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1.d4 Nf6 2.Nf3 e6 3.Bg5 c5 4.e3 b6 5.d5 · ECO A46
Torre Attack: Classical Defense, Petrosian Gambit is a chess opening that arises after 1.d4 Nf6 2.Nf3 e6 3.Bg5 c5 4.e3 b6 5.d5. It is classified A46 in the ECO system, and the position after these moves has black to move.
This line is a variation within the Torre Attack family. The strategic ideas above describe the family as a whole; this particular line reaches them by the move order 1.d4 Nf6 2.Nf3 e6 3.Bg5 c5 4.e3 b6 5.d5.