Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 2 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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