Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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