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Lights Out

Turn off every light. A press toggles a tile and its orthogonal neighbours.

  • Puzzle
  • Solo
  • Tap or keyboard
How to play
  1. The board is a 5×5 grid of lights. Your goal is to switch every light off.
  2. Pressing a tile toggles that tile and its four orthogonal neighbours (up, down, left, right).
  3. Pressing a tile twice cancels out, so each tile only ever needs to be pressed once.
  4. The puzzle is solved the moment the last light goes dark. Fewer moves is better.

Controls

  • Tap or click a tile to press it.
  • Arrow keys move between tiles; Enter or Space presses the focused tile.
  • Ctrl/⌘+Z undoes the last press; Ctrl/⌘+N starts a new puzzle.
  • Use the Undo, Restart, Hint and New buttons in the toolbar.

Tips

  • Order does not matter: only which tiles get pressed an odd number of times.
  • Try "light chasing": clear rows top to bottom by pressing the tile directly below each lit light.
  • Hints mark a tile from the optimal solution, but a hinted solve is not counted as perfect.