[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.25"]
[Round "1"]
[White "Boersma, Paulus"]
[Black "Kuijf, Marinus"]
[Result "1-0"]
[WhiteElo "2335"]
[EventDate "1981.02.25"]
[PlyCount "60"]
[ECO "E45"]

1.c4 Nf6 2.Nc3 e6 3.d4 Bb4 4.e3 b6 5.Ne2 Ba6 6.a3 Be7 7.Nf4 d5 8.cxd5 Bxf1
9.Kxf1 Nxd5 10.e4 Nxc3 11.bxc3 c5 12.Be3 cxd4 13.Bxd4 O-O 14.Qg4 Bf6 15.e5
Bg5 16.Nh5 g6 17.h4 gxh5 18.Qf3 Nd7 19.hxg5 Qxg5 20.Rxh5 Qg6 21.g3 f6 22.
exf6 Nxf6 23.Rh4 Rae8 24.Re1 h5 25.Kg2 Nd5 26.Qe4 Rf5 27.c4 Nf6 28.Qc6 Ng4
29.f3 Nh6 30.Rhe4 Nf7 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.25"]
[Round "1"]
[White "Donner, Jan"]
[Black "Grooten, Herman"]
[Result "1-0"]
[WhiteElo "2475"]
[EventDate "1981.02.25"]
[PlyCount "97"]
[ECO "E41"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 Nc6 6.Nf3 Bxc3+ 7.bxc3 d6 8.e4 e5
9.d5 Ne7 10.Nh4 h6 11.g3 g5 12.Ng2 Bh3 13.Ne3 Qd7 14.f3 O-O-O 15.Rb1 h5 
16.Rb2 Nh7 17.Rg1 f5 18.exf5 Nxf5 19.g4 Nxe3 20.Bxe3 hxg4 21.fxg4 Qg7 22.
Bf5+ Kb8 23.Rg3 Nf6 24.Qb3 Rdf8 25.Bxg5 Rf7 26.Bxf6 Qxf6 27.Rf2 Qh4 28.Qc2
Rg7 29.g5 Bxf5 30.Qxf5 Qxc4 31.Qf6 Qe4+ 32.Kf1 Rgg8 33.Qxd6+ Ka8 34.g6 
Qb1+ 35.Kg2 Qe4+ 36.Kg1 Qe1+ 37.Rf1 Qe2 38.h3 Rc8 39.g7 Rxh3 40.Rxh3 Qg4+ 
41.Kf2 Qxh3 42.Qf8 Qh2+ 43.Ke3 Qg3+ 44.Kd2 Qg2+ 45.Kc1 Qg5+ 46.Kc2 Qg2+ 
47.Kb1 Kb8 48.Qd6+ Ka8 49.Rf8 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.25"]
[Round "1"]
[White "Langeweg, Christian"]
[Black "Bohm, Hans"]
[Result "1/2-1/2"]
[WhiteElo "2455"]
[BlackElo "2410"]
[EventDate "1981.02.25"]
[PlyCount "55"]
[ECO "E09"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 Be7 5.Bg2 O-O 6.O-O Nbd7 7.Qc2 c6 8.Nbd2 b6
9.e4 Bb7 10.b3 Rc8 11.Bb2 dxe4 12.Nxe4 Nxe4 13.Qxe4 Rc7 14.Rad1 Qa8 15.Qf4
Rcc8 16.Rfe1 Bf6 17.Ne5 Bxe5 18.dxe5 c5 19.Bxb7 Qxb7 20.Rd6 Rfd8 21.h4 Nf8
22.h5 h6 23.Red1 Rc7 24.R1d3 Rdd7 25.Rxd7 Nxd7 26.Qf3 Qxf3 27.Rxf3 Kf8 28.
Kg2 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.25"]
[Round "1"]
[White "Ree, Hans"]
[Black "Timman, Jan"]
[Result "0-1"]
[WhiteElo "2485"]
[BlackElo "2620"]
[EventDate "1981.02.25"]
[PlyCount "108"]
[ECO "D91"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg5 Ne4 6.Bh4 Nxc3 7.bxc3 dxc4 8.
Qa4+ Nd7 9.e3 c6 10.Qxc4 Qa5 11.Be2 Nb6 12.Qb4 Qxb4 13.cxb4 Nd5 14.a3 a5 
15.b5 c5 16.O-O cxd4 17.Nxd4 e5 18.Nb3 a4 19.Bc4 Nb6 20.Nd2 Bd7 21.Be2 h6 
22.e4 Rc8 23.Rfc1 O-O 24.Nc4 Bxb5 25.Nxb6 Rxc1+ 26.Rxc1 Bxe2 27.Be7 Re8 
28.Rc7 Bb5 29.f3 Bc6 30.Nd5 Rb8 31.Nb4 Be8 32.Nd5 Bc6 33.Kf2 Bf8 34.Bxf8 
Kxf8 35.Nb4 h5 36.h4 Ke8 37.Nxc6 bxc6 38.Ra7 Rb2+ 39.Kg3 c5 40.Rxa4 Kd7 
41.Ra7+ Kc6 42.Rxf7 c4 43.Rf8 Kc5 44.f4 Rb3+ 45.Kf2 exf4 46.Rxf4 Rxa3 47.
e5 Kd5 48.Ke2 Ra2+ 49.Kf3 c3 50.Rf8 Kxe5 51.Rc8 Kd4 52.g4 hxg4+ 53.Kxg4 
Ra4 54.Kf3 Kd3 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.25"]
[Round "1"]
[White "Stehouwer, Coen"]
[Black "Ligterink, Gert"]
[Result "0-1"]
[BlackElo "2430"]
[EventDate "1981.02.25"]
[PlyCount "84"]
[ECO "B64"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.O-O-O
O-O 9.f4 h6 10.Bh4 d5 11.e5 Nd7 12.Bxe7 Qxe7 13.Bb5 Nb6 14.Qf2 Bd7 15.Bxc6
bxc6 16.Nb3 f6 17.Rde1 fxe5 18.Rxe5 Qf6 19.Rf1 Nc4 20.Ree1 e5 21.Nd2 Nxd2 
22.Qxd2 exf4 23.Ne2 g5 24.h4 Rae8 25.hxg5 hxg5 26.Qa5 Bg4 27.Nc3 Qd4 28.
Rh1 f3 29.gxf3 Bxf3 30.Rhg1 g4 31.Qc7 Rxe1+ 32.Rxe1 Qf4+ 33.Qxf4 Rxf4 34.
Kd2 Rd4+ 35.Ke3 Rb4 36.Kd3 Rxb2 37.Re7 g3 38.Re5 g2 39.Rg5+ Kf7 40.Rg3 Ke6
41.a3 Ke5 42.Rg7 d4 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.25"]
[Round "1"]
[White "Van der Sterren, Paul"]
[Black "Van der Wiel, John"]
[Result "1/2-1/2"]
[WhiteElo "2440"]
[BlackElo "2465"]
[EventDate "1981.02.25"]
[PlyCount "63"]
[ECO "E12"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 c5 5.e3 g6 6.Nc3 Bg7 7.Bd3 O-O 8.O-O Bb7 9.
b4 Bxf3 10.Qxf3 Nc6 11.dxc5 bxc5 12.b5 Ne5 13.Qe2 Nfg4 14.Be4 Nxh2 15.Rd1 
Qh4 16.g3 Qh3 17.Bg2 Nef3+ 18.Bxf3 Nxf3+ 19.Qxf3 Bxc3 20.Ra2 Rad8 21.Bd2 
Bxd2 22.Raxd2 d5 23.cxd5 exd5 24.Rxd5 Qc8 25.Kg2 c4 26.Rc1 Qc7 27.Rxd8 
Rxd8 28.Qc6 Qa5 29.Qc5 a6 30.a4 axb5 31.axb5 Rb8 32.Rxc4 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.25"]
[Round "1"]
[White "Van der Vliet, Fredrik"]
[Black "Hartoch, Robert"]
[Result "1-0"]
[WhiteElo "2395"]
[BlackElo "2405"]
[EventDate "1981.02.25"]
[PlyCount "59"]
[ECO "D02"]

1.Nf3 Nf6 2.g3 d5 3.c4 c6 4.cxd5 cxd5 5.Bg2 Nc6 6.d4 Bg4 7.Ne5 e6 8.Nxg4 
Nxg4 9.e4 Nf6 10.exd5 Nxd5 11.O-O Be7 12.Nc3 O-O 13.Nxd5 exd5 14.Be3 Bf6 
15.Rc1 Rc8 16.Rc5 Qb6 17.Qd2 Be7 18.Rxd5 Nb4 19.Rd7 Qe6 20.Rxb7 Rc2 21.Qd1
Rfc8 22.d5 Qf6 23.Bh3 R8c4 24.b3 Rc7 25.Rb8+ Bf8 26.d6 R7c6 27.d7 Rd6 28.
d8=Q Rxd8 29.Rxd8 Rxa2 30.Bc5 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.26"]
[Round "2"]
[White "Bohm, Hans"]
[Black "Stehouwer, Coen"]
[Result "1/2-1/2"]
[WhiteElo "2410"]
[EventDate "1981.02.25"]
[PlyCount "74"]
[ECO "E52"]

1.d4 e6 2.Nf3 Nf6 3.c4 b6 4.Nc3 Bb4 5.Bd2 Bb7 6.e3 O-O 7.Bd3 d5 8.cxd5 
exd5 9.Ne5 Bd6 10.f4 c5 11.O-O Nc6 12.Rc1 a6 13.Rf3 g6 14.Be1 cxd4 15.Nxc6
Bxc6 16.exd4 Ne4 17.f5 b5 18.Bb1 b4 19.Ne2 Rc8 20.Ng3 Qg5 21.fxg6 hxg6 22.
b3 f5 23.Nf1 Bd7 24.Rxc8 Rxc8 25.Bc2 Qf6 26.h3 Bf8 27.Bg3 Nxg3 28.Nxg3 Bg7
29.Ne2 Bb5 30.Bd3 Bxd3 31.Qxd3 a5 32.Rf1 Qb6 33.Rd1 Re8 34.Kh1 Re4 35.Qc2 
Qa6 36.Ng3 Rxd4 37.Rd2 Qf6 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.26"]
[Round "2"]
[White "Hartoch, Robert"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[WhiteElo "2405"]
[BlackElo "2485"]
[EventDate "1981.02.25"]
[PlyCount "49"]
[ECO "A48"]

1.Nf3 Nf6 2.d4 g6 3.Bg5 Bg7 4.Nbd2 O-O 5.e4 d6 6.Bd3 h6 7.Bh4 Nc6 8.c3 Nh5
9.O-O Qe8 10.d5 Nd8 11.Nd4 Nf4 12.Bc4 e5 13.Ne2 g5 14.Bg3 f5 15.f3 Qg6 16.
Bf2 Nxe2+ 17.Bxe2 f4 18.g4 fxg3 19.hxg3 g4 20.Kg2 gxf3+ 21.Bxf3 Nf7 22.Bh5
Qg5 23.Qe2 Bf6 24.Be3 Qg7 25.Rh1 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.26"]
[Round "2"]
[White "Kuijf, Marinus"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[BlackElo "2455"]
[EventDate "1981.02.25"]
[PlyCount "80"]
[ECO "B85"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Be2 d6 7.O-O Nf6 8.Be3 
Be7 9.f4 O-O 10.Kh1 Bd7 11.Qe1 b5 12.a3 Qb8 13.Rd1 Nxd4 14.Bxd4 e5 15.fxe5
dxe5 16.Be3 Be6 17.Qg3 Kh8 18.Bg5 Ng8 19.Nd5 Bxg5 20.Qxg5 f6 21.Qh4 Bxd5 
22.exd5 Qd6 23.Bd3 Nh6 24.Qh3 Rae8 25.Be4 Rf7 26.b3 Rc7 27.Qd3 Rd8 28.Bxh7
Qxa3 29.Be4 Qb4 30.Rf3 a5 31.Qe3 Ng4 32.Qe2 Nh6 33.Rh3 a4 34.bxa4 bxa4 35.
Qf3 Kg8 36.c3 Qe7 37.Bb1 a3 38.Qd3 e4 39.Qe2 f5 40.Ba2 Rd6 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.26"]
[Round "2"]
[White "Ligterink, Gert"]
[Black "Van der Vliet, Fredrik"]
[Result "1-0"]
[WhiteElo "2430"]
[BlackElo "2395"]
[EventDate "1981.02.25"]
[PlyCount "59"]
[ECO "E73"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 c6 6.Bg5 a6 7.e5 dxe5 8.dxe5 
Qxd1+ 9.Rxd1 Nfd7 10.f4 h6 11.Bh4 g5 12.fxg5 Nxe5 13.Nf3 Nxf3+ 14.Bxf3 
hxg5 15.Bxg5 Bxc3+ 16.bxc3 Nd7 17.Bf4 Nc5 18.Be3 Na4 19.O-O Be6 20.Bd4 Rg8
21.Rb1 Bxc4 22.Rxb7 c5 23.Re1 Kf8 24.Be5 Rc8 25.Bc6 Bb5 26.Bxb5 axb5 27.
Bf4 Rg6 28.Rexe7 Rf6 29.Be5 Rf5 30.g4 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.26"]
[Round "2"]
[White "Timman, Jan"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[WhiteElo "2620"]
[BlackElo "2475"]
[EventDate "1981.02.25"]
[PlyCount "63"]
[ECO "D56"]

1.c4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 
Qxe7 9.Qc2 Nxc3 10.Qxc3 c6 11.Bd3 dxc4 12.Bxc4 b6 13.O-O Bb7 14.e4 c5 15.
d5 exd5 16.exd5 Nd7 17.Rfe1 Qd6 18.Nh4 g6 19.Qe3 Kg7 20.Qe7 Qxe7 21.Rxe7 
Rad8 22.Rae1 Bc8 23.f4 Nf6 24.Rxa7 Nxd5 25.f5 gxf5 26.Rd1 Be6 27.Rb7 Kf6 
28.Bxd5 Bxd5 29.Rxb6+ Kg5 30.Nf3+ Bxf3 31.Rxd8 Rxd8 32.gxf3 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.26"]
[Round "2"]
[White "Van der Sterren, Paul"]
[Black "Boersma, Paulus"]
[Result "0-1"]
[WhiteElo "2440"]
[BlackElo "2335"]
[EventDate "1981.02.25"]
[PlyCount "52"]
[ECO "B13"]

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qa5 7.Bxf6 exf6 8.c5 
Bxc5 9.dxc5 d4 10.Rc1 dxc3 11.Rxc3 Qxa2 12.Bc4 Qxb2 13.Re3+ Ne5 14.Rb3 Qa2
15.Bb5+ Nc6 16.Re3+ Be6 17.Ne2 Qa5+ 18.Nc3 O-O 19.O-O Rfd8 20.Qh5 Ne5 21.
f4 g6 22.Qe2 Ng4 23.Rg3 f5 24.h3 Nf6 25.Qe5 Nd5 26.Rb1 a6 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.26"]
[Round "2"]
[White "Van der Wiel, John"]
[Black "Grooten, Herman"]
[Result "1-0"]
[WhiteElo "2465"]
[EventDate "1981.02.25"]
[PlyCount "57"]
[ECO "B96"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 b5 8.e5 dxe5 
9.fxe5 Qc7 10.exf6 Qe5+ 11.Be2 Qxg5 12.Qd3 Qxf6 13.Rf1 Qe5 14.Rd1 Ra7 15.
Nf3 Qc7 16.Ng5 f5 17.Qd4 h5 18.Rxf5 exf5 19.Nd5 Qa5+ 20.c3 Bd6 21.Nf6+ 
gxf6 22.Qxf6 Re7 23.Rxd6 Rg8 24.Kf1 Bd7 25.Bxh5+ Kd8 26.Ne6+ Kc8 27.Qxe7 
Qxa2 28.Rxd7 Nxd7 29.Qd6 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.27"]
[Round "3"]
[White "Boersma, Paulus"]
[Black "Van der Wiel, John"]
[Result "0-1"]
[WhiteElo "2335"]
[BlackElo "2465"]
[EventDate "1981.02.25"]
[PlyCount "58"]
[ECO "E15"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Nbd2 Bb4 6.Qb3 c5 7.Bg2 Nc6 8.Ne5 
Nxd4 9.Qd1 Rb8 10.O-O b5 11.Ne4 Nxe4 12.Bxe4 bxc4 13.e3 Nf5 14.Qa4 Bb5 15.
Qxa7 Qb6 16.Qxb6 Rxb6 17.a3 Ba5 18.Nxc4 Bxc4 19.b4 Bxf1 20.bxa5 Ra6 21.
Kxf1 Nd6 22.Bd3 Rxa5 23.a4 Ke7 24.Bd2 Ra7 25.e4 Rha8 26.e5 Nf5 27.a5 Nd4 
28.Be4 Nb3 29.Bxa8 Nxa1 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.27"]
[Round "3"]
[White "Donner, Jan"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[WhiteElo "2475"]
[BlackElo "2405"]
[EventDate "1981.02.25"]
[PlyCount "66"]
[ECO "E70"]

1.d4 Nf6 2.c4 c5 3.d5 g6 4.Nc3 Bg7 5.e4 d6 6.Bd3 O-O 7.Nge2 e6 8.h3 exd5 
9.exd5 Nbd7 10.f4 a6 11.a4 Nh5 12.O-O f5 13.Be3 Re8 14.Bf2 Nf8 15.Qd2 Bd7 
16.Ra3 a5 17.Kh1 b6 18.Ng1 Ra7 19.Be2 Nf6 20.Bh4 Bc8 21.Nf3 Rae7 22.Bd3 
N8d7 23.Rg1 Nb8 24.Raa1 Na6 25.Raf1 Nb4 26.Bb1 Kh8 27.Nh2 Re3 28.Bf2 R3e7 
29.g4 Rf7 30.gxf5 Bxf5 31.Bxf5 gxf5 32.Nf3 h6 33.Bh4 Qd7 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.27"]
[Round "3"]
[White "Grooten, Herman"]
[Black "Timman, Jan"]
[Result "0-1"]
[BlackElo "2620"]
[EventDate "1981.02.25"]
[PlyCount "58"]
[ECO "A28"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.e3 Bb4 5.Qc2 Bxc3 6.Qxc3 Qe7 7.a3 a5 8.b3 d5
9.cxd5 Nxd5 10.Qb2 O-O 11.d3 Bg4 12.Be2 f5 13.h3 Bh5 14.O-O f4 15.Nxe5 
Bxe2 16.Nxc6 bxc6 17.Qxe2 f3 18.Qb2 fxg2 19.Kxg2 Qg5+ 20.Kh2 Rf3 21.Rg1 
Rxh3+ 22.Kxh3 Qxg1 23.f3 Nxe3 24.Qe2 Qh1+ 25.Kg3 Nf5+ 26.Kf2 Qh2+ 27.Ke1 
Qg1+ 28.Kd2 Nd4 29.Qd1 Qf2+ 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.27"]
[Round "3"]
[White "Langeweg, Christian"]
[Black "Van der Sterren, Paul"]
[Result "1/2-1/2"]
[WhiteElo "2455"]
[BlackElo "2440"]
[EventDate "1981.02.25"]
[PlyCount "56"]
[ECO "E94"]

1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.Nc3 O-O 5.e4 d6 6.Be2 e5 7.Be3 c6 8.O-O Nbd7 
9.Qc2 Qe7 10.Rfe1 Ng4 11.Bg5 f6 12.Bh4 exd4 13.Nxd4 Nc5 14.Rad1 a5 15.b3 
Qc7 16.Bf1 Bh6 17.Bg3 Ne5 18.f3 Bd7 19.Bf2 Be8 20.Kh1 Bf7 21.g3 Rfe8 22.f4
Ned7 23.Rd2 Re7 24.Red1 Bf8 25.h4 h5 26.Bg2 Ree8 27.Nf3 Rad8 28.Bh3 b6 
1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.27"]
[Round "3"]
[White "Ree, Hans"]
[Black "Ligterink, Gert"]
[Result "1/2-1/2"]
[WhiteElo "2485"]
[BlackElo "2430"]
[EventDate "1981.02.25"]
[PlyCount "54"]
[ECO "E14"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.e3 Bb7 5.Bd3 d5 6.O-O Nbd7 7.Nc3 Bd6 8.Qe2 O-O
9.e4 dxe4 10.Nxe4 Nxe4 11.Bxe4 Bxe4 12.Qxe4 c5 13.Rd1 Qc7 14.Bg5 Rae8 15.
Rac1 e5 16.dxc5 Bxc5 17.Nh4 g6 18.b4 Be7 19.Bh6 f5 20.Qd5+ Rf7 21.Nf3 e4 
22.Qe6 Nf8 23.Bxf8 Kxf8 24.Ne5 Bg5 25.Qxf7+ Qxf7 26.Nxf7 Bxc1 27.Rxc1 Kxf7
1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.27"]
[Round "3"]
[White "Stehouwer, Coen"]
[Black "Kuijf, Marinus"]
[Result "1/2-1/2"]
[EventDate "1981.02.25"]
[PlyCount "47"]
[ECO "B33"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Ndb5 d6 7.Bf4 e5 8.Bg5 
a6 9.Na3 b5 10.Nd5 Qa5+ 11.Bd2 Qd8 12.Bg5 Be7 13.Bxf6 Bxf6 14.c4 O-O 15.
Nc2 Rb8 16.Be2 Bg5 17.O-O Be6 18.Ncb4 Nxb4 19.Nxb4 Qb6 20.Qd3 Bxc4 21.Qd1 
Be6 22.Qd3 Bc4 23.Qf3 Be6 24.Qd3 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.27"]
[Round "3"]
[White "Van der Vliet, Fredrik"]
[Black "Bohm, Hans"]
[Result "1/2-1/2"]
[WhiteElo "2395"]
[BlackElo "2410"]
[EventDate "1981.02.25"]
[PlyCount "81"]
[ECO "E08"]

1.c4 Nf6 2.Nf3 e6 3.g3 d5 4.Bg2 Be7 5.O-O O-O 6.d4 Nbd7 7.Qc2 c6 8.b3 b5 
9.c5 Ne4 10.Bb2 f5 11.Ne1 Qe8 12.f3 Nef6 13.Nd3 a5 14.a3 g5 15.Nd2 Bd8 16.
e4 Ra7 17.Rae1 Qf7 18.Rf2 Nh5 19.Bh3 Ng7 20.Rfe2 Qh5 21.Bg2 f4 22.e5 Rf7 
23.Nf1 Qg6 24.Nf2 Nf8 25.Qxg6 Nxg6 26.g4 b4 27.a4 Ba6 28.Rc2 Nh4 29.Nd2 
Nxg2 30.Kxg2 Ne8 31.Rcc1 h5 32.h3 Rh7 33.Rh1 Rh8 34.Ba1 Rah7 35.Bb2 Nc7 
36.Ba1 Bc8 37.Bb2 Na6 38.Ba1 Nb8 39.Bb2 Ba6 40.Rce1 Nd7 41.Ba1 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.28"]
[Round "4"]
[White "Boersma, Paulus"]
[Black "Langeweg, Christian"]
[Result "0-1"]
[WhiteElo "2335"]
[BlackElo "2455"]
[EventDate "1981.02.25"]
[PlyCount "46"]
[ECO "A36"]

1.c4 c5 2.g3 Nc6 3.Bg2 g6 4.Nc3 Bg7 5.a3 d6 6.Rb1 a5 7.d3 e5 8.h4 h6 9.h5 
g5 10.e4 f5 11.exf5 Bxf5 12.g4 Be6 13.Bd5 Bxd5 14.Nxd5 Nf6 15.Nxf6+ Qxf6 
16.Qf3 O-O 17.Qxf6 Rxf6 18.Be3 e4 19.dxe4 Ne5 20.Ne2 Nxc4 21.Ng3 Ne5 22.
Nf5 Nxg4 23.Bd2 Re8 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.28"]
[Round "4"]
[White "Bohm, Hans"]
[Black "Ree, Hans"]
[Result "0-1"]
[WhiteElo "2410"]
[BlackElo "2485"]
[EventDate "1981.02.25"]
[PlyCount "58"]
[ECO "E72"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 O-O 5.g3 d6 6.Bg2 c5 7.d5 a6 8.Nge2 e6 9.
dxe6 Bxe6 10.b3 Nc6 11.O-O Qd7 12.Be3 b5 13.Nd5 Rab8 14.cxb5 axb5 15.Rc1 
b4 16.Nef4 Ne8 17.Qd2 Nd4 18.Ne2 Nxe2+ 19.Qxe2 Bxd5 20.exd5 Nc7 21.Qd3 Ra8
22.Rc2 Ra7 23.Re1 Rfa8 24.Ree2 Nb5 25.Red2 Nc3 26.h4 Nxa2 27.Kh2 Nc3 28.
Bf4 Ra1 29.Bh3 Rh1+ 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.28"]
[Round "4"]
[White "Hartoch, Robert"]
[Black "Grooten, Herman"]
[Result "1-0"]
[WhiteElo "2405"]
[EventDate "1981.02.25"]
[PlyCount "97"]
[ECO "A46"]

1.Nf3 Nf6 2.d4 e6 3.g3 b5 4.Bg2 Bb7 5.O-O c5 6.c3 Qb6 7.Bg5 Ne4 8.Be3 d6 
9.Nbd2 Nd7 10.dxc5 dxc5 11.a4 Nxd2 12.Qxd2 Be7 13.axb5 Qxb5 14.c4 Qb6 15.
Rfd1 Nf6 16.Ne5 Bxg2 17.Kxg2 O-O 18.f3 Rfd8 19.Qc2 h6 20.Rxd8+ Rxd8 21.Nd3
e5 22.b4 e4 23.Nxc5 exf3+ 24.exf3 Qxb4 25.Na6 Qb7 26.Qb1 Qc8 27.Qb5 Rd3 
28.Bxa7 Qe6 29.Rf1 Ra3 30.Nc7 Qe2+ 31.Rf2 Qe1 32.Bd4 Ra5 33.Qb7 Rg5 34.
Qa8+ Kh7 35.Ne8 Nxe8 36.Qxe8 Qe6 37.Qa4 h5 38.Qc2+ Kg8 39.Re2 Qd6 40.Qe4 
Rg6 41.Qxe7 Qxd4 42.Qe8+ Kh7 43.Qxf7 Qd3 44.Re5 Qd2+ 45.Kh3 Kh6 46.Re8 Kh7
47.Qg8+ Kh6 48.Qh8+ Kg5 49.f4+ 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.28"]
[Round "4"]
[White "Kuijf, Marinus"]
[Black "Van der Vliet, Fredrik"]
[Result "1/2-1/2"]
[BlackElo "2395"]
[EventDate "1981.02.25"]
[PlyCount "58"]
[ECO "B82"]

1.e4 c5 2.Nc3 e6 3.Nf3 d6 4.d4 cxd4 5.Nxd4 Nf6 6.f4 Nc6 7.Be3 e5 8.Nf3 Be7
9.Qd2 Qa5 10.Bc4 Be6 11.Bxe6 fxe6 12.Ng5 Nd8 13.h3 h6 14.Nf3 exf4 15.Bxf4 
e5 16.Be3 Qb4 17.a3 Qc4 18.Qd3 Qxd3 19.cxd3 a6 20.Ke2 Nc6 21.Rac1 Bd8 22.
Rhd1 O-O 23.g4 Rf7 24.Rg1 Rd7 25.g5 hxg5 26.Bxg5 Nh7 27.Bxd8 Raxd8 28.Nd5 
Rf8 29.Rcf1 Rdf7 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.28"]
[Round "4"]
[White "Ligterink, Gert"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[BlackElo "2475"]
[EventDate "1981.02.25"]
[PlyCount "43"]
[ECO "B09"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Be3 c5 7.dxc5 Qa5 8.Bd3 Ng4
9.Bd2 Qxc5 10.Qe2 Nf6 11.O-O-O Nc6 12.h3 Nb4 13.g4 Nxd3+ 14.Qxd3 Be6 15.
Be3 Qa5 16.Kb1 Rfc8 17.Bd4 b5 18.b3 b4 19.Ne2 Bd7 20.c4 bxc3 21.Nxc3 Bc6 
22.Rhe1 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.28"]
[Round "4"]
[White "Van der Sterren, Paul"]
[Black "Stehouwer, Coen"]
[Result "0-1"]
[WhiteElo "2440"]
[EventDate "1981.02.25"]
[PlyCount "80"]
[ECO "E12"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 c5 5.d5 Ba6 6.Qc2 exd5 7.cxd5 g6 8.Nc3 Bg7 
9.g3 O-O 10.Bg2 d6 11.O-O b5 12.Re1 Nbd7 13.h3 Re8 14.e4 Rc8 15.Bf4 Qb6 
16.Bf1 c4 17.Rad1 Nc5 18.Nd4 Nfd7 19.Nc6 Ne5 20.Re3 Bb7 21.Nd4 a6 22.b4 
cxb3 23.Nxb3 Nxb3 24.Qxb3 Nc4 25.Rf3 Ne5 26.Re3 Nc4 27.Rf3 Ne5 28.Re3 Rc7 
29.Nb1 Nc4 30.Bxc4 Rxc4 31.Nd2 Ra4 32.Rde1 Bd4 33.R3e2 Rc8 34.Be3 Qa5 35.
Bxd4 Rxd4 36.Nf3 Rc3 37.Qb2 Rdd3 38.Nd2 Qxa3 39.Qb1 Qc5 40.Kg2 b4 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.02.28"]
[Round "4"]
[White "Van der Wiel, John"]
[Black "Timman, Jan"]
[Result "1/2-1/2"]
[WhiteElo "2465"]
[BlackElo "2620"]
[EventDate "1981.02.25"]
[PlyCount "57"]
[ECO "C58"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.
Qf3 Rb8 9.Bd3 h6 10.Ne4 Nd5 11.b3 g6 12.Qg3 Nf4 13.Bb2 Bg7 14.Ba3 Nb7 15.
Nbc3 f5 16.Ne2 g5 17.Nxf4 exf4 18.Qf3 Qa5 19.Nd6+ Nxd6 20.Qxc6+ Kf7 21.
Bxd6 Re8+ 22.Kd1 Bxa1 23.Bc4+ Be6 24.Re1 Bxc4 25.Qxc4+ Kg6 26.Bxb8 Rxb8 
27.c3 Qxa2 28.Re6+ Kh5 29.Rxh6+ 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.02"]
[Round "5"]
[White "Donner, Jan"]
[Black "Bohm, Hans"]
[Result "1-0"]
[WhiteElo "2475"]
[BlackElo "2410"]
[EventDate "1981.02.25"]
[PlyCount "75"]
[ECO "E23"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qb3 c5 5.dxc5 Nc6 6.Nf3 Ne4 7.Bd2 Nxd2 8.Nxd2
O-O 9.e3 Bxc5 10.Be2 f5 11.O-O b6 12.g3 Bb7 13.Bf3 Qc8 14.Rac1 Ne5 15.Bxb7
Qxb7 16.Ne2 Rad8 17.Qc3 Nf7 18.b4 Be7 19.Nd4 Bf6 20.Qd3 g6 21.Qe2 e5 22.
N4b3 e4 23.f4 exf3 24.Nxf3 Rfe8 25.Rfd1 Re7 26.Rd3 Rde8 27.Nbd2 Ng5 28.
Nxg5 Bxg5 29.Nf1 Re4 30.Qd2 R8e7 31.a3 f4 32.gxf4 Bxf4 33.Qg2 Bh6 34.Ng3 
Qc6 35.Nxe4 Rxe4 36.Kh1 Bxe3 37.Re1 Qxc4 38.Qe2 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.02"]
[Round "5"]
[White "Grooten, Herman"]
[Black "Ligterink, Gert"]
[Result "1-0"]
[BlackElo "2430"]
[EventDate "1981.02.25"]
[PlyCount "82"]
[ECO "A28"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.e3 Bb4 5.Qc2 Bxc3 6.Qxc3 Qe7 7.a3 a5 8.b4 
axb4 9.axb4 Rxa1 10.Qxa1 e4 11.b5 exf3 12.bxc6 fxg2 13.cxd7+ Qxd7 14.Bxg2 
O-O 15.Rg1 Qg4 16.Bb2 Nh5 17.h3 Qg6 18.Ke2 Re8 19.Be5 Qe6 20.f4 Qxc4+ 21.
Ke1 f6 22.Qa5 c6 23.Bf1 Qc1+ 24.Kf2 fxe5 25.Be2 Qb2 26.Bxh5 Rf8 27.Kg3 
exf4+ 28.exf4 Qd4 29.Rf1 Be6 30.Rf2 Bd5 31.Bg4 g5 32.Qc7 gxf4+ 33.Rxf4 
Qg1+ 34.Kh4 Qe1+ 35.Kg5 Qxd2 36.Bf5 Bf7 37.Qe5 Re8 38.Bxh7+ Kf8 39.Qh8+ 
Ke7 40.Qf6+ Kd7 41.Qxf7+ Re7 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.02"]
[Round "5"]
[White "Langeweg, Christian"]
[Black "Van der Wiel, John"]
[Result "1/2-1/2"]
[WhiteElo "2455"]
[BlackElo "2465"]
[EventDate "1981.02.25"]
[PlyCount "28"]
[ECO "E15"]

1.d4 Nf6 2.Nf3 e6 3.c4 b6 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 c6 8.O-O d5 
9.Bc3 Ne4 10.Bb2 Nd7 11.Nbd2 f5 12.Rc1 Rc8 13.Ne1 Bg5 14.e3 O-O 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.02"]
[Round "5"]
[White "Ree, Hans"]
[Black "Kuijf, Marinus"]
[Result "0-1"]
[WhiteElo "2485"]
[EventDate "1981.02.25"]
[PlyCount "46"]
[ECO "A32"]

1.c4 Nf6 2.Nc3 e6 3.Nf3 c5 4.d4 cxd4 5.Nxd4 Bb4 6.Bg5 a6 7.Rc1 b6 8.Qb3 
Be7 9.e3 Bb7 10.Na4 b5 11.cxb5 axb5 12.Nxb5 Qa5+ 13.Nac3 O-O 14.Bd3 Bxg2 
15.Rg1 Bc6 16.Qc4 Bxb5 17.Qxb5 Qc7 18.Bh6 Ne8 19.Ke2 Nc6 20.Bxg7 Nxg7 21.
Bxh7+ Kxh7 22.Rxg7+ Kxg7 23.Qh5 Ne5 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.02"]
[Round "5"]
[White "Stehouwer, Coen"]
[Black "Boersma, Paulus"]
[Result "0-1"]
[BlackElo "2335"]
[EventDate "1981.02.25"]
[PlyCount "80"]
[ECO "B13"]

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 Nc6 6.Bg5 Qa5 7.Bxf6 exf6 8.
cxd5 Bb4 9.Qd2 Bxc3 10.bxc3 Qxd5 11.Ne2 O-O 12.Nf4 Qa5 13.Be2 Rd8 14.Rd1 
b6 15.O-O Ba6 16.Rfe1 Bxe2 17.Rxe2 Ne5 18.Qe1 Nc4 19.Rd3 g6 20.Rh3 Qb5 21.
a4 Qxa4 22.f3 Re8 23.Nd5 Rxe2 24.Qxe2 Qa1+ 25.Kf2 Qb2 26.Nxf6+ Kg7 27.Qxb2
Nxb2 28.Nxh7 f6 29.g4 Rh8 30.d5 Nc4 31.g5 Rxh7 32.gxf6+ Kg8 33.Rxh7 Kxh7 
34.Ke2 Kg8 35.Kd3 Ne5+ 36.Ke4 Nd7 37.d6 Kf7 38.Kd5 Kxf6 39.f4 a5 40.h4 a4 
0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.02"]
[Round "5"]
[White "Timman, Jan"]
[Black "Hartoch, Robert"]
[Result "1-0"]
[WhiteElo "2620"]
[BlackElo "2405"]
[EventDate "1981.02.25"]
[PlyCount "69"]
[ECO "B09"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Be3 c5 7.dxc5 Qa5 8.Bd3 Ng4
9.Bd2 Qxc5 10.Qe2 Nf6 11.O-O-O Nc6 12.Na4 Nd4 13.Qe3 Ng4 14.Nxc5 Nxe3 15.
Bxe3 dxc5 16.Bxd4 cxd4 17.e5 Rd8 18.h3 f6 19.Bc4+ Kf8 20.e6 b6 21.Rxd4 
Rxd4 22.Nxd4 Bb7 23.Rg1 f5 24.Ne2 Rc8 25.Bb3 Ba6 26.Re1 Bf6 27.Nc3 Bxc3 
28.bxc3 Kg7 29.Rd1 Kf6 30.Rd4 Rxc3 31.Kd2 Rc6 32.Rd7 Bc8 33.Rxa7 Bxe6 34.
a4 Bc8 35.Kd3 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.02"]
[Round "5"]
[White "Van der Vliet, Fredrik"]
[Black "Van der Sterren, Paul"]
[Result "1-0"]
[WhiteElo "2395"]
[BlackElo "2440"]
[EventDate "1981.02.25"]
[PlyCount "63"]
[ECO "A32"]

1.d4 Nf6 2.c4 e6 3.g3 c5 4.Nf3 cxd4 5.Nxd4 Qc7 6.Nd2 Nc6 7.Nb5 Qb8 8.Bg2 
Be7 9.O-O a6 10.Nc3 b5 11.e4 O-O 12.b3 Ra7 13.Bb2 d6 14.Rc1 Bd7 15.f4 Rc8 
16.Qe2 Be8 17.Kh1 h6 18.Nd1 bxc4 19.Nxc4 d5 20.exd5 exd5 21.Nce3 Nb4 22.
Be5 Qa8 23.Nc3 Bb5 24.Nxb5 Rxc1 25.Rxc1 axb5 26.Nf5 Bd8 27.Qxb5 Rb7 28.Qc5
Nxa2 29.Qc8 Qxc8 30.Rxc8 Rd7 31.Nd4 Nb4 32.Bh3 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.03"]
[Round "6"]
[White "Boersma, Paulus"]
[Black "Van der Vliet, Fredrik"]
[Result "1-0"]
[WhiteElo "2335"]
[BlackElo "2395"]
[EventDate "1981.02.25"]
[PlyCount "66"]
[ECO "E45"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2 Ba6 6.a3 Be7 7.Nf4 d5 8.cxd5 Bxf1
9.Kxf1 Nxd5 10.e4 Nxc3 11.bxc3 c5 12.Be3 Nd7 13.Qg4 cxd4 14.cxd4 O-O 15.e5
b5 16.h4 Nb6 17.Nh5 g6 18.Nf4 Nd5 19.Nxd5 exd5 20.Bh6 Qc8 21.e6 Rd8 22.Re1
f5 23.Qg3 Qc4+ 24.Kg1 Qxd4 25.h5 Qf6 26.hxg6 hxg6 27.Bf4 Qg7 28.Be5 Bf6 
29.Bxf6 Qxf6 30.Rh6 Kg7 31.Qh3 Rh8 32.Rxh8 Rxh8 33.Qxh8+ Kxh8 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.03"]
[Round "6"]
[White "Bohm, Hans"]
[Black "Grooten, Herman"]
[Result "0-1"]
[WhiteElo "2410"]
[EventDate "1981.02.25"]
[PlyCount "68"]
[ECO "E39"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 O-O 6.a3 Bxc5 7.Nf3 Nc6 8.Bg5 
Nd4 9.Nxd4 Bxd4 10.e3 Qa5 11.exd4 Qxg5 12.g3 d6 13.f4 Qa5 14.b4 Qc7 15.Nb5
Qc6 16.Qg2 Bd7 17.Nc3 Qc7 18.Be2 Bc6 19.d5 Bxd5 20.Nxd5 exd5 21.Rc1 a5 22.
O-O axb4 23.axb4 Ra2 24.cxd5 Qb6+ 25.Qf2 Qxb4 26.Rb1 Qa5 27.Qf3 Re8 28.Bb5
Qa7+ 29.Kh1 Re3 30.Qd1 h5 31.Rc1 Ng4 32.Rc8+ Kh7 33.Bd3+ g6 34.Rc2 Rxc2 
0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.03"]
[Round "6"]
[White "Kuijf, Marinus"]
[Black "Donner, Jan"]
[Result "0-1"]
[BlackElo "2475"]
[EventDate "1981.02.25"]
[PlyCount "108"]
[ECO "B22"]

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 e6 6.Nf3 Bb4 7.cxd5 Qxd5 8.Bd3 
O-O 9.O-O Bxc3 10.bxc3 b6 11.c4 Qd6 12.Bg5 Nbd7 13.Re1 h6 14.Bh4 Bb7 15.
Ne5 Nxe5 16.dxe5 Qc6 17.f3 Nd7 18.Be7 Rfe8 19.Bd6 Nc5 20.Bc2 Ba6 21.Qd4 
Rac8 22.Rac1 Nb7 23.Qd3 g6 24.Bb3 Red8 25.Red1 Nxd6 26.exd6 Rd7 27.Qd2 
Rcd8 28.Qxh6 Qc5+ 29.Kh1 Rxd6 30.Re1 Rd2 31.Qh4 Bb7 32.Rcd1 R8d4 33.Qg3 
Rxd1 34.Bxd1 Kg7 35.Qb8 Bc6 36.Bb3 a5 37.a3 a4 38.Ba2 e5 39.h3 f6 40.Qc7+ 
Rd7 41.Qc8 Rd2 42.Qc7+ Kf8 43.Qh7 Rxa2 44.Qh8+ Kf7 45.Qh7+ Kf8 46.Qh8+ Ke7
47.Qg7+ Kd8 48.Qxf6+ Kc8 49.Rxe5 Qxc4 50.Kh2 Kb7 51.Rg5 Qe2 52.Qf7+ Ka6 
53.Rxg6 Bxf3 54.Qc7 Qxg2+ 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.03"]
[Round "6"]
[White "Langeweg, Christian"]
[Black "Stehouwer, Coen"]
[Result "1/2-1/2"]
[WhiteElo "2455"]
[EventDate "1981.02.25"]
[PlyCount "57"]
[ECO "E15"]

1.d4 Nf6 2.Nf3 e6 3.c4 b6 4.g3 Ba6 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 c6 8.O-O d5 
9.Bc3 O-O 10.Nbd2 Nbd7 11.Re1 c5 12.e4 dxe4 13.Nxe4 Nxe4 14.Rxe4 Bb7 15.
Re3 Bf6 16.dxc5 Bxc3 17.Rxc3 Nxc5 18.b4 Qf6 19.Qd4 Qxd4 20.Nxd4 Bxg2 21.
Kxg2 Rfd8 22.Nc6 Rd6 23.Ne7+ Kf8 24.bxc5 bxc5 25.Nf5 exf5 26.Rb1 Re8 27.
Rb7 Re7 28.Rb8+ Re8 29.Rb7 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.03"]
[Round "6"]
[White "Ligterink, Gert"]
[Black "Timman, Jan"]
[Result "0-1"]
[WhiteElo "2430"]
[BlackElo "2620"]
[EventDate "1981.02.25"]
[PlyCount "52"]
[ECO "D85"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.cxd5 Nxd5 6.e4 Nxc3 7.bxc3 c5 8.Rb1 
O-O 9.Be2 Qa5 10.Qd2 b6 11.O-O Ba6 12.Bxa6 Nxa6 13.Qe2 e6 14.Bf4 Rfd8 15.
Rfd1 Qa4 16.Bg5 Re8 17.Qd2 Rac8 18.Qf4 cxd4 19.cxd4 Rc2 20.Rdc1 Nb4 21.
Rxc2 Nxc2 22.Bf6 Nxd4 23.Bxd4 Bxd4 24.Nxd4 Qxd4 25.g3 Rc8 26.Qf3 Rc2 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.03"]
[Round "6"]
[White "Van der Sterren, Paul"]
[Black "Ree, Hans"]
[Result "0-1"]
[WhiteElo "2440"]
[BlackElo "2485"]
[EventDate "1981.02.25"]
[PlyCount "80"]
[ECO "C12"]

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Bb4 5.e5 h6 6.Bd2 Bxc3 7.bxc3 Ne4 8.Qg4 g6
9.Bd3 Nxd2 10.Kxd2 c5 11.Nf3 Qc7 12.dxc5 Nd7 13.Bxg6 fxg6 14.Qxe6+ Kd8 15.
Qxg6 Re8 16.Rhe1 Nxc5 17.Re3 Qb6 18.Qg7 Be6 19.Rd1 Rg8 20.Qxh6 Rxg2 21.Ng5
Rc8 22.Kc1 Kc7 23.Rf3 Kb8 24.Rf8 Qc6 25.h4 a6 26.h5 Rxf8 27.Qxf8+ Ka7 28.
h6 Rxg5 29.h7 Rh5 30.h8=Q Rxh8 31.Qxh8 Ne4 32.Rd3 Nxc3 33.Qh4 Qc5 34.Kb2 
Ne4 35.f3 Qb6+ 36.Kc1 Nc5 37.Rd2 Qa5 38.Qd4 b6 39.Rg2 Qa3+ 40.Kb1 Na4 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.03"]
[Round "6"]
[White "Van der Wiel, John"]
[Black "Hartoch, Robert"]
[Result "1-0"]
[WhiteElo "2465"]
[BlackElo "2405"]
[EventDate "1981.02.25"]
[PlyCount "115"]
[ECO "B09"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Be2 c5 7.dxc5 Qa5 8.O-O 
Qxc5+ 9.Kh1 Bg4 10.Bd3 Nc6 11.Qe1 Bxf3 12.Rxf3 Nb4 13.Be3 Nxd3 14.cxd3 Qc6
15.Bd4 Qd7 16.Qh4 Ng4 17.Bxg7 Kxg7 18.f5 Nf6 19.Raf1 h6 20.d4 g5 21.Qh3 
Ng8 22.e5 dxe5 23.dxe5 Qd4 24.f6+ exf6 25.exf6+ Kh8 26.Rf5 Rae8 27.Rxg5 
Qxf6 28.Rgf5 Qg7 29.Qf3 Re6 30.g3 Ne7 31.Rxf7 Rxf7 32.Qxf7 Qxf7 33.Rxf7 
Kg8 34.Rf4 Re1+ 35.Kg2 Nc6 36.Rf6 Rc1 37.Rxh6 Rc2+ 38.Kh3 Rxb2 39.Re6 Rc2 
40.Re3 a6 41.a4 Rb2 42.Nd5 Kf7 43.Re4 b5 44.axb5 axb5 45.g4 Rd2 46.Rf4+ 
Kg7 47.Nc7 Ne5 48.Rf5 Ng6 49.Ne6+ Kg8 50.Nf4 Nxf4+ 51.Rxf4 Rb2 52.Rf6 Kg7 
53.Rb6 b4 54.Kg3 b3 55.h4 Rb1 56.Kf4 b2 57.Kg5 Kf7 58.h5 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.04"]
[Round "7"]
[White "Donner, Jan"]
[Black "Van der Sterren, Paul"]
[Result "1/2-1/2"]
[WhiteElo "2475"]
[BlackElo "2440"]
[EventDate "1981.02.25"]
[PlyCount "98"]
[ECO "D40"]

1.d4 d5 2.c4 e6 3.Nc3 c5 4.e3 Nf6 5.Nf3 Nc6 6.a3 a6 7.cxd5 exd5 8.dxc5 
Bxc5 9.b4 Ba7 10.b5 axb5 11.Nxb5 Bb8 12.Be2 O-O 13.O-O Ne4 14.Bb2 Re8 15.
Qc2 Bg4 16.Rfd1 Re6 17.g3 Rg6 18.Nc3 Nxc3 19.Bxc3 h5 20.e4 Bxf3 21.Bxf3 d4
22.Bxh5 Rh6 23.Be2 Qf6 24.Bd2 Rxh2 25.Rf1 d3 26.Qxd3 Rxf2 27.e5 Rxf1+ 28.
Rxf1 Qxe5 29.Kg2 Qe7 30.Bd1 Rxa3 31.Bb3 Ne5 32.Qc3 Qd7 33.Bf4 Qc6+ 34.Qxc6
bxc6 35.Bxf7+ Nxf7 36.Bxb8 Rb3 37.Bf4 Rc3 38.Rd1 g5 39.Bc7 Kg7 40.g4 Kg6 
41.Rd4 Kf6 42.Re4 c5 43.Kf1 Rc2 44.Ke1 Rb2 45.Ba5 Rb3 46.Kd2 Nd6 47.Bd8+ 
Kf7 48.Re7+ Kf8 49.Re6 Nf7 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.04"]
[Round "7"]
[White "Grooten, Herman"]
[Black "Kuijf, Marinus"]
[Result "1/2-1/2"]
[EventDate "1981.02.25"]
[PlyCount "102"]
[ECO "D14"]

1.c4 c6 2.Nc3 d5 3.cxd5 cxd5 4.d4 Nf6 5.Nf3 Nc6 6.Bf4 Bf5 7.e3 e6 8.Bb5 
Nd7 9.Qa4 Rc8 10.O-O a6 11.Bxc6 Rxc6 12.Rfc1 Be7 13.Ne2 Nb6 14.Qb3 Rc4 15.
Qd1 O-O 16.b3 Rxc1 17.Rxc1 Nd7 18.Ne5 Nxe5 19.Bxe5 Bb4 20.Rc7 Ba5 21.Rxb7 
Qa8 22.Re7 Rc8 23.Ng3 Bg6 24.h4 Bb4 25.Rc7 Rxc7 26.Bxc7 Qc6 27.Be5 f6 28.
Bf4 Qc2 29.Qg4 Bf7 30.h5 Kf8 31.h6 g5 32.Bb8 Qxa2 33.Nh5 Qb1+ 34.Kh2 Qg6 
35.Ng3 Qxh6+ 36.Kg1 Qg6 37.Qd1 Be8 38.e4 dxe4 39.d5 exd5 40.Qxd5 e3 41.
fxe3 Qf7 42.Qd4 Be7 43.b4 Qe6 44.Ne4 Bc6 45.Nc5 Qa2 46.e4 a5 47.Bd6 Ke8 
48.Bxe7 Kxe7 49.bxa5 Qxa5 50.Nd3 Qa4 51.Nb4 Qb5 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.04"]
[Round "7"]
[White "Hartoch, Robert"]
[Black "Ligterink, Gert"]
[Result "1/2-1/2"]
[WhiteElo "2405"]
[BlackElo "2430"]
[EventDate "1981.02.25"]
[PlyCount "23"]
[ECO "A36"]

1.Nf3 c5 2.g3 Nc6 3.c4 g6 4.Bg2 Bg7 5.O-O e6 6.e3 Nge7 7.Nc3 O-O 8.d4 cxd4
9.Nxd4 Nxd4 10.exd4 d5 11.cxd5 Nxd5 12.Nxd5 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.04"]
[Round "7"]
[White "Ree, Hans"]
[Black "Boersma, Paulus"]
[Result "1-0"]
[WhiteElo "2485"]
[BlackElo "2335"]
[EventDate "1981.02.25"]
[PlyCount "63"]
[ECO "D94"]

1.d4 Nf6 2.c4 c6 3.Nc3 d5 4.e3 g6 5.Nf3 Bg7 6.Be2 O-O 7.O-O Be6 8.b3 c5 9.
Ba3 dxc4 10.Bxc5 Na6 11.Ba3 Qa5 12.Bb2 cxb3 13.axb3 Qb6 14.Nd2 Nb4 15.Na4 
Qd8 16.Nc5 Bd5 17.Bc3 a5 18.Bxb4 axb4 19.Rxa8 Qxa8 20.Bf3 e6 21.Nc4 Bxc4 
22.bxc4 Qa2 23.Nb3 b6 24.Qd3 Rd8 25.Ra1 Qb2 26.Rb1 Qa3 27.g3 e5 28.Qc2 
exd4 29.Ra1 d3 30.Qb1 Ne4 31.Rxa3 Nc3 32.Ra1 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.04"]
[Round "7"]
[White "Stehouwer, Coen"]
[Black "Van der Wiel, John"]
[Result "1/2-1/2"]
[BlackElo "2465"]
[EventDate "1981.02.25"]
[PlyCount "66"]
[ECO "B15"]

1.e4 g6 2.d4 Bg7 3.Nc3 c6 4.f4 d5 5.e5 h5 6.Be3 Nh6 7.Nf3 Bg4 8.Be2 e6 9.
g3 Nf5 10.Bf2 Bf8 11.h3 Bxf3 12.Bxf3 Qa5 13.Qd3 Nd7 14.g4 hxg4 15.hxg4 
Rxh1+ 16.Bxh1 Ne7 17.O-O-O b5 18.Kb1 b4 19.Ne2 c5 20.dxc5 Nxc5 21.Bxc5 
Qxc5 22.Nd4 Nc6 23.Nxc6 Qxc6 24.f5 gxf5 25.gxf5 Rc8 26.Bf3 Qc4 27.fxe6 
fxe6 28.Qg6+ Kd7 29.b3 Qc3 30.Qf7+ Be7 31.Rxd5+ exd5 32.Bg4+ Kc6 33.Bxc8 
Qe1+ 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.04"]
[Round "7"]
[White "Timman, Jan"]
[Black "Bohm, Hans"]
[Result "1/2-1/2"]
[WhiteElo "2620"]
[BlackElo "2410"]
[EventDate "1981.02.25"]
[PlyCount "85"]
[ECO "A13"]

1.c4 e6 2.Nf3 d5 3.b3 Nf6 4.Bb2 Nbd7 5.g3 c6 6.Bg2 b5 7.d3 Qa5+ 8.Nbd2 Ba3
9.Qc1 Bxb2 10.Qxb2 bxc4 11.dxc4 c5 12.O-O O-O 13.e4 dxe4 14.Ng5 Bb7 15.
Ngxe4 Bxe4 16.Nxe4 Nxe4 17.Bxe4 Rad8 18.Rfd1 Qc7 19.Qc3 Qe5 20.Qxe5 Nxe5 
21.f4 Ng4 22.h3 Ne3 23.Re1 Nf5 24.Bxf5 exf5 25.Rad1 f6 26.Kf2 Kf7 27.Rxd8 
Rxd8 28.Ke2 a5 29.Rd1 Re8+ 30.Kf3 a4 31.Rd7+ Ke6 32.Rb7 axb3 33.axb3 h5 
34.h4 Kd6 35.Kf2 Rg8 36.Rb6+ Kc7 37.Re6 Kd7 38.Re3 Ra8 39.Ke2 Ra2+ 40.Kd3 
Kd6 41.Kc3 Kd7 42.Rd3+ Kc6 43.Rd2 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.04"]
[Round "7"]
[White "Van der Vliet, Fredrik"]
[Black "Langeweg, Christian"]
[Result "0-1"]
[WhiteElo "2395"]
[BlackElo "2455"]
[EventDate "1981.02.25"]
[PlyCount "66"]
[ECO "E01"]

1.d4 Nf6 2.c4 e6 3.g3 c5 4.Nf3 cxd4 5.Nxd4 d5 6.Bg2 e5 7.Nf3 d4 8.O-O Nc6 
9.e3 Bc5 10.exd4 exd4 11.Nbd2 O-O 12.Nb3 Qb6 13.Bf4 Re8 14.Nxc5 Qxc5 15.
Qb3 h6 16.Rfe1 Be6 17.Qxb7 Rad8 18.Ne5 Nxe5 19.Rxe5 Qxc4 20.Qc6 g5 21.Bd2 
Qd3 22.Qf3 Qg6 23.Rae1 Kg7 24.Ba5 Rd5 25.Qd1 Rxe5 26.Rxe5 Bg4 27.Qe1 Rxe5 
28.Qxe5 Qb1+ 29.Qe1 Qxb2 30.h3 Be6 31.Qe5 Qb1+ 32.Kh2 Qf5 33.Qxd4 Qxa5 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.05"]
[Round "8"]
[White "Boersma, Paulus"]
[Black "Donner, Jan"]
[Result "0-1"]
[WhiteElo "2335"]
[BlackElo "2475"]
[EventDate "1981.02.25"]
[PlyCount "100"]
[ECO "E48"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.a3 dxc4 7.Bxh7+ Nxh7 8.axb4
e5 9.Nf3 Bg4 10.h3 Bxf3 11.Qxf3 Nc6 12.O-O exd4 13.exd4 Qf6 14.Qxf6 Nxf6 
15.b5 Nxd4 16.Ra4 c6 17.bxc6 Nxc6 18.Rxc4 Rfe8 19.Rd1 Rad8 20.Rxd8 Rxd8 
21.Rc5 Rd7 22.Bg5 Ne8 23.Rd5 Rxd5 24.Nxd5 f6 25.Be3 Kf7 26.Kf1 Ke6 27.Nc3 
Nd6 28.Ke2 Nc4 29.Bc1 a6 30.Kd3 N4e5+ 31.Ke4 f5+ 32.Ke3 Na5 33.Ke2 Nb3 34.
Bf4 Nc4 35.Nd1 b5 36.Kd3 a5 37.Kc3 Nc5 38.f3 Kd5 39.Ne3+ Nxe3 40.Bxe3 b4+ 
41.Kc2 a4 42.g4 Ne6 43.Kd3 f4 44.Bd2 Nd4 45.Bxb4 Nxf3 46.Bc3 Ne5+ 47.Bxe5 
Kxe5 48.h4 f3 49.g5 Kf5 50.Ke3 Kg4 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.05"]
[Round "8"]
[White "Bohm, Hans"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[WhiteElo "2410"]
[BlackElo "2405"]
[EventDate "1981.02.25"]
[PlyCount "60"]
[ECO "E61"]

1.d4 g6 2.c4 Bg7 3.Nc3 Nf6 4.g3 O-O 5.Bg2 d6 6.e3 Nbd7 7.Nge2 e5 8.b3 Re8 
9.Ba3 exd4 10.exd4 Nf8 11.O-O Rb8 12.h3 h5 13.Qd2 Bf5 14.Rae1 Qd7 15.Kh2 
N8h7 16.Ng1 c6 17.Qf4 d5 18.cxd5 Nxd5 19.Nxd5 cxd5 20.Rxe8+ Rxe8 21.Rc1 g5
22.Qd2 Be4 23.f3 Bf5 24.g4 hxg4 25.fxg4 Be4 26.Nf3 f6 27.Ne1 Bf8 28.Bxf8 
Nxf8 29.Bxe4 Rxe4 30.Qf2 Qd6+ 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.05"]
[Round "8"]
[White "Kuijf, Marinus"]
[Black "Timman, Jan"]
[Result "1-0"]
[BlackElo "2620"]
[EventDate "1981.02.25"]
[PlyCount "83"]
[ECO "B09"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Be2 c5 7.dxc5 Qa5 8.O-O 
Qxc5+ 9.Kh1 Nbd7 10.Qe1 a6 11.Bd3 e5 12.Be3 Qc7 13.fxe5 dxe5 14.Qh4 h5 15.
Ng5 b5 16.Rf3 Bb7 17.Raf1 Qd8 18.Bc1 Nc5 19.a3 Nxd3 20.cxd3 Bc6 21.h3 a5 
22.Qf2 b4 23.Rxf6 Bxf6 24.Qxf6 Qxf6 25.Rxf6 Rfc8 26.Ne2 Bb5 27.Be3 bxa3 
28.bxa3 Bxd3 29.Ng1 Rc3 30.N1f3 Rxa3 31.Nxe5 Bxe4 32.Bc5 Ra4 33.Rxf7 Ra6 
34.Re7 Bd3 35.Re8+ Kg7 36.Re7+ Kg8 37.Rd7 Be4 38.Re7 Bd5 39.Nd7 Ra1+ 40.
Kh2 Ra2 41.Re8+ Kg7 42.Bf8+ 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.05"]
[Round "8"]
[White "Langeweg, Christian"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[WhiteElo "2455"]
[BlackElo "2485"]
[EventDate "1981.02.25"]
[PlyCount "33"]
[ECO "E04"]

1.d4 e6 2.c4 d5 3.Nf3 Nf6 4.g3 dxc4 5.Bg2 a6 6.Ne5 c5 7.Be3 Nd5 8.dxc5 Nd7
9.Nxc4 Nxe3 10.Nxe3 Bxc5 11.Nc4 O-O 12.O-O Qc7 13.Qb3 Rb8 14.Nc3 b5 15.Nd2
Bb7 16.Bxb7 Qxb7 17.a4 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.05"]
[Round "8"]
[White "Stehouwer, Coen"]
[Black "Van der Vliet, Fredrik"]
[Result "1/2-1/2"]
[BlackElo "2395"]
[EventDate "1981.02.25"]
[PlyCount "81"]
[ECO "B70"]

1.e4 c5 2.Nc3 d6 3.Nge2 Nf6 4.g3 g6 5.Bg2 Nc6 6.d4 cxd4 7.Nxd4 Bd7 8.O-O 
Bg7 9.Nde2 O-O 10.h3 Rc8 11.Be3 Qa5 12.Nd5 Rfe8 13.c3 Qa6 14.b3 Ne5 15.a4 
Bc6 16.a5 Nxd5 17.exd5 Bb5 18.c4 Nxc4 19.bxc4 Bxc4 20.Nd4 Rc5 21.Qa4 Rd8 
22.Rfc1 Bxd5 23.Bxd5 Rxd5 24.Qd7 Rf8 25.Rc8 Rxa5 26.Rxa5 Qxa5 27.Qxb7 g5 
28.Nc6 Qa1+ 29.Kg2 Bf6 30.Rc7 e6 31.Qb4 Qd1 32.Nxa7 h6 33.Nb5 Qd5+ 34.Kh2 
Rb8 35.Qxd6 Qxb5 36.Bd4 Bxd4 37.Qxd4 Qf5 38.h4 Qg6 39.Rc5 gxh4 40.Qxh4 Kh7
41.Re5 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.05"]
[Round "8"]
[White "Van der Sterren, Paul"]
[Black "Grooten, Herman"]
[Result "1-0"]
[WhiteElo "2440"]
[EventDate "1981.02.25"]
[PlyCount "53"]
[ECO "E12"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 c5 5.d5 Ba6 6.Qc2 Qe7 7.Bg5 exd5 8.Bxf6 
Qxf6 9.cxd5 g6 10.Nc3 Bg7 11.e4 Bxf1 12.e5 Qd8 13.Rxf1 O-O 14.O-O-O b5 15.
Nxb5 Qb6 16.Nc3 Na6 17.Kb1 Rab8 18.Rfe1 Qa5 19.Re4 Rfc8 20.Ra4 Qb6 21.d6 
Kh8 22.Qe2 c4 23.Rd4 f6 24.Rdxc4 Rxc4 25.Rxc4 fxe5 26.Nxe5 Qa5 27.Nxg6+ 
1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.05"]
[Round "8"]
[White "Van der Wiel, John"]
[Black "Ligterink, Gert"]
[Result "1/2-1/2"]
[WhiteElo "2465"]
[BlackElo "2430"]
[EventDate "1981.02.25"]
[PlyCount "100"]
[ECO "B64"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.O-O-O
O-O 9.f4 h6 10.Bh4 e5 11.Nf5 Bxf5 12.exf5 Qa5 13.Kb1 Rad8 14.Bxf6 Bxf6 15.
Nd5 Qxd2 16.Rxd2 exf4 17.Nxf6+ gxf6 18.Bc4 Rfe8 19.b3 Re5 20.Rhd1 b5 21.
Rxd6 Rxd6 22.Rxd6 Nb4 23.Bd3 Nxd3 24.Rxd3 Re2 25.Rd4 Rxg2 26.Rxf4 Rxh2 27.
a4 bxa4 28.Rxa4 h5 29.Rxa7 h4 30.b4 Rg2 31.Kb2 h3 32.Ra3 h2 33.Rh3 Kf8 34.
Rh6 Ke7 35.Kb3 Kd6 36.c4 Ke5 37.b5 Kd4 38.b6 Kc5 39.b7 Rg8 40.Rxh2 Rb8 41.
Kc3 Rxb7 42.Ra2 Rb1 43.Ra6 Rc1+ 44.Kd3 Rd1+ 45.Ke3 Kxc4 46.Rxf6 Kd5 47.Kf4
Rf1+ 48.Kg5 Ke4 49.Rxf7 Rg1+ 50.Kh6 Rh1+ 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.06"]
[Round "9"]
[White "Donner, Jan"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[WhiteElo "2475"]
[BlackElo "2455"]
[EventDate "1981.02.25"]
[PlyCount "67"]
[ECO "E41"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 Nc6 6.Nf3 Bxc3+ 7.bxc3 d6 8.e4 e5
9.d5 Ne7 10.Nd2 Qa5 11.Qb3 O-O 12.Qc2 Ne8 13.f3 f5 14.exf5 Bxf5 15.Ne4 
Bxe4 16.Bxe4 Nf6 17.Bd3 e4 18.fxe4 Ng6 19.O-O Ng4 20.Rf5 N4e5 21.Be2 Ne7 
22.Rg5 Rf6 23.Be3 h6 24.Rg3 Raf8 25.Rf1 Qd8 26.Rxf6 Rxf6 27.Qd2 N7g6 28.h4
Qf8 29.Bxh6 gxh6 30.h5 Kh7 31.hxg6+ Rxg6 32.Rxg6 Kxg6 33.Qe3 Qf6 34.Qh3 
1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.06"]
[Round "9"]
[White "Grooten, Herman"]
[Black "Boersma, Paulus"]
[Result "0-1"]
[BlackElo "2335"]
[EventDate "1981.02.25"]
[PlyCount "114"]
[ECO "A28"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.e3 Bb4 5.Qc2 Bxc3 6.Qxc3 Qe7 7.a3 d5 8.cxd5 
Nxd5 9.Qb3 Nb6 10.d3 a5 11.Be2 O-O 12.O-O a4 13.Qc2 Na5 14.Bd2 Nb3 15.Rad1
Bg4 16.Bc3 f6 17.Rfe1 Nd5 18.Nd2 Bxe2 19.Rxe2 Nxd2 20.Bxd2 Rfd8 21.e4 Nf4 
22.Bxf4 exf4 23.d4 c6 24.f3 Qe6 25.h3 Qb3 26.Qxb3+ axb3 27.Red2 b5 28.Rc1 
Ra4 29.d5 cxd5 30.exd5 Rc4 31.Rcd1 Rd6 32.Rd4 g5 33.Kf2 Rc5 34.Ke2 Kf7 35.
R1d3 Rc2+ 36.Rd2 Rc5 37.R4d3 Kg6 38.Rxb3 Rdxd5 39.Rxd5 Rxd5 40.Rc3 Re5+ 
41.Kd2 Kh5 42.b4 Kh4 43.Rc5 Re3 44.Rc3 Re6 45.Kd3 Rd6+ 46.Ke4 Rd2 47.Rc5 
Rxg2 48.Rxb5 Kxh3 49.a4 Kg3 50.a5 Ra2 51.Rb6 Ra4 52.a6 h5 53.Kd5 h4 54.b5 
h3 55.Rc6 Ra5 56.Kc4 h2 57.Kb4 Ra1 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.06"]
[Round "9"]
[White "Hartoch, Robert"]
[Black "Kuijf, Marinus"]
[Result "1/2-1/2"]
[WhiteElo "2405"]
[EventDate "1981.02.25"]
[PlyCount "80"]
[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 h6 10.Bh4 Bd7 11.Ndb5 d5 12.e5 Ne4 13.Bxe7 Nxd2 14.Bxd8 Nxf1 15.
Rhxf1 Raxd8 16.g3 a6 17.Nd4 f6 18.exf6 gxf6 19.Rfe1 Nxd4 20.Rxd4 Kf7 21.
Ne2 Ke7 22.f5 e5 23.Rxd5 Bxf5 24.Nc3 Ke6 25.Rc5 Rc8 26.Ne4 h5 27.Re3 h4 
28.Rxc8 Rxc8 29.Rc3 Rxc3 30.Nxc3 hxg3 31.hxg3 Bg6 32.Nd1 f5 33.Kd2 f4 34.
gxf4 exf4 35.Nf2 Ke5 36.c3 Bf7 37.b3 Bd5 38.Kd3 Bc6 39.Ke2 Bd5 40.Nd3+ Kf5
1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.06"]
[Round "9"]
[White "Ligterink, Gert"]
[Black "Bohm, Hans"]
[Result "1-0"]
[WhiteElo "2430"]
[BlackElo "2410"]
[EventDate "1981.02.25"]
[PlyCount "107"]
[ECO "A85"]

1.d4 e6 2.c4 f5 3.Nc3 Nf6 4.e3 b6 5.Bd3 Bb7 6.f3 g6 7.Nge2 Bg7 8.O-O O-O 
9.Qc2 Qe7 10.a3 d6 11.Bd2 Nbd7 12.e4 fxe4 13.Nxe4 Nxe4 14.Bxe4 Bxe4 15.
Qxe4 e5 16.Rae1 Qf7 17.d5 Nc5 18.Qe3 a5 19.b4 axb4 20.axb4 Nd7 21.Nc3 h6 
22.Nb5 Nf6 23.Ra1 Kh7 24.Ra3 Rxa3 25.Nxa3 Ng8 26.Nb5 h5 27.Qa3 Qe7 28.Re1 
Bh6 29.Qd3 Qd7 30.Bxh6 Nxh6 31.Ra1 Rf7 32.Ra7 Qd8 33.Qc3 Nf5 34.Ra1 h4 35.
Qd2 h3 36.g3 Qf6 37.Re1 g5 38.Qd3 Kg8 39.Qe4 Nh6 40.Rf1 Kg7 41.g4 Ng8 42.
Nc3 Qg6 43.Qe2 Rf4 44.Ne4 Nf6 45.Ng3 e4 46.fxe4 Nxg4 47.c5 bxc5 48.bxc5 
Ne5 49.cxd6 cxd6 50.Nh5+ Kh7 51.Nxf4 gxf4+ 52.Kh1 Qh6 53.Rg1 f3 54.Qf1 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.06"]
[Round "9"]
[White "Ree, Hans"]
[Black "Stehouwer, Coen"]
[Result "1/2-1/2"]
[WhiteElo "2485"]
[EventDate "1981.02.25"]
[PlyCount "50"]
[ECO "E13"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb4 5.Bg5 Bb7 6.e3 h6 7.Bh4 g5 8.Bg3 Ne4 
9.Qc2 d6 10.Bd3 Bxc3+ 11.bxc3 Nxg3 12.fxg3 Nd7 13.O-O Qe7 14.Be4 Bxe4 15.
Qxe4 O-O 16.Qc6 a5 17.Nd2 Rac8 18.g4 f5 19.gxf5 exf5 20.Rae1 Kg7 21.Rf3 
Rf7 22.Qb7 Rcf8 23.Qxc7 Ne5 24.Qxb6 Nxf3+ 25.gxf3 g4 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.06"]
[Round "9"]
[White "Timman, Jan"]
[Black "Van der Sterren, Paul"]
[Result "0-1"]
[WhiteElo "2620"]
[BlackElo "2440"]
[EventDate "1981.02.25"]
[PlyCount "74"]
[ECO "B09"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Bd3 Na6 7.e5 Nd7 8.Be3 Nb4 
9.Bc4 c5 10.Bxf7+ Rxf7 11.e6 Rf8 12.exd7 Qxd7 13.Qe2 Qe6 14.Kd2 b6 15.a3 
Ba6 16.Qf2 Nd5 17.Rhe1 Nxc3 18.Kxc3 cxd4+ 19.Nxd4 Qc4+ 20.Kd2 e5 21.b3 Qf7
22.Nf3 Rac8 23.Kd1 Qf5 24.Ra2 Rc3 25.Bd2 Rc7 26.Be3 Rfc8 27.Rg1 Rc3 28.Qd2
Qe4 29.Ng5 Qc6 30.Re1 h6 31.Nf3 Kh7 32.h4 e4 33.Nd4 Qd5 34.Ne2 Rd3 35.cxd3
Qxb3+ 36.Rc2 exd3 37.Nd4 Bxd4 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.06"]
[Round "9"]
[White "Van der Vliet, Fredrik"]
[Black "Van der Wiel, John"]
[Result "1/2-1/2"]
[WhiteElo "2395"]
[BlackElo "2465"]
[EventDate "1981.02.25"]
[PlyCount "45"]
[ECO "A46"]

1.d4 Nf6 2.Nf3 e6 3.g3 c5 4.Bg2 Nc6 5.O-O Qb6 6.dxc5 Bxc5 7.c4 Ne4 8.e3 f5
9.Nbd2 Nxd2 10.Qxd2 O-O 11.Ne1 Ne5 12.b3 d6 13.Bb2 a5 14.Rb1 Qc7 15.Nc2 
Bd7 16.Nd4 a4 17.Bc3 Ra6 18.h3 axb3 19.axb3 Rfa8 20.Kh2 Ra2 21.Rb2 Rxb2 
22.Qxb2 Qb6 23.Ra1 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.07"]
[Round "10"]
[White "Boersma, Paulus"]
[Black "Timman, Jan"]
[Result "0-1"]
[WhiteElo "2335"]
[BlackElo "2620"]
[EventDate "1981.02.25"]
[PlyCount "80"]
[ECO "E45"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2 Ba6 6.a3 Bxc3+ 7.Nxc3 d5 8.b3 O-O
9.Be2 Nc6 10.a4 Qd7 11.O-O Rfd8 12.Bb2 Na5 13.Nb5 c6 14.Na3 Qe7 15.Bc3 
Rab8 16.Qc2 dxc4 17.Nxc4 Nxc4 18.bxc4 c5 19.a5 b5 20.cxb5 Bxb5 21.Bxb5 
Rxb5 22.Rfb1 Rxb1+ 23.Rxb1 Nd5 24.a6 Qd6 25.Ba5 Rc8 26.Qc4 h6 27.Rb7 Ne7 
28.g3 cxd4 29.Qxd4 Qxa6 30.Rxe7 Qxa5 31.Rxa7 Rc1+ 32.Kg2 Qb5 33.Ra8+ Kh7 
34.Ra4 Qf1+ 35.Kf3 Qh1+ 36.Kf4 Qxh2 37.Qe4+ f5 38.Qxe6 Qxf2+ 39.Ke5 Qxe3+ 
40.Kxf5 Rc5+ 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.07"]
[Round "10"]
[White "Kuijf, Marinus"]
[Black "Ligterink, Gert"]
[Result "1/2-1/2"]
[BlackElo "2430"]
[EventDate "1981.02.25"]
[PlyCount "54"]
[ECO "B46"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3 Nc6 7.Nxc6 bxc6 8.e5 
Nd5 9.Nxd5 cxd5 10.Bd3 d6 11.Bf4 Be7 12.O-O O-O 13.exd6 Bxd6 14.Bxd6 Qxd6 
15.c4 Bb7 16.Re1 Rad8 17.Qc2 g6 18.cxd5 exd5 19.Rac1 d4 20.Qc5 Qb8 21.Qc7 
Qa8 22.Qg3 Bd5 23.h4 Rfe8 24.Rxe8+ Rxe8 25.h5 Be4 26.Rd1 Bxd3 27.Qxd3 Rd8 
1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.07"]
[Round "10"]
[White "Langeweg, Christian"]
[Black "Grooten, Herman"]
[Result "1-0"]
[WhiteElo "2455"]
[EventDate "1981.02.25"]
[PlyCount "63"]
[ECO "E14"]

1.d4 Nf6 2.Nf3 e6 3.c4 b6 4.e3 d5 5.Bd3 Be7 6.O-O O-O 7.Nc3 Bb7 8.Qe2 Nbd7
9.Rd1 c5 10.b3 Qc7 11.Nb5 Qb8 12.Bb2 Re8 13.cxd5 exd5 14.Bf5 a6 15.Nc3 
cxd4 16.Nxd4 Nc5 17.Rac1 Qe5 18.Bh3 Bd6 19.g3 g6 20.b4 Ncd7 21.b5 Qg5 22.
Nc6 Nc5 23.Bg2 Nce4 24.Bxe4 Nxe4 25.Nxd5 Re6 26.f4 Qh6 27.Ba1 axb5 28.Qb2 
f6 29.Qb3 Ra3 30.Nxf6+ Kf7 31.Nd8+ Ke7 32.Qxe6+ 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.07"]
[Round "10"]
[White "Stehouwer, Coen"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[BlackElo "2475"]
[EventDate "1981.02.25"]
[PlyCount "84"]
[ECO "E54"]

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 e6 6.Nf3 Bb4 7.Bd3 O-O 8.O-O 
dxc4 9.Bxc4 b6 10.Bg5 Bb7 11.Ne5 Be7 12.Re1 Nc6 13.Ba6 Qc8 14.Qf3 Na5 15.
Bxb7 Qxb7 16.Qxb7 Nxb7 17.Nc6 Bd6 18.Rac1 Rfe8 19.b4 Nd7 20.Rc2 a6 21.Rec1
f6 22.Be3 Bf8 23.d5 Nd8 24.dxe6 Rxe6 25.Nd4 Re5 26.Bf4 Re8 27.Nd5 Re4 28.
Be3 Re5 29.Nc7 Ra7 30.Nf3 Re4 31.Rd1 Re7 32.h3 Ne6 33.Nd5 Re8 34.Nxb6 Nxb6
35.Bxb6 Rb7 36.Bc5 Nxc5 37.bxc5 Rc7 38.c6 Rec8 39.Nd4 Bd6 40.Nf5 Bf8 41.
Nd4 Bd6 42.Nb3 Bf8 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.07"]
[Round "10"]
[White "Van der Sterren, Paul"]
[Black "Hartoch, Robert"]
[Result "1-0"]
[WhiteElo "2440"]
[BlackElo "2405"]
[EventDate "1981.02.25"]
[PlyCount "73"]
[ECO "B09"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Bd3 Na6 7.O-O c5 8.d5 Nc7 
9.Qe1 Bg4 10.f5 Bxf3 11.Rxf3 Nd7 12.Qh4 Bf6 13.Bg5 Bxg5 14.Qxg5 f6 15.Qh6 
g5 16.h4 gxh4 17.Rh3 Rf7 18.Ne2 Ne5 19.Nf4 Rg7 20.Qxh4 Nf7 21.a4 Ng5 22.
Re3 a6 23.Qe1 b5 24.c3 c4 25.Be2 Nf7 26.Bh5 Ne5 27.Qh4 bxa4 28.Rh3 Rb8 29.
Bg6 Nxg6 30.fxg6 hxg6 31.Ne6 Nxe6 32.Qh8+ Kf7 33.dxe6+ Kxe6 34.Qxg7 Qb6+ 
35.Kh2 Qxb2 36.Qxg6 Rb5 37.Qg4+ 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.07"]
[Round "10"]
[White "Van der Vliet, Fredrik"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[WhiteElo "2395"]
[BlackElo "2485"]
[EventDate "1981.02.25"]
[PlyCount "44"]
[ECO "D45"]

1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Nc3 c6 5.e3 Nbd7 6.Qc2 Bd6 7.e4 dxe4 8.Nxe4 
Nxe4 9.Qxe4 Bb4+ 10.Bd2 Qa5 11.Qc2 e5 12.Bxb4 Qxb4+ 13.Qd2 Qxd2+ 14.Kxd2 
exd4 15.Re1+ Kf8 16.Nxd4 Nc5 17.Re5 Ne6 18.Nxe6+ Bxe6 19.Be2 Ke7 20.Kc3 
Rhd8 21.Rd1 Rxd1 22.Bxd1 Kd6 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.07"]
[Round "10"]
[White "Van der Wiel, John"]
[Black "Bohm, Hans"]
[Result "0-1"]
[WhiteElo "2465"]
[BlackElo "2410"]
[EventDate "1981.02.25"]
[PlyCount "94"]
[ECO "B04"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Nc6 5.c4 Nb6 6.e6 fxe6 7.Bd3 e5 8.d5 Nb4 
9.Be4 Bg4 10.a3 Na6 11.Qc2 Qd7 12.Ng5 Nc5 13.Bxh7 Rxh7 14.Qg6+ Kd8 15.Nxh7
Qf5 16.Qxf5 Bxf5 17.Nxf8 Nb3 18.Be3 Nxa1 19.Nd2 Nc2+ 20.Ke2 c6 21.Ne6+ 
Bxe6 22.dxe6 Kc7 23.h4 Rf8 24.h5 Nxe3 25.fxe3 d5 26.Rc1 dxc4 27.Nxc4 Nxc4 
28.Rxc4 Rh8 29.Rg4 Rxh5 30.Rxg7 Kd6 31.Rg8 e4 32.Kd2 Kxe6 33.Rg4 Kd5 34.
Rg7 Kd6 35.Rg6+ e6 36.Rg7 Rb5 37.Kc3 a5 38.b4 axb4+ 39.axb4 Rd5 40.Rxb7 
Rd3+ 41.Kc4 Rxe3 42.b5 cxb5+ 43.Rxb5 Rd3 44.g4 Rd5 45.Rb1 Ke5 46.g5 e3 47.
g6 Ke4 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.09"]
[Round "11"]
[White "Bohm, Hans"]
[Black "Kuijf, Marinus"]
[Result "1/2-1/2"]
[WhiteElo "2410"]
[EventDate "1981.02.25"]
[PlyCount "115"]
[ECO "E39"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 O-O 6.Nf3 Na6 7.g3 Nxc5 8.Bd2 
b6 9.Bg2 Bb7 10.O-O Nfe4 11.Rfd1 Qf6 12.Rac1 Rfc8 13.a3 Bxc3 14.Bxc3 Nxc3 
15.Qxc3 Qxc3 16.Rxc3 Na4 17.Rc2 Be4 18.Rcd2 d5 19.cxd5 Bxd5 20.Ne5 Bxg2 
21.Kxg2 f6 22.Nd3 e5 23.f4 exf4 24.gxf4 Rc7 25.Kf3 Rac8 26.Nf2 Kf8 27.h4 
Nc5 28.e4 Re8 29.Rd8 Re7 30.Rxe8+ Kxe8 31.Nd3 Rc7 32.Nb4 Ne6 33.f5 Nc5 34.
Nd5 Rd7 35.h5 Kf7 36.Ke3 Rd8 37.b4 Nb7 38.Rc1 Rd7 39.Rc8 Nd6 40.Rh8 Nxf5+ 
41.Kf4 Ne7 42.Nxe7 Rxe7 43.Rc8 g6 44.hxg6+ hxg6 45.a4 g5+ 46.Kf3 Ke6 47.a5
bxa5 48.bxa5 Rd7 49.Ke3 Rb7 50.Rc6+ Ke5 51.Rc5+ Kd6 52.Rd5+ Ke6 53.Rc5 
Rb3+ 54.Kd4 Rb4+ 55.Ke3 Kd6 56.Rf5 Ke6 57.Rc5 Rb3+ 58.Kd4 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.09"]
[Round "11"]
[White "Donner, Jan"]
[Black "Van der Vliet, Fredrik"]
[Result "1-0"]
[WhiteElo "2475"]
[BlackElo "2395"]
[EventDate "1981.02.25"]
[PlyCount "77"]
[ECO "A73"]

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.e4 Bg7 8.Be2 O-O 
9.O-O Bg4 10.Bf4 Re8 11.Nd2 Bxe2 12.Qxe2 Nh5 13.Be3 Nd7 14.g4 Nhf6 15.h3 
h5 16.g5 Nh7 17.f4 Nb6 18.a4 Qd7 19.Kg2 Bxc3 20.bxc3 Nxa4 21.c4 a6 22.Qd3 
b5 23.Rfb1 b4 24.Re1 Nc3 25.e5 dxe5 26.Bxc5 e4 27.Nxe4 Qf5 28.Nf2 Rxe1 29.
Rxe1 Qxd3 30.Nxd3 a5 31.Bd4 Na2 32.c5 Nf8 33.c6 Rc8 34.Ne5 b3 35.Nd7 Nb4 
36.Re8 Rxe8 37.Nf6+ Kh8 38.Nxe8+ Kg8 39.c7 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.09"]
[Round "11"]
[White "Grooten, Herman"]
[Black "Stehouwer, Coen"]
[Result "1/2-1/2"]
[EventDate "1981.02.25"]
[PlyCount "81"]
[ECO "A17"]

1.c4 e6 2.Nc3 Nf6 3.Nf3 Bb4 4.Qc2 O-O 5.a3 Bxc3 6.Qxc3 b6 7.b3 Bb7 8.Bb2 
d6 9.e3 e5 10.Be2 Ne4 11.Qc2 Nd7 12.O-O f5 13.Ne1 Qe7 14.d4 Ng5 15.dxe5 
dxe5 16.Nd3 Rae8 17.Rad1 f4 18.Bh5 f3 19.g3 Rd8 20.h4 Qe6 21.hxg5 Qh3 22.
Ne1 Qxh5 23.c5 Ba6 24.c6 Bxf1 25.Rxd7 Rxd7 26.cxd7 Qh3 27.Bxe5 Be2 28.Qd2 
Qf1+ 29.Kh2 Qxf2+ 30.Kh1 Qf1+ 31.Kh2 Qf2+ 32.Kh1 Qf1+ 33.Kh2 f2 34.Qd5+ 
Kh8 35.Bxg7+ Kxg7 36.Qe5+ Kg8 37.Qe6+ Kg7 38.Qh6+ Kg8 39.Qe6+ Kh8 40.Qf6+ 
Kg8 41.Qe6+ 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.09"]
[Round "11"]
[White "Hartoch, Robert"]
[Black "Boersma, Paulus"]
[Result "1/2-1/2"]
[WhiteElo "2405"]
[BlackElo "2335"]
[EventDate "1981.02.25"]
[PlyCount "49"]
[ECO "A48"]

1.Nf3 Nf6 2.d4 g6 3.Bg5 Bg7 4.Nbd2 c5 5.c3 cxd4 6.cxd4 O-O 7.e3 Nc6 8.Be2 
d6 9.O-O h6 10.Bh4 Bf5 11.Qb3 Rb8 12.Rfc1 Be6 13.Qa3 Qb6 14.Nc4 Qb4 15.
Qxb4 Nxb4 16.a3 Nc6 17.b4 Rfc8 18.Nfd2 b5 19.Bxf6 Bxf6 20.Na5 Nxa5 21.bxa5
Bd7 22.Ne4 Bg7 23.Nc3 e5 24.Nd5 Kf8 25.dxe5 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.09"]
[Round "11"]
[White "Ligterink, Gert"]
[Black "Van der Sterren, Paul"]
[Result "1-0"]
[WhiteElo "2430"]
[BlackElo "2440"]
[EventDate "1981.02.25"]
[PlyCount "61"]
[ECO "B33"]

1.d4 e6 2.Nf3 c5 3.e4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.f4 a6 7.Qf3 Qb6 8.Nb3 Qc7
9.g4 b5 10.g5 Nfd7 11.Bd3 Be7 12.Be3 Nc6 13.h4 Nb4 14.O-O O-O 15.Nd4 Re8 
16.Qg3 Nc5 17.Rad1 Bb7 18.f5 e5 19.Nf3 d5 20.g6 Bf6 21.gxf7+ Kxf7 22.Ng5+ 
Kg8 23.Ne6 Nxe6 24.fxe6 Kh8 25.exd5 Nxd5 26.Nxd5 Bxd5 27.Bxh7 Kxh7 28.Rxd5
Rxe6 29.Qg4 Rae8 30.Rd2 e4 31.Rxf6 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.09"]
[Round "11"]
[White "Ree, Hans"]
[Black "Van der Wiel, John"]
[Result "1/2-1/2"]
[WhiteElo "2485"]
[BlackElo "2465"]
[EventDate "1981.02.25"]
[PlyCount "106"]
[ECO "A12"]

1.c4 Nf6 2.g3 c6 3.Nf3 d5 4.b3 Bg4 5.Bg2 Bxf3 6.Bxf3 e5 7.O-O Bd6 8.cxd5 
cxd5 9.Nc3 e4 10.Bg2 Nc6 11.d3 Be5 12.Bd2 exd3 13.exd3 O-O 14.Rc1 h6 15.
Na4 Rc8 16.Be3 b6 17.a3 b5 18.d4 Nxd4 19.Rxc8 Qxc8 20.Bxd4 Bxd4 21.Qxd4 
bxa4 22.Qxa4 Qc7 23.Qd4 Rb8 24.b4 a5 25.Rb1 axb4 26.axb4 Qb6 27.Qxb6 Rxb6 
28.Kf1 Kf8 29.Ke2 Ke7 30.Kd3 Kd6 31.Kd4 Ra6 32.Rb2 Ra1 33.Bf3 Nd7 34.Be2 
Ra3 35.f4 g6 36.Bd1 Nf8 37.Bb3 Ne6+ 38.Kc3 Ra1 39.Ra2 Rc1+ 40.Kd3 Rb1 41.
Ra6+ Ke7 42.Ra7+ Kf6 43.Kc3 Rc1+ 44.Kd3 Rb1 45.Kc2 Rh1 46.Bxd5 Rxh2+ 47.
Kc1 Rh3 48.Bxe6 Kxe6 49.Ra3 h5 50.b5 h4 51.Ra6+ Kf5 52.gxh4 Rb3 53.Ra5 
Kxf4 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.09"]
[Round "11"]
[White "Timman, Jan"]
[Black "Langeweg, Christian"]
[Result "1-0"]
[WhiteElo "2620"]
[BlackElo "2455"]
[EventDate "1981.02.25"]
[PlyCount "49"]
[ECO "E12"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.a3 d5 6.cxd5 exd5 7.g3 Be7 8.Bg2 O-O
9.O-O c5 10.Bf4 Na6 11.dxc5 bxc5 12.Ne5 Nc7 13.Qa4 Ne6 14.Rad1 Re8 15.Rd3 
Qb6 16.Nxd5 Nxd5 17.Bxd5 Bxd5 18.Rxd5 Qxb2 19.Rd2 Qc3 20.Rd7 Nd4 21.e3 
Ne2+ 22.Kg2 Nxf4+ 23.gxf4 a5 24.Rb1 Rad8 25.Rd3 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.10"]
[Round "12"]
[White "Boersma, Paulus"]
[Black "Ligterink, Gert"]
[Result "1/2-1/2"]
[WhiteElo "2335"]
[BlackElo "2430"]
[EventDate "1981.02.25"]
[PlyCount "37"]
[ECO "A24"]

1.c4 Nf6 2.g3 g6 3.Bg2 Bg7 4.Nf3 O-O 5.O-O d6 6.Nc3 Nc6 7.d3 Nh5 8.d4 e5 
9.d5 Ne7 10.e4 c5 11.Ne1 Qe8 12.Rb1 f5 13.exf5 Bxf5 14.Ne4 Qd7 15.Nd3 Nf6 
16.f3 b5 17.b3 Rab8 18.Bd2 Nc8 19.Ndf2 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.10"]
[Round "12"]
[White "Langeweg, Christian"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[WhiteElo "2455"]
[BlackElo "2405"]
[EventDate "1981.02.25"]
[PlyCount "64"]
[ECO "A43"]

1.d4 Nf6 2.Nf3 c5 3.d5 b5 4.Bg5 Bb7 5.Bxf6 exf6 6.e4 a6 7.Be2 Qb6 8.O-O 
Bd6 9.c4 b4 10.Nbd2 O-O 11.Nh4 Be5 12.Rb1 d6 13.Kh1 Bc8 14.Bg4 Nd7 15.f4 
Bd4 16.Nf5 Re8 17.Qa4 Ra7 18.Nb3 g6 19.Ng3 f5 20.Nxd4 cxd4 21.exf5 Nf6 22.
Bh3 Rae7 23.fxg6 hxg6 24.Bxc8 Rxc8 25.f5 Ng4 26.Qd1 Ne3 27.Qf3 Qd8 28.fxg6
fxg6 29.Qf6 Qf8 30.Qxd4 Rxc4 31.Qd3 Nxf1 32.Rxf1 Rh4 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.10"]
[Round "12"]
[White "Ree, Hans"]
[Black "Donner, Jan"]
[Result "1-0"]
[WhiteElo "2485"]
[BlackElo "2475"]
[EventDate "1981.02.25"]
[PlyCount "75"]
[ECO "D37"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bf4 O-O 6.e3 b6 7.Rc1 Bb7 8.cxd5 
exd5 9.Be2 c5 10.O-O Nc6 11.Ne5 Nxe5 12.Bxe5 Ne4 13.Nxe4 dxe4 14.Qa4 Bf6 
15.Bxf6 Qxf6 16.dxc5 bxc5 17.Qb5 Qb6 18.Rc2 Rac8 19.Rfc1 Rfd8 20.g3 g6 21.
b3 Rd5 22.b4 Bc6 23.Qa6 Bb7 24.Qa3 Rcd8 25.bxc5 Qf6 26.c6 Ba8 27.c7 Rf8 
28.Qxa7 Qe5 29.Rc5 Qb2 30.R5c2 Qe5 31.Qb6 h6 32.h4 Rd6 33.Qb2 Qf5 34.Rd2 
Rf6 35.Bf1 g5 36.hxg5 Qxg5 37.Rd8 h5 38.Qb4 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.10"]
[Round "12"]
[White "Stehouwer, Coen"]
[Black "Timman, Jan"]
[Result "1/2-1/2"]
[BlackElo "2620"]
[EventDate "1981.02.25"]
[PlyCount "46"]
[ECO "B80"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.g3 Be7 7.Bg2 O-O 8.O-O a6
9.b3 Qc7 10.Bb2 Rd8 11.Qe2 Bd7 12.Nd1 Nc6 13.c4 b5 14.Rc1 Qb6 15.Qd2 bxc4 
16.Rxc4 e5 17.Nxc6 Bxc6 18.Re1 d5 19.exd5 Bxd5 20.Bxd5 Rxd5 21.Qc1 Qe6 22.
Ne3 Rb5 23.Qc2 Nd5 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.10"]
[Round "12"]
[White "Van der Sterren, Paul"]
[Black "Bohm, Hans"]
[Result "1-0"]
[WhiteElo "2440"]
[BlackElo "2410"]
[EventDate "1981.02.25"]
[PlyCount "87"]
[ECO "C19"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.a4 Qa5 8.Qd2 
Nbc6 9.Nf3 Bd7 10.Be2 f6 11.exf6 gxf6 12.dxc5 O-O-O 13.O-O Nf5 14.Re1 Rhg8
15.c4 Qxd2 16.Nxd2 Ncd4 17.Bd1 Bc6 18.c3 dxc4 19.g3 Nb3 20.Nxb3 cxb3 21.
Bxb3 Bd5 22.Bxd5 exd5 23.Re6 Rgf8 24.Bf4 Kd7 25.Rae1 Rde8 26.Rxe8 Rxe8 27.
Rxe8 Kxe8 28.g4 Nh4 29.Kf1 Kd7 30.Ke2 Ng6 31.Bb8 a6 32.f4 f5 33.gxf5 Nh4 
34.f6 Ke6 35.Be5 h5 36.Kd3 Nf3 37.Ke2 Nh4 38.Ke3 Nf5+ 39.Kd3 Kf7 40.c4 
dxc4+ 41.Kxc4 Ne3+ 42.Kd4 Nf1 43.h3 Ng3 44.Kd5 1-0

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.10"]
[Round "12"]
[White "Van der Vliet, Fredrik"]
[Black "Grooten, Herman"]
[Result "0-1"]
[WhiteElo "2395"]
[EventDate "1981.02.25"]
[PlyCount "80"]
[ECO "A09"]

1.g3 e5 2.Bg2 d5 3.c4 d4 4.d3 Nf6 5.Nf3 Nc6 6.O-O Be7 7.Na3 O-O 8.Nc2 a5 
9.b3 Nd7 10.Rb1 f5 11.a3 Nc5 12.b4 axb4 13.axb4 Na4 14.Bd2 e4 15.Nfe1 Ne5 
16.Ra1 Bf6 17.c5 Kh8 18.dxe4 d3 19.exd3 Nxd3 20.Ra3 Ndb2 21.Qe2 fxe4 22.
Bxe4 Be6 23.Ne3 c6 24.N1g2 Qe8 25.Rc1 Rd8 26.Be1 Rd4 27.Bc2 Bc4 28.Qf3 Bg5
29.Nf4 Bxf4 30.gxf4 Rdxf4 31.Qh3 h6 32.Bxa4 Nd3 33.Rd1 Be6 34.Qg3 Rf3 35.
Qd6 Nf4 36.Bc2 Nh3+ 37.Kh1 Nxf2+ 38.Bxf2 Rxf2 39.Rg1 Qf7 40.Qg3 Bd5+ 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.10"]
[Round "12"]
[White "Van der Wiel, John"]
[Black "Kuijf, Marinus"]
[Result "1/2-1/2"]
[WhiteElo "2465"]
[EventDate "1981.02.25"]
[PlyCount "63"]
[ECO "B81"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.g4 h6 7.g5 hxg5 8.Bxg5 
Nc6 9.Qd2 Qb6 10.Nb3 Ne5 11.Qe2 Bd7 12.O-O-O Rc8 13.h4 Nc4 14.Rd4 Na5 15.
Be3 Qc7 16.Nb5 Bxb5 17.Qxb5+ Nc6 18.Ra4 a6 19.Qd3 d5 20.exd5 Nxd5 21.Bg2 
Nxe3 22.Qxe3 Nb4 23.c3 Qd7 24.Ra5 Qd3 25.Nd4 Rh5 26.Ra4 Rc4 27.Rd1 Qxe3+ 
28.fxe3 Nd3+ 29.Rxd3 Rxa4 30.Bxb7 Rxa2 31.Kb1 Raa5 32.Bc6+ 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.12"]
[Round "13"]
[White "Bohm, Hans"]
[Black "Boersma, Paulus"]
[Result "1/2-1/2"]
[WhiteElo "2410"]
[BlackElo "2335"]
[EventDate "1981.02.25"]
[PlyCount "86"]
[ECO "E72"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.g3 c5 6.Nge2 O-O 7.Bg2 Nc6 8.d5 Na5 
9.b3 a6 10.Bb2 Rb8 11.O-O b5 12.cxb5 axb5 13.Rc1 b4 14.Nb1 Ba6 15.Nd2 Qb6 
16.Re1 Bb5 17.Ba1 Qa6 18.Bf1 Ra8 19.Nf4 Bxf1 20.Rxf1 Nd7 21.Bxg7 Kxg7 22.
Nf3 Kg8 23.Nd3 Rfb8 24.Qd2 Nb7 25.Rc2 f6 26.h4 Nd8 27.h5 Nf8 28.Kg2 Rb5 
29.Rh1 Nf7 30.Nh4 Ra5 31.Nc1 Qb7 32.Qe2 Qd7 33.f4 e6 34.hxg6 hxg6 35.Nxg6 
Nxg6 36.Qg4 Nh8 37.dxe6 Qg7 38.f5 Ne5 39.Qxg7+ Kxg7 40.Rd1 R5a6 41.Rcd2 
Nhf7 42.exf7 Nxf7 43.Re2 Ng5 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.12"]
[Round "13"]
[White "Donner, Jan"]
[Black "Van der Wiel, John"]
[Result "1/2-1/2"]
[WhiteElo "2475"]
[BlackElo "2465"]
[EventDate "1981.02.25"]
[PlyCount "58"]
[ECO "E25"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.f3 d5 7.cxd5 Nxd5 8.dxc5
f5 9.Qc2 Qh4+ 10.g3 Qe7 11.e4 fxe4 12.fxe4 Nf6 13.Be3 Ng4 14.Qe2 Nxe3 15.
Qxe3 O-O 16.Nf3 Nd7 17.c6 bxc6 18.Bc4 Rxf3 19.Qxf3 Ne5 20.Qe2 Qc5 21.Ba2 
Qxc3+ 22.Kf2 Ba6 23.Bxe6+ Kh8 24.Qxa6 Qf3+ 25.Kg1 Qe3+ 26.Kg2 Qxe4+ 27.Kh3
Nf3 28.Bg4 Ng5+ 29.Kh4 Nf3+ 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.12"]
[Round "13"]
[White "Grooten, Herman"]
[Black "Ree, Hans"]
[Result "0-1"]
[BlackElo "2485"]
[EventDate "1981.02.25"]
[PlyCount "52"]
[ECO "E92"]

1.c4 g6 2.e4 Bg7 3.d4 d6 4.Nc3 Nf6 5.Be2 O-O 6.Nf3 e5 7.Be3 Nc6 8.d5 Ne7 
9.Nd2 Ne8 10.b4 Kh8 11.c5 f5 12.cxd6 Nxd6 13.f3 fxe4 14.fxe4 c6 15.dxc6 
Nxc6 16.Nf3 Bg4 17.O-O Bxf3 18.Bxf3 Nd4 19.Bg4 Rxf1+ 20.Kxf1 Nc4 21.Bf2 
Qg5 22.Qd3 Nd2+ 23.Ke1 Qxg4 24.Kxd2 Bh6+ 25.Ke1 Qxg2 26.Bxd4 exd4 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.12"]
[Round "13"]
[White "Hartoch, Robert"]
[Black "Stehouwer, Coen"]
[Result "1/2-1/2"]
[WhiteElo "2405"]
[EventDate "1981.02.25"]
[PlyCount "53"]
[ECO "E07"]

1.Nf3 Nf6 2.d4 e6 3.g3 d5 4.Bg2 Be7 5.O-O O-O 6.c4 Nbd7 7.b3 c6 8.Nc3 b6 
9.Bb2 Ba6 10.Nd2 b5 11.c5 e5 12.dxe5 Ng4 13.b4 Ngxe5 14.Qc2 f5 15.Rad1 Bb7
16.Nb3 Nc4 17.Nd4 Qc8 18.Bc1 Nde5 19.Bh3 g6 20.e4 dxe4 21.Nxe4 a5 22.a3 
Rd8 23.Qe2 Re8 24.Nc3 Bf6 25.Qc2 Qc7 26.Bg2 Rad8 27.Nde2 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.12"]
[Round "13"]
[White "Kuijf, Marinus"]
[Black "Van der Sterren, Paul"]
[Result "0-1"]
[BlackElo "2440"]
[EventDate "1981.02.25"]
[PlyCount "98"]
[ECO "C84"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d4 exd4 6.O-O Be7 7.Re1 b5 8.Bb3 d6
9.Bd5 Nxd5 10.exd5 Ne5 11.Nxd4 Bd7 12.b3 O-O 13.Bb2 Qc8 14.Nc3 Re8 15.h3 
Qb7 16.f4 Ng6 17.Qf3 Qb6 18.Rad1 b4 19.Ne4 Bh4 20.g3 f5 21.Ng5 Bxg5 22.
fxg5 Re5 23.Kh2 Qc5 24.Ne2 Re4 25.c4 Rae8 26.Qf1 c6 27.dxc6 Bxc6 28.Nd4 f4
29.Rxe4 Rxe4 30.Nxc6 Qxc6 31.Re1 Qe8 32.Rxe4 Qxe4 33.Qf2 f3 34.Bd4 Ne5 35.
g4 Qf4+ 36.Kh1 Qc1+ 37.Kh2 Qf4+ 38.Kh1 Kf7 39.Be3 Qe4 40.Bd2 Ke6 41.Kh2 
Nd3 42.Qe3 Qxe3 43.Bxe3 Ke5 44.h4 g6 45.Kg3 Ke4 46.Bb6 Nc5 47.Kf2 Kf4 48.
h5 Ne4+ 49.Kf1 Kg3 0-1

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.12"]
[Round "13"]
[White "Ligterink, Gert"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[BlackElo "2455"]
[EventDate "1981.02.25"]
[PlyCount "48"]
[ECO "B85"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.Be2 d6 7.O-O Nf6 8.Be3 
Be7 9.f4 O-O 10.Bf3 Qc7 11.Nxc6 bxc6 12.Na4 Rb8 13.c4 c5 14.Qe2 Bb7 15.Nc3
Nd7 16.Rad1 Rbd8 17.a3 Nb8 18.b4 cxb4 19.axb4 Rc8 20.Rc1 Qxc4 21.Qb2 Qc7 
22.Nd5 Qd8 23.Rxc8 Bxc8 24.Nxe7+ Qxe7 1/2-1/2

[Event "37th NED-ch"]
[Site "Leeuwarden NED"]
[Date "1981.03.12"]
[Round "13"]
[White "Timman, Jan"]
[Black "Van der Vliet, Fredrik"]
[Result "1-0"]
[WhiteElo "2620"]
[BlackElo "2395"]
[EventDate "1981.02.25"]
[PlyCount "53"]
[ECO "D90"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qa4+ c6 6.cxd5 Nxd5 7.e4 Nb6 8.Qc2 
Bg4 9.Ne5 Be6 10.Be3 O-O 11.Rd1 f5 12.exf5 gxf5 13.Be2 Nd5 14.Nxd5 Bxd5 
15.O-O Nd7 16.Nd3 Nf6 17.Bf4 e6 18.Be5 Rf7 19.Nf4 Bf8 20.Bc4 Qd7 21.Rd3 
Ne4 22.Re1 Re8 23.Rxe4 Bxe4 24.Rg3+ Rg7 25.Qb3 b6 26.Bxe6+ Rxe6 27.Bxg7 
1-0
