wwall: 10.Neg5 may be more common.
Instead of 11.Bxb4, White has played 11.Nxd4 Nxd4 12.c3 Qd5 13.cxb4 O-O 14.Rc1 Rad8 15.Rc5 Qxa2 16.Bc3 Nb5 17.Nf6+ gxf6 18.Bxf6 Rd5 19.Qd2 1-0, Kinzel-Duckstein, Vienna 1958.
If 15...Qxb2, then 16.Nc5 Rf7 17.Rb1 Qxa2 18.Qg4+ Kb8 19.Nxb7 Ka8 20.Na5 Qxc2 21.Nxc6 Qxc6 22.Qxd4 Rhf8 23.Rec1 Qg6 24.Rb2 and perhaps a draw.
Or 16.b3 Rde7 17.Qg4 Kb8 18.Re4 Nd8, now 19.Rae1?? Rxe6 20.Rxe6 Qxe1+ 21.Rxe1 mate. White can try 19.Ng5 Qc3 20.Rf1 Rxe4 21.Nxe4 Qxc2. Or White can try 19.Rxd4 Qc3 20.Rad1 Nxe6 21 Rc4 (21.Qxe6 looks bad after 21...Qxd4 22.Rxd4 Rxe6) 21...Nd8 22.g3 Qf6.
Another idea is 16.Qd3 Nd8 17.Qf5 Qe7 18.Qa5 Nxe6 19.Qxa7 c6 20.Qa8+ Kc7 21.Qa5+ Kb8, and unclear to me.
Instead of 17.Qxb4, perhaps 17.Re4 Qxb2 18.Rf1 (not 18.Rae1? d2 19.Red1 Qe5) 18...Ne5 (or 18...dxc2 19.Nc5 Red8 20.Rae1 Qd4 21.Qxd4 Rxd4 22.Ne6 Ra4 23.Nxd8 Nxd8 24.Ra1 Ne6) 19.Qf5 (or 19.Qh3 dxc2 20.Nc5 Red8 21.Ree1 g6) 19...g6 (or 19...dxc2 20.Nf8 Rxf8 21.Qxf8+ Rd8 22.Qf5+ Kb8 23.Qxe5 c1=Q 24.Rxc1 Qxc1+ 25.Re1 Qd2 may draw) 20.Qxe5 Qxe5 21.Rxe5 dxc2 22.Rc5 (22.Re2 Rde7 23.Rxc2 Rxe6) 22...Rxe6 23.Rxc2 b6 is unclear.
Another idea is 17.c4 Nd4 18.Rad1 Qe7 19.Rxd3 Nxe6 20.Rde3 Rd6. Can Black win this?
If 18.cxd3, then 18...Rde7 19.Re4 Nxd3 20.Nxg7 Rxe4 21.Nxe8 Rxe8 favors Black.
19...dxc2! wins. If 19...d2, then 20.Rd1 Re7 21.Kf1 Nxc2 22.Nd3 Ne1 23.Rxd2 Nxd3 24.Rxd3 should draw.
After 20...Nd3, if White playws 21.Ra1 or 21.Rf1, then 21...Kxd7 wins for Black.