As the puzzles are computer generated using randomization techniques, it is possible that a puzzle has more than one solution. The Validate action correctly validates every solution. When you attempt a puzzle, the intermediate state of your work is automatically saved just the way it is done on paper. So take your own time in solving a puzzle. -------------------------------------------- Special Note: This product is not for those who want to learn how to solve a Sudoku puzzle. If you have ever solved Sudoku puzzles on paper, this is the game for you on your iPad. Just the way a paper puzzle does not help in solving itself, this game does not provide any hints. To make it truly difficult, even a rough pad is not provided. So if you are a genius in solving Sudoku puzzles, go ahead and you will enjoy this as much as your paper puzzles with the added convenience of electronic media. --------------------------------------------
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