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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.

819175 puzzles downloaded.

    1 10 2 6       7 8 16        
  8 4               2 1   9 16  
14 7   9       16                
    13       4 1   12           5
  13           5             1 2
    8         4   15 1 3 5   10  
6     14     16   8     2 4     15
        15     12     7   16 8   14
13   14 7   9     5     8        
16     2 12     15   13     8     9
  6   4 14 10 7   16         2    
1 15             14           13  
10           3   2 8       11    
                9       2   7 8
  4 6   9 12               5 14  
        11 5 1       12 4 9 13    
Showing puzzle number: 588
Puzzletype: Symmetrical Sudoku
Startnumbers: 92
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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