Modern Defense: Averbakh System

1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4

ECO A42

The Modern Defense: Averbakh System is a chess opening line in the Modern Defense complex, reached after 1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4.

It is catalogued under code A42 in the Encyclopaedia of Chess Openings (ECO).

The defining move e4 is chosen by White on move 4.

Study this line with a grandmaster

This position is covered in the Modern Defense 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.