[Event "IBM"]
[Site "Amsterdam"]
[Date "1971.??.??"]
[Round "15"]
[White "Keres, Paul"]
[Black "Donner, Jan Hein"]
[Result "1-0"]
[WhiteElo "2615"]
[BlackElo "2500"]
[ECO "B15"]

1.e4 c6 2.Nc3 d5 3.Nf3 g6 4.d4 Bg7 5.h3 dxe4 6.Nxe4 Nd7 7.Bc4 Ngf6 8.Qe2 Nxe4
9.Qxe4 Nb6 10.Bb3 a5 11.a4 Bf5 12.Qh4 Qd7 13.O-O Nd5 14.Re1 h6 15.Bd2 g5
16.Qg3 Qc7 17.Ne5 e6 18.Qf3 O-O-O 19.g4 Bxe5 20.Rxe5 Bg6 21.c4 Nb4 22.Bc3 Rhe8
23.Rd1 Re7 24.Qe2 Red7 25.Re3 b6 26.Re5 Kb7 27.Bxb4 axb4 28.d5 exd5 29.cxd5 cxd5
30.Rdxd5 Rxd5 31.Bxd5+ Ka7 32.Bf3 Bd3 33.Qe3 Ba6 34.a5 Rd7 35.Rf5 Bc4 36.axb6+ Qxb6
37.Ra5+ Ba6 38.Be2 Qxe3 39.Rxa6+ Kb7 40.fxe3 Rd2 41.Bf1 Rxb2 42.Rxh6 Rc2
43.Rf6 b3 44.Bd3 Rc3 45.Be4+ Kc8 46.Rc6+  1-0

