A square on the 3rd rank is attacked by at least one black piece and not defended by any white pieces.
SAE concept sae_4567 fires when a square on the 3rd rank is attacked by at least one black piece and not defended by any white pieces.. It appears in 180 of 9,950 Climbchess puzzles (1.8%), spanning ELO 613–2672 (median 1632).
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This page documents A square on the 3rd rank is attacked by at least…, 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 square on the 3rd rank is attacked by at least one black piece and not defended by any white pieces.
This pattern fires in 180 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 613 to 2672, with a median rating of 1632. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_4567 |
|---|---|
| Puzzles where it fires | 180 |
| Min ELO | 613 |
| Median ELO | 1632 |
| Max ELO | 2672 |
| Coverage | 1.81% 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 xbPL4_M — ELO 613, themes: anastasiaMate, endgame, mate, side to move: White
- Puzzle urcTE — ELO 861, themes: crushing, endgame, short, side to move: Black
- Puzzle zxYqT — ELO 1039, themes: crushing, kingsideAttack, middlegame, side to move: Black
- Puzzle zbZbn — ELO 1127, themes: crushing, endgame, exposedKing, side to move: White
- Puzzle zlyu4 — ELO 1372, themes: arabianMate, mate, mateIn2, side to move: White
- Puzzle wtgHC — ELO 1632, themes: arabianMate, discoveredCheck, doubleCheck, side to move: White
- Puzzle x0dPg — ELO 1702, themes: mate, mateIn2, middlegame, side to move: White
- Puzzle zpX41 — ELO 1977, themes: attackingF2F7, mate, mateIn2, side to move: Black
- Puzzle 00lvf_M — ELO 2122, themes: advantage, long, middlegame, side to move: White
- Puzzle Cz3ta_M — ELO 2402, themes: arabianMate, endgame, exposedKing, 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_4567?
A square on the 3rd rank is attacked by at least one black piece and not defended by any 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 180 tagged puzzles (1.8% of the set), spanning Lichess ELO 613 to 2672 with a median of 1632.
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.