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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.

562402 puzzles downloaded.

6     1   9     2       15 8 16  
16 9           13 7 8   3 2     14
  8               12     3      
  14                 1 13 10      
    14       13 12   16     7 6   11
    6   7 10             1 3 12 5
4               3         13    
7 5 12 3     6   14   13          
          7   15   3     11 16 13 12
    8         3               7
5 12 13 10             16 15   1    
9   3 16     5   4 1       15    
      5 15 11                 14  
      6     3               10  
12     15 16   7 9 11           3 8
  11 9 14       5     6   16     4
Showing puzzle number: 2590
Puzzletype: Symmetrical Sudoku
Startnumbers: 92
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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