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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.

175829 puzzles downloaded.

  14 8             15   4     3  
2       16 3   1     11 7 10      
    12         8                
    1   12 15 11         14   2    
7 8     1     16 9     15        
  10 6       8   7       1      
        7         1 2   13   8  
      12         4   16     7    
    13     11   14         15      
  15   10   1 7         5        
      5       6   10       11 7  
        9     10 16     8     13 1
    15   3         6 7 2   10    
                11         14    
      7 8 4     10   13 9       2
  4     10   12             9 5  
Showing puzzle number: 376
Puzzletype: Symmetrical Sudoku
Startnumbers: 80
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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