[Event "Ch Argentina (1/2 final)"] [Site "masterchessopen.com - Buenos Aires (Argentina)"] [Date "2006.03.23"] [Round "3"] [White "Diaz Nahuel (ARG)"] [Black "Calderon Fernandez Gervasio (ARG)"] [Result "1-0"] [WhiteElo "2404"] [BlackElo "2253"] [ECO "A17"] [Opening "English: Nimzo-English, 4.Qc2"] 1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4 4.Qc2 O-O 5.a3 Bxc3 6.Qxc3 c5 7.g3 Nc6 8.Bg2 Re8 9.b4 cxb4 10.axb4 Ne4 11.Qc2 d5 12.b5 Ne7 13.O-O Nd6 14.d3 dxc4 15.dxc4 Qc7 16.c5 Nxb5 17.Bf4 Nd4 18.Nxd4 e5 19.Nb5 Qd7 20.Qa4 exf4 21.Rfd1 Qg4 22.Nc7 {#r} 1-0