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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.

885272 puzzles downloaded.

      4 10 5     11 9   7   13   1
              6 3   4     7    
1 12 13 7 11 2             5   9  
6             3 13 2 12         15
  11           15 4              
  10   5                 7     8
        4     5 15   10 3 16   11  
15 6   9               2 14   3  
  4   16 15               6   1 9
  1   3 6 4   2 8     9        
10     12                 13   4  
              12 10           5  
14         16 8 13 1             2
  3   10             8 14 1 5 15 12
    4     12   10 16              
7   11   3   2 1     13 12 4      
Showing puzzle number: 3705
Puzzletype: Symmetrical Sudoku
Startnumbers: 92
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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