The Amar Opening (also known as the Paris Opening, or the Drunken Knight Opening) is a chess opening defined by the move: 1. Nh3 Analogous to calling the Durkin Opening the "Sodium Attack," this opening could be called the Ammonia Opening, since the algebraic notation 1.Nh3 resembles the chemical formula NH3 for ammonia. The Parisian amateur Charles Amar played it in the 1930s. It was probably named by Savielly Tartakower who used both names for this opening, although the chess author Tim Harding has jokingly suggested that "Amar" is an acronym for "Absolutely mad and ridiculous".