[Event "It (open)"] [Site "masterchessopen.com – Villa Ballester (Argentina)"] [Round "6"] [White "Mastronardi Ernesto"] [Black "Vieyra Daniel"] [Result "1-0"] [ECO "B90"] [Opening "Sicilian: Najdorf"] 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e6 7.O-O Be7 8.f4 O-O 9.Kh1 Nc6 10.Bf3 Qc7 11.Be3 Rb8 12.a4 Bd7 13.Nb3 Na5 14.Nxa5 Qxa5 15.Qd2 Rfe8 16.e5 dxe5 17.fxe5 Nd5 18.Nxd5 {#r} 1-0