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Sudoku puzzles diagonals (Su Doku)

My database includes 5816 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 4x4 box contains the digits 1 through 16. The diagonals must also contain 1 through 16. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

611707 puzzles downloaded.

1 3               14   9       13
9   6       8     15       4   2
7 8 10 4   12 3     6 2     9    
        9     11               14
          5 10 3     16          
2   9 1   15           13 16 11 3 12
  7       2 13               8  
                  4 8 7 5      
      6 10 9 11                  
  4               2 11       9  
3 1 14 2 12           9   10 15   11
          3     13 1 15          
4               15     16        
    1     7 4     9 13   14 5 12 8
11   8       1     3       13   15
10       13   12               4 6
Showing puzzle number: 1015
Puzzletype: Symmetrical Sudoku
Startnumbers: 88
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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