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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.

356074 puzzles downloaded.

6   1            
      7   6 4    
  5   9 3   1    
                 
  4 2       9 3  
                 
    6   8 5   2  
    9 1   7      
            5   1
Showing puzzle number: 35177
Puzzletype: Symmetrical Sudoku
Startnumbers: 22
Difficulty: Very easy (0)
Solution methods: SiSo SC
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