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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.

                 
          1 9 2  
      2     1   7
  5 1 7     8 3  
7     6   4     2
  6 2     8 4 7  
2   5     3      
  3 7 1          
                 
Showing puzzle number: 20870
Puzzletype: Symmetrical Sudoku
Startnumbers: 26
Difficulty: Very easy (0)
Solution methods: SiSo SC
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