Observed arrival · 2026-09-09

Windmill Chess: Turn Every Game Into a Lesson

windmillchess.com Observed source

Editorial interest 84/100 Selection signal · not a rating of the site

A free, browser-based chess trainer that analyzes games, creates mistake drills, serves real-game puzzles, and plays human-like bots.

Landing page captured for the 2026-09-09 issue.

Field notes

Windmill connects several study modes into one workflow: imported games produce reports, annotated mistakes can become personal drills, and puzzles open on the same analysis board. The page says Stockfish 18 runs locally in WebAssembly, while cloud evaluations and tablebases are available for single positions and can be disabled. Its opening reference covers 3,800 named lines, and the bot selector spans ratings from 400 to 2800.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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