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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.

124715 puzzles downloaded.

  1         9    
      9   2      
        1     8  
  3             4
5   9       8   3
7             6  
  2     8        
      7   6      
    6         5  
Showing puzzle number: 75
Puzzletype: Symmetrical Sudoku
Startnumbers: 20
Difficulty: Medium (0)
Solution methods: SiSo SC SB DS
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