Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 1 is invalid. The middle left 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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