Langer's Sudoku Assistant

Invalid Sudoku!

Column 2 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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