[Event "IBM"]
[Site "Amsterdam"]
[Date "1970.??.??"]
[Round "13"]
[White "Polugaevsky, Lev"]
[Black "Donner, Jan Hein"]
[Result "1-0"]
[WhiteElo ""]
[BlackElo ""]
[ECO "E73"]

1.c4 Nf6 2.Nc3 g6 3.e4 d6 4.d4 Bg7 5.Be2 O-O 6.Bg5 h6 7.Be3 e5 8.d5 Nbd7
9.h4 Nc5 10.Qc2 h5 11.f3 c6 12.b4 Na6 13.a3 cxd5 14.cxd5 Bd7 15.Nh3 Qb8 16.Nf2 b5
17.Nd3 Nc7 18.O-O Qb7 19.Nc1 Rac8 20.Qd2 Na8 21.Nb3 Nb6 22.Na5 Qb8 23.Rfc1 Rc7
24.Rc2 Rfc8 25.Rac1 a6 26.Bf1 Ne8 27.Qf2 Na8 28.Qd2 Nb6 29.Qf2 Na8 30.g3 Bf8
31.Kh2 Ng7 32.Bh3 f5 33.Nc6 Qb7 34.Na5 Qb8 35.Nc6 Qb7 36.Na7 Re8 37.Nd1 Rxc2
38.Rxc2 Be7 39.Nc6 Bf6 40.Na5 Qb8 41.Ba7 Qd8 42.Nc6 Bxc6 43.dxc6 f4 44.Nc3 Kh7
45.Nd5 fxg3+ 46.Qxg3 Bxh4 47.Qg2 Bg5 48.c7 Nxc7 49.Rxc7  1-0

