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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.

913440 puzzles downloaded.

          2 1     3 4 8     5  
      15     5 12 1     9        
  7   1 6 10 9       14     15    
    13     7   11 5 12     2     6
5     14 11     2   10     6      
7 9       13           14     11 16
6         8 16           4 14    
  8   2   15       9         10  
  6         4       9   16   13  
    15 9           14 7         1
12 13     3           6       7 14
      16     10   13     3 9     5
14     3     11 10 12   13     16    
    9     6       8 11 2 5   14  
        7     4 14 16     10      
  11     15 16 2     5 3          
Showing puzzle number: 2922
Puzzletype: Symmetrical Sudoku
Startnumbers: 94
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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