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.

 

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

 

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