Sudoku Classic. Help your brain stay healthy with Sudoku! In this fun logic puzzle your task is to fill the 9×9 grid with numbers. Each column, row and 3×3 block can contain the numbers 1 to 9 only once. Use markings to solve difficult grids or the magic wand in case you’re stuck. Select between a daily challenge and various difficulties and start your mental exercise now! This game can be played on all devices.