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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.

1106239 puzzles downloaded.

    14 1     5 13 3           6  
  10   7   12               1    
  9 6     11   10   15 13       4  
  11 12         16           7   5
      9 16     1     2         3
7   11   6       1 9 5         8
          8           6     15  
  13 2 10 11 5     15         4   6
15   13         8     16 7 6 14 1  
  1     5           15          
3         13 11 2       5   15   16
2         4     10     9 3      
6   9           16         3 12  
  14       6 7   9   12     8 16  
    16               7   2   14  
  5           4 6 1     9 13    
Showing puzzle number: 5657
Puzzletype: Symmetrical Sudoku
Startnumbers: 90
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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