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.

 

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

 

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