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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.

299308 puzzles downloaded.

1 7         4 8 11 14 9 15   2   16
    15       13   16       3   5 7
10         5 7 9 2     4   15   1
    8   9 10 6 2   12 16   14 5   15
7   10   11   3   8 1 12   2   16 4
  1 5 11 6           15 2       12
  5 12   8     10 14 2       13    
      15 13 6     4   10 12     1  
  9     14 13   7     3 1 11      
    1       2 3 5     11   8 12  
12       15 14           5 13 1 9  
3 12   10   9 15 6   7   16   4   14
2   11 4   16 8   7 9 13 6   10    
14   4   2     16 3 5 8         9
15 14   3       1   16       11    
4   2   1 12 16 13 9 10         8 3
Showing puzzle number: 158
Puzzletype: Symmetrical Sudoku
Startnumbers: 130
Difficulty: Harder (0)
Solution methods: SiSo SC DC XW
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