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Sudoku is a logic-based, combinatorial 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.
Sudokuso provides the best way to help user to play sudoku. Soduku player could just note with available numbers in block, or just click the 'hint button' to get the answer.
