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Lights Out puzzle

Switch off every light. Play solvable 4×4 and 5×5 puzzles with optional hints.

No installationDesktop · mobile
Moves / clicks 0

Preparing your game…

Use click/touch or arrow keys and Enter/Space. Against the computer, you play the first color.

Progress is saved in this browser and shared across languages. A new game replaces the previous save.

How to play

  1. Press a cell to toggle it and its orthogonal neighbors. Edge presses only affect cells inside the board. Turn everything off to finish.
  2. Use click/touch or arrow keys and Enter/Space. Against the computer, you play the first color.
  3. Progress is saved in this browser and shared across languages. A new game replaces the previous save.

Good to know

Pressing the same cell twice cancels out. Boards are generated by applying valid presses to an unlit board, so a solution exists. Hints provide one solution, not necessarily the fewest clicks.

Restart this board repeats the same puzzle. New game generates a different board.

Play without signing in or submitting a score.

PLAY & LEARN

Lights Out puzzle · Rules and strategy

Switch off every light. Play solvable 4×4 and 5×5 puzzles with optional hints.

Rules and goal

Press a cell to toggle it and its orthogonal neighbors. Edge presses only affect cells inside the board. Turn everything off to finish.

Playing tips

Pressing the same cell twice cancels out. Boards are generated by applying valid presses to an unlit board, so a solution exists. Hints provide one solution, not necessarily the fewest clicks.

Saved progress

Progress is saved in this browser and shared across languages. A new game replaces the previous save.

Worked example

A center press toggles five cells in a cross; a corner press toggles three.

Frequently asked questions

Can I continue in another language?

Progress is saved in this browser and shared across languages. A new game replaces the previous save.

Is this online multiplayer?

Play against a practice computer or on one device. There are no accounts, score submissions or online matchmaking.