[Event "Hoogovens"]
[Site "Beverwijk NED"]
[Date "1964.01.23"]
[EventDate "1964.01.08"]
[Round "13"]
[Result "1/2-1/2"]
[White "Jan Hein Donner"]
[Black "Borislav Ivkov"]
[ECO "A57"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "59"]

1.d4 Nf6 2.c4 c5 3.d5 d6 4.Nc3 g6 5.e4 Bg7 6.Be2 O-O 7.Nf3 e5
8.O-O Ng4 9.Ng5 Nf6 10.f4 exf4 11.Bxf4 Ne8 12.Qd2 Nd7 13.Rae1
Qe7 14.Nd1 a6 15.b3 Nc7 16.Nf2 Ne5 17.Nf3 b5 18.Nxe5 Bxe5
19.Bg4 Ne8 20.Bxc8 Rxc8 21.Nd3 Bd4+ 22.Kh1 bxc4 23.bxc4 f6
24.Nb4 cxb4 25.Qxd4 Rf7 26.Bd2 a5 27.a3 Qa7 28.Qd3 Qa6 29.axb4
axb4 30.Bxb4 1/2-1/2