White kingside rook undeveloped on h1 with the king still uncastled on e1 in an opening or early middlegame.
SAE concept sae_5201 fires when white kingside rook undeveloped on h1 with the king still uncastled on e1 in an opening or early middlegame.. It appears in 58 of 9,950 Climbchess puzzles (0.6%), spanning ELO 610–2544 (median 1266).
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This page documents White kingside rook undeveloped on h1 with the…, 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:
White kingside rook undeveloped on h1 with the king still uncastled on e1 in an opening or early middlegame.
This pattern fires in 58 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 610 to 2544, with a median rating of 1266. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_5201 |
|---|---|
| Puzzles where it fires | 58 |
| Min ELO | 610 |
| Median ELO | 1266 |
| Max ELO | 2544 |
| Coverage | 0.58% 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 zXEls — ELO 610, themes: mate, mateIn1, oneMove, side to move: White
- Puzzle zzrpZ_F — ELO 907, themes: mate, mateIn1, oneMove, side to move: White
- Puzzle 00rva_F — ELO 1008, themes: crushing, opening, short, side to move: White
- Puzzle zuGs4_F — ELO 1138, themes: mate, mateIn1, oneMove, side to move: White
- Puzzle 00s16_F — ELO 1168, themes: crushing, fork, opening, side to move: White
- Puzzle zDRcw_F — ELO 1266, themes: advantage, fork, interference, side to move: White
- Puzzle 00isY_F — ELO 1505, themes: crushing, fork, master, side to move: White
- Puzzle zkuNZ_F — ELO 1740, themes: advancedPawn, advantage, discoveredAttack, side to move: White
- Puzzle zzqAy_F — ELO 1858, themes: advancedPawn, advantage, opening, side to move: Black
- Puzzle y1oPM — ELO 2286, themes: advantage, long, 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_5201?
White kingside rook undeveloped on h1 with the king still uncastled on e1 in an opening or early middlegame. 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 58 tagged puzzles (0.6% of the set), spanning Lichess ELO 610 to 2544 with a median of 1266.
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.