All sudoku puzzles 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 sudoku puzzles are listed in a graphical way and easy to find.
100.000 sudoku grids to solve. All the solutions. 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 puzzles. No ads. Edit function to add your custom sudoku puzzle. No permissions required (your privacy is guaranteed).
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