[Event "Zuerich m"]
[Site "Zuerich"]
[Date "1977.??.??"]
[Round "4"]
[White "Kortschnoj, Viktor"]
[Black "Hug, Werner"]
[Result "1/2-1/2"]
[WhiteElo "2645"]
[BlackElo "2445"]
[ECO "E91"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Nf3 Bg4 7.Be3 Nfd7 8.O-O Nc6
9.Ne1 Bxe2 10.Nxe2 e6 11.Rc1 Qe7 12.d5 Nd8 13.Nd3 c5 14.dxc6 Nxc6 15.b4 Nde5
16.Nxe5 Nxe5 17.Nd4 Rac8 18.Qe2 Rfd8 19.a3 d5 20.cxd5 Rxc1 21.Rxc1 exd5 22.exd5 Rxd5  1/2-1/2

