How to play
Every row, column and 3×3 box must contain the digits 1 to 9 once. Pencil marks and undo are there to help. Time and wrong entries decide the score; a grid you give up on still counts for the part you filled.
Scores run from 0 to 1000; an average result is about 600. Everyone gets the same round each day (it changes at midnight UTC). All games