Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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