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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.

1153432 puzzles downloaded.

    1 4         12 6     14     9
13 6   7 8 14                 15  
  14 16 12           15 7 2     6  
      2   9 6 12 10         16 4  
2   3       7     13       15    
  13       15 8       16     14    
7     8 1             5 3      
6         5   11 2 1         10 13
9 8         14 13 4   2         12
      11 6             12 2     5
    2     10       11 3       8  
    12       11     9       13   10
  9 7         1 5 10 14   13      
  1     4 7 13           6 10 9  
  3                 6 9 11   7 16
11     13     10 9         8 5    
Showing puzzle number: 2957
Puzzletype: Symmetrical Sudoku
Startnumbers: 96
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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