1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... b8d7  5. c4d5  5... e6d5  6. c1g5  6... c7c6 A classic Carlsbad structure is reached. 7. e2e3  7... f8e7  8. f1d3  8... h7h6  9. g5h4 