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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.

245621 puzzles downloaded.

            2   7 3         1  
          14         15 9        
  16 4   10 3   15   1            
  9   10 12               16 2    
    9       14   15   11 1       5
  4   11     6       3 14 8      
    7 16       1     13       14  
    3 14 9       4           2  
  12           4       7 13 15    
  2       9     12       14 1    
      4 2 8       11     9   3  
8       13 1   12   14       4    
    6 15               8 5   7  
            10   1   14 13   8 9  
        15 2         10          
  11         8 7   5            
Showing puzzle number: 358
Puzzletype: Symmetrical Sudoku
Startnumbers: 80
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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