Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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