Sudoku
Every digit once per row, column and box.
LogicClassic and Blitz5 levels
The rule
1
Fill the 9×9 grid with the digits 1 to 9.
2
Each digit once per row, per column and per box.
Here on a 4×4 grid: every row, column and box holds 1, 2, 3 and 4.
Filou’s tip
Pick a digit that is already all over the grid, then check each box: often only one cell can still take it.
Two modes
Classic · one grid, no time limit. Your record is your time.
Blitz · as many points as you can before the bell, grid after grid.
Leaderboards
Every level and mode has its own leaderboard, among friends and worldwide (if you join). With every record, your new rank shows up.
