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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.

708690 puzzles downloaded.

      4 7      
    3         6
6       2 4    
  4 8 7 6      
      6 3 5 2  
    2 5       4
5         3    
      1 4      
Showing puzzle number: 178772
Puzzletype: Symmetrical Sudoku
Startnumbers: 22
Difficulty: Very hard (0)
Solution methods: SiSo SC SB DS NS
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