Langer's Sudoku Assistant

Invalid Sudoku!

Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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