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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.

271785 puzzles downloaded.

                2
  4 1            
  5   7          
9   6            
                 
            3   7
          7   1  
            4 6  
2                
Showing puzzle number: 31
Puzzletype: Symmetrical Sudoku
Startnumbers: 14
Difficulty: Super hard (103)
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