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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.

615877 puzzles downloaded.

    7   1 9 4 10 16             14
15 13               4   14   7   10
  5 4       7 6   2           8
              12   7     4 5    
  10 6     12 3     16 11          
7 12     6     13   3       16    
    3 13   1   15 2     7 6 14 5  
2     16 5   11       9 4       3
9       13 3       11   6 2     12
  1 5 2 8     16 4   3   13 6    
    8       2   10     12     4 1
          4 12     5 2     10 16  
    13 3     5   6              
6           9   15 10       11 8  
4   12   15   10               6 9
16             11 3 12 14 2   15    
Showing puzzle number: 3496
Puzzletype: Symmetrical Sudoku
Startnumbers: 102
Difficulty: Super easy (0)
Solution methods: SiSo
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