Lights out

How it works

1. A tap flips the cell and its orthogonal neighbors. Turn every light off.
2. Tap the buttons or reach them with Tab and activate with Enter/Space. New game resets the round.

Example & practical use

A tap flips the cell and its orthogonal neighbors. Turn every light off.

Limits and help

Runs on this device. No online multiplayer, prizes or money. Puzzles and memory games are not medical or ability assessments.

Your files are yours.

Image and text processing happens in your browser. Your files are not uploaded to our servers.

Troubleshooting

Try the small example on this page first. If it works, check your input format and size limit. Save any needed input before reloading. You do not need to share a file or password to report an issue.

Report an issue and track its status · Contact · Contact