[Event "15th olm qual. group 4"]
[Site "Varna BUL"]
[Date "1962.09.20"]
[Round "3"]
[White "Koelvig, Bent DEN"]
[Black "Portisch, Lajos HUN"]
[Result "0-1"]
[ECO "B43"]
[EventDate "1962.09.16"]
[PlyCount "72"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.Be3 Bb4 7.Qd3 Nf6 8.Bd2 
Nc6 9.Nxc6 bxc6 10.a3 Be7 11.Be2 d5 12.O-O O-O 13.Rfe1 dxe4 14.Nxe4 Rd8 
15.Nxf6+ Bxf6 16.Qe3 Bxb2 17.Rad1 Bd4 18.Qg5 Bf6 19.Qc5 Rd5 20.Qc4 a5 21.
Bf3 Ba6 22.Qf4 Qxf4 23.Bxf4 Rc5 24.Be3 Rxc2 25.Rc1 Rxc1 26.Rxc1 Rc8 27.
Rxc6 Rxc6 28.Bxc6 Bc3 29.f4 f6 30.Kf2 Kf7 31.Bc5 Bc4 32.Ke3 e5 33.g4 exf4+
34.Kxf4 Be5+ 35.Kf3 Bxh2 36.Bb6 Bd6 0-1

