Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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