[Event "Siegen olm"]
[Site "Siegen"]
[Date "1970.??.??"]
[Round "5"]
[White "Larsen, Bent"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "A01"]

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

