Langer's Sudoku Assistant

Invalid Sudoku!

Row 4 is invalid. Go back and make a different choice.

 

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

 

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