[Event "World op"]
[Site "Philadelphia"]
[Date "1985.??.??"]
[Round "?"]
[White "Gruenfeld, Yehuda"]
[Black "Christiansen, Larry Mark"]
[Result "1-0"]
[WhiteElo "2475"]
[BlackElo "2560"]
[ECO "B17"]

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Ne5 Be6 8.Be2 g6
9.O-O Bg7 10.c4 O-O 11.Be3 Qc7 12.Qc1 Rad8 13.Rd1 Nd7 14.Nf3 Bg4 15.h3 Bxf3
16.Bxf3 Nb6 17.Qc2 Nc8 18.Qe2 Rfe8 19.Rd2 Nd6 20.g4 e6 21.Rad1 Qa5 22.b3 Nc8
23.Bf4 Ne7 24.Qe3 b5 25.Bg5 bxc4 26.bxc4 Rc8 27.Rb1 Rc7 28.Bxe7 Rcxe7 29.Bxc6 Rc8
30.d5 exd5 31.Qxe7 Qxd2 32.Bxd5 Rf8 33.Rb7 Qf4 34.Qe3 Qxe3 35.fxe3 a5 36.c5 Be5
37.Re7 Bf6 38.Ra7 Rd8 39.c6 Be5 40.Bxf7+ Kf8 41.Bb3 Rd3 42.c7  1-0

