Langer's Sudoku Assistant

Invalid Sudoku!

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

 

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

 

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