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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.

1064616 puzzles downloaded.

6   14       7             16    
    2   3   13       6 5     4  
    13 5 11 16 1 15       10        
  11   4 6                   14  
      16   13 15     1 10     4 3 9
              2 9 7     1 6    
      11 8   3       4     7    
12   1       9     8   16 11 2 15  
  6 7 2 14   4     3       12   16
    4     8       2   6 3      
    15 14     10 3 7              
3 13 5     2 16     4 12   9      
  5                   4 8   6  
        1       6 5 13 14 2 15    
  8     2 11       16   7   1    
    3             12       9   7
Showing puzzle number: 838
Puzzletype: Symmetrical Sudoku
Startnumbers: 94
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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