Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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