1. Main line 1. d4 Nf6 2. c4 e6 3. Qb3 Choose a line 1. Main line 1. d4 Nf6 2. c4 e6 3. Qb3 2. Devin Gambit 1. d4 Nf6 2. c4 e6 3. g4 3. Seirawan Attack 1. d4 Nf6 2. c4 e6 3. Bg5 Close 1. Main line 1. d4 Nf6 2. c4 e6 3. Qb3 2. Devin Gambit 1. d4 Nf6 2. c4 e6 3. g4 3. Seirawan Attack 1. d4 Nf6 2. c4 e6 3. Bg5 Next