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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.

1153565 puzzles downloaded.

              14       4 3   10  
            16 2 7         8 15 5
4       6   12           1     13
11 8                         16 7
5     1           8   14 10      
      3   16     2   5       4 11
    8   5   1 15 10     11 12     3
  11 14 6 9     12     1          
          7     14     9 8 2 6  
8     12 14     9 1 2   5   15    
7 6       12   11     13   4      
      2 8   6           13     1
3 5                         1 4
10     11           4   8       12
16 7 2         10 11 1            
  14   15 3       13              
Showing puzzle number: 2212
Puzzletype: Symmetrical Sudoku
Startnumbers: 88
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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