London System

A solid, reusable setup for White — bring the bishop out to f4 *before* e3, build the c3–d4–e3 triangle, and play it against almost anything.

1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Nc6 5.Nbd2 e6 6.c3

Opening data: Lichess chess-openings (Queen's Pawn Game: London System, ECO D02) (CC0-1.0).