Complete, easy and intuitive to use Sudoku free game. All puzzle games are tested and guaranteed to have one and only one solution, they are real sudoku grids. The most difficult sudoku grids of the Internet are present, only 17 givens and always one solution. Games are saved and you can resume them later. Unfinished games are listed in a graphical way and easy to find. Optimized both for smartphones and tablets. All grids can be played offline. Each sudoku grid has an unique solution. 5 levels: very easy, easy, medium, hard, evil. 3 input methods: number first, cell first, popup. Graphical list of the sudoku puzzle games. Edit function to add your custom sudoku puzzle. Credits: openclipart.org ciaosudoku.com