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Sudoku puzzles disjoint groups (Su Doku)

My database includes 67954 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. The cells with the same color must also contain the digits 1 through 9. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

303745 puzzles downloaded.

        7        
6     4          
4 7     2        
9   2 1       4  
                 
  5       3 1   2
        8     9 6
          9     5
        3        
Showing puzzle number: 15948
Puzzletype: Symmetrical Sudoku
Startnumbers: 20
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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