Safe, uncontested knight with no immediate enemy attack.
SAE concept sae_12353 fires when safe, uncontested knight with no immediate enemy attack.. It appears in 17 of 9,950 Climbchess puzzles (0.2%), spanning ELO 1195–2224 (median 1993).
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This page documents Safe, uncontested knight with no immediate enemy…, 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:
Safe, uncontested knight with no immediate enemy attack.
This pattern fires in 17 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 1195 to 2224, with a median rating of 1993. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_12353 |
|---|---|
| Puzzles where it fires | 17 |
| Min ELO | 1195 |
| Median ELO | 1993 |
| Max ELO | 2224 |
| Coverage | 0.17% 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 zy3ZS — ELO 1195, themes: advantage, endgame, pin, side to move: White
- Puzzle zy3ZS_F — ELO 1195, themes: advantage, endgame, pin, side to move: Black
- Puzzle 00au3 — ELO 1249, themes: crushing, endgame, master, side to move: Black
- Puzzle zW1Bn — ELO 1373, themes: advantage, long, master, side to move: White
- Puzzle zW1Bn_F — ELO 1373, themes: advantage, long, master, side to move: Black
- Puzzle 024qY — ELO 1993, themes: advantage, middlegame, veryLong, side to move: Black
- Puzzle 024qY_M — ELO 1993, themes: advantage, middlegame, veryLong, side to move: Black
- Puzzle 01l8G — ELO 2154, themes: advantage, defensiveMove, endgame, side to move: White
- Puzzle 01l8G_M — ELO 2154, themes: advantage, defensiveMove, endgame, side to move: White
- Puzzle 020fP_F — ELO 2224, themes: advantage, middlegame, sacrifice, 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_12353?
Safe, uncontested knight with no immediate enemy attack. 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 17 tagged puzzles (0.2% of the set), spanning Lichess ELO 1195 to 2224 with a median of 1993.
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.