[Event "18th olm final B"]
[Site "Lugano SUI"]
[Date "1968.10.28"]
[Round "4"]
[White "Mecking, Henrique BRA"]
[Black "Donner, Jan NED"]
[Result "1/2-1/2"]
[ECO "D55"]
[EventDate "1968.10.17"]
[PlyCount "103"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 O-O 6.e3 b6 7.cxd5 Nxd5 8.Bxe7 
Qxe7 9.Nxd5 exd5 10.Be2 Be6 11.Qb3 c5 12.Qa3 Nc6 13.dxc5 Qxc5 14.Qxc5 bxc5
15.O-O Rab8 16.b3 Na5 17.Rfc1 Rfc8 18.Rc2 Rb6 19.Rac1 Nb7 20.Nd4 Rd8 21.
Nb5 a5 22.Nc7 Rc6 23.Nxe6 fxe6 24.Bf3 Rcd6 25.g3 a4 26.bxa4 c4 27.Rb1 Nc5 
28.a5 Ra6 29.Rb5 Nd3 30.Rc3 Rda8 31.Ra3 Ne5 32.Bg2 Nc6 33.Rc5 Rb8 34.e4 
Rb1+ 35.Bf1 Nb4 36.Kg2 Rb2 37.exd5 exd5 38.Rf3 Rc6 39.Rxc6 Nxc6 40.Ra3 Kf7
41.a6 Na7 42.Ra4 Kf6 43.Kf3 Ke5 44.Bxc4 dxc4 45.Rxc4 Rxa2 46.Rc7 Rxa6 47.
Rxg7 h6 48.Kg4 Kf6 49.Rb7 Nc6 50.f4 Nd8 51.Rb5 Kg6 52.h4 1/2-1/2

