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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.

683561 puzzles downloaded.

7 12     11               9      
  13 14   8       6   4 7       3
  11   4 2 7 10           13     6
      6 4 14     3 11 10 1        
  7       4             12 5    
9   11       7 1   2   10 4      
  10   14   13                 16  
      1         8     4     7  
  1     13     9         5      
  6                 8   14   1  
      15 5   2   7 12       8   9
    16 2             9       3  
        10 5 14 16     11 12 15      
10     12           3 7 13 8   5  
2       1 8   13       16   11 9  
      9               8     12 4
Showing puzzle number: 323
Puzzletype: Symmetrical Sudoku
Startnumbers: 88
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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