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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.

718886 puzzles downloaded.

    5 4         16       3   1  
    1   10 3 2     4   7   16    
    15 16       8 14     6 10 9    
  2 10     5           11   6 12  
          10   2         1      
  16 7       4   1     2   13   5
  8 4     16 9   10     5     11 7
      6 14 13                   3
6                   8 15 12      
10 1     9     7   2 3     8 16  
16   8   6     12   14       11 3  
      15         13   11          
  3 11   2           4     1 5  
    12 5 1     4 11       8 10    
    6   5   15     16 7 1   3    
  14   9       6         2 4    
Showing puzzle number: 986
Puzzletype: Symmetrical Sudoku
Startnumbers: 94
Difficulty: Very easy (0)
Solution methods: SiSo SC
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