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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.

1072608 puzzles downloaded.

      9   7     8   12 2   10 3  
      10 15 16   11     14          
  3     1 2   12     10          
2   16     3 8   4 6   9 12 14   11
11         5     7     16       12
      16       7         14 2 10  
3     6 12   16 14               15
      7 2 11           5 8 9   1
16   10 3 11           4 1 6      
7               15 12   3 11     14
  12 8 11         14       7      
9       7     6     11         16
6   4 14 10   2 8   1 3     12   9
          12     16   5 10     6  
          9     6   13 7 15      
  8 7   16 6   4     2   1      
Showing puzzle number: 4735
Puzzletype: Symmetrical Sudoku
Startnumbers: 100
Difficulty: Super easy (0)
Solution methods: SiSo
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