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Sudoku puzzles (Su Doku)

My database includes 6913752 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

100967545 puzzles downloaded.

  7   1         5
9 2              
    4         9 6
      7 1        
  9 6         1  
      3   8      
  4   9   5 7    
  8 3   7        
      8   1 4    
Showing puzzle number: 5343027
Puzzletype: Optimal Sudoku
Startnumbers: 25
Difficulty: Super hard (138)
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