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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.

184547 puzzles downloaded.

5 13   7 6 14     15       3      
                14 2   3     16  
    8                     14    
14         3 16     13   6 1      
7 16   4   10   11 13     15   2    
      1 7     15   11     6 10 4  
10     2 12 1   4 9 16   14   13    
            6         10 16      
      5 1         15            
    11   2   14 8 3   12 4 5     10
  8 13 10     4   16     11 14      
    4   10     16 6   14   2   7 13
      3 11   15     12 6         9
    7                     6    
  11     5   12 9                
      12       1     5 7 4   13 11
Showing puzzle number: 254
Puzzletype: Symmetrical Sudoku
Startnumbers: 92
Difficulty: Super easy (0)
Solution methods: SiSo
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