Ruy Lopez, Exchange Variation grandmaster play by Emanuel Lasker, and later invigorated with new ideas by Bobby Fischer. The Exchange Variation can be a powerful psychological weapon. Black is forced to play actively, which is psychologically difficult if all one needs is a draw. Lasker's famous win against Jose Raul Capablanca in the St. Petersburg 1914 chess tournament is an example of this. With a lead in the tournament, Capablanca was intent on simplifying the game to obtain a draw, but faced with the Exchange Ruy he played too passively and was routed by Lasker as a result. 4...dxc6 is the main recapture. Black's
Ruy Blas and the Blasé Roué and Don Caesar are introduced to the royal palace in the capacity of strolling players. Don Salluste, a corrupt court official, has private reasons to wish to humiliate the Queen, and he persuades Ruy and Caesar to disguise themselves as women and apply for posts in the royal household. They are accepted, and Salluste then accuses the Queen of smuggling men into her private apartments, disguised as women. Ruy and Caesar are arrested and jailed. Ruy and Caesar find that their imprisonment is extraordinarily luxurious, but despite its attractions they escape, with the connivance of the Queen. Ruy and Caesar