D06White1 book lines continue
Austrian Defense, Gusev Countergambit
Queen's Gambit Declined1. d4 d5 2. c4 c5 3. cxd5 Nf6 4. e4 Nxe4 5. dxc5
Also known as QGD: Austrian, Rubinstein Variation, Queen's Gambit Refused: Austrian Defense, Gusev Countergambit.