1. Main line 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Choose a line 1. Main line 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 2. Keres Defense 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 3. Vitolins-Adorjan Gambit 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b5 Close 1. Main line 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 2. Keres Defense 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 3. Vitolins-Adorjan Gambit 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b5 Next