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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.

114338 puzzles downloaded.

        5     7
    6         8
  7     1      
6       8   7  
  6   2       1
      1     4  
2         3    
1     6        
Showing puzzle number: 21357
Puzzletype: Symmetrical Sudoku
Startnumbers: 18
Difficulty: Very easy (0)
Solution methods: SiSo SC
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