[Event "Biel Interzonal"]
[Site "Biel SUI"]
[Date "1976.08.02"]
[EventDate "1976.07.11"]
[Round "16"]
[Result "1/2-1/2"]
[White "Joaquin Carlos Diaz Diaz"]
[Black "Istvan Csom"]
[ECO "D63"]
[WhiteElo "2385"]
[BlackElo "2490"]
[PlyCount "98"]

1.d4 d5 2.c4 e6 3.Nc3 Be7 4.Nf3 Nf6 5.Bg5 Nbd7 6.e3 O-O 7.Rc1
a6 8.cxd5 exd5 9.Bd3 c6 10.O-O Re8 11.Qc2 Nf8 12.Ne5 Ng4
13.Bxe7 Qxe7 14.Nf3 Be6 15.Na4 Rad8 16.Nc5 Bc8 17.h3 Nf6
18.Ne5 Ne4 19.Nxe4 dxe4 20.Bxe4 f6 21.Bxc6 fxe5 22.Bxe8 Rxe8
23.Qb3+ Kh8 24.dxe5 Qxe5 25.Rfd1 Qb8 26.Qb6 Bd7 27.Rd6 Bc6
28.Rcd1 Qc8 29.Rd8 Qe6 30.Rxe8 Qxe8 31.Rd8 Qe7 32.Qc7 Qf6
33.f3 Kg8 34.e4 Qxb2 35.e5 Qb1+ 36.Kh2 Qf5 37.Qd6 Qf4+ 38.Kg1
Qe3+ 39.Kh2 Qf4+ 40.Kg1 h5 41.Qc5 Qf5 42.Qd6 Bd7 43.h4 Qf7
44.a4 Be8 45.Qb8 Bxa4 46.e6 Qe7 47.Rc8 Bd7 48.exd7 Qe1+ 49.Kh2
Qxh4+ 1/2-1/2