[Event "Hoogovens"]
[Site "Beverwijk"]
[Date "1965.??.??"]
[Round "10"]
[White "Portisch, Lajos"]
[Black "Donner, Jan Hein"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E25"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.f3 d5 5.a3 Bxc3+ 6.bxc3 c5 7.cxd5 Nxd5 8.dxc5 f5
9.Qc2 O-O 10.e4 Nf6 11.Bf4 e5 12.Bc4+ Kh8 13.Bxe5 fxe4 14.Bd6 Bf5 15.Ne2 Re8
16.O-O exf3 17.Qxf5 fxe2 18.Rfe1 Qd7 19.Qxd7 Nbxd7 20.Rxe2 Rxe2 21.Bxe2 Ne4
22.Bf3 Ndxc5 23.Be5 Re8 24.Bd4 b6 25.Re1 Nf6 26.Rxe8+ Nxe8 27.Be5 Nd7 28.Bf4 Kg8
29.Kf2 Kf7 30.Ke3 Ke6 31.Kd4 Ndf6 32.g4 h6 33.c4 Nd6 34.h3 Nd7 35.Bc6 Nf6
36.a4 Nd7 37.a5 Nc5 38.Bd5+ Kd7 39.Be5 Ne8 40.Bb8 Nb3+ 41.Kc3 Nxa5 42.Bxa7 Kc7
43.c5 bxc5 44.Bxc5 Nc6 45.Bf8 Ne5 46.Ba3 Kd7 47.Kd4 Ng6  1/2-1/2

