[Event "6th olw final B"]
[Site "Medellin COL"]
[Date "1974.09.30"]
[Round "8"]
[White "O'Siochru, Dorren IRL"]
[Black "Karff, Mona USA"]
[Result "0-1"]
[ECO "B99"]
[EventDate "1974.09.15"]
[PlyCount "132"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 
Nbd7 9.O-O-O Qc7 10.g4 b5 11.Bxf6 gxf6 12.a3 Bb7 13.Rg1 Nc5 14.Qe3 h6 15.
Nf3 Rc8 16.Bd3 Qa5 17.Na2 Qb6 18.Qe2 Na4 19.Nb4 Kf8 20.g5 hxg5 21.fxg5 
fxg5 22.Nxg5 Bf6 23.c3 Qc5 24.e5 Qxe5 25.Qxe5 Bxe5 26.Rgf1 f6 27.Nxe6+ Ke7
28.Ng7 Rxh2 29.Bc2 Nc5 30.Nf5+ Ke6 31.Nxd6 Rxc2+ 32.Nxc2 Nb3+ 33.Kb1 Bxd6 
34.Rfe1+ Kd7 35.Ka2 Nc5 36.Nd4 Kc7 37.Nf5 Be5 38.Rf1 Rh8 39.Ne3 Rd8 40.
Rxd8 Kxd8 41.Rg1 {Aplazada} 41...Kc7 42.Ng4 Bf3 43.Nxe5 fxe5 44.Re1 e4 45.
Kb1 Nd3 46.Re3 Nf4 47.Re1 Ng2 48.Rg1 e3 49.Kc1 e2 50.Kd2 e1=Q+ 51.Rxe1 
Nxe1 52.Kxe1 a5 53.b3 Kb6 54.Kd2 Be4 55.Kc1 Kc5 56.Kb2 Bd3 57.Kc1 Kd6 58.
Kd2 Bg6 59.Kc1 Ke5 60.Kd1 Bf7 61.Kc2 Ke4 62.c4 b4 63.Kd2 Kd4 64.Kc2 Bg6+ 
65.Kb2 Be4 66.Ka2 Kc3 0-1

