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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.

5           7 2  
    8     1   6  
        2 8 9    
              7  
        4        
  1              
    3 9 5        
  8   1     6    
  9 6           2
Showing puzzle number: 29677
Puzzletype: Symmetrical Sudoku
Startnumbers: 21
Difficulty: Very easy (0)
Solution methods: SiSo SC
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