Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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