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Sudoku puzzles (Su Doku)

My database includes 17735 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.

328232 puzzles downloaded.

              9  
9   8       6 1  
2         9   8  
  8       5      
        9        
      8       6  
  4   5         9
  3 5       2   6
  7              
Showing puzzle number: 12114
Puzzletype: Symmetrical Sudoku
Startnumbers: 21
Difficulty: Super hard (52)
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