[Event "Amsterdam IBM"]
[Site "Amsterdam NED"]
[Date "1971.07.31"]
[EventDate "1971.07.13"]
[Round "15"]
[Result "0-1"]
[White "Lajos Portisch"]
[Black "Andras Adorjan"]
[ECO "D97"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "118"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4
a6 8.Qb3 b5 9.e5 Nfd7 10.e6 fxe6 11.Qxe6+ Kh8 12.Qe4 Nb6
13.Be2 Bf5 14.Qh4 Nc6 15.Bh6 e5 16.Ng5 Bxh6 17.Qxh6 Qe7
18.dxe5 Nd4 19.Rd1 c5 20.Rd2 b4 21.Nd1 Nd5 22.Bc4 Nf4 23.Nf7+
Rxf7 24.Qxf4 Be6 25.Qe4 Raf8 26.Ne3 Rf4 27.Qd3 Bxc4 28.Nxc4
Qg5 29.Qg3 Rg4 30.Qe3 Rxg2 31.Qxg5 Rxg5 32.Kd1 Rg2 33.Re1 Kg7
34.Nd6 Nf3 35.e6 Nxe1 36.e7 Nf3 37.exf8=Q+ Kxf8 38.Rd3 Rg1+
39.Ke2 Nd4+ 40.Kd2 Rb1 41.Nc4 Rf1 42.Ke3 Ke7 43.Nd2 Re1+
44.Kf4 Re2 45.Kg3 Kd6 46.Kg2 Kd5 47.Kf1 Re7 48.b3 Kc6 49.Nc4
Re6 50.h3 h6 51.Rd2 Kd5 52.Ne3+ Kc6 53.Nc4 Kb5 54.Nb2 a5
55.Na4 Re5 56.Rd3 Re4 57.Re3 Rxe3 58.fxe3 Nxb3 59.axb3 c4 0-1