Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 7 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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