C72White11 book lines continue
Morphy Defense, Modern Steinitz Defense
Ruy Lopez1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. O-O
Also known as Spanish: Modern Steinitz, 5.O-O, Ruy Lopez: Morphy Defense, Modern Steinitz Defense, 4. Ba4 d6 5. O-O, Spanish Game, Morphy Defense.