1. d2d4  1... g8f6  2. g1f3  2... d7d5  3. c1f4  3... c7c5  4. e2e3  4... b8c6  5. b1d2  5... c5d4  6. e3d4  6... d8b6  7. d2b3  7... c8g4  8. a2a4  8... a7a6 A novelty, which prevents the white a-pawn from  going too far. 9. a4a5  9... b6a7  10. c2c3 