How to play
Click any cell to toggle it. The clicked cell flips state (on becomes off, off becomes on) as do its four orthogonal neighbours. Continue clicking to reach the all-off state. The minimum-click solution is computed and displayed after each win.
Game features
- Twenty-five hand-designed starting patterns
- Random-pattern generator producing only solvable configurations
- Minimum-click solution displayed after each win
- Click counter rewards efficient solving
- Three difficulty modes from sparse to dense initial patterns
- Daily challenge with shared seed
Editor review
Lights Out is unusual among puzzle games in that the solution mathematics are well-known and computable. Every starting position has a determined minimum-click solution (or is unsolvable, which the generator excludes). The player's task is to discover the click sequence through reasoning or trial-and-error.
The game has a known elegant solution strategy: the chase method (click below any light that is on, top row to bottom; then apply the appropriate top-row corrections based on which bottom-row lights remain). Players who discover this method on their own report it as a satisfying mathematical realisation. Players who look up the method find their solve times drop from minutes to seconds.
The minimum-click solution display is the games clearest pedagogical feature. After each win, you see how close to optimal your solve was — usually within a few clicks of the minimum, which feels like genuine progress. Recommended for mathematical-puzzle enthusiasts.