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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.

1153565 puzzles downloaded.

  15         10 11 9              
  1 6 14     12   15     10   4   7
    12     5     2   3 6   9 11 13
2       3     16   8 11     10    
          12 3       9   6 1 14 10
    7 1 16   15     2     11     3
9                 7   8 12      
  14   10         3 15            
            2 1         9   16  
      15 14   13                 6
10     6     8     3   1 13 7    
14 11 1 13   16       10 7          
    2     6 14   12     16       5
15 9 10   8 3   12     5     6    
5   14   4     10   13     8 12 2  
              5 4 6         9  
Showing puzzle number: 3516
Puzzletype: Symmetrical Sudoku
Startnumbers: 96
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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