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
Brave (Jennifer Lopez album) hop world. Lopez stated, "My Spanish album was kind of an opportunity to get away from what I do on my English [albums], to kind of express a different side of myself. This [next] album is more of what people and my fans are used to — you know, just kind of a dance, funk, R&B, hip-hop, all that stuff, all mixed up together to make some great pop music. Basically it's just danceable music," she said. While on early stages, it was announced that Lopez was working once again with music producer Cory Rooney, who worked on most of