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.

 

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

 

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