A SMALL PUZZLE FOR A QUIET MIND

Afterglow●

One touch changes the neighborhood.
Can you turn every light off?

CHALLENGE 015 × 5

0moves

5lights on

0solved

Start with a single cross. Tap its center.

How to play

Press a tile to flip that light and the lights directly above, below, left and right. Edges do not wrap. Switch all 25 lights off to solve the puzzle.

Use arrow keys to move focus, then Space or Enter to press. Undo reverses your last move. Hint marks one useful tile. Retry restores this puzzle. Each new challenge adds more starting presses, up to 15. Every puzzle is solvable.

Your current puzzle and solved count stay in this browser. No timer: take your time.

Adapted from Lights Out by Sepand Haghighi · MIT license