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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.

346297 puzzles downloaded.

    3            
              7 1
8     4 7 2      
  7   5     4    
4       3       2
    1     4   9  
      9 4 6     5
5 9              
            3    
Showing puzzle number: 50332
Puzzletype: Symmetrical Sudoku
Startnumbers: 23
Difficulty: Very easy (0)
Solution methods: SiSo SC
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