Langer's Sudoku Assistant

Invalid Sudoku!

Column 7 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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