Sudoku
Fill the grid — every row, column, and 3×3 box uses 1–9 once.
How to play
Tap a cell to select it, then tap a number to fill it in. Every row, column, and 3×3 box must contain each digit 1–9 exactly once. Use ✏️ Pencil mode to jot candidate numbers in small text. Erase clears the selected cell. You get 3 mistakes before the game ends.