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Sudoku puzzles (Su Doku)

My database includes 2967 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row and every column contains the digits 1 through 16. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

371651 puzzles downloaded.

    12 13   1 15 2   11   8 6 16 7  
        16 12 5   3       4 2 1  
12   16   8                 9   13
16       5           15 10 7     1
1   2 8 3 11 9       16   10 13 12 5
        11   3   7 4 8 2 16 15 10 9
    1     16       8 13 5 11 10 14  
  6         1 9 2     15 8   4 11
6 5   12 14     3 11 15         13  
  14 10 2 15 8 16       3     11    
9 3 11 10 7 13 4 16   6   12        
2 7 8 3   5       13 9 16 15 1   14
11     15 12 9           1       8
10   13                 14   5   7
  13 4 11       12   14 2 6        
  10 5 16 6   14   4 12 11   1 7    
Showing puzzle number: 47
Puzzletype: Symmetrical Sudoku
Startnumbers: 130
Difficulty: Harder (0)
Solution methods: SiSo SC DC XW
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