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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.

1074315 puzzles downloaded.

    15   7       12 11 5       10 6
6             12           3   5
        10 5           3 4   16 14
        3     4 6     15       12
  6     5           7 4 16 10    
15 1 14 5   4       3   8        
    16   15             2 14 11    
  12 10 9       14 5     6 2     8
10     2 9     7 3       11 5 14  
    6 8 13             5   4    
        6   14       13   12 16 9 7
    3 16 12 15           11     1  
16       8     9 14     13        
9 3   6 14           4 1        
13   7           16             11
8 5       1 12 11       9   14    
Showing puzzle number: 4151
Puzzletype: Symmetrical Sudoku
Startnumbers: 96
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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