[Event "IBM"]
[Site "Amsterdam"]
[Date "1971.??.??"]
[Round "3"]
[White "Langeweg, Kick"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[WhiteElo "2425"]
[BlackElo "2560"]
[ECO "A48"]

1.Nf3 g6 2.d4 Bg7 3.c3 Nf6 4.Bf4 b6 5.e3 Bb7 6.Nbd2 d6 7.Be2 O-O 8.h3 Nbd7
9.O-O Re8 10.a4 a6 11.Bh2 e5 12.a5 b5 13.c4 exd4 14.Nxd4 bxc4 15.Bxc4 d5
16.Bb3 c5 17.N4f3 Qe7 18.Ba4 Rec8 19.Qb3 Nb8 20.Rac1 Bc6 21.Ne5 c4 22.Nxc6 Nxc6
23.Qb6 Nd7 24.Qxc6 Rxc6 25.Bxc6 Rd8 26.Bxd5 Nc5 27.e4 Bh6 28.Rc2 Bxd2 29.Rxd2 Nxe4
30.Re1 Qb4 31.Rdd1 Rxd5  0-1

