Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 8 is invalid. The middle right 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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