888

888: flip every tile dark.

888 is a small, stubborn puzzle. Tap a tile and it flips — along with the four around it. Keep going until the whole board is dark.That is the entire rule, and it is enough. Turning one tile off turns its neighbours on, so brute force gets you nowhere and the board has to be read as a whole.Every board is built by scrambling a cleared one, which means a solution is guaranteed and always fits inside the moves you are…