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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.

    3   15 14   9       7   16 6  
8           4   10 15   5   7    
14 7     2 6 5 3 13     12        
4 15 12       1     6         9  
15 16   6 13     12                
9         7 10   5 3     1 8    
10     8   1 14 11   4       13    
    4       3 15     12     14 16  
  12 15     8     3 9       6    
    13       6   11 10 7   12     5
    14 7     11 5   13 4         8
                12     1 15   3 4
  8         2     11       4 13 14
        8     7 6 5 13 10     15 16
    11   3   12 14   1           6
  2 6   10       14   8 4   11    
Showing puzzle number: 3104
Puzzletype: Symmetrical Sudoku
Startnumbers: 104
Difficulty: Super easy (0)
Solution methods: SiSo
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