Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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