Cross-line switches

How it works

1. A tap flips the entire row and column, counting their intersection once. 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 entire row and column, counting their intersection once. 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.

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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.

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