Excalibur Einstein LCD Sudoku Wizard E124CS Sudoku is the hottest logic game in the world. Keep your mind sharp by playing Sudoku puzzles anywhere. Contains more than 800 puzzles. Ergonomic, lightweight design so you can take it anywhere. Saves game in memory so you can continue it at any time. Choose from easy, medium, or hard puzzles depending on your skill level. The hint key gives you a little help for those who need it.