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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.

402754 puzzles downloaded.

  7     6   2   8
        7   5    
    9     1      
    1   4        
  6 5 8   3 1 4  
        1   7    
      7     3    
    7   3        
8   3   5     7  
Showing puzzle number: 30172
Puzzletype: Symmetrical Sudoku
Startnumbers: 26
Difficulty: Super easy (0)
Solution methods: SiSo
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