sicilian defence
Sicilian Defense The Sicilian Defense is the most popular defense against whiteâs opening 1.e4 and is used extensively at top level play. It is a very aggressive defense and immediately stakes claim at the center, denying white the double pawns on e4 and d4. Many chess champions actually prefer to start with 1.d4 because of how well the Sicilian Defense plays against 1.e4.