[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.10"]
[Round "1"]
[White "Barendregt, Johan"]
[Black "Van Weezel, Chr"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "71"]
[ECO "B62"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Qd3 a6 8.Rd1 
Bd7 9.Be2 Qa5 10.Bxf6 gxf6 11.O-O Rg8 12.f4 Be7 13.Kh1 O-O-O 14.a3 Qb6 15.
Nb3 Na7 16.Nd2 Bc6 17.Nc4 Qc7 18.Ne3 Kb8 19.a4 Rc8 20.Ra1 Rg7 21.Bf3 h5 
22.Ne2 h4 23.c4 Be8 24.Nd4 Nc6 25.Nxc6+ Bxc6 26.b4 b6 27.b5 Bb7 28.bxa6 
Bxa6 29.Rfb1 Bb7 30.a5 d5 31.Rxb6 Bc5 32.Rb3 Ka7 33.a6 Ba8 34.exd5 Qxf4 
35.Qb1 Rc7 36.Rb7+ 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.10"]
[Round "1"]
[White "Cortlever, Nicolaas"]
[Black "Spanjaard, Eduard"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "109"]
[ECO "B40"]

1.e4 c5 2.Nf3 e6 3.Be2 Nc6 4.O-O Nf6 5.Nc3 d5 6.exd5 Nxd5 7.Nxd5 Qxd5 8.b3
Be7 9.Bb2 Bf6 10.Bxf6 gxf6 11.c3 e5 12.d4 cxd4 13.cxd4 exd4 14.Bc4 Qd6 15.
Bb5 O-O 16.Bxc6 Qxc6 17.Rc1 Qd6 18.Qxd4 Qxd4 19.Nxd4 Rd8 20.Rfd1 Be6 21.f3
Rac8 22.Rxc8 Rxc8 23.Kf2 Rc7 24.Re1 b6 25.Re2 Bd7 26.Rd2 Kf8 27.Ne2 Be6 
28.Rd8+ Ke7 29.Rb8 Bc8 30.Nd4 Kd7 31.Ra8 a5 32.Ke3 Rc5 33.Ra7+ Rc7 34.
Rxc7+ Kxc7 35.Nb5+ Kd7 36.Kd4 Ba6 37.Nc3 Ke6 38.Nd5 Bf1 39.Nxb6 Bxg2 40.f4
Kf5 41.Ke3 Kg4 42.Nd7 Kh3 43.Nxf6 Kxh2 44.Nxh7 Kg3 45.Nf6 Bc6 46.a3 Bb5 
47.b4 axb4 48.axb4 Bc6 49.Ne4+ Kg4 50.Nd6 f6 51.b5 Bg2 52.b6 Bc6 53.b7 
Bxb7 54.Nxb7 Kf5 55.Nc5 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.10"]
[Round "1"]
[White "Jonkman, Meinard"]
[Black "Van den Berg, Carel"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "82"]
[ECO "E94"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 Nbd7 7.O-O e5 8.dxe5 
dxe5 9.b3 Re8 10.Qc2 c6 11.Bb2 Qc7 12.Rad1 Nc5 13.b4 Ne6 14.Na4 Nh5 15.g3 
Nf8 16.Nd2 Bh3 17.Rfe1 Nf6 18.c5 b5 19.cxb6 axb6 20.b5 Qa7 21.Nc3 Ne6 22.
Nf3 c5 23.Bc4 Nd4 24.Nxd4 exd4 25.Nd5 Nxd5 26.Bxd5 Rad8 27.Qc4 Be6 28.Bxe6
Rxe6 29.Rd3 Ra8 30.Ra3 Qb7 31.Ra6 Rd8 32.a4 d3 33.Bxg7 Kxg7 34.f3 Qc7 35.
Rd1 Red6 36.Qc3+ Kg8 37.Qe5 c4 38.a5 bxa5 39.Rxd6 Qxd6 40.Qc3 Qc5+ 41.Kg2 
Qxb5 0-1

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.10"]
[Round "1"]
[White "Roessel, Fritz"]
[Black "Van Donk, Henk"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "80"]
[ECO "E81"]

1.c4 Nf6 2.d4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Bg5 c5 7.d5 Na6 8.Qd2 Nc7 9.
g4 e6 10.O-O-O exd5 11.exd5 a6 12.h4 b5 13.h5 bxc4 14.Bh6 Nb5 15.Bxg7 Kxg7
16.hxg6 fxg6 17.Qh6+ Kg8 18.g5 Nxc3 19.gxf6 Nxa2+ 20.Kb1 Bf5+ 21.Bd3 Bxd3+
22.Rxd3 Ra7 23.Re3 Nb4 24.Nh3 Qxf6 25.Ng5 Nd3 26.Rxd3 cxd3 27.Nxh7 Qg7 28.
Nxf8 Qxh6 29.Rxh6 Kxf8 30.Rxg6 Rg7 31.Rf6+ Ke7 32.Re6+ Kd7 33.Kc1 Rg5 34.
Kd2 Rxd5 35.Re4 Kc6 36.Rf4 a5 37.b3 Kb5 38.Ra4 Rf5 39.f4 d5 40.Kxd3 Rh5 
0-1

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.10"]
[Round "1"]
[White "Van Scheltinga, Theodore"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "64"]
[ECO "E69"]

1.c4 Nf6 2.Nf3 g6 3.g3 Bg7 4.Bg2 O-O 5.O-O d6 6.d4 Nbd7 7.Nc3 e5 8.e4 c6 
9.h3 a6 10.Be3 Qe7 11.Qc2 b5 12.dxe5 dxe5 13.Nd2 b4 14.Na4 Bb7 15.Nb3 Rfb8
16.Rfd1 a5 17.Rd2 Bf8 18.Rad1 Bc8 19.c5 Ba6 20.Bf1 Bb5 21.Bxb5 cxb5 22.Nb6
Nxb6 23.cxb6 Rc8 24.Qd3 a4 25.Nc5 Rxc5 26.Bxc5 Qxc5 27.b7 Rb8 28.Qd8 Rxd8 
29.Rxd8 Nxe4 30.Rf1 Nxg3 31.b8=Q Nxf1 32.Kxf1 Qc1+ 1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.11"]
[Round "2"]
[White "Donner, Jan"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "105"]
[ECO "C81"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 
Be6 9.Qe2 Be7 10.Rd1 Nc5 11.Be3 Nxb3 12.axb3 O-O 13.c4 Nb4 14.Nc3 c6 15.
Rac1 Qb8 16.Bg5 Ra7 17.Bxe7 Rxe7 18.cxd5 Nxd5 19.Nd4 Nxc3 20.Rxc3 Bd7 21.
f4 f6 22.e6 Qxf4 23.Rf3 Qg5 24.Nf5 Rxe6 25.Qd3 Bc8 26.Rg3 Qxf5 27.Qxf5 
Re1+ 28.Rxe1 Bxf5 29.Re7 Rf7 30.Re8+ Rf8 31.Rge3 Bd7 32.Rxf8+ Kxf8 33.b4 
Kf7 34.Kf2 Be6 35.g3 Ke7 36.Ra3 Bc8 37.Ke3 g6 38.Kd4 Kd6 39.Re3 Be6 40.Re1
Bd7 41.Rf1 f5 42.Ra1 g5 43.Rxa6 Be8 44.Ra1 Bg6 45.Rf1 Ke6 46.Rc1 Kd6 47.
Rc5 h6 48.Rc1 Bh7 49.Ra1 Ke6 50.Ra6 f4 51.Rxc6+ Kf5 52.gxf4 gxf4 53.Rxh6 
1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.11"]
[Round "2"]
[White "Orbaan, Constant"]
[Black "Van Scheltinga, Theodore"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "50"]
[ECO "B27"]

1.e4 c5 2.Nf3 g6 3.c3 Bg7 4.d4 cxd4 5.cxd4 d5 6.exd5 Nf6 7.Bb5+ Nbd7 8.Nc3
O-O 9.Bxd7 Bxd7 10.Qb3 Qb6 11.Qxb6 axb6 12.Ne5 Rfd8 13.Nd3 Ba4 14.Nb4 Bb3 
15.Be3 Nxd5 16.Ncxd5 Bxd5 17.O-O Ra4 18.a3 Bb3 19.Rac1 Bxd4 20.Bxd4 Rxd4 
21.Rc7 Rd2 22.Rxe7 Rxb2 23.Rxb7 Bc4 24.Rd1 Rxa3 25.h4 Rxb4 0-1

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.11"]
[Round "2"]
[White "Spanjaard, Eduard"]
[Black "Barendregt, Johan"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "80"]
[ECO "B07"]

1.d4 d6 2.e4 Nf6 3.Nc3 e5 4.dxe5 dxe5 5.Qxd8+ Kxd8 6.Bg5 Be6 7.O-O-O+ Nd7 
8.Nf3 Bd6 9.Nd2 h6 10.Bh4 g5 11.Bg3 Ke7 12.Nc4 Nh5 13.Nxd6 cxd6 14.Nb5 Nc5
15.Nxd6 Nxg3 16.hxg3 Rad8 17.Nf5+ Bxf5 18.Rxd8 Rxd8 19.exf5 Ne4 20.Rxh6 
Nxf2 21.f6+ Ke6 22.Bc4+ Kf5 23.b3 Rd1+ 24.Kb2 Rd7 25.Bb5 Rd6 26.Be8 Ng4 
27.Rh1 Kg6 28.Re1 a6 29.Re4 Rd8 30.Bxf7+ Kxf7 31.Rxg4 Kxf6 32.Kc3 Kf5 33.
Rb4 Rd7 34.g4+ Ke6 35.Re4 Rd1 36.a4 Kd5 37.Re2 Rf1 38.Kd3 Rf4 39.c4+ Ke6 
40.Re4 Rf2 1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.11"]
[Round "2"]
[White "Van Weezel, Chr"]
[Black "Jonkman, Meinard"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "32"]
[ECO "C62"]

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 d6 5.d4 Bd7 6.O-O Nxd4 7.Bxd7+ Qxd7 8.
Nxd4 exd4 9.Qxd4 Be7 10.Be3 O-O 11.Rad1 Qc6 12.Qd3 Rfe8 13.Bd4 Nd7 14.Qb5 
Bf6 15.Qxc6 bxc6 16.Bxf6 Nxf6 1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.11"]
[Round "2"]
[White "Van den Berg, Carel"]
[Black "Roessel, Fritz"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "0"]

1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.12"]
[Round "3"]
[White "Barendregt, Johan"]
[Black "Donner, Jan"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "50"]
[ECO "C36"]

1.e4 e5 2.f4 exf4 3.Nf3 d5 4.exd5 Nf6 5.Bb5+ c6 6.dxc6 bxc6 7.Bc4 Nd5 8.
Nc3 Be6 9.Bxd5 cxd5 10.d4 Bd6 11.O-O Nc6 12.Ne5 Nxe5 13.dxe5 Bxe5 14.Qf3 
O-O 15.Rd1 Qb6+ 16.Kh1 Rad8 17.Rb1 d4 18.Ne4 Bxa2 19.Ra1 Bd5 20.Bxf4 Bxf4 
21.Qxf4 Qxb2 22.Ng3 d3 23.Rac1 dxc2 24.Rf1 Bb3 25.Nf5 Rd1 0-1

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.12"]
[Round "3"]
[White "Cortlever, Nicolaas"]
[Black "Orbaan, Constant"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "133"]
[ECO "A49"]

1.Nf3 Nf6 2.g3 g6 3.Bg2 Bg7 4.O-O O-O 5.d4 d6 6.b3 e5 7.dxe5 Ng4 8.Nbd2 
Nc6 9.Nc4 Be6 10.Rb1 Ngxe5 11.Nfxe5 dxe5 12.Ba3 Re8 13.Bxc6 bxc6 14.Qxd8 
Rexd8 15.Rfd1 Bf5 16.Ne3 Bh3 17.Be7 Re8 18.Bc5 Bh6 19.f3 Bxe3+ 20.Bxe3 Bf5
21.Rd2 Red8 22.Rbd1 Rxd2 23.Rxd2 f6 24.g4 Be6 25.Rd3 Kf7 26.Rc3 Bd7 27.Kf2
a6 28.Rc4 g5 29.Bd2 Ke6 30.Ba5 Kd6 31.Rc3 Rc8 32.Rd3+ Ke7 33.Rd1 Be8 34.e4
Bf7 35.h4 gxh4 36.Rh1 Bg6 37.Ke2 Kd7 38.Rxh4 Re8 39.Bb4 Ke6 40.Rh1 Rd8 41.
Ke3 Rd7 42.a4 Be8 43.a5 Rg7 44.Bc5 Rd7 45.c3 Rg7 46.Ke2 Rd7 47.b4 Rg7 48.
c4 Rf7 49.Rh6 Rg7 50.g5 Bg6 51.gxf6 Kxf6 52.f4 Rd7 53.f5 Kg7 54.Be3 Be8 
55.Re6 Kf7 56.Bc5 h5 57.Rxe5 h4 58.Re6 h3 59.Rh6 Kg7 60.Rxh3 Bf7 61.Ke3 
Bxc4 62.Bd4+ Kf8 63.e5 c5 64.Bxc5+ Kg7 65.Bd4 c5 66.bxc5 Rb7 67.e6+ 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.12"]
[Round "3"]
[White "Jonkman, Meinard"]
[Black "Spanjaard, Eduard"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "80"]
[ECO "E67"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.g3 O-O 5.Bg2 d6 6.Nf3 Nbd7 7.O-O e5 8.e3 c6 
9.Qc2 Re8 10.dxe5 dxe5 11.Rd1 Qc7 12.Bh3 Nc5 13.Bxc8 Qxc8 14.b4 e4 15.Nd4 
Ne6 16.Nxe6 Qxe6 17.Ne2 Qh3 18.Nf4 Qh6 19.Bb2 g5 20.Ng2 Ng4 21.h4 Bxb2 22.
Qxb2 Ne5 23.c5 Nf3+ 24.Kf1 Qe6 25.Ne1 Qh3+ 26.Ke2 Ng1+ 27.Kd2 Rad8+ 28.Kc3
Qg4 29.Rd2 gxh4 30.Rad1 Rxd2 31.Rxd2 hxg3 32.fxg3 Nf3 33.Re2 Ne5 34.Qd2 
Qe6 35.Qd4 Qd5 36.Qxd5 cxd5 37.Kd4 Nc6+ 38.Kxd5 Nxb4+ 39.Kd6 Na6 40.Rb2 
Re6+ 1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.12"]
[Round "3"]
[White "Roessel, Fritz"]
[Black "Van Weezel, Chr"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "55"]
[ECO "E09"]

1.c4 Nf6 2.d4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Qc2 c6 8.b3 Re8 
9.Bb2 Bd6 10.Nbd2 a5 11.a3 Nf8 12.Ne5 Ng6 13.Ndf3 Bd7 14.c5 Bc7 15.Nxg6 
hxg6 16.Ne5 Bxe5 17.dxe5 Ng4 18.h3 Nh6 19.g4 Kh7 20.f4 Rh8 21.Rad1 Qe7 22.
Bd4 Rhf8 23.e4 Kh8 24.g5 Ng8 25.Qf2 f5 26.exd5 cxd5 27.c6 Bxc6 28.Bc5 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.12"]
[Round "3"]
[White "Van Donk, Henk"]
[Black "Van den Berg, Carel"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "0"]

0-1

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.13"]
[Round "4"]
[White "Donner, Jan"]
[Black "Jonkman, Meinard"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "59"]
[ECO "C18"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.Qg4 Nbc6 8.Nf3 
Qc7 9.Bd3 Ng6 10.Kd1 Bd7 11.h4 O-O-O 12.h5 c4 13.Bf1 Nge7 14.Qxg7 Nf5 15.
Qg5 b6 16.Qf4 h6 17.g4 Nfe7 18.Be2 Rdg8 19.Be3 Rg7 20.Kd2 Be8 21.Qf6 Rhh7 
22.g5 Nf5 23.gxh6 Rg2 24.Rag1 Rxg1 25.Rxg1 Qd8 26.Rg7 Nxg7 27.hxg7 Ne7 28.
Ng5 Ng8 29.Nxh7 Nxf6 30.Nxf6 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.13"]
[Round "4"]
[White "Orbaan, Constant"]
[Black "Barendregt, Johan"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "51"]
[ECO "E73"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 e5 6.dxe5 dxe5 7.Qxd8+ Kxd8 8.f4 
c6 9.Nf3 Nbd7 10.fxe5 Ng4 11.e6 fxe6 12.Ng5 Bxc3+ 13.bxc3 Nge5 14.Nxe6+ 
Ke7 15.Nd4 h6 16.O-O b6 17.h4 c5 18.h5 Bb7 19.hxg6 Bxe4 20.g7 Rh7 21.Nf5+ 
Ke6 22.Ng3 Bg6 23.Bf4 Rxg7 24.Rae1 Bf7 25.Bf3 Rag8 26.Bd5+ 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.13"]
[Round "4"]
[White "Spanjaard, Eduard"]
[Black "Roessel, Fritz"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "61"]
[ECO "D36"]

1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.Nf3 c6 5.Bg5 Nbd7 6.cxd5 exd5 7.e3 Be7 8.Qc2 
O-O 9.Bd3 Re8 10.O-O g6 11.Rab1 Nh5 12.Bxe7 Qxe7 13.b4 f5 14.b5 Qd6 15.
Rfc1 Ndf6 16.bxc6 bxc6 17.Ne5 f4 18.Bxg6 hxg6 19.Qxg6+ Ng7 20.exf4 Rf8 21.
g4 Rb8 22.Ne2 Rxb1 23.Rxb1 c5 24.dxc5 Qxc5 25.Rc1 Qe7 26.Nd4 Ne4 27.Rxc8 
Rxc8 28.Nf5 Qb7 29.Nf7 Qb2 30.N7h6+ Kh8 31.Nf7+ 1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.13"]
[Round "4"]
[White "Van Scheltinga, Theodore"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "0"]

1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.13"]
[Round "4"]
[White "Van Weezel, Chr"]
[Black "Van Donk, Henk"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "96"]
[ECO "C49"]

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bb4 5.d3 d6 6.Bg5 O-O 7.O-O Bxc3 8.bxc3 
Qe7 9.Qd2 Nd8 10.Bc4 Ne6 11.Bxe6 Bxe6 12.a3 h6 13.Bh4 Bg4 14.Qe3 Qe6 15.
Bxf6 Qxf6 16.Nd2 g5 17.f3 Be6 18.g4 Kg7 19.Kg2 Rh8 20.Rh1 h5 21.h3 Qf4 22.
Qxf4 gxf4 23.c4 Bd7 24.Nb1 Ba4 25.Ra2 Rh6 26.Nc3 Bd7 27.Raa1 Rg8 28.Rab1 
b6 29.Nd5 c6 30.Nc3 Kf6 31.Kf2 Rgh8 32.Kg2 Ke7 33.Rbg1 f6 34.Rb1 Kd8 35.
Rbg1 Kc7 36.Rb1 Kb7 37.Ra1 Ka6 38.Rab1 Ka5 39.Rb4 Ka6 40.Rbb1 Be6 41.Rbd1 
Ka5 42.Rb1 hxg4 43.hxg4 Rxh1 44.Rxh1 Rxh1 45.Kxh1 b5 46.cxb5 cxb5 47.d4 b4
48.axb4+ Kxb4 0-1

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.15"]
[Round "5"]
[White "Barendregt, Johan"]
[Black "Van Scheltinga, Theodore"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "99"]
[ECO "A43"]

1.e4 c5 2.Nf3 g6 3.d4 Bg7 4.d5 d6 5.Nc3 Nf6 6.g3 Na6 7.Bg2 Nc7 8.a4 O-O 9.
O-O Bd7 10.e5 Ng4 11.exd6 exd6 12.Bf4 Bf5 13.Re1 Re8 14.Rxe8+ Nxe8 15.Qe2 
f6 16.Re1 Ne5 17.b3 Qb6 18.Bc1 Nc7 19.Nxe5 fxe5 20.Ne4 Ne8 21.g4 Bd7 22.h3
Rc8 23.Nd2 Qd8 24.Nc4 b5 25.axb5 Bxb5 26.g5 Rc7 27.h4 Rf7 28.h5 gxh5 29.
Be4 Bf8 30.Qxh5 Rg7 31.Kh1 Nc7 32.Rg1 Be8 33.Qh4 Be7 34.f4 exf4 35.Bxf4 
Bg6 36.Bxg6 hxg6 37.Kg2 Nxd5 38.Rh1 Nxf4+ 39.Qxf4 Bxg5 40.Qe4 Bh6 41.Qd5+ 
Kh7 42.Ne3 Qe7 43.Ng4 Qe2+ 44.Kg3 Re7 45.Rxh6+ Kg7 46.Rh1 Qxc2 47.Qf3 Qb2 
48.Rf1 Kh7 49.Qh1+ Kg8 50.Qa8+ 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.15"]
[Round "5"]
[White "Jonkman, Meinard"]
[Black "Orbaan, Constant"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "81"]
[ECO "E63"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.g3 O-O 5.Bg2 d6 6.Nf3 Nc6 7.O-O a6 8.b3 Rb8 
9.Bb2 b5 10.cxb5 axb5 11.Rc1 b4 12.Na4 Na5 13.Qc2 c6 14.Ne1 Bg4 15.Nd3 Bh6
16.e3 Qd7 17.Qd2 Nd5 18.f4 Bh3 19.e4 Bxg2 20.Kxg2 Nf6 21.Rfe1 Rb5 22.Nxb4 
Rh5 23.Kg1 g5 24.Nd3 Qh3 25.Qg2 Qxg2+ 26.Kxg2 gxf4 27.Nxf4 Bxf4 28.gxf4 d5
29.e5 Ne4 30.Nc5 f5 31.exf6 Rxf6 32.Nxe4 dxe4 33.Rxe4 Rfh6 34.Rh1 e6 35.
Re5 Nb7 36.Rxh5 Rxh5 37.Rc1 Nd8 38.Rc5 Rh6 39.a4 Kf7 40.a5 Rg6+ 41.Kf3 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.15"]
[Round "5"]
[White "Roessel, Fritz"]
[Black "Donner, Jan"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "92"]
[ECO "E00"]

1.c4 Nf6 2.d4 e6 3.g3 Bb4+ 4.Nd2 c5 5.dxc5 Bxc5 6.Bg2 Nc6 7.Ngf3 O-O 8.O-O
Be7 9.a3 a5 10.Nb1 Ne4 11.Nd4 Nc5 12.Nb5 a4 13.N1c3 Ne5 14.Qc2 Nxc4 15.
Nxa4 Nxa4 16.Qxc4 d5 17.Qd3 Bd7 18.Nc3 Nc5 19.Qd1 d4 20.b4 dxc3 21.bxc5 
Bxc5 22.Bxb7 Ba4 23.Qxd8 Raxd8 24.Be4 c2 25.Bb2 Rd1 26.Rc1 Rc8 27.Bxc2 
Rxc1 28.Bxa4 Rxf1+ 29.Kxf1 Bxa3 30.Bxa3 Ra8 31.Bc6 Rxa3 32.f4 Kf8 33.Bf3 
Ke7 34.Kf2 Kd6 35.Bb7 Kc5 36.Bf3 Kd4 37.Bc6 e5 38.fxe5 Kxe5 39.Bf3 f5 40.
Bc6 f4 41.Bf3 Rc3 42.Kg2 Kf5 43.Kf2 Ke5 44.Kg2 fxg3 45.Kxg3 Kf5 46.h3 Ra3 
0-1

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.15"]
[Round "5"]
[White "Van Donk, Henk"]
[Black "Spanjaard, Eduard"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "82"]
[ECO "B43"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.g3 b5 7.Bg2 Bb7 8.O-O Nf6
9.a3 Nc6 10.Nxc6 dxc6 11.Be3 Be7 12.Qe2 O-O 13.g4 Rad8 14.f4 c5 15.g5 Nd7 
16.f5 b4 17.Nd1 exf5 18.exf5 Rfe8 19.Bxb7 Qxb7 20.Qg2 Qb5 21.a4 Qb6 22.Nf2
Ne5 23.b3 Bf8 24.Rae1 Qc6 25.Ne4 c4 26.Bf4 Qd5 27.Qg3 Kh8 28.f6 g6 29.Rf2 
Nc6 30.Rd2 Nd4 31.c3 bxc3 32.Nxc3 Nf3+ 33.Kh1 Rxe1+ 34.Qxe1 Nxe1+ 35.Rxd5 
Rxd5 36.Nxd5 cxb3 37.Nc3 Bb4 38.Nb1 Nc2 39.Bc7 Na3 40.Nxa3 Bxa3 41.Be5 b2 
0-1

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.15"]
[Round "5"]
[White "Van den Berg, Carel"]
[Black "Van Weezel, Chr"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "81"]
[ECO "E38"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 c5 6.Nf3 d6 7.O-O Nc6 8.Qc2 Bxc3
9.Qxc3 e5 10.dxe5 dxe5 11.Nd2 Qe7 12.b3 b6 13.Bb2 Bb7 14.Rae1 Rad8 15.Bb1 
Rfe8 16.a3 Nb8 17.f3 Nbd7 18.Rf2 Nf8 19.Nf1 Ng6 20.e4 Nf4 21.Ne3 N6h5 22.
Nd5 Qg5 23.Bc1 Rd6 24.Be3 Rg6 25.Bxf4 Nxf4 26.Nxf4 Qxf4 27.Qd2 Qf6 28.Rd1 
Qe7 29.Qd7 Kf8 30.Rfd2 Bc6 31.Qxe7+ Kxe7 32.Kf2 Rc8 33.Bc2 Rc7 34.Ke3 Rd7 
35.Rxd7+ Bxd7 36.g3 Rd6 37.Rxd6 Kxd6 38.Bd3 Ke7 39.Bf1 Kf6 40.Be2 Kg5 41.
Bf1 1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.16"]
[Round "6"]
[White "Cortlever, Nicolaas"]
[Black "Barendregt, Johan"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "55"]
[ECO "D00"]

1.d4 Nf6 2.Nf3 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.Be2 c5 7.dxc5 Nbd7 8.O-O 
Nxc5 9.Be5 Ncd7 10.Bg3 Nb6 11.Nb5 Ne8 12.c4 Nd6 13.Nxd6 exd6 14.cxd5 Bxb2 
15.Rb1 Bf6 16.e4 Bd7 17.Qd2 Qe7 18.Bd3 Rfc8 19.Qb4 Rc5 20.Nd4 Rac8 21.Nb3 
Na4 22.Nxc5 dxc5 23.Qxb7 c4 24.Bc2 Nc3 25.e5 Bg5 26.Rbe1 Bd2 27.e6 Bxe1 
28.Qxd7 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.16"]
[Round "6"]
[White "Donner, Jan"]
[Black "Van Donk, Henk"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "69"]
[ECO "E41"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 b6 6.Ne2 Nc6 7.O-O Bb7 8.d5 Ne5 
9.Nb5 d6 10.dxe6 fxe6 11.Nf4 Ke7 12.a3 a6 13.Nd4 cxd4 14.exd4 Nxd3 15.Qxd3
b5 16.axb4 bxc4 17.Qxc4 Qc8 18.Qe2 g5 19.Nd3 Qc6 20.f3 Rhg8 21.h3 h5 22.
Ra5 Nd5 23.Re1 Qd7 24.Nf2 Rg6 25.b5 axb5 26.Rxa8 Bxa8 27.Ne4 Nf4 28.Bxf4 
gxf4 29.Qd2 e5 30.Kh2 Bc6 31.dxe5 dxe5 32.Qc2 Qd4 33.Nc3 Kf6 34.Rd1 Qb4 
35.Na2 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.16"]
[Round "6"]
[White "Orbaan, Constant"]
[Black "Roessel, Fritz"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "109"]
[ECO "B29"]

1.e4 c5 2.Nf3 Nf6 3.e5 Nd5 4.Nc3 Nxc3 5.dxc3 Nc6 6.Bc4 e6 7.Bf4 Qc7 8.Qd2 
b6 9.O-O-O h6 10.h4 Bb7 11.Bg3 O-O-O 12.Qf4 f5 13.h5 Rg8 14.Nh4 Be7 15.Qd2
Rde8 16.Ng6 Bd8 17.Qe2 Nb8 18.f3 Be7 19.Rd2 Bc6 20.a4 Qb7 21.Bb5 a6 22.
Bxc6 Qxc6 23.b3 Bg5 24.Bf4 Bxf4 25.Nxf4 Re7 26.Rd6 Qb7 27.Qc4 Nc6 28.Ng6 
Rf7 29.b4 cxb4 30.cxb4 b5 31.axb5 Qxb5 32.Qxb5 axb5 33.c3 Kc7 34.Rhd1 Rd8 
35.g3 Ne7 36.Nf4 Nc6 37.Ng6 Ra8 38.Kb2 Ra7 39.R1d2 Rb7 40.Rd1 Ra7 41.Kb3 
Ra4 42.Rc1 Na7 43.c4 Nc6 44.Rxc6+ dxc6 45.cxb5 Ra8 46.Rxc6+ Kd8 47.Rxe6 
Rd7 48.Kc4 Ra3 49.Ra6 Rc7+ 50.Rc6 Rxf3 51.e6 Rxg3 52.e7+ Rxe7 53.Nxe7 Rg4+
54.Kc5 Re4 55.Nd5 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.16"]
[Round "6"]
[White "Spanjaard, Eduard"]
[Black "Van den Berg, Carel"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "59"]
[ECO "D16"]

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bg4 6.e3 e6 7.Bxc4 Nbd7 8.O-O 
Be7 9.e4 O-O 10.Be3 Qa5 11.Be2 Rfd8 12.Qc2 e5 13.dxe5 Nxe5 14.Nxe5 Qxe5 
15.f4 Qh5 16.Bc4 Bc5 17.Qf2 Bxe3 18.Qxe3 Be6 19.Bxe6 fxe6 20.h3 Qa5 21.
Rad1 Qb4 22.e5 Nd5 23.Nxd5 Rxd5 24.Rxd5 cxd5 25.f5 exf5 26.Rxf5 Qxb2 27.e6
Qb1+ 28.Rf1 Qb6 29.Qxb6 axb6 30.Rf7 1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.16"]
[Round "6"]
[White "Van Scheltinga, Theodore"]
[Black "Jonkman, Meinard"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "62"]
[ECO "A54"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 d6 4.d4 exd4 5.Nxd4 Be6 6.g3 Nbd7 7.Nxe6 fxe6 8.
Bh3 Qe7 9.Nb5 Nb6 10.Nd4 e5 11.Ne6 h6 12.Qc2 Qf7 13.O-O g5 14.Bf5 Rg8 15.
a4 Rb8 16.e4 Nh5 17.a5 Nc8 18.a6 Nb6 19.axb7 Rxb7 20.c5 dxc5 21.Nxc5 Bxc5 
22.Qxc5 Qf6 23.Ra5 Qd6 24.Qxe5+ Qxe5 25.Rxe5+ Kf7 26.Bg4 Ng7 27.f4 Kf6 28.
Rc5 gxf4 29.Bxf4 Ke7 30.Rfc1 Ne8 31.Bd1 Na8 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.17"]
[Round "7"]
[White "Jonkman, Meinard"]
[Black "Cortlever, Nicolaas"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "81"]
[ECO "D20"]

1.d4 d5 2.c4 dxc4 3.Nc3 e5 4.d5 Nf6 5.Bg5 Nbd7 6.e4 Nb6 7.Nf3 h6 8.Bh4 Bg4
9.Bxc4 Nxc4 10.Qa4+ Qd7 11.Qxc4 Bxf3 12.gxf3 g5 13.Bg3 Bd6 14.h4 O-O-O 15.
O-O-O Qe7 16.Nb5 Kb8 17.Kb1 a6 18.Na3 Bxa3 19.bxa3 Nd7 20.Rc1 Qd6 21.Rh2 
f6 22.Rch1 Rhf8 23.hxg5 hxg5 24.Qb4 c5 25.Qc3 Rc8 26.Rh6 Ka7 27.Ka1 c4 28.
R1h5 Qc5 29.Qe3 c3 30.Kb1 c2+ 31.Kc1 Qb6 32.Qxb6+ Kxb6 33.Rh1 Rc4 34.Re1 
Rfc8 35.Re3 R8c5 36.Rb3+ Rb5 37.a4 Rxa4 38.Rxb5+ Kxb5 39.Kxc2 Rxa2+ 40.Kb1
Rd2 41.Rh7 0-1

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.17"]
[Round "7"]
[White "Roessel, Fritz"]
[Black "Van Scheltinga, Theodore"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "80"]
[ECO "A07"]

1.Nf3 d5 2.g3 Nd7 3.Bg2 e5 4.c4 dxc4 5.Qa4 c6 6.Qxc4 Bd6 7.d4 Ngf6 8.Nc3 
h6 9.O-O O-O 10.Be3 Ng4 11.Bd2 Nb6 12.Qd3 f5 13.e4 Bc5 14.h3 exd4 15.hxg4 
dxc3 16.Qxc3 fxe4 17.Nh2 Qd4 18.Qb3+ Qc4 19.Rac1 Qxb3 20.axb3 Bd4 21.Bc3 
Bxc3 22.bxc3 Be6 23.c4 a5 24.Rfe1 a4 25.Rxe4 Rfe8 26.bxa4 Nxa4 27.c5 Bf7 
28.Rb4 Ra7 29.Bf1 Ra5 30.Ra1 Rea8 31.Rxb7 Nxc5 32.Rxa5 Rxa5 33.Rc7 Bd5 34.
Bg2 Ra1+ 35.Nf1 Ne4 36.f3 Nxg3 37.Rc8+ Kf7 38.Kf2 Nxf1 39.Bxf1 Kf6 40.Ke2 
Ra3 1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.17"]
[Round "7"]
[White "Van Donk, Henk"]
[Black "Orbaan, Constant"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "63"]
[ECO "B47"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.g3 Nf6 7.Bg2 Nc6 8.O-O b5
9.e5 Ng8 10.Nxc6 dxc6 11.Be3 f5 12.exf6 Nxf6 13.Bf4 Qd7 14.Qf3 Nd5 15.Rad1
Qf7 16.Rfe1 Be7 17.Nxd5 cxd5 18.Qb3 g5 19.Be3 Bb7 20.Bd4 Rg8 21.Rd3 g4 22.
Rde3 Rg6 23.f4 Rh6 24.Re5 Kf8 25.Qe3 Rc8 26.c3 Rc6 27.Bxd5 exd5 28.Rxe7 
Qh5 29.Re8+ Kf7 30.Qe7+ Kg6 31.Qg7+ Kf5 32.R1e5# 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.17"]
[Round "7"]
[White "Van Weezel, Chr"]
[Black "Spanjaard, Eduard"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "50"]
[ECO "E67"]

1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 O-O 5.Bg2 d6 6.O-O Nbd7 7.Nc3 e5 8.Qc2 
exd4 9.Nxd4 Nb6 10.b3 c5 11.Ndb5 a6 12.Na3 Bf5 13.Qd1 d5 14.Bg5 d4 15.Ne4 
Bxe4 16.Bxe4 Qc7 17.Bf4 Qe7 18.Bf3 Rfe8 19.Qd3 Ne4 20.Bxe4 Qxe4 21.Rfe1 
Re6 22.Qxe4 Rxe4 23.Rad1 Rae8 24.Kf1 Nd7 25.e3 f5 1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.17"]
[Round "7"]
[White "Van den Berg, Carel"]
[Black "Donner, Jan"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "80"]
[ECO "A11"]

1.c4 Nf6 2.g3 c6 3.Nf3 d5 4.b3 g6 5.Bb2 Bg7 6.Bg2 O-O 7.O-O a5 8.Na3 a4 9.
d3 Na6 10.Nc2 Re8 11.cxd5 Nxd5 12.Bxg7 Kxg7 13.Qc1 f6 14.Qb2 axb3 15.axb3 
Be6 16.b4 Qb6 17.Rab1 Bf7 18.Rfe1 Qd8 19.Nfd4 Nac7 20.Nb3 Nb5 21.Na5 Qc7 
22.Nc4 Ra4 23.Ra1 Ndc3 24.Rxa4 Nxa4 25.Qc1 Ra8 26.Qe3 Nac3 27.Ra1 Rxa1+ 
28.Nxa1 Nd4 29.Bf1 e5 30.Qd2 Nd5 31.Bg2 b5 32.Na5 c5 33.bxc5 Nc3 34.Nb7 
Bd5 35.Bxd5 Nxd5 36.Na5 Qxc5 37.N1b3 Qa3 38.Nxd4 exd4 39.Kg2 Nc3 40.Nc6 
Qa8 0-1

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.18"]
[Round "8"]
[White "Barendregt, Johan"]
[Black "Jonkman, Meinard"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "49"]
[ECO "D36"]

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 Nbd7 6.cxd5 exd5 7.Bd3 c6 8.Qc2 
O-O 9.Nf3 Re8 10.O-O g6 11.Bf4 Nh5 12.Nxd5 Nxf4 13.Nxf4 Nb6 14.e4 Bf8 15.
h3 Bh6 16.Ne2 Be6 17.Nc3 Rc8 18.Rad1 Rc7 19.Rfe1 Rd7 20.d5 cxd5 21.Bb5 
dxe4 22.Bxd7 Nxd7 23.Nxe4 Qc8 24.Qxc8 Rxc8 25.Rxd7 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.18"]
[Round "8"]
[White "Cortlever, Nicolaas"]
[Black "Roessel, Fritz"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "85"]
[ECO "B38"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3 Nc6 6.c4 g6 7.Be3 Bg7 8.Qd2 O-O
9.Nc3 a6 10.Be2 Bd7 11.O-O Rc8 12.Rac1 Nxd4 13.Bxd4 Bc6 14.Rfe1 Qd7 15.Nd5
Bxd5 16.exd5 Ne8 17.Bf2 Bf6 18.b3 Nc7 19.a4 Qf5 20.Bd3 Qd7 21.a5 e5 22.
dxe6 Nxe6 23.Rcd1 Bd4 24.Bf1 Bxf2+ 25.Qxf2 Rcd8 26.f4 Rfe8 27.Qf3 Qc7 28.
b4 b6 29.f5 Nf8 30.Rxe8 Rxe8 31.Qd5 bxa5 32.Qxa5 Qxa5 33.bxa5 Re5 34.Rd5 
Rxf5 35.Rxf5 gxf5 36.c5 dxc5 37.Bxa6 Ne6 38.Bc4 Nd4 39.a6 Nc6 40.Kf2 Kg7 
41.Ke3 Kf6 42.Kf4 h6 43.Bb5 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.18"]
[Round "8"]
[White "Donner, Jan"]
[Black "Van Weezel, Chr"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "59"]
[ECO "E41"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 d6 6.Ne2 O-O 7.O-O Nc6 8.Qc2 Bxc3
9.Qxc3 Nh5 10.f4 f5 11.e4 Kh8 12.b3 Nf6 13.exf5 exf5 14.Bb2 Qe8 15.Rae1 
Qf7 16.d5 Ne7 17.Kh1 Bd7 18.Ng1 b6 19.Nf3 h6 20.Qd2 Rae8 21.Ne5 dxe5 22.
fxe5 Ng4 23.e6 Qh5 24.h3 Bc8 25.Kg1 Ng8 26.hxg4 fxg4 27.Qe3 Nf6 28.Rf5 Qh4
29.g3 Qh3 30.Bf1 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.18"]
[Round "8"]
[White "Orbaan, Constant"]
[Black "Van den Berg, Carel"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "64"]
[ECO "B52"]

1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Qxd7 5.O-O Nc6 6.c3 Nf6 7.Re1 e6 8.d3 
Be7 9.Nbd2 O-O 10.Nf1 b5 11.Ng3 Qb7 12.Bf4 Rfd8 13.Qd2 d5 14.e5 Ne8 15.Ng5
Rab8 16.Qe2 Bf8 17.Qg4 h6 18.Nh5 hxg5 19.Bxg5 d4 20.Nf6+ Nxf6 21.exf6 g6 
22.c4 bxc4 23.dxc4 Qxb2 24.Rad1 d3 25.Re3 Qc2 26.f4 Rb1 27.Ree1 Rxd1 28.
Rxd1 d2 29.h4 Qf5 30.Qf3 Nd4 31.Qb7 Qg4 32.Qb1 Ne2+ 0-1

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.18"]
[Round "8"]
[White "Van Scheltinga, Theodore"]
[Black "Van Donk, Henk"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "75"]
[ECO "E62"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nc3 d6 6.Nf3 Nc6 7.h3 e5 8.Be3 Nd7 
9.Qd2 f5 10.dxe5 Ndxe5 11.Nxe5 Nxe5 12.Rc1 c6 13.b3 Be6 14.O-O Qd7 15.f4 
Nf7 16.Bd4 Bxd4+ 17.Qxd4 a6 18.b4 b5 19.Nd5 cxd5 20.cxd5 Qa7 21.Qxa7 Rxa7 
22.dxe6 Nd8 23.Rcd1 Kg7 24.Rxd6 Kf6 25.Rc1 Ke7 26.Rb6 Re8 27.Bd5 h6 28.g4 
h5 29.g5 Rh8 30.Kf2 Rf8 31.Kf3 Rh8 32.Bb7 a5 33.bxa5 Rxa5 34.Rc7+ Ke8 35.
Bc8 Ra3+ 36.e3 Rxa2 37.Bd7+ Kf8 38.Bxb5 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.19"]
[Round "9"]
[White "Roessel, Fritz"]
[Black "Barendregt, Johan"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "80"]
[ECO "A38"]

1.Nf3 Nf6 2.g3 g6 3.Bg2 Bg7 4.c4 O-O 5.O-O c5 6.d4 cxd4 7.Nxd4 Nc6 8.Nc2 
d6 9.Nc3 Be6 10.b3 Qd7 11.Rb1 Rad8 12.Ne3 Bh3 13.Qd2 Bxg2 14.Kxg2 Nh5 15.
Bb2 f5 16.f4 g5 17.Rbd1 gxf4 18.gxf4 Bh6 19.Nc2 Ne5 20.e3 Ng4 21.h3 Ngf6 
22.Kh2 Kf7 23.Rg1 Rg8 24.Qf2 Rg6 25.Nd4 Rdg8 26.Nf3 Qe6 27.Nd4 Qc8 28.Rxg6
hxg6 29.Nf3 Rh8 30.Qg2 Qc5 31.Qg1 Ng4+ 32.hxg4 Bxf4+ 33.Kg2 Bxe3 34.Na4 
Nf4+ 35.Kf1 Qc6 36.Qxe3 Rh1+ 37.Kf2 Nh3+ 38.Ke2 f4 39.Qd3 Rh2+ 40.Nxh2 
Qg2+ 0-1

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.19"]
[Round "9"]
[White "Spanjaard, Eduard"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "97"]
[ECO "E14"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.e3 Bb7 5.Bd3 d5 6.O-O Bd6 7.b3 O-O 8.Bb2 Ne4 
9.Nbd2 Nd7 10.Qc2 f5 11.Ne5 Bxe5 12.dxe5 Ndc5 13.Bxe4 Nxe4 14.Rad1 Nxd2 
15.Rxd2 c5 16.f4 Qe7 17.Rfd1 Rad8 18.Ba3 g5 19.cxd5 Bxd5 20.Qd3 h6 21.Qe2 
Kh7 22.Bb2 Rg8 23.Qh5 gxf4 24.exf4 Qb7 25.Qh4 Rd7 26.g3 Rdg7 27.Qh3 Rg4 
28.Qh5 Rd8 29.Rd3 Rg7 30.Qh4 Bh1 31.Qh3 Rxd3 32.Rxd3 Bd5 33.Qf1 c4 34.Rc3 
cxb3 35.axb3 Qe7 36.Qb5 h5 37.Qe2 Kh6 38.Qa6 Qb4 39.Qd3 Rd7 40.Kf2 h4 41.
Bc1 Bc6 42.Qc4 Qxc4 43.Rxc4 Bd5 44.Rc3 Kh5 45.b4 Bb7 46.Ra3 Be4 47.gxh4 
Kxh4 48.Be3 Rg7 49.Kf1 1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.19"]
[Round "9"]
[White "Van Donk, Henk"]
[Black "Cortlever, Nicolaas"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "76"]
[ECO "C80"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.Nxe5 
Nxe5 9.dxe5 c6 10.c3 Be7 11.Be3 O-O 12.Nd2 f5 13.f4 Nc5 14.Qe2 Be6 15.Bc2 
Qc8 16.Qf2 Nb7 17.Nf3 Kh8 18.Rad1 a5 19.a4 b4 20.h3 c5 21.g4 Qc6 22.Qg2 g6
23.g5 Rac8 24.Rd2 d4 25.cxd4 c4 26.Rc1 Bd5 27.Rf2 Qb6 28.Qf1 Nd8 29.h4 Ne6
30.h5 Kg7 31.Nh4 Nxd4 32.Qh3 Bc5 33.hxg6 hxg6 34.Rd1 Rh8 35.Bxd4 Rxh4 36.
Qxh4 Rh8 37.Bxc5 Qxc5 38.Rxd5 Qxd5 0-1

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.19"]
[Round "9"]
[White "Van Weezel, Chr"]
[Black "Orbaan, Constant"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "115"]
[ECO "E60"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 O-O 5.e3 d6 6.Be2 Nbd7 7.O-O c6 8.b3 Re8 
9.Bb2 Qc7 10.Rc1 Nf8 11.Qd2 Bf5 12.Nh4 Bd7 13.f4 Rad8 14.Qe1 e5 15.fxe5 
dxe5 16.Qg3 Bc8 17.Rf2 Qe7 18.d5 cxd5 19.cxd5 a6 20.Rcf1 b5 21.a3 N8d7 22.
b4 Rf8 23.e4 Ne8 24.Nf3 Nd6 25.Bc1 Bb7 26.Bd3 Rc8 27.Nb1 Rc7 28.Qh3 Rfc8 
29.Bd2 f6 30.Qg4 Nb6 31.Be3 Nbc4 32.Bc5 Qd7 33.Qh4 Ra8 34.Bxc4 Nxc4 35.
Nfd2 Nxd2 36.Nxd2 Qc8 37.Nb3 Rf7 38.Rc1 Qd7 39.Be3 Rc8 40.Nc5 Qe8 41.Rd1 
Ra8 42.Rfd2 Bc8 43.Rf2 a5 44.Bd2 axb4 45.Bxb4 f5 46.Qg3 f4 47.Qb3 g5 48.
Rc2 Bg4 49.Rd3 Bf8 50.d6 Kh8 51.Qd5 Rd8 52.Nb7 Rdd7 53.Na5 Bg7 54.Rdc3 Be6
55.Rc8 Rd8 56.Rxd8 Qxd8 57.Qxe6 Qb6+ 58.Kf1 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.19"]
[Round "9"]
[White "Van den Berg, Carel"]
[Black "Van Scheltinga, Theodore"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "81"]
[ECO "A54"]

1.d4 Nf6 2.c4 d6 3.Nf3 Nbd7 4.Nc3 e5 5.Bg5 c6 6.e3 Be7 7.Qc2 O-O 8.Be2 Re8
9.O-O a6 10.Rfd1 Qc7 11.b4 Nf8 12.h3 Ng6 13.Nh4 a5 14.Nxg6 hxg6 15.b5 Nh7 
16.Bxe7 Qxe7 17.bxc6 bxc6 18.Bf3 Bf5 19.Qa4 e4 20.Be2 Bd7 21.Rab1 Qh4 22.
Rb7 Bc8 23.Rc7 Bxh3 24.Qxc6 Rad8 25.Nd5 Bg4 26.Nf4 Bxe2 27.Nxe2 Nf6 28.Ng3
Ng4 29.Qd5 Re6 30.Nxe4 Rf8 31.Rxf7 Qh2+ 32.Kf1 Nxe3+ 33.fxe3 Rxf7+ 34.Ke2 
Qxg2+ 35.Kd3 Qf3 36.Rb1 Qf5 37.Rb8+ Rf8 38.Rxf8+ Kxf8 39.Qa8+ Kf7 40.Qb7+ 
Kg8 41.Qc8+ 1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.20"]
[Round "10"]
[White "Barendregt, Johan"]
[Black "Van Donk, Henk"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "0"]

1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.20"]
[Round "10"]
[White "Cortlever, Nicolaas"]
[Black "Van den Berg, Carel"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "61"]
[ECO "B55"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3 e5 6.Nb3 Be6 7.c4 Be7 8.Be3 O-O
9.Qd2 Qc7 10.Na3 a6 11.Be2 Nbd7 12.O-O b6 13.Rac1 Rfc8 14.Rfd1 Qb7 15.Bf1 
Rc7 16.Na1 h6 17.N1c2 Kh7 18.Nb4 Nc5 19.Nb1 Rd8 20.Nc3 Qa8 21.Rc2 Rdc8 22.
Rdc1 Ncd7 23.Ncd5 Bxd5 24.cxd5 Rxc2 25.Rxc2 Rxc2 26.Qxc2 Nc5 27.Nc6 Bf8 
28.b4 Ncd7 29.Qa4 Nb8 30.Nxb8 Qxb8 31.Qxa6 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.20"]
[Round "10"]
[White "Jonkman, Meinard"]
[Black "Roessel, Fritz"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "77"]
[ECO "E15"]

1.Nf3 Nf6 2.d4 e6 3.c4 b6 4.g3 Ba6 5.e3 Bb4+ 6.Bd2 Bxd2+ 7.Nbxd2 O-O 8.Rc1
c5 9.Bg2 Nc6 10.O-O Rc8 11.Qa4 Bb7 12.dxc5 bxc5 13.Rfd1 Qe7 14.Nb3 d6 15.
Ne1 Rfd8 16.Nd3 e5 17.Na5 Nxa5 18.Qxa5 Bxg2 19.Kxg2 Qb7+ 20.Kg1 Ne4 21.Qb5
Qe7 22.Qa4 Ng5 23.h4 Nf3+ 24.Kg2 Qb7 25.Kh3 g5 26.Ne1 gxh4 27.Rd5 Ng5+ 28.
Kxh4 Qe7 29.Qc2 Qe6 30.Kxg5 Kh8 31.Kh4 Rg8 32.Qe2 Rg6 33.g4 Rcg8 34.f3 f5 
35.Rcd1 fxg4 36.Rxd6 Rh6+ 37.Kg3 gxf3+ 38.Kxf3 Qg4+ 39.Kf2 0-1

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.20"]
[Round "10"]
[White "Orbaan, Constant"]
[Black "Spanjaard, Eduard"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "64"]
[ECO "E79"]

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.Nxc6 Bxe2 11.Nxd8 Bxd1 12.Rxd1 Rfxd8 13.Bd4 a6 14.O-O b5 15.
cxb5 axb5 16.a3 Rdb8 17.Rf2 b4 18.axb4 Ng4 19.Bxg7 Nxf2 20.Kxf2 Kxg7 21.b5
Rb6 22.Rd4 Ra1 23.Rb4 Kf8 24.b3 Ke8 25.Na4 Rb7 26.b6 Kd7 27.Rc4 Rb8 28.e5 
Ra3 29.exd6 exd6 30.Rc3 Rc8 31.b7 Rxc3 32.b8=Q Ra2+ 0-1

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.20"]
[Round "10"]
[White "Van Scheltinga, Theodore"]
[Black "Van Weezel, Chr"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "81"]
[ECO "B38"]

1.c4 c5 2.Nf3 Nf6 3.Nc3 Nc6 4.d4 cxd4 5.Nxd4 g6 6.e4 d6 7.f3 Bg7 8.Be3 O-O
9.Qd2 Bd7 10.Be2 a6 11.O-O Rc8 12.Rac1 Nxd4 13.Bxd4 Be6 14.b3 Qa5 15.Rc2 
Rfe8 16.Kh1 Nd7 17.Bxg7 Kxg7 18.f4 f6 19.Qe3 b5 20.Nd5 Bxd5 21.exd5 bxc4 
22.Bxc4 Nb6 23.f5 Nd7 24.fxg6 hxg6 25.Qe1 Qxe1 26.Rxe1 Ne5 27.Rec1 a5 28.
Bb5 Rxc2 29.Rxc2 Rb8 30.a4 Rb7 31.Kg1 g5 32.b4 axb4 33.Rb2 f5 34.Rxb4 Ra7 
35.h3 Kf6 36.Kf2 Ng6 37.Bc6 Nf4 38.Rb8 Ke5 39.Ra8 Rc7 40.Ra5 Kd4 41.Rb5 
1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.22"]
[Round "11"]
[White "Donner, Jan"]
[Black "Orbaan, Constant"]
[Result "1-0"]
[EventDate "1958.12.10"]
[PlyCount "63"]
[ECO "E80"]

1.d4 Nf6 2.c4 d6 3.Nc3 g6 4.e4 Bg7 5.f3 c6 6.Be3 a6 7.d5 O-O 8.Nge2 Nbd7 
9.Nd4 c5 10.Nc2 Ne8 11.Qd2 Nc7 12.a4 b6 13.Be2 Nf6 14.O-O Rb8 15.Rab1 a5 
16.f4 Bd7 17.h3 Nfe8 18.b3 Na6 19.Ne1 f5 20.exf5 Bxf5 21.Rc1 Nf6 22.Nf3 
Qc8 23.Bd3 Bxd3 24.Qxd3 Qf5 25.Qd2 Nc7 26.g4 Qd7 27.Ng5 Nfe8 28.Rce1 Bf6 
29.f5 gxf5 30.Rxf5 Ng7 31.Rf2 Be5 32.Qd3 1-0

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.22"]
[Round "11"]
[White "Spanjaard, Eduard"]
[Black "Van Scheltinga, Theodore"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "48"]
[ECO "A54"]

1.d4 Nf6 2.c4 d6 3.Nc3 Nbd7 4.Nf3 e5 5.Bg5 c6 6.e3 Be7 7.Qc2 Qc7 8.Be2 Nf8
9.O-O-O Bg4 10.h3 Bh5 11.dxe5 dxe5 12.Nh4 Bxe2 13.Qxe2 Ne6 14.Bxf6 Bxf6 
15.Nf5 O-O 16.Ne4 Be7 17.Qg4 Rfd8 18.h4 Rxd1+ 19.Rxd1 Rd8 20.h5 Kf8 21.
Nxe7 Rxd1+ 22.Kxd1 Qxe7 23.Qf5 Qd7+ 24.Nd2 Nc5 1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.22"]
[Round "11"]
[White "Van Donk, Henk"]
[Black "Jonkman, Meinard"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "98"]
[ECO "C02"]

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nc6 5.Nf3 Bd7 6.a3 Rc8 7.Be2 Qb6 8.O-O a5 9.
dxc5 Bxc5 10.b4 Be7 11.b5 Nb8 12.Be3 Bc5 13.Nd4 Ne7 14.Nd2 Nf5 15.Nxf5 
exf5 16.Bxc5 Rxc5 17.c4 O-O 18.Nb3 Rxc4 19.Bxc4 dxc4 20.Nd4 Rd8 21.Nf3 
Bxb5 22.Qc2 Qc5 23.Qxf5 g6 24.Qg5 Rd3 25.Rfd1 Qxa3 26.Qd8+ Rxd8 27.Rxd8+ 
Qf8 28.Rxf8+ Kxf8 29.Rxa5 Ba6 30.Nd4 Ke7 31.f4 Kd7 32.Kf2 Nc6 33.Rd5+ Kc7 
34.Nb5+ Bxb5 35.Rxb5 b6 36.Ke3 Kb7 37.Rd5 Ka6 38.Rd7 g5 39.g3 b5 40.Rxf7 
b4 41.e6 b3 42.Kd2 b2 43.Kc2 c3 44.e7 Nd4+ 45.Kb1 Nb3 46.e8=Q Nd2+ 47.Kc2 
b1=Q+ 48.Kxc3 Ne4+ 49.Kd4 Qb4+ 1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.22"]
[Round "11"]
[White "Van Weezel, Chr"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[EventDate "1958.12.10"]
[PlyCount "48"]
[ECO "D94"]

1.d4 d5 2.Nf3 Nf6 3.e3 g6 4.c4 c6 5.Nc3 Bg7 6.Bd3 O-O 7.O-O Bf5 8.b3 Bxd3 
9.Qxd3 c5 10.Bb2 cxd4 11.Nxd4 e5 12.Nc2 dxc4 13.Qxc4 Nc6 14.Rfd1 Qb6 15.
Na4 Qa5 16.Bc3 Qc7 17.Nb4 Rfd8 18.Nxc6 bxc6 19.Rdc1 Nd5 20.Be1 Rac8 21.Qa6
Nb6 22.Ba5 Rb8 23.Rc2 Rd6 24.Rac1 h5 1/2-1/2

[Event "20th NED-ch"]
[Site "Amsterdam NED"]
[Date "1958.12.22"]
[Round "11"]
[White "Van den Berg, Carel"]
[Black "Barendregt, Johan"]
[Result "0-1"]
[EventDate "1958.12.10"]
[PlyCount "70"]
[ECO "C41"]

1.d4 d6 2.e4 Nf6 3.Nc3 e5 4.Nf3 Nbd7 5.Bc4 Be7 6.O-O c6 7.a4 Qc7 8.h3 h6 
9.b3 Nf8 10.Bb2 g5 11.dxe5 dxe5 12.Ne2 Ng6 13.Ng3 g4 14.hxg4 Bxg4 15.Qd3 
Bd6 16.Qe3 O-O-O 17.Nh2 Kb8 18.Nxg4 Nxg4 19.Qf3 h5 20.Qxf7 Nf4 21.Qxc7+ 
Bxc7 22.Rad1 Rxd1 23.Rxd1 h4 24.Nh1 h3 25.g3 h2+ 26.Kf1 Nh3 27.Ke2 Nhxf2 
28.Rf1 Nxh1 29.Rxh1 Rf8 30.Be6 Rf2+ 31.Kd3 Rf3+ 32.Kd2 Ba5+ 33.c3 Rf2+ 34.
Kc1 Rg2 35.Bxg4 Rg1+ 0-1
