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

 

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