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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.

853225 puzzles downloaded.

  4     6     1
  5 1         7
              2
    2 5 1 8    
    3 4 8 1    
1              
5         7 1  
6     1     2  
Showing puzzle number: 191232
Puzzletype: Symmetrical Sudoku
Startnumbers: 22
Difficulty: Very hard (0)
Solution methods: SiSo SC SB FI
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