This feature detects a queen attacking a square on the 6th, 7th, or 8th rank, with no black defenders.

By Climbchess Research · 2026-05-08 · 3 min read · Updated May 8, 2026

SAE concept sae_25570 fires when this feature detects a queen attacking a square on the 6th, 7th, or 8th rank, with no black defenders.. It appears in 1 of 9,950 Climbchess puzzles (0.0%), spanning ELO 899–899 (median 899).

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This page documents This feature detects a queen attacking a square…, 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:

This feature detects a queen attacking a square on the 6th, 7th, or 8th rank, with no black defenders.

This pattern fires in 1 of our 9,950 tagged puzzles. The puzzles where it appears span ELO 899 to 899, with a median rating of 899. That distribution tells you whether this is a beginner cue or a master-level subtlety.

Pattern statistics

Related concepts

The five concepts most often co-firing alongside this one (Jaccard similarity over the puzzle co-occurrence graph) are:

• A white long-range piece — queen, rook, or bishop — exerts uncontested… — similarity 0.009
• White has a piece exerting uncontested control over advanced territory, often… — similarity 0.003
• Detects king-and-pawn endgames with kings in opposition or near-opposition… — similarity 0.003
• A white knight on rank 3, uncontested by black, in an active tactical or… — similarity 0.002
• A black bishop that is active or under pressure in a tactical position, often… — similarity 0.000

Example puzzles

Below are 1 puzzles spanning the rating distribution. Each links to its own page with full move list and related concepts.

• Puzzle zu0kS_M — ELO 899, themes: advantage, endgame, master, 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).