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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.

107701 puzzles downloaded.

5                
2   7   5   3    
                 
    2       6    
      2   1      
    6       1    
                 
    4   8   9   1
                8
Showing puzzle number: 58
Puzzletype: Symmetrical Sudoku
Startnumbers: 16
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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