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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.

116713 puzzles downloaded.

2         8   3
  8 6 1        
  1 7          
        7      
      6        
          2 3  
        3 6 8  
6   8         5
Showing puzzle number: 4184
Puzzletype: Symmetrical Sudoku
Startnumbers: 18
Difficulty: Easy (0)
Solution methods: SiSo SC SB
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