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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.

1108309 puzzles downloaded.

12 14   6       10 3 8 7         5
      16 9     7         6      
        6 16   11         1   10 7
            1   16 11   6   8 9  
            8 15                
      8 13     5           14 3  
          12 6           4 10 8  
9 7     11 2 16     14 4     5 15  
  2 8     1 5     4 13 3     16 15
  6 16 4           5 14          
  13 14           8     1 3      
                12 6            
  10 11   4   14 3   16            
2 12   5         14   3 10        
      13         1     15 12      
1         9 10 13 11       5   6 8
Showing puzzle number: 905
Puzzletype: Symmetrical Sudoku
Startnumbers: 90
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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