Apparently he was displeased by the result of the opening) 9.f4 Be6 10.0-0 Qd7 11.fxe5 (11.Ndf2) 11...Nxe5 12.Nf4 Bg4 13.Qe1 Ne7 14.h3 Be6 15.Qe2 0-0-0 16.Nf2 Bf7 17.h4 Kb8 18.Bh3 Qc6 19.Ne6 Bxe6 20.Bxe6 Bc7 21.Bb3 f5 22.Bf4 Rhe8 23.Rae1 N5g6 24.Bxc7+ Qxc7 25.Nh1 f4 26.h5 f3! 27.Qxf3 Ne5 28.Qf4 N7c6 29.Ba4 Re6 30.Bxc6 Rxc6 and even though White is a sound pawn up, Black is better here.