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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.

783719 puzzles downloaded.

3     6         7     15     2  
    9         15 10         16   13
  15   7   4 13     16   14 11      
              5 11 6   2   15 1  
16     14     11   6              
7 8       15         14   1 5    
    2   4 13   9 15       10 3 16  
      10         13   1 5        
        10 5   3         13      
  14 11 3       13 1   10 7   4    
    15 16   9         13       10 11
              7   15     9     3
  5 13   8   4 16 12              
      8 7   9     10 6   12   5  
9   7         6 3         2    
  12     5     1         16     4
Showing puzzle number: 856
Puzzletype: Symmetrical Sudoku
Startnumbers: 90
Difficulty: Very easy (0)
Solution methods: SiSo SC
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