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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.

404194 puzzles downloaded.

    3 1 8 11   14   13 9 10   15 5 2
            12   5 14 15   2   9  
2 14         15 6 9 11 13 12   1 3 16
  2     14 6 13 1     8 5 9 10    
7   10     2   11         16 14 4 5
        9   1 16 7 15           11
  3   9 6 10     16   5     8 15  
13 1 11     9     10 8 2 3   12    
    7   12 13 6 4     11     2 1 15
  8 12     14   15     4 7 1   2  
12           8 3 1 16   6        
11 12 13 5         4   3     16   8
    9 16 3 15     8 10 6 2     7  
5 6 15   11 12 14 2 3 4         8 10
  9   13   5 4 8   6            
8 16 1   13 3 5   11   10 4 12 6    
Showing puzzle number: 968
Puzzletype: Symmetrical Sudoku
Startnumbers: 136
Difficulty: Hard (0)
Solution methods: SiSo SC DC
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