Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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