[Event "interzonal play-off"]
[Site "Amsterdam NED"]
[Date "1964.06.25"]
[Round "1"]
[White "Reshevsky, Samuel Herman"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[ECO "D29"]
[EventDate "1964.06.25"]
[PlyCount "79"]

1.Nf3 c5 2.c4 Nf6 3.Nc3 e6 4.e3 d5 5.d4 dxc4 6.Bxc4 a6 7.O-O b5 8.Bb3 Bb7 
9.Qe2 Nbd7 10.Rd1 Qb8 11.e4 cxd4 12.Nxd4 Bd6 13.h3 O-O 14.a3 Rd8 15.Bc2 
Bh2+ 16.Kh1 Bf4 17.Nb3 Bxc1 18.Raxc1 Ne5 19.Na5 Qc7 20.Nxb7 Qxb7 21.Rxd8+ 
Rxd8 22.Rd1 Qc7 23.Bb3 h6 24.g3 Nc6 25.Qe3 Na5 26.Rxd8+ Qxd8 27.Ba2 Nc4 
28.Bxc4 bxc4 29.Kg2 Qb8 30.Qe2 Qb3 31.Qd2 Qb6 32.f3 Nd7 33.Nd1 Ne5 34.Ne3 
Qc5 35.f4 Nd3 36.Kf3 Qb5 37.Nd1 f5 38.exf5 Qd5+ 39.Ke3 exf5 40.Nc3 0-1

[Event "interzonal play-off"]
[Site "Amsterdam NED"]
[Date "1964.06.27"]
[Round "2"]
[White "Portisch, Lajos"]
[Black "Reshevsky, Samuel Herman"]
[Result "1/2-1/2"]
[ECO "B39"]
[EventDate "1964.06.25"]
[PlyCount "48"]

1.c4 c5 2.Nf3 g6 3.d4 cxd4 4.Nxd4 Bg7 5.e4 Nc6 6.Be3 Nf6 7.Nc3 Ng4 8.Qxg4 
Nxd4 9.Qd1 Ne6 10.Qd2 Qa5 11.Rc1 g5 12.h4 h6 13.Qd5 Qb4 14.Rc2 d6 15.hxg5 
hxg5 16.Rxh8+ Bxh8 17.Qb5+ Qxb5 18.Nxb5 Bd7 19.Nc3 b6 20.Nd5 Rc8 21.f3 Nd4
22.Rd2 Ne6 23.Rc2 Nd4 24.Rd2 Ne6 1/2-1/2

[Event "interzonal play-off"]
[Site "Amsterdam NED"]
[Date "1964.06.29"]
[Round "3"]
[White "Reshevsky, Samuel Herman"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[ECO "B85"]
[EventDate "1964.06.25"]
[PlyCount "74"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.Be2 b5 7.a3 Bb7 8.f4 Nf6 
9.Bf3 Nc6 10.Nb3 d6 11.O-O Be7 12.Qe2 O-O 13.Be3 Nd7 14.Rad1 Nb6 15.Kh1 
Nc4 16.Bc1 Qb6 17.g4 a5 18.a4 bxa4 19.Qxc4 axb3 20.Na4 Qa6 21.cxb3 e5 22.
Be3 exf4 23.Bxf4 Ne5 24.Bxe5 dxe5 25.Qc7 Rae8 26.Nc5 Bxc5 27.Qxc5 Qg6 28.
Qe3 Rd8 29.Rfe1 Rxd1 30.Rxd1 h6 31.Kg2 f5 32.h3 fxg4 33.hxg4 Rf4 34.Re1 
Bc8 35.Kh1 Bxg4 36.Bg2 Qh5+ 37.Kg1 Bf3 0-1

