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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.

226056 puzzles downloaded.

      11 9     10   5     2      
  13           7                
        16   5     7   1   9    
        13   1 2   10     6   3 15
    13     4           3        
9               16 15         12  
12     14       8 1   7     15   5
    8   5   13 11 14 2 9   10   16  
  14   6   10 8 5 4 12   15   16    
2   4     16   1 7       12     13
  3         14 12               2
        2           5     4    
8 2   13     12   15 3   7        
    1   14   7     4   10        
                2           8  
      10     2   11     5 16      
Showing puzzle number: 76
Puzzletype: Symmetrical Sudoku
Startnumbers: 84
Difficulty: Very easy (0)
Solution methods: SiSo SC
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