1. Main line 1. d4 Nf6 2. c4 c5 Choose a line 1. Main line 1. d4 Nf6 2. c4 c5 2. Czech Benoni Defense 1. d4 Nf6 2. c4 c5 3. d5 e5 3. Hromádka System 1. d4 Nf6 2. c4 c5 3. d5 d6 4. King's Indian System 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6 5. Weenink Variation 1. d4 Nf6 2. c4 c5 3. dxc5 e6 Close 1. Main line 1. d4 Nf6 2. c4 c5 2. Czech Benoni Defense 1. d4 Nf6 2. c4 c5 3. d5 e5 3. Hromádka System 1. d4 Nf6 2. c4 c5 3. d5 d6 4. King's Indian System 1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6 5. Weenink Variation 1. d4 Nf6 2. c4 c5 3. dxc5 e6 Next