Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Go back and make a different choice.

 

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

 

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