1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. g2g3  4... f8b4  5. c1d2  5... b4e7  6. f1g2  6... c7c6  7. d1c2  7... b7b6  8. e1g1  8... b8d7 Black decides to postpone castling and this can lead to original play. 9. b1c3 This pawn sacrifice is not considered dangerous in the normal lines with 8. ..0-0. 9... c8a6  10. c4d5  10... c6d5 