Langer's Sudoku Assistant

Invalid Sudoku!

Row 9 is invalid. Column 5 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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