Lights Out

Turn off all the lights by strategic clicking

Game

00:00 Moves: %d

How to Play

  • ๐Ÿ’ก Turn off all lights on the grid
  • ๐Ÿ‘† Click a light to toggle it and its adjacent lights
  • ๐Ÿ”„ Clicking toggles the clicked light and lights above, below, left, and right
  • ๐Ÿงฉ Use strategy to think about the order of clicks needed
  • โš™๏ธ You can select grid size and difficulty
๐Ÿ”ฆ History of Lights Out

Lights Out is an electronic puzzle game released by Tiger Electronics in 1995.

Mathematically, it's closely related to concepts in linear algebra and is also used in educational settings.

๐Ÿง  Strategy Tips
Basic Strategy
  • Think from corner lights
  • Edge lights have less effect range
  • Adjust center last
  • Don't press the same light twice
Advanced Techniques
  • Memorize patterns
  • Think several moves ahead
  • Think backwards
  • Use symmetry
๐ŸŽฎ Detailed Rules
1. Game Goal

The goal is to turn off all lights on the grid. Initially, some lights are on.

2. How to Play

Click (tap) a light to toggle the state of that light and the lights adjacent to it (up, down, left, right).

3. Grid Size
3ร—3 Beginner friendly - 9 lights
4ร—4 Intermediate level - 16 lights
5ร—5 Advanced level - 25 lights
4. Difficulty Settings

Difficulty changes the initial lighting patterns. Easy mode is designed to be enjoyable even for young children.

๐Ÿ’ก Did You Know?

Lights Out puzzles are mathematically determined to be solvable or not. This game only presents puzzles that are guaranteed to be solvable!

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