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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.

1132021 puzzles downloaded.

3         1   13   4     10      
    14 16 6       13             5
9     13 5       6              
15           9     7       8   6
  6         1   8 10 4   12   11  
13   9   11 8 5     14            
5 10     2 14         11 9   6 8  
11 7       9   10       13   5    
    1   14       11   10       3 12
  12 10   8 16         13 7     9 15
            2     1 6 16   11   7
  16   7   15 12 11   3         10  
1   5       3     13           8
              16       15 11     13
16             8       6 7 1    
      9     11   4   7         2
Showing puzzle number: 280
Puzzletype: Symmetrical Sudoku
Startnumbers: 92
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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