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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.

726979 puzzles downloaded.

  9         8 3                
3       1 12     2   4   8   15  
      8               16     14  
  6   15 9 2 11   7              
  8     2     13 11     12 10     16
  3 16 4           9   8   14   2
      7   1 3     16       11   12
9         10 14           6 1    
    8 9           10 2         14
14   2       6     11 16   3      
15   5   12   2           16 10 7  
4     12 7     9 13     6     2  
              11   6 5 3 13   1  
  5     14               11      
  4   3   5   2     10 15       6
                14 1         3  
Showing puzzle number: 4243
Puzzletype: Symmetrical Sudoku
Startnumbers: 88
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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