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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.

161745 puzzles downloaded.

    9 4       8  
      8         3
          7 6 9  
  1              
                 
              3  
  9 3 2          
5         1      
  2       3 5    
Showing puzzle number: 74
Puzzletype: Symmetrical Sudoku
Startnumbers: 18
Difficulty: Very easy (0)
Solution methods: SiSo SC
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