[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.28"]
[Round "1"]
[White "De Rooi, Paul"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[ECO "C68"]
[EventDate "1963.08.28"]
[PlyCount "66"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.b3 c5 6.Bb2 f6 7.Nxe5 fxe5 8.Qh5+
Kd7 9.Qxe5 Nf6 10.Nc3 Qe8 11.Qg3 Qg6 12.e5 Qxg3 13.hxg3 Ng4 14.Ne2 Kc6 15.
f3 Nh6 16.g4 Nxg4 17.fxg4 Bxg4 18.Rf1 Re8 19.Rf4 h5 20.Kf2 Be7 21.Rf1 Bg5 
22.Rf7 Bxd2 23.Ng3 Rhf8 24.Kg1 Be3+ 25.Kh2 Rxf7 26.Rxf7 Bh6 27.Ne4 Be6 28.
Rf2 b5 29.Ng3 Be3 30.Rf3 Bd4 31.Bxd4 cxd4 32.Ne2 Kd5 33.c3 Bg4 0-1

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.28"]
[Round "1"]
[White "Donner, Jan"]
[Black "Udovcic, Mijo"]
[Result "1/2-1/2"]
[ECO "E64"]
[EventDate "1963.08.28"]
[PlyCount "48"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nc3 d6 6.Nf3 c5 7.d5 a6 8.a4 e6 9.
dxe6 Bxe6 10.Bf4 Nc6 11.Bxd6 Re8 12.Bxc5 Qa5 13.Be3 Ng4 14.Bd2 Bxc4 15.O-O
Qb6 16.a5 Qc5 17.Qc1 Rad8 18.h3 Nge5 19.Be3 Nxf3+ 20.Bxf3 Nd4 21.Kg2 Qe7 
22.Bxd4 Bxd4 23.Re1 Bb3 24.e3 Bg7 1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.28"]
[Round "1"]
[White "Langeweg, Christian"]
[Black "Barendregt, Johan"]
[Result "1-0"]
[ECO "A42"]
[EventDate "1963.08.28"]
[PlyCount "125"]

1.d4 d6 2.c4 g6 3.Nc3 Bg7 4.e4 c5 5.d5 e5 6.Be2 Nd7 7.g4 f6 8.h4 Nh6 9.h5 
Nf7 10.Be3 Bh6 11.Qd2 Bxe3 12.Qxe3 g5 13.Nf3 O-O 14.Nd2 Nb8 15.O-O Na6 16.
a3 Nc7 17.b4 b6 18.Rfb1 Bd7 19.f3 Qe7 20.Rb2 Rfb8 21.Rab1 Qe8 22.Kg2 Qc8 
23.Kg3 Ne8 24.Bd1 Ng7 25.Ba4 Bxa4 26.Nxa4 Qd7 27.Nc3 Rc8 28.Qe2 Ne8 29.
bxc5 dxc5 30.a4 Ned6 31.Nb3 Rab8 32.Qf1 Rb7 33.a5 Rcb8 34.axb6 axb6 35.Ra2
Qc7 36.Rba1 Kg7 37.Ra6 Qd7 38.Nd1 Nc8 39.Ne3 Nfd6 40.R1a3 Ra7 41.Rxa7 Nxa7
42.Qa1 Nac8 43.Nc1 Rb7 44.Ne2 Ra7 45.Nc3 Kf7 46.Kf2 Rxa3 47.Qxa3 Qa7 48.
Qxa7+ Nxa7 49.Na4 Nac8 50.Ke2 Ke8 51.Kd3 Kd7 52.Nf5 Kc7 53.Ng7 h6 54.Nc3 
Kd7 55.Nf5 Nxf5 56.exf5 Nd6 57.Ne4 Ke7 58.Kc3 b5 59.cxb5 Nxb5+ 60.Kc4 Nd4 
61.d6+ Kd8 62.Kxc5 Nxf3 63.Nxf6 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.28"]
[Round "1"]
[White "Milic, Borislav"]
[Black "Czerniak, Moshe"]
[Result "1/2-1/2"]
[ECO "B77"]
[EventDate "1963.08.28"]
[PlyCount "138"]

1.Nf3 g6 2.e4 Bg7 3.d4 c5 4.Nc3 cxd4 5.Nxd4 Nc6 6.Be3 d6 7.Qd2 Nf6 8.f3 
O-O 9.Bc4 Nxd4 10.Bxd4 Be6 11.Bb3 a6 12.O-O b5 13.Rad1 Rc8 14.Rfe1 Nd7 15.
Bxg7 Kxg7 16.Nd5 a5 17.Ne3 a4 18.Bd5 Kg8 19.a3 Qb6 20.c3 Ne5 21.Qf2 Nc4 
22.Bxc4 bxc4 23.Nd5 Qxf2+ 24.Kxf2 Bxd5 25.Rxd5 Rb8 26.Re2 Rb6 27.Ra5 Rfb8 
28.Rxa4 Rxb2 29.Rxc4 Rxe2+ 30.Kxe2 Rb2+ 31.Kf1 Kg7 32.h4 Kf6 33.Kg1 e6 34.
Kh2 d5 35.exd5 exd5 36.Rd4 Ke5 37.f4+ Ke6 38.c4 dxc4 39.Rxc4 Ra2 40.Ra4 
Kf5 41.Kg3 Rc2 42.Ra5+ Kf6 43.h5 gxh5 44.Rxh5 Rc3+ 45.Kh2 Rxa3 46.Rxh7 Kg6
47.Rh3 Ra4 48.Kg3 f6 49.Rh8 Ra3+ 50.Kg4 Ra4 51.Rg8+ Kf7 52.Rb8 Kg6 53.Rb5 
Rc4 54.g3 Ra4 55.Rb3 Rc4 56.Kf3 f5 57.Rb6+ Kh5 58.Kg2 Rc3 59.Rb8 Kg6 60.
Kh3 Rc1 61.Rb6+ Kg7 62.Kh4 Rc3 63.Rd6 Ra3 64.Kg5 Rxg3+ 65.Kxf5 Ra3 66.Rd7+
Kf8 67.Ke6 Ra6+ 68.Rd6 Rxd6+ 69.Kxd6 Kf7 1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.28"]
[Round "1"]
[White "Parma, Bruno"]
[Black "Kuijpers, Franciscus"]
[Result "1/2-1/2"]
[ECO "C72"]
[EventDate "1963.08.28"]
[PlyCount "52"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.O-O Bg4 6.h3 Bh5 7.c3 Nf6 8.Bxc6+ 
bxc6 9.d4 exd4 10.cxd4 Be7 11.Nbd2 Qd7 12.Re1 O-O 13.Nf1 d5 14.exd5 Bxf3 
15.Qxf3 cxd5 16.Ng3 Rfe8 17.Bf4 Bb4 18.Re2 Rxe2 19.Qxe2 Bd6 20.Be5 Ne8 21.
Qf3 Bxe5 22.dxe5 Rd8 23.Nf5 g6 24.Nd4 c5 25.Nb3 Qe7 26.Qe2 Nc7 1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.29"]
[Round "2"]
[White "Barendregt, Johan"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "B52"]
[EventDate "1963.08.28"]
[PlyCount "57"]

1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Qxd7 5.O-O Nf6 6.Re1 Nc6 7.b3 e6 8.Bb2
Be7 9.d4 cxd4 10.Nxd4 d5 11.Nd2 dxe4 12.Nxe4 Nxe4 13.Rxe4 Bf6 14.Nxc6 Bxb2
15.Qxd7+ Kxd7 16.Ne5+ Ke7 17.Rd1 Rhd8 18.Rxd8 Rxd8 19.Nd3 Bd4 20.Kf1 h5 
21.Nf4 g6 22.c4 e5 23.Nd5+ Kd6 24.f4 f5 25.Re1 e4 26.Rd1 Kc5 27.Nc7 Rd6 
28.Rxd4 Kxd4 29.Nb5+ 1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.29"]
[Round "2"]
[White "Czerniak, Moshe"]
[Black "Kuijpers, Franciscus"]
[Result "1-0"]
[ECO "B20"]
[EventDate "1963.08.28"]
[PlyCount "81"]

1.e4 c5 2.b3 Nc6 3.Bb2 e6 4.Nf3 d6 5.d4 cxd4 6.Nxd4 Nf6 7.Nxc6 bxc6 8.e5 
Ne4 9.Bd3 Qa5+ 10.Ke2 Nc5 11.exd6 Bxd6 12.Bxg7 Rg8 13.Bxh7 Ba6+ 14.c4 Rxg7
15.Qxd6 Qb6 16.Bc2 Rxg2 17.Qd4 Rd8 18.Qe3 Rd5 19.Nc3 Rh5 20.Ne4 Nxe4 21.
Qxb6 axb6 22.Bxe4 Rgxh2 23.Bxc6+ Ke7 24.Rxh2 Rxh2 25.Rh1 Rxh1 26.Bxh1 Kd6 
27.Kd2 Bc8 28.Kc3 f5 29.Kb4 Bd7 30.a4 e5 31.a5 bxa5+ 32.Kxa5 Kc7 33.b4 e4 
34.b5 Bc8 35.Bg2 Bb7 36.Bf1 f4 37.Be2 Bc8 38.c5 Bb7 39.Kb4 Bd5 40.Kc3 Bb7 
41.Kd4 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.29"]
[Round "2"]
[White "Milic, Borislav"]
[Black "Langeweg, Christian"]
[Result "1-0"]
[ECO "B49"]
[EventDate "1963.08.28"]
[PlyCount "67"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 a6 6.Be3 Qc7 7.a3 Nf6 8.Be2 
Bd6 9.h3 O-O 10.O-O Bh2+ 11.Kh1 Bf4 12.Qd3 Bxe3 13.Qxe3 d6 14.Rad1 Rd8 15.
f4 Bd7 16.Nb3 b5 17.Rd2 Be8 18.Rfd1 b4 19.axb4 Nxb4 20.Bf3 Bc6 21.e5 Nfd5 
22.exd6 Qb8 23.Qc5 Rxd6 24.Na5 Qf8 25.Ne4 Rdd8 26.c3 Ba4 27.b3 Nc6 28.Nxc6
Bxc6 29.Qxc6 Rdc8 30.Qd6 Qe8 31.c4 Ne3 32.Ra1 Rab8 33.Qd3 Nf5 34.Rxa6 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.29"]
[Round "2"]
[White "Portisch, Lajos"]
[Black "Parma, Bruno"]
[Result "1/2-1/2"]
[ECO "B36"]
[EventDate "1963.08.28"]
[PlyCount "76"]

1.c4 c5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 cxd4 5.Nxd4 g6 6.e4 Nxd4 7.Qxd4 d6 8.c5 
Bg7 9.Bb5+ Bd7 10.cxd6 Bxb5 11.Nxb5 O-O 12.O-O exd6 13.Nc3 Re8 14.Qd3 Qa5 
15.Bd2 Qe5 16.f3 a6 17.Rad1 Rad8 18.Be3 Nh5 19.Bd4 Qxd4+ 20.Qxd4 Bxd4+ 21.
Rxd4 Nf6 22.Rfd1 Re6 23.Kf2 Kf8 24.f4 Rc8 25.Kf3 Ne8 26.a4 Rc5 27.Rb4 Re7 
28.Nd5 Rd7 29.Rd3 b5 30.axb5 axb5 31.Ra3 Kg7 32.Ra5 Rb7 33.g4 f5 34.gxf5 
gxf5 35.Ne3 fxe4+ 36.Rxe4 Kf7 37.Ra8 Nf6 38.Rd4 Rh5 1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.29"]
[Round "2"]
[White "Udovcic, Mijo"]
[Black "De Rooi, Paul"]
[Result "1-0"]
[ECO "E62"]
[EventDate "1963.08.28"]
[PlyCount "51"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.O-O Nc6 7.Nc3 e5 8.d5 Ne7 
9.c5 Nd7 10.cxd6 cxd6 11.Ng5 Nf6 12.e4 h6 13.Nf3 Bd7 14.a4 g5 15.Nd2 Ng6 
16.Nc4 Qe7 17.Qb3 Rfc8 18.Nb5 Bxb5 19.Qxb5 Rc5 20.Qb4 a5 21.Qb3 Qc7 22.Na3
Qe7 23.Be3 Rcc8 24.Nc4 Nd7 25.Qb5 Nc5 26.Nb6 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.30"]
[Round "3"]
[White "De Rooi, Paul"]
[Black "Barendregt, Johan"]
[Result "0-1"]
[ECO "B07"]
[EventDate "1963.08.28"]
[PlyCount "72"]

1.d4 d6 2.e4 Nf6 3.Nc3 e5 4.dxe5 dxe5 5.Qxd8+ Kxd8 6.Bc4 Be6 7.Bxe6 fxe6 
8.Nf3 Bd6 9.Be3 Ke7 10.O-O-O Nc6 11.Nd2 a6 12.f3 h6 13.Ne2 Nd7 14.Nb3 Nb6 
15.h4 Nc4 16.Bf2 g6 17.Nc5 b6 18.Nd3 Raf8 19.b3 N4a5 20.Be3 Nb7 21.f4 Nc5 
22.Bxc5 bxc5 23.fxe5 Nxe5 24.Nef4 Rhg8 25.Nxe5 Rxf4 26.Nc4 Rxe4 27.h5 gxh5
28.Rxh5 Rxg2 29.Rd3 Ree2 30.Rc3 Rh2 31.Rxh2 Rxh2 32.Rf3 h5 33.Nd2 Rh1+ 34.
Kb2 Rh4 35.Kc3 Rg4 36.Nf1 Rf4 0-1

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.30"]
[Round "3"]
[White "Donner, Jan"]
[Black "Milic, Borislav"]
[Result "1-0"]
[ECO "E83"]
[EventDate "1963.08.28"]
[PlyCount "111"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 Nc6 7.Nge2 a6 8.Nc1 e5 
9.d5 Nd4 10.Nb3 Nxb3 11.axb3 Nh5 12.Bd3 Nf4 13.O-O f5 14.exf5 Nxd3 15.Qxd3
Bxf5 16.Qd2 Qe7 17.g4 Bd7 18.Ne4 Rf7 19.Kg2 Qf8 20.h3 h6 21.Rf2 Kh7 22.Rh1
Qe7 23.h4 Rh8 24.h5 g5 25.Qc2 Kg8 26.Rc1 Bf8 27.c5 Rhh7 28.cxd6 cxd6 29.
Qc7 Bb5 30.Qxe7 Bxe7 31.Rc3 Rf8 32.Bb6 Rhf7 33.Bc7 Rf4 34.Bxd6 Bxd6 35.
Nxd6 Bd7 36.Rd2 e4 37.Nxe4 Bxg4 38.d6 Bd7 39.Nc5 R8f7 40.Nxd7 Rxd7 41.Rc7 
Rff7 42.Rxd7 Rxd7 43.Kg3 Kf7 44.f4 gxf4+ 45.Kxf4 Ke6 46.b4 Rf7+ 47.Ke4 Kd7
48.Ke5 Rf1 49.Rg2 Re1+ 50.Kd5 Rd1+ 51.Kc5 Rc1+ 52.Kb6 Rc4 53.Rg7+ Kxd6 54.
Rxb7 Rc2 55.Kxa6 Rxb2 56.Kb5 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.30"]
[Round "3"]
[White "Kuijpers, Franciscus"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[ECO "C90"]
[EventDate "1963.08.28"]
[PlyCount "60"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 
9.d3 Be6 10.Nbd2 Bxb3 11.Qxb3 Nd7 12.Qc2 g6 13.Nf1 f5 14.a4 fxe4 15.dxe4 
Nc5 16.axb5 axb5 17.Be3 Rb8 18.Red1 Qc8 19.Bh6 Rf7 20.Ne3 Rxf3 21.gxf3 Qh3
22.Qd2 Ne6 23.Nd5 g5 24.Ra6 Rb6 25.Rxb6 cxb6 26.Nxe7+ Nxe7 27.Bxg5 Kf7 28.
Qe3 Ng6 29.Rxd6 Ngf4 30.Bxf4 Nxf4 0-1

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.30"]
[Round "3"]
[White "Langeweg, Christian"]
[Black "Czerniak, Moshe"]
[Result "0-1"]
[ECO "E92"]
[EventDate "1963.08.28"]
[PlyCount "54"]

1.c4 Nf6 2.Nc3 g6 3.d4 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.d5 Ne8 8.Bg5 f6 9.
Bh4 Nd7 10.Nd2 Rf7 11.O-O Nf8 12.b4 g5 13.Bg3 Ng6 14.Bg4 Bf8 15.Bxc8 Qxc8 
16.Nb3 Ng7 17.c5 h5 18.f3 h4 19.Bf2 Nh5 20.Rc1 Qe8 21.Na5 b6 22.Nc6 Ngf4 
23.Nb5 Rg7 24.Ncxa7 bxc5 25.bxc5 dxc5 26.Bxc5 Bxc5+ 27.Rxc5 Qb8 0-1

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.30"]
[Round "3"]
[White "Parma, Bruno"]
[Black "Udovcic, Mijo"]
[Result "1-0"]
[ECO "B42"]
[EventDate "1963.08.28"]
[PlyCount "51"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Nc6 6.Nxc6 bxc6 7.O-O d5 8.c4 
Nf6 9.Nc3 dxc4 10.Bxc4 Qxd1 11.Rxd1 Rb8 12.Rb1 e5 13.Be3 Bb4 14.f3 Ke7 15.
Na4 Nd7 16.Rbc1 f6 17.Rd3 Rd8 18.Rcd1 Bb7 19.a3 Ba5 20.Kf2 Bc7 21.b4 a5 
22.b5 cxb5 23.Bxb5 Bc8 24.Nc3 Ke8 25.Nd5 Bd6 26.Nb6 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.31"]
[Round "4"]
[White "Barendregt, Johan"]
[Black "Parma, Bruno"]
[Result "1/2-1/2"]
[ECO "B52"]
[EventDate "1963.08.28"]
[PlyCount "68"]

1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Qe2 Bxb5 5.Qxb5+ Qd7 6.Qxd7+ Nxd7 7.c4 g6 8.
Nc3 Ngf6 9.d3 Bg7 10.h3 O-O 11.Be3 Rfc8 12.Ke2 Nb8 13.Rab1 Nc6 14.a3 Nd7 
15.Rhc1 a6 16.b4 Nd4+ 17.Bxd4 cxd4 18.Nd1 e6 19.a4 a5 20.b5 Nc5 21.Nb2 f5 
22.exf5 gxf5 23.g4 fxg4 24.hxg4 Rf8 25.Rg1 d5 26.Rbc1 Rac8 27.Rg3 e5 28.
Nh4 Bf6 29.Nf5 Bg5 30.Rh1 dxc4 31.Nxc4 e4 32.Ncd6 Nxd3 33.Nxc8 Nf4+ 34.Kd1
Rxc8 1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.31"]
[Round "4"]
[White "Czerniak, Moshe"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[ECO "C47"]
[EventDate "1963.08.28"]
[PlyCount "68"]

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 exd4 5.Nxd4 Bb4 6.Nxc6 bxc6 7.Bd3 d5 8.
exd5 Qe7+ 9.Qe2 cxd5 10.Qxe7+ Kxe7 11.O-O Rd8 12.a3 Bc5 13.b4 Bd4 14.Bd2 
Bb7 15.Rae1+ Kf8 16.Nb5 Bb6 17.Bf4 Ne8 18.Bxh7 d4 19.a4 a5 20.Bg5 Nf6 21.
Bxf6 gxf6 22.bxa5 Rxa5 23.Be4 Bxe4 24.Rxe4 c6 25.Na3 Rxa4 26.Nb1 Ra2 27.
Rc1 Ba5 28.Kf1 c5 29.Re2 Ra1 30.Ree1 Bxe1 31.Rxe1 Ra2 32.c3 Rb8 33.cxd4 
cxd4 34.Rd1 Rbb2 0-1

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.31"]
[Round "4"]
[White "Langeweg, Christian"]
[Black "Donner, Jan"]
[Result "1-0"]
[ECO "D43"]
[EventDate "1963.08.28"]
[PlyCount "81"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c6 5.Bg5 h6 6.Bxf6 Qxf6 7.Qb3 dxc4 8.Qxc4 
Nd7 9.e3 Bd6 10.Ne4 Qe7 11.Nxd6+ Qxd6 12.Be2 O-O 13.Qc3 b6 14.O-O Bb7 15.
Rfd1 Rac8 16.b4 Rc7 17.Nd2 c5 18.dxc5 bxc5 19.b5 Nb6 20.Nc4 Qe7 21.f3 Nd5 
22.Qd2 e5 23.Na5 Ba8 24.Bc4 Nb6 25.Qd6 Qxd6 26.Rxd6 Rfc8 27.Rad1 Kf8 28.e4
Ke7 29.Kf2 Rb8 30.R6d2 g6 31.Bb3 c4 32.Rc1 Rc5 33.Nxc4 Nxc4 34.Bxc4 f5 35.
exf5 gxf5 36.Rdc2 e4 37.Be2 Rxc2 38.Rxc2 exf3 39.gxf3 Kd6 40.Ke3 Rg8 41.
Kf4 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.31"]
[Round "4"]
[White "Milic, Borislav"]
[Black "De Rooi, Paul"]
[Result "1-0"]
[ECO "B32"]
[EventDate "1963.08.28"]
[PlyCount "83"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5 5.Nb5 a6 6.Nd6+ Bxd6 7.Qxd6 Qf6 8.
Qd1 Qg6 9.Nc3 Nge7 10.Be3 O-O 11.a3 d5 12.exd5 Nd4 13.Bxd4 exd4 14.Qxd4 
Qxc2 15.Bd3 Qxb2 16.O-O Nf5 17.Qc5 Qd2 18.Rfd1 Qf4 19.Rab1 b5 20.Rbc1 Bd7 
21.Ne2 Qg5 22.Qb4 Rfc8 23.f4 Qd8 24.Rxc8 Rxc8 25.Bxf5 Bxf5 26.h3 Rc4 27.
Qe1 Qd6 28.Ng3 Bd7 29.Qe5 Qxa3 30.Kh2 f6 31.Qb8+ Rc8 32.Qb6 Qb3 33.Rd2 Qc3
34.Ra2 Qc4 35.Rxa6 Qxd5 36.Qd6 Bc6 37.Qxd5+ Bxd5 38.Nf5 Rc7 39.Rb6 Rb7 40.
Rd6 g6 41.Rd8+ Kf7 42.Nd6+ 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.08.31"]
[Round "4"]
[White "Udovcic, Mijo"]
[Black "Kuijpers, Franciscus"]
[Result "1-0"]
[ECO "E66"]
[EventDate "1963.08.28"]
[PlyCount "77"]

1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 O-O 5.Bg2 d6 6.O-O Nc6 7.Nc3 a6 8.d5 Na5 
9.Nd2 c5 10.Qc2 Rb8 11.b3 b5 12.Bb2 Bh6 13.e3 Nd7 14.Nd1 f6 15.Rb1 Nb6 16.
Bc3 Nb7 17.f4 Qe8 18.Nf2 e5 19.dxe6 Bxe6 20.Qd3 Bf5 21.e4 Be6 22.Nd1 Bg7 
23.Ne3 Kh8 24.Rbe1 Qd7 25.f5 Bg8 26.Nd5 Nxd5 27.exd5 g5 28.Ne4 b4 29.Ba1 
h6 30.g4 Rbe8 31.Qg3 Qd8 32.h4 Rf7 33.Bf3 Kh7 34.Rf2 gxh4 35.Qxh4 Ref8 36.
Rh2 Rd7 37.g5 fxg5 38.Nxg5+ Kh8 39.Qxh6+ 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.02"]
[Round "5"]
[White "De Rooi, Paul"]
[Black "Langeweg, Christian"]
[Result "0-1"]
[ECO "B20"]
[EventDate "1963.08.28"]
[PlyCount "88"]

1.e4 c5 2.Ne2 Nf6 3.Nbc3 d6 4.g3 Nc6 5.Bg2 g6 6.d3 Bg7 7.Nf4 Bg4 8.f3 Bd7 
9.g4 e5 10.Nfe2 h5 11.g5 Nh7 12.h4 f6 13.Nd5 fxg5 14.hxg5 O-O 15.Be3 Nd4 
16.f4 Bg4 17.Bxd4 cxd4 18.Qd2 exf4 19.Nexf4 Qxg5 20.O-O Rf7 21.Qb4 Be5 22.
Qb3 Qh4 23.Rf2 Raf8 24.Ne7+ Qxe7 25.Nxg6 Qe6 26.Nxf8 Nxf8 27.Rxf7 Qxf7 28.
Qxf7+ Kxf7 29.Rf1+ Ke7 30.Bf3 Bh3 31.Bg2 Be6 32.Bf3 h4 33.Bh5 Nh7 34.Bg6 
Ng5 35.Bf5 Nh3+ 36.Kg2 Nf4+ 37.Kf3 Bxf5 38.exf5 Kf6 39.Kg4 h3 40.Rh1 b5 
41.b4 a6 42.a3 d5 43.Ra1 h2 44.Rh1 Ne2 0-1

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.02"]
[Round "5"]
[White "Donner, Jan"]
[Black "Czerniak, Moshe"]
[Result "1/2-1/2"]
[ECO "E92"]
[EventDate "1963.08.28"]
[PlyCount "81"]

1.d4 Nf6 2.c4 c5 3.d5 g6 4.Nc3 d6 5.e4 Bg7 6.Be2 O-O 7.Nf3 e5 8.Bg5 h6 9.
Bh4 Nbd7 10.O-O g5 11.Bg3 Nh5 12.Ne1 Nf4 13.Bg4 Nb6 14.Bxc8 Nxc8 15.Nc2 
Ne7 16.Ne3 Qd7 17.f3 f5 18.Bf2 Rf7 19.Qc2 fxe4 20.Nxe4 Nf5 21.Nxf5 Qxf5 
22.Rae1 Raf8 23.Be3 Qg6 24.Rf2 h5 25.Kh1 g4 26.fxg4 hxg4 27.Ref1 Bh6 28.
Ng3 Qxc2 29.Rxc2 Ne2 30.Rxf7 Nxg3+ 31.hxg3 Kxf7 32.Bxh6 Rh8 33.Rf2+ Kg6 
34.Kg1 Rxh6 35.Rf8 Kg5 36.Rf7 b6 37.Rxa7 Kf5 38.Re7 Rh8 39.Rd7 Rh6 40.Re7 
Rh8 41.Rd7 1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.02"]
[Round "5"]
[White "Kuijpers, Franciscus"]
[Black "Barendregt, Johan"]
[Result "1-0"]
[ECO "B03"]
[EventDate "1963.08.28"]
[PlyCount "82"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.exd6 exd6 6.Nf3 Be7 7.Bd3 Nc6 8.Nc3 
Bg4 9.Be3 Bf6 10.Be2 O-O 11.b3 d5 12.c5 Nc8 13.h3 Bf5 14.Qd2 Re8 15.O-O h6
16.a3 N8e7 17.Rad1 Be4 18.Ne1 Nf5 19.Nxe4 Rxe4 20.Bd3 Nxe3 21.fxe3 Re8 22.
Nf3 Qe7 23.Rde1 Rad8 24.b4 Bg5 25.Nxg5 Qxg5 26.Bc2 Re6 27.Rf5 Qg3 28.Rf3 
Qg5 29.b5 Ne7 30.Qf2 Rf6 31.Rxf6 gxf6 32.h4 Qg7 33.Rf1 f5 34.Bxf5 Nxf5 35.
Qxf5 c6 36.Rf4 Kf8 37.bxc6 bxc6 38.Qf6 Re8 39.Qd6+ Kg8 40.Qxc6 Rxe3 41.
Qc8+ Kh7 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.02"]
[Round "5"]
[White "Parma, Bruno"]
[Black "Milic, Borislav"]
[Result "1/2-1/2"]
[ECO "C97"]
[EventDate "1963.08.28"]
[PlyCount "46"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 
9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Bd7 13.Nf1 Rfe8 14.Ne3 g6 15.Bd2 Bf8 
16.b4 cxb4 17.cxb4 exd4 18.Nxd4 Nc6 19.Bc3 Bg7 20.Rc1 Rac8 21.Nb3 Be6 22.
Bb1 Qb8 23.Qe2 Ne5 1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.02"]
[Round "5"]
[White "Portisch, Lajos"]
[Black "Udovcic, Mijo"]
[Result "1/2-1/2"]
[ECO "A38"]
[EventDate "1963.08.28"]
[PlyCount "81"]

1.Nf3 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.O-O d6 6.Nc3 c5 7.d3 Nc6 8.a3 Bg4 
9.Rb1 Qd7 10.b4 Bh3 11.b5 Nd4 12.e3 Nxf3+ 13.Qxf3 b6 14.Bxh3 Qxh3 15.Qg2 
Qd7 16.Bd2 e6 17.e4 Ng4 18.h3 Nh6 19.g4 Kh8 20.f4 f5 21.exf5 gxf5 22.g5 
Nf7 23.Kh1 d5 24.cxd5 exd5 25.Ne2 a6 26.bxa6 Rxa6 27.Bc3 d4 28.Bb2 b5 29.
Ng3 c4 30.dxc4 bxc4 31.Rfd1 Rd6 32.Nh5 c3 33.Ba1 Rc8 34.Rbc1 Qe6 35.Kg1 
Qg6 36.Nxg7 Qxg7 37.Qb7 Rdd8 38.Rd3 Kg8 39.Rcd1 Rb8 40.Qa7 Ra8 41.Qc5 
1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.03"]
[Round "6"]
[White "Barendregt, Johan"]
[Black "Portisch, Lajos"]
[Result "1-0"]
[ECO "C68"]
[EventDate "1963.08.28"]
[PlyCount "81"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Bg4 6.h3 h5 7.d3 Qf6 8.Nbd2 
g5 9.Re1 Be6 10.d4 exd4 11.e5 Qg7 12.Nxd4 O-O-O 13.Nxe6 fxe6 14.Qf3 Bb4 
15.c3 Be7 16.Nb3 Nh6 17.Nd4 Rxd4 18.cxd4 Nf5 19.Qb3 Qg6 20.Be3 g4 21.Kf1 
gxh3 22.gxh3 Nh4 23.Ke2 Qf5 24.Rg1 Rd8 25.Rg3 Qf7 26.Rag1 Nf5 27.Rg6 Rd5 
28.Rg8+ Bd8 29.Qb4 Qd7 30.Bg5 Nxd4+ 31.Kf1 Qh7 32.Qf8 Qd3+ 33.Kg2 Qe4+ 34.
f3 Qe2+ 35.Kh1 Qxf3+ 36.Qxf3 Nxf3 37.Bxd8 Rxd8 38.Rxd8+ Kxd8 39.Rf1 Nxe5 
40.Re1 Nc4 41.b3 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.03"]
[Round "6"]
[White "Czerniak, Moshe"]
[Black "Udovcic, Mijo"]
[Result "1-0"]
[ECO "B20"]
[EventDate "1963.08.28"]
[PlyCount "77"]

1.e4 c5 2.b3 Nc6 3.Bb2 d6 4.g3 Nf6 5.Bg2 g6 6.Ne2 Bg7 7.O-O O-O 8.Na3 Bg4 
9.f3 Bd7 10.Nc4 b5 11.Ne3 Qb6 12.Kh1 a5 13.d4 cxd4 14.Nxd4 Rac8 15.c4 bxc4
16.Nxc4 Qa6 17.Rf2 a4 18.Bf1 Nxd4 19.Bxd4 Qb7 20.bxa4 Nxe4 21.Rb2 Rxc4 22.
Rxb7 Rxd4 23.fxe4 Rxd1 24.Rxd1 Bxa4 25.Rc1 Bf6 26.Ra7 Bg5 27.Rc3 Bd1 28.
Rca3 f5 29.h4 Bf6 30.exf5 Rc8 31.fxg6 hxg6 32.Bg2 Rc1 33.Kh2 Rc2 34.Kh3 
Rd2 35.Be4 Kf7 36.Rd3 Rxd3 37.Bxd3 Bd4 38.Rb7 Bf3 39.Rb1 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.03"]
[Round "6"]
[White "Donner, Jan"]
[Black "De Rooi, Paul"]
[Result "1-0"]
[ECO "E66"]
[EventDate "1963.08.28"]
[PlyCount "57"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.Nc3 Nc6 7.d5 Na5 8.b3 c5 9.
Bb2 a6 10.O-O Rb8 11.Nd2 b5 12.Qc2 bxc4 13.bxc4 Bh6 14.f4 e5 15.Rae1 exf4 
16.gxf4 Nh5 17.e3 Bf5 18.Nce4 Re8 19.Bc3 Bxe4 20.Bxe4 f5 21.Bf3 Nxf4 22.
exf4 Rxe1 23.Rxe1 Bxf4 24.Re2 Qg5+ 25.Kh1 Be3 26.Bg2 Nb7 27.Qb1 Bf4 28.Nf3
Qh5 29.Rb2 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.03"]
[Round "6"]
[White "Langeweg, Christian"]
[Black "Parma, Bruno"]
[Result "1/2-1/2"]
[ECO "D40"]
[EventDate "1963.08.28"]
[PlyCount "37"]

1.c4 c5 2.Nc3 Nf6 3.Nf3 Nc6 4.e3 e6 5.d4 d5 6.a3 a6 7.Bd3 Be7 8.O-O O-O 9.
dxc5 Bxc5 10.b4 Ba7 11.Bb2 dxc4 12.Bxc4 b5 13.Bd3 Bb7 14.Ne4 Nxe4 15.Bxe4 
Qxd1 16.Rfxd1 Rfd8 17.Kf1 f6 18.Nd4 Nxd4 19.Bxd4 1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.03"]
[Round "6"]
[White "Milic, Borislav"]
[Black "Kuijpers, Franciscus"]
[Result "1/2-1/2"]
[ECO "B49"]
[EventDate "1963.08.28"]
[PlyCount "83"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 a6 6.Be3 Qc7 7.a3 Nf6 8.Be2 
Be7 9.f4 d6 10.O-O O-O 11.Qe1 Bd7 12.Qg3 Kh8 13.Kh1 Rac8 14.Rad1 b5 15.
Nxc6 Bxc6 16.Bd4 Qb7 17.Bd3 a5 18.Rde1 b4 19.axb4 axb4 20.Nd1 Bb5 21.Ne3 
Bxd3 22.cxd3 Qb5 23.Rd1 Rc6 24.b3 Ra6 25.Nc4 d5 26.Bxf6 Bxf6 27.e5 Be7 28.
Nd2 f5 29.exf6 Bxf6 30.f5 e5 31.Nf3 d4 32.Rfe1 Qd7 33.Nxe5 Qd5 34.Qf3 Ra5 
35.Qxd5 Rxd5 36.Nf3 Rxf5 37.h3 Rc5 38.Re4 Rd8 39.Rde1 Kg8 40.Re8+ Rxe8 41.
Rxe8+ Kf7 42.Rb8 1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.04"]
[Round "7"]
[White "De Rooi, Paul"]
[Black "Czerniak, Moshe"]
[Result "1-0"]
[ECO "E70"]
[EventDate "1963.08.28"]
[PlyCount "87"]

1.c4 Nf6 2.Nc3 g6 3.d4 c5 4.d5 Bg7 5.e4 d6 6.Bd3 O-O 7.Nge2 e5 8.Bg5 h6 9.
Bh4 Nbd7 10.f3 Re8 11.g4 Nf8 12.Bf2 g5 13.h4 Ng6 14.hxg5 hxg5 15.Qd2 Nf4 
16.O-O-O a6 17.Ng3 Bd7 18.Rh2 b5 19.Rdh1 Rb8 20.Nd1 bxc4 21.Bb1 Rb4 22.Ne3
Qb6 23.Be1 Rb8 24.a3 Ra4 25.Qd1 Nd3+ 26.Bxd3 cxd3 27.Qxd3 c4 28.Qc3 Qc5 
29.Rc2 Bb5 30.Nef5 Bd7 31.Bf2 Qc7 32.Be3 Nh7 33.Ne7+ Kf8 34.Rxh7 Bf6 35.
Ngf5 Bxf5 36.Nxf5 Ke8 37.Nh6 Qd8 38.Nxf7 Qe7 39.Nxg5 Qf8 40.Nf7 Bg7 41.
Rxg7 Qxg7 42.Nxd6+ Kf8 43.Rh2 Kg8 44.Nf5 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.04"]
[Round "7"]
[White "Kuijpers, Franciscus"]
[Black "Langeweg, Christian"]
[Result "1-0"]
[ECO "B49"]
[EventDate "1963.08.28"]
[PlyCount "113"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 a6 6.Be3 Qc7 7.a3 Nf6 8.Be2 
Bd6 9.h3 O-O 10.O-O Bf4 11.Qd2 Bxe3 12.Qxe3 d6 13.Rad1 Rd8 14.Nb3 b5 15.f4
Bb7 16.Bf3 Nd7 17.f5 Qb6 18.Qxb6 Nxb6 19.fxe6 fxe6 20.e5 d5 21.Nc5 Bc8 22.
Bg4 Re8 23.Rfe1 Nc4 24.Nd3 Ra7 25.Nb1 Rc7 26.Nd2 Nxd2 27.Rxd2 Na5 28.c3 
Nc4 29.Rde2 Ree7 30.Nc1 Bd7 31.Nb3 Be8 32.Nd4 Bf7 33.h4 Rb7 34.Ra1 Rb6 35.
Kh2 Bg6 36.b3 Na5 37.Rc1 h6 38.Rf2 Be4 39.Rcf1 Nc6 40.Bxe6+ Kh7 41.Rf8 
Nxe5 42.Bg8+ Kg6 43.Ne2 Nd3 44.g4 Rf6 45.Kg3 Rxf1 46.Rxf1 h5 47.g5 Bf5 48.
Nd4 Bg4 49.Rf8 Nc1 50.Bxd5 Ne2+ 51.Nxe2 Bxe2 52.Kf4 Bd3 53.Rc8 Re1 54.Rc6+
Kh7 55.Rxa6 Rg1 56.Ra8 Rg4+ 57.Ke3 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.04"]
[Round "7"]
[White "Parma, Bruno"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "C47"]
[EventDate "1963.08.28"]
[PlyCount "29"]

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.d4 exd4 5.Nxd4 Bb4 6.Nxc6 bxc6 7.Bd3 O-O 8.
O-O d6 9.Bg5 Qe7 10.f4 d5 11.exd5 Bxc3 12.bxc3 Qc5+ 13.Kh1 Nxd5 14.f5 Qxc3
15.Qe1 1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.04"]
[Round "7"]
[White "Portisch, Lajos"]
[Black "Milic, Borislav"]
[Result "1/2-1/2"]
[ECO "E90"]
[EventDate "1963.08.28"]
[PlyCount "85"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Bg5 h6 7.Bh4 c6 8.Be2 g5 9.
Bg3 Nxe4 10.Nxe4 f5 11.Nexg5 hxg5 12.Nxg5 Qa5+ 13.Kf1 f4 14.Bh4 Bf5 15.g4 
fxg3 16.hxg3 Nd7 17.g4 Bg6 18.Ne6 Rf7 19.Bd3 Bxd3+ 20.Qxd3 Nf8 21.Nxg7 
Rxg7 22.Re1 Ng6 23.Bg3 Rf8 24.c5 Qxa2 25.cxd6 exd6 26.d5 Qxd5 27.Qxd5+ 
cxd5 28.Bxd6 Rd8 29.Bg3 d4 30.Ke2 Nf8 31.f3 Rf7 32.f4 Rc7 33.f5 Rc2+ 34.
Kd3 Rxb2 35.Be5 Rb3+ 36.Ke4 d3 37.g5 d2 38.Reg1 Rb4+ 39.Kf3 Rd3+ 40.Ke2 
d1=Q+ 41.Rxd1 Rxd1 42.Rh8+ Kf7 43.Kxd1 1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.04"]
[Round "7"]
[White "Udovcic, Mijo"]
[Black "Barendregt, Johan"]
[Result "1-0"]
[ECO "A46"]
[EventDate "1963.08.28"]
[PlyCount "51"]

1.d4 d6 2.Nf3 Nf6 3.g3 Bf5 4.Bg2 c6 5.O-O Nbd7 6.c4 e5 7.Nc3 Be7 8.Re1 O-O
9.e4 Bg4 10.d5 cxd5 11.cxd5 Nxe4 12.Rxe4 f5 13.Rxg4 fxg4 14.Nd2 Bg5 15.
Qxg4 Rxf2 16.Kxf2 Qb6+ 17.Ke2 Qe3+ 18.Kd1 Nc5 19.Qe2 Qg1+ 20.Qf1 Qd4 21.
Nb5 Qa4+ 22.b3 Qb4 23.Qc4 Qa5 24.Nxd6 Rf8 25.b4 Qa4+ 26.Ke2 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.05"]
[Round "8"]
[White "Czerniak, Moshe"]
[Black "Barendregt, Johan"]
[Result "1-0"]
[ECO "A04"]
[EventDate "1963.08.28"]
[PlyCount "51"]

1.e4 c5 2.Nf3 g6 3.g3 Bg7 4.Bg2 Nf6 5.d3 Nc6 6.O-O d5 7.Nbd2 O-O 8.c3 e6 
9.Re1 Rb8 10.a4 d4 11.Nc4 dxc3 12.bxc3 Na5 13.Bf4 Ra8 14.Bd6 Re8 15.Bxc5 
Nxc4 16.dxc4 Qxd1 17.Raxd1 Nd7 18.Bd6 Bxc3 19.Re3 Ba5 20.c5 Nb8 21.Ne5 Nc6
22.Nxc6 bxc6 23.e5 Bd7 24.Rb1 Rec8 25.Rb7 Be8 26.Re7 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.05"]
[Round "8"]
[White "De Rooi, Paul"]
[Black "Parma, Bruno"]
[Result "1/2-1/2"]
[ECO "A34"]
[EventDate "1963.08.28"]
[PlyCount "56"]

1.c4 Nf6 2.Nc3 c5 3.Nf3 g6 4.g3 Bg7 5.Bg2 O-O 6.d4 Nc6 7.dxc5 Qa5 8.O-O 
Qxc5 9.b3 d6 10.Bb2 Qh5 11.Qd2 Bh6 12.Qe1 Be6 13.Rd1 Qa5 14.Nd4 Nxd4 15.
Rxd4 Qb6 16.Nd5 Bxd5 17.Bxd5 Bg7 18.Qd2 Rac8 19.Bg2 Qa6 20.Rd3 Rc7 21.e4 
b5 22.e5 dxe5 23.cxb5 Qxb5 24.a4 Qa6 25.Bxe5 Ne4 26.Bxe4 Bxe5 27.Bd5 Kg7 
28.Bc4 Qb6 1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.05"]
[Round "8"]
[White "Donner, Jan"]
[Black "Kuijpers, Franciscus"]
[Result "1-0"]
[ECO "E68"]
[EventDate "1963.08.28"]
[PlyCount "87"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nc3 d6 6.Nf3 Nbd7 7.O-O e5 8.e4 c6 
9.b3 exd4 10.Nxd4 Nc5 11.Bb2 Re8 12.Qc2 Qb6 13.Rad1 Bg4 14.f3 Bd7 15.Qf2 
Rad8 16.h3 Bc8 17.Nc2 a5 18.Bc1 Qc7 19.Nd4 Qe7 20.Rde1 Nfd7 21.Kh2 Qf6 22.
Qc2 Nf8 23.Be3 Nfe6 24.Nce2 h6 25.Qd2 h5 26.Qxa5 h4 27.g4 Qe7 28.Kh1 Nxd4 
29.Nxd4 Ne6 30.Nxe6 Bxe6 31.f4 Qf6 32.Qd2 Ra8 33.a4 Bf8 34.Bd4 Qe7 35.Bb2 
f6 36.Qf2 g5 37.e5 fxe5 38.fxe5 dxe5 39.Bxe5 Bg7 40.Qb2 Bxe5 41.Qxe5 Qg7 
42.a5 Rac8 43.Qc5 Rc7 44.Re5 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.05"]
[Round "8"]
[White "Langeweg, Christian"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[ECO "E12"]
[EventDate "1963.08.28"]
[PlyCount "46"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.Bg5 h6 6.Bh4 g5 7.Bg3 Nh5 8.Be5 f6 
9.Qc2 fxe5 10.Qg6+ Ke7 11.Qxh5 exd4 12.Nxd4 Bg7 13.e3 Nc6 14.O-O-O Nxd4 
15.exd4 Qf8 16.Rd2 Qf4 17.Qd1 Raf8 18.f3 h5 19.Be2 g4 20.Kb1 gxf3 21.Bxf3 
Bxf3 22.gxf3 Qxf3 23.Re2 Bxd4 0-1

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.05"]
[Round "8"]
[White "Milic, Borislav"]
[Black "Udovcic, Mijo"]
[Result "0-1"]
[ECO "B06"]
[EventDate "1963.08.28"]
[PlyCount "62"]

1.e4 g6 2.d4 Bg7 3.Nf3 d6 4.Bc4 Nc6 5.c3 Nf6 6.Qe2 O-O 7.e5 Ne8 8.Bf4 Bg4 
9.Nbd2 d5 10.Bd3 f6 11.h3 Bxf3 12.Nxf3 fxe5 13.Bxe5 Bxe5 14.dxe5 e6 15.
O-O-O Ng7 16.h4 Qe7 17.Bc2 Qf7 18.Kb1 Qf4 19.Rh3 Rad8 20.Rdh1 Nh5 21.Ng5 
Qxf2 22.Qg4 Nf4 23.Rf3 Qxg2 24.Qxg2 Nxg2 25.Rg3 Nf4 26.h5 Nxe5 27.hxg6 
hxg6 28.Re1 Nc6 29.Nxe6 Nxe6 30.Bxg6 Ng7 31.Rh1 Rf6 0-1

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.07"]
[Round "9"]
[White "Barendregt, Johan"]
[Black "Milic, Borislav"]
[Result "0-1"]
[ECO "B40"]
[EventDate "1963.08.28"]
[PlyCount "48"]

1.e4 c5 2.Nf3 e6 3.b4 cxb4 4.d4 d6 5.Bd3 Be7 6.e5 dxe5 7.dxe5 Bd7 8.O-O 
Bc6 9.a3 Nd7 10.axb4 Bxb4 11.Na3 Ne7 12.Nc4 Ng6 13.Ng5 Ndxe5 14.Nxe5 Nxe5 
15.Nxe6 fxe6 16.Qh5+ Nf7 17.Rb1 Bc3 18.Rb3 Qf6 19.Ba3 g6 20.Qh3 Bd4 21.Bc4
Ng5 22.Qg3 O-O-O 23.Ba6 Ne4 24.Rxb7 Bxb7 0-1

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.07"]
[Round "9"]
[White "Kuijpers, Franciscus"]
[Black "De Rooi, Paul"]
[Result "1-0"]
[ECO "B24"]
[EventDate "1963.08.28"]
[PlyCount "71"]

1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 Nh6 6.h4 d6 7.Bf4 Ng4 8.f3 Nge5 
9.Qd2 h5 10.Nge2 e6 11.Nd1 d5 12.Nf2 b6 13.O-O d4 14.Bxe5 Nxe5 15.f4 Ng4 
16.Nxg4 hxg4 17.e5 Rb8 18.Nc1 f5 19.exf6 Qxf6 20.Bc6+ Bd7 21.Qg2 Rc8 22.
Bxd7+ Kxd7 23.Nb3 Rh5 24.Nd2 Qf5 25.a4 Qd5 26.Qe2 Qf5 27.Ne4 Bf6 28.b3 Be7
29.Rae1 Rch8 30.Ng5 Re8 31.Nxe6 Rh7 32.Qg2 Rb8 33.Re5 Qf7 34.Ng5 Bxg5 35.
fxg5 Qg8 36.Rf6 1-0

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.07"]
[Round "9"]
[White "Parma, Bruno"]
[Black "Czerniak, Moshe"]
[Result "1/2-1/2"]
[ECO "B77"]
[EventDate "1963.08.28"]
[PlyCount "139"]

1.e4 g6 2.d4 Bg7 3.Nf3 c5 4.Nc3 cxd4 5.Nxd4 Nc6 6.Be3 d6 7.Qd2 Nf6 8.f3 
O-O 9.Bc4 Nxd4 10.Bxd4 Be6 11.Bb3 Qa5 12.O-O-O Rfc8 13.Kb1 Rc6 14.h4 b5 
15.h5 Bxb3 16.cxb3 e5 17.Be3 b4 18.Nd5 Nxd5 19.Qxd5 Qxd5 20.Rxd5 f5 21.
Rhd1 f4 22.Bd2 a5 23.hxg6 hxg6 24.Rc1 Rxc1+ 25.Kxc1 Bf8 26.a3 Kf7 27.Kc2 
Ke6 28.axb4 Rc8+ 29.Kd1 axb4 30.Bxb4 Rb8 31.Bc3 Rxb3 32.Kc2 Rb8 33.b4 Be7 
34.b5 g5 35.Kb3 Bd8 36.Bb4 Bc7 37.Kc4 Rc8 38.Kd3 Rb8 39.Kc2 Rd8 40.Ba3 Rb8
41.Kb3 Rg8 42.Rd1 Rh8 43.Ka4 Ra8+ 44.Kb4 Rh8 45.Kc4 Ra8 46.b6 Rxa3 47.bxc7
Kd7 48.Rxd6+ Kxc7 49.Rg6 Ra2 50.Rxg5 Kd6 51.Rg6+ Ke7 52.Kb3 Rd2 53.Kc3 Ra2
54.Kc4 Kf7 55.Rg4 Rd2 56.Rg5 Kf6 57.Rg4 Ra2 58.Rg8 Kf7 59.Rb8 Rxg2 60.Kd5 
Rg5 61.Rh8 Rg3 62.Kxe5 Rxf3 63.Kf5 Ra3 64.e5 f3 65.Rh7+ Kg8 66.Rh2 Kg7 67.
Rb2 Ra7 68.Ke4 Kf7 69.Rb6 Ra3 70.Rf6+ 1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.07"]
[Round "9"]
[White "Portisch, Lajos"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "A16"]
[EventDate "1963.08.28"]
[PlyCount "23"]

1.Nf3 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.O-O d6 6.Nc3 Nc6 7.d3 Bd7 8.Rb1 a6 
9.b4 b5 10.cxb5 axb5 11.Nxb5 Rxa2 12.Nc3 1/2-1/2

[Event "3rd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1963.09.07"]
[Round "9"]
[White "Udovcic, Mijo"]
[Black "Langeweg, Christian"]
[Result "0-1"]
[ECO "A69"]
[EventDate "1963.08.28"]
[PlyCount "148"]

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.f4 Bg7 8.Nf3 O-O 
9.Be2 Re8 10.e5 dxe5 11.fxe5 Ng4 12.e6 fxe6 13.d6 Ne5 14.Ne4 Nbd7 15.O-O 
Qb6 16.Kh1 Qc6 17.Qc2 Nf7 18.Bf4 b6 19.Rad1 Bb7 20.Nc3 a6 21.Bd3 Nf6 22.
Ng5 c4 23.Be4 Nxe4 24.Ngxe4 b5 25.a3 Rad8 26.Bg3 a5 27.Bh4 Rd7 28.Bf6 b4 
29.Bxg7 Kxg7 30.Nf6 Red8 31.axb4 axb4 32.Nce4 Nxd6 33.Nxd7 Qxe4 34.Qxe4 
Nxe4 35.Kg1 c3 36.Nc5 Nxc5 37.Rxd8 c2 38.Rb8 b3 39.Kf2 Bd5 40.Ke3 Na4 41.
Ra1 Nxb2 42.g4 Na4 43.Rc1 Nc3 44.Rf1 b2 45.Rxb2 Nd1+ 46.Kd2 Nxb2 47.Kxc2 
Nc4 48.Kc3 Ne3 49.Rf4 Kh6 50.Kd4 Ng2 51.Rf7 Kg5 52.Rxh7 Kxg4 53.Ke5 Kg5 
54.Rh8 Nh4 55.Kd4 Nf3+ 56.Ke3 Kg4 57.Rh6 g5 58.Rh8 Nh4 59.Kd4 Kf4 60.Kd3 
Bf3 61.Kd2 e5 62.Rb8 e4 63.Rb4 Bg4 64.Ke1 Nf3+ 65.Kf2 Nxh2 66.Kg2 Nf3 67.
Ra4 Nh4+ 68.Kh2 Kf3 69.Ra5 Kf2 70.Ra2+ Be2 71.Ra5 e3 72.Kh3 Bf1+ 73.Kg4 
Nf3 74.Ra3 Bg2 0-1

