[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.03.30"]
[Round "1"]
[White "Bouwmeester, Hans"]
[Black "Visser, Jan"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.03.30"]
[Round "1"]
[White "Cortlever, Nicolaas"]
[Black "Van den Bosch, Johannes"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.03.30"]
[Round "1"]
[White "Donner, Jan"]
[Black "Spanjaard, Eduard"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "97"]
[ECO "E63"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nf3 d6 6.O-O Nc6 7.Nc3 a6 8.e3 Rb8 
9.a3 Bg4 10.h3 Bxf3 11.Bxf3 Qd7 12.Bg2 Na5 13.b3 c5 14.Ne2 b5 15.Bd2 Qc7 
16.cxb5 axb5 17.dxc5 dxc5 18.Rc1 Rfd8 19.Nd4 Qa7 20.Bxa5 Qxa5 21.Rxc5 Qxa3
22.Rxb5 Rxb5 23.Nxb5 Rxd1 24.Nxa3 Rxf1+ 25.Kxf1 Nd7 26.Nc4 Bc3 27.Be4 Nc5 
28.Bc2 Kg7 29.f4 f5 30.Ke2 Kf6 31.g4 h6 32.Nd2 e6 33.Nf3 fxg4 34.hxg4 g5 
35.fxg5+ hxg5 36.Nd4 Ke5 37.b4 Nd7 38.Kd3 Bb2 39.Bb3 Bxd4 40.exd4+ Kd6 41.
Bd1 Nb6 42.Bf3 Ke7 43.Bd1 Nd5 44.b5 Kd6 45.Bf3 Nb6 46.Kc3 e5 47.Kd3 exd4 
48.Kxd4 Nd7 49.Bd1 1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.03.30"]
[Round "1"]
[White "Kramer, Haije"]
[Black "Roessel, Fritz"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "128"]
[ECO "B16"]

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ gxf6 6.c3 Bf5 7.Ne2 e5 8.Ng3
Be6 9.Be3 Qc7 10.Nh5 Nd7 11.Be2 Rg8 12.O-O Bd6 13.f4 O-O-O 14.dxe5 fxe5 
15.Qa4 a6 16.c4 Bg4 17.Qc2 exf4 18.Bd4 Rg6 19.Rae1 Rdg8 20.Kh1 c5 21.Bxg4 
Rxg4 22.Nf6 Nxf6 23.Bxf6 Qc6 24.Rf2 Kb8 25.h3 Rg3 26.Qe4 Qxe4 27.Rxe4 f3 
28.Rxf3 Rxg2 29.Re8+ Rxe8 30.Kxg2 Re4 31.b3 Re2+ 32.Rf2 Rxf2+ 33.Kxf2 Kc8 
34.Ke3 Kd7 35.Bb2 Ke6 36.Bc3 Kf5 37.Kf3 Be5 38.Ba5 Bf4 39.Bb6 Bd6 40.Ba5 
Be5 41.Bb6 Bd6 42.Ba5 Kg5 43.a4 f6 44.Be1 f5 45.Bf2 a5 46.Be1 b6 47.Bc3 
Bc7 48.Bb2 f4 49.Kg2 Kf5 50.Kf3 Be5 51.Bc1 Kg5 52.Bd2 Kh4 53.Kg2 f3+ 54.
Kxf3 Kxh3 55.Bg5 Bc7 56.Bf6 Kh2 57.Ke4 Kg3 58.Kd5 Bf4 59.Bd8 h5 60.Ke4 Bd2
61.Kd3 Bb4 62.Ke2 h4 63.Kf1 h3 64.Kg1 Kf3 0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.03.30"]
[Round "1"]
[White "Orbaan, Constant"]
[Black "Van Scheltinga, Theodore"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.03.30"]
[Round "1"]
[White "Van den Berg, Carel"]
[Black "Barendregt, Johan"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.03.31"]
[Round "2"]
[White "Barendregt, Johan"]
[Black "Kramer, Haije"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.03.31"]
[Round "2"]
[White "Donner, Jan"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "81"]
[ECO "D90"]

1.c4 c6 2.d4 d5 3.Nf3 Nf6 4.Nc3 g6 5.cxd5 cxd5 6.Bf4 Nc6 7.e3 Bg7 8.Be2 
O-O 9.O-O b6 10.Ne5 Bb7 11.Nxc6 Bxc6 12.Qb3 Qd7 13.a4 Ne4 14.Nxe4 dxe4 15.
a5 Bd5 16.Qb4 Qb7 17.a6 Qd7 18.Bb5 Qf5 19.Qxe7 Bxd4 20.Bd7 Be6 21.Bc6 Bf6 
22.Qb4 Rac8 23.Bxe4 Qh5 24.Bf3 Bg4 25.Bxg4 Qxg4 26.Ra2 Rc2 27.Qe4 Rfc8 28.
Qb7 Qe2 29.Raa1 Bxb2 30.Rae1 Qd2 31.Qxa7 Rc1 32.Rxc1 Rxc1 33.Qa8+ Kg7 34.
g3 Rc4 35.Qb7 Qa5 36.a7 Ra4 37.Bb8 Qa6 38.Qd7 Ba3 39.Ra1 b5 40.Be5+ Kh6 
41.Qh3+ 1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.03.31"]
[Round "2"]
[White "Roessel, Fritz"]
[Black "Bouwmeester, Hans"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.03.31"]
[Round "2"]
[White "Spanjaard, Eduard"]
[Black "Visser, Jan"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.03.31"]
[Round "2"]
[White "Van Scheltinga, Theodore"]
[Black "Van den Berg, Carel"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.03.31"]
[Round "2"]
[White "Van den Bosch, Johannes"]
[Black "Orbaan, Constant"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "0"]

0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.01"]
[Round "3"]
[White "Bouwmeester, Hans"]
[Black "Barendregt, Johan"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.01"]
[Round "3"]
[White "Cortlever, Nicolaas"]
[Black "Spanjaard, Eduard"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.01"]
[Round "3"]
[White "Kramer, Haije"]
[Black "Van Scheltinga, Theodore"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.01"]
[Round "3"]
[White "Orbaan, Constant"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "89"]
[ECO "B43"]

1.e4 c5 2.Nc3 a6 3.g3 b5 4.Bg2 Bb7 5.Nge2 Nf6 6.d4 cxd4 7.Nxd4 e6 8.Qe2 
Nc6 9.Nxc6 Bxc6 10.O-O b4 11.e5 Bxg2 12.Kxg2 bxc3 13.exf6 Qxf6 14.Qe4 Qd8 
15.Rd1 Rc8 16.bxc3 Be7 17.Qd3 O-O 18.Qxa6 Rxc3 19.Qa4 d5 20.Bb2 Rc8 21.Rd3
Bf6 22.Rb1 Ra8 23.Bxf6 Qxf6 24.Qb3 Qe5 25.Re3 Qd6 26.Qb2 d4 27.Rb3 Rfc8 
28.Kg1 h6 29.Rb4 e5 30.Rb7 Qd5 31.a3 Qf3 32.Rb3 Qf5 33.Rd3 Ra4 34.Qb7 e4 
35.g4 Qxg4+ 36.Rg3 Qe6 37.Rb6 Qe8 38.Rxh6 Rb8 39.Qd5 Rb5 40.Qd6 Rf5 41.Rh4
f6 42.Rgh3 Rg5+ 43.Kh1 Kf7 44.Rh8 Qe7 45.Qb8 1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.01"]
[Round "3"]
[White "Van den Berg, Carel"]
[Black "Van den Bosch, Johannes"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "53"]
[ECO "D74"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d5 5.cxd5 Nxd5 6.Nf3 O-O 7.O-O c6 8.Nc3 
Nxc3 9.bxc3 Qa5 10.Qb3 Qa6 11.Re1 Nd7 12.Ba3 Re8 13.Ng5 e6 14.Ne4 Nb6 15.
Nd6 Rd8 16.e4 Bf8 17.e5 Bxd6 18.Bxd6 Nc4 19.Be7 Re8 20.Bf6 h6 21.Qc2 Kh7 
22.Re4 Qa3 23.Rb1 Qf8 24.Qd3 b5 25.Rh4 Bd7 26.g4 Kg8 27.Qh3 1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.01"]
[Round "3"]
[White "Visser, Jan"]
[Black "Roessel, Fritz"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "0"]

0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.03"]
[Round "4"]
[White "Barendregt, Johan"]
[Black "Visser, Jan"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.03"]
[Round "4"]
[White "Cortlever, Nicolaas"]
[Black "Orbaan, Constant"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "81"]
[ECO "C06"]

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Nd7 5.Bd3 Ne7 6.Ne2 Qb6 7.Nd2 Nc6 8.Nf3 Be7 
9.a3 Nf8 10.b4 cxd4 11.cxd4 Bd7 12.O-O Ng6 13.Be3 O-O 14.Nd2 Be8 15.Nb3 a5
16.b5 Na7 17.a4 Qd8 18.f4 Bd7 19.Bd2 b6 20.g4 f5 21.Ng3 Nh4 22.Kh1 fxg4 
23.Qxg4 g6 24.Nc1 Rf7 25.Nce2 Kh8 26.Ng1 Qg8 27.Nf3 Nxf3 28.Rxf3 Raf8 29.
Rg1 Rg7 30.Ne2 Nc8 31.Rh3 Bd8 32.f5 exf5 33.Qg2 f4 34.Nxf4 Bxh3 35.Qxh3 
Rxf4 36.Bxf4 Ne7 37.e6 Qf8 38.Be5 Kg8 39.Rf1 Nf5 40.Bxf5 gxf5 41.Bxg7 1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.03"]
[Round "4"]
[White "Donner, Jan"]
[Black "Van den Berg, Carel"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "103"]
[ECO "C63"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.d3 fxe4 5.dxe4 Nf6 6.O-O d6 7.Qd3 Bg4 8.Nc3 
Be7 9.Nh4 O-O 10.f3 Bd7 11.Bc4+ Kh8 12.Nf5 Bxf5 13.exf5 Nb4 14.Qe2 d5 15.
Rd1 c6 16.a3 Nxc2 17.Qxc2 Qb6+ 18.Kh1 dxc4 19.Qe2 Rad8 20.Qxe5 Rxd1+ 21.
Nxd1 Nd5 22.Rb1 Bf6 23.Qe4 Qb3 24.Ne3 Rd8 25.Nf1 Qd3 26.Bd2 b5 27.Re1 h6 
28.Bc1 Ne7 29.Ne3 c3 30.b3 a5 31.Ng4 Rd4 32.Qxd3 Rxd3 33.Nxf6 gxf6 34.g4 
c2 35.Kg2 Nd5 36.Re2 Rxb3 37.Rxc2 Rc3 38.Rxc3 Nxc3 39.Bb2 Nd5 40.Kf2 Kg8 
41.Ke2 Kf7 42.Kd3 b4 43.Bc1 h5 44.axb4 axb4 45.Kc4 Nc3 46.h3 Nd1 47.Kxb4 
h4 48.Kc5 Nf2 49.Be3 Nd3+ 50.Kxc6 Ne5+ 51.Kd5 Nxf3 52.Ke4 1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.03"]
[Round "4"]
[White "Spanjaard, Eduard"]
[Black "Roessel, Fritz"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "65"]
[ECO "A29"]

1.Nf3 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.O-O d6 6.Nc3 Nc6 7.Rb1 e5 8.b4 Ne8 
9.b5 Ne7 10.Qb3 h6 11.Rd1 f5 12.Ne1 Kh8 13.d3 f4 14.gxf4 exf4 15.Bb2 Nf5 
16.Nf3 g5 17.Nd5 g4 18.Bxg7+ Nexg7 19.Ne1 f3 20.exf3 Nd4 21.Qb2 Nxf3+ 22.
Nxf3 gxf3 23.Bf1 c6 24.bxc6 bxc6 25.Nc3 Qh4 26.Ne4 Bh3 27.Kh1 Be6 28.Re1 
Rf4 29.Nxd6 Rg8 30.Rxe6 Kh7 31.Re4 Ne6 32.Rxf4 Qg5 33.Rf7+ 1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.03"]
[Round "4"]
[White "Van Scheltinga, Theodore"]
[Black "Bouwmeester, Hans"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "0"]

0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.03"]
[Round "4"]
[White "Van den Bosch, Johannes"]
[Black "Kramer, Haije"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "0"]

0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.04"]
[Round "5"]
[White "Bouwmeester, Hans"]
[Black "Van den Bosch, Johannes"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.04"]
[Round "5"]
[White "Kramer, Haije"]
[Black "Donner, Jan"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "90"]
[ECO "B91"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g3 b5 7.Bg2 e5 8.Nde2 Bb7
9.O-O Nbd7 10.Nd5 Nxd5 11.exd5 Be7 12.Kh1 O-O 13.f4 Qc7 14.Be3 Nb6 15.Bxb6
Qxb6 16.Qd3 exf4 17.Nxf4 Bf6 18.c3 Rae8 19.Be4 g6 20.Nh5 Be5 21.Nf6+ Bxf6 
22.Rxf6 Qc5 23.b4 Qc7 24.Raf1 Re5 25.Bg2 Bc8 26.R6f4 Qe7 27.c4 Bd7 28.c5 
dxc5 29.d6 Qe6 30.bxc5 Rxc5 31.Qd2 Re5 32.Rh4 h5 33.Bf3 Rc8 34.Kg1 Rec5 
35.Bd1 Rd5 36.Qh6 Qxd6 37.Bb3 Qc5+ 38.Kg2 Be6 39.Bxd5 Bxd5+ 40.Kh3 Qc2 41.
Rhf4 Qg2+ 42.Kh4 Qxh2+ 43.Kg5 Qxg3+ 44.Kf6 Rc6+ 45.Ke7 Qe3+ 0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.04"]
[Round "5"]
[White "Orbaan, Constant"]
[Black "Spanjaard, Eduard"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "66"]
[ECO "A48"]

1.d4 Nf6 2.Nf3 g6 3.g3 Bg7 4.Bg2 O-O 5.b3 d5 6.Bb2 c6 7.O-O Bf5 8.Ne5 Nbd7
9.Nd3 Re8 10.Nd2 e5 11.dxe5 Ng4 12.e6 Rxe6 13.Bxg7 Kxg7 14.Nf4 Re8 15.c4 
d4 16.Nf3 c5 17.Nh4 Be4 18.e3 Bxg2 19.Kxg2 Nde5 20.exd4 cxd4 21.Nd5 d3 22.
f4 Qxd5+ 23.cxd5 Ne3+ 24.Kh3 Nxd1 25.Raxd1 Nd7 26.Rxd3 Re2 27.Rc1 Nf6 28.
Nf3 Rd8 29.Rcd1 Ne4 30.Kh4 h6 31.h3 f5 32.g4 g5+ 33.Nxg5 hxg5+ 0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.04"]
[Round "5"]
[White "Roessel, Fritz"]
[Black "Barendregt, Johan"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.04"]
[Round "5"]
[White "Van den Berg, Carel"]
[Black "Cortlever, Nicolaas"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.04"]
[Round "5"]
[White "Visser, Jan"]
[Black "Van Scheltinga, Theodore"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "0"]

0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.06"]
[Round "6"]
[White "Cortlever, Nicolaas"]
[Black "Kramer, Haije"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.06"]
[Round "6"]
[White "Donner, Jan"]
[Black "Bouwmeester, Hans"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "101"]
[ECO "A99"]

1.d4 f5 2.Nf3 Nf6 3.g3 e6 4.Bg2 Be7 5.O-O O-O 6.c4 d6 7.Nc3 Qe8 8.b3 a5 9.
Ba3 Na6 10.Re1 Qg6 11.Ne5 Qe8 12.Nd3 e5 13.dxe5 dxe5 14.Bxe7 Qxe7 15.e4 
fxe4 16.Nxe4 Bf5 17.Nc3 e4 18.f3 e3 19.Ne4 Rad8 20.Rxe3 Nc5 21.Qe2 Bxe4 
22.Nf2 Rd4 23.fxe4 Qe5 24.Rd1 Rfd8 25.Rxd4 Rxd4 26.Bf3 g6 27.a3 c6 28.b4 
axb4 29.axb4 Ne6 30.Nd3 Qg5 31.e5 Nd7 32.Re4 Rxe4 33.Qxe4 Qd2 34.h4 Qc3 
35.Bg4 Ndf8 36.Kg2 Qd2+ 37.Kh3 Qc3 38.c5 Qc2 39.Qe2 Qc4 40.Kg2 Qd4 41.Qf3 
Qc4 42.Bh3 Qc3 43.Kh2 Qd2+ 44.Bg2 Nd4 45.Qe4 Nfe6 46.Nf4 Nxf4 47.Qxf4 Qxf4
48.gxf4 Nc2 49.b5 cxb5 50.Bxb7 Kf8 51.c6 1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.06"]
[Round "6"]
[White "Orbaan, Constant"]
[Black "Van den Berg, Carel"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.06"]
[Round "6"]
[White "Spanjaard, Eduard"]
[Black "Barendregt, Johan"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "78"]
[ECO "B06"]

1.d4 d6 2.Nf3 g6 3.e4 Bg7 4.Bc4 e6 5.O-O Ne7 6.Nc3 O-O 7.Bg5 f6 8.Be3 Kh8 
9.Qd2 d5 10.Be2 Ng8 11.h4 Nc6 12.h5 gxh5 13.g3 Nce7 14.Kg2 Bd7 15.Rh1 Be8 
16.e5 Nf5 17.exf6 Nxf6 18.Bg5 h6 19.Bf4 Nd7 20.Ne5 Nxe5 21.dxe5 d4 22.Ne4 
Qd5 23.Bf3 Bxe5 24.Bxh6 Ng7 25.Nf6 Qxf3+ 26.Kxf3 Rxf6+ 27.Ke2 Nf5 28.Bf4 
d3+ 29.cxd3 Nd4+ 30.Kf1 Bxf4 31.gxf4 Bg6 32.Rc1 Raf8 33.Rxc7 Rxf4 34.Rc8 
Kh7 35.Rxf8 Rxf8 36.Qb4 Bxd3+ 37.Kg2 Rg8+ 38.Kh3 Bf5+ 39.Kh4 Nf3+ 0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.06"]
[Round "6"]
[White "Van Scheltinga, Theodore"]
[Black "Roessel, Fritz"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.06"]
[Round "6"]
[White "Van den Bosch, Johannes"]
[Black "Visser, Jan"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.07"]
[Round "7"]
[White "Barendregt, Johan"]
[Black "Van Scheltinga, Theodore"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.07"]
[Round "7"]
[White "Bouwmeester, Hans"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.07"]
[Round "7"]
[White "Kramer, Haije"]
[Black "Orbaan, Constant"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.07"]
[Round "7"]
[White "Roessel, Fritz"]
[Black "Van den Bosch, Johannes"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "0"]

0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.07"]
[Round "7"]
[White "Van den Berg, Carel"]
[Black "Spanjaard, Eduard"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "63"]
[ECO "E66"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nc3 d6 6.Nf3 Nc6 7.O-O Rb8 8.d5 Na5 
9.Nd2 c5 10.Qc2 e6 11.b3 exd5 12.cxd5 b5 13.Bb2 b4 14.Nd1 Ba6 15.Re1 Nd7 
16.Bxg7 Kxg7 17.Ne3 f5 18.a3 Rb5 19.Nec4 Nxc4 20.Nxc4 Nb8 21.e4 Rb7 22.e5 
Bxc4 23.Qxc4 bxa3 24.exd6 Nd7 25.Rxa3 Qf6 26.Ra6 f4 27.Qxf4 Qxf4 28.gxf4 
Rxf4 29.Rc6 Rxb3 30.Rc7 Rb2 31.Rxd7+ Kh6 32.Rf1 1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.07"]
[Round "7"]
[White "Visser, Jan"]
[Black "Donner, Jan"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "112"]
[ECO "E48"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Ne2 c5 7.a3 dxc4 8.Bxc4 
cxd4 9.axb4 dxc3 10.Qxd8 Rxd8 11.bxc3 Nbd7 12.O-O Nb6 13.Bb3 Bd7 14.c4 
Rdc8 15.c5 Nbd5 16.Bxd5 Nxd5 17.Rd1 Rd8 18.Bd2 a6 19.e4 Nf6 20.Bf4 Bb5 21.
Nc3 Bc6 22.f3 Nd7 23.Rd6 Re8 24.Rad1 Nf8 25.R6d2 Ng6 26.Bc7 Rac8 27.Bb6 
Kf8 28.Kf2 Ne5 29.Rd4 Ke7 30.Ra1 g5 31.Ne2 h5 32.Ng3 h4 33.Nf1 Bb5 34.Ne3 
Nc6 35.Rd6 Nxb4 36.Rad1 Na2 37.R1d2 Nc3 38.Nc2 Na4 39.Nd4 Nxb6 40.Rxb6 
Rxc5 41.Rxb7+ Kf6 42.Nxb5 Rxb5 43.Ra7 Ra5 44.g3 Rc8 45.e5+ Kg6 46.gxh4 
gxh4 47.Kg2 Rc3 48.Rf2 Re3 49.f4 h3+ 50.Kg1 Ra1+ 51.Rf1 Ra2 52.Ra8 Rg2+ 
53.Kh1 Ree2 54.Rg1 Kf5 55.Rxg2 hxg2+ 56.Kg1 Kxf4 0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.08"]
[Round "8"]
[White "Cortlever, Nicolaas"]
[Black "Visser, Jan"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.08"]
[Round "8"]
[White "Donner, Jan"]
[Black "Roessel, Fritz"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "87"]
[ECO "E62"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nf3 d6 6.O-O Nc6 7.Nc3 Rb8 8.a3 Na5 
9.Nd2 c5 10.d5 Bd7 11.b4 cxb4 12.axb4 Nxc4 13.Nxc4 Qc7 14.Qd3 Rfc8 15.Nxd6
exd6 16.Nb5 Bxb5 17.Qxb5 Ne4 18.Rxa7 Bd4 19.Be3 Bxa7 20.Bxa7 Ra8 21.Bxe4 
Rxa7 22.Bd3 Rca8 23.Kg2 Kg7 24.h4 h5 25.Rb1 Ra2 26.Qc4 Qxc4 27.Bxc4 Ra1 
28.Rb2 Rc8 29.Bd3 Kf6 30.f4 Rcc1 31.Rb3 Kg7 32.Kh3 Kh6 33.Kg2 f6 34.b5 b6 
35.Kf3 f5 36.e4 fxe4+ 37.Kxe4 Ra4+ 38.Ke3 Rc5 39.Kf3 Rxd5 40.Be2 Kg7 41.
Re3 Kf6 42.Rb3 Rc5 43.Bd3 d5 44.Ke3 0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.08"]
[Round "8"]
[White "Orbaan, Constant"]
[Black "Bouwmeester, Hans"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "56"]
[ECO "A47"]

1.d4 Nf6 2.Nf3 e6 3.e3 c5 4.Bd3 b6 5.O-O Bb7 6.b3 Be7 7.Bb2 O-O 8.Nbd2 
cxd4 9.Nxd4 Na6 10.Be2 Nc5 11.c4 Rc8 12.Nb5 a6 13.Nc3 d6 14.Rc1 Rc7 15.Re1
Qa8 16.Bf1 Rd8 17.Qe2 Ne8 18.e4 Bf6 19.Nd1 Bxb2 20.Nxb2 Nf6 21.f3 Bc6 22.
Nb1 e5 23.Qf2 Qb7 24.Nc3 b5 25.Nd5 Bxd5 26.cxd5 Rdc8 27.Qe3 Ncxe4 28.fxe4 
Ng4 0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.08"]
[Round "8"]
[White "Spanjaard, Eduard"]
[Black "Van Scheltinga, Theodore"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.08"]
[Round "8"]
[White "Van den Berg, Carel"]
[Black "Kramer, Haije"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "59"]
[ECO "E59"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O Nc6 8.a3 Bxc3 
9.bxc3 dxc4 10.Bxc4 Qc7 11.Bb2 e5 12.h3 e4 13.Nd2 Na5 14.Ba2 c4 15.f3 Bxh3
16.Nxe4 Nxe4 17.fxe4 f6 18.e5 Bd7 19.exf6 Rxf6 20.Rxf6 gxf6 21.Qh5 Rf8 22.
Rf1 Be8 23.Qh4 Qg7 24.e4 Bg6 25.Bc1 Re8 26.e5 f5 27.Bg5 Qd7 28.Bf6 b5 29.
Bb1 Kf7 30.Qh3 1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.08"]
[Round "8"]
[White "Van den Bosch, Johannes"]
[Black "Barendregt, Johan"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.10"]
[Round "9"]
[White "Barendregt, Johan"]
[Black "Donner, Jan"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "0"]

0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.10"]
[Round "9"]
[White "Bouwmeester, Hans"]
[Black "Van den Berg, Carel"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.10"]
[Round "9"]
[White "Kramer, Haije"]
[Black "Spanjaard, Eduard"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.10"]
[Round "9"]
[White "Roessel, Fritz"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.10"]
[Round "9"]
[White "Van Scheltinga, Theodore"]
[Black "Van den Bosch, Johannes"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.10"]
[Round "9"]
[White "Visser, Jan"]
[Black "Orbaan, Constant"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.11"]
[Round "10"]
[White "Cortlever, Nicolaas"]
[Black "Barendregt, Johan"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "75"]
[ECO "A40"]

1.e4 c5 2.Nf3 g6 3.c4 Bg7 4.d4 d6 5.Be3 Qb6 6.Nc3 Bg4 7.Nd5 Qa5+ 8.Bd2 Qd8
9.dxc5 dxc5 10.Qa4+ Bd7 11.Qa3 e6 12.Bc3 Bxc3+ 13.Nxc3 Qe7 14.O-O-O Bc6 
15.Nd5 exd5 16.exd5 Kf8 17.dxc6 Nxc6 18.Bd3 Nb4 19.Bb1 Kg7 20.Qc3+ Qf6 21.
Rd7 Nh6 22.Qxf6+ Kxf6 23.Rxb7 Rhe8 24.Rd1 Re2 25.a3 Nc6 26.Rd6+ Re6 27.
Rxe6+ Kxe6 28.Ng5+ Kf6 29.Nxh7+ Ke5 30.Ng5 Kd4 31.Nxf7 Nf5 32.Rd7+ Kxc4 
33.Nd6+ Nxd6 34.Rxd6 Nd4 35.Bxg6 Rb8 36.h4 Ne2+ 37.Kb1 Nd4 38.h5 1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.11"]
[Round "10"]
[White "Donner, Jan"]
[Black "Van Scheltinga, Theodore"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "97"]
[ECO "D31"]

1.d4 d5 2.c4 e6 3.cxd5 exd5 4.Nc3 c6 5.Nf3 Bf5 6.Bf4 Ne7 7.e3 Ng6 8.Bg3 
Nd7 9.Bd3 Bxd3 10.Qxd3 Be7 11.h4 h5 12.O-O-O Nf6 13.Ne5 Rh6 14.Kb1 Qc8 15.
f3 Nd7 16.e4 dxe4 17.Nxe4 Kf8 18.Nc4 Nb6 19.Ned6 Bxd6 20.Bxd6+ Kg8 21.Nxb6
axb6 22.d5 Ra5 23.dxc6 bxc6 24.Qc2 Qe6 25.a3 Qf5 26.Qxf5 Rxf5 27.Bc7 b5 
28.Rd6 Nf4 29.Rxh6 gxh6 30.Rc1 Nd3 31.Rxc6 Kh7 32.Bg3 Nf4 33.Bxf4 Rxf4 34.
Rc5 Rxh4 35.Rxb5 Rh2 36.a4 h4 37.Ka2 Rxg2 38.Rh5 Rg3 39.Rxh4 Rxf3 40.a5 
Rf6 41.b4 Ra6 42.Kb3 Kg6 43.Ka4 f5 44.b5 Rf6 45.b6 f4 46.b7 Rf8 47.a6 f3 
48.a7 f2 49.Rh1 1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.11"]
[Round "10"]
[White "Kramer, Haije"]
[Black "Bouwmeester, Hans"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.11"]
[Round "10"]
[White "Orbaan, Constant"]
[Black "Roessel, Fritz"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "0"]

0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.11"]
[Round "10"]
[White "Spanjaard, Eduard"]
[Black "Van den Bosch, Johannes"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.11"]
[Round "10"]
[White "Van den Berg, Carel"]
[Black "Visser, Jan"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.13"]
[Round "11"]
[White "Barendregt, Johan"]
[Black "Orbaan, Constant"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.13"]
[Round "11"]
[White "Bouwmeester, Hans"]
[Black "Spanjaard, Eduard"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.13"]
[Round "11"]
[White "Roessel, Fritz"]
[Black "Van den Berg, Carel"]
[Result "1-0"]
[EventDate "1957.03.30"]
[PlyCount "71"]
[ECO "A49"]

1.Nf3 Nf6 2.g3 g6 3.Bg2 Bg7 4.d4 O-O 5.b3 c5 6.Bb2 cxd4 7.Nxd4 Nc6 8.c4 
Qa5+ 9.Bc3 Qc5 10.Nc2 d6 11.Ne3 Be6 12.O-O Rac8 13.a3 b5 14.b4 Qb6 15.cxb5
Qxb5 16.a4 Qb8 17.b5 Ne5 18.Bd4 Nc4 19.Nxc4 Rxc4 20.Na3 Rxd4 21.Qxd4 Nd7 
22.Qb4 Bxa1 23.Rxa1 Rc8 24.h4 h5 25.a5 Qc7 26.Rb1 d5 27.b6 axb6 28.axb6 
Qc5 29.Qxc5 Nxc5 30.Nb5 Rb8 31.Nc7 Na4 32.b7 Nc5 33.Nxd5 Rxb7 34.Rxb7 Nxb7
35.Nxe7+ Kf8 36.Nxg6+ 1-0

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.13"]
[Round "11"]
[White "Van Scheltinga, Theodore"]
[Black "Cortlever, Nicolaas"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.13"]
[Round "11"]
[White "Van den Bosch, Johannes"]
[Black "Donner, Jan"]
[Result "0-1"]
[EventDate "1957.03.30"]
[PlyCount "82"]
[ECO "B30"]

1.e4 c5 2.Nf3 Nc6 3.Bb5 Nf6 4.Nc3 Nd4 5.e5 Nxb5 6.Nxb5 Nd5 7.O-O a6 8.c4 
Nb4 9.Nc3 Nc6 10.Re1 e6 11.d4 cxd4 12.Nxd4 d6 13.Nxc6 bxc6 14.exd6 Bxd6 
15.Qh5 O-O 16.c5 Be7 17.Bf4 f5 18.Rad1 Qa5 19.Bd6 Bxd6 20.cxd6 Bd7 21.Ne4 
e5 22.Ng5 h6 23.Nf3 e4 24.Rxe4 Be8 25.Rxe8 Raxe8 26.d7 Re4 27.h3 Qc7 28.
Nh4 Rd8 29.Qxf5 Rxd7 30.Qxd7 Re1+ 31.Rxe1 Qxd7 32.Nf3 Qd3 33.Rc1 a5 34.b3 
Qe4 35.a3 Qd3 36.b4 Qxa3 37.Rxc6 Qxb4 38.h4 a4 39.h5 a3 40.Rc8+ Kh7 41.Ra8
a2 0-1

[Event "19th NED-ch"]
[Site "Amsterdam NED"]
[Date "1957.04.13"]
[Round "11"]
[White "Visser, Jan"]
[Black "Kramer, Haije"]
[Result "1/2-1/2"]
[EventDate "1957.03.30"]
[PlyCount "0"]

1/2-1/2
