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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.

680407 puzzles downloaded.

      7       11 14   15          
14     15   6   9 4       12   8 3
    3 9   16       10   13 1 15   7
                3 9           10
  14 1           15     4   8 3  
9 13 7     14 10 12 16 8       1 15  
16   6   8     5   2 13 14 11      
2     5   11   16                
                12   4   15     1
      1 14 4 12   6     15   2   5
  15 9       5 2 10 16 1     7 12 14
  12 2   13     1           10 9  
7           11 4                
15   11 12 6   14       7   10 5    
1 5   13       10 9   14   16     4
          12   3 5       13      
Showing puzzle number: 2500
Puzzletype: Symmetrical Sudoku
Startnumbers: 102
Difficulty: Super easy (0)
Solution methods: SiSo
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