Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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