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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.

40326061 puzzles downloaded.

  5           2  
        1 3      
8   6 2       9  
      6          
          5     3
5       2 9     4
3           8    
1 6 2 8     5    
  4         6    
Showing puzzle number: 3843086
Puzzletype: Optimal Sudoku
Startnumbers: 24
Difficulty: Super hard (91)
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