Test your logic and problem-solving skills with a timeless classic. Select your difficulty and start solving!
Sudoku is a logic-based number placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid contain all of the digits from 1 to 9.
In this example, the bold line indicates the 3x3 box rule. No number can repeat inside this box.
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