Chess of the position. Weaknesses in the pawn structure, such as isolated, doubled, or backward pawns and , once created, are often permanent. Care must therefore be taken to avoid these weaknesses unless they are compensated by another valuable asset (for example, by the possibility of developing an attack). A chess opening is the group of initial moves of a game (the "opening moves"). Recognized sequences of opening moves are referred to as "openings" and have been given names such as the Ruy Lopez or Sicilian Defense. They are catalogued in reference works such as the "Encyclopaedia of Chess Openings". There
Roderigo Lopez Shylock, a Venetian Jewish moneylender who hates Christians. The Lopez case prompted a revival of Christopher Marlowe's play "The Jew of Malta" (c. 1589–90), which according to Elizabeth Lane Furdell began rehearsals in London the same day Lopez was taken to Essex House. In Marlowe's "Doctor Faustus" (c. 1592), there is a mention of Lopez—probably added after Marlowe's death in 1593—comparing him to the title character. It reads: "Doctor Lopus was never such a doctor!" Roderigo Lopez Roderigo Lopez (also called Ruy Lopes, Ruy Lopez or Roger Lopez; c. 1517 – 7 June 1594) served as physician-in-chief to Queen Elizabeth