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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.

1153565 puzzles downloaded.

9     11 16             13   3   2
2                 5       7    
    13 5   11 7   2 4     15 12 16  
    14 4     3     15   9 5      
7   5 16     10           14     3
        2 12       14     4 9    
          4     15     7 12 5 1 16
8     10     15 3             11  
  1             10 16     7     12
5 3 6 13 7     15     12          
    8 7     1       15 6        
12     14           9     8 1   6
      1 15   11     12     16 10    
  16 7 3     9 1   6 10   11 14    
    10       2                 8
15   9   10             14 2     7
Showing puzzle number: 3338
Puzzletype: Symmetrical Sudoku
Startnumbers: 94
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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