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How to play. About 4 minutes a puzzle.

A light puzzle a day. Turn mirrors and splitters until the beam lights every target on the board, in as few turns as you can.

  1. Tap a mirror, or move to it with the arrow keys and press Enter, to turn it a quarter.
  2. A splitter sends light straight on and off to one side.
  3. Light every target to solve the board. Walls stop the beam.
  4. Puzzles get harder through the week: Monday is gentle, Sunday is not.
  5. Hints say how many mirrors are wrong, then mark one, then show the whole path. A board solved with hints says so.

More to play. 6 daily games.

Every game
The Crossword The full-size daily crossword, a fresh grid every day. The Mini A five-by-five crossword, solved over a coffee. Headword Find the five-letter word in six guesses. Common Ground Sort sixteen words into four hidden groups. Hive Make words from seven letters. Every word uses the centre.