[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.23"]
[Round "1"]
[White "Hartoch, Robert"]
[Black "Scholl, Eduard"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "28"]
[ECO "A24"]

1.c4 g6 2.g3 Bg7 3.Bg2 e5 4.Nc3 d6 5.e3 Nf6 6.Nge2 O-O 7.O-O Re8 8.e4 Nc6 
9.d3 Nh5 10.Be3 Nd4 11.Qd2 c6 12.Rae1 Be6 13.Bh6 Nxe2+ 14.Rxe2 Rb8 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.23"]
[Round "1"]
[White "Jongsma, Alexander"]
[Black "Kort, Jacob"]
[Result "1-0"]
[EventDate "1970.03.23"]
[PlyCount "81"]
[ECO "A40"]

1.Nf3 g6 2.d4 Bg7 3.Nc3 d6 4.g3 Nd7 5.Bg2 e6 6.O-O Ne7 7.e4 a6 8.a4 b6 9.
Be3 Bb7 10.Qd2 h6 11.Ne1 c6 12.Nd3 Qc7 13.f4 d5 14.Ne5 Rd8 15.exd5 exd5 
16.Bf2 Nf6 17.Qe2 O-O 18.g4 c5 19.a5 bxa5 20.dxc5 d4 21.Na4 Bxg2 22.Kxg2 
Rfe8 23.Qf3 g5 24.fxg5 hxg5 25.Bg3 Ned5 26.Nc4 Qc6 27.Kg1 Re4 28.Ne5 Qb5 
29.Nxf7 Re3 30.Nxd8 Rxf3 31.Rxf3 Qd7 32.Rb3 Nb4 33.Rxb4 axb4 34.c6 Qxd8 
35.c7 Qf8 36.Nb6 Nxg4 37.c8=Q Qxc8 38.Nxc8 Ne3 39.Rxa6 Nxc2 40.Ne7+ Kf7 
41.Nf5 1-0

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.23"]
[Round "1"]
[White "Langeweg, Christian"]
[Black "De Ruiter, Tom"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "96"]
[ECO "A92"]

1.Nf3 f5 2.g3 Nf6 3.Bg2 e6 4.O-O d5 5.d4 Be7 6.c4 O-O 7.Qc2 c6 8.Nbd2 Qe8 
9.Ne5 Qh5 10.Ndf3 Ne4 11.Nd3 g5 12.Nfe5 Nd7 13.b4 a6 14.f3 Nd6 15.c5 Nf7 
16.Bd2 Ndxe5 17.dxe5 Qg6 18.Rae1 Bd8 19.e4 Bc7 20.Bc3 Bd7 21.Bb2 Rae8 22.
Qc3 h5 23.Qd4 Nh6 24.Rf2 Re7 25.Rd2 Rh7 26.exd5 cxd5 27.f4 g4 28.Nf2 Rd8 
29.Nd1 Bc6 30.Nc3 Qe8 31.Ra1 a5 32.a3 h4 33.Bf1 Qh5 34.b5 Be8 35.Bd3 Nf7 
36.Ne2 Bxe5 37.fxe5 Ng5 38.Rf1 Nf3+ 39.Rxf3 gxf3 40.Nf4 Qh6 41.Qf2 hxg3 
42.Qxf3 gxh2+ 43.Kh1 Rdd7 44.Rg2+ Rdg7 45.Bxf5 exf5 46.Qxd5+ Kh8 47.Qd8 
Rxg2 48.e6+ Rxb2 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.23"]
[Round "1"]
[White "Van der Weide, Piet"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "119"]
[ECO "C25"]

1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.d4 Bg7 6.d5 Ne5 7.h4 h6 8.d6 c6 9.
Nd4 Qf6 10.Nf5 b6 11.Qh5 Ng6 12.Bc4 Bf8 13.Bd2 Bxd6 14.Nxd6+ Qxd6 15.O-O-O
Qe5 16.Nd5 cxd5 17.Bc3 Qxc3 18.bxc3 dxc4 19.hxg5 hxg5 20.Qxg5 Rxh1 21.Rxh1
Bb7 22.Rh7 Bxe4 23.Qb5 Rc8 24.Kb2 Nf6 25.Rh2 Ke7 26.Qa6 Rc7 27.Qa3+ d6 28.
Kb1 Ng4 29.Rh1 Bxg2 30.Re1+ N6e5 31.Qc1 f3 32.Qg5+ Kd7 33.Rd1 f2 34.Qf5+ 
Kc6 35.Qh5 f1=Q 36.Rxf1 Bxf1 37.Qh1+ Kc5 38.Qxf1 Kb5 39.Qd1 Kc6 40.Qh1+ 
Kd7 41.Qa8 Ke7 42.Kc1 Ke6 43.Kd2 Re7 44.Qc8+ Kd5 45.a4 Nf6 46.Ke3 Nc6+ 47.
Kf3 Kc5 48.Qa6 d5 49.Qc8 Ne4 50.Qh8 Ne5+ 51.Kg2 Nxc3 52.Qf6 Re6 53.Qd8 a5 
54.Kg3 Nxa4 55.Kf4 Nc3 56.Kf5 Ne4 57.Qf8+ Kd4 58.c3+ Kxc3 59.Qa3+ Kd4 60.
Qe3+ 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.23"]
[Round "1"]
[White "Vogel, Jaap"]
[Black "Marcus, Joost"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "30"]
[ECO "A36"]

1.c4 c5 2.Nc3 g6 3.g3 Bg7 4.Bg2 Nc6 5.e3 Nh6 6.Nge2 Nf5 7.Rb1 d6 8.a3 a5 
9.b3 h5 10.h4 Bd7 11.Bb2 Rb8 12.O-O Ne5 13.d4 cxd4 14.Nxd4 Nxd4 15.exd4 
Ng4 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.23"]
[Round "1"]
[White "Zuidema, Coenraad"]
[Black "Van Baarle, John"]
[Result "1-0"]
[EventDate "1970.03.23"]
[PlyCount "91"]
[ECO "B84"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Be7 6.Be3 Qc7 7.Be2 d6 8.O-O 
Nf6 9.f4 Bd7 10.Qe1 a6 11.Rd1 b5 12.a3 Rd8 13.Qg3 h5 14.e5 dxe5 15.Nxc6 
exf4 16.Qxg7 Rg8 17.Qxg8+ Nxg8 18.Nxd8 e5 19.Nxf7 Kxf7 20.Nd5 Qxc2 21.
Bxh5+ Kf8 22.Nxf4 exf4 23.Rxf4+ Nf6 24.Rxd7 Qxb2 25.Bd4 Qd2 26.Rf1 Kg8 27.
Rd1 Qg5 28.Rxe7 Nxh5 29.Bf6 Qc5+ 30.Kf1 Qc4+ 31.Ke1 Qc8 32.Bb2 Kf8 33.Re5 
Ng7 34.Rd3 Qc2 35.Rf3+ Kg8 36.Re2 Qb1+ 37.Kf2 Qg6 38.Rg3 Qb6+ 39.Kf1 Qd6 
40.Rxg7+ Kf8 41.Rg3 Qd1+ 42.Kf2 Qd5 43.Rf3+ Kg8 44.Rg3+ Kh7 45.Re7+ Kh6 
46.Bc1+ 1-0

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.24"]
[Round "2"]
[White "De Ruiter, Tom"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "23"]
[ECO "D00"]

1.f4 d5 2.Nf3 g6 3.e3 Bg7 4.d4 Nf6 5.Bd3 O-O 6.Nbd2 c5 7.c3 Qc7 8.Ne5 Nfd7
9.Qf3 Nxe5 10.fxe5 Nc6 11.O-O Be6 12.Qf4 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.24"]
[Round "2"]
[White "Kort, Jacob"]
[Black "Zuidema, Coenraad"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "74"]
[ECO "E32"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.a3 Bxc3+ 6.Qxc3 d6 7.g3 e5 8.Bg2 
exd4 9.Qxd4 Nc6 10.Qc3 d5 11.cxd5 Nxd5 12.Qc5 Nce7 13.Nf3 b6 14.Qc2 c5 15.
O-O Qe8 16.b3 f6 17.e4 Nc7 18.Bb2 Be6 19.b4 Rc8 20.bxc5 Na6 21.Nd4 Rxc5 
22.Qd2 Bc4 23.Rfc1 b5 24.Bh3 Nc6 25.a4 Ne5 26.axb5 Bxb5 27.Rxa6 Rxc1+ 28.
Bxc1 Bxa6 29.f4 Nc4 30.Qc2 Qd8 31.Be6+ Kh8 32.Bd5 Qb6 33.Qc3 Rc8 34.Kg2 
Nd6 35.Nc6 Bb7 36.Bb2 Nxe4 37.Bxe4 Bxc6 0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.24"]
[Round "2"]
[White "Langeweg, Christian"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "30"]
[ECO "B44"]

1.Nf3 c5 2.e4 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5 d6 6.c4 Nf6 7.N1c3 a6 8.Na3 
Be7 9.Be2 O-O 10.O-O Bd7 11.Be3 Rb8 12.Qd2 Qa5 13.Nc2 b5 14.cxb5 axb5 15.
a3 Qa8 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.24"]
[Round "2"]
[White "Marcus, Joost"]
[Black "Van der Weide, Piet"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "48"]
[ECO "B33"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Qb6 5.Nb3 Nf6 6.Bd3 e6 7.O-O Be7 8.Nc3 
d6 9.Be3 Qc7 10.f4 a6 11.Qf3 O-O 12.Rae1 Nb4 13.g4 Nd7 14.g5 Re8 15.Bd4 
Bf8 16.Qh5 e5 17.Nd5 Nxd5 18.exd5 g6 19.Qf3 Re7 20.f5 b5 21.Bc3 b4 22.Bd2 
Bb7 23.c4 bxc3 24.Bxc3 a5 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.24"]
[Round "2"]
[White "Scholl, Eduard"]
[Black "Jongsma, Alexander"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "83"]
[ECO "B33"]

1.e4 c5 2.Nf3 Nf6 3.Nc3 Nc6 4.d4 cxd4 5.Nxd4 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 
b5 9.Nd5 Be7 10.Bxf6 Bxf6 11.c3 Bg5 12.Nc2 O-O 13.a4 bxa4 14.Rxa4 a5 15.
Bc4 Bd7 16.Ra3 Ne7 17.O-O Rc8 18.Qd3 Nxd5 19.Bxd5 Qb6 20.Rfa1 a4 21.Nb4 
Kh8 22.Qa6 Bd8 23.Bb7 Rb8 24.Qxb6 Bxb6 25.Bc6 Be6 26.Rxa4 f5 27.exf5 Bxf5 
28.Ra8 Be6 29.Nd3 Bc4 30.Rxb8 Rxb8 31.Ne1 g5 32.Nf3 h6 33.b4 Kg7 34.Ra8 
Rxa8 35.Bxa8 Ba2 36.Kf1 Kf6 37.Nd2 d5 38.Ke2 e4 39.Bc6 Bc7 40.Bb5 Be5 41.
c4 Bc3 42.cxd5 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.24"]
[Round "2"]
[White "Van Baarle, John"]
[Black "Vogel, Jaap"]
[Result "1-0"]
[EventDate "1970.03.23"]
[PlyCount "65"]
[ECO "D32"]

1.d4 e6 2.c4 d5 3.Nc3 c5 4.e3 Nf6 5.Nf3 Nc6 6.cxd5 exd5 7.Be2 cxd4 8.Nxd4 
a6 9.O-O Bd6 10.Nxc6 bxc6 11.b3 O-O 12.Bb2 Re8 13.Rc1 Qe7 14.Na4 Bb7 15.
Qd4 Qc7 16.g3 Be5 17.Qd2 Ne4 18.Qc2 Rad8 19.Bf3 Ng5 20.Bg2 Bxb2 21.Qxb2 
Bc8 22.Rfd1 Qd6 23.Rd4 Bf5 24.Qc3 Qa3 25.Nc5 Ne6 26.Nxe6 Bxe6 27.Ra4 Qe7 
28.Rxa6 Ra8 29.Rxa8 Rxa8 30.Qxc6 Rxa2 31.Bxd5 Bd7 32.Qc7 h6 33.Rf1 1-0

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.25"]
[Round "3"]
[White "Hartoch, Robert"]
[Black "De Ruiter, Tom"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "37"]
[ECO "A81"]

1.c4 f5 2.Nf3 Nf6 3.g3 d6 4.d4 c6 5.Bg2 Qc7 6.O-O e5 7.Nc3 Na6 8.e3 Be7 9.
Rb1 Be6 10.Nd2 e4 11.b4 Nb8 12.f3 d5 13.c5 h5 14.Ne2 g5 15.f4 h4 16.gxh4 
Rxh4 17.Nb3 Nbd7 18.Bd2 Kf7 19.Be1 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.25"]
[Round "3"]
[White "Jongsma, Alexander"]
[Black "Langeweg, Christian"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "40"]
[ECO "B48"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3 a6 7.f4 Bb4 8.Bd3 
Nf6 9.Qf3 b5 10.O-O Bb7 11.Qg3 Nxd4 12.Bxd4 Bxc3 13.bxc3 Nxe4 14.Qxg7 
O-O-O 15.Qxh8 Rxh8 16.Bxh8 Nxc3 17.f5 e5 18.Rfe1 f6 19.Bf1 Qc5+ 20.Kh1 Qf8
0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.25"]
[Round "3"]
[White "Kerkhoff, Leo"]
[Black "Marcus, Joost"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "94"]
[ECO "B18"]

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.f4 e6 8.h5 Bh7 
9.Nf3 Nf6 10.Bd3 Bxd3 11.Qxd3 Nbd7 12.Bd2 Qc7 13.O-O-O c5 14.Ne5 cxd4 15.
Qxd4 Bc5 16.Qa4 O-O 17.Nxd7 Nxd7 18.Rh3 Bd6 19.Ne2 Nb6 20.Qe4 Rfd8 21.Nd4 
Qc4 22.Kb1 Bc5 23.Bc3 Nd5 24.Rg3 Nxc3+ 25.bxc3 Qd5 26.Qe2 Rd6 27.Rgd3 Ra6 
28.Nb3 Qc6 29.Rd8+ Rxd8 30.Rxd8+ Kh7 31.Qd3+ f5 32.Qg3 g5 33.fxg5 Bd6 34.
g6+ Kg7 35.Qd3 Qc7 36.Qd4+ e5 37.Qd5 Kf6 38.Qg8 Kg5 39.g7 Qxc3 40.Qf7 Qe1+
41.Nc1 Rb6+ 42.Qb3 Ba3 43.g8=Q+ Kh4 44.Qc4+ e4 45.g3+ Kh3 46.g4+ Kh4 47.
Rd1 Qxd1 0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.25"]
[Round "3"]
[White "Van der Weide, Piet"]
[Black "Van Baarle, John"]
[Result "1-0"]
[EventDate "1970.03.23"]
[PlyCount "73"]
[ECO "B54"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 d6 6.Be3 Nge7 7.f4 Nxd4 8.Qxd4
Nc6 9.Qd2 Be7 10.O-O-O a6 11.g4 Qa5 12.Qf2 Qd8 13.Bb6 Qd7 14.h4 Nb8 15.Bc4
Qc6 16.Bb3 Bd7 17.g5 a5 18.Ba4 Qc4 19.Rd4 Qa6 20.Rd2 O-O 21.f5 Bxa4 22.
Nxa4 Nd7 23.Bd4 exf5 24.exf5 Qc6 25.Re1 Qxa4 26.Rxe7 Qxa2 27.b3 Ne5 28.f6 
g6 29.h5 Rac8 30.hxg6 hxg6 31.Qh2 Ng4 32.Qh3 a4 33.Qxg4 axb3 34.Bb2 Rc6 
35.Qe4 d5 36.Qxg6+ fxg6 37.Rg7+ 1-0

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.25"]
[Round "3"]
[White "Vogel, Jaap"]
[Black "Kort, Jacob"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "116"]
[ECO "D31"]

1.c4 e6 2.Nc3 d5 3.d4 c6 4.Nf3 dxc4 5.a4 Bb4 6.g3 b5 7.Bg2 Bb7 8.O-O a6 9.
Ne4 Nf6 10.Nxf6+ gxf6 11.Bh6 Nd7 12.Qc2 Bf8 13.Bxf8 Kxf8 14.Qd2 Kg7 15.Qf4
Nf8 16.e4 Ng6 17.Qe3 Qe7 18.h4 h5 19.b3 cxb3 20.Qxb3 Nf8 21.Rfc1 Nd7 22.e5
fxe5 23.dxe5 c5 24.axb5 Bd5 25.Qa4 Nb6 26.Qc2 axb5 27.Rxa8 Rxa8 28.Ng5 Rh8
29.Qxc5 Qxc5 30.Rxc5 Bc4 31.Rc7 Rf8 32.Rb7 Na4 33.Bf1 Nc5 34.Rc7 Na6 35.
Ra7 Bxf1 36.Kxf1 Nc5 37.Rc7 Na6 38.Ra7 Nc5 39.Rc7 Na6 40.Rb7 Rb8 41.Nxe6+ 
Kg6 42.Rxb8 Nxb8 43.Nd4 b4 44.Ke2 Nd7 45.f4 Nc5 46.Kd1 Ne4 47.f5+ Kg7 48.
Ne2 Nf2+ 49.Kd2 Ng4 50.e6 fxe6 51.fxe6 Kf6 52.Nf4 Ne5 53.Kc2 Nc6 54.Nxh5+ 
Kxe6 55.g4 Kf7 56.Nf4 Nd4+ 57.Kb2 Nf3 58.h5 Kg7 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.25"]
[Round "3"]
[White "Zuidema, Coenraad"]
[Black "Scholl, Eduard"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "67"]
[ECO "C98"]

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 Qc7 12.Nbd2 Nc6 13.dxc5 dxc5 14.Nf1 Be6 15.Ne3 
Rad8 16.Qe2 c4 17.Nf5 Bxf5 18.exf5 Rfe8 19.Ng5 Nb8 20.Be3 Nbd7 21.b4 h6 
22.Ne4 Nxe4 23.Bxe4 Nf6 24.Qf3 Nxe4 25.Qxe4 Rd3 26.a4 Rxc3 27.axb5 axb5 
28.Ra7 Qd8 29.Qxe5 Bxb4 30.Qxb5 Rcxe3 31.Rxe3 Qd1+ 32.Kh2 Bd6+ 33.g3 Rxe3 
34.Ra8+ 0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.26"]
[Round "4"]
[White "De Ruiter, Tom"]
[Black "Marcus, Joost"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "68"]
[ECO "C02"]

1.e4 e6 2.d4 d5 3.e5 c5 4.c3 Qb6 5.Nf3 Bd7 6.Be2 Bb5 7.O-O Bxe2 8.Qxe2 Qa6
9.c4 Qxc4 10.Qxc4 dxc4 11.Na3 Nc6 12.dxc5 Bxc5 13.Nxc4 O-O-O 14.Bd2 Nge7 
15.b4 Nxb4 16.Bxb4 Bxb4 17.Ng5 Rdf8 18.a3 Bc5 19.Ne4 Bd4 20.Rab1 Kb8 21.
Ned6 b6 22.a4 Nc8 23.a5 Nxd6 24.exd6 Rc8 25.Na3 a6 26.Rfd1 e5 27.axb6 Rhd8
28.Rd2 Rxd6 29.b7 Rc7 30.Kf1 Rb6 31.Rbd1 Rcxb7 32.f4 Rf6 33.g3 g5 34.Kg2 
gxf4 0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.26"]
[Round "4"]
[White "Hartoch, Robert"]
[Black "Jongsma, Alexander"]
[Result "1-0"]
[EventDate "1970.03.23"]
[PlyCount "53"]
[ECO "B04"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.c4 Nb6 6.exd6 cxd6 7.Nc3 Bg4 8.a4 Bg7
9.a5 N6d7 10.Be2 O-O 11.h3 Bxf3 12.Bxf3 Qc8 13.O-O a6 14.Bg5 Re8 15.Re1 
Nc6 16.Bxc6 Qxc6 17.Bxe7 Qxc4 18.Bxd6 Bxd4 19.Rxe8+ Rxe8 20.Ra4 Bxf2+ 21.
Kxf2 Qe6 22.Kg1 Qe3+ 23.Kh2 Nf6 24.Qf3 Qe6 25.Bg3 h5 26.Rd4 Nh7 27.Qd5 1-0

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.26"]
[Round "4"]
[White "Kort, Jacob"]
[Black "Van der Weide, Piet"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "85"]
[ECO "A80"]

1.d4 f5 2.Nc3 c5 3.dxc5 Na6 4.e4 fxe4 5.Nxe4 Nf6 6.Nxf6+ exf6 7.Be3 Qc7 8.
Bxa6 bxa6 9.Qd4 Bb7 10.f3 Rc8 11.Nh3 Bxc5 12.Qxc5 Qxc5 13.Bxc5 Rxc5 14.
O-O-O Bc6 15.Rhe1+ Kf7 16.Nf2 Rc8 17.c3 Ra5 18.a3 Rb8 19.Ne4 h5 20.b4 Re5 
21.Nd6+ Kg6 22.Rxe5 fxe5 23.Nc4 Kf5 24.Na5 Ke6 25.Nxc6 dxc6 26.Kc2 a5 27.
bxa5 Rb5 28.c4 Rxa5 29.Kb3 c5 30.Rd8 Kf5 31.Rf8+ Kg5 32.Rf7 Kg6 33.Rb7 Ra6
34.Rb5 Rc6 35.a4 h4 36.a5 Kf5 37.Rb7 h3 38.gxh3 Kf4 39.Rxa7 Kxf3 40.Rf7+ 
Ke3 41.Rxg7 Re6 42.Rg1 Kd3 43.Ka4 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.26"]
[Round "4"]
[White "Langeweg, Christian"]
[Black "Zuidema, Coenraad"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "36"]
[ECO "E05"]

1.Nf3 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.O-O O-O 6.d4 dxc4 7.Qc2 a6 8.a4 Nc6 
9.Rd1 Nb4 10.Qxc4 b5 11.Qb3 Bb7 12.Nc3 bxa4 13.Rxa4 a5 14.Ne5 Bxg2 15.Kxg2
Qb8 16.Nc4 Ra6 17.f3 Qa8 18.Ra1 Rb8 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.26"]
[Round "4"]
[White "Scholl, Eduard"]
[Black "Vogel, Jaap"]
[Result "1-0"]
[EventDate "1970.03.23"]
[PlyCount "80"]
[ECO "C16"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 b6 5.a3 Bf8 6.Nf3 Ne7 7.Ne2 Ba6 8.Nf4 Bxf1 
9.Kxf1 Ng6 10.Nh5 c5 11.c3 Qc8 12.h4 Qa6+ 13.Kg1 Nd7 14.Rh3 Ne7 15.g4 Nc6 
16.Qd2 Na5 17.Qf4 h6 18.Nd2 g6 19.Nf6+ Nxf6 20.Qxf6 Rh7 21.Qf3 cxd4 22.
cxd4 Rc8 23.Qd1 Be7 24.h5 gxh5 25.gxh5 Qb5 26.Rg3 Qc6 27.Qg4 Qc2 28.Nf1 
Kd7 29.Ne3 Qe4 30.Qxe4 dxe4 31.Ng4 Rc2 32.Bxh6 Bh4 33.Rh3 Be7 34.Bf8 Rxb2 
35.h6 Rb3 36.Rh5 Rf3 37.Bxe7 Kxe7 38.Rc1 Kd8 39.Nf6 Rh8 40.h7 Rf5 1-0

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.26"]
[Round "4"]
[White "Van Baarle, John"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "42"]
[ECO "E97"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 d6 5.e4 O-O 6.Be2 e5 7.O-O Nc6 8.Be3 Ng4 
9.Bg5 f6 10.Bh4 g5 11.Bg3 Nh6 12.dxe5 dxe5 13.Qb3 g4 14.Rad1 Bd7 15.c5+ 
Kh8 16.Nh4 Qc8 17.Nd5 Be6 18.Qe3 Nd4 19.f4 c6 20.Nc3 Qd8 21.Kh1 Qe7 
1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.27"]
[Round "5"]
[White "Jongsma, Alexander"]
[Black "De Ruiter, Tom"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "76"]
[ECO "B30"]

1.e4 e6 2.d3 c5 3.Nf3 Nc6 4.Nbd2 d6 5.c3 Nf6 6.g3 Be7 7.Bg2 O-O 8.O-O Qc7 
9.Re1 Rb8 10.Qe2 b5 11.d4 e5 12.d5 Nd8 13.Nf1 Ne8 14.b4 Bd7 15.Be3 c4 16.
N3d2 Rc8 17.f4 exf4 18.gxf4 Bf6 19.Rac1 a5 20.a3 g6 21.Qf2 axb4 22.axb4 
Bg7 23.Bd4 Ra8 24.Nf3 f6 25.Ra1 Ra4 26.Ne3 Nf7 27.Rxa4 bxa4 28.Bf1 f5 29.
exf5 gxf5 30.Bxg7 Nxg7 31.Nxc4 Nh8 32.Qd4 Ng6 33.Ne3 Re8 34.Bd3 a3 35.Ra1 
Nxf4 36.Rxa3 Re4 37.Ra8+ Be8 38.Qxg7+ Qxg7+ 0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.27"]
[Round "5"]
[White "Kerkhoff, Leo"]
[Black "Kort, Jacob"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "94"]
[ECO "C44"]

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.c3 dxc3 5.Nxc3 d6 6.Bc4 Be6 7.Bxe6 fxe6 8.
Qb3 Qc8 9.Ng5 Nd8 10.f4 Be7 11.f5 Bxg5 12.Bxg5 Nf7 13.fxe6 Nxg5 14.Qb5+ c6
15.Qxg5 g6 16.O-O Qxe6 17.e5 d5 18.Ne2 Qe7 19.Qe3 Qb4 20.Rf4 Qb6 21.Nd4 
O-O-O 22.Raf1 Kb8 23.e6 Ne7 24.Qe5+ Kc8 25.Kh1 Qc7 26.Qf6 Rhe8 27.Nf3 Nf5 
28.Rxf5 gxf5 29.Ng5 Qe7 30.Qxf5 h6 31.Nf7 Qxe6 32.Qxe6+ Rxe6 33.Nxd8 Kxd8 
34.h4 Ke7 35.Rf3 Re4 36.g3 Re1+ 37.Kg2 Re2+ 38.Kh3 Rxb2 39.Kg4 c5 40.Kh5 
Rb6 41.g4 d4 42.g5 hxg5 43.hxg5 c4 44.g6 Rxg6 45.Kxg6 c3 46.Rf4 c2 47.Re4+
Kf8 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.27"]
[Round "5"]
[White "Marcus, Joost"]
[Black "Van Baarle, John"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "82"]
[ECO "A80"]

1.Nf3 f5 2.d4 Nf6 3.Bg5 e6 4.Nbd2 d5 5.c4 Be7 6.g3 O-O 7.Bg2 c6 8.Qc2 Nbd7
9.cxd5 cxd5 10.O-O h6 11.Bf4 g5 12.Bc7 Qe8 13.Ne5 Nxe5 14.Bxe5 Bd7 15.Nf3 
Rc8 16.Qb3 Bb5 17.Rfc1 Qd7 18.Qd1 Rxc1 19.Rxc1 Rc8 20.e3 Ne4 21.Ne1 Kh7 
22.f3 Be2 23.Rxc8 Bxd1 24.Rc7 Qd8 25.fxe4 dxe4 26.Bf1 Kg6 27.Bc4 Bf6 28.
Rc5 Be7 29.Rc7 Bf6 30.Rc5 Bxe5 31.Rxe5 Qe7 32.b3 Kg7 33.Rc5 Qd6 34.Ng2 Bf3
35.Ne1 b6 36.Rb5 a6 37.Re5 Qb4 38.Nxf3 exf3 39.Rxe6 Qe1+ 40.Bf1 f4 41.gxf4
gxf4 0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.27"]
[Round "5"]
[White "Van der Weide, Piet"]
[Black "Scholl, Eduard"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "33"]
[ECO "B48"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Qc7 6.Be3 a6 7.Bd3 Nf6 8.O-O 
b5 9.Nxc6 Qxc6 10.a3 Bb7 11.Qf3 h5 12.Bd4 Ng4 13.Qg3 Qd6 14.Qxd6 Bxd6 15.
h3 Bh2+ 16.Kh1 Be5 17.Bxe5 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.27"]
[Round "5"]
[White "Vogel, Jaap"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "144"]
[ECO "D02"]

1.d4 Nf6 2.Nf3 e6 3.Bf4 b6 4.Nbd2 Bb7 5.e3 Be7 6.Bd3 d5 7.Ne5 a6 8.Qf3 
Nbd7 9.g4 Nxe5 10.Bxe5 Bd6 11.Qg3 Bxe5 12.Qxe5 Qd6 13.Qg5 h6 14.Qh4 O-O-O 
15.f4 Rdg8 16.g5 hxg5 17.Qxg5 c5 18.c3 Rh3 19.Qg1 c4 20.Bf1 Rh6 21.h4 Rg6 
22.Qf2 Rh8 23.Be2 Rgh6 24.b4 Qe7 25.O-O-O Ne8 26.Nf3 Nd6 27.Rdg1 g6 28.Bd1
Bc6 29.Bc2 Qe8 30.Rh2 Ba4 31.Rgh1 Bxc2 32.Qxc2 Rh5 33.Kb2 Kb7 34.Ka1 Qe7 
35.Qf2 Qf6 36.Qc2 Qf5 37.Kb2 Qf6 38.Qa4 Nb5 39.Qc2 Qe7 40.a3 Nd6 41.a4 Kc7
42.Qg2 Qe8 43.Ra1 Nf5 44.Qf2 Qe7 45.Rah1 Nd6 46.Qc2 Qf6 47.Ng5 Kd7 48.Kc1 
Ke8 49.Kb2 Qf5 50.Qe2 Ke7 51.Nf3 Qe4 52.Ng5 Qd3 53.Qxd3 cxd3 54.Nf3 Ne4 
55.Rd1 d2 56.Nxd2 Nxd2 57.Rdxd2 Rxh4 58.Rxh4 Rxh4 59.b5 axb5 60.axb5 Rh3 
61.Kb3 Rxe3 62.Ra2 Rf3 63.Ra7+ Ke8 64.Ra8+ Kd7 65.Ra7+ Ke8 66.Ra8+ Ke7 67.
Ra7+ Kf6 68.Rb7 Rxf4 69.Rxb6 Ke7 70.Kb4 g5 71.Kc5 Rf3 72.Rb7+ Kd8 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.27"]
[Round "5"]
[White "Zuidema, Coenraad"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "30"]
[ECO "B47"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Be2 Qc7 7.f4 b5 8.Nxc6 
Qxc6 9.Bf3 Bb7 10.e5 Qc7 11.Ne4 Nh6 12.Be3 Nf5 13.Bf2 Be7 14.O-O O-O 15.
Qe2 d5 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.28"]
[Round "6"]
[White "De Ruiter, Tom"]
[Black "Van Baarle, John"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "58"]
[ECO "A45"]

1.f4 Nf6 2.Nf3 g6 3.e3 Bg7 4.d4 O-O 5.Bd3 d6 6.O-O Nbd7 7.Nc3 e5 8.Qe1 c6 
9.Bd2 Re8 10.Qh4 Qe7 11.fxe5 dxe5 12.Bc4 h6 13.Qg3 e4 14.Nh4 Kh7 15.Ne2 
Nf8 16.Bb3 Be6 17.c4 Qd7 18.Qf2 g5 19.Nf5 Ng4 20.Nxg7 Nxf2 21.Nxe8 Nh3+ 
22.gxh3 Rxe8 23.Bc3 Ng6 24.Ng3 Bxh3 25.c5 f5 26.Nh5 Rf8 27.d5 f4 28.Nf6+ 
Rxf6 29.Bxf6 Qg4+ 0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.28"]
[Round "6"]
[White "Hartoch, Robert"]
[Black "Vogel, Jaap"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "80"]
[ECO "E64"]

1.c4 g6 2.d4 Nf6 3.g3 c5 4.d5 d6 5.Nc3 Bg7 6.Bg2 O-O 7.Nf3 Na6 8.O-O Nc7 
9.a4 Rb8 10.e4 b6 11.e5 Nd7 12.exd6 exd6 13.Bg5 f6 14.Bf4 Ne5 15.Nxe5 fxe5
16.Be3 Bf5 17.Qd2 Qd7 18.f3 Qe7 19.g4 Bd7 20.Ne4 Ne8 21.h3 Nf6 22.Nc3 Ne8 
23.Rae1 a5 24.Kh1 Bf6 25.Re2 Bg7 26.b3 Nf6 27.Qe1 Rbe8 28.Bd2 Qd8 29.Qg3 
h6 30.Rfe1 g5 31.Bf1 Rf7 32.Re3 h5 33.Bd3 h4 34.Qg2 Ref8 35.Bg6 Re7 36.
R3e2 Bh6 37.Nd1 Rg7 38.Bb1 Bc8 39.Ne3 Kh8 40.Bf5 Ng8 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.28"]
[Round "6"]
[White "Jongsma, Alexander"]
[Black "Zuidema, Coenraad"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "82"]
[ECO "C26"]

1.Nc3 Nf6 2.e4 e5 3.g3 Bc5 4.Bg2 d6 5.d3 Nc6 6.h3 Be6 7.Nge2 h6 8.Nd5 Bxd5
9.exd5 Ne7 10.Nc3 Nf5 11.Na4 Qd7 12.c3 O-O 13.b4 Bb6 14.O-O Rfe8 15.Kh2 
Ne7 16.Rb1 Rad8 17.Nxb6 axb6 18.Qb3 Ra8 19.Bd2 Qa4 20.Rb2 Qxb3 21.axb3 Ra3
22.b5 Nexd5 23.c4 Ne7 24.Bxb7 Nf5 25.Bb4 Ra7 26.Bc6 Re7 27.Re1 Nd7 28.Be4 
Nd4 29.Bc3 Nc5 30.b4 Nxe4 31.Rxe4 f5 32.Re3 Kf7 33.Kg2 Ra3 34.Be1 g5 35.
Rd2 f4 36.gxf4 gxf4 37.Re4 Re6 38.h4 Rg6+ 39.Kh3 Rg1 40.Rd1 Nf3 41.Re2 Ra8
0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.28"]
[Round "6"]
[White "Kort, Jacob"]
[Black "Marcus, Joost"]
[Result "1-0"]
[EventDate "1970.03.23"]
[PlyCount "67"]
[ECO "E60"]

1.g3 g6 2.Bg2 Bg7 3.Nf3 c5 4.d4 cxd4 5.Nxd4 Nc6 6.Nb3 Nf6 7.O-O O-O 8.c4 
b6 9.Nc3 Ba6 10.c5 Rc8 11.h3 Bc4 12.Be3 bxc5 13.Nxc5 d6 14.Qa4 dxc5 15.
Qxc4 Nd4 16.Rac1 Nd7 17.Rfd1 Qa5 18.a3 Nb6 19.Qa2 Rfd8 20.Rd2 e5 21.Rcd1 
c4 22.Kh2 Na4 23.Nxa4 Qxa4 24.Bg5 Re8 25.Bd5 Nxe2 26.b3 Nc3 27.bxa4 Nxa2 
28.Rxa2 e4 29.Rc2 c3 30.Ba2 Re5 31.Rxc3 Rce8 32.Be3 R5e7 33.Rc2 h5 34.h4 
1-0

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.28"]
[Round "6"]
[White "Langeweg, Christian"]
[Black "Van der Weide, Piet"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "44"]
[ECO "A87"]

1.Nf3 f5 2.d4 Nf6 3.g3 d6 4.Bg2 g6 5.b3 Bg7 6.Bb2 O-O 7.O-O c6 8.Nbd2 Na6 
9.Ne1 Qc7 10.Nd3 Bd7 11.c4 Rae8 12.Rc1 e5 13.c5 e4 14.cxd6 Qxd6 15.Nc4 Qc7
16.Nde5 Nd5 17.Qd2 Bc8 18.a3 Qe7 19.b4 Rd8 20.Qc2 Nac7 21.Na5 Qg5 22.Rcd1 
Ne7 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.28"]
[Round "6"]
[White "Scholl, Eduard"]
[Black "Kerkhoff, Leo"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "84"]
[ECO "C72"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.O-O Bg4 6.h3 h5 7.d4 b5 8.Bb3 Nxd4 
9.hxg4 hxg4 10.Ng5 Nh6 11.f4 d5 12.Bxd5 Bc5 13.Be3 Qd6 14.b4 Bb6 15.Nxf7 
Nxf7 16.Bxf7+ Kf8 17.fxe5 Nf3+ 18.Kf2 Bxe3+ 19.Kxe3 Qb6+ 20.Ke2 Rh2 21.Qd5
Rxg2+ 22.Kd3 Ke7 23.Rxf3 Rd8 24.Qxd8+ Kxd8 25.Re3 c5 26.bxc5 Qxc5 27.Nd2 
Qxe5 28.Nb3 Qc7 29.Bd5 Rxc2 30.Kd4 Qb6+ 31.Kd3 Rc3+ 32.Kxc3 Qxe3+ 33.Kb4 
g3 34.Rf1 g2 35.Rf8+ Ke7 36.Rf7+ Ke8 37.Rxg7 Qe1+ 38.Ka3 g1=Q 39.Rxg1 Qxg1
40.Kb4 Kd8 41.Bb7 Kc7 42.Bxa6 Kb6 0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.30"]
[Round "7"]
[White "Kerkhoff, Leo"]
[Black "Langeweg, Christian"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "80"]
[ECO "B49"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Be3 Qc7 7.Be2 b5 8.O-O 
Bb7 9.Nxc6 Bxc6 10.Qd4 b4 11.Nb1 e5 12.Qb6 Qxb6 13.Bxb6 Bxe4 14.Nd2 Bc6 
15.Nc4 f6 16.f4 e4 17.f5 Be7 18.Bh5+ Kf8 19.Rfe1 Nh6 20.Na5 Rc8 21.Nxc6 
Rxc6 22.Bf2 d5 23.Rad1 Rd6 24.Bg3 Rd8 25.Bc7 Rd7 26.Bb6 Nxf5 27.Rxe4 g6 
28.Bg4 Rb7 29.Rxe7 Nxe7 30.Bc5 Kf7 31.Bxe7 Rxe7 32.Rxd5 f5 33.Bf3 Rc8 34.
Ra5 Rxc2 35.h4 Rxb2 36.Rxa6 Kg7 37.Ra5 Rd7 38.h5 Rd3 39.hxg6 hxg6 40.Ra4 
Ra3 0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.30"]
[Round "7"]
[White "Marcus, Joost"]
[Black "Scholl, Eduard"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "78"]
[ECO "A25"]

1.c4 e5 2.g3 g6 3.Nc3 Bg7 4.Bg2 d6 5.e3 Nh6 6.Nge2 O-O 7.O-O Nc6 8.d3 Be6 
9.Nd5 Qd7 10.Rb1 Bh3 11.b4 Nd8 12.b5 c6 13.bxc6 bxc6 14.Nb4 a5 15.Nc2 d5 
16.Ba3 Re8 17.Nc3 Bxg2 18.Kxg2 Ne6 19.e4 Ng5 20.f3 d4 21.Na4 Rab8 22.Kg1 
f5 23.Nc5 Qa7 24.h4 Ngf7 25.Na4 Bf8 26.Bxf8 Rxf8 27.Kg2 Qe7 28.Qd2 fxe4 
29.fxe4 Rxb1 30.Rxb1 Ng4 31.Rf1 Nd8 32.Rxf8+ Qxf8 33.Qe2 h5 34.Qf1 Qh6 35.
Qe1 Ne6 36.Qd1 Qe3 37.Nxe3 Nxe3+ 38.Kf3 Nxd1 39.Nb6 Nc5 0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.30"]
[Round "7"]
[White "Van Baarle, John"]
[Black "Kort, Jacob"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "71"]
[ECO "D31"]

1.c4 e6 2.d4 d5 3.Nc3 c6 4.cxd5 exd5 5.Nf3 Bf5 6.Bf4 Qb6 7.Qd2 Nf6 8.a3 
Be7 9.e3 O-O 10.Be2 Re8 11.O-O Nbd7 12.Ne5 Nxe5 13.Bxe5 Qd8 14.f3 Bd6 15.
Bxf6 Qxf6 16.e4 Qh4 17.e5 Bc7 18.f4 f6 19.g3 Qh6 20.g4 Bd7 21.g5 Qh4 22.
Rf3 h6 23.Kh1 hxg5 24.Rg1 Bb6 25.exf6 g4 26.Rfg3 Rxe2 27.Qxe2 Qxf6 28.f5 
Bxf5 29.Re3 Rf8 30.Re8 Bxd4 31.Rxf8+ Qxf8 32.Rf1 Bb6 33.Kg2 g6 34.Qe5 Qg7 
35.Rxf5 gxf5 36.Qe8+ 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.30"]
[Round "7"]
[White "Van der Weide, Piet"]
[Black "Hartoch, Robert"]
[Result "1-0"]
[EventDate "1970.03.23"]
[PlyCount "107"]
[ECO "B48"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3 a6 7.Bd3 b5 8.Nxc6 
Qxc6 9.O-O Bb7 10.a3 Nf6 11.Qe2 Be7 12.Rae1 O-O 13.Bd4 Rad8 14.Kh1 d5 15.
e5 Nd7 16.Qg4 Bc5 17.Ne2 Rfe8 18.f4 g6 19.Rf3 Bf8 20.b4 Nb6 21.Ba1 Bg7 22.
Nd4 Qc7 23.h4 Nc4 24.Re2 Bc8 25.Qg3 h5 26.Qg5 Bf8 27.f5 exf5 28.e6 Be7 29.
Qh6 Bf8 30.Nxf5 Bxh6 31.Nxh6+ Kf8 32.Rxf7+ Qxf7 33.Nxf7 Rd6 34.Nxd6 Nxd6 
35.Bxg6 Rxe6 36.Rxe6 Bxe6 37.Bxh5 Bf5 38.Bf3 Be4 39.Bd4 Nc4 40.Bxe4 dxe4 
41.g4 Nxa3 42.c3 Kf7 43.Kg2 Nc2 44.Bb6 Ne1+ 45.Kg3 Nd3 46.h5 Kf6 47.Bd4+ 
Kg5 48.Be3+ Kf6 49.g5+ Kf7 50.Bd4 e3 51.Bxe3 Ne5 52.Kf4 Nc4 53.Bd4 Kg8 54.
g6 1-0

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.30"]
[Round "7"]
[White "Vogel, Jaap"]
[Black "Jongsma, Alexander"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "67"]
[ECO "A23"]

1.c4 e5 2.Nc3 Nf6 3.g3 c6 4.d4 exd4 5.Qxd4 d5 6.Bg2 Be6 7.cxd5 cxd5 8.Nf3 
Nc6 9.Qa4 Bc5 10.Qb5 Qb6 11.O-O d4 12.Qxb6 axb6 13.Nb5 Rxa2 14.Rxa2 Bxa2 
15.b4 Bxb4 16.Nfxd4 Nxd4 17.Nxd4 Bd5 18.Nf5 O-O 19.Bb2 Bxg2 20.Kxg2 Rd8 
21.Ra1 Ba5 22.Rc1 Ne8 23.Rc4 g6 24.Nh6+ Kf8 25.Ng4 f5 26.Ne5 Ke7 27.Ba3+ 
Ke6 28.Nf3 h6 29.e4 Nd6 30.exf5+ Nxf5 31.Re4+ Kf7 32.Rc4 Ke6 33.Re4+ Kf7 
34.Rc4 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.30"]
[Round "7"]
[White "Zuidema, Coenraad"]
[Black "De Ruiter, Tom"]
[Result "1-0"]
[EventDate "1970.03.23"]
[PlyCount "61"]
[ECO "C14"]

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Ne4 6.Bxe7 Nxc3 7.Bxd8 Nxd1 8.
Bxc7 Nxb2 9.Rb1 Nc4 10.Bxc4 dxc4 11.Nf3 Na6 12.Bd6 b6 13.Nd2 Bb7 14.Nxc4 
Bxg2 15.Rg1 Be4 16.Ne3 Bg6 17.Rc1 Rc8 18.Kd2 Nb8 19.Bxb8 Rxb8 20.Nc4 Ke7 
21.Nd6 f6 22.f4 Rhf8 23.Ke3 b5 24.h4 Rg8 25.Rg2 Rb6 26.c4 bxc4 27.Rxc4 Kd7
28.h5 Bb1 29.Ra4 a6 30.Nc4 Rc6 31.exf6 1-0

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.31"]
[Round "8"]
[White "De Ruiter, Tom"]
[Black "Kort, Jacob"]
[Result "1-0"]
[EventDate "1970.03.23"]
[PlyCount "49"]
[ECO "C63"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.d4 fxe4 5.Bxc6 bxc6 6.Nxe5 Nf6 7.f3 exf3 8.
Qxf3 Rb8 9.Bg5 Be7 10.Bxf6 Bxf6 11.Qh5+ g6 12.Nxg6 hxg6 13.Qxg6+ Ke7 14.
O-O Bxd4+ 15.Kh1 Rxh2+ 16.Kxh2 Qh8+ 17.Kg3 Qe5+ 18.Rf4 Be3 19.Qf7+ Kd6 20.
Qf8+ Ke6 21.Qe8+ Kd6 22.Qxe5+ Kxe5 23.Rf8 Bc1 24.Na3 Bxb2 25.Nc4+ 1-0

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.31"]
[Round "8"]
[White "Hartoch, Robert"]
[Black "Kerkhoff, Leo"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "64"]
[ECO "E69"]

1.c4 g6 2.d4 Nf6 3.Nf3 Bg7 4.g3 O-O 5.Bg2 d6 6.O-O Nbd7 7.Nc3 c6 8.e4 e5 
9.Rb1 a5 10.h3 exd4 11.Nxd4 Re8 12.Bf4 Ne5 13.b3 Nfd7 14.Be3 Nc5 15.Qc2 
Qe7 16.Rbd1 a4 17.Rfe1 axb3 18.axb3 Na6 19.Na2 Nd7 20.Kh2 Nf6 21.Bf4 Nh5 
22.Bc1 Nc5 23.Nc3 Ne6 24.Nde2 Nc5 25.Nf4 Nxf4 26.Bxf4 Be5 27.Bc1 Qc7 28.b4
Na6 29.Na2 Qb6 30.f4 Bg7 31.Be3 Nxb4 32.Qb1 c5 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.31"]
[Round "8"]
[White "Jongsma, Alexander"]
[Black "Van der Weide, Piet"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "82"]
[ECO "A00"]

1.Nc3 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 d6 5.g3 Nf6 6.Bg2 Bd7 7.O-O g6 8.Nb3 
Bg7 9.Bf4 O-O 10.Qd2 Re8 11.Rad1 Rb8 12.Bh6 Bh8 13.h3 Na5 14.Nxa5 Qxa5 15.
Bg5 Kf8 16.e4 Rec8 17.e5 Qxe5 18.Rfe1 Qf5 19.g4 Qc5 20.Be3 Qc7 21.Bxa7 Ra8
22.Bd4 e5 23.Be3 Ra6 24.g5 Ne8 25.Nd5 Qb8 26.Nb6 Rd8 27.Bf1 Rxa2 28.Bc4 
Rxb2 29.Qc3 Rxb6 30.Bxb6 Rc8 31.Qb3 Rxc4 32.Qxc4 Bc6 33.Re3 Qc8 34.Qh4 Kg8
35.Red3 Qe6 36.Qg4 d5 37.Qxe6 fxe6 38.c4 d4 39.f3 Nd6 40.Rc1 h6 41.gxh6 
Bf6 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.31"]
[Round "8"]
[White "Langeweg, Christian"]
[Black "Marcus, Joost"]
[Result "1-0"]
[EventDate "1970.03.23"]
[PlyCount "81"]
[ECO "D55"]

1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Nc3 Be7 5.Bg5 O-O 6.e3 h6 7.Bxf6 Bxf6 8.Qd2 
Nc6 9.cxd5 exd5 10.g3 b6 11.Bg2 Ba6 12.Ne2 Re8 13.Rd1 Na5 14.O-O c5 15.
Rfe1 Bxe2 16.Qxe2 c4 17.Nd2 Qd7 18.Nb1 Nc6 19.Nc3 Ne7 20.e4 g6 21.e5 Bg7 
22.b4 b5 23.f4 a5 24.Rb1 axb4 25.Rxb4 Nc6 26.Qb2 Nxb4 27.Qxb4 Bf8 28.Qb1 
Qa7 29.Rd1 Red8 30.Bxd5 b4 31.Nb5 Qxa2 32.Qxg6+ Bg7 33.Qxf7+ Kh8 34.Bxc4 
Qc2 35.Bb3 Qe2 36.Nd6 Qe3+ 37.Kg2 Qe2+ 38.Kh3 Ra2 39.Bxa2 Qxd1 40.Nf5 Qf1+
41.Kh4 1-0

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.31"]
[Round "8"]
[White "Scholl, Eduard"]
[Black "Van Baarle, John"]
[Result "1-0"]
[EventDate "1970.03.23"]
[PlyCount "77"]
[ECO "B54"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 d6 6.Be2 Nxd4 7.Qxd4 Ne7 8.Bg5
Nc6 9.Qd2 Qa5 10.O-O a6 11.Rfd1 b5 12.a3 Bb7 13.b4 Qb6 14.a4 bxa4 15.b5 
axb5 16.Bxb5 a3 17.Ba4 h6 18.Rdb1 Qc7 19.Bh4 Be7 20.Nb5 Qd7 21.Bxe7 Kxe7 
22.Nxd6 Rhd8 23.Qf4 e5 24.Qxf7+ Kxd6 25.Rd1+ Kc7 26.Rxd7+ Rxd7 27.Qb3 Rd4 
28.Qf7+ Rd7 29.Qb3 Rd4 30.Bxc6 Bxc6 31.c4 Rd2 32.f3 a2 33.Qc3 Rd7 34.Qb2 
Rd4 35.Rxa2 Rb8 36.Ra7+ Kc8 37.Qa3 Rd7 38.Qf8+ Rd8 39.Qc5 1-0

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.03.31"]
[Round "8"]
[White "Zuidema, Coenraad"]
[Black "Vogel, Jaap"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "58"]
[ECO "C16"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 b6 5.Qg4 Bf8 6.Nh3 Qd7 7.Nf4 Nc6 8.Be3 Bb7 
9.Bb5 g6 10.Qe2 h5 11.f3 a6 12.Bd3 Nge7 13.g4 Bh6 14.Ng2 hxg4 15.fxg4 Nxd4
16.Bxd4 c5 17.Bf2 c4 18.Bxb6 cxd3 19.cxd3 d4 20.Ne4 Bxe4 21.Qxe4 Rb8 22.
Bxd4 Rb4 23.Qa8+ Qd8 24.Qxd8+ Kxd8 25.Bc3 Rxg4 26.Kf2 Nd5 27.h3 Rg5 28.Bd4
Bg7 29.Rad1 Rhh5 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.01"]
[Round "9"]
[White "Kerkhoff, Leo"]
[Black "Jongsma, Alexander"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "37"]
[ECO "A05"]

1.e4 c5 2.Nf3 Nf6 3.d3 Nc6 4.Nbd2 g6 5.g3 Bg7 6.Bg2 O-O 7.O-O d6 8.c3 Rb8 
9.a4 a6 10.h3 Qc7 11.Nh4 b5 12.f4 b4 13.c4 Nd4 14.Ndf3 Nd7 15.g4 b3 16.
Nxd4 cxd4 17.Qf3 a5 18.f5 Nc5 19.g5 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.01"]
[Round "9"]
[White "Kort, Jacob"]
[Black "Scholl, Eduard"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "112"]
[ECO "D80"]

1.d4 Nf6 2.c4 g6 3.f3 d5 4.Nc3 Bg7 5.e4 dxe4 6.fxe4 O-O 7.Be2 Nc6 8.Nf3 
Bg4 9.d5 Nb8 10.Bg5 Nbd7 11.Qd2 c6 12.h3 Bxf3 13.gxf3 cxd5 14.cxd5 Rc8 15.
Rc1 Ne5 16.b3 Qa5 17.Kf2 h6 18.Be3 Nfd7 19.Nb5 Qxd2 20.Bxd2 a6 21.Nc7 g5 
22.h4 Ng6 23.d6 Bd4+ 24.Be3 Bxe3+ 25.Kxe3 exd6 26.Nd5 Kg7 27.Rcg1 Nf6 28.
hxg5 Nxd5+ 29.exd5 Rfe8+ 30.Kd2 hxg5 31.Rxg5 Kf6 32.Rg4 Rc5 33.Rd4 Re5 34.
Bc4 b5 35.Bd3 Rcxd5 36.Rxd5 Rxd5 37.Kc3 Ne5 38.Be4 Rc5+ 39.Kb4 Nc6+ 40.
Bxc6 Rxc6 41.Ka5 Ke5 42.a4 bxa4 43.bxa4 d5 44.Kb4 d4 45.Re1+ Kf4 46.Re4+ 
Kxf3 47.Rxd4 f5 48.Rd7 f4 49.a5 Ke4 50.Rb7 f3 51.Rf7 Ke3 52.Re7+ Kd2 53.
Rd7+ Ke2 54.Re7+ Kf1 55.Rf7 f2 56.Rd7 Re6 0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.01"]
[Round "9"]
[White "Marcus, Joost"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "69"]
[ECO "A65"]

1.d4 Nf6 2.c4 c5 3.d5 d6 4.Nc3 g6 5.e4 Bg7 6.Bd3 O-O 7.Nge2 e6 8.O-O exd5 
9.cxd5 b6 10.Bg5 Ba6 11.f4 h6 12.Bh4 Qe8 13.h3 Bxd3 14.Qxd3 Nbd7 15.Rad1 
a6 16.a4 Qb8 17.e5 dxe5 18.f5 g5 19.Bg3 Nh5 20.d6 Nf4 21.Qf3 Nf6 22.h4 Ra7
23.hxg5 hxg5 24.Nxf4 exf4 25.Bxf4 gxf4 26.Qxf4 Qd8 27.Rd3 Nh7 28.Nd5 f6 
29.Qc4 Rff7 30.Re1 Qxd6 31.Re6 Qd8 32.Nxb6 Qb8 33.Rde3 Bf8 34.a5 Kh8 35.
Re8 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.01"]
[Round "9"]
[White "Van Baarle, John"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "88"]
[ECO "E16"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ 6.Bd2 Be7 7.O-O O-O 8.Nc3 d5
9.cxd5 Nxd5 10.Ne5 Nxc3 11.bxc3 Bxg2 12.Kxg2 c5 13.Bf4 f6 14.Nf3 Qd5 15.e4
Qxe4 16.Re1 Qd5 17.Qe2 cxd4 18.Qxe6+ Qxe6 19.Rxe6 Ba3 20.cxd4 Na6 21.Rd1 
Rfd8 22.d5 Rd7 23.h4 Bf8 24.d6 Rc8 25.Nd4 Rc5 26.Re8 Kf7 27.Rde1 Rd5 28.
Nc6 Bxd6 29.Bxd6 R5xd6 30.R1e7+ Rxe7 31.Rxe7+ Kf8 32.Rxa7 Nc5 33.Nb4 Rd2 
34.Kf3 f5 35.Ke3 Rb2 36.a3 Ne4 37.Ra8+ Kf7 38.Nd3 Rb3 39.Kd4 Nd6 40.Ne5+ 
Ke6 41.Nd3 Rxa3 42.Nf4+ Kd7 43.Rxa3 Nb5+ 44.Kd5 Nxa3 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.01"]
[Round "9"]
[White "Van der Weide, Piet"]
[Black "Zuidema, Coenraad"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "86"]
[ECO "C28"]

1.e4 e5 2.Nc3 Nf6 3.Bc4 Nc6 4.d3 Bc5 5.Be3 Bb6 6.Nge2 d6 7.Qd2 Be6 8.Bb3 
d5 9.exd5 Nxd5 10.Nxd5 Bxd5 11.O-O O-O 12.Bxd5 Qxd5 13.Nc3 Qd7 14.Bxb6 
axb6 15.Rae1 Rfe8 16.a3 Nd4 17.Re4 f5 18.Ree1 Rad8 19.f3 c5 20.Rf2 Qc6 21.
Qe3 b5 22.Nb1 Ne6 23.Ref1 Nf4 24.Nc3 b4 25.axb4 cxb4 26.Ne2 Nd5 27.Qd2 Qb6
28.Ng3 Ne3 29.Re1 f4 30.Ne4 Qd4 31.Qc1 Rc8 32.Kh1 Rc6 33.Qb1 Ra8 34.c3 Qa7
35.d4 exd4 36.cxd4 Qxd4 37.Rd2 Qe5 38.Rc1 b3 39.Rc3 Rca6 40.Qe1 Nc2 41.
Rcxc2 bxc2 42.Rxc2 Ra1 43.Rc1 Qxb2 0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.01"]
[Round "9"]
[White "Vogel, Jaap"]
[Black "De Ruiter, Tom"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "26"]
[ECO "A85"]

1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 f5 5.Nf3 Nf6 6.Be2 Bd6 7.b3 Nbd7 8.Bb2 Qe7 
9.Qc2 Ne4 10.Nd2 O-O 11.g3 Ndf6 12.f4 Nxd2 13.Qxd2 b6 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.02"]
[Round "10"]
[White "De Ruiter, Tom"]
[Black "Scholl, Eduard"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "78"]
[ECO "C91"]

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.d4 Bg4 10.d5 Na5 11.Bc2 c6 12.dxc6 Qc7 13.Nbd2 Qxc6 14.Nf1 Nc4 15.b3 Nb6
16.Bb2 Rfe8 17.Rc1 h6 18.Ng3 Bf8 19.h3 Be6 20.Bb1 a5 21.Qe2 Reb8 22.Bd3 
Nfd7 23.c4 b4 24.Bb1 Nc5 25.Nd2 a4 26.Rf1 axb3 27.axb3 Nbd7 28.Rfd1 Ra6 
29.Ngf1 Be7 30.Kh2 Bg5 31.Ne3 Nf6 32.Qf3 Qb7 33.Re1 Qc8 34.Rcd1 Nh7 35.Nd5
Bxd5 36.cxd5 Bf4+ 37.g3 Ng5 38.Qg4 Qxg4 39.hxg4 Bxd2 0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.02"]
[Round "10"]
[White "Hartoch, Robert"]
[Black "Van Baarle, John"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "84"]
[ECO "E68"]

1.c4 Nf6 2.Nc3 d6 3.d4 Nbd7 4.Nf3 g6 5.g3 Bg7 6.Bg2 O-O 7.O-O e5 8.e4 c6 
9.Rb1 Re8 10.d5 Nc5 11.Qc2 cxd5 12.cxd5 Nfxe4 13.Nxe4 Nxe4 14.Be3 Bf5 15.
Qe2 Nc5 16.Rbd1 Qd7 17.Nh4 Bh3 18.Bxh3 Qxh3 19.Bxc5 dxc5 20.Qb5 b6 21.d6 
Rad8 22.b4 Qd7 23.Qxd7 Rxd7 24.bxc5 bxc5 25.Rd5 Rc8 26.Rc1 c4 27.Nf3 c3 
28.Nxe5 Bxe5 29.Rxe5 Rxd6 30.Kf1 c2 31.Re2 Rd1+ 32.Re1 Rd4 33.Re2 Rd1+ 34.
Re1 Rd4 35.Re2 Rdc4 36.Ke1 Kg7 37.Kd2 Ra4 38.Ra1 Rxa2 39.Rc1 Ra6 40.Re7 
Rd6+ 41.Ke2 Re6+ 42.Rxe6 fxe6 0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.02"]
[Round "10"]
[White "Jongsma, Alexander"]
[Black "Marcus, Joost"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "64"]
[ECO "C00"]

1.e4 e6 2.d3 d5 3.Nd2 Nc6 4.Ngf3 Nf6 5.c3 e5 6.Be2 a5 7.O-O Bc5 8.Qc2 O-O 
9.b3 Qe7 10.a3 b6 11.Bb2 Bb7 12.b4 Bd6 13.Rfe1 Rad8 14.Bf1 dxe4 15.dxe4 
Bc8 16.Rad1 h6 17.Bc1 Nh7 18.h3 Ng5 19.Nxg5 Qxg5 20.Nc4 Qg6 21.Kh1 axb4 
22.axb4 f5 23.f3 f4 24.b5 Ne7 25.Nxd6 Rxd6 26.Ba3 Rxd1 27.Rxd1 Re8 28.Bc4+
Kh7 29.Qa2 Qg3 30.Bf7 Rd8 31.Rxd8 Qe1+ 32.Kh2 Qg3+ 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.02"]
[Round "10"]
[White "Langeweg, Christian"]
[Black "Kort, Jacob"]
[Result "1-0"]
[EventDate "1970.03.23"]
[PlyCount "77"]
[ECO "D30"]

1.d4 d5 2.c4 e6 3.Nf3 c6 4.Qc2 Nf6 5.g3 b6 6.Bg2 Bb7 7.O-O Nbd7 8.b3 Rc8 
9.Nbd2 c5 10.Bb2 Rc7 11.Rac1 a6 12.Qb1 cxd4 13.Bxd4 Ba3 14.Rcd1 b5 15.cxd5
Bxd5 16.e4 Ba8 17.e5 Nd5 18.Ne4 O-O 19.Neg5 g6 20.Ne4 Qe7 21.h4 Rfc8 22.
Nfd2 Rc6 23.Ba1 Qf8 24.Nd6 Bxd6 25.exd6 Rxd6 26.Ne4 Rdc6 27.Qb2 f6 28.Bh3 
Kf7 29.Rfe1 h6 30.h5 f5 31.hxg6+ Kxg6 32.Nd2 Rc2 33.Qd4 e5 34.Qd3 e4 35.
Nxe4 Nf4 36.gxf4 Bxe4 37.Rxe4 Nc5 38.Qg3+ Kh7 39.Re7+ 1-0

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.02"]
[Round "10"]
[White "Vogel, Jaap"]
[Black "Van der Weide, Piet"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "37"]
[ECO "A21"]

1.c4 f5 2.Nc3 Nf6 3.g3 g6 4.Bg2 Bg7 5.e3 O-O 6.Nge2 c6 7.O-O Kh8 8.d3 e5 
9.e4 d6 10.Kh1 Be6 11.Bg5 Nbd7 12.Qd2 Qe7 13.b3 Rf7 14.d4 fxe4 15.Nxe4 
Nxe4 16.Bxe4 Qf8 17.Be3 Nf6 18.Bg2 Ng4 19.f4 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.02"]
[Round "10"]
[White "Zuidema, Coenraad"]
[Black "Kerkhoff, Leo"]
[Result "1-0"]
[EventDate "1970.03.23"]
[PlyCount "59"]
[ECO "C26"]

1.e4 e5 2.Nc3 Nf6 3.g3 Bc5 4.Bg2 Nc6 5.Nge2 d6 6.O-O Bg4 7.h3 Be6 8.Nd5 
Qd7 9.Kh2 h5 10.c3 h4 11.g4 Bxd5 12.exd5 Ne7 13.d4 Bb6 14.c4 Ng6 15.Bg5 
Nxg4+ 16.hxg4 Qxg4 17.Be3 h3 18.Bh1 exd4 19.Nxd4 Ne5 20.Qxg4 Nxg4+ 21.Kg3 
Nxe3 22.fxe3 Bxd4 23.exd4 f6 24.Be4 Kf7 25.Bf5 Rh5 26.Be6+ Kg6 27.Rh1 Rg5+
28.Kf3 f5 29.Rxh3 Kf6 30.Rah1 1-0

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.04"]
[Round "11"]
[White "Kerkhoff, Leo"]
[Black "Vogel, Jaap"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "80"]
[ECO "C00"]

1.e4 e6 2.d3 d5 3.Nd2 Nf6 4.Ngf3 Bc5 5.e5 Nfd7 6.g3 Be7 7.Bg2 c5 8.O-O Nc6
9.Re1 Qc7 10.Qe2 b6 11.c3 Bb7 12.Nf1 h6 13.h4 O-O-O 14.a3 Na5 15.Bf4 c4 
16.d4 Kb8 17.Ne3 Rdg8 18.Nf5 Bf8 19.Nd6 Bxd6 20.exd6 Qd8 21.h5 Ka8 22.Rab1
Rf8 23.Nd2 Nf6 24.b3 cxb3 25.c4 dxc4 26.Bxb7+ Kxb7 27.Nxc4 Nxc4 28.Qxc4 
Nd5 29.Rec1 Qd7 30.Qxb3 Rc8 31.Qf3 Rxc1+ 32.Rxc1 Rc8 33.Rc7+ Rxc7 34.dxc7 
Kc8 35.Qd3 Nxc7 36.Qh7 f6 37.Bxh6 gxh6 38.Qxh6 Qxd4 39.Qh8+ Kb7 40.h6 Qd1+
1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.04"]
[Round "11"]
[White "Kort, Jacob"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "27"]
[ECO "B46"]

1.Nf3 c5 2.e4 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 a6 6.g3 Nge7 7.Nb3 d6 8.Bg2 
Ng6 9.f4 Be7 10.Be3 O-O 11.Qd2 Qc7 12.Rd1 b5 13.a3 Bb7 14.h4 1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.04"]
[Round "11"]
[White "Marcus, Joost"]
[Black "Zuidema, Coenraad"]
[Result "0-1"]
[EventDate "1970.03.23"]
[PlyCount "122"]
[ECO "D55"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Bg5 Be7 5.Nc3 O-O 6.e3 h6 7.Bxf6 Bxf6 8.Rc1 c6
9.Bd3 Nd7 10.O-O dxc4 11.Bxc4 e5 12.Ne4 exd4 13.Nxf6+ Nxf6 14.Qxd4 Bg4 15.
Qf4 Qe7 16.h3 Bxf3 17.Qxf3 Rad8 18.Rfd1 c5 19.Qf5 b6 20.a3 Rd6 21.Be2 Rfd8
22.Rxd6 Rxd6 23.Qc2 Qe5 24.b4 cxb4 25.axb4 Rd8 26.Qc7 Qxc7 27.Rxc7 Rd7 28.
Rc8+ Kh7 29.Kf1 Nd5 30.b5 Kg6 31.Bd3+ Kf6 32.Ke2 Ke7 33.Kf3 Nf6 34.Bc4 Ne8
35.Ra8 Rc7 36.Bd5 Nf6 37.Bc6 Kd6 38.e4 Re7 39.Rc8 Kc5 40.h4 Kb4 41.g4 Nd7 
42.Kf4 Ne5 43.Rg8 a5 44.Rxg7 Nxc6 45.bxc6 a4 46.Rg8 a3 47.Ra8 Rc7 48.g5 
hxg5+ 49.Kxg5 Rxc6 50.e5 Rc5 51.Kf6 Ra5 52.Rd8 a2 53.Rd1 a1=Q 54.Rxa1 Rxa1
55.Kxf7 Kc5 56.h5 Ra7+ 57.Kg6 b5 58.h6 b4 59.h7 Ra8 60.e6 b3 61.e7 b2 0-1

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.04"]
[Round "11"]
[White "Scholl, Eduard"]
[Black "Langeweg, Christian"]
[Result "1-0"]
[EventDate "1970.03.23"]
[PlyCount "61"]
[ECO "B48"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Be3 Qc7 7.Bd3 Nf6 8.O-O 
b5 9.Nxc6 Qxc6 10.a3 Bb7 11.Qe2 Be7 12.f4 O-O 13.e5 Ne8 14.f5 exf5 15.Bxf5
d5 16.Rad1 Rd8 17.Bd4 Nc7 18.Rf3 g6 19.e6 Rd6 20.Qe5 f6 21.Qg3 Qe8 22.Re1 
Rc6 23.Qh4 gxf5 24.Rg3+ Kh8 25.Qh6 Rf7 26.exf7 Qxf7 27.Rge3 Bf8 28.Qh4 a5 
29.Ne2 b4 30.Nf4 Nb5 31.Re7 1-0

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.04"]
[Round "11"]
[White "Van Baarle, John"]
[Black "Jongsma, Alexander"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "28"]
[ECO "E50"]

1.d4 Nf6 2.c4 Nc6 3.Nf3 e6 4.Nc3 Bb4 5.e3 O-O 6.Bd3 Qe7 7.Bd2 d5 8.cxd5 
exd5 9.h3 a6 10.O-O h6 11.Rc1 Be6 12.Na4 Ne4 13.Bxb4 Nxb4 14.Bb1 Bf5 
1/2-1/2

[Event "26th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1970.04.04"]
[Round "11"]
[White "Van der Weide, Piet"]
[Black "De Ruiter, Tom"]
[Result "1/2-1/2"]
[EventDate "1970.03.23"]
[PlyCount "21"]
[ECO "A04"]

1.e4 c5 2.Nf3 Nc6 3.d3 g6 4.g3 Bg7 5.Bg2 d6 6.O-O Bg4 7.h3 Bd7 8.c3 Qc8 9.
Kh2 h5 10.d4 Nh6 11.Re1 1/2-1/2
