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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.

40765547 puzzles downloaded.

      2   3 7    
    6   1     9  
    9 8     5 2  
            8    
  3 7           2
2 6       8      
    4           7
        6 2   4  
      1       8 9
Showing puzzle number: 1824524
Puzzletype: Optimal Sudoku
Startnumbers: 25
Difficulty: Very hard (0)
Solution methods: SiSo SC SB DS DC NS FI
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