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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.

600628 puzzles downloaded.

  9 7   2     3 14 6           13
    13 12   6   1           10   2
  14 1 2   7     4     12     9  
4   10 15   8 5     9            
  3     14 9     16 8         12  
15             12       13     1 9
13               3   2     16    
5         4 15     11 12     6    
    11     3 14     7 15         5
    9     15   11               3
14 15     5       13             7
  1         6 9     11 5     10  
            9     15 16   6 3   8
  13     12     7     5   10 9 4  
9   14           12   1   16 7    
7           1 16 10     4   15 14  
Showing puzzle number: 2990
Puzzletype: Symmetrical Sudoku
Startnumbers: 94
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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