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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.

400550 puzzles downloaded.

5               4
  7 8   3        
2 3              
            7   2
  2   6   9   8  
6   5            
              7 6
        6   3 1  
7               8
Showing puzzle number: 29997
Puzzletype: Symmetrical Sudoku
Startnumbers: 22
Difficulty: Super easy (0)
Solution methods: SiSo
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