- Choose Daily Circuit, Classic 5 × 5, Progressive 6 × 6, or Progressive 7 × 7.
- Selecting one light toggles it and its direct neighbors: up, down, left, and right.
- Diagonal lights are not affected.
- Clear every light to finish the puzzle.
- Your score is your move count plus two penalty moves for every hint.
Daily Circuit uses the same seeded puzzle for everyone on a given day. Every board is built by applying legal moves to an empty board, so a solution always exists. The game shows the solver’s optimal move count as par, and your daily completion streak is stored locally.
Lights Out was released as an electronic puzzle by Tiger Electronics in 1995. Its simple press-to-toggle rule turns the board into a small exercise in linear algebra and planning. Many later puzzle games borrowed the same neighborhood-switching idea.
The board, score, best result, and daily streak live only in this browser. No account or network request is required.
