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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.

101716304 puzzles downloaded.

1       6        
    2     3   1  
                8
4   3       8    
        1     7  
        7 5   2 4
  6 4 7 5        
8   7 2       4  
  2   8         9
Showing puzzle number: 5943493
Puzzletype: Optimal Sudoku
Startnumbers: 26
Difficulty: Super hard (28)
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