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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.

398041 puzzles downloaded.

    8       3 6  
          6   5  
      1 8   2   4
6   2            
7               8
            4   7
8   9   5 7      
  2   4          
  3 6       7    
Showing puzzle number: 17688
Puzzletype: Symmetrical Sudoku
Startnumbers: 24
Difficulty: Super easy (0)
Solution methods: SiSo
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