Sudoku
Fill the 9×9 grid so every row, column and 3×3 box holds the digits 1 to 9 once. Easy, medium and hard puzzles, each with exactly one solution and no guessing, plus pencil notes, undo and a timer. Race the clock, climb the fastest-time leaderboard, and take on the daily puzzle.
- Tap a square, then a number — or type with the keyboard
- Pencil notes, undo and an optional check-as-you-go
- Ranked by your fastest time on each difficulty