Black queen on the back rank flanked by two friendly rooks, with no white piece attacking her square.
SAE concept sae_2369 fires when black queen on the back rank flanked by two friendly rooks, with no white piece attacking her square.. It appears in 161 of 9,950 Climbchess puzzles (1.6%), spanning ELO 631–2634 (median 1385).
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This page documents Black queen on the back rank flanked by two…, 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:
Black queen on the back rank flanked by two friendly rooks, with no white piece attacking her square.
This pattern fires in 161 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 631 to 2634, with a median rating of 1385. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_2369 |
|---|---|
| Puzzles where it fires | 161 |
| Min ELO | 631 |
| Median ELO | 1385 |
| Max ELO | 2634 |
| Coverage | 1.62% 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 zyZja — ELO 631, themes: kingsideAttack, mate, mateIn2, side to move: White
- Puzzle vaMud — ELO 817, themes: advantage, endgame, fork, side to move: White
- Puzzle zTdjL — ELO 939, themes: mate, mateIn1, oneMove, side to move: Black
- Puzzle 00fpk_F — ELO 971, themes: mate, mateIn1, middlegame, side to move: Black
- Puzzle zzltf — ELO 1204, themes: fork, mate, mateIn2, side to move: White
- Puzzle zzU3k — ELO 1385, themes: clearance, kingsideAttack, master, side to move: White
- Puzzle zzZcn — ELO 1580, themes: crushing, intermezzo, master, side to move: Black
- Puzzle zzwhe_M — ELO 1795, themes: advantage, opening, short, side to move: Black
- Puzzle zxlwY_M — ELO 1976, themes: crushing, kingsideAttack, long, side to move: Black
- Puzzle zrdxh — ELO 2191, themes: crushing, discoveredAttack, opening, 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_2369?
Black queen on the back rank flanked by two friendly rooks, with no white piece attacking her square. 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 161 tagged puzzles (1.6% of the set), spanning Lichess ELO 631 to 2634 with a median of 1385.
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.