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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.

1153456 puzzles downloaded.

    11         7 12   15   6   9  
          14                    
    14       12     13     3   5  
15     9 3 1         6 7        
10 5 3       15     12 11 9   13    
16 9 8     10         14     11    
  15             10 3     5     8
  11 1   4       15 16 7 5   10 6  
  12 7   6 3 10 5       1   8 11  
1     6     2 9             3  
    10     4         2     6 15 16
    2   1 13 16     6       5 14 9
        5 11         16 13 15     14
  1   16     4     14       12    
                    4          
  14   13   16   1 5         3    
Showing puzzle number: 4121
Puzzletype: Symmetrical Sudoku
Startnumbers: 92
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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