Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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