C73White1 book lines continue
Morphy Defense, Modern Steinitz Defense
Ruy Lopez1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4
Also known as Spanish: Modern Steinitz, Richter Variation, Ruy Lopez: Morphy Defense, Modern Steinitz Defense, 5. Bxc6+ bxc6 6. d4, Spanish Game, Morphy Defense.