Langer's Sudoku Assistant

Invalid Sudoku!

Row 2 is invalid. Column 7 is invalid. The top right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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