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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.

  15 1   9                     14
10 9 6 12                       7
            1     4 2       16  
  2 8       11 3 14   10         9
  16   14 13 5     12     3 4     6
  4       3 2 6       13 16 11 14 10
6             14   11   10     9  
8   7   1   15   16           5 13
9 12           7   8   5   14   11
  8     5   10   13             4
5 7 4 13 8       10 9 6       3  
3     11 4     1     16 14 6   12  
2         1   8 3 10       6 11  
  11       6 7     14            
7                       12 5 4 2
1                     4   9 7  
Showing puzzle number: 460
Puzzletype: Symmetrical Sudoku
Startnumbers: 98
Difficulty: Super easy (0)
Solution methods: SiSo
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