[Event "Siegen ol (Men) qual-D"]
[Site "Siegen FRG"]
[Date "1970.09.09"]
[EventDate "?"]
[Round "5"]
[Result "0-1"]
[White "Bent Larsen"]
[Black "Lajos Portisch"]
[ECO "A01"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "44"]

1.b3 e5 2.Bb2 Nc6 3.c4 Nf6 4.e3 d6 5.Nc3 g6 6.Nf3 Bg7 7.d4 Bf5
8.d5 Nb4 9.Rc1 a5 10.a3 Na6 11.h3 O-O 12.g4 Bd7 13.g5 Nh5
14.Ne4 f5 15.gxf6 Nxf6 16.Nfd2 Nxe4 17.Nxe4 Qh4 18.Ng3 Nc5
19.Bc3 Rxf2 20.Kxf2 Ne4+ 21.Kg1 Qxg3+ 22.Bg2 Qxe3+ 0-1