[Event "corr."] [Site "masterchessopen.com Argentina"] [Round "0"] [White "Dieta Carlos"] [Black "Carvalho Joao"] [Result "1-0"] [ECO "B90"] [Opening "Sicilian: Najdorf"] 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 Qc7 9.O-O-O Nbd7 10.g4 b5 11.Bxf6 gxf6 12.f5 Ne5 13.Qh3 b4 14.Nce2 exf5 15.Nxf5 Bxf5 16.gxf5 Nc4 17.Nf4 Nb6 18.Qb3 a5 19.Bb5+ Kf8 20.Rhg1 Qc5 21.Qg3 {#r} 1-0