Langer's Sudoku Assistant

Invalid Sudoku!

Row 9 is invalid. Column 6 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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