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Sudoku puzzles disjoint groups (Su Doku)

My database includes 41726 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. The cells with the same color must also contain the digits 1 through 8. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

206681 puzzles downloaded.

7       3 1   5
               
    2     7    
6 1            
            7 3
    8     2    
               
5   4 2       7
Showing puzzle number: 34412
Puzzletype: Symmetrical Sudoku
Startnumbers: 16
Difficulty: Medium (0)
Solution methods: SiSo SC SB DS
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