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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.

913257 puzzles downloaded.

    6   3     16       7   12   9
        1       11 5         13 14
    7 14   6       13            
    4       10     1     16   6  
16   15   14         8   12 6     5
12 2         6 10         14      
6   3   5 7 9   16           4  
    11 1       8   6   14       7
3       9   15   5       10 6    
  6           5   2 3 10   9   12
      4         8 7         15 1
7     13 6   12         15   16   11
  12   10     13     4       2    
            2       12   9 11    
1 11         14 15       9        
5   2   12       7     8   10    
Showing puzzle number: 4761
Puzzletype: Symmetrical Sudoku
Startnumbers: 90
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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