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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.

1153565 puzzles downloaded.

      6 12       14         7 9  
10 1     15 6 9     16 7   3 11    
  3       7               10 2  
4     8 11 13 5 2   3 9          
  15         12             5    
  11       14   9           8 1  
    6 12 2     5 1 13         7  
      13 3 8     7 10   2   14    
    9   10   14 16     2 8 13      
  4         11 15 13     10 7 9    
  13 3           16   11       4  
    8             9         5  
          12 6   9 15 3 1 4     5
  9 12               14       6  
    10 4   9 2     6 13 7     12 15
  6 15         8       4 11      
Showing puzzle number: 3461
Puzzletype: Symmetrical Sudoku
Startnumbers: 96
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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