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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.

758731 puzzles downloaded.

        3     13   10   4   14    
  3     11 5     14       1   8  
                15   8 13   11    
  10 8   1 4   9   2   3        
        10           6       14 11
    5 7     2   11     1 10      
10   14 2       11 16   15 8 4 5   6
16       12 13             8   2 7
8 15   13             9 11       14
14   7 10 2 1   5 3       6 12   9
      5 15     14   1     7 3    
6 2       11           5        
        8   11   1   4 6   13 7  
    10   5 9   4                
  5   4       6     12 10     1  
    15   13   12   8     14        
Showing puzzle number: 2556
Puzzletype: Symmetrical Sudoku
Startnumbers: 96
Difficulty: Very easy (0)
Solution methods: SiSo SC
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