Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 6 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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