Inexplicable. Clearly better was 10...Qxd4 11.Qe2 Nd5 12.Nxd5 Qxe5 13.Qxe5 Bxe5 14.Nf6+ Bxf6 15.Bxf6 Rg8 16.Rxh5 a6 (16...Rxg2 17.Rxh7 Rg1+ 18.Bf1+/=) 17.Rxh7 Nd7 =/+11.Nxc6+- bxc6 12.Qf3
12...Qxd4 gets complicated quickly, e.g., 13.Qxc6+ Nd7 14.Qxa8 Qe5+ 15.Be2 Qxg5 16.Qxc8+ Ke7 17.Qc6 Qg3+ 18.Kf1+-13.0-0-0 Rb8 14.Bb3 c5?
Not good, but I can't find a move here to prevent the loss of a piece.15.Ne4 Bb7 16.Nxf6+ Bxf6 17.Qxf6 Qxf6 18.Bxf6 Rg8 19.Ba4+ Kf8
Okay, but 20.Rxh5 is better 20...Bd5 (20...Bxg2 21.Rxc5) 21.Rxh7 Rb4+- with 22.Rdh1!? or 22.b3.20...Rc8 21.Bd6+ Kg7 22.Rxh5 Be4 23.Bxc5 Kg6 24.Rdh1 Bxg2 25.Rh6+ Kf5 26.R1h5+ Ke4
26...Rg5 27.Be7 Rxh5 28.Rxh5+ Kf4 29.Rxh7+-27.Bb5
27.Rh4+ Kd5 28.Bxd4 Be4 29.c3+-27...e5 28.Bd3+ Kd5 29.b4
29...Rg6 30.Rxh7 Rf6 31.Rg5 and Rhh5+-30.Rd6# 1-0