Best response to the Alekhine Defense (B03)

1. e4 Nf6 2. e5 Nd5 3. d4 · Black to move

What is the best response to the Alekhine Defense (1. e4 Nf6 2. e5 Nd5 3. d4)? Black to move. See the top replies ranked by opening theory and real-game results, starting with b5.

The main theoretical reply is b5, reaching the Alekhine Defense: O'Sullivan Gambit.

Ranked replies for Black