A black knight retreating or relocating to a back-rank square under pressure.
SAE concept sae_11832 fires when a black knight retreating or relocating to a back-rank square under pressure.. It appears in 115 of 9,950 Climbchess puzzles (1.2%), spanning ELO 642–2641 (median 1585).
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This page documents A black knight retreating or relocating to a…, 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 black knight retreating or relocating to a back-rank square under pressure.
This pattern fires in 115 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 642 to 2641, with a median rating of 1585. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_11832 |
|---|---|
| Puzzles where it fires | 115 |
| Min ELO | 642 |
| Median ELO | 1585 |
| Max ELO | 2641 |
| Coverage | 1.16% 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 ytDY3 — ELO 642, themes: mate, mateIn1, oneMove, side to move: White
- Puzzle zyc2K_M — ELO 706, themes: mate, mateIn1, middlegame, side to move: Black
- Puzzle zzap4_F — ELO 846, themes: kingsideAttack, mate, mateIn2, side to move: Black
- Puzzle 01n9x_F — ELO 1046, themes: crushing, endgame, short, side to move: White
- Puzzle z6ZVe — ELO 1383, themes: advantage, attraction, long, side to move: Black
- Puzzle zjppA_F — ELO 1585, themes: advantage, long, middlegame, side to move: White
- Puzzle 00kCm_F — ELO 1829, themes: advantage, middlegame, veryLong, side to move: Black
- Puzzle zvxbY_F — ELO 1926, themes: advantage, attraction, discoveredAttack, side to move: Black
- Puzzle zTimH_F — ELO 2059, themes: endgame, long, mate, side to move: Black
- Puzzle znieJ — ELO 2277, themes: crushing, endgame, exposedKing, 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_11832?
A black knight retreating or relocating to a back-rank square under pressure. 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 115 tagged puzzles (1.2% of the set), spanning Lichess ELO 642 to 2641 with a median of 1585.
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.