Detects a central pawn on the 4th rank (d4, e4, or g4) that is under multi-piece attack, typically arising in middlegame pawn-break or deflection positions.
SAE concept sae_3448 fires when detects a central pawn on the 4th rank (d4, e4, or g4) that is under multi-piece attack, typically arising in middlegame pawn-break or deflection positions.. It appears in 22 of 9,950 Climbchess puzzles (0.2%), spanning ELO 702–2642 (median 2195).
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This page documents Detects a central pawn on the 4th rank (d4, e4…, 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 central pawn on the 4th rank (d4, e4, or g4) that is under multi-piece attack, typically arising in middlegame pawn-break or deflection positions.
This pattern fires in 22 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 702 to 2642, with a median rating of 2195. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_3448 |
|---|---|
| Puzzles where it fires | 22 |
| Min ELO | 702 |
| Median ELO | 2195 |
| Max ELO | 2642 |
| Coverage | 0.22% 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_M — ELO 702, themes: blindSwineMate, endgame, mate, side to move: White
- Puzzle 024qN_F — ELO 1439, themes: advantage, middlegame, short, side to move: Black
- Puzzle zlnTw — ELO 1509, themes: advantage, middlegame, short, side to move: Black
- Puzzle zlnTw_M — ELO 1509, themes: advantage, middlegame, short, side to move: Black
- Puzzle zzTv6_F — ELO 2011, themes: advancedPawn, crushing, deflection, side to move: Black
- Puzzle ztmn8_F — ELO 2195, themes: advantage, deflection, endgame, side to move: White
- Puzzle znZys — ELO 2343, themes: crushing, deflection, endgame, side to move: Black
- Puzzle znZys_M — ELO 2343, themes: crushing, deflection, endgame, side to move: Black
- Puzzle zoKYM_F — ELO 2598, themes: bishopEndgame, crushing, endgame, side to move: White
- Puzzle zRXe1 — ELO 2642, themes: crushing, endgame, long, 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_3448?
Detects a central pawn on the 4th rank (d4, e4, or g4) that is under multi-piece attack, typically arising in middlegame pawn-break or deflection positions. 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 22 tagged puzzles (0.2% of the set), spanning Lichess ELO 702 to 2642 with a median of 2195.
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.