1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 dxc4 5.Bg5 Bb4 6.a3 [6.e4 c5 , going into the main line Vienna, is far more common.]
6...Bxc3+ 7.bxc3 h6 8.Bxf6 Qxf6 9.e3 b5N [9...0-0 10.Bxc4 b6 11.0-0 Bb7 12.Ne5 Qg5 13.Qg4 Qxg4 14.Nxg4 Nc6 15.h4 h5 16.Nh2 Na5 17.Be2 g6 18.Nf3 c5 19.dxc5 Nb3 20.Rad1 Nxc5 21.Ne5 Rfd8 22.Rd4 Rd5 23.f4 Rc8 24.Bf3 Rxd4 25.exd4 Bxf3 26.dxc5 Bc6 27.cxb6 axb6 28.Rb1 Bd5 29.c4 Bxc4 30.Rxb6 Bd5 31.Rd6 Ra8 32.Kf2 Rxa3 33.Rd8+ Kg7 34.Rd7 Ra2+ 35.Ke3 Rxg2 36.Rxf7+ Kg8 37.Rd7 Kf8 38.Rc7 Ba2 39.Kf3 Rg1 0-1 Figueiredo,F (2276)-Derouineau,J (2368)/ICCF email 2001]
10.a4 c6 Returning to (obscure) past praxis.
11.Ne5 a6 12.g4N Bb7 13.Bg2 Qe7 14.0-0 0-0 15.f4= White's compensation is sufficient, but not more.
15...Nd7!? 16.Nxc6 Qd6 17.Ne7+ Qxe7 18.Bxb7 Ra7 19.Bg2 Nb6 20.axb5 axb5 21.Rxa7 [21.Qd2 Ra3 ]
21...Qxa7 22.Qa1 Qe7! Black is threatening to take over the initiative here, with jumps like ...Nd5, ...Na4, ...Qh4 and ...Qa3 (if White's queen goes to e1 to stop ...Qh4) in the air.
23.e4 Ra8 [23...Rb8 might improve, going for ...b4.]
24.Qb2 Ra5 25.e5 Qh4 [25...Na4 almost gives Black an advantage, but White has a neat tactical defense. 26.Qc2 Qa3 27.Rc1 Nb2 28.Rb1 Nd3 29.Bf1! Nxf4 30.Bxc4!= ]
26.Qe2 [26.f5! Qe7 27.f6 Qa3 28.Qf2 Qf8 29.Rb1+/= (29.fxg7 Qxg7+/= ) ]
26...Ra3 [26...h5!? ]
27.f5! Without this counter-attack, White and his overextended structure would be lost.
27...Rxc3 28.fxe6 fxe6 29.Qe4! Qd8 30.Qg6 Now Black must be quick, as White threatens to win immediately with 31.Be4.
30...Qxd4+ 31.Kh1 Re3 32.Qxe6+ Kh7 33.Qf5+ Kh8 34.Qf8+ [34.Qg6 Nd7 35.g5 hxg5 (35...Qd3 36.Qe8+ Kh7 37.g6+ Qxg6 38.Qxd7 Rxe5 39.Rg1 Rg5 40.Qd4 Rg4 41.Qc5 Rg5= ) 36.Qh5+ Kg8 37.Qf7+ Kh7 38.Bd5 Kh6! 39.Qxd7 Qxe5= ]
34...Kh7 35.Qf5+ Kh8 36.Qf8+ 1/2-1/2