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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.

592291 puzzles downloaded.

    5 15 9 2     8 13           10
  11 10                          
        10 3 15       14 6     13  
              5 1 7       6   15
      11 6 14 12   9 5            
    15   11     8     12 7     3  
  5 1 4             10     12   2
9 13 14   16       3 1   2   11 6  
  15 2   5   7 13       1   10 4 9
1   12     8             13 5 15  
  4     1 6     5     15   16    
            9 3   8 11 14 12      
10   4       11 15 14              
  8     12 4       10 5 13        
                          7 10  
7           10 16     1 12 6 14    
Showing puzzle number: 4662
Puzzletype: Symmetrical Sudoku
Startnumbers: 94
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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