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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.

399572 puzzles downloaded.

  7     16   8 15 13 14   3   4 2  
1   8 7   15 13   12 11   5   16 10  
8 6   13 12         4 3 15   5 1  
5 11     13       3 15 10 6   2 16 14
      2 15 1   16 8         10   3
  10   4 1 11       16 8 13 2      
7 3             11 10 5 16 15   8  
      12       8 16       14 9   6
2   16 10       12 5       6      
  1   8 2 10 9 11             5 7
      16 9 14 3       7 10 13   6  
9   15         1 6   14 8 10      
4 5 1   6 16 12 3       9     14 13
  14 12   3 5 10         2 9   13 1
  2 6   8   11 10   9 4   5 15   12
  4 11   7   5 9 15 13   14     12  
Showing puzzle number: 1569
Puzzletype: Symmetrical Sudoku
Startnumbers: 134
Difficulty: Very hard (0)
Solution methods: SiSo SC DC XW SF
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