[Event "It"] [Site "masterchessopen.com Rio de Janeiro (Brazil)"] [Round "1"] [White "Vasconcellos Fernando A"] [Black "De Souza Mendes Joao (BRA)"] [Result "0-1"] [ECO "B90"] [Opening "Sicilian: Najdorf"] 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5 7.Nf3 Be7 8.Bg5 Nbd7 9.h3 h6 10.Be3 b5 11.Nd5 Bb7 12.Qd3 Nxd5 13.exd5 Nf6 14.Qb3 Bxd5 15.c4 Be6 16.a4 bxc4 17.Bxc4 d5 18.Rd1 Qa5+ 19.Bd2 dxc4 20.Qb7 Qd5 {#R} 0-1