Queen's Gambit Declined: Vienna

The Vienna variation of the Queen's Gambit Declined is a complex and fascinating system arising after 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 Bb4 5 Bg5 dxc4. This counterattacking weapon has become increasingly popular over the last decade and is frequently seen in games played at the highest level.