A white rook under attack by black pieces and defended by a white piece, typically in a contested endgame with active back-rank or mid-board rook tension.
SAE concept sae_5315 fires when a white rook under attack by black pieces and defended by a white piece, typically in a contested endgame with active back-rank or mid-board rook tension.. It appears in 30 of 9,950 Climbchess puzzles (0.3%), spanning ELO 829–2290 (median 1817).
Free forever · no email · no signup · delete data anytime.
This page documents A white rook under attack by black pieces and…, 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 white rook under attack by black pieces and defended by a white piece, typically in a contested endgame with active back-rank or mid-board rook tension.
This pattern fires in 30 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 829 to 2290, with a median rating of 1817. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_5315 |
|---|---|
| Puzzles where it fires | 30 |
| Min ELO | 829 |
| Median ELO | 1817 |
| Max ELO | 2290 |
| Coverage | 0.30% 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 zzQbZ — ELO 829, themes: endgame, mate, mateIn1, side to move: Black
- Puzzle ye0yN — ELO 862, themes: crushing, endgame, exposedKing, side to move: Black
- Puzzle zznKi — ELO 1180, themes: advancedPawn, mate, mateIn1, side to move: White
- Puzzle zt8Gg — ELO 1526, themes: advantage, middlegame, short, side to move: Black
- Puzzle zzpd8_F — ELO 1677, themes: crushing, middlegame, pin, side to move: White
- Puzzle zwxp4 — ELO 1817, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle wXikb — ELO 1963, themes: backRankMate, clearance, endgame, side to move: Black
- Puzzle yvicD — ELO 1999, themes: backRankMate, clearance, endgame, side to move: White
- Puzzle 00Qog — ELO 2057, themes: crushing, middlegame, short, side to move: White
- Puzzle 021Fv — ELO 2290, themes: crushing, endgame, fork, 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_5315?
A white rook under attack by black pieces and defended by a white piece, typically in a contested endgame with active back-rank or mid-board rook tension. 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 30 tagged puzzles (0.3% of the set), spanning Lichess ELO 829 to 2290 with a median of 1817.
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.