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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.

135280233 puzzles downloaded.

    1       8    
  6       8   1  
4     1   2     9
        6     4 8
    4 3   1 5    
2 5     4        
1     7   6     3
  3   9       7  
    9       6    
Showing puzzle number: 4372145
Puzzletype: Symmetrical Sudoku
Startnumbers: 28
Difficulty: Super hard (136)
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