[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1968.??.??"]
[Round "11"]
[White "Portisch, Lajos"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E81"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 a6 7.Qd2 c6 8.O-O-O b5
9.Bh6 Qa5 10.Bxg7 Kxg7 11.e5 dxe5 12.dxe5 Ng8 13.a3 Be6 14.Ne4 Qxd2+ 15.Rxd2 Nd7
16.Ng5 Nxe5 17.Nxe6+ fxe6 18.Nh3 h6 19.f4 Ng4 20.Be2 Ne3 21.g3 bxc4 22.Bf3 Rab8
23.Re2 Rb3 24.Bxc6 c3 25.bxc3 Nc4 26.Kc2 Rb6 27.Bf3 Nxa3+ 28.Kd3 Rc8 29.Rc1 Nf6
30.Ng1 Nc4 31.Ra2 e5 32.Re1 e4+ 33.Rxe4 Nxe4 34.Bxe4 Rb2 35.Rxb2 Nxb2+ 36.Kc2 Na4
37.Ne2 a5 38.Bd5 Kf6 39.Bb3 Nc5 40.Ba2 e5  0-1

