Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Column 7 is invalid. The middle center 3x3 Box is invalid. Go back and make a different choice.

 

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

 

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