Sicilian Defense: Closed, Korchnoi Defense

1.e4 c5 2.Nc3 e6 3.g3 d5

ECO B23

The Sicilian Defense: Closed, Korchnoi Defense is a chess opening line in the Sicilian Defense complex, reached after 1.e4 c5 2.Nc3 e6 3.g3 d5.

It is catalogued under code B23 in the Encyclopaedia of Chess Openings (ECO).

The defining move d5 is chosen by Black on move 3.

Do you want to learn openings?

Start with a GM-authored repertoire you study move by move, then practice against a human-like AI opponent:

• Catalan Opening
• King's Indian Defense with ...e5

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