[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.14"]
[Round "1"]
[White "Dunkelblum, Arthur"]
[Black "Hiong Liong Tan"]
[Result "1/2-1/2"]
[ECO "E35"]
[EventDate "1962.08.14"]
[PlyCount "87"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5 6.Bg5 c5 7.dxc5 h6 8.Bxf6 
Qxf6 9.e3 Be6 10.Bb5+ Nc6 11.Ne2 O-O 12.O-O Rac8 13.Na4 Ne5 14.a3 Ba5 15.
b4 Bc7 16.f4 Ng4 17.Qd2 a6 18.Bd3 Rfe8 19.Nac3 Rcd8 20.Nd4 Bc8 21.Rae1 Kf8
22.Bc2 Qh4 23.h3 Nf6 24.Qf2 Qxf2+ 25.Kxf2 h5 26.Rd1 g6 27.Ba4 Re7 28.Rfe1 
Kg7 29.Bb3 Be6 30.Kf3 Bc8 31.Re2 Kh6 32.Kf2 Be6 33.Red2 Rde8 34.Ba4 Rg8 
35.Nf3 Ne4+ 36.Nxe4 dxe4 37.Ng5 Bf5 38.Bb3 Rf8 39.h4 f6 40.Nh3 Bg4 41.Rc1 
Bxh3 42.gxh3 Bxf4 43.Rd5 Be5 44.Rcd1 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.14"]
[Round "1"]
[White "Henneberke, Frans"]
[Black "Kool, Gerard"]
[Result "1/2-1/2"]
[ECO "A47"]
[EventDate "1962.08.14"]
[PlyCount "48"]

1.d4 Nf6 2.Nf3 e6 3.g3 b6 4.Bg2 Bb7 5.O-O Be7 6.b3 O-O 7.Bb2 d5 8.Nbd2 
Nbd7 9.Ne5 Nxe5 10.dxe5 Ne4 11.Nxe4 dxe4 12.Qc1 Bg5 13.e3 c5 14.c4 Qc7 15.
Qd1 Be7 16.Qg4 Qc6 17.Rad1 Rad8 18.Bc3 a6 19.Rxd8 Rxd8 20.Rd1 Rxd1+ 21.
Qxd1 Qc8 22.a3 Qd8 23.Qxd8+ Bxd8 24.h4 h5 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.14"]
[Round "1"]
[White "Kieninger, Georg"]
[Black "Czerniak, Moshe"]
[Result "0-1"]
[ECO "B09"]
[EventDate "1962.08.14"]
[PlyCount "106"]

1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.f4 Nf6 5.Nf3 O-O 6.Bc4 c6 7.e5 Ne8 8.Be3 b5 9.
Bb3 Nc7 10.O-O Nd7 11.Re1 d5 12.Ne2 Nb6 13.c3 Nc4 14.Bc1 a5 15.a4 b4 16.
cxb4 axb4 17.Bc2 Bg4 18.Rf1 Ne6 19.b3 Na5 20.Be3 f5 21.Rc1 Qd7 22.Qd2 Qb7 
23.h3 Bh5 24.Bd1 Rfd8 25.Qb2 Bh6 26.Ne1 c5 27.dxc5 d4 28.Nxd4 Qe4 29.Nec2 
Nxf4 30.Bxf4 Bxf4 31.Rxf4 Qxf4 32.Bxh5 gxh5 33.Rf1 Qxe5 34.Rxf5 Qg7 35.Qa1
Ra6 36.Qf1 Rg6 37.Nf3 e6 38.Rxh5 Qc3 39.Nce1 Qe3+ 40.Kh1 Rf8 41.Qa6 Qf2 
42.Qxa5 Rxf3 43.Qa8+ Rf8 44.Qe4 Qg3 45.Kg1 Qxb3 46.c6 Qxa4 47.Re5 Qa7+ 48.
Kh2 Rf1 49.Qe3 Qc7 50.Nf3 b3 51.Nh4 b2 52.Nxg6 b1=Q 53.Nf4 Qg7 0-1

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.14"]
[Round "1"]
[White "Langeweg, Christian"]
[Black "Heidenfeld, Wolfgang"]
[Result "0-1"]
[ECO "A52"]
[EventDate "1962.08.14"]
[PlyCount "80"]

1.d4 Nf6 2.c4 e5 3.dxe5 Ng4 4.e4 Nxe5 5.Nc3 Bc5 6.Be2 d6 7.Nf3 Nbc6 8.O-O 
O-O 9.Kh1 Nxf3 10.Bxf3 Ne5 11.Be2 Qh4 12.g3 Qh3 13.Nd5 Ng4 14.Bxg4 Bxg4 
15.f3 Be6 16.Nf4 Qh6 17.b4 Qf6 18.Rb1 Bd4 19.Qd3 Rad8 20.Rd1 Be5 21.Nd5 
Bxd5 22.cxd5 Qe7 23.b5 Qd7 24.f4 Bf6 25.Ba3 Rfe8 26.Rbc1 Ra8 27.Rb1 h6 28.
Rdc1 Bd8 29.Bb2 a6 30.a4 axb5 31.axb5 b6 32.Ra1 Rxa1 33.Rxa1 Bf6 34.Bxf6 
gxf6 35.Kg2 Kg7 36.Ra7 Re7 37.f5 Qe8 38.Kf3 c5 39.Ra6 Rb7 40.Qc3 Qxb5 0-1

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.14"]
[Round "1"]
[White "Rellstab, Ludwig"]
[Black "Hartoch, Robert"]
[Result "1-0"]
[ECO "E67"]
[EventDate "1962.08.14"]
[PlyCount "81"]

1.d4 Nf6 2.c4 d6 3.Nc3 Nbd7 4.Nf3 g6 5.g3 Bg7 6.Bg2 O-O 7.O-O e5 8.b3 Re8 
9.e4 exd4 10.Nxd4 Nc5 11.f3 a5 12.Be3 h6 13.Qd2 Kh7 14.Rad1 Bd7 15.Ndb5 
Bxb5 16.Nxb5 Ne6 17.Rfe1 Nd7 18.f4 Nec5 19.Qc2 Qc8 20.Bf2 Na6 21.Bh3 Re7 
22.Qd2 Qf8 23.Bxd7 Rxd7 24.c5 Rad8 25.c6 bxc6 26.Na7 d5 27.e5 Nc5 28.Nxc6 
Ra8 29.Qc2 Ne6 30.Rc1 a4 31.b4 Qc8 32.Red1 Qa6 33.Qd3 Qb7 34.a3 Bf8 35.h4 
Ng7 36.Qf3 Qb5 37.Nd4 Qb7 38.g4 Ne6 39.f5 Nxd4 40.Bxd4 Bg7 41.h5 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.14"]
[Round "1"]
[White "Van den Berg, Carel"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "C96"]
[EventDate "1962.08.14"]
[PlyCount "62"]

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.h3 Na5 10.Bc2 c5 11.d4 Nd7 12.Nbd2 cxd4 13.cxd4 Bf6 14.Nf1 Nc6 15.Be3 
exd4 16.Nxd4 Nde5 17.Rc1 Bb7 18.b3 g6 19.Bb1 Rc8 20.Qd2 Re8 21.Rcd1 Nxd4 
22.Bxd4 Qc7 23.Ne3 h5 24.Kh1 Nd7 25.f3 Bh4 26.Rf1 Nf8 27.Bb2 Qb6 28.Nd5 
Bxd5 29.Qxd5 Rcd8 30.f4 Qc5 31.Qb7 Re7 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.15"]
[Round "2"]
[White "Czerniak, Moshe"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[ECO "B30"]
[EventDate "1962.08.14"]
[PlyCount "40"]

1.e4 c5 2.Nf3 Nc6 3.g3 g6 4.Bg2 Bg7 5.O-O e5 6.d3 Nge7 7.Bg5 d6 8.Qd2 h6 
9.Be3 f5 10.c3 g5 11.exf5 Nxf5 12.Na3 O-O 13.Nc2 Qe8 14.Qe2 b6 15.Nd2 Be6 
16.Rae1 Qd7 17.f4 Nxe3 18.Qxe3 gxf4 19.gxf4 Rae8 20.fxe5 Rxf1+ 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.15"]
[Round "2"]
[White "Donner, Jan"]
[Black "Kool, Gerard"]
[Result "1-0"]
[ECO "E30"]
[EventDate "1962.08.14"]
[PlyCount "51"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 h6 5.Bh4 c5 6.d5 exd5 7.cxd5 d6 8.e3 Bf5 
9.f3 Nbd7 10.e4 Bh7 11.Bd3 a6 12.Ne2 Qc7 13.O-O Bxc3 14.bxc3 b5 15.a4 Rb8 
16.axb5 axb5 17.Ra6 Rb6 18.Rxb6 Qxb6 19.Qb1 b4 20.cxb4 Nxd5 21.bxc5 Qxb1 
22.Bxb1 Ne3 23.Rc1 Ne5 24.Bf2 N5c4 25.Bxe3 Nxe3 26.Kf2 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.15"]
[Round "2"]
[White "Hartoch, Robert"]
[Black "Kieninger, Georg"]
[Result "0-1"]
[ECO "B80"]
[EventDate "1962.08.14"]
[PlyCount "84"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.g3 Nc6 7.Be3 d5 8.Bg2 Bb4
9.Nxc6 bxc6 10.e5 Nd7 11.Qg4 Bf8 12.f4 Rb8 13.O-O-O Qa5 14.f5 Nxe5 15.Qa4 
Qxa4 16.Nxa4 exf5 17.Bf4 Bd6 18.Rhe1 f6 19.c4 Ke7 20.cxd5 c5 21.Rd2 Rb4 
22.Nc3 Ba6 23.Bf1 Bxf1 24.Rxf1 g6 25.Re1 Kd7 26.Ree2 Rhb8 27.a3 Rd4 28.a4 
a6 29.Kb1 Rdb4 30.Ka2 Rd4 31.Rc2 Rc8 32.Be3 Rd3 33.Bf4 Rf3 34.Rf2 Rxf2 35.
Rxf2 Nd3 36.Rf3 Nb4+ 37.Kb1 Be5 38.Bxe5 fxe5 39.g4 f4 40.Rh3 Rh8 41.g5 c4 
42.Rf3 Kd6 0-1

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.15"]
[Round "2"]
[White "Heidenfeld, Wolfgang"]
[Black "Henneberke, Frans"]
[Result "0-1"]
[ECO "C50"]
[EventDate "1962.08.14"]
[PlyCount "134"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Be7 4.d4 d6 5.Nc3 Nf6 6.d5 Nb8 7.O-O O-O 8.Ne1 a6 
9.a4 Bg4 10.Be2 Bxe2 11.Qxe2 Ne8 12.Nd3 Nd7 13.f4 exf4 14.Bxf4 Bf6 15.Nd1 
g6 16.c3 Qe7 17.N1f2 Bg7 18.Rae1 f5 19.Qc2 Qf7 20.Qb3 b6 21.Nh3 h6 22.exf5
Qxf5 23.Rf3 Qh5 24.Rfe3 a5 25.Bg3 g5 26.Qc4 Bf6 27.Nhf2 Rc8 28.Qc6 Nb8 29.
Qc4 Ng7 30.Ng4 Qg6 31.Rf1 h5 32.Nxf6+ Rxf6 33.Rxf6 Qxf6 34.Qe4 Qf5 35.Be1 
Rf8 36.Qxf5 Nxf5 37.Re6 Kf7 38.Bd2 Rg8 39.Nf2 Ng7 40.Re2 Nf5 41.Nh3 g4 42.
Ng5+ Kf6 43.Re6+ Kg7 44.c4 Nd7 45.Bc3+ Kf8 46.Nh7+ Kf7 47.Nf6 Nc5 48.Nxg8 
Nxe6 49.dxe6+ Kxg8 50.Bf6 Ng7 51.e7 Ne8 52.Bg5 Kf7 53.Kf2 Ng7 54.Ke3 Nf5+ 
55.Ke4 Nxe7 56.h3 gxh3 57.gxh3 Ke6 58.Bd2 Nc6 59.Bc3 Ne5 60.b3 Nd7 61.b4 
axb4 62.Bxb4 Ne5 63.a5 bxa5 64.Bxa5 c5 65.Kf4 Nxc4 66.Bc3 d5 67.Be1 d4 0-1

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.15"]
[Round "2"]
[White "Hiong Liong Tan"]
[Black "Rellstab, Ludwig"]
[Result "1/2-1/2"]
[ECO "A30"]
[EventDate "1962.08.14"]
[PlyCount "64"]

1.Nf3 Nf6 2.c4 c5 3.g3 b6 4.Bg2 Bb7 5.O-O Nc6 6.Nc3 g6 7.e4 Bg7 8.Rb1 O-O 
9.a3 Ne8 10.b4 d6 11.Nd5 e6 12.Nf4 Nc7 13.d3 Qe8 14.Be3 Nd4 15.bxc5 dxc5 
16.Nxd4 cxd4 17.Bd2 Na6 18.Re1 Qd7 19.h4 Nc5 20.Bb4 Rfc8 21.h5 Qd8 22.hxg6
hxg6 23.Qe2 Bc6 24.Nh3 e5 25.Bd2 Bd7 26.Kh2 Rab8 27.f4 b5 28.cxb5 Bxb5 29.
Nf2 Bd7 30.Bh3 Bxh3 31.Nxh3 Rxb1 32.Rxb1 Rb8 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.15"]
[Round "2"]
[White "Van den Berg, Carel"]
[Black "Dunkelblum, Arthur"]
[Result "1/2-1/2"]
[ECO "B18"]
[EventDate "1962.08.14"]
[PlyCount "50"]

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.Bc4 Nf6 7.N1e2 e6 8.Nf4 
Bd6 9.Bb3 Qc7 10.Qf3 Nd5 11.Nxg6 hxg6 12.Ne4 Be7 13.h3 Nd7 14.O-O O-O 15.
c4 N5f6 16.Nc3 Rad8 17.Re1 Rfe8 18.Bf4 Bd6 19.Bg5 Be7 20.Rad1 a6 21.d5 Nc5
22.Bf4 Bd6 23.Bxd6 Rxd6 24.Bc2 cxd5 25.cxd5 Qb6 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.16"]
[Round "3"]
[White "Dunkelblum, Arthur"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "D55"]
[EventDate "1962.08.14"]
[PlyCount "41"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 O-O 6.e3 Ne4 7.Bxe7 Qxe7 8.Qc2 
Nxc3 9.Qxc3 c6 10.Be2 dxc4 11.Bxc4 b6 12.O-O Bb7 13.Be2 Nd7 14.Rac1 Rfc8 
15.Rfd1 c5 16.Qa3 Rc7 17.dxc5 Nxc5 18.b4 Ne4 19.Rxc7 Qxc7 20.Rc1 Qe7 21.
Qb2 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.16"]
[Round "3"]
[White "Henneberke, Frans"]
[Black "Czerniak, Moshe"]
[Result "0-1"]
[ECO "A65"]
[EventDate "1962.08.14"]
[PlyCount "96"]

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Bd3 Bg7 8.Nge2 O-O
9.O-O Na6 10.Ng3 Nc7 11.h3 Rb8 12.a4 b6 13.Be3 a6 14.Qd2 Re8 15.Bg5 b5 16.
Qf4 c4 17.Bc2 b4 18.Nd1 b3 19.Bb1 Qe7 20.Ne3 Rb4 21.Rc1 c3 22.Rxc3 h6 23.
Bxf6 Qxf6 24.Qxf6 Bxf6 25.Rc4 Rb7 26.Nd1 Nxd5 27.exd5 Re1+ 28.Kh2 Rxd1 29.
Rxc8+ Kg7 30.Bxg6 Rxa1 31.Bd3 Be5 32.Rc4 Bxg3+ 33.Kxg3 Ra2 34.Rg4+ Kf6 35.
Bxa6 Rb8 36.Bb5 Rxb2 37.Rb4 Rg8+ 38.Kf3 Ke5 39.Bc6 Rg6 40.Re4+ Kf6 41.g3 
Kg7 42.Ke3 Rb1 43.Rb4 Rf6 44.f4 b2 45.Kd2 Rg1 46.Rxb2 Rxg3 47.Rb4 Rxh3 48.
a5 Rg6 0-1

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.16"]
[Round "3"]
[White "Kieninger, Georg"]
[Black "Hiong Liong Tan"]
[Result "1-0"]
[ECO "B45"]
[EventDate "1962.08.14"]
[PlyCount "83"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.g3 Be7 7.Bg2 Nxd4 8.Qxd4
d6 9.O-O O-O 10.Rd1 e5 11.Qd3 Qb6 12.b3 Be6 13.Na4 Qc6 14.c4 a6 15.Nc3 
Rfc8 16.a4 Nd7 17.Be3 Nc5 18.Qc2 b6 19.h3 Rab8 20.Rab1 Nb7 21.Rdc1 Na5 22.
Qd2 Qd7 23.Kh2 Nc6 24.Nd5 Bd8 25.Nc3 Na5 26.Bf1 Kf8 27.Rd1 Nb7 28.Qa2 Qc6 
29.Rbc1 Nc5 30.f3 Nb7 31.Nd5 Nc5 32.Nc3 Nb7 33.Ra1 Na5 34.Rdc1 Qb7 35.Qa3 
Qd7 36.Nd5 Bxd5 37.cxd5 b5 38.axb5 axb5 39.Qb4 Rxc1 40.Rxc1 Ke7 41.f4 exf4
42.Bxf4 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.16"]
[Round "3"]
[White "Kool, Gerard"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "C02"]
[EventDate "1962.08.14"]
[PlyCount "99"]

1.d4 e6 2.e4 d5 3.e5 c5 4.c3 Qb6 5.Nf3 Bd7 6.Bd3 Bb5 7.O-O Bxd3 8.Qxd3 Qa6
9.Qd1 Nd7 10.Be3 Rc8 11.Nbd2 Ne7 12.Nh4 Ng6 13.Qh5 cxd4 14.cxd4 Nxh4 15.
Qxh4 Be7 16.Qg4 g6 17.Bh6 f5 18.exf6 Nxf6 19.Qh3 Rg8 20.Bg5 Rg7 21.Rfe1 
Rc6 22.Re5 Nd7 23.Bh6 Rf7 24.Re3 Bf6 25.Rae1 Re7 26.Nf3 Qb6 27.Bg5 Bxg5 
28.Nxg5 Nf8 29.Qg3 Qc7 30.Qg4 Rc1 31.h4 Rxe1+ 32.Rxe1 Qa5 33.Qe2 Qc7 34.g3
Qd6 35.h5 h6 36.Nf3 Kf7 37.Ne5+ Kg7 38.hxg6 Qb4 39.Rd1 Qa4 40.b3 Qe8 41.
Qh5 Nxg6 42.Ng4 Qh8 43.Rc1 Qh7 44.Rc8 Rf7 45.Ne5 Nxe5 46.Qxe5+ Kg6 47.
Qxe6+ Kh5 48.Qxd5+ Kg4 49.Qe6+ Qf5 50.Rg8+ 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.16"]
[Round "3"]
[White "Langeweg, Christian"]
[Black "Hartoch, Robert"]
[Result "1-0"]
[ECO "E61"]
[EventDate "1962.08.14"]
[PlyCount "53"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 O-O 5.e3 d6 6.Be2 Nbd7 7.O-O e5 8.Qc2 Re8
9.a4 c6 10.a5 Qe7 11.b4 h5 12.Ba3 e4 13.Nd2 Nf8 14.b5 N8h7 15.a6 Ng5 16.
Rfb1 h4 17.axb7 Bxb7 18.bxc6 Bxc6 19.Nb5 Bxb5 20.Rxb5 Bh6 21.Rab1 h3 22.g3
Rac8 23.Ra5 Rb8 24.Rab5 Qc7 25.Qb3 Rxb5 26.Qxb5 Ne6 27.Nxe4 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.16"]
[Round "3"]
[White "Rellstab, Ludwig"]
[Black "Van den Berg, Carel"]
[Result "0-1"]
[ECO "E00"]
[EventDate "1962.08.14"]
[PlyCount "76"]

1.d4 Nf6 2.c4 e6 3.Nd2 c5 4.e3 cxd4 5.exd4 Nc6 6.Ngf3 d5 7.Be2 Be7 8.O-O 
O-O 9.a3 b6 10.cxd5 Qxd5 11.Nb1 Bb7 12.Nc3 Qd6 13.Be3 Rfd8 14.Qc2 Rac8 15.
Rfd1 Ng4 16.Rac1 Na5 17.h3 Nxe3 18.fxe3 Qg3 19.e4 Bf6 20.b4 Nc6 21.e5 Be7 
22.Qe4 Na5 23.Qb1 Nc4 24.Ne4 Qf4 25.Rxc4 Rxc4 26.Bxc4 Bxe4 27.Qb3 g6 28.
Be2 Rc8 29.Bc4 Bxf3 30.gxf3 Qg3+ 31.Kf1 Qxh3+ 32.Ke2 Qg2+ 33.Ke3 Bg5+ 34.
Ke4 Qg3 35.Rf1 Qf4+ 36.Kd3 Qd2+ 37.Ke4 Rxc4 38.Qxc4 Qe3# 0-1

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.17"]
[Round "4"]
[White "Czerniak, Moshe"]
[Black "Kool, Gerard"]
[Result "1-0"]
[ECO "B13"]
[EventDate "1962.08.14"]
[PlyCount "41"]

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.Bd3 Nc6 5.c3 g6 6.Nf3 Bg7 7.O-O Bg4 8.h3 
Bxf3 9.Qxf3 Nf6 10.Re1 O-O 11.Bf4 Rc8 12.Nd2 Na5 13.Qe2 e6 14.Nf3 a6 15.
Ne5 b5 16.a4 Nc4 17.axb5 axb5 18.Ra7 Ra8 19.Nxf7 Qc8 20.Rxa8 Qxa8 21.Ng5 
1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.17"]
[Round "4"]
[White "Donner, Jan"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "D16"]
[EventDate "1962.08.14"]
[PlyCount "81"]

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 e6 6.e3 Bb4 7.Bxc4 Qa5 8.Bd2 
Nbd7 9.e4 e5 10.dxe5 Nxe5 11.Nxe5 Qxe5 12.Qb3 Bxc3 13.Bxc3 Qxe4+ 14.Kf1 
O-O 15.Bb4 Bf5 16.f3 Qf4 17.Bxf8 Rxf8 18.Rd1 Ng4 19.Bxf7+ Kh8 20.g3 Qc7 
21.fxg4 Be4 22.Rg1 Rxf7+ 23.Ke1 Bd5 24.Qd3 Qe5+ 25.Qe2 Qxe2+ 26.Kxe2 Bf3+ 
27.Ke3 Bxd1 28.Rxd1 Re7+ 29.Kf4 Kg8 30.h4 Kf7 31.Rd8 c5 32.Rc8 b6 33.g5 
Ke6 34.h5 Rd7 35.Re8+ Kf7 36.Rc8 Ke6 37.g4 g6 38.h6 Rd4+ 39.Kf3 Rd3+ 40.
Kf4 Rd4+ 41.Kf3 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.17"]
[Round "4"]
[White "Dunkelblum, Arthur"]
[Black "Rellstab, Ludwig"]
[Result "1/2-1/2"]
[ECO "E38"]
[EventDate "1962.08.14"]
[PlyCount "35"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 Na6 6.Bd2 O-O 7.a3 Bxc3 8.Bxc3 
Nxc5 9.Nf3 Re8 10.e3 b6 11.Be2 Bb7 12.O-O Rc8 13.Nd2 d5 14.Qd1 Nce4 15.
Bxf6 Nxf6 16.cxd5 Bxd5 17.Ba6 Rc7 18.Rc1 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.17"]
[Round "4"]
[White "Hartoch, Robert"]
[Black "Henneberke, Frans"]
[Result "1-0"]
[ECO "C87"]
[EventDate "1962.08.14"]
[PlyCount "111"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 d6 7.c3 Bd7 8.d3 O-O 
9.Nbd2 Kh8 10.Nf1 Ng8 11.Ng3 g6 12.d4 Bf6 13.Be3 Qe7 14.h3 Bg7 15.Bc2 Rfe8
16.Qd2 Rad8 17.Rad1 Qf8 18.b3 Bc8 19.Nh2 f6 20.f4 Bh6 21.Rf1 Qg7 22.Rde1 
Rf8 23.Re2 Nge7 24.Ref2 exf4 25.Bxf4 Bxf4 26.Qxf4 a5 27.Ng4 Ng8 28.Ne3 b5 
29.Ne2 Nce7 30.Bd3 c6 31.d5 b4 32.dxc6 Nxc6 33.Nd5 Be6 34.Bb5 Bxd5 35.exd5
Na7 36.Bc4 Rfe8 37.cxb4 axb4 38.Nd4 Qb7 39.Qh4 Rd7 40.Ne6 Rf7 41.Qg3 Nc8 
42.Qd3 Qb6 43.Kh2 Ra7 44.Qd2 h6 45.h4 h5 46.Rxf6 Nxf6 47.Rxf6 Rg8 48.Qh6+ 
Rh7 49.Rxg6 Qf2 50.Rxg8+ Kxg8 51.Qg5+ Kf7 52.Bd3 Ne7 53.Bxh7 Nxd5 54.Bf5 
Ne7 55.Qxh5+ Kf6 56.Qh8+ 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.17"]
[Round "4"]
[White "Hiong Liong Tan"]
[Black "Langeweg, Christian"]
[Result "1-0"]
[ECO "E79"]
[EventDate "1962.08.14"]
[PlyCount "37"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.f4 c5 7.Nf3 cxd4 8.Nxd4 Nc6
9.Be3 Bg4 10.Bxg4 Nxg4 11.Qxg4 Nxd4 12.Qd1 Nc6 13.Rc1 Qa5 14.O-O Rac8 15.
a3 Rfe8 16.Rf2 Nb8 17.b4 Qxa3 18.Ra2 Qxb4 19.Nd5 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.17"]
[Round "4"]
[White "Van den Berg, Carel"]
[Black "Kieninger, Georg"]
[Result "1/2-1/2"]
[ECO "C05"]
[EventDate "1962.08.14"]
[PlyCount "80"]

1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.Bd3 b6 6.Ne2 Ba6 7.Bxa6 Nxa6 8.O-O 
c5 9.c3 g6 10.f4 Qc7 11.g4 O-O-O 12.f5 gxf5 13.gxf5 Bh6 14.Nf3 Rdg8+ 15.
Kh1 Bxc1 16.Rxc1 Qc6 17.Qd2 Nc7 18.f6 Nf8 19.Rg1 Rxg1+ 20.Rxg1 h6 21.h4 
Na6 22.Rg7 Qe8 23.Kh2 c4 24.b3 b5 25.Qb2 cxb3 26.axb3 b4 27.cxb4 Nxb4 28.
Qc3+ Nc6 29.b4 Kb8 30.Nf4 Nd8 31.Nd3 Qb5 32.Nfe1 Nd7 33.Nc2 Qa4 34.Rg1 Nb6
35.Na3 Qc6 36.Nc5 Ka8 37.b5 Qc8 38.Nc2 Nb7 39.Nb4 Nxc5 40.dxc5 Na4 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.18"]
[Round "5"]
[White "Heidenfeld, Wolfgang"]
[Black "Czerniak, Moshe"]
[Result "0-1"]
[ECO "B06"]
[EventDate "1962.08.14"]
[PlyCount "56"]

1.e4 g6 2.d4 Bg7 3.f4 c5 4.c3 cxd4 5.cxd4 Qb6 6.Nf3 d5 7.e5 Bg4 8.Nc3 e6 
9.Nb5 Bf8 10.Qa4 Nc6 11.Be2 Bxf3 12.Bxf3 a6 13.Nd6+ Bxd6 14.exd6 Qxd4 15.
Qb3 Qb4+ 16.Qxb4 Nxb4 17.O-O Rd8 18.Bd2 Nc6 19.Bc3 f6 20.g4 Rxd6 21.g5 Kf7
22.Rad1 h6 23.f5 gxf5 24.Bh5+ Ke7 25.g6 Kf8 26.Rde1 Kg7 27.b3 Nge7 28.Rf2 
e5 0-1

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.18"]
[Round "5"]
[White "Henneberke, Frans"]
[Black "Hiong Liong Tan"]
[Result "0-1"]
[ECO "A56"]
[EventDate "1962.08.14"]
[PlyCount "80"]

1.d4 Nf6 2.c4 c5 3.d5 g6 4.Nc3 d6 5.g3 Bg7 6.Bg2 O-O 7.Nh3 Na6 8.Nf4 Nc7 
9.O-O Rb8 10.Bd2 a6 11.a4 b5 12.axb5 axb5 13.Nxb5 Nxb5 14.cxb5 Rxb5 15.Bc3
Qb6 16.Qc2 Bd7 17.Bf3 Rb3 18.Ra2 Rb8 19.Rfa1 Ne8 20.Ra7 Bxc3 21.bxc3 Nf6 
22.Ra8 Kg7 23.Rxb8 Qxb8 24.h4 Qb5 25.Qd2 Qc4 26.Rc1 Bf5 27.Ng2 Be4 28.Ne3 
Qa4 29.c4 Bxf3 30.exf3 Qb4 31.Qxb4 cxb4 32.c5 Rc3 33.Rxc3 bxc3 34.cxd6 
exd6 35.Kf1 Nxd5 36.Nc2 Nb6 37.Ke2 Kf6 38.Kd3 Na4 39.Kc4 Ke5 40.Ne3 d5+ 
0-1

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.18"]
[Round "5"]
[White "Kieninger, Georg"]
[Black "Dunkelblum, Arthur"]
[Result "1/2-1/2"]
[ECO "B13"]
[EventDate "1962.08.14"]
[PlyCount "35"]

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.Bd3 Nf6 5.c3 Nc6 6.Bf4 Bg4 7.Nf3 e6 8.Nbd2 
Bd6 9.Bg3 O-O 10.O-O Rc8 11.Qe1 Bxg3 12.hxg3 Bh5 13.Ne5 Nxe5 14.dxe5 Nd7 
15.Nb3 Qc7 16.f4 Nc5 17.Nxc5 Qxc5+ 18.Qf2 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.18"]
[Round "5"]
[White "Kool, Gerard"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[ECO "A53"]
[EventDate "1962.08.14"]
[PlyCount "33"]

1.d4 Nf6 2.c4 d6 3.Nc3 Nbd7 4.e4 e5 5.Be3 Be7 6.f3 c6 7.Qd2 O-O 8.O-O-O a6
9.d5 cxd5 10.Nxd5 Nxd5 11.cxd5 b5 12.Bd3 Nc5 13.Bc2 Bd7 14.Ne2 Rc8 15.Kb1 
a5 16.Ng3 b4 17.Nf5 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.18"]
[Round "5"]
[White "Langeweg, Christian"]
[Black "Van den Berg, Carel"]
[Result "0-1"]
[ECO "E13"]
[EventDate "1962.08.14"]
[PlyCount "68"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.Bg5 h6 6.Bh4 Bb4 7.e3 g5 8.Bg3 Ne4 
9.Qc2 Bxc3+ 10.bxc3 d6 11.Bd3 Nxg3 12.fxg3 Nd7 13.O-O Qe7 14.a4 a5 15.Nd2 
O-O-O 16.Rab1 g4 17.c5 dxc5 18.Nc4 h5 19.Be4 Bd5 20.Qd3 f5 21.Rxf5 exf5 
22.Bxd5 Rde8 23.Re1 Qf6 24.Nb2 h4 25.Qa6+ Kd8 26.Nd3 hxg3 27.hxg3 Qd6 28.
Nf4 Nf6 29.Bf7 Ref8 30.Be6 Ne4 31.Bb3 Ke7 32.Qc4 Kf6 33.dxc5 Nxc5 34.Rd1 
Qe5 0-1

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.18"]
[Round "5"]
[White "Rellstab, Ludwig"]
[Black "Donner, Jan"]
[Result "0-1"]
[ECO "B93"]
[EventDate "1962.08.14"]
[PlyCount "50"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 e5 7.Nf3 Nbd7 8.Bd3 g6
9.O-O Bg7 10.fxe5 dxe5 11.Kh1 O-O 12.Qe1 b5 13.Bg5 h6 14.Bd2 Bb7 15.Qh4 b4
16.Ne2 Nxe4 17.Bxb4 Qxh4 18.Nxh4 Rfc8 19.Rad1 Nef6 20.Nc3 Nb6 21.Rde1 e4 
22.Nxe4 Bxe4 23.Rxe4 Nxe4 24.Bxe4 Rc4 25.Bxa8 Rxb4 0-1

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.21"]
[Round "6"]
[White "Donner, Jan"]
[Black "Czerniak, Moshe"]
[Result "1-0"]
[ECO "D36"]
[EventDate "1962.08.14"]
[PlyCount "73"]

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 Be7 6.e3 O-O 7.Bd3 c6 8.Qc2 
Nbd7 9.Nf3 Re8 10.O-O Nf8 11.Rab1 Ne4 12.Bxe7 Qxe7 13.b4 Bf5 14.b5 Qd6 15.
bxc6 bxc6 16.Ne5 Nxc3 17.Qxc3 Bxd3 18.Nxd3 Re6 19.Qb4 Qd8 20.Rfc1 Rh6 21.
Qb7 Rc8 22.Qxa7 Ra8 23.Qb7 Rxa2 24.Rxc6 Rxc6 25.Qxc6 Qa5 26.h4 Qd2 27.Qxd5
g6 28.Rb7 Ra1+ 29.Kh2 Qa2 30.Qxa2 Rxa2 31.Kg3 f6 32.Nc5 h5 33.d5 f5 34.d6 
Ra8 35.Re7 Nh7 36.Ne6 Nf6 37.d7 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.21"]
[Round "6"]
[White "Dunkelblum, Arthur"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[ECO "D40"]
[EventDate "1962.08.14"]
[PlyCount "27"]

1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.e3 d5 5.Nc3 Nc6 6.a3 cxd4 7.exd4 Be7 8.Bg5 O-O
9.Rc1 b6 10.cxd5 exd5 11.Be2 Be6 12.O-O Ne4 13.Bxe7 Nxe7 14.Bd3 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.21"]
[Round "6"]
[White "Hartoch, Robert"]
[Black "Heidenfeld, Wolfgang"]
[Result "0-1"]
[ECO "C06"]
[EventDate "1962.08.14"]
[PlyCount "79"]

1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.Bd3 c5 6.c3 Nc6 7.Ne2 cxd4 8.cxd4 f6
9.exf6 Nxf6 10.O-O Qb6 11.Nf3 Bd6 12.b3 e5 13.dxe5 Nxe5 14.Nxe5 Bxe5 15.
Rb1 O-O 16.Bf4 Qd6 17.Bxe5 Qxe5 18.Ng3 g6 19.Qd2 Bd7 20.Qb4 a5 21.Qb6 Bc6 
22.Qc5 Nd7 23.Qc2 Qf6 24.a3 Ne5 25.b4 axb4 26.axb4 Ra3 27.Be2 b5 28.Rb3 
Rxb3 29.Qxb3 Nc4 30.Qd3 Kg7 31.Bd1 Qe5 32.Ne2 Bd7 33.Nc3 Bf5 34.Qg3 Re8 
35.Qxe5+ Rxe5 36.f4 Re8 37.Bf3 d4 38.Nxb5 d3 39.Nd4 Be4 40.Rd1 0-1

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.21"]
[Round "6"]
[White "Rellstab, Ludwig"]
[Black "Kieninger, Georg"]
[Result "1/2-1/2"]
[ECO "A44"]
[EventDate "1962.08.14"]
[PlyCount "32"]

1.d4 c5 2.d5 e5 3.e4 d6 4.Nc3 a6 5.a4 Ne7 6.Bd3 Ng6 7.Nf3 Be7 8.O-O O-O 9.
Ne2 Bg4 10.Ng3 Nh4 11.Be2 Bxf3 12.Bxf3 Nd7 13.Bg4 Nf6 14.Bg5 Nxg4 15.Bxh4 
Bxh4 16.Qxg4 Bxg3 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.21"]
[Round "6"]
[White "Hiong Liong Tan"]
[Black "Kool, Gerard"]
[Result "1-0"]
[ECO "E15"]
[EventDate "1962.08.14"]
[PlyCount "133"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 d5 6.cxd5 exd5 7.Qa4+ Qd7 8.Qb3 
Nc6 9.Nc3 Bb4 10.a3 Bxc3+ 11.Qxc3 O-O 12.Qc2 a5 13.b3 Rfe8 14.O-O Ne4 15.
Bb2 f6 16.Rac1 Re7 17.Ne1 Nd8 18.Nd3 Rc8 19.Nf4 Ne6 20.Bh3 N4g5 21.Bg4 Qd6
22.h4 Nxf4 23.hxg5 f5 24.Bxf5 Rxe2 25.Qb1 Rd2 26.gxf4 Rf8 27.Rc3 Ba6 28.
Bc1 Qxf4 29.Bxd2 Qxd2 30.Qc2 Qxg5+ 31.Rg3 Qxf5 32.Qxf5 Rxf5 33.Rc1 Rf7 34.
Rgc3 Rf4 35.Rxc7 Bd3 36.Rd7 h6 37.Rxd5 Rg4+ 38.Kh2 Be4 39.Rd8+ Kh7 40.Re8 
Bd5 41.Rb8 Rg2+ 42.Kh3 Rxf2 43.Rxb6 Rd2 44.Rc3 Rxd4 45.Ra6 h5 46.Rg3 h4 
47.Rg4 Rd3+ 48.Kxh4 Rxb3 49.Rxa5 Be6 50.Rg1 g6 51.Kg5 Rb7 52.Kf6 Bh3 53.a4
Rb6+ 54.Kg5 Rb7 55.Rh1 Rb3 56.Ra7+ Kg8 57.Kxg6 Kf8 58.Re1 Rg3+ 59.Kf6 Rf3+
60.Ke5 Bg2 61.a5 Rd3 62.Rb1 Rd5+ 63.Ke6 Rd8 64.Rb6 Bd5+ 65.Kf6 Ke8 66.a6 
Bf7 67.Re7+ 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.21"]
[Round "6"]
[White "Van den Berg, Carel"]
[Black "Henneberke, Frans"]
[Result "1/2-1/2"]
[ECO "C76"]
[EventDate "1962.08.14"]
[PlyCount "92"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 Bd7 6.d4 g6 7.O-O Bg7 8.dxe5 dxe5
9.Bg5 Nf6 10.Nbd2 Qe7 11.Re1 h6 12.Bh4 Rd8 13.Nf1 Nb8 14.Ne3 c6 15.Nd2 O-O
16.b4 Be6 17.Qc2 g5 18.Bg3 Nh5 19.Bb3 Nxg3 20.hxg3 Rd7 21.Ndf1 Rfd8 22.g4 
Qf6 23.Re2 Qf4 24.Rae1 Qf6 25.Ng3 Bf8 26.Ngf5 a5 27.a3 axb4 28.axb4 Na6 
29.Bxe6 fxe6 30.Ng3 Nc7 31.Nc4 Bg7 32.Re3 Nb5 33.Rf3 Qe7 34.Kh2 Rf8 35.
Rxf8+ Qxf8 36.Nh5 Qd8 37.Re2 Rd3 38.Re3 Rxe3 39.Nxe3 Bh8 40.Nc4 Qd7 41.Na5
Kf7 42.Qe2 b6 43.Nb3 Ke7 44.Qe3 Qd8 45.Ng3 Kd7 46.Ne2 Kc7 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.22"]
[Round "7"]
[White "Czerniak, Moshe"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[ECO "B13"]
[EventDate "1962.08.14"]
[PlyCount "160"]

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.Bd3 Nc6 5.c3 Nf6 6.Bf4 Bg4 7.Ne2 Bh5 8.Nd2 
e6 9.O-O Bd6 10.Bxd6 Qxd6 11.f4 Bg6 12.Nf3 Be4 13.Ne5 O-O 14.Ng3 Ne7 15.
Qe2 Bxd3 16.Qxd3 g6 17.Rae1 a6 18.Qf3 b5 19.Nd3 a5 20.Re2 b4 21.Rfe1 Nf5 
22.Nc5 Nxg3 23.hxg3 h5 24.Rc1 Rab8 25.Qd3 Kg7 26.Rce1 Rfe8 27.Qf3 Qc6 28.
Qe3 Ng4 29.Qd2 Qd6 30.cxb4 axb4 31.a4 bxa3 32.bxa3 Nh6 33.Qc3 Nf5 34.a4 
Qb6 35.a5 Qb4 36.Qxb4 Rxb4 37.a6 Nxd4 38.Ra2 Nc6 39.a7 Rb5 40.Nxe6+ Kf6 
41.Rc1 Kxe6 42.Rxc6+ Kd7 43.Rf6 Ra8 44.Rxf7+ Ke6 45.Rc7 d4 46.Kf2 Kf5 47.
Rd7 Rb4 48.Rd6 Rb7 49.Rda6 Rb5 50.Rd2 Rd5 51.Rd3 Rd7 52.Ra5+ Kf6 53.Ra6+ 
Kf7 54.g4 hxg4 55.Kg3 Raxa7 56.Rxa7 Rxa7 57.Rxd4 Ra2 58.Rd5 Kf6 59.Rg5 Rb2
60.Rxg4 Rb3+ 61.Kh4 Rb4 62.Kh3 Ra4 63.Rh4 Rb4 64.Kg4 Rb2 65.g3 Rb3 66.Rh7 
Rb1 67.Ra7 Rb6 68.Kh4 Rb1 69.Ra6+ Kg7 70.g4 Rb7 71.Kg5 Rb5+ 72.f5 gxf5 73.
gxf5 Rb7 74.Rg6+ Kf7 75.Rh6 Kg7 76.f6+ Kg8 77.Kg6 Rg7+ 78.Kf5 Ra7 79.Rh2 
Ra1 80.Re2 Kf7 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.22"]
[Round "7"]
[White "Heidenfeld, Wolfgang"]
[Black "Hiong Liong Tan"]
[Result "0-1"]
[ECO "C28"]
[EventDate "1962.08.14"]
[PlyCount "142"]

1.e4 e5 2.Nc3 Nc6 3.Bc4 Nf6 4.d3 Na5 5.Bb3 Nxb3 6.axb3 d5 7.Bg5 dxe4 8.
dxe4 Qxd1+ 9.Rxd1 Bb4 10.f3 c6 11.Ne2 Nd7 12.Nc1 f6 13.Be3 Be7 14.Nd3 b6 
15.Ra1 Kd8 16.b4 Bb7 17.Kf2 Kc7 18.Ra2 a6 19.Rha1 Rab8 20.Na4 Bc8 21.c4 
Rd8 22.Ke2 b5 23.cxb5 Rxb5 24.Nc3 Rb8 25.Ba7 Ra8 26.Be3 Rb8 27.Rc1 Kd6 28.
Ba7 Ra8 29.Bc5+ Nxc5 30.Nxc5 Kc7 31.Ra5 Kb6 32.Rca1 Rd4 33.N3a4+ Kc7 34.
Nc3 Rxb4 35.Nd3 Rd4 36.Rc1 Kb6 37.Raa1 Be6 38.Na4+ Kc7 39.Ndc5 Bc4+ 40.Ke3
Bxc5 41.Nxc5 Kb6 42.Ra4 Kxc5 43.b3 Kb5 44.Raxc4 Rxc4 45.Rxc4 Rd8 46.Rc1 a5
47.h4 c5 48.g4 h6 49.g5 hxg5 50.hxg5 Rd4 51.g6 Kb4 52.Ra1 Rd8 53.f4 exf4+ 
54.Kxf4 Rd2 55.Kf3 Rh2 56.e5 fxe5 57.Kg4 e4 58.Ra4+ Kxb3 59.Rxe4 a4 60.Re7
a3 61.Rxg7 a2 62.Rb7+ Kc2 63.Ra7 Kb1 64.Kf3 Rh3+ 65.Kf2 Rh6 66.g7 Rg6 67.
Rb7+ Kc1 68.Ra7 Rxg7 69.Rxa2 c4 70.Ke3 Rg3+ 71.Kd4 c3 0-1

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.22"]
[Round "7"]
[White "Henneberke, Frans"]
[Black "Dunkelblum, Arthur"]
[Result "1-0"]
[ECO "E57"]
[EventDate "1962.08.14"]
[PlyCount "37"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.e3 Nc6 6.a3 cxd4 7.exd4 Be7 8.Bg5 
dxc4 9.Bxc4 O-O 10.O-O b6 11.Qd3 Bb7 12.Rad1 Re8 13.Rfe1 Nd7 14.d5 Nc5 15.
Qc2 exd5 16.Nxd5 Bxg5 17.Rxe8+ Qxe8 18.Nxg5 Ne4 19.Nxe4 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.22"]
[Round "7"]
[White "Kieninger, Georg"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "B54"]
[EventDate "1962.08.14"]
[PlyCount "55"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3 e5 6.Nb3 d5 7.Bg5 Be6 8.exd5 
Qxd5 9.Nc3 Bb4 10.Qd2 Qxd2+ 11.Bxd2 Nc6 12.Bb5 O-O-O 13.Bxc6 bxc6 14.O-O-O
Nd5 15.Nxd5 Bxd2+ 16.Rxd2 Rxd5 17.Re1 f6 18.f4 Re8 19.fxe5 Rxe5 20.Rxe5 
fxe5 21.Re2 Bf5 22.Nd4 Bd7 23.Nf3 e4 24.Nd2 Bf5 25.Nc4 Kc7 26.Ne3 Bg6 27.
Rd2 Re5 28.b3 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.22"]
[Round "7"]
[White "Kool, Gerard"]
[Black "Van den Berg, Carel"]
[Result "1/2-1/2"]
[ECO "E19"]
[EventDate "1962.08.14"]
[PlyCount "25"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 Ne4 8.Qc2 
Nxc3 9.Qxc3 f5 10.Rd1 Bf6 11.Ne5 Qc8 12.Bxb7 Qxb7 13.Qf3 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.22"]
[Round "7"]
[White "Langeweg, Christian"]
[Black "Rellstab, Ludwig"]
[Result "1-0"]
[ECO "C98"]
[EventDate "1962.08.14"]
[PlyCount "83"]

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 Nc6 13.dxc5 dxc5 14.Nf1 Be6 15.Ne3 
Rad8 16.Qe2 g6 17.a4 c4 18.Ng5 Bc8 19.axb5 axb5 20.b3 cxb3 21.Bxb3 Na5 22.
Nd5 Nxd5 23.Bxd5 Nc4 24.Rb1 Bd7 25.Qf3 Be8 26.Qg3 Kg7 27.Qh4 h5 28.Qg3 Bd7
29.Nf3 Bf6 30.Nh4 Rg8 31.Bg5 Bxg5 32.Qxg5 Qd6 33.Rxb5 Kh7 34.Bxc4 Bxb5 35.
Bxf7 Rdf8 36.Bxg8+ Rxg8 37.Nf3 Re8 38.Ra1 Re7 39.Ra5 Bc6 40.Ra6 Re8 41.
Ra7+ Bd7 42.Nxe5 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.24"]
[Round "8"]
[White "Donner, Jan"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[ECO "E69"]
[EventDate "1962.08.14"]
[PlyCount "80"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.O-O Nbd7 7.Nc3 e5 8.e4 c6 
9.h3 Qe7 10.Be3 Ne8 11.Re1 f5 12.exf5 gxf5 13.dxe5 dxe5 14.Bg5 Qf7 15.Bf1 
h6 16.Bh4 e4 17.Nd2 Ne5 18.Be2 Nf6 19.Kh2 Be6 20.b3 Rad8 21.Qc2 Rd7 22.
Rad1 Rfd8 23.Nf1 Nd3 24.Bxd3 Rxd3 25.Ne2 Rxd1 26.Rxd1 Rxd1 27.Qxd1 Qd7 28.
Qc2 Nh5 29.Ne3 Qd3 30.Qxd3 exd3 31.Ng1 f4 32.Nd1 fxg3+ 33.Bxg3 Bf5 34.Nf3 
b5 35.cxb5 cxb5 36.Bc7 Bf8 37.Ne3 Be4 38.Nd2 Bh7 39.Kg2 Bb4 40.Nef1 Nf6 
1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.24"]
[Round "8"]
[White "Dunkelblum, Arthur"]
[Black "Kool, Gerard"]
[Result "1-0"]
[ECO "E18"]
[EventDate "1962.08.14"]
[PlyCount "89"]

1.Nf3 Nf6 2.g3 b6 3.Bg2 Bb7 4.O-O e6 5.c4 Be7 6.Nc3 O-O 7.d4 d5 8.Ne5 c5 
9.cxd5 exd5 10.dxc5 Bxc5 11.Nd3 Na6 12.Bg5 Be7 13.Nf4 Nc7 14.Qb3 Ne4 15.
Bxe7 Qxe7 16.Nfxd5 Nxd5 17.Nxd5 Qe5 18.Rfd1 Rad8 19.Ne3 Qf6 20.Ng4 Qf5 21.
Qf3 Qb5 22.Qe3 Qf5 23.Qf4 Qxf4 24.gxf4 f5 25.Ne5 Ba6 26.Kf1 Bb5 27.Ke1 a5 
28.Rxd8 Rxd8 29.Bxe4 fxe4 30.Rd1 Rc8 31.Rd6 g5 32.Rxb6 Rc5 33.Ng4 gxf4 34.
Nf6+ Kg7 35.Nxe4 Re5 36.f3 Be8 37.Kf2 Bg6 38.Ra6 Rb5 39.b3 h5 40.Nd6 Rg5 
41.Nc4 h4 42.Rxa5 Bf5 43.Nd6 h3 44.Rxf5 Rg2+ 45.Kf1 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.24"]
[Round "8"]
[White "Kieninger, Georg"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[ECO "B44"]
[EventDate "1962.08.14"]
[PlyCount "70"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.g3 d5 6.Bg2 dxe4 7.Nxc6 Qxd1+ 8.
Kxd1 bxc6 9.Bxe4 Bd7 10.Nd2 Nf6 11.Bg2 Bc5 12.Ke2 e5 13.Ne4 Nxe4 14.Bxe4 
f5 15.Bg2 Rb8 16.Rd1 Ke7 17.b3 Bd4 18.Bg5+ Ke6 19.c3 Bxc3 20.Rac1 Bd4 21.
Bxc6 Bc8 22.Be3 Ba6+ 23.Ke1 Rhd8 24.Bxd4 exd4 25.Bf3 d3 26.Kd2 Rbc8 27.
Re1+ Kf6 28.h3 g5 29.g4 h6 30.gxf5 Rc2+ 31.Rxc2 dxc2+ 32.Kxc2 Bd3+ 33.Kc1 
Bxf5 34.Bg4 Rc8+ 35.Kd1 Rd8+ 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.24"]
[Round "8"]
[White "Rellstab, Ludwig"]
[Black "Henneberke, Frans"]
[Result "1/2-1/2"]
[ECO "C50"]
[EventDate "1962.08.14"]
[PlyCount "34"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.d3 Nf6 5.Nc3 d6 6.a3 Nd4 7.Nxd4 Bxd4 8.Be3 
Bxe3 9.fxe3 c6 10.O-O O-O 11.Qd2 Be6 12.Bxe6 fxe6 13.Rf3 a5 14.Raf1 Qb6 
15.Nd1 Nd7 16.Rxf8+ Rxf8 17.Rxf8+ Nxf8 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.24"]
[Round "8"]
[White "Hiong Liong Tan"]
[Black "Czerniak, Moshe"]
[Result "1-0"]
[ECO "A31"]
[EventDate "1962.08.14"]
[PlyCount "65"]

1.d4 Nf6 2.c4 c5 3.Nf3 g6 4.g3 Bg7 5.Bg2 O-O 6.O-O Na6 7.Nc3 d6 8.e4 Bg4 
9.d5 Qd7 10.Qd3 e5 11.a3 Ne8 12.Rb1 f5 13.Ng5 f4 14.f3 h6 15.fxg4 hxg5 16.
h3 Bf6 17.Bf3 Bd8 18.Bd1 Nf6 19.Kg2 Qh7 20.Bd2 Ne8 21.Ba4 Nac7 22.h4 Nf6 
23.Bd1 gxh4 24.gxf4 exf4 25.Bxf4 Be7 26.e5 Nfe8 27.Bc2 dxe5 28.Bxe5 Rxf1 
29.Rxf1 Rd8 30.Ne4 Qh6 31.Qf3 Qf8 32.Qe3 h3+ 33.Qxh3 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.24"]
[Round "8"]
[White "Van den Berg, Carel"]
[Black "Heidenfeld, Wolfgang"]
[Result "1-0"]
[ECO "A90"]
[EventDate "1962.08.14"]
[PlyCount "141"]

1.d4 e6 2.c4 f5 3.g3 Nf6 4.Bg2 Bb4+ 5.Bd2 Qe7 6.Nf3 O-O 7.O-O Bxd2 8.Qxd2 
d6 9.Nc3 c6 10.Rae1 d5 11.Qc2 Nbd7 12.Nd2 Ne4 13.Ndxe4 dxe4 14.f3 Qd6 15.
Rd1 exf3 16.exf3 Nf6 17.Rfe1 Bd7 18.Qb3 Qc7 19.Ne2 Be8 20.Nf4 Bf7 21.Nxe6 
Bxe6 22.Rxe6 Qd7 23.Ree1 Rae8 24.Rxe8 Rxe8 25.d5 c5 26.Qd3 g6 27.b3 Qd6 
28.Qd2 Kf7 29.Bf1 Nh5 30.Kf2 f4 31.g4 Nf6 32.Re1 Nd7 33.Rxe8 Kxe8 34.Bd3 
Qf6 35.Be4 b6 36.Kg2 Ke7 37.a3 Kd6 38.h4 h6 39.b4 g5 40.Bf5 Qe5 41.Bxd7 
Kxd7 42.hxg5 hxg5 43.bxc5 bxc5 44.a4 a5 45.Kf2 Kd6 46.Qe2 Qd4+ 47.Kg2 Qf6 
48.Qe8 Kc7 49.Qb5 Qd4 50.Qxa5+ Kb7 51.Qb5+ Ka7 52.Qd7+ Ka6 53.Qc6+ Ka7 54.
Qd7+ Ka6 55.Qc6+ Ka7 56.Qc7+ Ka6 57.Qc6+ Ka7 58.Qd7+ Ka6 59.Qe6+ Ka5 60.
Qe2 Kxa4 61.Qc2+ Kb4 62.Kf1 Qh8 63.Ke2 Ka3 64.Qd2 Qh2+ 65.Kd1 Qh1+ 66.Kc2 
Ka4 67.d6 Qxf3 68.d7 Qa3 69.d8=Q Qa2+ 70.Kd3 Qb3+ 71.Ke2 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.25"]
[Round "9"]
[White "Czerniak, Moshe"]
[Black "Van den Berg, Carel"]
[Result "1-0"]
[ECO "B20"]
[EventDate "1962.08.14"]
[PlyCount "69"]

1.e4 c5 2.b3 Nc6 3.Bb2 d5 4.exd5 Qxd5 5.Nc3 Qd8 6.Bc4 Nf6 7.Nge2 e6 8.Ng3 
Be7 9.O-O O-O 10.Nce4 Nxe4 11.Nxe4 b6 12.f4 Nd4 13.Ng3 Bb7 14.f5 exf5 15.
Nxf5 Bf6 16.c3 Nxf5 17.Rxf5 Qd7 18.Rf2 Rad8 19.Qh5 g6 20.Qh6 Bg7 21.Qh4 b5
22.Bf1 Rfe8 23.a4 Re4 24.Qg5 Re5 25.Qg3 bxa4 26.Rxa4 Bc6 27.Ra5 h6 28.Ba3 
Rg5 29.Qh4 Re8 30.Rxc5 Re4 31.Rf4 Rxf4 32.Qxf4 Rxc5 33.Bxc5 Qd5 34.Bxa7 
Qxb3 35.Qb8+ 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.25"]
[Round "9"]
[White "Hartoch, Robert"]
[Black "Hiong Liong Tan"]
[Result "1/2-1/2"]
[ECO "A08"]
[EventDate "1962.08.14"]
[PlyCount "33"]

1.g3 g6 2.Bg2 Bg7 3.Nf3 d5 4.O-O c5 5.d3 Nc6 6.Nbd2 e6 7.e4 Nge7 8.c3 b6 
9.Qe2 Bb7 10.Re1 O-O 11.Nf1 b5 12.e5 d4 13.h4 dxc3 14.bxc3 b4 15.c4 Nf5 
16.Bb2 a5 17.a4 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.25"]
[Round "9"]
[White "Heidenfeld, Wolfgang"]
[Black "Dunkelblum, Arthur"]
[Result "1/2-1/2"]
[ECO "B12"]
[EventDate "1962.08.14"]
[PlyCount "44"]

1.e4 c6 2.d4 d5 3.e5 Bf5 4.Ne2 e6 5.Ng3 Bg6 6.h4 h6 7.h5 Bh7 8.c3 c5 9.Bd3
Bxd3 10.Qxd3 cxd4 11.cxd4 Qa5+ 12.Nc3 Qa6 13.Nb5 Qb6 14.O-O a6 15.Nc3 Nc6 
16.Be3 Nge7 17.f4 g6 18.hxg6 fxg6 19.Na4 Qb5 20.Qxb5 axb5 21.Nc3 b4 22.Nb5
Kd7 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.25"]
[Round "9"]
[White "Henneberke, Frans"]
[Black "Kieninger, Georg"]
[Result "1/2-1/2"]
[ECO "A44"]
[EventDate "1962.08.14"]
[PlyCount "48"]

1.d4 c5 2.d5 e5 3.e4 d6 4.Bd3 Ne7 5.Ne2 Ng6 6.O-O Be7 7.a4 O-O 8.Na3 Nd7 
9.Bd2 Bg5 10.Nc4 Bxd2 11.Qxd2 Qc7 12.a5 Re8 13.Rfb1 Rb8 14.c3 Nf6 15.b4 
Bd7 16.f3 h6 17.bxc5 Qxc5+ 18.Qe3 Qxe3+ 19.Nxe3 Rec8 20.Bb5 Rc7 21.Bxd7 
Rxd7 22.Nc4 Ne8 23.Na3 Nf8 24.Nb5 Ra8 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.25"]
[Round "9"]
[White "Kool, Gerard"]
[Black "Rellstab, Ludwig"]
[Result "0-1"]
[ECO "E11"]
[EventDate "1962.08.14"]
[PlyCount "94"]

1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Bd2 Qe7 5.a3 Bxd2+ 6.Nbxd2 d6 7.e4 e5 8.Bd3 
O-O 9.O-O Bg4 10.Qb3 Nc6 11.Qc3 b6 12.d5 Nb8 13.b4 Bxf3 14.Nxf3 Nbd7 15.g3
a5 16.Nh4 g6 17.Qd2 Nh5 18.Qh6 Ndf6 19.Be2 Ng7 20.Qe3 Ra7 21.c5 dxc5 22.
bxc5 Qxc5 23.Qxc5 bxc5 24.f3 Rb8 25.a4 Rb2 26.Bb5 g5 27.Ng2 g4 28.Ra3 Ra8 
29.Ne1 gxf3 30.Raxf3 Nxe4 31.Nd3 Rxb5 32.axb5 Nd2 33.Nxe5 Nxf3+ 34.Rxf3 f5
35.Nc4 Rd8 36.Rd3 Rb8 37.Rb3 a4 38.Rb1 Ne8 39.Kf2 Nd6 40.Na3 Kf7 41.Rc1 
Kf6 42.Ke3 Nxb5 43.Nc4 Nd6 44.Nd2 Rb2 45.Kd3 a3 46.Ra1 Rb4 47.Ke3 Rd4 0-1

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.25"]
[Round "9"]
[White "Langeweg, Christian"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "B42"]
[EventDate "1962.08.14"]
[PlyCount "43"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 g6 6.O-O Bg7 7.Ne2 Ne7 8.c4 d5 
9.cxd5 exd5 10.exd5 Qxd5 11.Nbc3 Qd8 12.Bg5 O-O 13.Bxa6 Nxa6 14.Qxd8 Rxd8 
15.Bxe7 Re8 16.Bd6 Be6 17.Rfd1 Red8 18.f3 Rd7 19.Bf4 Rxd1+ 20.Rxd1 Nb4 21.
b3 Nxa2 22.Nd5 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.28"]
[Round "10"]
[White "Donner, Jan"]
[Black "Hiong Liong Tan"]
[Result "1/2-1/2"]
[ECO "E90"]
[EventDate "1962.08.14"]
[PlyCount "81"]

1.d4 Nf6 2.c4 c5 3.d5 g6 4.Nc3 d6 5.e4 Bg7 6.h3 O-O 7.Nf3 a6 8.a4 e6 9.Bd3
Qe7 10.O-O e5 11.Bg5 h6 12.Be3 Nh5 13.Qd2 g5 14.Rfe1 Nf4 15.Bc2 Nd7 16.Nh2
Nf6 17.Rab1 h5 18.a5 Bh6 19.Na4 Rb8 20.Nb6 Nd7 21.Nxc8 Rfxc8 22.g3 Nxh3+ 
23.Kh1 Kh7 24.f3 Rg8 25.Bd3 Rg6 26.Bf1 Nf4 27.b4 cxb4 28.Rxb4 g4 29.gxf4 
exf4 30.Bxf4 Bxf4 31.Qxf4 Qh4 32.Re2 Rf6 33.Qc1 Ne5 34.fxg4 Nd3 35.Qb1 
Nf2+ 36.Kg1 Qg3+ 37.Bg2 Nh3+ 38.Kh1 Nf2+ 39.Rxf2 Rxf2 40.e5+ Kh8 41.Qg1 
1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.28"]
[Round "10"]
[White "Dunkelblum, Arthur"]
[Black "Czerniak, Moshe"]
[Result "0-1"]
[ECO "A07"]
[EventDate "1962.08.14"]
[PlyCount "56"]

1.Nf3 Nf6 2.g3 d5 3.Bg2 Bf5 4.O-O e6 5.c4 Nbd7 6.Nc3 c6 7.d3 h6 8.Qe1 Be7 
9.e4 Bh7 10.Qe2 O-O 11.cxd5 exd5 12.e5 Ne8 13.d4 Nc7 14.Be3 f6 15.Rad1 Bb4
16.Bh3 Bxc3 17.bxc3 fxe5 18.Nxe5 Nxe5 19.dxe5 Qe7 20.f4 Nb5 21.Rc1 Na3 22.
c4 Nxc4 23.Rxc4 dxc4 24.Qxc4+ Kh8 25.Bc5 Qc7 26.Bxf8 Rxf8 27.Rd1 Qb6+ 28.
Qd4 Rd8 0-1

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.28"]
[Round "10"]
[White "Kieninger, Georg"]
[Black "Kool, Gerard"]
[Result "1-0"]
[ECO "C41"]
[EventDate "1962.08.14"]
[PlyCount "137"]

1.e4 e5 2.Nf3 d6 3.d4 Nf6 4.Nc3 Nbd7 5.Bc4 Be7 6.O-O O-O 7.h3 c6 8.a4 a5 
9.Re1 Qc7 10.b3 exd4 11.Nxd4 Ne5 12.Bf1 Rd8 13.Qe2 Re8 14.Bb2 Nfd7 15.g3 
Nc5 16.Bg2 Bf8 17.Qd2 f6 18.Kh2 Bd7 19.Rad1 Rad8 20.Re3 Bc8 21.Qe2 Qf7 22.
Re1 Kh8 23.f4 Ng6 24.Nd1 Bd7 25.Qd2 b6 26.Nf2 Ne7 27.Nd3 Nxd3 28.Qxd3 Qh5 
29.f5 c5 30.Nf3 d5 31.g4 dxe4 32.Rxe4 Qf7 33.Qa6 Nd5 34.Qc4 Rxe4 35.Rxe4 
Re8 36.Rxe8 Bxe8 37.Ne5 fxe5 38.Bxd5 Qc7 39.Qe4 Bd6 40.c4 Qe7 41.Qe3 Qf6 
42.Kg2 g6 43.Be4 gxf5 44.Bxf5 h5 45.Be4 hxg4 46.hxg4 Kg7 47.Bc3 Bd7 48.Bf3
Kf7 49.Qe4 Qf4 50.Qd5+ Ke7 51.Bd2 Qd4 52.Bg5+ Kf8 53.Qxd4 cxd4 54.Bd8 Bc5 
55.Kg3 Kf7 56.Be4 Kg7 57.g5 Kf7 58.Bc7 Ke6 59.g6 Kf6 60.Bd8+ Kg7 61.Kh4 d3
62.Bxd3 Bc6 63.Kg5 e4 64.Bf6+ Kg8 65.Be2 Bf8 66.c5 Bd5 67.cxb6 Bxb3 68.Be5
Be7+ 69.Kf4 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.28"]
[Round "10"]
[White "Langeweg, Christian"]
[Black "Henneberke, Frans"]
[Result "1-0"]
[ECO "A16"]
[EventDate "1962.08.14"]
[PlyCount "88"]

1.Nf3 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.g3 Bg7 6.Bg2 O-O 7.O-O c5 8.Nxd5 
Qxd5 9.d3 Nc6 10.Be3 Qd6 11.Nd2 b6 12.Ne4 Qc7 13.Qa4 Bd7 14.Bf4 Be5 15.
Bxe5 Nxe5 16.Qc2 Rac8 17.Rac1 Qb8 18.Qd2 Bc6 19.Qh6 Bxe4 20.Bxe4 Qd6 21.
Rc3 Rfd8 22.Rfc1 Qe6 23.b3 a5 24.a3 Rb8 25.Bg2 Ng4 26.Qd2 Qf6 27.Qe1 Rd6 
28.b4 axb4 29.axb4 cxb4 30.Rc8+ Rxc8 31.Rxc8+ Kg7 32.h3 Nh6 33.Qxb4 Nf5 
34.Qa4 Nd4 35.Bf1 Rc6 36.Rd8 Rc1 37.Qe8 Qc6 38.Qh8+ Kh6 39.Qf8+ Kh5 40.g4+
Kg5 41.Qxe7+ Kh6 42.Qf8+ Kg5 43.h4+ Kxg4 44.Rxd4+ Kh5 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.28"]
[Round "10"]
[White "Rellstab, Ludwig"]
[Black "Heidenfeld, Wolfgang"]
[Result "1/2-1/2"]
[ECO "A98"]
[EventDate "1962.08.14"]
[PlyCount "38"]

1.d4 e6 2.Nf3 f5 3.g3 Nf6 4.Bg2 Be7 5.c4 d6 6.Nc3 O-O 7.O-O Qe8 8.Qc2 Qg6 
9.Ne1 Nc6 10.d5 Nd8 11.dxe6 Nxe6 12.Nd5 Bd8 13.Nd3 Kh8 14.N3f4 Nxf4 15.
Nxf4 Qe8 16.b3 Ne4 17.Bb2 Bf6 18.Rad1 Bxb2 19.Qxb2 a5 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.28"]
[Round "10"]
[White "Van den Berg, Carel"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[ECO "C96"]
[EventDate "1962.08.14"]
[PlyCount "74"]

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 Nd7 12.Nbd2 cxd4 13.cxd4 Nc6 14.Nf1 exd4 15.Nxd4 
Nde5 16.Nxc6 Nxc6 17.Ne3 Be6 18.Bb3 Bxb3 19.Qxb3 Rc8 20.Bd2 Bf6 21.Rad1 
Be5 22.Nd5 Re8 23.f4 Bd4+ 24.Kh2 Bf2 25.Rf1 Qh4 26.Qf3 Bc5 27.Be1 Qh6 28.
Bf2 Nb4 29.Nxb4 Bxb4 30.a3 Bc5 31.Bg3 a5 32.Qd3 b4 33.a4 Qe6 34.Rfe1 Red8 
35.e5 Qe7 36.Qf5 dxe5 37.fxe5 Qe6 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.30"]
[Round "11"]
[White "Czerniak, Moshe"]
[Black "Rellstab, Ludwig"]
[Result "1-0"]
[ECO "B08"]
[EventDate "1962.08.14"]
[PlyCount "53"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 c6 5.h3 Bg7 6.Be3 a6 7.Qd2 b5 8.Bd3 Bb7 9.
O-O O-O 10.Bh6 c5 11.Bxg7 Kxg7 12.e5 dxe5 13.dxe5 Nd5 14.Ne4 Qb6 15.Qg5 f6
16.Qh4 Nb4 17.Rad1 Ra7 18.exf6+ exf6 19.Rfe1 Nxd3 20.Neg5 fxg5 21.Re7+ Rf7
22.Rxf7+ Kxf7 23.Qxh7+ Ke8 24.Qg8+ Ke7 25.Nxg5 Qf6 26.Rxd3 Nd7 27.Qh7+ 1-0

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.30"]
[Round "11"]
[White "Hartoch, Robert"]
[Black "Dunkelblum, Arthur"]
[Result "1/2-1/2"]
[ECO "B18"]
[EventDate "1962.08.14"]
[PlyCount "52"]

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.Nf3 Nd7 7.Bd3 Ngf6 8.O-O
e6 9.Bxg6 hxg6 10.Re1 Bd6 11.Qe2 O-O 12.Bg5 Qc7 13.a3 Rfe8 14.Ne5 Nf8 15.
c4 N6h7 16.Bd2 Nf6 17.b4 Red8 18.Bc3 Be7 19.Ra2 N6d7 20.Ne4 Nxe5 21.dxe5 
c5 22.b5 Rd7 23.Rd1 Rad8 24.Rad2 Rxd2 25.Rxd2 Rxd2 26.Qxd2 Nd7 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.30"]
[Round "11"]
[White "Heidenfeld, Wolfgang"]
[Black "Kieninger, Georg"]
[Result "1/2-1/2"]
[ECO "B22"]
[EventDate "1962.08.14"]
[PlyCount "33"]

1.e4 c5 2.c3 Nf6 3.e5 Nd5 4.Nf3 d6 5.exd6 Qxd6 6.d4 cxd4 7.Nxd4 a6 8.Be2 
e5 9.Nc2 Nc6 10.Bf3 Be6 11.Ne3 Nxe3 12.Bxe3 Qxd1+ 13.Bxd1 O-O-O 14.Nd2 Kc7
15.Bb3 Bxb3 16.Nxb3 f5 17.f3 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.30"]
[Round "11"]
[White "Henneberke, Frans"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "B14"]
[EventDate "1962.08.14"]
[PlyCount "105"]

1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.Nc3 d5 5.e3 cxd4 6.exd4 Be7 7.b3 O-O 8.Bd3 b6 
9.O-O Bb7 10.Bb2 Nc6 11.Rc1 Rc8 12.Re1 Qd6 13.Qe2 Rfe8 14.Red1 Qf4 15.Qe3 
Qxe3 16.fxe3 dxc4 17.Bxc4 Nb4 18.h3 a6 19.a3 Nbd5 20.Nxd5 exd5 21.Bd3 Bd6 
22.Ne5 Ne4 23.Rxc8 Rxc8 24.Rc1 f6 25.Rxc8+ Bxc8 26.Nc6 Bd7 27.Nb4 Bxb4 28.
axb4 Nd6 29.Bc3 Bf5 30.Bxa6 Bc2 31.Be2 Bxb3 32.Bd3 Bc4 33.Bc2 Nb5 34.Bb2 
Kf7 35.e4 dxe4 36.Bxe4 Nd6 37.Bc2 g6 38.Kf2 Ke6 39.Ke3 Kd5 40.g3 Bf1 41.
Bb3+ Bc4 42.Bc2 Ba2 43.Bd3 Bb1 44.Bf1 g5 45.g4 f5 46.gxf5 Bxf5 47.Bc1 h6 
48.Kf3 Be4+ 49.Kg4 Nf5 50.Ba6 Kxd4 51.Bb2+ Ke3 52.Be5 Ne7 53.Kh5 1/2-1/2

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.30"]
[Round "11"]
[White "Kool, Gerard"]
[Black "Langeweg, Christian"]
[Result "0-1"]
[ECO "A53"]
[EventDate "1962.08.14"]
[PlyCount "66"]

1.d4 Nf6 2.c4 d6 3.Nc3 Nbd7 4.e3 g6 5.Bd3 Bg7 6.Nge2 O-O 7.O-O e5 8.f4 c6 
9.f5 Re8 10.Ng3 Qb6 11.Kh1 a6 12.Nce4 exd4 13.Nxd6 Rf8 14.exd4 Qxd4 15.Be2
Qc5 16.Rb1 a5 17.Bg5 h6 18.Bf4 g5 19.Bc1 Rd8 20.Nge4 Qe5 21.Qc2 Bf8 22.
Nxf6+ Nxf6 23.c5 b6 24.b4 Bxd6 25.cxd6 Rxd6 26.Bb2 Qe4 27.Qc4 axb4 28.Rbd1
b5 29.Qxe4 Nxe4 30.Rxd6 Nxd6 31.Rd1 Rxa2 32.Rxd6 Rxb2 33.Bf1 Bxf5 0-1

[Event "2nd IBM tournament"]
[Site "Amsterdam NED"]
[Date "1962.08.30"]
[Round "11"]
[White "Hiong Liong Tan"]
[Black "Van den Berg, Carel"]
[Result "1-0"]
[ECO "E19"]
[EventDate "1962.08.14"]
[PlyCount "113"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 Ne4 8.Qc2 
Nxc3 9.Qxc3 f5 10.d5 Bf6 11.Qc2 Na6 12.Rd1 Qe7 13.Ne1 Nc5 14.Rb1 Rae8 15.
Be3 d6 16.Bxc5 dxc5 17.dxe6 Bxg2 18.Nxg2 Qxe6 19.e3 Be5 20.Rd5 Bd6 21.Rbd1
Re7 22.Nh4 g6 23.Nf3 Rg7 24.Re1 Qf6 25.Kg2 Re7 26.Re2 Rfe8 27.Red2 Rf8 28.
R2d3 Rfe8 29.Ra3 a5 30.Rad3 Re6 31.Rd2 Rf8 32.Ng1 Re7 33.Ne2 Re6 34.R5d3 
Re4 35.Nc3 Rxc4 36.Nd5 Rxc2 37.Nxf6+ Rxf6 38.Rxc2 a4 39.h3 b5 40.g4 c4 41.
Rd1 f4 42.exf4 Bxf4 43.Rd8+ Kg7 44.Re2 a3 45.bxa3 c3 46.Rd5 Bd2 47.Rc5 Rf7
48.Re6 Kf8 49.Rec6 Be1 50.f3 Rd7 51.Rxb5 Rd2+ 52.Kf1 Rb2 53.Rbc5 Bd2 54.
Rxc7 Rxa2 55.Ra5 Ra1+ 56.Kg2 Re1 57.Ra8+ 1-0

