[Event "Olympiad"] [Site "masterchessopen.com Lugano (Switzerland)"] [Round "6"] [White "Pietzsch Wolfgang W (GDR)"] [Black "Hadri Ahmed"] [Result "1-0"] [WhiteElo "2420"] [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 Qc7 8.f4 Nc6 9.Be3 Be7 10.Qe1 O-O 11.Qg3 Re8 12.Kh1 Bd7 13.Rad1 Rad8 14.e5 Nd5 15.Nf5 g6 16.Nh6+ Kg7 17.f5 Nxe5 18.Rxd5 exd5 19.f6+ Bxf6 20.Rxf6 Be6 21.Nf5+ Bxf5 22.Rxf5 Qd7 23.Rf1 Qe6 24.Bg5 Rb8 25.Bf6+ Kg8 26.Qh4 Nd7 27.Bg4 Qxf6 28.Rxf6 Nxf6 29.h3 Kg7 30.Bf3 Re5 31.Qb4 Rd8 32.Qxb7 d4 33.Nd5 Ne4 34.Qb6 Nc5 35.Qxd8 {#r} 1-0