an Entity references as follows:
The Trompowsky Attack (or Trompowsky Opening, also known as the Opočenský Opening, the Ruth Opening, and the Zot) is a chess opening that begins with the moves: 1. d4 Nf62. Bg5 White prepares to exchange the bishop for Black's knight, inflicting doubled pawns upon Black in the process. This is not a lethal threat; Black can choose to fall in with White's plan.