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Sudoku is a puzzle game that requires a lot of focus. There are three difficulty levels: Easy, Medium and Hard. The object of the game is to fill the square with numbers 1-9 but, each row, column and 3x3 grids (called a region) must only contain ONE of each number. To put a number into a square, you can either type it in on your keyboard or use the number wheel in the game. If you decide a number you have put in is incorrect, you can use the Erase button to take it out or, just simply put the correct number in its space.
The main tip is to stay focused and not to let your eyes get tired. Think logically and you will do fine. Good Luck!
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