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

 

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