Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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