Chess opening are so complex and theoretical that amateur players will have trouble understanding them. An example is the Perenyi Attack of the Sicilian Defense (see diagram) which yields an immensely complicated and tactical position that even strong players have difficulty handling, and that is beyond the comprehension of most amateurs. Major changes in the rules of chess in the late fifteenth century increased the speed of the game, consequently emphasizing the importance of opening study. Thus, early chess books, such as the 1497 text of Luis Ramirez de Lucena, present opening analysis, as does Pedro Damiano (1512), and Ruy López de
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