Langer's Sudoku Assistant

Invalid Sudoku!

Column 7 is invalid. Go back and make a different choice.

 

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

 

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