Langer's Sudoku Assistant

Invalid Sudoku!

Row 9 is invalid. Column 4 is invalid. The bottom center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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