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Sudoku puzzles (Su Doku)

My database includes 6913752 puzzles for the moment and I'm constantly generating more.

Rules: Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9. There is only 1 solution for each puzzle.

For more information check out Wikipedia.

50044711 puzzles downloaded.

1     2   9      
  3   1 4 7      
    7 3 8 6      
5 7 3       6 1 9
  4 6       3 7  
9 1 2       4 8 5
      8 6 4 9    
      7 3 1   2  
      5   2     7
Showing puzzle number: 6445523
Puzzletype: Symmetrical Sudoku
Startnumbers: 38
Difficulty: Very hard (0)
Solution methods: SiSo SC SB DS DC NS
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