[Event "18th olm qual. group 4"]
[Site "Lugano SUI"]
[Date "1968.10.23"]
[Round "6"]
[White "Quesada, Roberto CRC"]
[Black "Prins, Lodewijk NED"]
[Result "0-1"]
[ECO "B01"]
[EventDate "1968.10.17"]
[PlyCount "62"]

1.e4 d5 2.exd5 Qxd5 3.Nc3 Qa5 4.d3 Nf6 5.Bd2 e5 6.a3 c6 7.Be2 Be7 8.Nf3 
Nbd7 9.O-O Qc7 10.h3 O-O 11.Re1 Nd5 12.Ne4 Nc5 13.Bf1 Ne6 14.g3 f5 15.Nc3 
Bd6 16.Nxd5 cxd5 17.Bb4 Bxb4 18.axb4 e4 19.dxe4 dxe4 20.Nd4 Rd8 21.c3 Nxd4
22.cxd4 Be6 23.Qd2 Qb6 24.Ra5 Rxd4 25.Qg5 Rxb4 26.Re5 Rxb2 27.Qf4 Rc8 28.
Be2 Rb1 29.Rxb1 Qxb1+ 30.Kg2 Rc1 31.Rxe4 Qxe4+ 0-1

