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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.

708665 puzzles downloaded.

  16   9   10 8                 11
    10   2   16 12             13  
          13   7   6         15  
5   4         1 13   9 15     10 12
  3 2   12 15       4 13 10 8 16    
16       7           14          
    13         3 15     12 10   2  
4   11         10     2     1 7  
  15 6     7     4         14   16
  7   13 10     16 5         8    
          3           2       1
    5 16 8 9 13       6 11   3 12  
11 6     15 1   4 2         7   14
  10         5   1   4          
  9             14 12   7   13    
15                 10 5   4   11  
Showing puzzle number: 521
Puzzletype: Symmetrical Sudoku
Startnumbers: 92
Difficulty: Very easy (0)
Solution methods: SiSo SC
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