Langer's Sudoku Assistant

Invalid Sudoku!

Column 2 is invalid. Go back and make a different choice.

 

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

 

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