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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.

1137622 puzzles downloaded.

  2 12               3       4 7
      4 14             15       10
  5 1     13 10       2   8   16  
                12 5 16   2 14 13 6
4 1       3   9       11 16     14
    16       2 8       7        
2 6 9 8 13 11 14   16   4          
10       7       8     12   2    
    6   11     13       4       16
          12   10   6 11 9 7 13 14 1
        15       13 10       3    
11     13 6       1   5       15 4
14 9 7 5   10 11 3                
  15   1   6       12 14     4 2  
6       12             10 14      
12 8       4               10 7  
Showing puzzle number: 2901
Puzzletype: Symmetrical Sudoku
Startnumbers: 96
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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