The Trompowsky is a chess opening that begins with the moves 1. d4 Nf6 2. Bg5. Named after the Brazilian chess player Octavio Trompowsky, this opening aims to develop the bishop early and create pressure on the knight at f6. It is considered an aggressive and unorthodox choice, often leading to dynamic positions. This opening can catch opponents off guard, as it deviates from more common openings like the Queen's Pawn Game. The Trompowsky allows for flexible pawn structures and can lead to various tactical opportunities, making it a popular choice among players looking for an alternative to mainstream openings.