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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.

658559 puzzles downloaded.

14 4     2     16           9    
9     8           10   2        
1   12     5 9     15   11        
13 5     10 14   7         4   15  
      15         2 8 4 1 6   16  
2     7 3     14 6 11 9   10     8
                    14       3  
4   6   16             10 12 13   9
16   3 13 1             4   12   5
  6       13                    
15     5   6 11 10 8     9 13     3
  2   10 12 3 14 15         8      
  12   14         1   11 7     8 6
        8   7     14 6     4   13
        14   10           9     15
    13           15     5     12 10
Showing puzzle number: 1082
Puzzletype: Symmetrical Sudoku
Startnumbers: 94
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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