General middlegame tension involving a contested pawn or piece on the side-to-move's half of the board.
SAE concept sae_19360 fires when general middlegame tension involving a contested pawn or piece on the side-to-move's half of the board.. It appears in 21 of 9,950 Climbchess puzzles (0.2%), spanning ELO 650–2574 (median 1767).
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This page documents General middlegame tension involving a contested…, 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:
General middlegame tension involving a contested pawn or piece on the side-to-move's half of the board.
This pattern fires in 21 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 650 to 2574, with a median rating of 1767. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_19360 |
|---|---|
| Puzzles where it fires | 21 |
| Min ELO | 650 |
| Median ELO | 1767 |
| Max ELO | 2574 |
| Coverage | 0.21% 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 zqC5Y — ELO 650, themes: hangingPiece, mate, mateIn1, side to move: Black
- Puzzle 01xjo — ELO 923, themes: advantage, fork, middlegame, side to move: White
- Puzzle zq1uH — ELO 1015, themes: clearance, kingsideAttack, mate, side to move: Black
- Puzzle zzrCr — ELO 1510, themes: crushing, discoveredAttack, discoveredCheck, side to move: Black
- Puzzle zystE — ELO 1700, themes: crushing, discoveredAttack, kingsideAttack, side to move: Black
- Puzzle 00XPO — ELO 1767, themes: crushing, middlegame, short, side to move: White
- Puzzle zz4bz — ELO 1917, themes: attraction, mate, mateIn2, side to move: Black
- Puzzle zz4bz_M — ELO 1917, themes: attraction, mate, mateIn2, side to move: Black
- Puzzle zSZCl_F — ELO 2522, themes: advantage, fork, hangingPiece, side to move: Black
- Puzzle yQjaB — ELO 2574, themes: advancedPawn, crushing, 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_19360?
General middlegame tension involving a contested pawn or piece on the side-to-move's half of the board. 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 21 tagged puzzles (0.2% of the set), spanning Lichess ELO 650 to 2574 with a median of 1767.
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.