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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.

255182 puzzles downloaded.

  8 1     2     12   6     13    
            4 11       7 8     9
                      9     10  
        16 14     5   10 4   2 11  
                  5     1 10    
15             14 4 1 11          
    5 2   16 1   7     12 14 15 9  
  13       5       8   14   12    
    9   10   8       2       5  
  15 13 16 3     5   4 12   9 6    
          13 16 1 3             8
    8 7     2                  
  1 10   7 4   3     16 2        
  2     12                      
13     3 15       9 6            
    6     10   13     3     1 14  
Showing puzzle number: 465
Puzzletype: Symmetrical Sudoku
Startnumbers: 84
Difficulty: Super easy (0)
Solution methods: SiSo
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