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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.

186408 puzzles downloaded.

10   14           1   3   5      
8 1   12       13         14   10  
  16     15     2   5     13     12
6         8       11   13        
14 4         5       1 3        
        1   12       13     2    
    13   9         2            
11     6 16   15           1      
      11           3   1 4     10
            3         16   14    
    16     1       6   10        
        8 10       12         7 11
        3   7       4         6
12     4     16   13     2     1  
  13   16         8       11   4 15
      8   15   1           16   5
Showing puzzle number: 262
Puzzletype: Symmetrical Sudoku
Startnumbers: 76
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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