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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.

305169 puzzles downloaded.

  15 9 2 6         1 16         12
    13   10 2 4         12     3 1
1 11 12   4 15 9   6   13     2 5 8
8 16   7   6     9 10     2   4  
11 5   6 12   3 14             8 15
15   11 8   4   16 1 5       14   2
  4 2 1 7 12 15 11   14 9       6 5
        14 7   1   16   2 12 13    
    14 12 9   11   8   15 5        
6 14       9 7   2 11 3 1 4 12 13  
2   10       13 5 4   1   8 6   14
7 10             14 15   11 1   16 4
  8   3     2 10     4   16   1 9
14 2 5     13   8   12 10 3   4 9 16
16 7     13         4 2 8   10    
9         11 16         7 14 3 12  
Showing puzzle number: 572
Puzzletype: Symmetrical Sudoku
Startnumbers: 136
Difficulty: Hard (0)
Solution methods: SiSo SC DC
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