Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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