Toggle puzzle
Light box
Every tap flips a tile and its four neighbours. Find the order that switches every light off.
How to play
Tap
A tap flips a tile and its four neighbours on or off.
Goal
Switch the whole board dark. Every light off.
0 lights on
0 moves
A puzzle like this is pure parity: each tile is its own switch, tapping twice undoes it, and the order you tap never matters. Because every board here is built by scrambling a blank grid, the taps that lit it are always enough to clear it.
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