Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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