1. e2e4  1... e7e6  2. d2d4  2... d7d5  3. b1c3  3... g8f6  4. e4e5  4... f6d7  5. f2f4  5... c7c5  6. g1f3  6... b8c6  7. c1e3  7... f8e7  8. d1d2  8... a7a6  9. f1d3 Provoking Black's next queenside expansion. 9... b7b5 