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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.

715969 puzzles downloaded.

  15   8   12           16   3   6
  16   12     13 11   9       5    
    4             11 14   16   9  
          5         7 3   2 14  
      14     16 9   13 11 7   6 3 1
10 12 8 9     7       15         16
                2              
7                 6 1         9
4         6 10                 13
              7                
15         11       14     5 9 4 2
2 14 13   8 4 1   6 7     3      
  11 6   1 13         2          
  10   5   16 15             11    
    12       4   11 8     13   15  
1   2   3           16   6   12  
Showing puzzle number: 2879
Puzzletype: Symmetrical Sudoku
Startnumbers: 86
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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