Robert Byrne vs Jan Hein Donner
[Event "San Juan"]
[Site "San Juan"]
[Date "1969.??.??"]
[Round "4"]
[White "Byrne, Robert E"]
[Black "Donner, Jan Hein"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "B07"]
1.e4 g6 2.d4 Bg7 3.c3 d6 4.f4 Nf6 5.Bd3 e5 6.Nf3 exf4 7.Bxf4 O-O 8.O-O c5
9.Nbd2 cxd4 10.cxd4 Nc6 11.Qb3 d5 12.e5 Ne4 13.Nxe4 dxe4 14.Bxe4 Nxd4 15.Qe3 Ne6
16.Bg3 Qb6 17.Qxb6 axb6 18.b4 b5 19.Rf2 Re8 20.Rc2 1/2-1/2
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