Modern Defense: Averbakh System

An entry in the Encyclopedia of Chess Openings (ECO A42), reached after 7 half-moves: 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4.

Black rook — Use ← → arrows or click moves to step through.

Black knight — Use ← → arrows or click moves to step through.

End of this line

No further variations branch from this position in our database. To explore neighbouring ideas:

About this opening

Modern Defense: Averbakh System is an opening in the Encyclopedia of Chess Openings, classified under code A42. ECO group A (A00–A99) covers flank and irregular openings, including the English, Bird, Réti and Dutch defences. This particular variation is reached after 7 half-moves from the starting position, with the move sequence 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4.

It belongs to the Modern Defense family. Within that family this is a sub-variation (the Averbakh System line).

The opening sequence in prose form: 1.d4 g6, 2.c4 Bg7, 3.Nc3 d6, 4.e4. From this position the encyclopaedia records no further canonical continuations — practical play branches into unnamed transpositions or returns to the parent line for alternative ideas.