After 9.Nb5 Rb8 comes 10 Nxe5 e6 11.Nxa7 (11.Nc7+) Bb4+(11...Bc5 12.Be3) 12.Bd2 Bxd2+ 13.Kxd2 O-O 14.Rhc1! FIG. 11 Black has a miserable ending. For those of you who hate endings you could opt instead to attack 11 by 11.Nc7+ Ke7 12.Be3