |
| Min ELO | 612 |
| Median ELO | 1532 |
| Max ELO | 2694 |
| Coverage | 9.71% 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 01fya_M — ELO 612, themes: endgame, mate, mateIn1, side to move: Black
- Puzzle tnwdm — ELO 830, themes: crushing, exposedKing, long, side to move: White
- Puzzle 00Htd — ELO 954, themes: crushing, intermezzo, opening, side to move: White
- Puzzle zTBtn_F — ELO 1159, themes: endgame, exposedKing, long, side to move: White
- Puzzle z6ZVe — ELO 1383, themes: advantage, attraction, long, side to move: Black
- Puzzle ywKkx — ELO 1532, themes: kingsideAttack, mate, mateIn2, side to move: Black
- Puzzle 00gym_F — ELO 1754, themes: advantage, fork, long, side to move: White
- Puzzle zxl9W — ELO 1991, themes: advantage, interference, long, side to move: White
- Puzzle zxZMI_M — ELO 2217, themes: advantage, clearance, discoveredAttack, side to move: Black
- Puzzle kHMy1_F — ELO 2428, themes: anastasiaMate, attraction, kingsideAttack, 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_953?
White king on the back rank (e1–g1 area) in a tactical position with active white pieces nearby. 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 966 tagged puzzles (9.7% of the set), spanning Lichess ELO 612 to 2694 with a median of 1532.
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.