Sudoku is a logic-based, combinatorial number-placement puzzle game. The objective is to fill a 9x9 grid with digits 1to 9 so that each column, each row, and each of the nine 3x3 sub-grids contains each digit once. This App provides 70. 000 levels in 7 difficulties (very easy, easy, medium, hard, very hard, unfair, extreme).
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