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  9... f6e7  10. e1g1  10... f8g7  11. f1e1  11... e8g8  12. d1c2 