1. Main line 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Choose a line 1. Main line 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 2. Taimanov Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Nc6 Close 1. Main line 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 2. Taimanov Variation 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Nc6 Next