Langer's Sudoku Assistant

Invalid Sudoku!

Column 4 is invalid. Go back and make a different choice.

 

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

 

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