Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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