Best response to the Vienna Game: Falkbeer Variation (C26)

1. e4 e5 2. Nc3 Nf6 · White to move

What is the best response to the Vienna Game: Falkbeer Variation (1. e4 e5 2. Nc3 Nf6)? White to move. See the top replies ranked by opening theory and real-game results, starting with a3.

The main theoretical reply is a3, reaching the Vienna Game: Mengarini Variation.