Plain-English Definition
A windmill is a repeated discovery, usually with check, where one piece keeps moving away and back while the line piece controls the king.
Why It Matters
Windmills teach coordination between line pieces and tempo.
Common Signs in Games
- A discovered check can repeat.
- The moving piece has targets to collect.
- The king cannot escape the line.
Common Mistakes
- Stopping the sequence too early.
- Missing the safe return square.
- Starting a windmill when the king can run.