Lights Out

How to play Lights Out

Lights Out is the classic parity puzzle. Pressing a cell toggles it and its four neighbours, and the board is cleared when every light is off. Each board is made by pressing random cells on a dark grid, so it is always solvable, and that number of presses is shown as par.

A run is ten boards. The first five are five-by-five and the rest six-by-six, with the scramble depth rising each level. Beating par earns a bonus on top of the level score, and the clock runs across the whole set, so the best time is saved locally.

Objective

Turn every light off on ten increasingly scrambled boards, in as few presses and as little time as you can.

Features

• Boards generated by random presses, so every one is solvable
• Ten levels with rising scramble depth and a 6×6 grid from level six
• Par per board with a bonus for beating it
• Cursor and tap input on the same board
• Best clear time saved locally

Scores are saved in this browser only. There is no global ranking and nothing is uploaded.