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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.

293783 puzzles downloaded.

          12   5   16 2 15 9     10
15 12   3 1     4 8 13 5 10   14 2 16
4 3 14   11     7 15       2     6
      7 13   12 16   14       2   8
2         8 11     15 1   4 3   12
  4 11     13   8       7 14 12 3  
3 7   15 10   1 6         5   4  
8   12     4 10 11   9 3 6 7 5   15
16   1 12 2 7 9   5 10 6     4   11
  13   14         9 5   16 6   11 1
  1 5 10 3       11   15     16 8  
11   10 2   5 16     8 12         13
13   8       7   12 3   5 15      
9     16       3 2     1   13 5 4
5 9 6   15 14 3 13 16     2 8   1 7
1     8 6 15 5   4   13          
Showing puzzle number: 1155
Puzzletype: Symmetrical Sudoku
Startnumbers: 138
Difficulty: Harder (0)
Solution methods: SiSo SC DC XW
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