[Event "US op"]
[Site "Chicago"]
[Date "1989.??.??"]
[Round "4"]
[White "Ivanov, Igor V"]
[Black "Allan, Denis"]
[Result "1-0"]
[WhiteElo "2515"]
[BlackElo "2285"]
[ECO "A60"]

1.c4 Nf6 2.Nf3 e6 3.d4 c5 4.d5 exd5 5.cxd5 Bd6 6.Nc3 Bc7 7.e4 d6 8.Be2 O-O
9.Bg5 Re8 10.O-O Nbd7 11.Nd2 a6 12.a4 Nf8 13.f4 h6 14.Bh4 Ng6 15.Bg3 Ba5
16.Bf3 Rb8 17.Qc2 b5 18.axb5 axb5 19.Kh1 c4 20.Rfe1 Bg4 21.b3 Bxf3 22.gxf3 Nh5
23.bxc4 Bxc3 24.Qxc3 Ngxf4 25.Bxf4 Nxf4 26.Rg1 Re5 27.Rg4 Qf6 28.Rag1 Ne2
29.Rxg7+ Kh8 30.Qb2 Nxg1 31.Rxg1 b4 32.c5 dxc5 33.f4 Rf5 34.e5 Qe7 35.Ne4 Rxf4
36.e6+ f6 37.Qd2 Rh4 38.Qe1 Rxe4 39.Qxe4 Rg8 40.Rxg8+ Kxg8 41.Qg6+ Qg7 42.Qe8+ Qf8
43.Qd7 Qa8 44.Qf7+ Kh8 45.Qxf6+ Kh7 46.Qf7+  1-0

