Fill up the grids in the Sudoku boxes so that each grid contains all of the numbers 1 through 9, and each horizontal and vertical row contains the numbers 1 through 9 without repeating any numbers. If you get stuck, you can get a hint by selecting a square and clicking "Hint." You can get up to three hints per level. Although this version of Sudoku includes a timer, there's no time limit. The Sudoku timer is just to help you challenge yourself. You can use either the mouse or the arrow keys to select Sudoku squares.
Controls: Mouse or arrow and number keys to fill the squares with numbers.