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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.

278367 puzzles downloaded.

          10               15   11
  10       8     9   1 15     16  
6   13     12       2 14   1     7
              9           6   8
    5         7     3 10   1    
    10           8 4   5     13  
  15           10   7 11         12
        3 11             5 8    
    11 5             9 4        
2         16 6   1           9  
  9     11   7 15           14    
    16   9 14     2         12    
4   14           7              
13     10   2 14       4     3   9
  3     7 1   11     16       4  
15   7               12          
Showing puzzle number: 150
Puzzletype: Symmetrical Sudoku
Startnumbers: 76
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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