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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.

231160 puzzles downloaded.

10   14 5             12 16 15   8  
11           7             6    
    6     8   16   4     11   10 2
    9           8   14          
8         3     4       1   2  
  16   15   14       12 5       4  
  10 12             2           14
    3       10 4       8        
        12       6 10       13    
12           13             10 6  
  13       15 3       8   9   7  
  3   6       9     16         5
          4   3           12    
16 9   11     2   10   3     1    
    4             5           3
  15   3 11 12             5 2   16
Showing puzzle number: 243
Puzzletype: Symmetrical Sudoku
Startnumbers: 78
Difficulty: Very easy (0)
Solution methods: SiSo SC
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