Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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