[Event "Potsdam ch-DDR"]
[Site "Potsdam GDR"]
[Date "1974.02.??"]
[EventDate "1974.02.00"]
[Round "15"]
[Result "1-0"]
[White "Hans-Ulrich Gruenberg"]
[Black "Lothar Zinn"]
[ECO "D50"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "45"]

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Bb4 5.e3 h6 6.Bh4 O-O 7.Bd3 c5
8.Nf3 cxd4 9.exd4 dxc4 10.Bxc4 Qc7 11.Qd3 Nd5 12.Bg3 Qa5
13.Rc1 b6 14.O-O Bxc3 15.bxc3 Ba6 16.Ne5 Bxc4 17.Qxc4 Na6
18.a4 Nac7 19.Qb3 b5 20.axb5 Nxb5 21.Ra1 Qb6 22.Nd7 Nxd4
23.Qc4 1-0