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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.

100695319 puzzles downloaded.

        7     9  
8     3          
9   2   4        
            6 2 1
    4   8     7  
3                
          7 1    
4   8 1     3    
6     5     7    
Showing puzzle number: 3836811
Puzzletype: Optimal Sudoku
Startnumbers: 23
Difficulty: Hard (0)
Solution methods: SiSo SC SB DC
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