Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 1 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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