Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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