Langer's Sudoku Assistant

Invalid Sudoku!

Column 7 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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