C69Black23 book lines continue
Exchange Variation, Gligoric Variation
Ruy Lopez1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O f6
Also known as Spanish: Exchange, Gligoric Variation, Spanish Game, Exchange Variation, Gligoric Variation, Ruy Lopez; C69.