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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.

1139916 puzzles downloaded.

    2 1 3   7 16         11   13  
  13   8               3 10     1
5       4 13 8   11             15
11       1 10                    
    12   6   15 7   13 9   1     3
  4         13 8   3 15 5 14   12  
8 16       3 1 5     12 6 4   2 9
9                       13 7 11  
  12 14 15                       4
13 1   3 8 9     12 15 16       5 6
  2   16 11 14 6   3 1         8  
10     4   2 3   14 6   11   13    
                    8 10       14
4             3   12 2 1       13
12     13 15               8   9  
  6   5         16 4   9 15 1    
Showing puzzle number: 1959
Puzzletype: Symmetrical Sudoku
Startnumbers: 102
Difficulty: Super easy (0)
Solution methods: SiSo
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