Today
Sudoku
Goal
Fill every row, column, and 3×3 box with the digits 1 through 9.
How to play
- Pick a difficulty — easy, medium, or hard.
- Tap a cell, then tap a number to fill it. Tap the same number again to clear.
- Each row, column, and 3×3 box must contain every digit 1–9 exactly once.
- No live error checking — you'll know it's right when the grid is full and complete.
- Each difficulty is independent. Switching tiers preserves your progress on the others.