Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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