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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.

233150 puzzles downloaded.

14   12                     8   2
3   13               4   16      
          5     8              
8         2   10             4  
16 7 2   13 11       9   15        
      15   7 1     14         5  
  1 9 12 16   3         6 10   8  
11 10     2 15     5     1 3 7    
    4 13 1     5     6 7     11 12
  6   8 11         13   5 2 4 10  
  16         4     8 1   9      
        6   2       11 9   1 3 13
  12             2   10         9
              12     7          
      16   14               6   7
10   14                     3   8
Showing puzzle number: 151
Puzzletype: Symmetrical Sudoku
Startnumbers: 84
Difficulty: Super easy (0)
Solution methods: SiSo
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