Endgame positions where a rook (either colour) operates on an open file or rank with tactical threats against the opposing king.
SAE concept sae_11983 fires when endgame positions where a rook (either colour) operates on an open file or rank with tactical threats against the opposing king.. It appears in 9 of 9,950 Climbchess puzzles (0.1%), spanning ELO 805–1923 (median 1264).
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This page documents Endgame positions where a rook (either colour)…, 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:
Endgame positions where a rook (either colour) operates on an open file or rank with tactical threats against the opposing king.
This pattern fires in 9 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 805 to 1923, with a median rating of 1264. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_11983 |
|---|---|
| Puzzles where it fires | 9 |
| Min ELO | 805 |
| Median ELO | 1264 |
| Max ELO | 1923 |
| Coverage | 0.09% 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 9 puzzles spanning the rating distribution. Each links to its own page with full move list and related concepts.
- Puzzle jRFfE — ELO 805, themes: crushing, endgame, master, side to move: Black
- Puzzle jRFfE_F — ELO 805, themes: crushing, endgame, master, side to move: White
- Puzzle jRFfE_M — ELO 805, themes: crushing, endgame, master, side to move: Black
- Puzzle wAVhW — ELO 1264, themes: arabianMate, endgame, kingsideAttack, side to move: White
- Puzzle wAVhW_F — ELO 1264, themes: arabianMate, endgame, kingsideAttack, side to move: Black
- Puzzle wAVhW_M — ELO 1264, themes: arabianMate, endgame, kingsideAttack, side to move: White
- Puzzle 01h1x — ELO 1923, themes: advantage, deflection, endgame, side to move: Black
- Puzzle 01h1x_F — ELO 1923, themes: advantage, deflection, endgame, side to move: White
- Puzzle 01h1x_M — ELO 1923, themes: advantage, deflection, endgame, 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_11983?
Endgame positions where a rook (either colour) operates on an open file or rank with tactical threats against the opposing king. 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 9 tagged puzzles (0.1% of the set), spanning Lichess ELO 805 to 1923 with a median of 1264.
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.