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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.

773617 puzzles downloaded.

  10         8   7 11   16        
7   6 11   5         13     12    
      8 3       12 9       1 11 5
9     13       1     5   14      
12       10   7 9         16   1  
    15         11   13 7   9 8 14 3
                      4   5    
      1 2 4       5       11 13  
  5 10       12       11 7 3      
    16   4                      
8 4 3 15   16 11   2         9    
  1   14         8 6   5       4
      12   6     15       4     13
16 6 4       3 5       13 1      
    9     7         1   5 3   12
        12   4 8   16         2  
Showing puzzle number: 3364
Puzzletype: Symmetrical Sudoku
Startnumbers: 90
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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