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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.

301078 puzzles downloaded.

    4     9      
                 
6   2     5   7  
        3       8
    9   6   2    
1       2        
  1   3     7   2
                 
      7     5    
Showing puzzle number: 58992
Puzzletype: Symmetrical Sudoku
Startnumbers: 19
Difficulty: Very easy (0)
Solution methods: SiSo SC
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