1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... c7c6  5. c1g5  5... h7h6  6. g5f6 A solid choice. 6.Bh4 is the most aggressive option and leads to chaotic positions if Black accepts the pawn with 6...dxc4. 6... d8f6  7. e2e3  7... b8d7 