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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.

157399 puzzles downloaded.

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