The daily logic puzzle

What the seed decides

The day's seed draws the eight-by-eight grid and its eight regions. A solver checks every grid before it ships: it must have exactly one answer, so you never need to guess.

How it ranks

By solve time. Undo is free, so a wrong idea costs you nothing but the seconds it took. If two times tie, whoever finished first ranks higher.

Want more?

Endless mode serves grid after grid, from six-by-six up to nine-by-nine. It is unranked and never touches the daily board.

We never post a day's grid or answer.