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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.

848599 puzzles downloaded.

    8 7     5  
    1     2 7 3
      4       8
    7          
          8    
4       3      
3 1 4     7    
  6     5 1    
Showing puzzle number: 127903
Puzzletype: Symmetrical Sudoku
Startnumbers: 20
Difficulty: Very hard (0)
Solution methods: SiSo SC SB DS XW FI
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