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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.

623022 puzzles downloaded.

4   2     12   9         7 5    
11   8   13 2       12         6  
10   1 13 7                 11 4  
              4     6 7     2  
              3 11              
8 14     16       7     6   4 13  
    3       13   1 15 16 8 6     7
  15   7     4   3     10 9 8   16
7   16 4 11     1   8     3   12  
3     9 14 4 7 13   10       16    
  5 10   6     12       14     9 11
              5 12              
  9     1 13     10              
  1 5                 9 8 6   14
  13         9       8 11   7   10
    4 11         5   15     9   12
Showing puzzle number: 4307
Puzzletype: Symmetrical Sudoku
Startnumbers: 94
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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