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Sudoku puzzles (Su Doku)

My database includes 936 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 9. 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.

206723 puzzles downloaded.

                4
  5              
              9  
    6            
                 
            1    
  8              
              5  
3                
Showing puzzle number: 636
Puzzletype: Symmetrical Sudoku
Startnumbers: 8
Difficulty: Super hard (535)
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