Detects a king (either colour) cornered on the back rank in a mating-net position, typically on the a-file or queenside corner, with escape squares controlled by the opponent.
SAE concept sae_2792 fires when detects a king (either colour) cornered on the back rank in a mating-net position, typically on the a-file or queenside corner, with escape squares controlled by the opponent.. It appears in 63 of 9,950 Climbchess puzzles (0.6%), spanning ELO 670–2677 (median 1512).
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This page documents Detects a king (either colour) cornered on the…, 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:
Detects a king (either colour) cornered on the back rank in a mating-net position, typically on the a-file or queenside corner, with escape squares controlled by the opponent.
This pattern fires in 63 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 670 to 2677, with a median rating of 1512. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_2792 |
|---|---|
| Puzzles where it fires | 63 |
| Min ELO | 670 |
| Median ELO | 1512 |
| Max ELO | 2677 |
| Coverage | 0.63% 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 00lMW_M — ELO 670, themes: endgame, mate, mateIn1, side to move: Black
- Puzzle zZbXG_M — ELO 762, themes: advantage, discoveredAttack, kingsideAttack, side to move: Black
- Puzzle zzYwJ_M — ELO 914, themes: kingsideAttack, mate, mateIn1, side to move: Black
- Puzzle zwFaV_M — ELO 1217, themes: kingsideAttack, mate, mateIn1, side to move: Black
- Puzzle zzn4f_F — ELO 1363, themes: endgame, mate, mateIn2, side to move: White
- Puzzle EOZct_M — ELO 1512, themes: doubleBishopMate, mate, mateIn2, side to move: Black
- Puzzle kzZ3W_F — ELO 1659, themes: doubleBishopMate, kingsideAttack, long, side to move: White
- Puzzle TPNt9_M — ELO 1695, themes: discoveredAttack, discoveredCheck, doubleBishopMate, side to move: Black
- Puzzle w1cZh_F — ELO 2331, themes: advantage, long, master, side to move: Black
- Puzzle ztV1B_M — ELO 2405, themes: advantage, endgame, long, 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_2792?
Detects a king (either colour) cornered on the back rank in a mating-net position, typically on the a-file or queenside corner, with escape squares controlled by the opponent. 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 63 tagged puzzles (0.6% of the set), spanning Lichess ELO 670 to 2677 with a median of 1512.
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.