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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.

    5               1 7        
    3       12         9   5 7  
  14 15 16 6 4 5                  
9   12   10         14     2   8  
  15   12 7   11 6 13   3 14 4      
6   2   13       1 16           14
      1       9         6      
    10     16 8     12   2     15 9
13 12     11   9     5 14     2    
      4         16       9      
14           16 3       8   11   15
      5 4 7   14 9 11   13 8   12  
  2   3     6         1   15   4
                  8 5 11 12 3 6  
  1 8   3         10       14    
        12 11               1    
Showing puzzle number: 1630
Puzzletype: Symmetrical Sudoku
Startnumbers: 90
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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