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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.

1145118 puzzles downloaded.

  12 2     1   5           11    
3   8   10   13         11       2
10     13         14         16 4  
7   14   9 4     6             10
6       7 11   13     14 12       15
13       12         6     8     4
                5   10 7   6 11  
1 4   8   5   9   13            
            11   3   13   14   16 12
  15 6   5 13   3                
12     3     16         8       6
2       8 10     7   6 1       9
9             2     8 13   15   11
  13 5         14         2     8
14       15         12   2   7   1
    15           10   5     14 9  
Showing puzzle number: 1802
Puzzletype: Symmetrical Sudoku
Startnumbers: 90
Difficulty: Very easy (0)
Solution methods: SiSo SC
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