Best response to the Ruy Lopez: Classical Variation (C64)

1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 · White to move

What is the best response to the Ruy Lopez: Classical Variation (1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5)? White to move. See the top replies ranked by opening theory and real-game results, starting with b4.

The main theoretical reply is b4, reaching the Ruy Lopez: Classical Variation, Spanish Wing Gambit.