Congratulate


4 5
9 6 3 4
2 9 5
6
5 4 1 9
2 9 5 7
4
7 3 6
1 7 4

VERY EASY    EASY    MODERATE    HARD    NIGHTMARE   
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How to play SUDOKU
The idea of Sudoku is to fill a 9x9 grid with numbers so that each row, each column, and each of the nine 3x3 sub-grids contains all of the numbers from 1 to 9.
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