C74White25 book lines continue
Morphy Defense, Modern Steinitz Defense
Ruy Lopez1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3
Also known as Spanish: Modern Steinitz, 5.c3, Ruy Lopez: Morphy Defense, Modern Steinitz Defense, 4. Ba4 d6 5. c3, Spanish Game, Morphy Defense.