[Event "Hoogovens"]
[Site "Wijk aan Zee NED"]
[Date "1971.01.15"]
[EventDate "1971.01.12"]
[Round "4"]
[Result "1/2-1/2"]
[White "Borislav Ivkov"]
[Black "Fridrik Olafsson"]
[ECO "A22"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "39"]

1.c4 e5 2.Nc3 Nf6 3.g3 Bb4 4.Bg2 O-O 5.e4 Bxc3 6.bxc3 c6 7.Ne2
d5 8.cxd5 cxd5 9.exd5 Nxd5 10.O-O Nc6 11.Rb1 Nb6 12.d4 Be6
13.Qd2 Bd5 14.dxe5 Nxe5 15.Bxd5 Nxd5 16.Kh1 Qa5 17.c4 Qxd2
18.Bxd2 Nxc4 19.Rxb7 Rfe8 20.Be3 1/2-1/2