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  8. a1c1  8... g7g6  9. f1d3 