[Event "Olympiad"] [Site "masterchessopen.com – Lucerne (Switzerland)"] [Round "0"] [White "Petursson Margeir (ISL)"] [Black "Birnboim Nathan (ISR)"] [Result "1-0"] [WhiteElo "2540"] [BlackElo "2460"] [ECO "D85"] [Opening "Gruenfeld: Exchange, 5.e4"] 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5 8.Rb1 Nc6 9.d5 Ne5 10.Nxe5 Bxe5 11.Bb5+ Kf8 12.Bh6+ Kg8 13.O-O Bxc3 14.Qb3 Bd4 15.Bc4 Qd6 16.Kh1 b6 17.f4 Rb8 18.e5 Qd8 19.f5 Qe8 20.d6 e6 21.fxe6 {#r} 1-0