Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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