[Event "Ch Sao Paulo"] [Site "masterchessopen.com Americana (Brazil)"] [Round "4"] [White "Matsuura Everaldo (BRA)"] [Black "De Souza Marcos"] [Result "1-0"] [WhiteElo "2408"] [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 b5 10.e5 Bb7 11.Bxb5+ Kf8 12.exf6 Bxf6 13.Qh5 Bxd4 14.Rxd4 Qc5 15.Rhd1 axb5 16.Rxd6 Qe3+ 17.Kb1 Nc6 18.Rd7 {#r} 1-0