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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.

774461 puzzles downloaded.

  2       3 8  
        6 5    
5 7 4     6    
      8       7
3       4      
    8     7 2 3
    5 3        
  8 2       5  
Showing puzzle number: 142220
Puzzletype: Symmetrical Sudoku
Startnumbers: 22
Difficulty: Very hard (0)
Solution methods: SiSo SC FI
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