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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.

371354 puzzles downloaded.

13     6 1     12         8 7 15  
  12     5 7   16 3 1   6        
10 11 9 8 4   15     2       5 3  
      10   12 1 7 15 14       16   8
      2 15 4 13   11   6       10  
1   7       2 13 14 15   10 3 4 8 5
3       12 16     1     2   9 7 13
  15   4 11 3 7     6 13   5   2 12
14 9   5   6 8     3 15 13 2   16  
4 13 5   16     9     8 1       2
6 14 16 15 10   9 11 2 12       3   7
  6       9   14   5 2 7 15      
11   3       12 8 5 9 4   14      
  10 15       4     16   8 11 14 1 6
        13   16 5 7   9 12     4  
  3 8 16         4     11 10     9
Showing puzzle number: 924
Puzzletype: Symmetrical Sudoku
Startnumbers: 134
Difficulty: Very hard (0)
Solution methods: SiSo SC DC XW SF
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