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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.

                  8 16          
    6 16             10 13 7      
4 13   10         12 5 2         14
12   1   13   4 11 9 3       6   15
8       6         2     3   13  
  3 14     13   5   16   11       2
          3 16     1     6   15 5
    13 15 8   11   3     12        
        14     16   15   8 11 2    
14 15   12     6     11 4          
13       4   3   16   5     14 10  
  1   5     10         7       4
10   5       12 4 6 9   2   1   8
1         14 15 6         16   9 13
      4 1 11             15 5    
          5 13                  
Showing puzzle number: 3670
Puzzletype: Symmetrical Sudoku
Startnumbers: 94
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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