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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.

7     1 4 8    
        1     2
1 4     2     6
    5          
          2    
6     8     1 4
5     6        
    7 4 8     5
Showing puzzle number: 167104
Puzzletype: Symmetrical Sudoku
Startnumbers: 22
Difficulty: Very hard (0)
Solution methods: SiSo SC SB FI
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