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Sudoku puzzles disjoint groups (Su Doku)

My database includes 67954 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. 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.

361080 puzzles downloaded.

      1     6    
9         5   2  
  4     8        
  5 3            
8               1
            8 7  
        7     3  
  9   6         8
    8     9      
Showing puzzle number: 49575
Puzzletype: Symmetrical Sudoku
Startnumbers: 20
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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