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Sudoku puzzles (Su Doku)

My database includes 300320 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 2x4 box contains the digits 1 through 8. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

852636 puzzles downloaded.

1   6 4        
  8           6
  7 4   3 6    
        4     1
2     7        
    5 8   7 1  
5           8  
        5 2   7
Showing puzzle number: 38260
Puzzletype: Symmetrical Sudoku
Startnumbers: 22
Difficulty: Super hard (38)
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