[Event "Olympiad"] [Site "masterchessopen.com Amsterdam (Netherlands)"] [Round "12"] [White "Doerner Charles"] [Black "Morcken Otto B"] [Result "1/2-1/2"] [ECO "D30"] [Opening "QGD: 3.Nf3 Nf6"] 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.g3 dxc4 5.Bg2 c5 6.O-O Nc6 7.dxc5 Qxd1 8.Rxd1 Bxc5 9.Nbd2 c3 10.bxc3 O-O 11.Nb3 Be7 12.Nfd4 Bd7 13.Nxc6 Bxc6 14.Bxc6 bxc6 15.Be3 Nd5 16.Bd4 f6 17.e4 Nc7 18.Bc5 Bxc5 19.Nxc5 Rfd8 20.Rab1 Nb5 21.Na4 {#d} 1/2-1/2