Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

2
5
      3
       
7      
7
1
4
6
8
4
6
1
9
3
7
5
2
4
7
4
      3
       
7      
      3
       
7      
2
9
8
5
1
6
1
4
6
8
3
   2   
       
7      
5
9
2
9
8
2
1
5
6
4
3
2
3
       
   5   
7      
2
9
4
   2   
       
7      
8
6
1
9
6
1
3
2
5
4
7
8
8
2
4
7
9
1
5
6
3
7
      3
   5   
       
      3
   5   
       
6
8
4
1
2
9

 

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