A king is placed on a low rank (1st or 2nd) in an endgame, relatively safe from immediate attack, as both sides manoeuvre for a decisive pawn promotion or zugzwang.
SAE concept sae_3007 fires when a king is placed on a low rank (1st or 2nd) in an endgame, relatively safe from immediate attack, as both sides manoeuvre for a decisive pawn promotion or zugzwang.. It appears in 119 of 9,950 Climbchess puzzles (1.2%), spanning ELO 734–2680 (median 1259).
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This page documents A king is placed on a low rank (1st or 2nd) in…, 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 king is placed on a low rank (1st or 2nd) in an endgame, relatively safe from immediate attack, as both sides manoeuvre for a decisive pawn promotion or zugzwang.
This pattern fires in 119 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 734 to 2680, with a median rating of 1259. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_3007 |
|---|---|
| Puzzles where it fires | 119 |
| Min ELO | 734 |
| Median ELO | 1259 |
| Max ELO | 2680 |
| Coverage | 1.20% 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 zyx20 — ELO 734, themes: crushing, endgame, fork, side to move: Black
- Puzzle 01HXY_M — ELO 884, themes: crushing, endgame, master, side to move: White
- Puzzle ztS51_M — ELO 963, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle zGPmz_M — ELO 1079, themes: crushing, endgame, short, side to move: Black
- Puzzle zu4Fq_M — ELO 1143, themes: crushing, defensiveMove, endgame, side to move: White
- Puzzle zqL2J_M — ELO 1259, themes: advantage, endgame, short, side to move: White
- Puzzle zsAsR_F — ELO 1406, themes: advancedPawn, crushing, endgame, side to move: White
- Puzzle zwd4v_F — ELO 1758, themes: endgame, epauletteMate, master, side to move: Black
- Puzzle 01oWi_F — ELO 2106, themes: bishopEndgame, crushing, endgame, side to move: White
- Puzzle wSpLi_F — ELO 2311, themes: endgame, hookMate, mate, 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_3007?
A king is placed on a low rank (1st or 2nd) in an endgame, relatively safe from immediate attack, as both sides manoeuvre for a decisive pawn promotion or zugzwang. 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 119 tagged puzzles (1.2% of the set), spanning Lichess ELO 734 to 2680 with a median of 1259.
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.