[Event "First Swiss"] [Site "Durban"] [Date "1979.??.??"] [Round "8"] [White "Mercer, Paul"] [Black "Boulle, Gerald"] [Result "1-0"] [WhiteElo "?"] [BlackElo "?"] 1.b4 e5 2.Bb2 d6 3.c4 Be6 4.e3 Nd7 5.Nf3 f5 6.Qc2 Nh6 7.d4 e4 8.d5 Bxd5 $2 ({better was} 8...Bf7 {as c7 and his light squares are now weak}) 9.cxd5 exf3 10.gxf3 Rg8 11.Nd2 g6 12.Nb3 Bg7 13.Nd4 Nf8 $2 {this stops Ne6 but he is lost after this} (13...Bxd4 14.Bxd4 a6 {when, although the Bishop pair gives White a clear plus, Black can play ...Rc8 and Nf7 and hope to hang on}) 14.Rc1 Rc8 15.Qa4+ Kf7 16.Qxa7 Rb8 17.Qa5 Rc8 18.Qb5 Rb8 19.Qc4 Rc8 20.Qb5 Rb8 21.Rc2 Bxd4 22.Bxd4 Nd7 23.Ba7 Rc8 24.Qxb7 Re8 25.Be2 Ng8 26.h4 Ngf6 27.f4 h5 28.Ba6 1-0