1. d4 d5 2. c4 dxc4 3. e4 c5 4. d5 b5 - Queen's Gambit Accepted: Central Variation, Rubinstein Defense, Yefimov Gambit

Queen’s Gambit Accepted: Central Variation, Rubinstein Defense, Yefimov Gambit

Coups: 1. d4 d5 2. c4 dxc4 3. e4 c5 4. d5 b5