[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.16"]
[Round "1"]
[White "Enklaar, Bertus"]
[Black "Boersma, Paulus"]
[Result "1/2-1/2"]
[WhiteElo "2410"]
[BlackElo "2300"]
[EventDate "1973.04.16"]
[PlyCount "93"]
[ECO "A42"]

1.e4 d6 2.d4 g6 3.c4 Bg7 4.Nc3 Nc6 5.d5 Nd4 6.Be3 c5 7.Nge2 Qb6 8.Qd2 Bg4 
9.Na4 Qb4 10.Qxb4 Nc2+ 11.Kd2 Nxb4 12.Nac3 Bd7 13.h3 h5 14.g3 Na6 15.a3 
Nh6 16.Nf4 O-O 17.Bd3 Nc7 18.b4 b6 19.Rab1 e5 20.dxe6 Nxe6 21.Nfd5 Rfe8 
22.e5 Nf5 23.Ne4 Red8 24.Nef6+ Kf8 25.Bxf5 gxf5 26.exd6 Bc6 27.bxc5 f4 28.
gxf4 Bxf6 29.Nxf6 Nxc5 30.Nd5 Rxd6 31.Bxc5 bxc5 32.Kc3 Bxd5 33.cxd5 Rxd5 
34.Rhe1 Rd4 35.Re5 Rxf4 36.Rxh5 Rf3+ 37.Kc4 Rf4+ 38.Kxc5 Rc8+ 39.Kd5 Rc3 
40.Rb8+ Kg7 41.Rg5+ Kf6 42.Rg3 Rff3 43.a4 Rxg3 44.fxg3 Rxg3 45.Rb7 Rxh3 
46.Rxa7 Ra3 47.Ke4 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.16"]
[Round "1"]
[White "Hartoch, Robert"]
[Black "Scholl, Eduard"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[BlackElo "2400"]
[EventDate "1973.04.16"]
[PlyCount "30"]
[ECO "A29"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.g3 Bb4 5.Bg2 O-O 6.O-O e4 7.Ng5 Bxc3 8.bxc3 
Re8 9.f3 exf3 10.Nxf3 Qe7 11.e3 d6 12.Nd4 Nxd4 13.cxd4 c6 14.Qb3 Bg4 15.
Ba3 Qd7 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.16"]
[Round "1"]
[White "Henneberke, Franciscus"]
[Black "Van der Weide, Piet"]
[Result "1/2-1/2"]
[BlackElo "2310"]
[EventDate "1973.04.16"]
[PlyCount "41"]
[ECO "A88"]

1.d4 f5 2.c4 Nf6 3.Nc3 d6 4.Nf3 g6 5.g3 Bg7 6.Bg2 O-O 7.O-O c6 8.Bg5 Na6 
9.Qd2 Qb6 10.Rad1 Re8 11.b3 Qb4 12.Ne1 Qa5 13.Bxf6 exf6 14.Nd3 Qd8 15.Rfe1
Nc7 16.Nf4 Bh6 17.e3 Qe7 18.Qc1 Qf7 19.Qa3 Bf8 20.Qb2 Bd7 21.Nd3 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.16"]
[Round "1"]
[White "Sosonko, Gennadi"]
[Black "Van Scheltinga, Theodore"]
[Result "1-0"]
[BlackElo "2360"]
[EventDate "1973.04.16"]
[PlyCount "61"]
[ECO "A94"]

1.d4 d5 2.c4 e6 3.g3 c6 4.Qc2 Nf6 5.Nf3 Nbd7 6.Bg2 Ne4 7.O-O Be7 8.b3 O-O 
9.Ba3 Bxa3 10.Nxa3 Qe7 11.Qb2 f5 12.b4 a6 13.c5 g5 14.Rad1 h5 15.Nc2 h4 
16.Ne5 Nxe5 17.dxe5 Qh7 18.Ne3 hxg3 19.fxg3 Kg7 20.Bxe4 dxe4 21.Rf2 f4 22.
gxf4 gxf4 23.Rg2+ Kh8 24.Ng4 f3 25.Nf6 Qh6 26.exf3 exf3 27.Rg3 b5 28.Qd2 
f2+ 29.Kxf2 Qxh2+ 30.Kf3 Qh5+ 31.Kg2 1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.16"]
[Round "1"]
[White "Van Baarle, John"]
[Black "Van der Vliet, Fredrik"]
[Result "0-1"]
[WhiteElo "2320"]
[BlackElo "2300"]
[EventDate "1973.04.16"]
[PlyCount "80"]
[ECO "A02"]

1.f4 c5 2.b3 Nf6 3.Bb2 e6 4.Nf3 Be7 5.e3 O-O 6.Bd3 Nc6 7.O-O b6 8.c4 d5 9.
Ne5 Bb7 10.cxd5 exd5 11.Bb5 Rc8 12.d3 Na5 13.Bc3 a6 14.Bxa5 axb5 15.Be1 
Nd7 16.Nd2 Bd6 17.Bg3 Re8 18.Ndf3 f6 19.Nxd7 Qxd7 20.Qd2 Bf8 21.a3 Qe6 22.
Bf2 d4 23.exd4 Bxf3 24.gxf3 Qxb3 25.dxc5 bxc5 26.Qa2 Qxa2 27.Rxa2 Red8 28.
Rd1 Ra8 29.Rdd2 Ra4 30.Be3 Kf7 31.Kf2 Rd5 32.Rab2 b4 33.axb4 cxb4 34.Ke2 
Rh5 35.Kf1 Bd6 36.Rdc2 Ra3 37.Rd2 b3 38.d4 Rb5 39.Rd3 Ra1+ 40.Ke2 Ra2 0-1

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.16"]
[Round "1"]
[White "Zuidema, Coenraad"]
[Black "Marcus, Joost"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[EventDate "1973.04.16"]
[PlyCount "33"]
[ECO "A03"]

1.b3 d5 2.Bb2 c5 3.e3 Nf6 4.f4 g6 5.Nf3 Bg7 6.Be2 O-O 7.O-O b6 8.Ne5 Bb7 
9.Bf3 Nc6 10.Nxc6 Bxc6 11.Qe2 Qd7 12.d3 Ne8 13.Bxg7 Nxg7 14.c4 Rad8 15.Nc3
e6 16.g4 d4 17.Bxc6 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.17"]
[Round "2"]
[White "Boersma, Paulus"]
[Black "Van Baarle, John"]
[Result "1-0"]
[WhiteElo "2300"]
[BlackElo "2320"]
[EventDate "1973.04.16"]
[PlyCount "74"]
[ECO "B25"]

1.g3 g6 2.Bg2 Bg7 3.e4 c5 4.d3 Nc6 5.Ne2 d6 6.O-O e6 7.Nbc3 Nge7 8.Bg5 Rb8
9.Qd2 h6 10.Be3 b5 11.a3 Nd4 12.Rab1 a5 13.b4 Nxe2+ 14.Nxe2 axb4 15.axb4 
Qc7 16.c3 e5 17.d4 exd4 18.cxd4 c4 19.Nc3 Bd7 20.Ra1 h5 21.Ra5 O-O 22.Rfa1
Kh7 23.d5 Nc8 24.Bf1 Nb6 25.Ra7 Rb7 26.Rxb7 Qxb7 27.Ra5 Rb8 28.Nxb5 Na4 
29.Bxc4 Nb6 30.Be2 Nc8 31.Kg2 Ra8 32.Rxa8 Qxa8 33.Nd4 f5 34.exf5 Qxd5+ 35.
Bf3 Qc4 36.fxg6+ Kxg6 37.Qe2 d5 1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.17"]
[Round "2"]
[White "Hartoch, Robert"]
[Black "Sosonko, Gennadi"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[EventDate "1973.04.16"]
[PlyCount "90"]
[ECO "B39"]

1.c4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.e4 Bg7 6.Be3 Nf6 7.Nc3 Ng4 8.Qxg4 
Nxd4 9.Qd1 Ne6 10.Rc1 Qa5 11.Qd2 b6 12.b3 Bb7 13.Nd5 Qxd2+ 14.Kxd2 Be5 15.
f3 g5 16.h4 h6 17.hxg5 hxg5 18.Rxh8+ Bxh8 19.Bd3 Be5 20.Rh1 d6 21.Bc2 Rc8 
22.Rh5 Kd7 23.Rh7 Rf8 24.Bd3 Nf4 25.Bf1 Ne6 26.Ke1 Bg3+ 27.Kd1 Be5 28.Bd2 
Bc6 29.Ne3 Bf4 30.Bd3 Nd4 31.Nf5 Nxf5 32.exf5 Bxd2 33.Kxd2 f6 34.Be4 Bxe4 
35.fxe4 a6 36.Kc3 Rc8 37.Rh3 b5 38.Kd4 b4 39.Rh1 a5 40.Ra1 Rh8 41.a3 e5+ 
42.fxe6+ Kxe6 43.axb4 axb4 44.Ra4 Rh2 45.Rxb4 Rxg2 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.17"]
[Round "2"]
[White "Marcus, Joost"]
[Black "Enklaar, Bertus"]
[Result "1/2-1/2"]
[BlackElo "2410"]
[EventDate "1973.04.16"]
[PlyCount "81"]
[ECO "D32"]

1.Nf3 Nf6 2.c4 e6 3.d4 c5 4.e3 d5 5.Nc3 Nc6 6.a3 a6 7.cxd5 exd5 8.Be2 Bd6 
9.dxc5 Bxc5 10.b4 Ba7 11.Bb2 O-O 12.O-O Be6 13.b5 axb5 14.Nxb5 Bb8 15.Rc1 
Ne4 16.Qd3 Qe7 17.Rfd1 Rd8 18.Nbd4 Ne5 19.Nxe5 Bxe5 20.g3 Bd7 21.Bf3 Nc5 
22.Qc2 Na4 23.Ba1 Qxa3 24.Bxd5 Bg4 25.Bf3 Rac8 26.Bxg4 Rxc2 27.Nxc2 Rxd1+ 
28.Rxd1 Qe7 29.Bxe5 f5 30.Bxg7 fxg4 31.Ba1 Nc5 32.Rd5 Ne6 33.Nd4 Qa3 34.
Nxe6 Qxa1+ 35.Kg2 Qa4 36.Nd4 Kf7 37.Rb5 Ke8 38.Re5+ Kf8 39.Rf5+ Ke8 40.
Re5+ Kf7 41.Rb5 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.17"]
[Round "2"]
[White "Scholl, Eduard"]
[Black "Van der Weide, Piet"]
[Result "1/2-1/2"]
[WhiteElo "2400"]
[BlackElo "2310"]
[EventDate "1973.04.16"]
[PlyCount "75"]
[ECO "B42"]

1.e4 c5 2.Nf3 e6 3.Nc3 a6 4.d4 cxd4 5.Nxd4 d6 6.Bd3 Nf6 7.O-O Nbd7 8.Kh1 
b5 9.Qe2 Bb7 10.Bd2 Be7 11.a4 bxa4 12.Nxa4 O-O 13.Nb3 Qc7 14.Na5 Bc8 15.f4
e5 16.f5 d5 17.exd5 e4 18.Bxe4 Bd6 19.Bf3 Qxc2 20.Qd1 Qxf5 21.Nc4 Be5 22.
Bb4 Re8 23.Bd6 Qf4 24.Nxe5 Nxe5 25.Nb6 Ra7 26.Qc1 Qxc1 27.Raxc1 Bf5 28.
Bxe5 Rxe5 29.d6 h6 30.Rfd1 Rb5 31.Nc8 Bxc8 32.Rxc8+ Kh7 33.h3 a5 34.Bc6 
Rc5 35.Bb7 Rb5 36.Bc6 Rc5 37.Bb7 Rb5 38.Bc6 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.17"]
[Round "2"]
[White "Van Scheltinga, Theodore"]
[Black "Zuidema, Coenraad"]
[Result "1/2-1/2"]
[WhiteElo "2360"]
[BlackElo "2430"]
[EventDate "1973.04.16"]
[PlyCount "45"]
[ECO "C50"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3 Bc5 5.Nc3 d6 6.Bg5 h6 7.Bxf6 Qxf6 8.Nd5 
Qd8 9.c3 a6 10.d4 Ba7 11.h3 Be6 12.Bb3 O-O 13.O-O Re8 14.Re1 Na5 15.Bc2 c6
16.Ne3 Nc4 17.Nxc4 Bxc4 18.Bb3 Bxb3 19.Qxb3 Qb6 20.Qxb6 Bxb6 21.dxe5 dxe5 
22.Rad1 Re7 23.Re2 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.17"]
[Round "2"]
[White "Van der Vliet, Fredrik"]
[Black "Henneberke, Franciscus"]
[Result "1/2-1/2"]
[WhiteElo "2300"]
[EventDate "1973.04.16"]
[PlyCount "58"]
[ECO "D79"]

1.Nf3 Nf6 2.g3 d5 3.Bg2 g6 4.O-O Bg7 5.d4 O-O 6.c4 c6 7.cxd5 cxd5 8.Nc3 
Ne4 9.Ne5 Nxc3 10.bxc3 Nc6 11.Nxc6 bxc6 12.Qa4 Qb6 13.e4 Ba6 14.Re1 Bb5 
15.Qb4 e6 16.Bf4 Bd3 17.Qa3 Rfc8 18.Bd6 Qb7 19.e5 a5 20.Bf1 Bxf1 21.Rxf1 
Bf8 22.Bxf8 Rxf8 23.Rab1 Qa7 24.Rb2 Rfb8 25.Rfb1 Rxb2 26.Rxb2 Rb8 27.Qc5 
Qc7 28.Rb3 Rxb3 29.axb3 Qb7 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.18"]
[Round "3"]
[White "Enklaar, Bertus"]
[Black "Van Scheltinga, Theodore"]
[Result "0-1"]
[WhiteElo "2410"]
[BlackElo "2360"]
[EventDate "1973.04.16"]
[PlyCount "100"]
[ECO "B69"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O-O-O 
Bd7 9.f4 Be7 10.Nf3 b5 11.Bxf6 gxf6 12.f5 Qa5 13.Kb1 Rc8 14.Bd3 Nb4 15.Nd4
Nxd3 16.Qxd3 b4 17.Nce2 e5 18.Nb3 Qb6 19.Ng3 a5 20.Nh5 Rg8 21.Rhg1 a4 22.
Nc1 Qf2 23.Qe2 Qxe2 24.Nxe2 d5 25.Rxd5 Bc6 26.Rd2 Bxe4 27.Nhg3 Bb7 28.Nc1 
Rg5 29.Nd3 h5 30.Nf1 e4 31.h4 exd3 32.hxg5 dxc2+ 33.Kc1 b3 34.axb3 axb3 
35.Ne3 Ra8 36.Nxc2 bxc2 37.Kxc2 Be4+ 38.Kc3 Rc8+ 39.Kb3 Bxf5 40.gxf6 Bxf6 
41.Rh1 Be6+ 42.Kb4 Rb8+ 43.Kc5 h4 44.Rf2 Ke7 45.Rb1 Rb3 46.Rd2 Be5 47.Re2 
f6 48.Rd2 Kf7 49.Kc6 Kg6 50.Rdd1 Bg4 0-1

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.18"]
[Round "3"]
[White "Henneberke, Franciscus"]
[Black "Boersma, Paulus"]
[Result "0-1"]
[BlackElo "2300"]
[EventDate "1973.04.16"]
[PlyCount "80"]
[ECO "E61"]

1.d4 Nf6 2.c4 c5 3.e3 g6 4.Nf3 Bg7 5.Nc3 O-O 6.Be2 cxd4 7.exd4 d5 8.c5 Bg4
9.O-O Nc6 10.Be3 b6 11.cxb6 Qxb6 12.Qd2 Bxf3 13.Bxf3 e6 14.Rab1 Ne8 15.Na4
Qb4 16.Qxb4 Nxb4 17.Nc3 Nd6 18.Rfd1 Rfc8 19.a3 Nc6 20.Be2 Ne7 21.Nb5 Nc4 
22.Bxc4 Rxc4 23.Rbc1 Rb8 24.Rxc4 dxc4 25.Nd6 Rxb2 26.Nxc4 Rc2 27.Rc1 Rxc1+
28.Bxc1 Bxd4 29.Kf1 Nd5 30.Ke2 Kf8 31.f3 Ke7 32.Kd3 Bg1 33.h3 f6 34.Nb2 
Kd6 35.Kc4 Kc6 36.Nd3 a5 37.a4 Be3 38.Bb2 Bd2 39.Ba3 Ne3+ 40.Kd4 Nc2+ 0-1

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.18"]
[Round "3"]
[White "Sosonko, Gennadi"]
[Black "Scholl, Eduard"]
[Result "1-0"]
[BlackElo "2400"]
[EventDate "1973.04.16"]
[PlyCount "79"]
[ECO "D97"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 a6 8.Be2 b5
9.Qb3 c5 10.dxc5 Bb7 11.O-O Nbd7 12.e5 Nxc5 13.Qb4 Nfd7 14.Rd1 Rc8 15.Be3 
Qe8 16.Nd5 Bxd5 17.Rxd5 Na4 18.Rad1 Ndb6 19.R5d2 Nc4 20.Bxc4 Rxc4 21.Qa5 
Rc8 22.Qxa6 Ra8 23.Qb7 Rb8 24.Qe4 Qc8 25.Rc2 Qb7 26.Qxb7 Rxb7 27.b3 Nb6 
28.Rc5 Nd7 29.Rcd5 Nb8 30.a4 bxa4 31.bxa4 e6 32.Rd6 f6 33.a5 fxe5 34.a6 
Nxa6 35.Rxa6 e4 36.Ng5 Rfb8 37.Rxe6 Rb1 38.Rd6 Be5 39.Rd8+ Kg7 40.Rd7+ 1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.18"]
[Round "3"]
[White "Van Baarle, John"]
[Black "Marcus, Joost"]
[Result "1-0"]
[WhiteElo "2320"]
[EventDate "1973.04.16"]
[PlyCount "113"]
[ECO "B52"]

1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Qxd7 5.c4 e5 6.d3 Nc6 7.Nc3 g6 8.O-O 
Bg7 9.Nd5 Nge7 10.Bg5 O-O 11.Bxe7 Nxe7 12.Nxe7+ Qxe7 13.Nd2 Rab8 14.a4 a6 
15.Qb3 Qd7 16.Rfd1 h5 17.Qc2 Bh6 18.Nb1 Kg7 19.Nc3 Bg5 20.Nd5 b5 21.axb5 
axb5 22.Nc3 bxc4 23.dxc4 Ra8 24.Nb5 Be7 25.Qd3 Qc6 26.Ra3 Rxa3 27.bxa3 Ra8
28.f3 Ra4 29.Qb3 Qa6 30.Qc3 Kg8 31.Rc1 Qa5 32.Qxa5 Rxa5 33.Kf2 Kf8 34.Ke2 
Ke8 35.Kd3 Kd7 36.Kc3 Ra8 37.Ra1 Bd8 38.Rd1 Bc7 39.Kb3 Ra6 40.a4 Bd8 41.
Rd3 Ba5 42.f4 exf4 43.e5 Bc7 44.Rd5 h4 45.h3 Bb8 46.exd6 Bxd6 47.a5 Ke6 
48.Ka4 f5 49.Nxd6 Rxd6 50.Kb5 g5 51.a6 g4 52.a7 Rxd5 53.cxd5+ Kxd5 54.
a8=Q+ Kd4 55.Qh8+ Ke3 56.Qxh4 f3 57.Qe1+ 1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.18"]
[Round "3"]
[White "Van der Weide, Piet"]
[Black "Van der Vliet, Fredrik"]
[Result "0-1"]
[WhiteElo "2310"]
[BlackElo "2300"]
[EventDate "1973.04.16"]
[PlyCount "120"]
[ECO "B57"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 Qb6 7.Nb3 e6 8.O-O 
a6 9.Be3 Qc7 10.Bd3 b5 11.f4 Be7 12.Qf3 Bb7 13.h3 O-O 14.g4 Nd7 15.Qf2 Nb4
16.Rad1 Rac8 17.Nd4 Rfe8 18.Nf3 Nxd3 19.cxd3 b4 20.Ne2 Bf8 21.Ng3 g6 22.h4
Bg7 23.h5 Nf6 24.Nh2 gxh5 25.g5 Ng4 26.Nxg4 hxg4 27.f5 d5 28.Nh5 exf5 29.
Nxg7 Kxg7 30.Bd4+ Kg8 31.exf5 Qe7 32.Qf4 Rc2 33.g6 Qc7 34.gxf7+ Kxf7 35.
Qxc7+ Rxc7 36.Rf4 h5 37.f6 Bc8 38.Rff1 Rc2 39.Rc1 Ree2 40.Rxc2 Rxc2 41.Re1
Be6 42.Re5 h4 43.Rg5 h3 44.Be5 Rg2+ 45.Kh1 Ke8 46.Bd4 Rg3 47.Bc5 Rf3 48.
Kh2 Rxf6 49.Rg7 Rh6 50.Bxb4 Kd8 51.Bc5 Kc8 52.b4 Bd7 53.Rg8+ Kc7 54.a4 Re6
55.Ba7 Re2+ 56.Kh1 d4 57.b5 axb5 58.axb5 Bxb5 59.Rg7+ Kc8 60.Rh7 g3 0-1

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.18"]
[Round "3"]
[White "Zuidema, Coenraad"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[BlackElo "2430"]
[EventDate "1973.04.16"]
[PlyCount "61"]
[ECO "B80"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.g3 d6 7.Bg2 Bd7 8.O-O Nf6
9.Re1 Be7 10.Nxc6 Bxc6 11.a4 O-O 12.a5 Nd7 13.Be3 Qc7 14.Na4 Rad8 15.Nb6 
Rfe8 16.Qd2 Nf6 17.Qc3 Qb8 18.Bf4 Nh5 19.Be3 Nf6 20.Bf4 Nh5 21.Bd2 Nf6 22.
Rad1 h6 23.Bf4 Nh5 24.Bc1 Nf6 25.Bf4 Nh5 26.Bc1 Nf6 27.b3 Nd7 28.Nxd7 Rxd7
29.Ba3 Red8 30.Qe3 Qc7 31.Bb4 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.19"]
[Round "4"]
[White "Boersma, Paulus"]
[Black "Van der Weide, Piet"]
[Result "1/2-1/2"]
[WhiteElo "2300"]
[BlackElo "2310"]
[EventDate "1973.04.16"]
[PlyCount "83"]
[ECO "A81"]

1.Nf3 f5 2.g3 Nf6 3.Bg2 g6 4.b3 Bg7 5.Bb2 O-O 6.O-O d6 7.d4 c6 8.Nbd2 Na6 
9.Ne1 e5 10.dxe5 Nd7 11.Nd3 Nxe5 12.Nxe5 Bxe5 13.Bxe5 dxe5 14.Nc4 Qf6 15.
Qd6 Qxd6 16.Nxd6 Rb8 17.Nc4 e4 18.Rfd1 Be6 19.Na5 Kf7 20.c3 Rfc8 21.b4 b6 
22.Nb3 c5 23.e3 cxb4 24.Bf1 Nc5 25.cxb4 Nd7 26.Ba6 Rd8 27.Nd4 Ne5 28.Kg2 
Bc8 29.Be2 a6 30.Rac1 Rd7 31.Nc6 Nxc6 32.Rxc6 Rxd1 33.Bxd1 Be6 34.Bb3 Bxb3
35.axb3 Rb7 36.h3 Ke7 37.g4 Kd7 38.Rc2 Kd6 39.Kg3 Rf7 40.Ra2 Kc6 41.Rxa6 
Kb5 42.Ra4 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.19"]
[Round "4"]
[White "Hartoch, Robert"]
[Black "Enklaar, Bertus"]
[Result "0-1"]
[WhiteElo "2430"]
[BlackElo "2410"]
[EventDate "1973.04.16"]
[PlyCount "80"]
[ECO "B20"]

1.g3 g6 2.Bg2 Bg7 3.e4 c5 4.Ne2 Nc6 5.O-O d6 6.d3 Rb8 7.a4 a6 8.c3 e5 9.
Be3 Nf6 10.h3 O-O 11.d4 Qe7 12.d5 Nd8 13.b4 cxb4 14.cxb4 Nh5 15.Nec3 f5 
16.exf5 Bxf5 17.Ra3 Rc8 18.Re1 Qd7 19.Kh2 Nf7 20.Qd2 Nf6 21.f3 h5 22.Rb3 
Kh7 23.Na3 g5 24.g4 Bg6 25.b5 a5 26.gxh5 Nxh5 27.Ne4 Nf4 28.Bxf4 gxf4 29.
Qxa5 Bf5 30.Rc3 Rxc3 31.Qxc3 Rc8 32.Qb4 Qe7 33.a5 Qh4 34.a6 Ng5 35.Nxg5+ 
Qxg5 36.axb7 Qg3+ 37.Kh1 Bxh3 38.Qe4+ Kh6 39.Bxh3 Qxh3+ 40.Kg1 Rg8 0-1

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.19"]
[Round "4"]
[White "Marcus, Joost"]
[Black "Henneberke, Franciscus"]
[Result "1-0"]
[EventDate "1973.04.16"]
[PlyCount "80"]
[ECO "A34"]

1.Nf3 Nf6 2.c4 d5 3.cxd5 Nxd5 4.Nc3 Nxc3 5.bxc3 g6 6.g3 Bg7 7.Bg2 O-O 8.
O-O c5 9.Qa4 Nd7 10.Rb1 Qc7 11.d4 Nb6 12.Qa5 Nd5 13.Qxc7 Nxc7 14.Ba3 Nd5 
15.Rfc1 cxd4 16.cxd4 Re8 17.Ne5 e6 18.e4 Bxe5 19.dxe5 Nb6 20.Rc7 Bd7 21.
Rxb7 Bc6 22.Rc7 Rec8 23.Bd6 Rxc7 24.Bxc7 Rc8 25.Bd6 Ba8 26.f3 Bc6 27.Rc1 
Bd7 28.Rxc8+ Nxc8 29.Bc5 Kg7 30.Bf1 Nb6 31.Kf2 Bc6 32.Ke3 Bd7 33.Ba6 Bc6 
34.Kd4 f5 35.exf6+ Kxf6 36.Bd6 Nd7 37.f4 Kf7 38.Bc4 Nf6 39.f5 gxf5 40.exf5
Bd7 1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.19"]
[Round "4"]
[White "Scholl, Eduard"]
[Black "Van der Vliet, Fredrik"]
[Result "1/2-1/2"]
[WhiteElo "2400"]
[BlackElo "2300"]
[EventDate "1973.04.16"]
[PlyCount "83"]
[ECO "B31"]

1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.h3 Nf6 6.Nc3 O-O 7.e5 Ne8 8.Bxc6 
dxc6 9.d3 Nc7 10.Re1 Ne6 11.a4 a5 12.Ne2 f5 13.Nf4 Nxf4 14.Bxf4 h6 15.h4 
Be6 16.c4 Kh7 17.Qe2 Qb6 18.Qc2 Rad8 19.g3 Bg8 20.Kg2 e6 21.Rh1 Bf7 22.
Rad1 Rd7 23.Rd2 Rfd8 24.Rhd1 Qc7 25.b3 Qb8 26.Qc3 Qc7 27.Qb2 Bg8 28.Be3 b6
29.Bf4 Bf7 30.Kg1 Kg8 31.Qc1 Kh7 32.Qc3 Kg8 33.Re1 Bf8 34.Qc2 Bg7 35.Qd1 
Kh7 36.Qe2 Be8 37.Qe3 Bf8 38.Kh2 Bf7 39.Red1 Qb7 40.Qe2 Qc7 41.Rg1 Bg7 42.
Rgd1 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.19"]
[Round "4"]
[White "Sosonko, Gennadi"]
[Black "Zuidema, Coenraad"]
[Result "1/2-1/2"]
[BlackElo "2430"]
[EventDate "1973.04.16"]
[PlyCount "43"]
[ECO "E02"]

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+ Nbd7 6.Nf3 a6 7.Nc3 Rb8 8.Qxc4 
b5 9.Qd3 Bb7 10.O-O Be7 11.Bf4 Rc8 12.Ne5 Bxg2 13.Kxg2 Nxe5 14.dxe5 Qxd3 
15.exd3 Nd5 16.Nxd5 exd5 17.d4 Kd7 18.Rad1 Ke6 19.Be3 c5 20.f4 f5 21.exf6 
Kxf6 22.dxc5 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.19"]
[Round "4"]
[White "Van Scheltinga, Theodore"]
[Black "Van Baarle, John"]
[Result "1-0"]
[WhiteElo "2360"]
[BlackElo "2320"]
[EventDate "1973.04.16"]
[PlyCount "89"]
[ECO "B36"]

1.d4 Nf6 2.c4 c5 3.Nf3 cxd4 4.Nxd4 Nc6 5.Nc3 g6 6.e4 Nxd4 7.Qxd4 d6 8.Be3 
Bg7 9.Be2 O-O 10.Qd2 Ng4 11.Bxg4 Bxg4 12.Rc1 Be6 13.Nd5 Bxd5 14.exd5 Qd7 
15.O-O Bf6 16.b3 Rfc8 17.a4 h5 18.Bd4 Qf5 19.Rc3 Bxd4 20.Qxd4 Rc7 21.Re1 
b6 22.h3 Qg5 23.Rce3 Re8 24.h4 Qh6 25.f4 Qg7 26.Qe4 Qf6 27.Rg3 Qxh4 28.Rg5
Kh7 29.Re3 e5 30.Rh3 Qxf4 31.Rgxh5+ Kg7 32.Rh7+ Kf8 33.Rh8+ Ke7 34.Rxe8+ 
Kxe8 35.Rh8+ Kd7 36.Qxf4 exf4 37.Kf2 Ke7 38.Kf3 g5 39.Kg4 f6 40.Kf5 Rd7 
41.Rh6 Kd8 42.Rxf6 Kc7 43.Kxg5 Rg7+ 44.Rg6 Rf7 45.Kg4 1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.20"]
[Round "5"]
[White "Enklaar, Bertus"]
[Black "Sosonko, Gennadi"]
[Result "1/2-1/2"]
[WhiteElo "2410"]
[EventDate "1973.04.16"]
[PlyCount "120"]
[ECO "B64"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Qd2 Be7 8.O-O-O
O-O 9.f4 d5 10.e5 Nd7 11.Bxe7 Qxe7 12.Nf3 Nb6 13.Bd3 Bd7 14.Rdf1 Rac8 15.
g4 Na5 16.f5 Nac4 17.f6 Qc5 18.Qg5 Qe3+ 19.Qxe3 Nxe3 20.Rf2 Rc5 21.Re1 
Nec4 22.fxg7 Kxg7 23.Nd4 Rfc8 24.Nb1 R5c7 25.g5 Be8 26.b3 Na5 27.Re3 Nc6 
28.Nxc6 Bxc6 29.Rf4 Bb5 30.c3 Bxd3 31.Rxd3 Nd7 32.Re3 b5 33.Kb2 Nc5 34.Nd2
a5 35.h4 Nd7 36.Nf3 b4 37.cxb4 Rc2+ 38.Ka3 axb4+ 39.Rxb4 Nc5 40.Rb6 Ra8+ 
41.Kb4 Raxa2 42.Nd4 Rc1 43.Rc6 Na6+ 44.Kb5 Rca1 45.b4 Nxb4 46.Kxb4 Ra4+ 
47.Kc5 Rc4+ 48.Kd6 Rxd4 49.Rf3 Ra7 50.h5 Rc4 51.Rf6 Ra8 52.g6 hxg6 53.hxg6
Rxc6+ 54.Kxc6 fxg6 55.Rxe6 d4 56.Re7+ Kf8 57.Rd7 Ra5 58.e6 d3 59.Kd6 d2 
60.Rf7+ Ke8 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.20"]
[Round "5"]
[White "Henneberke, Franciscus"]
[Black "Van Scheltinga, Theodore"]
[Result "0-1"]
[BlackElo "2360"]
[EventDate "1973.04.16"]
[PlyCount "76"]
[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.h3 Rb8 
9.Be3 Bd7 10.Rc1 Na5 11.Nd2 b5 12.cxb5 axb5 13.b3 Nb7 14.Nde4 Ne8 15.Qd2 
e6 16.f4 d5 17.Nf2 b4 18.Nb1 Bb5 19.Qxb4 Bxe2 20.Rfe1 Nbd6 21.Qd2 Ba6 22.
Nd3 Bxd3 23.Qxd3 f5 24.Nd2 Ne4 25.Nxe4 fxe4 26.Qc3 Nd6 27.g4 h5 28.Qxc7 
Qxc7 29.Rxc7 Nb5 30.Rd7 hxg4 31.hxg4 Bxd4 32.f5 gxf5 33.gxf5 Rxf5 34.Bxd4 
Nxd4 35.Bxe4 Rg5+ 36.Kh1 Rf8 37.Bd3 Rf3 38.Bf1 Rf4 0-1

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.20"]
[Round "5"]
[White "Van Baarle, John"]
[Black "Hartoch, Robert"]
[Result "0-1"]
[WhiteElo "2320"]
[BlackElo "2430"]
[EventDate "1973.04.16"]
[PlyCount "48"]
[ECO "A04"]

1.Nf3 c5 2.e4 e6 3.d3 Nc6 4.Nbd2 d6 5.g3 g6 6.Bg2 Bg7 7.O-O Nge7 8.a4 O-O 
9.Re1 e5 10.Nc4 Rb8 11.c3 h6 12.Bd2 Be6 13.b4 Qd7 14.b5 Nd8 15.Qe2 Kh7 16.
Rad1 f5 17.exf5 gxf5 18.Nh4 Bf6 19.Qh5 Nf7 20.Ne3 d5 21.Bh3 Bxh4 22.Qxh4 
Ng5 23.Bg2 f4 24.Nxd5 Ng6 0-1

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.20"]
[Round "5"]
[White "Van der Vliet, Fredrik"]
[Black "Boersma, Paulus"]
[Result "1/2-1/2"]
[WhiteElo "2300"]
[BlackElo "2300"]
[EventDate "1973.04.16"]
[PlyCount "135"]
[ECO "A53"]

1.Nf3 d6 2.d4 Nf6 3.c4 c6 4.Nc3 Bg4 5.e3 Nbd7 6.Be2 e5 7.dxe5 dxe5 8.O-O 
Qc7 9.Qc2 Be7 10.b3 O-O 11.Bb2 Rfe8 12.Rfe1 Nc5 13.b4 e4 14.bxc5 exf3 15.
gxf3 Bh3 16.Na4 Nd7 17.Kh1 Bf6 18.Bxf6 Nxf6 19.Qc3 Qe7 20.Rg1 g6 21.Rg3 
Be6 22.Rag1 Nh5 23.Rg5 Ng7 24.e4 f6 25.R5g2 Nh5 26.Re1 Nf4 27.Rgg1 Rad8 
28.Qe3 Qc7 29.Nb2 Rd7 30.Rd1 Red8 31.Rd6 Nxe2 32.Qxe2 Rxd6 33.cxd6 Rxd6 
34.Qe3 Qd8 35.e5 fxe5 36.Qxe5 Bf7 37.Qe3 Rd2 38.Na4 Qd4 39.Qxd4 Rxd4 40.
Nc5 Bxc4 41.Nxb7 Bxa2 42.Ra1 Bd5 43.Kg2 Rd3 44.Rxa7 Rxf3 45.Kf1 Rh3 46.Nd6
Kf8 47.Kg1 Rd3 48.f4 h5 49.f5 Bb3 50.Ra8+ Ke7 51.Nc8+ Kf6 52.fxg6 Rd8 53.
Ra3 Bd5 54.Nb6 Be4 55.Kf2 Kxg6 56.Ke3 Re8 57.Kf4 Bh1 58.Rg3+ Kf6 59.Nd7+ 
Ke6 60.Nc5+ Kd6 61.Nb7+ Kc7 62.Nc5 Re2 63.Rh3 Rf2+ 64.Ke3 Rf5 65.Ne6+ Kd6 
66.Nf4 Re5+ 67.Kd2 Re4 68.Nxh5 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.20"]
[Round "5"]
[White "Van der Weide, Piet"]
[Black "Marcus, Joost"]
[Result "1/2-1/2"]
[WhiteElo "2310"]
[EventDate "1973.04.16"]
[PlyCount "90"]
[ECO "B72"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.Be3 Nc6 8.Nb3 
O-O 9.f4 Be6 10.g4 Na5 11.f5 Bc4 12.e5 Nd7 13.f6 exf6 14.exd6 Re8 15.Nxa5 
Qxa5 16.Bxc4 Rxe3+ 17.Kf1 Ne5 18.Be2 f5 19.Nd5 Re4 20.gxf5 Nc6 21.f6 Bf8 
22.b4 Rxb4 23.c3 Rd4 24.Ne7+ Bxe7 25.fxe7 Qf5+ 26.Ke1 Rxd1+ 27.Rxd1 Qe4 
28.Rf1 Nxe7 29.Rd4 Qe5 30.dxe7 Qxe7 31.Kd2 Re8 32.Bc4 Qg5+ 33.Kc2 Rf8 34.
Rdf4 Kg7 35.h4 Qg2+ 36.R1f2 Qc6 37.Bb3 f5 38.Re2 Qd6 39.Rd4 Qf6 40.h5 Qg5 
41.h6+ Qxh6 42.Rd7+ Kf6 43.Rd6+ Kg7 44.Rd7+ Kf6 45.Rd6+ Kg7 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.20"]
[Round "5"]
[White "Zuidema, Coenraad"]
[Black "Scholl, Eduard"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[BlackElo "2400"]
[EventDate "1973.04.16"]
[PlyCount "89"]
[ECO "B93"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 e5 7.Nf3 Nbd7 8.a4 Be7
9.Bc4 O-O 10.Qe2 b6 11.O-O Qc7 12.Kh1 Nc5 13.fxe5 dxe5 14.Bg5 Bb7 15.Bxf6 
Bxf6 16.Bd5 Rac8 17.Bxb7 Qxb7 18.Nd5 Nd7 19.Rad1 Rfe8 20.Ne3 Nc5 21.Nd5 
Nd7 22.Ne1 Re6 23.c3 Bd8 24.Nc2 Nf6 25.Ncb4 a5 26.Nxf6+ Rxf6 27.Rxf6 Bxf6 
28.Nd5 Qc6 29.b3 Rb8 30.h3 h6 31.Qh5 Qe6 32.c4 Be7 33.Qf5 Bc5 34.Qxe6 fxe6
35.Nc7 Kf7 36.Rd7+ Be7 37.Kg1 Kf6 38.Kf2 g6 39.Ke2 Rc8 40.Nb5 Bc5 41.Nc3 
Rf8 42.Rd3 Ke7 43.Rf3 Rd8 44.Nd1 h5 45.Rd3 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.21"]
[Round "6"]
[White "Hartoch, Robert"]
[Black "Henneberke, Franciscus"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[EventDate "1973.04.16"]
[PlyCount "75"]
[ECO "A16"]

1.c4 Nf6 2.Nf3 g6 3.Nc3 d5 4.cxd5 Nxd5 5.g3 Bg7 6.Bg2 Nb6 7.O-O O-O 8.d3 
Nc6 9.Be3 Nd4 10.Rc1 c6 11.Nxd4 Bxd4 12.Bg5 Be6 13.Qd2 Bf6 14.Bh6 Bg7 15.
Ne4 Bd5 16.h4 Bxh6 17.Qxh6 Bxe4 18.Bxe4 Qd4 19.Rc2 f5 20.Bf3 Rad8 21.Qe3 
Qxe3 22.fxe3 Nd5 23.Bxd5+ Rxd5 24.Rc4 Re5 25.Kf2 Rf6 26.Rb4 b6 27.d4 Rd5 
28.Rc1 Kf7 29.Rbc4 Rdd6 30.Ra4 Rd7 31.Rac4 Rdd6 32.a4 Rfe6 33.b4 a6 34.Ra1
Rd5 35.Rac1 Rdd6 36.Ra1 Rd5 37.a5 bxa5 38.Rxa5 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.21"]
[Round "6"]
[White "Marcus, Joost"]
[Black "Van der Vliet, Fredrik"]
[Result "1/2-1/2"]
[BlackElo "2300"]
[EventDate "1973.04.16"]
[PlyCount "83"]
[ECO "E66"]

1.g3 g6 2.Bg2 Bg7 3.c4 d6 4.Nf3 Nf6 5.O-O O-O 6.Nc3 Nc6 7.d4 a6 8.d5 Na5 
9.Nd2 c5 10.Qc2 e5 11.dxe6 fxe6 12.b3 Rb8 13.Bb2 b5 14.cxb5 axb5 15.Rad1 
d5 16.e3 Qe7 17.Nf3 Nc6 18.Ne2 e5 19.Rc1 c4 20.Nd2 Qa7 21.a3 Bg4 22.Nc3 
Bf5 23.e4 Nd4 24.Qd1 dxe4 25.b4 Rfd8 26.Qe1 Bh6 27.Ndxe4 Nxe4 28.Nxe4 Bxc1
29.Bxc1 Rf8 30.Kh1 Qc7 31.Bg5 Bxe4 32.Qxe4 Kh8 33.h4 c3 34.h5 gxh5 35.Qh4 
Qf7 36.Be4 Rbc8 37.Be7 c2 38.Bxf8 c1=Q 39.Rxc1 Rxc1+ 40.Kg2 Qxf8 41.Qg5 
Rc7 42.Qxe5+ 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.21"]
[Round "6"]
[White "Scholl, Eduard"]
[Black "Boersma, Paulus"]
[Result "1/2-1/2"]
[WhiteElo "2400"]
[BlackElo "2300"]
[EventDate "1973.04.16"]
[PlyCount "71"]
[ECO "B09"]

1.e4 d6 2.d4 g6 3.Nc3 Bg7 4.f4 Nf6 5.Nf3 c5 6.dxc5 Qa5 7.Bd3 Qxc5 8.Qe2 
Nbd7 9.Be3 Qc7 10.O-O a6 11.a4 b6 12.h3 Bb7 13.Qf2 O-O 14.f5 d5 15.e5 Ne4 
16.Qh4 Nxe5 17.Bxe4 dxe4 18.Ng5 h6 19.Ngxe4 gxf5 20.Rxf5 Ng6 21.Qf2 Bxe4 
22.Nxe4 Qc4 23.Nc3 b5 24.axb5 axb5 25.Rf1 Rac8 26.Nxb5 Qxc2 27.Nd4 Qxf2+ 
28.R5xf2 e6 29.Nf3 Rfd8 30.b4 Rc3 31.Bc5 Nf4 32.Rd2 Rxd2 33.Nxd2 Nd3 34.
Ne4 Rb3 35.Nf6+ Kh8 36.Ne8 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.21"]
[Round "6"]
[White "Sosonko, Gennadi"]
[Black "Van Baarle, John"]
[Result "1/2-1/2"]
[BlackElo "2320"]
[EventDate "1973.04.16"]
[PlyCount "41"]
[ECO "B08"]

1.e4 g6 2.d4 c6 3.Nc3 d6 4.Nf3 Bg7 5.Be2 Nf6 6.O-O O-O 7.Bf4 Nh5 8.Be3 Nd7
9.d5 Nhf6 10.Nd2 e6 11.Nc4 Nxe4 12.dxe6 Nxc3 13.bxc3 Ne5 14.Nxd6 fxe6 15.
Ne4 Nf7 16.Qxd8 Rxd8 17.Rad1 Re8 18.c4 e5 19.c5 Be6 20.c4 Red8 21.g4 
1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.21"]
[Round "6"]
[White "Van Scheltinga, Theodore"]
[Black "Van der Weide, Piet"]
[Result "1/2-1/2"]
[WhiteElo "2360"]
[BlackElo "2310"]
[EventDate "1973.04.16"]
[PlyCount "46"]
[ECO "A88"]

1.d4 f5 2.c4 Nf6 3.g3 d6 4.Nf3 g6 5.Bg2 Bg7 6.O-O O-O 7.Nc3 c6 8.Qc2 Na6 
9.a3 Qc7 10.b4 e5 11.e3 e4 12.Nd2 Be6 13.b5 Nb8 14.bxc6 bxc6 15.f3 exf3 
16.Bxf3 Nbd7 17.a4 Bf7 18.Ba3 Rfe8 19.Qd3 Rad8 20.Rfe1 c5 21.Rab1 a6 22.
Kg2 Rb8 23.h3 Nb6 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.21"]
[Round "6"]
[White "Zuidema, Coenraad"]
[Black "Enklaar, Bertus"]
[Result "1-0"]
[WhiteElo "2430"]
[BlackElo "2410"]
[EventDate "1973.04.16"]
[PlyCount "79"]
[ECO "B85"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 d6 6.Be2 Nf6 7.O-O Be7 8.Be3 
O-O 9.f4 Bd7 10.Nb3 Qc7 11.Kh1 a6 12.a4 b6 13.Bf3 Rab8 14.Qe2 Na5 15.Nd2 
Bc8 16.Bf2 Nd7 17.Rad1 Bf6 18.Ndb1 Bb7 19.Bd4 Rbc8 20.Bxf6 Nxf6 21.Na3 
Rfd8 22.Qf2 e5 23.f5 Nc6 24.Nd5 Nxd5 25.exd5 Nd4 26.f6 gxf6 27.Bh5 Qe7 28.
Rd3 Rc7 29.Bd1 Bc8 30.c3 Nf5 31.Rf3 Ng7 32.Rxf6 Ne8 33.Rh6 f5 34.g4 f4 35.
Bc2 Qf8 36.Bxh7+ Kg7 37.Qh4 Qe7 38.Rg6+ Kf7 39.Qh6 Qf8 40.Bg8+ 1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.23"]
[Round "7"]
[White "Boersma, Paulus"]
[Black "Marcus, Joost"]
[Result "1/2-1/2"]
[WhiteElo "2300"]
[EventDate "1973.04.16"]
[PlyCount "40"]
[ECO "A10"]

1.g3 g6 2.Bg2 d5 3.c4 c6 4.Qa4 Nd7 5.cxd5 Nb6 6.Qa5 cxd5 7.Nf3 Bg7 8.d3 
Nf6 9.Bf4 O-O 10.Be5 e6 11.Nbd2 Nbd7 12.Qxd8 Rxd8 13.Bd4 b6 14.Nb3 Bb7 15.
Kd2 Rdc8 16.Rhc1 Bf8 17.Rxc8 Rxc8 18.Rc1 Rxc1 19.Nxc1 Bd6 20.a3 Kf8 
1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.23"]
[Round "7"]
[White "Enklaar, Bertus"]
[Black "Scholl, Eduard"]
[Result "1-0"]
[WhiteElo "2410"]
[BlackElo "2400"]
[EventDate "1973.04.16"]
[PlyCount "201"]
[ECO "C93"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 Be7 7.Re1 O-O 8.c3 d6 
9.h3 h6 10.d4 Re8 11.Be3 Bf8 12.Nbd2 Bd7 13.Qb1 Qb8 14.a3 a5 15.a4 Nd8 16.
axb5 Bxb5 17.Qc2 Bc6 18.d5 Bd7 19.Ba4 c6 20.c4 Qc7 21.Rec1 Nb7 22.Ne1 Rec8
23.Qd1 Qd8 24.f3 Be7 25.Nd3 c5 26.Kh2 Bxa4 27.Rxa4 Nd7 28.g3 h5 29.h4 g6 
30.Qf1 Kh7 31.Qh3 Nf6 32.Rg1 Qd7 33.Ra3 Qxh3+ 34.Kxh3 Kg7 35.Rga1 Bd8 36.
Nf2 Be7 37.Nd1 Nd7 38.Nc3 Bd8 39.Rb3 Rcb8 40.Rb5 Nb6 41.f4 Nd7 42.f5 Nf6 
43.fxg6 Ng4 44.Bg1 fxg6 45.Nf3 Be7 46.Ra3 Nd8 47.Rxb8 Rxb8 48.Nb5 Ra8 49.
Nd2 Kh6 50.Be3+ Kh7 51.Nf3 Nf7 52.Kg2 Nxe3+ 53.Rxe3 Nh6 54.Rb3 Rb8 55.Ra3 
Ra8 56.Nd2 Ra6 57.Rb3 Bd8 58.Nc3 Ra7 59.Rb8 Nf7 60.Nb5 Rd7 61.Ra8 Kg7 62.
Nf3 Kf6 63.Ra6 Kg7 64.Kf2 Kf8 65.Ke2 Ke8 66.Kd3 Kf8 67.Kc2 Kg7 68.Kb3 Kh6 
69.Ka4 Kg7 70.Ra7 Rxa7 71.Nxa7 Kf8 72.Kb5 Ke8 73.Kc6 Be7 74.Nb5 Kd8 75.b3 
Ke8 76.Nc7+ Kd8 77.Ng5 Bxg5 78.Ne6+ Ke7 79.hxg5 Nh8 80.Kb6 Nf7 81.Kxa5 Kd7
82.Ka4 Kc8 83.b4 cxb4 84.Kxb4 Kd7 85.Kb5 Nh8 86.Ka6 Nf7 87.Ka7 Nh8 88.Kb8 
Nf7 89.Kb7 Nh8 90.Nf8+ Ke7 91.Nh7 Kd8 92.Kb6 Nf7 93.Kc6 Kc8 94.Nf8 Nxg5 
95.Kxd6 Nxe4+ 96.Kxe5 Nxg3 97.Nxg6 Ne2 98.c5 Nc3 99.d6 Nb5 100.c6 Kd8 101.
Nf4 1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.23"]
[Round "7"]
[White "Henneberke, Franciscus"]
[Black "Sosonko, Gennadi"]
[Result "1/2-1/2"]
[EventDate "1973.04.16"]
[PlyCount "73"]
[ECO "D41"]

1.Nf3 Nf6 2.c4 e6 3.d4 d5 4.Nc3 c5 5.cxd5 Nxd5 6.e4 Nxc3 7.bxc3 cxd4 8.
cxd4 Bb4+ 9.Bd2 Bxd2+ 10.Qxd2 O-O 11.Bc4 Nd7 12.O-O Nf6 13.Qf4 b6 14.Rad1 
Bb7 15.d5 exd5 16.exd5 Rc8 17.d6 Bxf3 18.gxf3 Qd7 19.Rd4 Rc5 20.Bd3 Re8 
21.Kh1 Nd5 22.Qg3 g6 23.Bc4 Nc3 24.Qg4 Qxg4 25.fxg4 b5 26.d7 Rd8 27.Re1 
Kf8 28.Re3 Rxc4 29.Rxc4 bxc4 30.Rxc3 Rxd7 31.Rxc4 Rd2 32.Ra4 Rxf2 33.Rxa7 
Kg7 34.Kg1 Rb2 35.Ra4 Kf6 36.Rf4+ Kg5 37.Rxf7 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.23"]
[Round "7"]
[White "Van Baarle, John"]
[Black "Zuidema, Coenraad"]
[Result "1/2-1/2"]
[WhiteElo "2320"]
[BlackElo "2430"]
[EventDate "1973.04.16"]
[PlyCount "117"]
[ECO "C78"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O b5 6.Bb3 Bb7 7.Re1 Bc5 8.c3 O-O
9.d4 Bb6 10.Bg5 h6 11.Bh4 Qe7 12.Nbd2 Kh8 13.dxe5 Nxe5 14.Nxe5 Qxe5 15.Nf3
Qf4 16.Bg3 Qg4 17.Ne5 Qxd1 18.Raxd1 Nxe4 19.Nxd7 Rfe8 20.Nxb6 cxb6 21.Bc7 
f6 22.Bxb6 Nd2 23.Rxe8+ Rxe8 24.Bf7 Re7 25.Bg6 Be4 26.Bxe4 Rxe4 27.b3 Re6 
28.Bd4 Ne4 29.f3 Nd6 30.Kf2 Kg8 31.Bc5 Nf7 32.Rd2 g5 33.Be3 Kg7 34.Rc2 Kg6
35.Rd2 h5 36.Rd5 Nd6 37.g3 g4 38.Bf4 Nf5 39.Rd8 Rc6 40.Rd3 Re6 41.Bd2 Rc6 
42.Rd8 Re6 43.a3 Rc6 44.fxg4 hxg4 45.Ke2 Ng7 46.Rd4 f5 47.Rd3 Ne6 48.Be3 
Ng5 49.Bxg5 Kxg5 50.Kd1 f4 51.gxf4+ Kxf4 52.Kc2 Rh6 53.Rd2 Rh3 54.Kb2 Ke3 
55.Rg2 Kf3 56.Rc2 Ke4 57.c4 bxc4 58.Rxc4+ Kd5 59.Rxg4 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.23"]
[Round "7"]
[White "Van der Vliet, Fredrik"]
[Black "Van Scheltinga, Theodore"]
[Result "1/2-1/2"]
[WhiteElo "2300"]
[BlackElo "2360"]
[EventDate "1973.04.16"]
[PlyCount "117"]
[ECO "A38"]

1.Nf3 Nf6 2.g3 g6 3.b3 Bg7 4.Bb2 c5 5.c4 d6 6.Bg2 O-O 7.O-O e5 8.d3 Nc6 9.
Nc3 h6 10.Nd2 Be6 11.Nd5 Qd7 12.a3 Bh3 13.Nxf6+ Bxf6 14.Ne4 Be7 15.Nc3 h5 
16.Nd5 h4 17.f4 hxg3 18.hxg3 f6 19.e4 Kg7 20.f5 Bxg2 21.Kxg2 Rh8 22.Qg4 g5
23.Rh1 Rag8 24.Rh5 Rxh5 25.Qxh5 Qe8 26.Qxe8 Rxe8 27.b4 Bd8 28.Bc3 Ne7 29.
Ne3 Bb6 30.Ng4 Ng8 31.Rb1 Re7 32.Bd2 Rd7 33.Rb3 Kf7 34.Kf3 Kg7 35.Bc1 Kf7 
36.Bd2 Kg7 37.Bc3 Ne7 38.Rb1 Ng8 39.Rh1 Rf7 40.Rh2 Rd7 41.Rb2 Ne7 42.Ra2 
Ng8 43.Bd2 Kf7 44.Be3 Bc7 45.Rh2 Kg7 46.Rb2 b6 47.Bd2 Rd8 48.Rb1 Kf7 49.
Rh1 Kg7 50.Ke2 Rb8 51.Rb1 Kf7 52.Be3 Kg7 53.Kd2 Kf7 54.Kc3 Kg7 55.Rb2 Nh6 
56.Nxh6 Kxh6 57.Rh2+ Kg7 58.Kb3 a6 59.Rh1 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.23"]
[Round "7"]
[White "Van der Weide, Piet"]
[Black "Hartoch, Robert"]
[Result "1-0"]
[WhiteElo "2310"]
[BlackElo "2430"]
[EventDate "1973.04.16"]
[PlyCount "81"]
[ECO "B48"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Be3 Qc7 7.Nb3 b5 8.f4 Bb7
9.Bd3 d6 10.O-O Nf6 11.a4 b4 12.Nb1 a5 13.N1d2 Be7 14.Qe2 O-O 15.g4 Nd7 
16.g5 Rfe8 17.Rf3 Bf8 18.Rh3 g6 19.Qf2 Bg7 20.Rf1 Bc8 21.Nc4 Rb8 22.Bc1 f5
23.gxf6 Nxf6 24.Qh4 d5 25.Ne5 dxe4 26.Bxe4 Ne7 27.Bd3 Bb7 28.Re1 Bd5 29.
Nd4 Nf5 30.Qf2 Qc5 31.Nxf5 Qxf2+ 32.Kxf2 exf5 33.Be3 Rbc8 34.Bb6 Bf8 35.
Rhe3 Rb8 36.Bd4 Ng4+ 37.Nxg4 Rxe3 38.Nxe3 Bf7 39.Bc4 Rc8 40.Bxf7+ Kxf7 41.
b3 1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.24"]
[Round "8"]
[White "Enklaar, Bertus"]
[Black "Van Baarle, John"]
[Result "1-0"]
[WhiteElo "2410"]
[BlackElo "2320"]
[EventDate "1973.04.16"]
[PlyCount "51"]
[ECO "B12"]

1.e4 g6 2.d4 c6 3.c4 d5 4.e5 Be6 5.cxd5 Bxd5 6.Nc3 f5 7.h4 e6 8.h5 g5 9.h6
g4 10.f3 gxf3 11.Nxf3 Ne7 12.Ng5 Qd7 13.Qh5+ Ng6 14.Rh3 Na6 15.Bxa6 bxa6 
16.Rg3 Rg8 17.Nxd5 cxd5 18.Bd2 Rc8 19.Rb3 a5 20.Bxa5 Qa4 21.Bc3 Qa6 22.Bd2
Rc2 23.Nxh7 Kd8 24.Nxf8 Rxd2 25.Qg5+ Ne7 26.Qxd2 1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.24"]
[Round "8"]
[White "Hartoch, Robert"]
[Black "Van der Vliet, Fredrik"]
[Result "1-0"]
[WhiteElo "2430"]
[BlackElo "2300"]
[EventDate "1973.04.16"]
[PlyCount "81"]
[ECO "E69"]

1.g3 g6 2.Bg2 Bg7 3.c4 Nf6 4.Nc3 O-O 5.d4 d6 6.Nf3 Nbd7 7.h3 c6 8.e4 e5 9.
O-O Qb6 10.Re1 Re8 11.d5 c5 12.Rb1 Re7 13.a3 Ne8 14.b4 Qd8 15.Nd2 b6 16.
Nb3 Nf8 17.Bd2 f6 18.Nc1 Rf7 19.Nd3 Rc7 20.Nb5 Rb7 21.Kh2 Qe7 22.Nc3 Rc7 
23.Qb3 Ba6 24.bxc5 dxc5 25.Qa4 Bb7 26.Nd1 Nd6 27.Ne3 Nd7 28.Qc2 Rf8 29.a4 
h5 30.h4 a5 31.Rf1 Ba6 32.Rbe1 f5 33.exf5 gxf5 34.Bh3 Qf6 35.Bc3 Qg6 36.
Ba1 Qe8 37.Nf4 exf4 38.Nxf5 Be5 39.Nxd6 fxg3+ 40.fxg3 Qe7 41.Qg6+ 1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.24"]
[Round "8"]
[White "Scholl, Eduard"]
[Black "Marcus, Joost"]
[Result "1/2-1/2"]
[WhiteElo "2400"]
[EventDate "1973.04.16"]
[PlyCount "113"]
[ECO "B30"]

1.e4 c5 2.Nf3 d6 3.Nc3 e5 4.Bc4 Nc6 5.O-O Be7 6.d3 Nf6 7.Nd5 O-O 8.c3 Be6 
9.Nxf6+ Bxf6 10.Be3 Qd7 11.Nd2 b6 12.Qa4 d5 13.Bb5 Rfc8 14.exd5 Bxd5 15.
Ba6 Rd8 16.Rad1 g6 17.Ne4 Bg7 18.Bg5 Re8 19.Nf6+ Bxf6 20.Bxf6 Re6 21.Bg5 
f6 22.Be3 Rd6 23.b3 Ne7 24.Qxd7 Rxd7 25.f3 Be6 26.Rfe1 Nd5 27.Bc4 Kf7 28.
Bxd5 Rxd5 29.f4 exf4 30.Bxf4 Rad8 31.d4 cxd4 32.Rxd4 Rxd4 33.cxd4 Rxd4 34.
Be3 Rd3 35.Kf2 Rd7 36.Rc1 Bf5 37.Rc3 Bb1 38.a3 Be4 39.Rc4 Re7 40.b4 Bxg2 
41.Bxb6 axb6 42.Kxg2 Re2+ 43.Kg1 g5 44.Rc7+ Kg6 45.Rb7 Ra2 46.Rxb6 Rxa3 
47.b5 Rb3 48.Rb8 f5 49.b6 f4 50.Rg8+ Kh6 51.h4 Kh5 52.Rxg5+ Kxh4 53.Rg7 h5
54.b7 Rb2 55.Kf1 Kh3 56.Kg1 h4 57.Kf1 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.24"]
[Round "8"]
[White "Sosonko, Gennadi"]
[Black "Van der Weide, Piet"]
[Result "1-0"]
[BlackElo "2310"]
[EventDate "1973.04.16"]
[PlyCount "69"]
[ECO "A81"]

1.Nf3 f5 2.g3 Nf6 3.Bg2 d6 4.d4 g6 5.b3 Bg7 6.Bb2 O-O 7.O-O Na6 8.Nbd2 c6 
9.a3 Bd7 10.b4 Nc7 11.c4 Qe8 12.Qb3 h6 13.Rae1 Qf7 14.e4 fxe4 15.Nxe4 b5 
16.Ned2 Be6 17.Rc1 bxc4 18.Nxc4 Bd5 19.Qd3 Ne6 20.Na5 Nh5 21.Nh4 g5 22.
Bxd5 cxd5 23.Ng2 Nf6 24.f3 Rfe8 25.Nc6 Nd8 26.Na5 Qe6 27.Ne3 Qd7 28.Qg6 e6
29.f4 Qf7 30.Qd3 Qh5 31.Rc7 Ne4 32.f5 Qh3 33.f6 Nxg3 34.Rxg7+ Kf8 35.Rg8+ 
1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.24"]
[Round "8"]
[White "Van Scheltinga, Theodore"]
[Black "Boersma, Paulus"]
[Result "1/2-1/2"]
[WhiteElo "2360"]
[BlackElo "2300"]
[EventDate "1973.04.16"]
[PlyCount "56"]
[ECO "A21"]

1.c4 d6 2.d4 e5 3.Nc3 exd4 4.Qxd4 Nc6 5.Qd1 g6 6.Nf3 Bg7 7.Nd5 Nce7 8.g3 
c6 9.Ne3 Nf6 10.Bg2 O-O 11.O-O d5 12.a4 h6 13.a5 c5 14.cxd5 Nfxd5 15.Nxd5 
Nxd5 16.a6 Nb4 17.Nd2 Rb8 18.axb7 Bxb7 19.Rxa7 Bxg2 20.Kxg2 Na2 21.Nc4 
Qxd1 22.Rxd1 Nxc1 23.Rxc1 Bxb2 24.Rc2 Bf6 25.Nd6 Rb2 26.Rxb2 Bxb2 27.Ra6 
Rd8 28.Rc6 Bg7 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.24"]
[Round "8"]
[White "Zuidema, Coenraad"]
[Black "Henneberke, Franciscus"]
[Result "1-0"]
[WhiteElo "2430"]
[EventDate "1973.04.16"]
[PlyCount "55"]
[ECO "B05"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.Be2 c6 6.Ng5 Bxe2 7.Qxe2 dxe5 8.dxe5
e6 9.O-O Nd7 10.c4 Ne7 11.Nc3 h5 12.Nce4 Nf5 13.Rd1 Qc7 14.Bf4 Nc5 15.Nd6+
Bxd6 16.exd6 Qd7 17.b4 Na4 18.Re1 c5 19.b5 Kf8 20.Qc2 Nb6 21.Rad1 Nd4 22.
Qd3 f6 23.Ne4 Rc8 24.Be3 e5 25.f4 f5 26.Nxc5 Rxc5 27.fxe5 Rxc4 28.Bxd4 1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.25"]
[Round "9"]
[White "Boersma, Paulus"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[WhiteElo "2300"]
[BlackElo "2430"]
[EventDate "1973.04.16"]
[PlyCount "113"]
[ECO "B25"]

1.g3 g6 2.Bg2 Bg7 3.e4 c5 4.d3 Nc6 5.Ne2 d6 6.O-O e5 7.Nec3 Nge7 8.Nd2 O-O
9.Nc4 Be6 10.Nd5 Qd7 11.c3 Kh8 12.a4 f5 13.Be3 Bg8 14.f4 exf4 15.Bxf4 Nxd5
16.exd5 Ne5 17.Qb3 Nxc4 18.Qxc4 Rfe8 19.Qb5 Qc7 20.a5 a6 21.Qb6 Qxb6 22.
axb6 Be5 23.Rfe1 Bxf4 24.gxf4 Kg7 25.Rxe8 Rxe8 26.Kf2 Kf6 27.h4 Bf7 28.c4 
h6 29.d4 cxd4 30.b4 d3 31.Bf1 Re4 32.Bxd3 Rxf4+ 33.Ke3 Rxh4 34.Rxa6 Bxd5 
35.cxd5 Rxb4 36.Ra8 Rxb6 37.Re8 h5 38.Re6+ Kg5 39.Kf2 h4 40.Be2 Kh6 41.Kg2
Kg5 42.Kf2 h3 43.Kg3 Rb3+ 44.Kh2 f4 45.Bf1 Kh4 46.Rxg6 Rb2+ 47.Kg1 h2+ 48.
Kh1 Rb1 49.Kxh2 Rxf1 50.Kg2 Rd1 51.Rxd6 Kg4 52.Rg6+ Kf5 53.Rb6 Rd2+ 54.Kf3
Rd3+ 55.Kg2 Kg4 56.Rg6+ Kf5 57.Rb6 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.25"]
[Round "9"]
[White "Henneberke, Franciscus"]
[Black "Enklaar, Bertus"]
[Result "0-1"]
[BlackElo "2410"]
[EventDate "1973.04.16"]
[PlyCount "64"]
[ECO "A31"]

1.d4 Nf6 2.c4 c5 3.Nf3 cxd4 4.Nxd4 b6 5.Nc3 Bb7 6.f3 d6 7.e4 e6 8.Be3 Nbd7
9.Be2 Be7 10.O-O O-O 11.Qd2 a6 12.Rfd1 Qc7 13.Rac1 Rac8 14.Bf1 Rfe8 15.Kh1
Ne5 16.b3 Bf8 17.Qf2 Kh8 18.Nde2 Nfd7 19.Nf4 g6 20.Nd3 f5 21.Nxe5 dxe5 22.
Bg5 f4 23.Qh4 Kg8 24.g3 Bc5 25.gxf4 Be3 26.Rc2 exf4 27.Bh3 b5 28.Rxd7 Qxd7
29.Nd5 Bxd5 30.exd5 bxc4 31.bxc4 Qa4 32.Re2 Qxc4 0-1

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.25"]
[Round "9"]
[White "Marcus, Joost"]
[Black "Van Scheltinga, Theodore"]
[Result "1-0"]
[BlackElo "2360"]
[EventDate "1973.04.16"]
[PlyCount "65"]
[ECO "E15"]

1.Nf3 Nf6 2.c4 e6 3.d4 b6 4.g3 Ba6 5.Nbd2 Bb4 6.a3 Bxd2+ 7.Nxd2 c6 8.Bg2 
d5 9.b3 O-O 10.O-O Nbd7 11.e4 Rc8 12.e5 Ne8 13.Re1 Nc7 14.Bb2 c5 15.Rc1 
cxd4 16.Bxd4 Nc5 17.Bxc5 bxc5 18.cxd5 Nxd5 19.Ne4 Qa5 20.Nd6 Rc7 21.Bxd5 
exd5 22.Qxd5 Bc8 23.Nxc8 Rcxc8 24.b4 Qxa3 25.bxc5 Rfd8 26.Qc4 Qb2 27.c6 
Rd2 28.e6 Rxf2 29.exf7+ Rxf7 30.Rf1 Qb6+ 31.Kg2 Rc7 32.Rxf7 Rxf7 33.Rf1 
1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.25"]
[Round "9"]
[White "Van Baarle, John"]
[Black "Scholl, Eduard"]
[Result "0-1"]
[WhiteElo "2320"]
[BlackElo "2400"]
[EventDate "1973.04.16"]
[PlyCount "50"]
[ECO "B89"]

1.e4 c5 2.Nf3 e6 3.Nc3 Nc6 4.d4 cxd4 5.Nxd4 d6 6.Be3 Nf6 7.Bc4 a6 8.Qe2 
Qc7 9.O-O-O Na5 10.Bd3 b5 11.g4 Bb7 12.g5 Nd7 13.Rhe1 Nc5 14.Bxb5+ axb5 
15.Ndxb5 Qb8 16.b4 Nxe4 17.Nxe4 Bxe4 18.Bf4 Bc6 19.Nxd6+ Bxd6 20.Bxd6 Qb7 
21.Qe5 Nc4 22.Qxg7 O-O-O 23.Bc5 Qa6 24.Kb1 Qa3 25.f4 e5 0-1

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.25"]
[Round "9"]
[White "Van der Vliet, Fredrik"]
[Black "Sosonko, Gennadi"]
[Result "1/2-1/2"]
[WhiteElo "2300"]
[EventDate "1973.04.16"]
[PlyCount "78"]
[ECO "A40"]

1.Nf3 c5 2.g3 g6 3.Bg2 Bg7 4.d4 cxd4 5.Nxd4 d5 6.O-O e6 7.c4 Ne7 8.cxd5 
exd5 9.Nc3 Nbc6 10.Be3 O-O 11.Nxc6 bxc6 12.Bd4 Bxd4 13.Qxd4 Nf5 14.Qd2 Ba6
15.Rfe1 Re8 16.e3 Qa5 17.Ne4 Qxd2 18.Nxd2 Rab8 19.b3 d4 20.Ne4 Red8 21.Nc5
Bc8 22.Red1 Rd6 23.g4 Ne7 24.Ne4 Rd8 25.Rxd4 Rxd4 26.exd4 Rb4 27.Rd1 Nd5 
28.g5 Nf4 29.Nf6+ Kg7 30.Bxc6 Ne2+ 31.Kg2 Nxd4 32.Be4 Ne6 33.h4 h6 34.Bd5 
Rxh4 35.Rc1 Nf4+ 36.Kg3 Ne2+ 37.Kxh4 Nxc1 38.Ne8+ Kh7 39.Bxf7 Nxa2 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.25"]
[Round "9"]
[White "Van der Weide, Piet"]
[Black "Zuidema, Coenraad"]
[Result "0-1"]
[WhiteElo "2310"]
[BlackElo "2430"]
[EventDate "1973.04.16"]
[PlyCount "54"]
[ECO "C25"]

1.e4 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3 g5 5.h4 g4 6.Ng5 h6 7.Nxf7 Kxf7 8.Bc4+ 
d5 9.Nxd5 Kg7 10.Nxf4 Nf6 11.d3 Bc5 12.Rf1 Ne5 13.Be6 g3 14.Qe2 Bf2+ 15.
Rxf2 gxf2+ 16.Qxf2 Qe8 17.Bxc8 Qxc8 18.Bd2 Qg4 19.Bc3 Nfd7 20.Kd2 Raf8 21.
Rf1 Kh7 22.d4 Ng6 23.g3 Nxf4 24.gxf4 Nf6 25.Kd3 Rhg8 26.d5 Qh3+ 27.Kd4 c5+
0-1

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.26"]
[Round "10"]
[White "Enklaar, Bertus"]
[Black "Van der Weide, Piet"]
[Result "1-0"]
[WhiteElo "2410"]
[BlackElo "2310"]
[EventDate "1973.04.16"]
[PlyCount "45"]
[ECO "B81"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.g4 a6 7.g5 Nfd7 8.Bg2 Nc6
9.h4 Nc5 10.f4 Bd7 11.Be3 b5 12.a3 Rc8 13.Qe2 Qc7 14.O-O Nxd4 15.Bxd4 Bc6 
16.h5 Rg8 17.Nd5 Qb7 18.h6 Nxe4 19.Qxe4 Bxd5 20.Qxh7 Bxg2 21.Rf2 Qe4 22.
Qxg8 Qxd4 23.c3 1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.26"]
[Round "10"]
[White "Hartoch, Robert"]
[Black "Marcus, Joost"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[EventDate "1973.04.16"]
[PlyCount "24"]
[ECO "A04"]

1.g3 Nf6 2.Bg2 d5 3.Nf3 g6 4.b3 c5 5.Bb2 Nc6 6.d4 cxd4 7.Nxd4 Bg7 8.O-O 
O-O 9.Nd2 Nxd4 10.Bxd4 Bg4 11.h3 Be6 12.Nf3 Rc8 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.26"]
[Round "10"]
[White "Scholl, Eduard"]
[Black "Van Scheltinga, Theodore"]
[Result "1-0"]
[WhiteElo "2400"]
[BlackElo "2360"]
[EventDate "1973.04.16"]
[PlyCount "59"]
[ECO "B69"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O-O-O 
Bd7 9.f4 Be7 10.Nf3 b5 11.Bxf6 gxf6 12.Bd3 Nb4 13.Kb1 Rc8 14.g4 Qa5 15.Nd4
Nxd3 16.Qxd3 b4 17.Nce2 Qb6 18.h4 a5 19.g5 a4 20.c4 bxc3 21.Nxc3 a3 22.b3 
fxg5 23.hxg5 e5 24.fxe5 dxe5 25.Nf5 Bxf5 26.exf5 Qc6 27.f6 Bb4 28.Nd5 Bc5 
29.Rhe1 Bd6 30.Nb4 1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.26"]
[Round "10"]
[White "Sosonko, Gennadi"]
[Black "Boersma, Paulus"]
[Result "1-0"]
[BlackElo "2300"]
[EventDate "1973.04.16"]
[PlyCount "81"]
[ECO "A53"]

1.d4 Nf6 2.Nf3 d6 3.c4 c6 4.Nc3 Bg4 5.e4 Nbd7 6.Be2 e5 7.O-O Be7 8.Be3 O-O
9.d5 Bh5 10.Nd2 Bg6 11.g3 Ne8 12.Bg4 Nb6 13.a4 a5 14.h4 h6 15.Bh3 Nd7 16.
Rb1 Nc5 17.Qc2 Na6 18.Na2 Nf6 19.Nc3 Nd7 20.Nb3 Nb4 21.Qe2 Kh8 22.Rbd1 f5 
23.exf5 Bxf5 24.Bxf5 Rxf5 25.dxc6 bxc6 26.Rd2 Rf7 27.Rfd1 Qf8 28.Qg4 Nf6 
29.Qe6 d5 30.cxd5 cxd5 31.Qxe5 Ng4 32.Qd4 Nxe3 33.Qxe3 Rf3 34.Qe2 Rc8 35.
Kg2 Rf6 36.Nxd5 Nxd5 37.Rxd5 Bb4 38.f4 Rfc6 39.Nd4 Rc4 40.Kh3 Qf7 41.Qe6 
1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.26"]
[Round "10"]
[White "Van Baarle, John"]
[Black "Henneberke, Franciscus"]
[Result "1-0"]
[WhiteElo "2320"]
[EventDate "1973.04.16"]
[PlyCount "83"]
[ECO "C87"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 Bd7 6.O-O Nf6 7.Re1 Be7 8.d4 O-O 
9.Nbd2 Re8 10.Nf1 Bf8 11.dxe5 dxe5 12.Bg5 b5 13.Bxf6 gxf6 14.Bc2 Ne7 15.
Nh4 Ng6 16.Qh5 Nxh4 17.Qxh4 Bg7 18.Qh5 Qe7 19.Re3 Rad8 20.Rg3 Be6 21.Qh6 
Qf8 22.Qxf6 Kh8 23.Qh4 f6 24.Bb3 Bc8 25.Re1 Re7 26.h3 Rd6 27.Ne3 c6 28.Qh5
Qe8 29.Qf3 Qd8 30.Qh5 Qe8 31.Qh4 Qf8 32.Bd1 Rd2 33.Bg4 Bxg4 34.Qxg4 Red7 
35.Nf5 Qf7 36.b3 a5 37.Kh2 Bf8 38.Re2 a4 39.bxa4 bxa4 40.a3 Bxa3 41.Rxd2 
Rxd2 42.Nh6 1-0

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.26"]
[Round "10"]
[White "Zuidema, Coenraad"]
[Black "Van der Vliet, Fredrik"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[BlackElo "2300"]
[EventDate "1973.04.16"]
[PlyCount "120"]
[ECO "B69"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.O-O-O 
Bd7 9.f4 Be7 10.Nf3 b5 11.Bxf6 Bxf6 12.Qxd6 Be7 13.Qd2 b4 14.Na4 Ra7 15.
Qe3 Qa5 16.b3 Rb7 17.Nd2 Na7 18.Nc4 Qc7 19.Ncb6 Bb5 20.e5 O-O 21.Bd3 Rfb8 
22.Nc4 Bxa4 23.bxa4 Bc5 24.Qe4 g6 25.Kb1 Rd8 26.Be2 Rbb8 27.Nb2 a5 28.Bc4 
Rxd1+ 29.Rxd1 Rd8 30.Rxd8+ Qxd8 31.Nd3 Bb6 32.g4 Qd4 33.Qxd4 Bxd4 34.a3 
bxa3 35.Ka2 Kf8 36.Kxa3 h6 37.Kb3 Ke7 38.Bb5 g5 39.fxg5 hxg5 40.c4 Bg1 41.
h3 Be3 42.c5 Kd8 43.Kc4 Bg1 44.Ne1 Bh2 45.Nf3 Bf4 46.Kd3 Bc1 47.Nd2 Bxd2 
48.Kxd2 Kc7 49.Kd3 Kd8 50.Ke4 Nc8 51.Bc6 Ne7 52.Ba8 Ng6 53.Kd4 Nf4 54.Kc4 
Kc7 55.Kb5 Nxh3 56.Bc6 Nf2 57.Be8 Nxg4 58.Bxf7 Nxe5 59.Bxe6 g4 60.Bd5 Nd7 
1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.28"]
[Round "11"]
[White "Boersma, Paulus"]
[Black "Zuidema, Coenraad"]
[Result "0-1"]
[WhiteElo "2300"]
[BlackElo "2430"]
[EventDate "1973.04.16"]
[PlyCount "84"]
[ECO "A13"]

1.c4 Nf6 2.Nf3 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+ Nbd7 6.O-O a6 7.Qxc4 b5 8.Qc6 
Rb8 9.Qc2 c5 10.a4 Bb7 11.axb5 axb5 12.d4 Qb6 13.Nbd2 cxd4 14.Nb3 e5 15.
Ng5 Bxg2 16.Kxg2 h6 17.Ne4 Qb7 18.f3 Nxe4 19.Na5 Qd5 20.fxe4 Qe6 21.Bd2 
Bd6 22.Nb7 O-O 23.Qc6 Rfc8 24.Qxd6 Rxb7 25.Qxe6 fxe6 26.Rfc1 Rbc7 27.Rxc7 
Rxc7 28.Ra8+ Kf7 29.Bb4 Nf6 30.Kf3 Rc2 31.Ra7+ Kg8 32.Ba3 b4 33.Bxb4 Rxb2 
34.Bd6 Rb3+ 35.Kg2 Re3 36.Ra8+ Kh7 37.Ra7 Rxe2+ 38.Kh3 Rxe4 39.Bf8 Nh5 40.
g4 Nf4+ 41.Kg3 Kg8 42.Bxg7 d3 0-1

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.28"]
[Round "11"]
[White "Henneberke, Franciscus"]
[Black "Scholl, Eduard"]
[Result "0-1"]
[BlackElo "2400"]
[EventDate "1973.04.16"]
[PlyCount "54"]
[ECO "A39"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 c5 5.Nf3 Nc6 6.Nc3 O-O 7.O-O cxd4 8.Nxd4 
Nxd4 9.Qxd4 d6 10.Bg5 Be6 11.Qh4 Qa5 12.Rac1 a6 13.Rfd1 Rac8 14.Bd5 Bxd5 
15.cxd5 b5 16.a3 Rc4 17.Rd4 Rfc8 18.Rcd1 h5 19.Rxc4 Rxc4 20.Rd4 Nxd5 21.
Rxc4 bxc4 22.Qxc4 Nxc3 23.Bd2 Qc5 24.Qxc5 Nxe2+ 25.Kf1 dxc5 26.Kxe2 Bxb2 
27.a4 c4 0-1

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.28"]
[Round "11"]
[White "Marcus, Joost"]
[Black "Sosonko, Gennadi"]
[Result "1/2-1/2"]
[EventDate "1973.04.16"]
[PlyCount "160"]
[ECO "E92"]

1.Nf3 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.d4 O-O 6.Be2 e5 7.Bg5 h6 8.Bh4 g5 9.
Bg3 g4 10.Nh4 exd4 11.Qxd4 Re8 12.Qd3 Nbd7 13.f3 Nc5 14.Qd2 Nh5 15.O-O-O 
Nxg3 16.hxg3 a5 17.Nf5 Bxf5 18.exf5 Qg5 19.Qxg5 hxg5 20.Kd2 Bxc3+ 21.bxc3 
Kg7 22.Rh5 gxf3 23.Bxf3 Ne4+ 24.Kc2 g4 25.Bxg4 Nf6 26.Rh4 Nxg4 27.Rxg4+ 
Kf6 28.Rf4 Re2+ 29.Rd2 Rae8 30.g4 R8e3 31.Rd4 Rxd2+ 32.Rxd2 Rg3 33.c5 dxc5
34.Rd7 Rxg2+ 35.Kb3 b5 36.Rxc7 c4+ 37.Ka3 Rg3 38.Rc5 b4+ 39.Ka4 Rxc3 40.
Kxa5 b3 41.axb3 Rxb3 42.Rxc4 Rb8 43.Rc7 Rg8 44.Rc4 Kg5 45.Kb4 Kh4 46.Kc3 
Rxg4 47.Rc7 f6 48.Kd3 Kg5 49.Ke3 Kxf5 50.Rc5+ Kg6 51.Kf2 f5 52.Ra5 Kg5 53.
Rb5 Ra4 54.Rb2 Kg4 55.Kg2 f4 56.Kf2 Ra8 57.Kg2 Rh8 58.Rb4 Ra8 59.Rb2 Ra3 
60.Kh2 Rh3+ 61.Kg1 Kg3 62.Rg2+ Kf3 63.Rf2+ Ke3 64.Ra2 Rh8 65.Ra3+ Ke2 66.
Ra2+ Kf3 67.Ra3+ Kg4 68.Kg2 Rb8 69.Rc3 Rb2+ 70.Kg1 Kf5 71.Ra3 Ke4 72.Kf1 
Rd2 73.Rb3 Rd3 74.Rxd3 Kxd3 75.Kf2 Ke4 76.Ke2 f3+ 77.Kf2 Kf4 78.Kf1 Ke3 
79.Ke1 f2+ 80.Kf1 Kf3 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.28"]
[Round "11"]
[White "Van Scheltinga, Theodore"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[WhiteElo "2360"]
[BlackElo "2430"]
[EventDate "1973.04.16"]
[PlyCount "50"]
[ECO "A31"]

1.Nf3 c5 2.c4 Nf6 3.Nc3 b6 4.e4 d6 5.d4 cxd4 6.Nxd4 Bb7 7.f3 Nbd7 8.Be2 a6
9.Be3 e6 10.O-O Be7 11.Qd2 O-O 12.Rad1 Rc8 13.Kh1 Qc7 14.Rc1 Rfe8 15.Qe1 
Bf8 16.Qf2 Qb8 17.Rfd1 Qa8 18.Nb3 d5 19.cxd5 exd5 20.exd5 Nxd5 21.Nxd5 
Bxd5 22.Rxc8 Rxc8 23.Bxb6 Bxb3 24.axb3 Qb7 25.Bd4 Qxb3 1/2-1/2

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.28"]
[Round "11"]
[White "Van der Vliet, Fredrik"]
[Black "Enklaar, Bertus"]
[Result "0-1"]
[WhiteElo "2300"]
[BlackElo "2410"]
[EventDate "1973.04.16"]
[PlyCount "100"]
[ECO "A46"]

1.Nf3 Nf6 2.b3 d6 3.d4 Bg4 4.e3 Nbd7 5.Be2 c6 6.Bb2 Qc7 7.O-O e5 8.h3 Bxf3
9.Bxf3 e4 10.Be2 g6 11.c4 Bg7 12.Nc3 O-O 13.b4 Rfe8 14.a4 h5 15.Qc2 Nf8 
16.c5 d5 17.b5 g5 18.Qd1 Re6 19.Bxh5 Nxh5 20.Qxh5 Nh7 21.f3 f5 22.fxe4 Rh6
23.Qe2 fxe4 24.Qg4 Kh8 25.Ne2 Rg8 26.Rf2 Rh4 27.Qg3 Qd8 28.Rf7 g4 29.Nf4 
Bf6 30.hxg4 Rgxg4 31.Qf2 Qg8 32.Rxb7 Ng5 33.Kf1 Ne6 34.Nh3 Rh6 35.b6 axb6 
36.cxb6 Bh4 37.Qe2 Rf6+ 38.Kg1 Rxg2+ 39.Qxg2 Rg6 40.Qxg6 Qxg6+ 41.Kh1 Qg3 
42.Ng1 Ng5 43.Ba3 Nf3 44.Bd6 Qxd6 45.Nxf3 exf3 46.Rf7 Qg3 47.Ra2 Qe1+ 48.
Kh2 f2 49.Kh3 f1=Q+ 50.Rxf1 Qg3# 0-1

[Event "29th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1973.04.28"]
[Round "11"]
[White "Van der Weide, Piet"]
[Black "Van Baarle, John"]
[Result "0-1"]
[WhiteElo "2310"]
[BlackElo "2320"]
[EventDate "1973.04.16"]
[PlyCount "110"]
[ECO "B11"]

1.e4 c6 2.Nc3 d5 3.Nf3 Bg4 4.h3 Bxf3 5.Qxf3 Nf6 6.d3 e6 7.Bd2 Bb4 8.a3 Bd6
9.g3 Qb6 10.Ra2 d4 11.Nb1 c5 12.Bg2 e5 13.O-O Qc7 14.Bg5 Nbd7 15.b3 Rc8 
16.a4 b6 17.Na3 a6 18.Nc4 b5 19.Nb2 O-O 20.h4 Be7 21.Rfa1 Rb8 22.Bh3 Rb7 
23.Qe2 Nb8 24.Rf1 Re8 25.Bd2 Nfd7 26.Raa1 Nc6 27.f3 Qd6 28.Kg2 Nb4 29.Bc1 
Bf6 30.Nd1 Rc7 31.Nb2 Nb6 32.a5 Nd7 33.Qd1 Nb8 34.Bd2 N8c6 35.Be1 Qd8 36.
h5 Bg5 37.f4 Bh6 38.Rf2 Rce7 39.Qf3 Rf8 40.Nd1 Qc7 41.Kh1 Ra8 42.Kg2 f6 
43.Kh1 Nxa5 44.Rg2 Nac6 45.c3 dxc3 46.Nxc3 Nd4 47.Qd1 exf4 48.gxf4 Bxf4 
49.Qg4 Rd8 50.Bh4 Kh8 51.Rf1 Be5 52.h6 Rf7 53.Qh5 g6 54.Qg4 Qd6 55.Bg3 
Rdf8 0-1
