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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.

823419 puzzles downloaded.

      1 14       9     16     3  
13   4   2           5   12   11  
8 5             13 12 3       10  
2   16 11           1   8        
          11                   7
3       15           1 5 9      
12 13 5   1     2   10       11 6  
  14 15 6   13   16   9 7     3   1
5   6     14 1   15   2   7 13 8  
  3 8       2   5     13   6 1 11
      13 9 7           6       15
14                   4          
        10   13           5 12   14
  4       9 14 7             15 8
  9   5   6           2   4   10
  6     8     5       10 16      
Showing puzzle number: 76
Puzzletype: Symmetrical Sudoku
Startnumbers: 92
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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