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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.

696607 puzzles downloaded.

3 9 8 13   5 16   6 11     7   12  
          4 6         8   2 10  
11 12 16   2         4 9     8 6 1
  2         11   12     5   16   14
8     11   3 1   7       4 14 5  
      7         9           8  
        14 9         3 10 2   11  
  10               2   16 3 15    
    1 12 4   10               7  
  4   3 11 8         7 12        
  15           5         11      
  8 6 2       15   10 14   16     3
1   14   16     7   6         2  
9 7 11     13 2         15   5 1 4
  16 12   3         7 11          
  6   8     4 9   13 5   15 11 16 7
Showing puzzle number: 1598
Puzzletype: Symmetrical Sudoku
Startnumbers: 104
Difficulty: Super easy (0)
Solution methods: SiSo
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