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
Ruy López de Dávalos no issue. 1.5 Giovanni de Guevara, Juan de Guevara, Secreto of Malta island and Gozo island. In 1460, married Paola Inguanez, Paula Iñiguez????, de los barones malteses de Djar il-Biniet, dei Baroni di Djar il-Bniet., with issue. Guara, Daguara, etc. are Italian approaches in the manuscripts to try to spell the Basque-Spanish name Guevara. Ruy López de Dávalos Ruy López de Dávalos, a.k.a. Rui López Dávalos, (Úbeda, Jaén Province, Spain, 1357 - in exile, Valencia, Spain, 1428), Count of Ribadeo since it was sold by the first count, the Frenchman Pierre de Villaines, who received it from Henry II of