W-Wing
Two distant cells hold the same two candidates, and a strong link joins one of those digits. The other digit goes from every cell both cells see.
How it works on this board
A strong link on 4 makes 7 true in at least one of the two bivalue cells
8
3
7
2
3
2
4
5
8
3
2
9
6
8
1
6
4
5
4
3
1
5
6
9
8
3
3
4
5
6
3
No marks yetPosition 0 / 2