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.

 

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

 

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