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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.

596629 puzzles downloaded.

      12 15 2   9   4       6 10 3
        1 16 13                 2
          8       9   11   7   15
5 14     10     3             8 12
      7 12   14 10     5   3 16 11 9
9   2     1   11           4 6 8
    14             11   16     7  
        5     8     6     10    
    8     5     2     12        
  5     13   16             3    
10 9 13           8   11     5   4
3 1 15 6   11     7 5   10 9      
4 15             13     1     9 10
14   10   7   5       15          
7                 2 9 6        
1 13 16       6   11   12 5 15      
Showing puzzle number: 922
Puzzletype: Symmetrical Sudoku
Startnumbers: 94
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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