Langer's Sudoku Assistant

Invalid Sudoku!

Row 5 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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