White pawn on g2/h3 attacked by one black piece and defended by two white pieces.
SAE concept sae_1402 fires when white pawn on g2/h3 attacked by one black piece and defended by two white pieces.. It appears in 24 of 9,950 Climbchess puzzles (0.2%), spanning ELO 736–2648 (median 1673).
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This page documents White pawn on g2/h3 attacked by one black piece…, 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 pawn on g2/h3 attacked by one black piece and defended by two white pieces.
This pattern fires in 24 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 736 to 2648, with a median rating of 1673. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_1402 |
|---|---|
| Puzzles where it fires | 24 |
| Min ELO | 736 |
| Median ELO | 1673 |
| Max ELO | 2648 |
| Coverage | 0.24% 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 zNIMH_M — ELO 736, themes: endgame, mate, mateIn1, side to move: Black
- Puzzle yfK6U_F — ELO 893, themes: backRankMate, endgame, long, side to move: Black
- Puzzle zyWdK_M — ELO 956, themes: backRankMate, endgame, mate, side to move: White
- Puzzle 00LUV_F — ELO 1483, themes: crushing, endgame, long, side to move: White
- Puzzle zFuYm — ELO 1556, themes: crushing, fork, long, side to move: Black
- Puzzle zy5gp_M — ELO 1673, themes: advantage, attraction, capturingDefender, side to move: Black
- Puzzle 00NKk_M — ELO 1894, themes: advantage, endgame, quietMove, side to move: Black
- Puzzle 01d0S_F — ELO 2021, themes: crushing, endgame, long, side to move: Black
- Puzzle ztqvt_M — ELO 2200, themes: attraction, deflection, mate, side to move: Black
- Puzzle AaI3E_F — ELO 2269, themes: anastasiaMate, attraction, deflection, 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_1402?
White pawn on g2/h3 attacked by one black piece and defended by two white pieces. 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 24 tagged puzzles (0.2% of the set), spanning Lichess ELO 736 to 2648 with a median of 1673.
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.