This is a common tactic in various openings. It goes like this:
- A bishop pins your knight to your queen
- You sacrifice your bishop with check to attract the king forward
- You give a check with your "pinned" knight to win the bishop that pinned you
Here is an example:
[FEN "rn1qkb1r/pp3ppp/2p2n2/4p3/2BPP1b1/5N2/PPP3PP/RNBQK2R w KQkq - 4 7"] 7. Bxf7+! Kxf7 8. Nxe5+ Kg8 9. Nxg4
Does this tactic have a name?