Chess concept reference

Windmill

Repeated discovered checks win material move after move.

The idea

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.

Recognize it

  • 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.