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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.

4           6   13     2     11  
11     5 14         6     16   10 1
      12 2 16       9            
    1 13 3           16 11 6     4
  12   9         14 11   15   2    
10 1             7   9   5      
16 5       11 12 8               7
  3 6           12 1 4   15      
      7   5 14 16           10 15  
5               9 3 13       6 12
      11   13   6             1 14
    13   1   3 9         2   16  
1     14 6 15           4 11 12    
            7       15 9 1      
12 11   8     2         3 14     16
  13     9     11   14           8
Showing puzzle number: 3583
Puzzletype: Symmetrical Sudoku
Startnumbers: 92
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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