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Sudoku puzzles (Su Doku)

My database includes 242 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every box contains the digits 1 through 16. The grey boxes is even numbers and the white boxes is odd. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

222411 puzzles downloaded.

15                   12 4        
      16   4           1       13
        14           3       2  
  3 5 11         14 6 13          
      15     3       9          
              12 3 1 8   5      
5                   16         14
8 14         2 7         3 6    
    12 14         13 7         8 4
16         13                   3
      4   12 16 9 5              
          2       16     10      
          14 9 6         2 12 5  
  11       7           9        
10       15           4   1      
        12 1                   10
Showing puzzle number: 53
Puzzletype: Symmetrical Sudoku
Startnumbers: 66
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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