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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.

704211 puzzles downloaded.

  9 10 16   8 3       6   4 13    
4         10         9 3        
    6     14 7   1              
  12     9 6     10         8 16  
3 11                 10          
  8 9     15 5   13           2  
2 15   10 12         8 11   13 9    
13       4 7     9     16 12   3  
  4   9 3     11     14 6       1
    7 1   9 16         10 15   5 13
  6           7   11 8     16 14  
          2                 8 6
  10 5         6     16 9     12  
              3   6 12     5    
        14 16         7         15
    14 3   4       2 15   16 7 13  
Showing puzzle number: 4312
Puzzletype: Symmetrical Sudoku
Startnumbers: 92
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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