Langer's Sudoku Assistant

Invalid Sudoku!

Column 4 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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