Chess Opening Theory/1. d4/1...d5/2. c4/2...c6/3. Nc3/3...dxc4/4.e3/4...b5/5.Nxb5/5...cxb5/6.Qf3/6...Qc7/7.Qxa8/7...Bb7/8.Qxa7/8...e6
After this, Bb4+ is threatened and the queen is trapped on a7. Nc6, winning the queen, is also threatened. The only way to avoid loss of the queen is Bxc4 or, but after Bb4+ Bd2 Bxd2+ Kxd2 Bxc4, Black has two minor pieces for a rook and an attack, and he is close to winning. White's king will never leave the center, and it will be an inviting target for the rest of the game. However, e5 is better, as now d5 Bc5 d6 Bxd6 Qd4 an interesting try. If e5, Qd4 is impossible and the queen is trapped.