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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.

998699 puzzles downloaded.

          9       15         10  
14             15   13 3         7
      11     4 6     10 5 3   2  
    2     11   13         8 15 12  
2   7         3     16       8 13
3     12       14     5 9 16 7    
  13 8         9             5  
  14 5   13         1   7 10   15 3
11 16   8 5   12         3   9 13  
  3             1         14 4  
    4 9 11 1     5       7     12
12 1       2     15         16   5
  12 1 2         14   13     11    
  8   5 2 16     12 10     13      
7         13 9   3             10
  6         10       1          
Showing puzzle number: 829
Puzzletype: Symmetrical Sudoku
Startnumbers: 92
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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