Active king in a king-and-pawn endgame, often on the 3rd–5th rank with adjacent pawns, across a variety of endgame structures.
SAE concept sae_2769 fires when active king in a king-and-pawn endgame, often on the 3rd–5th rank with adjacent pawns, across a variety of endgame structures.. It appears in 865 of 9,950 Climbchess puzzles (8.7%), spanning ELO 605–2698 (median 1638).
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This page documents Active king in a king-and-pawn endgame, often on…, 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:
Active king in a king-and-pawn endgame, often on the 3rd–5th rank with adjacent pawns, across a variety of endgame structures.
This pattern fires in 865 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 605 to 2698, with a median rating of 1638. That distribution tells you whether this is a beginner cue or a master-level subtlety.
Pattern statistics
| Concept ID | sae_2769 |
|---|---|
| Puzzles where it fires | 865 |
| Min ELO | 605 |
| Median ELO | 1638 |
| Max ELO | 2698 |
| Coverage | 8.69% 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 yS8nE — ELO 605, themes: crushing, endgame, long, side to move: Black
- Puzzle zfyRp — ELO 835, themes: crushing, endgame, long, side to move: Black
- Puzzle 00cud — ELO 960, themes: crushing, endgame, fork, side to move: Black
- Puzzle 01EDR_M — ELO 1175, themes: endgame, side to move: White
- Puzzle zzKvv_F — ELO 1399, themes: crushing, endgame, master, side to move: White
- Puzzle zyDuF_M — ELO 1638, themes: advancedPawn, endgame, mate, side to move: White
- Puzzle zkE7f — ELO 1814, themes: crushing, endgame, pawnEndgame, side to move: White
- Puzzle zfMWD — ELO 2018, themes: crushing, defensiveMove, endgame, side to move: Black
- Puzzle z7RmR_M — ELO 2206, themes: advancedPawn, crushing, endgame, side to move: White
- Puzzle zFV2o — ELO 2454, themes: advancedPawn, crushing, 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_2769?
Active king in a king-and-pawn endgame, often on the 3rd–5th rank with adjacent pawns, across a variety of endgame structures. 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 865 tagged puzzles (8.7% of the set), spanning Lichess ELO 605 to 2698 with a median of 1638.
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.