Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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