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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.

    6         8 5 15       1 7 12
    8 1   5       4 7 11 15     13
10 4   14   11 6                  
            13         8   16   11
          7           5   14   4
  8             4 10 3     5 15 6
      3 10         9 12          
12 2 13   5         7 1 6     3  
  1     13 9 14         3   12 16 10
          10 16         4 1      
16 9 2     6 7 5             11  
7   10   1           5          
15   1   7         11            
                  12 2   13   10 9
6     5 11 12 9       13   14 15    
4 12 9       1 15 3         11    
Showing puzzle number: 2075
Puzzletype: Symmetrical Sudoku
Startnumbers: 94
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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