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Sudoku puzzles disjoint groups (Su Doku)

My database includes 656 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 4x4 box contains the digits 1 through 16. The cells with the same color must also contain the digits 1 through 16. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

255274 puzzles downloaded.

    14               12       8  
      8 16 6             14   4  
          8 14   7     9        
      13 12       8     11 5      
      10 14                 16 9 15
    2 11 13 16                    
14 16 6                 7       5
      9     12   15 10   16   14    
    13   8   2 6   11     9      
3       11                 13 15 4
                    2 6 16 5    
16 11 1                 14 2      
      5 15     7       4 10      
        6     12   15 9          
  13   1             11 8 3      
  8       5               9    
Showing puzzle number: 382
Puzzletype: Symmetrical Sudoku
Startnumbers: 74
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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