Monticelli Trap

Leave a knight hanging and jump to g5 instead — two threats the fianchettoed bishop can't survive.

Bogo-Indian Defence — Black falls in with Nxc3

Trap data: Wikipedia — Bogo-Indian Defence, Monticelli Trap (CC BY-SA 4.0); Lichess chess-openings (Bogo-Indian Defense: Monticelli Trap, ECO E11) (CC0-1.0).