Sicilian Defense

1.e4 c5

ECO B20

The Sicilian Defense is a chess opening reached after 1.e4 c5, catalogued under code B20 in the Encyclopaedia of Chess Openings (ECO).

The defining move c5 is chosen by Black on move 1.

91 named continuations branch from this position, including the Amazon Attack and the Big Clamp Formation.

Named variations

Study this line with a grandmaster

This position is covered in the The Moscow Attack course: a GM-authored repertoire you study move by move, then practice against a human-like AI opponent.

Every chess term used here is defined in the chess terms glossary. Browse all opening courses or the full ECO code index.