[Event "?"]
[Site "Siegen (Germany)"]
[Date "1970.??.??"]
[Round "?"]
[White "Portisch Lajos (HUN)"]
[Black "Andersson Ulf (SWE)"]
[Result "1/2-1/2"]
[ECO "E92/02"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 
5.Be2 O-O 6.Nf3 e5 7.Be3 Nc6 8.d5 Ne7 
9.Nd2 c5 10.g4 Ne8 11.g5 Bh3 12.Rg1 a6 
13.a4 Rb8 14.Bg4 Bxg4 15.Qxg4 b6 16.Rb1 Kh8 
17.Ke2 f5 18.gxf6 Nxf6 19.Qh3 Nh5 20.Nf3 Ng8 
21.Ng5 Qf6 22.Ne6 Rf7 23.Kd2 Bh6 24.Rbf1 Nf4 
25.Bxf4 Bxf4+ 26.Kd3 Ne7 27.Kc2 Ng8 28.Rg4 Bh6 
29.Rg2 Rbb7 30.Qg3 Qe7 31.Qh3 Rf6 32.Rfg1 Qe8 
33.Qd3  1/2-1/2