Puzzles2 min read

How to play Lights Out

Every press flips a light and the lights next to it. Turn all the lights off.

Goal

Turn every light off, using as few presses as you can.

Pressing a light switches it, and the lights directly above, below, left and right of it, from on to off or off to on.
The boards grow from 3×3 on Easy to 6×6 on Expert.
Each puzzle shows a par, the fewest presses that solve it, and how many presses you may use. Solve it within that number to score.
If you give up, the explanation marks the squares to press.

On a 3×3 board with only the middle row lit, pressing the centre light turns the whole row off.

The order of presses doesn't matter, and pressing a light twice cancels out. So each light is pressed once or not at all.
Clear the board row by row: for each lit light, press the one directly below it.
On Easy and Medium, a hint shows one light to press.

Every correct answer is worth 100 points, scaled by difficulty (Easy ×0.8, Medium ×1, Hard ×1.3, Expert ×1.6).
Answering within 3 seconds adds a 25-point speed bonus.
Each answer in a row adds a 15-point streak bonus, up to 10 in a row.
Using a hint halves the points for that answer and skips the bonuses. Hints are only available on Easy and Medium.
Your score, streak and achievements are saved to your account when the game ends.

Classic

A fixed number of rounds, then a results screen.

Endless

Keep playing until you press Quit.

Time Attack

Fit in as many rounds as you can before the clock runs out.

Survival

Play until you run out of lives or make the game-ending mistake.