Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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