Trompowsky Attack: Classical Defense, Big Center Variation

An entry in the Encyclopedia of Chess Openings (ECO A45), reached after 5 half-moves: 1. d4 Nf6 2. Bg5 e6 3. 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

Trompowsky Attack: Classical Defense, Big Center Variation is an opening in the Encyclopedia of Chess Openings, classified under code A45. ECO group A (A00–A99) covers flank and irregular openings, including the English, Bird, Réti and Dutch defences. This particular variation is reached after 5 half-moves from the starting position, with the move sequence 1. d4 Nf6 2. Bg5 e6 3. e4.

It belongs to the Trompowsky Attack family. Within that family this is a level-2 branch (the Classical Defense → Big Center Variation line). The immediate parent line is Trompowsky Attack: Classical Defense, transitioned via 3.e4.

The opening sequence in prose form: 1.d4 Nf6, 2.Bg5 e6, 3.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.