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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.

188105 puzzles downloaded.

      1       6
6 8     7      
          8 7  
  5         6 1
2 4         3  
  6 7          
      4     5 3
5       4      
Showing puzzle number: 8787
Puzzletype: Symmetrical Sudoku
Startnumbers: 20
Difficulty: Super easy (0)
Solution methods: SiSo
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