Detects tactical positions involving a material imbalance or pawn-chain tension in the centre or kingside, often preceding a forcing mating sequence.
SAE concept sae_4131 fires when detects tactical positions involving a material imbalance or pawn-chain tension in the centre or kingside, often preceding a forcing mating sequence.. It appears in 83 of 9,950 Climbchess puzzles (0.8%), spanning ELO 702–2642 (median 2011).
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This page documents Detects tactical positions involving a material…, 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 tactical positions involving a material imbalance or pawn-chain tension in the centre or kingside, often preceding a forcing mating sequence.
This pattern fires in 83 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 702 to 2642, with a median rating of 2011. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_4131 |
|---|---|
| Puzzles where it fires | 83 |
| Min ELO | 702 |
| Median ELO | 2011 |
| Max ELO | 2642 |
| Coverage | 0.83% 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 zx2zu — ELO 702, themes: blindSwineMate, endgame, mate, side to move: White
- Puzzle zw5aa_F — ELO 850, themes: endgame, mate, mateIn2, side to move: Black
- Puzzle zzVJf_F — ELO 1101, themes: crushing, endgame, master, side to move: White
- Puzzle zm1n0 — ELO 1723, themes: advantage, hangingPiece, middlegame, side to move: Black
- Puzzle 00MDy_F — ELO 1920, themes: crushing, endgame, long, side to move: Black
- Puzzle zzTv6 — ELO 2011, themes: advancedPawn, crushing, deflection, side to move: White
- Puzzle zPT0y_M — ELO 2070, themes: crushing, endgame, long, side to move: White
- Puzzle za3nZ_M — ELO 2274, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle zKJvp_F — ELO 2428, themes: crushing, endgame, long, side to move: White
- Puzzle zxjqC_M — ELO 2540, themes: crushing, defensiveMove, deflection, 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_4131?
Detects tactical positions involving a material imbalance or pawn-chain tension in the centre or kingside, often preceding a forcing mating sequence. 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 83 tagged puzzles (0.8% of the set), spanning Lichess ELO 702 to 2642 with a median of 2011.
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.