Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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