Sicilian Defense

The Sicilian Defense is a chess move by black pieces of Queen's bishop's pawn forward by two spaces ("c5"), typically in response to a white opening of "e4" (King's pawn moved forward by two spaces).

The Sicilian Defense is so successful that its lowers the "e4" opening by white to a rank of #2 behind "d4" in terms of the most successful white openings.

Be careful in using the Sicilian Defense to protect against a quick attack by the whites pieces. As a bit of a flanking maneuver, the Sicilian Defense is an aggressive long-term strategy which has some short-term vulnerabilities.