[Event "Prague zt playoff"]
[Site "Prague"]
[Date "1970.??.??"]
[Round "?"]
[White "Portisch, Lajos"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[WhiteElo ""]
[BlackElo ""]
[ECO "D37"]

1.d4 d5 2.c4 e6 3.Nc3 Be7 4.Nf3 Nf6 5.Bf4 c5 6.dxc5 Na6 7.Bd6 dxc4 8.Qd4 O-O
9.e4 Nd7 10.Bxc4 Naxc5 11.Rd1 Bxd6 12.Qxd6 Qb6 13.Bb5 a6 14.Qxb6 Nxb6 15.Be2 Nba4
16.Nxa4 Nxa4 17.Rd4 b5 18.b3 Nc3 19.Kd2 Nxe2 20.Kxe2 Bb7 21.Rc1 Rac8 22.Rxc8 Rxc8
23.Ke3 f5 24.Nd2 fxe4 25.Rd6 Rc3+ 26.Ke2 e3 27.Rd8+ Kf7 28.Rd7+ Kf6 29.Rxb7 exd2
30.Kxd2 Rc6 31.Kd3 h5 32.h4 g6 33.f3 Rd6+ 34.Ke3 Rc6 35.g4 hxg4 36.fxg4 Ke5
37.Ra7 Rc3+ 38.Kd2 Rc6 39.h5 gxh5 40.gxh5 Kd4 41.Rg7 Rd6 42.Rg1 Ke4+ 43.Ke2 Rc6
44.Rh1 Rc2+ 45.Kd1 Rc8 46.h6 Kf5 47.h7 Rh8 48.Rh6 Kg5 49.Rxe6 Rxh7 50.Rxa6 Rh2
51.a3 b4 52.axb4 Kf5 53.Rc6 Ke4 54.Kc1 Kd5 55.Rc4 Kd6 56.Kb1 Rg2  1/2-1/2

