[Event "Petropolis Interzonal"]
[Site "Petropolis"]
[Date "1973.??.??"]
[Round "12"]
[White "Tan Lian Ann"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[WhiteElo "2365"]
[BlackElo "2645"]
[ECO "B53"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Nc6 5.Bb5 Qd7 6.Bxc6 bxc6 7.O-O e5 8.Qd3 Be7
9.c4 Ba6 10.Rd1 Nf6 11.Bg5 Rd8 12.Nbd2 O-O 13.b4 h6 14.Bxf6 Bxf6 15.a4 Bb7
16.b5 Qc7 17.Nf1 d5 18.Ne3 dxe4 19.Qxe4 cxb5 20.Nd5 Bxd5 21.cxd5 Qc4 22.Qxc4 bxc4
23.Rac1 e4 24.Nd2 Rxd5 25.Nxe4 Rxd1+ 26.Rxd1 Bb2 27.Rd2 c3 28.Rc2 Rc8 29.Kf1 Rc4
30.f3 f5 31.Nf2 Rxa4 32.Nd1 Ba1 33.Rc1 Ra3 34.Rc2 Kf7 35.Ke2 Ke6 36.Kd3 g6
37.Kc4 Ra4+ 38.Kb3 Rd4 39.Re2+ Kd6 40.Ne3 Rd3 41.Nc4+ Kc5 42.Ra2 Rd1 43.Rxa7 Rb1+
44.Kc2 Rg1 45.Kb3 f4 46.Ra2 Kd4 47.Ra7 Rb1+ 48.Kc2 Rb4 49.Na5 Rb2+ 50.Kc1 Rxg2
51.Nb3+ Kd3 52.Rd7+ Ke2 53.Nd4+ Kf2 54.h4 Bb2+ 55.Kb1 Rg1+  0-1

