Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 6 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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