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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.

380953 puzzles downloaded.

  14 15         4   9 10   13   12  
        16   11   9 3 6 7 12 4 13 5
    16   15 14 7       4   3 11 10  
16   13 1   7 5   12     8     14 9
4   14       15 3       11   12 1  
9         13     11 15   10 14 5 7 8
7 8   14       10   6   4       15
  5 9 3   8   12   4 16 1 2   6  
  16   5 7 10 12   13   8   11 1 4  
12       2   16   4       10   11 14
15 4 5 8 11   2 7     9         13
  11 1   8       7 12       2   3
11 3     4     14   8 13   15 10   1
  9 3 4   11       7 2 13   15    
13 10 12 16 3 4 9 5   11   14        
  1   9   5 14   3         16 15  
Showing puzzle number: 227
Puzzletype: Symmetrical Sudoku
Startnumbers: 134
Difficulty: Hard (0)
Solution methods: SiSo SC DC
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