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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.

593673 puzzles downloaded.

      4         7 15     5      
    11           5 12   13        
  16 15 5 12       6 9   3        
    13                   14 16    
      6 2   15   4   11 1   14 5 3
11     7 3     4       16     6 2
              5         9 1    
14 15 16   1   12 8     7     4    
    8     3     11 10   9   6 7 12
    10 16         2              
1 11     4       14     8 13     15
13 2 5   15 1   6   3   4 11      
    9 8                   5    
        16   4 3       5 6 9 11  
        6   1 12           13    
      1     11 9         15      
Showing puzzle number: 5783
Puzzletype: Symmetrical Sudoku
Startnumbers: 90
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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