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Sudoku puzzles irregular and disjoint groups (Su Doku)

My database includes 131 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every box contains the digits 1 through 6. 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.

108218 puzzles downloaded.

    4            
  7 9   2        
    5         3 9
          3      
                 
      8          
7 2         4    
        1   8 5  
            2    
Showing puzzle number: 83
Puzzletype: Symmetrical Sudoku
Startnumbers: 16
Difficulty: Very easy (0)
Solution methods: SiSo SC
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