Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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