[Event "Olympiad"] [Site "masterchessopen.com Leipzig (Germany)"] [Round "4"] [White "Pachman Ludek (GER)"] [Black "Portisch Lajos (HUN)"] [Result "1/2-1/2"] [WhiteElo "2278"] [BlackElo "2523"] [ECO "E47"] [Opening "Nimzo-Indian: 4.e3 O-O 5.Bd3"] 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 b6 9.a3 cxd4 10.Nb5 Be7 11.Nbxd4 Bb7 12.b4 Nc6 13.Bb2 Rc8 14.Qb3 Nxd4 15.Nxd4 Bd5 {#d} 1/2-1/2