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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.

175491 puzzles downloaded.

            5 1
        4   7  
        8      
7   4   6 3    
    2 3   4   8
      6        
  3   2        
5 1            
Showing puzzle number: 18184
Puzzletype: Symmetrical Sudoku
Startnumbers: 18
Difficulty: Super easy (0)
Solution methods: SiSo
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