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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.

147035 puzzles downloaded.

                1       13 9    
      13     10         4 11      
6         3           12   14    
  11       2       9   6   1    
  6     8         14   13 15 4   1
      16                 2   6  
    9         15     6 2   13    
                      3       12
12       2                      
    13   5 1     9         16    
  10   5                 12      
9   3 2 6   7         5     13  
    2   4   15       14       1  
    11   1           5         4
      1 3         8     10      
    5 7       8                
Showing puzzle number: 222
Puzzletype: Symmetrical Sudoku
Startnumbers: 66
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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