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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.

1064615 puzzles downloaded.

        9   15 2   4     1 12    
13     12 6   10     16       9 5 11
4         1       5         7  
  6     8   4 11   2   1        
8 5 14     11 12     15 9 16   1   2
    12 3   10 1       4   5 14 8 7
        13   8             16    
      2 15 14     1              
              15     16 7 14      
    3             14   6        
5 10 6 1   9       8 15   16 3    
7   15   12 4 5     13 1     10 2 9
        4   7   5 1   10     12  
  16         6       2         10
12 13 9       14     7   15 2     3
    10 14     2   9 11   12        
Showing puzzle number: 3693
Puzzletype: Symmetrical Sudoku
Startnumbers: 100
Difficulty: Super easy (0)
Solution methods: SiSo
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