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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.

    11   1 15   9 10       12      
  3 13         6 12 1   5        
15         16     8 11   2       3
6         5     3         2   9
3 10               2   6   7 1 14
12     7   6       16           2
    16 2       12     7 9        
    4     7 5 11   14   3     15 16
2 15     10   12   14 9 13     6    
        6 14     7       4 11    
9           4       2   1     15
7 14 6   9   13               16 12
14   1         3     8         11
11       4   6 14     15         8
        15   7 2 9         14 13  
      9       5 16   1 14   3    
Showing puzzle number: 5667
Puzzletype: Symmetrical Sudoku
Startnumbers: 96
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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