Langer's Sudoku Assistant

Invalid Sudoku!

Column 1 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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