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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.

368867 puzzles downloaded.

    9 8          
          3 6 4  
5               8
    4 7 6   3    
  7           8  
    2   8 1 9    
4               2
  5 1 3          
          4 7    
Showing puzzle number: 55587
Puzzletype: Symmetrical Sudoku
Startnumbers: 24
Difficulty: Very easy (0)
Solution methods: SiSo SC
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