Ruy López de Segura Ruy López de Segura Rodrigo (Ruy) López de Segura (c. 1530 – c. 1580) was a Spanish priest and later bishop in Segura whose 1561 book "Libro de la invención liberal y arte del juego del Axedrez" was one of the first definitive books about modern chess in Europe, preceded only by Pedro Damiano's 1512 book, Luis Ramírez de Lucena's 1497 book (the oldest surviving printed book on chess), and the Göttingen manuscript (authorship and exact date of the manuscript are unknown). He was born in Zafra near Badajoz, and he studied and lived in Salamanca. In 1560 he won
Ruy Lopez so it is difficult for White to exploit his structural superiority without opening the game for Black's bishops; all four of the games in the Kasparov–Kramnik match in which this line was employed ended in draws. An alternative for Black, though seldom seen since the 1890s, is 6...bxc6 7.dxe5 Nb7, although White keeps an advantage despite Black's two bishops, as it is difficult for him to gain active counterplay. White's move 4.Nc3 transposes to the Four Knights Game, Spanish Variation. Another possible try for White is 4.d3. This is "Steinitz's move, with which he scored many spectacular successes during his