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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.

255935 puzzles downloaded.

  1 14   13             5        
12 16 7       5   10 11   6   2    
9       10     6   2     16     15
  13 4       14       1       9  
4     15 1                      
    1     14   5       3     10  
    10 13     7       14       11  
        6   16 4 12     1   8   3
10   6   3     11 8 7   14        
  4       6       13     7 10    
  11     12       15   9     6    
                      11 15     14
  3       13       5       11 15  
16     7     6   11     13       1
    13   2   15 1   14       9 6 12
        16             15   7 13  
Showing puzzle number: 314
Puzzletype: Symmetrical Sudoku
Startnumbers: 86
Difficulty: Super easy (0)
Solution methods: SiSo
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