[Event "Petropolis Interzonal"]
[Site "Petropolis"]
[Date "1973.??.??"]
[Round "13"]
[White "Polugaevsky, Lev"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[WhiteElo "2640"]
[BlackElo "2535"]
[ECO "D38"]

1.c4 Nf6 2.Nc3 e6 3.Nf3 d5 4.d4 Bb4 5.Qa4+ Nc6 6.cxd5 exd5 7.Bg5 h6 8.Bxf6 Qxf6
9.e3 O-O 10.Be2 Rd8 11.O-O a6 12.Rac1 Be6 13.Ne5 Bxc3 14.Nxc6 Bd7 15.Rxc3 Bxc6
16.Qa5 Qd6 17.Rfc1 Rd7 18.Qa3 Qf6 19.b4 Qd8 20.Qb3 Bb5 21.Bf1 Bxf1 22.Kxf1 c6
23.a4 Rd6 24.Rc5 Qh4 25.Kg1 Rg6 26.g3 Qe4 27.Qc2 Qf3 28.Qd1 Qe4 29.b5 axb5
30.axb5 Ra2 31.bxc6 Rf6 32.R1c2 Rxc2 33.Qxc2 Qxc2 34.Rxc2 bxc6 35.Ra2 g5
36.g4 Kg7 37.Ra7 Kg6 38.Ra8 Re6 39.Kg2 Kg7 40.Kg3 Kg6 41.h4 Kg7 42.h5 Kf6
43.Rg8 Re7 44.Kg2 Re6 45.Kg3 Re7 46.Kf3 Re4 47.Rc8 Re6 48.Ke2 Kg7 49.f3 Kh7
50.Ra8 Kg7 51.Ra1 Kg8 52.Kd3 Rf6 53.Rf1 Kg7 54.Rf2 Kf8 55.f4 gxf4 56.exf4 Kg7
57.f5 Rd6 58.Ke3 Kf6 59.Kf4 Rd8 60.Rc2 Rc8 61.g5+ hxg5+ 62.Kg4 Kg7 63.Kxg5 f6+
64.Kh4 Kh7 65.Re2 c5  1/2-1/2

