Ke7 12.Be3 Nd7 (12....Nc6) 13.Nxd7 Bxd7
(13...Kxd7)14.Bxa7 Rc815.Bb6 Kf6 16.O-O-O
FIG. 19
12...Kd6 is best met by 13.Nb5+ Kxe5 14.Bd4+
according to Nesis
After 9.Nb5 Rb8 comes 10 Nxe5 e6 11.Nxc7+(11.Nxa7) Ke7
12.Be3 b6 13. Rd1 Bb7 14.Bg5(14....Bc6 is probably best
for black) 14... Bd5 15.Bxd5 ed 16.Rxd5
FIG. 20
White threathens mate.