[Event "Olympiad"] [Site "masterchessopen.com Munich (Germany)"] [Round "6"] [White "Portisch Lajos (HUN)"] [Black "Bertholdt Dieter"] [Result "1/2-1/2"] [WhiteElo "2523"] [ECO "E30"] [Opening "Nimzo-Indian: Leningrad, 4...h6"] 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 h6 5.Bh4 c5 6.d5 b5 7.e4 bxc4 8.Bxc4 Bb7 9.Ne2 exd5 10.Bxd5 Bxd5 11.Bxf6 Qxf6 12.Qxd5 Nc6 13.O-O O-O 14.Rac1 Rac8 15.Rfd1 Rfd8 16.Qb3 Bxc3 17.Qxc3 Qe6 18.Qc4 d6 19.f3 Rb8 20.Rd2 Kf8 21.Qa4 Ne5 22.Nf4 Qd7 23.Qxd7 Rxd7 24.b3 Rbd8 25.Nd5 Nc6 26.Ne3 Ne7 27.Rcd1 Ke8 28.Kf2 h5 29.Kg3 f6 30.Kh4 g6 31.f4 Kf7 32.Nc4 Ke6 33.Kg3 f5 34.e5 d5 35.Nb2 Rc7 36.Rc1 Rdc8 37.Rdc2 Rc6 38.Kf3 h4 39.Ke3 a6 40.Na4 c4 41.Kd4 cxb3 42.Nc5+ Kf7 43.axb3 Rb8 44.Ke3 Rb4 45.Ra2 d4+ 46.Kd2 Rb5 47.Nd3 Rxb3 48.Rxc6 Nxc6 49.Nc5 Rc3 50.Nxa6 g5 51.Nc7 Nxe5 52.fxe5 Rxc7 53.Ra6 f4 54.Kd3 h3 55.gxh3 Rc3+ 56.Kxd4 Rxh3 {#d} 1/2-1/2