Related Openings
QGD - 4.Bg5 Be7, 5.e3 O-O	d4, d5, c4, e6, Nc3, Nf6, Bg5, Be7, e3, O-O
QGD - 4.Bg5 Be7	d4, d5, c4, e6, Nc3, Nf6, Bg5, Be7