Langer's Sudoku Assistant

Invalid Sudoku!

Row 6 is invalid. Column 4 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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