Langer's Sudoku Assistant

Invalid Sudoku!

Column 8 is invalid. Go back and make a different choice.

 

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

 

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