Langer's Sudoku Assistant

Invalid Sudoku!

Column 5 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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