Sudoku
Fill every row, column and box without repeating a digit.
Controls
Fill the grid so every row, column and box contains each digit exactly once. Tap a cell, then tap a number to place it; use Clear or Backspace to remove a digit. Givens cannot be changed, and conflicting digits are highlighted. On a keyboard use the arrow keys and number keys. The puzzle is solved when every cell is filled with no conflicts.
Brain training · PuzGo