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.

 

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

 

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