Best response to the Sicilian Defense: O'Kelly Variation, Maróczy Bind (B28)

1. e4 c5 2. Nf3 a6 3. c4 · Black to move

What is the best response to the Sicilian Defense: O'Kelly Variation, Maróczy Bind (1. e4 c5 2. Nf3 a6 3. c4)? Black to move. See the top replies ranked by opening theory and real-game results, starting with d6.

The main theoretical reply is d6, reaching the Sicilian Defense: O'Kelly Variation, Maróczy Bind, Robatsch Line.