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If you want to know how to use Sudoku Dare, watch this YouTube video.

To enter a number, hover above a sudoku cell and type a number. A cell has 3 parts, the center part for the main number, the number which you're convinced it's the right one. And 2 parts, upper and lower, for numbers you think they still might go into a cell. Or numbers you want to try.

To begin a sudoku set a skill and click the New button. If your sudoku isn't right, click the Restart button to restart the same sudoku. Sudoku Dare can give you a number but you'll get a 30 seconds penalty, 30 seconds is added to the solving timer. When you're convinced your sudoku is right, click the Check button. If it isn't right, you'll get a list where your sudoku is wrong.

Can't solve it? The Show button shows the solution. Want to enter your own sudoku, click the Enter button. And begin solving it by clicking the Start button.

Sudoku Dare automatically saves the sudoku you're working on. But you may save it yourself to work on it at a later stage.