Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 2 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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