What is the origin of the idiom "make the first move" and when to use it?

The idiom "make the first move" is believed to have originated in the 19th century. It is thought to be a reference to the idea of making the first move in a game of chess, which is to move one's own piece before the opponent. In the context of romance, the idiom means to take the initiative and make it clear that one is interested in someone.