Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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