Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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