[Event "Ch Pan-American (juniors) (under 18)"] [Site "Villa Giardino"] [Round "4"] [White "Contreras Torres Javier (MEX)"] [Black "Mackeprang Luis (ARG)"] [Result "1-0"] [WhiteElo "2190"] [BlackElo "2121"] [ECO "B90"] [Opening "Sicilian: Najdorf"] 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 e6 7.Bb3 b5 8.O-O Be7 9.f4 Qc7 10.f5 e5 11.Nde2 Qa7+ 12.Kh1 Nbd7 13.Nd5 Ng4 14.Nd4 Ndf6 15.Nc6 Qc5 16.Ncxe7 Nf2+ 17.Rxf2 Qxf2 18.Be3 Qh4 19.Nxf6+ Kxe7 20.Nd5+ {#r} 1-0