A pawn tension square in the centre or endgame, contested by opposing pieces with the white pawn as the primary attacker.
SAE concept sae_23410 fires when a pawn tension square in the centre or endgame, contested by opposing pieces with the white pawn as the primary attacker.. It appears in 32 of 9,950 Climbchess puzzles (0.3%), spanning ELO 632–2451 (median 1860).
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This page documents A pawn tension square in the centre or endgame…, 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:
A pawn tension square in the centre or endgame, contested by opposing pieces with the white pawn as the primary attacker.
This pattern fires in 32 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 632 to 2451, with a median rating of 1860. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_23410 |
|---|---|
| Puzzles where it fires | 32 |
| Min ELO | 632 |
| Median ELO | 1860 |
| Max ELO | 2451 |
| Coverage | 0.32% 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 zujzx — ELO 632, themes: crushing, endgame, hangingPiece, side to move: Black
- Puzzle ys3o2_F — ELO 862, themes: arabianMate, endgame, kingsideAttack, side to move: White
- Puzzle zwyZj_F — ELO 1186, themes: attraction, crushing, endgame, side to move: Black
- Puzzle z0mjO_M — ELO 1280, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle zLjAZ_M — ELO 1339, themes: advancedPawn, attraction, crushing, side to move: Black
- Puzzle zzp43 — ELO 1860, themes: advantage, fork, middlegame, side to move: White
- Puzzle zyv2u_F — ELO 1969, themes: advancedPawn, crushing, endgame, side to move: Black
- Puzzle 00pWF_M — ELO 2040, themes: advancedPawn, crushing, endgame, side to move: White
- Puzzle zfRXf_M — ELO 2271, themes: crushing, endgame, exposedKing, side to move: Black
- Puzzle zzJ3V_M — ELO 2348, themes: crushing, endgame, pawnEndgame, side to move: Black
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_23410?
A pawn tension square in the centre or endgame, contested by opposing pieces with the white pawn as the primary attacker. 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 32 tagged puzzles (0.3% of the set), spanning Lichess ELO 632 to 2451 with a median of 1860.
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.