[Event "D26"] [Site "Cleanchess.com ?"] [Date "1977.01.01"] [Round "1"] [White "Wirthensohn, Heinz"] [Black "Niklasson, Christer"] [Result "1-0"] [ECO "D20"] [Opening "QGA: 3.e3 Nf6"] 1.d4 d5 2.c4 dxc4 3.e3 Nf6 4.Bxc4 e6 5.Nf3 c5 6.O-O Nc6 7.Nc3 Be7 8.a3 cxd4 9.exd4 O-O 10.Re1 b6 11.Qd3 Bb7 12.Ba2 Rc8 13.Bf4 Re8 14.Rad1 Bf8 15.d5 exd5 16.Rxe8 Qxe8 17.Re1 Qd8 18.Nxd5 h6 19.Bg5 hxg5 20.Nxg5 Ne4 {#r} 1-0