Description:Shuffle Sudoku gives you a fun twist on the classic Japanese puzzle game! Tired of playing the game with numbers? Use the Letters option to challenge yourself even further. Normal and Expert modes make things more challenging for you, by changing how some of the buttons work. Classic Sudoku rules apply; fill in all the fields by placing digits 1 to 9 in the grid. Make sure that the digits do not repeat themselves in any row, 3x3 box or column. Test yourself to see how quick you can solve the puzzle. Enjoy!