[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.18"]
[Round "1"]
[White "Boersma, Paulus"]
[Black "Bohm, Hans"]
[Result "1-0"]
[WhiteElo "2350"]
[BlackElo "2445"]
[EventDate "1977.04.18"]
[PlyCount "160"]
[ECO "A11"]

1.Nf3 d5 2.c4 c6 3.e3 Nf6 4.Nc3 Qc7 5.d4 Bg4 6.h3 Bxf3 7.Qxf3 e6 8.Bd3 
Nbd7 9.O-O Bb4 10.Bd2 O-O 11.a3 dxc4 12.Bxc4 Bd6 13.Ne4 Nxe4 14.Qxe4 Nf6 
15.Qc2 Rac8 16.Rac1 Rfd8 17.Rfd1 h6 18.Be1 Qb6 19.b4 Bb8 20.f4 Nd5 21.Qf2 
f5 22.Qf3 Kh8 23.g3 Re8 24.e4 fxe4 25.Qxe4 e5 26.fxe5 Rxe5 27.Qf3 Rce8 28.
Bf2 R5e6 29.Bxd5 cxd5 30.Qxd5 Qa6 31.Re1 Rxe1+ 32.Rxe1 Rxe1+ 33.Bxe1 Kh7 
34.Kg2 Bd6 35.Bf2 Kh8 36.b5 Qxa3 37.Qxb7 Qd3 38.Qc6 Bb4 39.g4 Qe2 40.Qc8+ 
Kh7 41.Qf5+ Kh8 42.Qe5 Qd3 43.h4 Ba5 44.Qf5 Qe2 45.g5 Qh5 46.Qf8+ Kh7 47.
Qf5+ Kh8 48.Bg3 Bb4 49.Qc8+ Kh7 50.Qf5+ Kh8 51.Qc8+ Kh7 52.Qc2+ Kh8 53.g6 
Qg4 54.Qc6 Qe2+ 55.Kh3 Qf1+ 56.Kh2 Qe2+ 57.Qg2 Qe8 58.Be5 Qd8 59.Kg1 Be7 
60.Qb7 Qe8 61.Qc6 Qd8 62.Qe6 Bf8 63.Qf5 Qe8 64.Kh2 Qd8 65.Kh3 Qe7 66.d5 
Qa3+ 67.Kg4 Qc5 68.d6 Qc4+ 69.Kh3 Qb3+ 70.Bg3 Kg8 71.d7 Be7 72.Qf7+ Qxf7 
73.gxf7+ Kxf7 74.Bc7 Ke6 75.d8=Q Bxd8 76.Bxd8 g6 77.Kg4 Kd6 78.Bf6 Kc5 79.
Bg7 h5+ 80.Kg5 Kxb5 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.18"]
[Round "1"]
[White "Donner, Jan"]
[Black "Hartoch, Robert"]
[Result "1-0"]
[WhiteElo "2470"]
[BlackElo "2405"]
[EventDate "1977.04.18"]
[PlyCount "73"]
[ECO "A65"]

1.d4 g6 2.c4 Bg7 3.Nc3 c5 4.d5 Nf6 5.e4 d6 6.Bd3 O-O 7.h3 e6 8.Nge2 exd5 
9.cxd5 b6 10.O-O Ba6 11.Bg5 Bxd3 12.Qxd3 Nbd7 13.f4 a6 14.a4 Qc7 15.Rae1 
Rfe8 16.Ng3 c4 17.Qd2 b5 18.e5 dxe5 19.f5 b4 20.Nce4 Nxe4 21.Nxe4 f6 22.
Be3 Rab8 23.h4 Rec8 24.Qe2 gxf5 25.Rxf5 c3 26.bxc3 Qc4 27.Qg4 Kh8 28.Rh5 
Nf8 29.Qf5 Qd3 30.cxb4 Rc2 31.Bc5 h6 32.Be3 Rxb4 33.Bxh6 Rxe4 34.Rxe4 Qxd5
35.Rg4 Rxg2+ 36.Rxg2 Qd1+ 37.Kh2 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.18"]
[Round "1"]
[White "Hofland, Leonard"]
[Black "Van der Vliet, Fredrik"]
[Result "0-1"]
[BlackElo "2340"]
[EventDate "1977.04.18"]
[PlyCount "122"]
[ECO "A16"]

1.c4 g6 2.Nc3 Bg7 3.g3 Nf6 4.Bg2 O-O 5.e4 d6 6.Nge2 c6 7.O-O a6 8.a4 a5 9.
d3 Na6 10.h3 Nb4 11.Na2 Nxa2 12.Rxa2 e5 13.d4 exd4 14.Nxd4 Re8 15.Re1 d5 
16.cxd5 cxd5 17.exd5 Rxe1+ 18.Qxe1 Nxd5 19.Nc2 Be6 20.Ra3 Rc8 21.Ne3 Nxe3 
22.Rxe3 Qd7 23.Bf1 Bd4 24.Re2 Bxh3 25.Bxh3 Qxh3 26.Re8+ Rxe8 27.Qxe8+ Kg7 
28.Bf4 Qe6 29.Qxe6 fxe6 30.b3 e5 31.Bd2 Bb6 32.Kg2 Kf6 33.Kf3 h5 34.Bc3 
Kf5 35.Ke2 g5 36.f3 g4 37.fxg4+ hxg4 38.Be1 Ke4 39.Bc3 Bc7 40.Bb2 Bb8 41.
Bc3 Bc7 42.Bb2 Kd5 43.Bc3 e4 44.Kf2 Bb6+ 45.Ke2 Kc6 46.Be1 Kd6 47.Bd2 Ke5 
48.Be1 Bc7 49.Bc3+ Kd5 50.Kf2 b6 51.Bb2 Be5 52.Bc1 Bd4+ 53.Ke2 Bc5 54.Bb2 
Bd6 55.Kf2 Bc7 56.Bc3 Be5 57.Bd2 Bd4+ 58.Ke2 Bc5 59.Bc1 Bd6 60.Be3 Kc6 61.
Kf2 Bc5 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.18"]
[Round "1"]
[White "Langeweg, Christian"]
[Black "Timman, Jan"]
[Result "1/2-1/2"]
[WhiteElo "2445"]
[BlackElo "2590"]
[EventDate "1977.04.18"]
[PlyCount "68"]
[ECO "E94"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 Nbd7 7.O-O e5 8.Be3 
exd4 9.Nxd4 Re8 10.f3 c6 11.Nc2 Ne5 12.Qd2 a6 13.Rad1 Be6 14.b3 Qa5 15.Na4
Qxd2 16.Rxd2 Bf8 17.Nb6 Rab8 18.Rfd1 Ned7 19.Nxd7 Nxd7 20.Bf4 f5 21.Bxd6 
Bxd6 22.Rxd6 Nf8 23.exf5 Bxf5 24.Bd3 Bxd3 25.R1xd3 Re2 26.Rd2 Rbe8 27.Kf1 
R2e5 28.Rd8 R8e7 29.Kf2 g5 30.Nd4 Kf7 31.Ne2 Ne6 32.R8d6 h5 33.Nc3 a5 34.
Ne4 Rxe4 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.18"]
[Round "1"]
[White "Ligterink, Gert"]
[Black "Kortschnoj, Viktor"]
[Result "0-1"]
[WhiteElo "2430"]
[BlackElo "2645"]
[EventDate "1977.04.18"]
[PlyCount "80"]
[ECO "C45"]

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 Qf6 6.c3 Nge7 7.g3 d5 8.Bg2 
Bxd4 9.cxd4 dxe4 10.Nc3 Bf5 11.Nxe4 Bxe4 12.Bxe4 O-O-O 13.d5 Nxd5 14.Qg4+ 
Kb8 15.O-O Ne5 16.Qe2 Nxe3 17.Qxe3 c6 18.Rac1 Rhe8 19.Qb3 Rd2 20.Rc3 Red8 
21.a4 Re2 22.Bf3 Red2 23.Bg2 R8d6 24.a5 Nd3 25.a6 b6 26.Rc2 Rxc2 27.Qxc2 
Qxb2 28.Qc4 Qf6 29.Qe4 Nc5 30.Qxh7 Nxa6 31.Re1 Nc7 32.Qc2 Ne6 33.Qa2 Qd8 
34.Qa4 b5 35.Qc2 Qd7 36.h4 Kb7 37.Bh3 Kb6 38.Rc1 Rd2 39.Qb3 Qd4 40.Qf3 Nc5
0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.18"]
[Round "1"]
[White "Van Wijgerden, Cornelis"]
[Black "Ree, Hans"]
[Result "0-1"]
[WhiteElo "2430"]
[BlackElo "2460"]
[EventDate "1977.04.18"]
[PlyCount "74"]
[ECO "C41"]

1.e4 e5 2.Nf3 d6 3.Bc4 Be7 4.d4 exd4 5.Nxd4 Nf6 6.Nc3 O-O 7.O-O c6 8.Re1 
b5 9.Bf1 b4 10.Nb1 c5 11.Nb3 Bb7 12.N1d2 Nbd7 13.a3 a5 14.axb4 axb4 15.
Rxa8 Bxa8 16.g3 Re8 17.Bg2 Bf8 18.f3 d5 19.exd5 Bxd5 20.Ne4 Bxe4 21.fxe4 
c4 22.Nd2 Qb6+ 23.Kh1 Ne5 24.Qe2 Qc7 25.Nf1 Neg4 26.Be3 Nxe3 27.Qxe3 Qe5 
28.b3 Bc5 29.Qe2 c3 30.Bf3 g6 31.Qd3 Re7 32.Ne3 Nxe4 33.Bxe4 Qxe4+ 34.Qxe4
Rxe4 35.Ng2 Rd4 36.Re2 Rd2 37.Nf4 Bd6 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.18"]
[Round "1"]
[White "Van der Sterren, Paul"]
[Black "Van Baarle, John"]
[Result "1/2-1/2"]
[WhiteElo "2375"]
[BlackElo "2325"]
[EventDate "1977.04.18"]
[PlyCount "73"]
[ECO "C84"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d4 exd4 6.O-O Be7 7.Re1 O-O 8.e5 
Ne8 9.c3 dxc3 10.Nxc3 d6 11.exd6 Nxd6 12.Nd5 Be6 13.Bxc6 bxc6 14.Nxe7+ 
Qxe7 15.Bg5 Qd7 16.Ne5 Qe8 17.Rc1 f6 18.Nxc6 fxg5 19.Nd4 Qf7 20.Nxe6 Qxf2+
21.Kh1 Rf6 22.Nxc7 Raf8 23.Nd5 R6f7 24.Ne7+ Kh8 25.h3 Nf5 26.Nxf5 Rxf5 27.
Qe2 Qb6 28.Rf1 Rxf1+ 29.Rxf1 Rxf1+ 30.Qxf1 h5 31.Qe2 Qg6 32.b3 Kh7 33.Kg1 
Kh6 34.Qd2 h4 35.b4 Qe4 36.a4 Qe5 37.Qd1 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.19"]
[Round "2"]
[White "Bohm, Hans"]
[Black "Van Wijgerden, Cornelis"]
[Result "1/2-1/2"]
[WhiteElo "2445"]
[BlackElo "2430"]
[EventDate "1977.04.18"]
[PlyCount "116"]
[ECO "A29"]

1.c4 e5 2.Nc3 Nf6 3.g3 d5 4.cxd5 Nxd5 5.Bg2 Nb6 6.Nf3 Nc6 7.O-O Be7 8.d3 
O-O 9.Be3 f5 10.Na4 f4 11.Bc5 Bg4 12.Rc1 Bd6 13.Bxd6 cxd6 14.Qb3+ Kh8 15.
Nxb6 Bxf3 16.Nxa8 Nd4 17.Bxf3 Nxb3 18.axb3 Qxa8 19.Rc7 Qd8 20.Rfc1 Qf6 21.
Rxb7 d5 22.g4 e4 23.dxe4 Qxb2 24.Rbc7 dxe4 25.Rc8 Rg8 26.Bxe4 Qxe2 27.f3 
g6 28.h4 Rxc8 29.Rxc8+ Kg7 30.Rc7+ Kf6 31.Rxh7 a5 32.h5 gxh5 33.Rh6+ Ke7 
34.Rh7+ Kd6 35.Rh6+ Ke7 36.Rh7+ Kd6 37.Rh6+ Kc5 38.Rxh5+ Kb4 39.Bd5 Kc3 
40.Rf5 Qe1+ 41.Kg2 Qg3+ 42.Kf1 Kd2 43.Re5 Qh2 44.g5 Qh1+ 45.Kf2 Qh8 46.
Re2+ Kc3 47.Be6 Qh4+ 48.Kf1 Qxg5 49.Re4 Qg3 50.Rc4+ Kb2 51.Bd5 Qh3+ 52.Ke2
Qd7 53.Rd4 Kc3 54.Rd3+ Kb4 55.Kd2 Qg7 56.Kc2 Qc7+ 57.Kd2 Qe5 58.Kc2 Qa1 
1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.19"]
[Round "2"]
[White "Hartoch, Robert"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[WhiteElo "2405"]
[BlackElo "2445"]
[EventDate "1977.04.18"]
[PlyCount "75"]
[ECO "B44"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5 d6 6.c4 Nf6 7.N5c3 Be7 8.Be2 
O-O 9.O-O b6 10.Bf4 Bb7 11.Re1 a6 12.Nd2 Ne5 13.Rc1 Ng6 14.Bg3 Qb8 15.f4 
Rd8 16.Bd3 Bf8 17.Qe2 Bc6 18.a3 Ra7 19.b4 a5 20.b5 Ba8 21.Na4 Rc7 22.Rcd1 
Rcc8 23.Rf1 Qb7 24.Rde1 Nd7 25.Nf3 Qc7 26.Kh1 Nc5 27.Nxc5 Qxc5 28.a4 Qb4 
29.Ng5 Be7 30.Qh5 Bxg5 31.Qxg5 Qxa4 32.f5 f6 33.Qe3 Ne5 34.Bxe5 dxe5 35.
Qxb6 exf5 36.exf5 Qa2 37.Be2 Kh8 38.Qe3 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.19"]
[Round "2"]
[White "Hofland, Leonard"]
[Black "Ligterink, Gert"]
[Result "1/2-1/2"]
[BlackElo "2430"]
[EventDate "1977.04.18"]
[PlyCount "57"]
[ECO "A24"]

1.c4 Nf6 2.Nc3 g6 3.g3 Bg7 4.Bg2 O-O 5.d3 d6 6.e3 e5 7.Nge2 c6 8.O-O d5 9.
cxd5 cxd5 10.Qb3 Nc6 11.Bd2 d4 12.exd4 exd4 13.Ne4 Nxe4 14.dxe4 Be6 15.
Qxb7 Bc4 16.Qxc6 Bxe2 17.Rfc1 d3 18.Rab1 Rc8 19.Qxc8 Qxc8 20.Rxc8 Rxc8 21.
Rc1 Rxc1+ 22.Bxc1 Bxb2 23.Bd2 Kg7 24.Bf1 Bxf1 25.Kxf1 Kf6 26.f3 Ke5 27.Be3
a6 28.Ke1 Bc3+ 29.Kd1 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.19"]
[Round "2"]
[White "Kortschnoj, Viktor"]
[Black "Donner, Jan"]
[Result "1-0"]
[WhiteElo "2645"]
[BlackElo "2470"]
[EventDate "1977.04.18"]
[PlyCount "101"]
[ECO "D57"]

1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6 7.Bh4 Ne4 8.Bxe7 
Qxe7 9.cxd5 Nxc3 10.bxc3 exd5 11.Qb3 Qd6 12.a4 Nc6 13.a5 b6 14.axb6 cxb6 
15.Be2 Na5 16.Qb4 Qg6 17.g3 Qe4 18.O-O Bh3 19.Rfc1 Rac8 20.Ne1 Rc7 21.Bd3 
Qe6 22.Ng2 g5 23.Re1 Qe7 24.Qb2 Rfc8 25.Rac1 Qe6 26.e4 dxe4 27.Bxe4 Qb3 
28.Qe2 Rxc3 29.Rcd1 Qe6 30.d5 Qd6 31.Qh5 Bxg2 32.Kxg2 Rd8 33.Bb1 Qf6 34.
Re4 Rc4 35.Re3 Nb7 36.Qe2 Rc7 37.Re8+ Rxe8 38.Qxe8+ Kg7 39.Qb8 Rd7 40.Qxa7
Qb2 41.Bf5 Re7 42.d6 Re2 43.Qxb7 Rxf2+ 44.Kg1 Rxf5 45.Qg2 Qf6 46.d7 Qd8 
47.Qe4 Ra5 48.Qe8 Ra8 49.Re1 b5 50.Kh1 Qa5 51.Rf1 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.19"]
[Round "2"]
[White "Timman, Jan"]
[Black "Van der Sterren, Paul"]
[Result "1-0"]
[WhiteElo "2590"]
[BlackElo "2375"]
[EventDate "1977.04.18"]
[PlyCount "63"]
[ECO "C19"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.a4 Nbc6 8.Nf3 
Qa5 9.Qd2 Bd7 10.Be2 f6 11.Ba3 fxe5 12.Bxc5 e4 13.Nh4 g5 14.Rb1 gxh4 15.
Rxb7 Ng6 16.O-O Rb8 17.Rxb8+ Nxb8 18.f3 exf3 19.Bd3 Kd8 20.Qh6 Re8 21.Qxh7
Ne7 22.Qxh4 Nc6 23.Rxf3 Qxa4 24.Bg6 Rg8 25.Bf7 Rf8 26.Qh6 Rxf7 27.Rxf7 Be8
28.Rf1 Kd7 29.Qf4 e5 30.Qg4+ Kd8 31.Qe6 exd4 32.Re1 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.19"]
[Round "2"]
[White "Van Baarle, John"]
[Black "Boersma, Paulus"]
[Result "1/2-1/2"]
[WhiteElo "2325"]
[BlackElo "2350"]
[EventDate "1977.04.18"]
[PlyCount "34"]
[ECO "B52"]

1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Nxd7 5.c4 Ngf6 6.Nc3 e6 7.d4 cxd4 8.
Nxd4 a6 9.O-O Rc8 10.Qe2 Be7 11.Be3 O-O 12.Rac1 Qa5 13.h3 Rfe8 14.b3 d5 
15.exd5 exd5 16.Nxd5 Nxd5 17.cxd5 Qxd5 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.19"]
[Round "2"]
[White "Van der Vliet, Fredrik"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[WhiteElo "2340"]
[BlackElo "2460"]
[EventDate "1977.04.18"]
[PlyCount "58"]
[ECO "E01"]

1.Nf3 d5 2.g3 c5 3.Bg2 Nc6 4.d4 e6 5.O-O cxd4 6.Nxd4 Bc5 7.Nb3 Bb6 8.c4 
Nge7 9.cxd5 Nxd5 10.Nc3 Nxc3 11.bxc3 O-O 12.Ba3 Re8 13.Qc2 e5 14.c4 Qg5 
15.Bd6 Bf5 16.Qb2 e4 17.Rad1 Qg6 18.Nc5 Bxc5 19.Bxc5 b6 20.Be3 Ne5 21.c5 
Nc4 22.Qc3 Nxe3 23.Qxe3 h5 24.cxb6 axb6 25.Rb1 Rxa2 26.Rxb6 Re6 27.Rb8+ 
Kh7 28.Rb4 Qh6 29.Qxh6+ Kxh6 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.20"]
[Round "3"]
[White "Boersma, Paulus"]
[Black "Timman, Jan"]
[Result "0-1"]
[WhiteElo "2350"]
[BlackElo "2590"]
[EventDate "1977.04.18"]
[PlyCount "84"]
[ECO "A77"]

1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 exd5 5.cxd5 d6 6.Nc3 g6 7.e4 Bg7 8.Be2 O-O 
9.O-O Re8 10.Nd2 Nbd7 11.a4 Ne5 12.Ra3 a6 13.Qc2 Bg4 14.Bxg4 Nfxg4 15.h3 
Nf6 16.a5 c4 17.f4 Ned7 18.Nxc4 Qc7 19.b3 b5 20.axb6 Nxb6 21.Be3 Nxc4 22.
bxc4 Qxc4 23.Ra4 Qc7 24.Qd3 a5 25.Rc4 Qe7 26.Ra1 Nd7 27.Bd4 Bxd4+ 28.Qxd4 
Nc5 29.Ra3 Rab8 30.e5 Qh4 31.Qf2 Qxf2+ 32.Kxf2 Rb4 33.Rxc5 dxc5 34.Ke3 Ra8
35.d6 a4 36.d7 Rd8 37.Rxa4 Rxd7 38.Ra5 Rdd4 39.Rxc5 Rxf4 40.Nd5 Rfc4 41.
Nf6+ Kg7 42.Rd5 Rc3+ 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.20"]
[Round "3"]
[White "Donner, Jan"]
[Black "Hofland, Leonard"]
[Result "1-0"]
[WhiteElo "2470"]
[EventDate "1977.04.18"]
[PlyCount "61"]
[ECO "D35"]

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 exd5 5.Bg5 c6 6.e3 Qb6 7.Qc2 Ne4 8.Bh4 
Bb4 9.Bd3 Bf5 10.Ne2 Nxc3 11.bxc3 Bxd3 12.Qxd3 Bd6 13.e4 dxe4 14.Qxe4+ Kf8
15.O-O Qc7 16.c4 Nd7 17.c5 Bxh2+ 18.Kh1 Re8 19.Qd3 Bf4 20.Qf3 g5 21.Bg3 
Re6 22.Nxf4 gxf4 23.Bxf4 Qd8 24.Rae1 Qf6 25.Qg3 Qg6 26.Qh4 Kg7 27.Re3 Rxe3
28.fxe3 Re8 29.Rf3 Kh8 30.Rg3 Qf5 31.Bh6 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.20"]
[Round "3"]
[White "Langeweg, Christian"]
[Black "Kortschnoj, Viktor"]
[Result "1/2-1/2"]
[WhiteElo "2445"]
[BlackElo "2645"]
[EventDate "1977.04.18"]
[PlyCount "80"]
[ECO "D55"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c6 5.Bg5 h6 6.Bxf6 Qxf6 7.e3 Nd7 8.Qb3 Qd8
9.Bd3 Be7 10.O-O O-O 11.Rad1 Qa5 12.Bb1 Rd8 13.Qc2 Nf8 14.Ne5 Bd7 15.e4 
dxc4 16.Nxc4 Qc7 17.e5 b5 18.Ne3 Rac8 19.Ne4 Be8 20.Nc5 Bxc5 21.Qxc5 Qb6 
22.b4 Rc7 23.Be4 Ng6 24.Qc3 Rcd7 25.Qxc6 Rxd4 26.Qxb6 axb6 27.Bxg6 fxg6 
28.a3 Rd3 29.h4 Kf7 30.Rxd3 Rxd3 31.Ra1 Ke7 32.Kf1 Rd4 33.g3 Re4 34.Rc1 
Rxe5 35.Rc7+ Bd7 36.Rb7 g5 37.hxg5 Rxg5 38.Rxb6 h5 39.Ke2 Rg6 40.Nd5+ Kf7 
1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.20"]
[Round "3"]
[White "Ligterink, Gert"]
[Black "Van der Vliet, Fredrik"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[BlackElo "2340"]
[EventDate "1977.04.18"]
[PlyCount "41"]
[ECO "B22"]

1.e4 c5 2.c3 d5 3.exd5 Qxd5 4.d4 Nf6 5.Nf3 Bg4 6.Be2 e6 7.h3 Bh5 8.Na3 
cxd4 9.Nb5 Qd8 10.Nbxd4 Be7 11.Qb3 Qc8 12.O-O O-O 13.Re1 Na6 14.Ne5 Bxe2 
15.Rxe2 Nd5 16.Bd2 Bf6 17.Rae1 Nc5 18.Qc2 Nd7 19.Ndf3 Nxe5 20.Nxe5 Rd8 21.
c4 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.20"]
[Round "3"]
[White "Ree, Hans"]
[Black "Bohm, Hans"]
[Result "1/2-1/2"]
[WhiteElo "2460"]
[BlackElo "2445"]
[EventDate "1977.04.18"]
[PlyCount "83"]
[ECO "D36"]

1.d4 e6 2.Nf3 Nf6 3.c4 d5 4.Nc3 Nbd7 5.cxd5 exd5 6.Bg5 Be7 7.e3 c6 8.Qc2 
O-O 9.Bd3 Re8 10.O-O Nf8 11.Bxf6 Bxf6 12.b4 a6 13.a4 g6 14.Nd2 Ne6 15.Nb3 
Qd6 16.b5 a5 17.Rfc1 Bd7 18.Rab1 h5 19.bxc6 bxc6 20.Ne2 Reb8 21.Nc5 Nxc5 
22.dxc5 Qf8 23.Nd4 Rxb1 24.Rxb1 Rb8 25.Rb6 Rxb6 26.cxb6 c5 27.b7 Be5 28.
Bb5 Bxb5 29.Nxb5 Qe7 30.g3 c4 31.f4 Bb8 32.Qc3 Qxb7 33.Qxa5 Kh7 34.Kf2 Qc8
35.Nc3 d4 36.exd4 Qh3 37.Kg1 Bxf4 38.gxf4 Qg4+ 39.Kh1 Qxf4 40.Kg2 Qg4+ 41.
Kf1 Qh3+ 42.Kg1 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.20"]
[Round "3"]
[White "Van Wijgerden, Cornelis"]
[Black "Van Baarle, John"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[BlackElo "2325"]
[EventDate "1977.04.18"]
[PlyCount "47"]
[ECO "C41"]

1.e4 e5 2.Nf3 d6 3.Bc4 Be7 4.d4 exd4 5.Nxd4 Nf6 6.Nc3 O-O 7.O-O c6 8.a4 a5
9.Re1 Na6 10.Bf4 Nb4 11.Qd2 Re8 12.Rad1 Bg4 13.f3 Bd7 14.Nb3 Qb6+ 15.Be3 
Qc7 16.Qf2 d5 17.Bb6 Qc8 18.Bd3 Nxd3 19.Rxd3 dxe4 20.fxe4 Ng4 21.Qf4 Bf6 
22.Bd4 Be5 23.Bxe5 Nxe5 24.Rg3 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.20"]
[Round "3"]
[White "Van der Sterren, Paul"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[WhiteElo "2375"]
[BlackElo "2405"]
[EventDate "1977.04.18"]
[PlyCount "95"]
[ECO "B07"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Bg5 c6 5.Qd2 Bg7 6.f4 O-O 7.Bd3 b5 8.Nf3 Bg4 
9.O-O Nbd7 10.e5 Ne8 11.exd6 Nxd6 12.Ne5 Nxe5 13.fxe5 Nc4 14.Bxc4 bxc4 15.
Na4 f6 16.exf6 exf6 17.Be3 Re8 18.c3 Qd5 19.Rae1 g5 20.Nc5 Re7 21.Bf2 Rae8
22.Rxe7 Rxe7 23.Re1 Bf8 24.h3 Bh5 25.Rxe7 Bxe7 26.Qe1 Kf7 27.Qe4 Qxe4 28.
Nxe4 f5 29.Nd2 Be2 30.d5 cxd5 31.Bxa7 g4 32.Kf2 Bd1 33.hxg4 fxg4 34.Nf1 
Bh4+ 35.g3 Bg5 36.Ne3 Bf3 37.Bb6 Ke6 38.a4 Kd7 39.a5 Kc6 40.Nf5 Be4 41.
Nd4+ Kb7 42.b4 cxb3 43.Nxb3 Bb1 44.Nc5+ Kc6 45.Ne6 Be7 46.Be3 Bd3 47.Bg5 
Bd6 48.Bf4 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.22"]
[Round "4"]
[White "Hartoch, Robert"]
[Black "Boersma, Paulus"]
[Result "1/2-1/2"]
[WhiteElo "2405"]
[BlackElo "2350"]
[EventDate "1977.04.18"]
[PlyCount "60"]
[ECO "B59"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 e5 7.Nb3 Be7 8.O-O 
O-O 9.f4 a5 10.f5 a4 11.Nd2 Nd4 12.Nf3 Nxe2+ 13.Qxe2 h6 14.a3 Bd7 15.Be3 
Bc6 16.Bf2 b5 17.Ne1 d5 18.Nd3 Bd6 19.exd5 Nxd5 20.Nxd5 Bxd5 21.Qg4 Qg5 
22.Qxg5 hxg5 23.Rfe1 f6 24.Rad1 Bb7 25.Bc5 Rfd8 26.Bxd6 Rxd6 27.Nc5 Rxd1 
28.Rxd1 Bc6 29.Rd3 Rc8 30.Rc3 Rd8 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.22"]
[Round "4"]
[White "Hofland, Leonard"]
[Black "Langeweg, Christian"]
[Result "0-1"]
[BlackElo "2445"]
[EventDate "1977.04.18"]
[PlyCount "80"]
[ECO "A34"]

1.c4 Nf6 2.Nc3 c5 3.g3 d5 4.cxd5 Nxd5 5.Bg2 Nc7 6.d3 e5 7.Nf3 Nc6 8.O-O 
Be7 9.Be3 Bd7 10.a3 O-O 11.Rb1 a5 12.Qc1 Rc8 13.Ne1 Ne6 14.b3 b6 15.Qb2 
Re8 16.Nd5 Ned4 17.Bxd4 exd4 18.Nf3 Bf8 19.e4 dxe3 20.fxe3 Ne7 21.Nxe7+ 
Qxe7 22.Rfe1 Rcd8 23.Rbd1 Bg4 24.a4 g6 25.h3 Bg7 26.Qc2 Bc8 27.Qc4 Bh6 28.
e4 Bg7 29.Rf1 Be6 30.Qc2 h5 31.Kh2 Rd6 32.h4 Red8 33.Ng5 Bf6 34.Nxe6 Qxe6 
35.Rf3 Be5 36.Qc4 Qxc4 37.bxc4 Rd4 38.Rdf1 Rxd3 39.Rxf7 Rxg3 40.Kh1 Rg4 
0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.22"]
[Round "4"]
[White "Kortschnoj, Viktor"]
[Black "Van der Sterren, Paul"]
[Result "1-0"]
[WhiteElo "2645"]
[BlackElo "2375"]
[EventDate "1977.04.18"]
[PlyCount "118"]
[ECO "B36"]

1.c4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.e4 Nf6 6.Nc3 d6 7.Nb3 Bg7 8.f3 Be6
9.Be3 O-O 10.Nd5 Nd7 11.Qd2 a5 12.Rc1 a4 13.Nd4 Bxd5 14.exd5 Nxd4 15.Bxd4 
Bxd4 16.Qxd4 e6 17.dxe6 Re8 18.Kf2 Rxe6 19.Bd3 Nc5 20.Rhd1 Qg5 21.Bf1 Rae8
22.Rb1 h5 23.b4 axb3 24.axb3 Nd7 25.h4 Qe7 26.Kg1 Ne5 27.Qf2 Nc6 28.b4 Qf6
29.c5 dxc5 30.bxc5 R8e7 31.Bc4 Re5 32.Rd6 Qf5 33.Bd3 Re1+ 34.Kh2 Qf4+ 35.
g3 Qe3 36.Qxe1 Qxe1 37.Rxe1 Rxe1 38.Be4 Rc1 39.Bxc6 bxc6 40.Rxc6 Rc2+ 41.
Kg1 Kf8 42.Rc7 Kg7 43.Rc6 Kf8 44.Kf1 Ke7 45.Rc7+ Ke6 46.Ke1 Rg2 47.c6 Rxg3
48.Rxf7 Rg2 49.Kd1 Ra2 50.c7 Ra8 51.Rh7 Kd6 52.Kd2 Kc6 53.Ke3 Ra3+ 54.Kf4 
Kb7 55.Kg5 Rxf3 56.Kxg6 Rc3 57.Kxh5 Rc5+ 58.Kg6 Rc6+ 59.Kf5 Rc5+ 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.22"]
[Round "4"]
[White "Ligterink, Gert"]
[Black "Donner, Jan"]
[Result "1-0"]
[WhiteElo "2430"]
[BlackElo "2470"]
[EventDate "1977.04.18"]
[PlyCount "88"]
[ECO "D42"]

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 e6 6.Nf3 Be7 7.cxd5 Nxd5 8.Bd3 
O-O 9.O-O Nc6 10.Re1 Nf6 11.a3 a6 12.Bc2 b5 13.Qd3 Bb7 14.d5 exd5 15.Bg5 
g6 16.Rxe7 Qxe7 17.Nxd5 Nxd5 18.Bxe7 Ncxe7 19.Qd4 Rad8 20.Re1 Nc6 21.Qh4 
Kg7 22.h3 Nf6 23.Qg5 Rd5 24.Qf4 Rfd8 25.Bb3 Rd3 26.Ba2 h6 27.Kh2 R3d6 28.
Ne5 Nxe5 29.Qxe5 R8d7 30.Rc1 Bd5 31.Bxd5 Rxd5 32.Qb8 Rd2 33.Rc8 Rxf2 34.
Rh8 Nd5 35.Qf8+ Kf6 36.Qxh6 Rf5 37.Qh4+ Ke6 38.Ra8 Nc7 39.Qe4+ Re5 40.Qc6+
Ke7 41.Ra7 Re6 42.Qc5+ Kd8 43.Rb7 Kc8 44.Qa7 Kd8 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.22"]
[Round "4"]
[White "Timman, Jan"]
[Black "Van Wijgerden, Cornelis"]
[Result "1-0"]
[WhiteElo "2590"]
[BlackElo "2430"]
[EventDate "1977.04.18"]
[PlyCount "125"]
[ECO "B08"]

1.e4 g6 2.d4 Bg7 3.Nf3 d6 4.Be2 Nf6 5.Nc3 O-O 6.O-O c6 7.a4 Qc7 8.Bf4 Bg4 
9.e5 Nh5 10.exd6 exd6 11.Be3 d5 12.h3 Bxf3 13.Bxf3 Nf4 14.g3 Ne6 15.Qd3 
Nd7 16.Ne2 Rfe8 17.Bg2 f5 18.a5 Nf6 19.c4 Rad8 20.a6 b6 21.Rfc1 Qd7 22.Rc2
Kh8 23.Qb3 c5 24.cxd5 Nxd5 25.Bxd5 Qxd5 26.Qxd5 Rxd5 27.dxc5 Nxc5 28.Nf4 
Rd7 29.Ra3 Bd4 30.b4 Bxe3 31.fxe3 Ne4 32.Rd3 Rxd3 33.Nxd3 Nd6 34.Kf2 Nb5 
35.Nf4 Kg8 36.g4 Kf7 37.gxf5 gxf5 38.Rc6 Rd8 39.Rh6 Rd2+ 40.Kf3 Kg7 41.Re6
Kf7 42.Rh6 Kg7 43.Rc6 Ra2 44.Ne6+ Kg8 45.Kf4 Rxa6 46.Kxf5 Kf7 47.Nc7 Nxc7 
48.Rxc7+ Kg8 49.b5 Ra5 50.Kf6 h5 51.Rg7+ Kf8 52.Rh7 Kg8 53.Rxh5 a6 54.Rg5+
Kf8 55.Rd5 Kg8 56.e4 axb5 57.e5 Ra3 58.Rd8+ Kh7 59.e6 Rf3+ 60.Ke5 Re3+ 61.
Kd6 Rd3+ 62.Kc7 Re3 63.Rd7+ 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.22"]
[Round "4"]
[White "Van Baarle, John"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[WhiteElo "2325"]
[BlackElo "2460"]
[EventDate "1977.04.18"]
[PlyCount "82"]
[ECO "B85"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Be2 a6 7.f4 Be7 8.Be3 O-O
9.Bf3 Nc6 10.O-O Qc7 11.Qe2 Nxd4 12.Bxd4 e5 13.fxe5 dxe5 14.Be3 Be6 15.Qf2
b5 16.a3 Rac8 17.Rfd1 Qb7 18.Kh1 Bxa3 19.Rxa3 b4 20.Ra5 bxc3 21.bxc3 Nd7 
22.Qd2 Rc6 23.Be2 h6 24.Bd3 Rfc8 25.Qe2 Bc4 26.Bd2 Qc7 27.Rda1 Nf6 28.h3 
Rc5 29.R5a3 Qb7 30.Be1 Qb2 31.Qf3 R5c6 32.Ra5 Rc5 33.R5a3 Rd8 34.Kh2 Nh7 
35.Qe3 Rc6 36.Ra5 Bxd3 37.cxd3 Rg6 38.Bg3 Ng5 39.c4 Qc2 40.R5a3 Rgd6 41.
R1a2 Qb1 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.22"]
[Round "4"]
[White "Van der Vliet, Fredrik"]
[Black "Bohm, Hans"]
[Result "1-0"]
[WhiteElo "2340"]
[BlackElo "2445"]
[EventDate "1977.04.18"]
[PlyCount "81"]
[ECO "A42"]

1.Nf3 g6 2.d4 Bg7 3.c4 d6 4.g3 Nd7 5.Bg2 e5 6.Nc3 Ne7 7.O-O O-O 8.e4 exd4 
9.Nxd4 Ne5 10.b3 Bg4 11.f3 Bd7 12.Be3 f5 13.exf5 Nxf5 14.Nxf5 Bxf5 15.Qd2 
c6 16.f4 Nf7 17.h3 Qf6 18.Rac1 h5 19.Ne4 Qe6 20.Nf2 Rfe8 21.Rfe1 Qf6 22.
Re2 a6 23.Bf3 Bd7 24.Kg2 Nh6 25.g4 hxg4 26.hxg4 Nf7 27.g5 Qd8 28.Rce1 Bf5 
29.Bd4 Rxe2 30.Rxe2 Qf8 31.Bg4 Re8 32.Rxe8 Qxe8 33.Bxf5 gxf5 34.Bxg7 Kxg7 
35.Qd4+ Kg8 36.Qf6 Qd7 37.Qg6+ Kh8 38.Qf6+ Kg8 39.Nh1 d5 40.Ng3 dxc4 41.
Nxf5 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.23"]
[Round "5"]
[White "Boersma, Paulus"]
[Black "Kortschnoj, Viktor"]
[Result "0-1"]
[WhiteElo "2350"]
[BlackElo "2645"]
[EventDate "1977.04.18"]
[PlyCount "120"]
[ECO "C00"]

1.e4 e6 2.Nf3 d5 3.e5 c5 4.b4 d4 5.bxc5 Bxc5 6.Ba3 Qa5 7.Bxc5 Qxc5 8.c3 
Nc6 9.cxd4 Nxd4 10.Qa4+ Nc6 11.Nc3 Qa5 12.Qxa5 Nxa5 13.Nb5 Ke7 14.Nc7 Rb8 
15.d4 Nc6 16.Bc4 Nh6 17.g4 Nxg4 18.Rg1 h5 19.h3 Nh6 20.O-O-O Kf8 21.Nh4 
Ne7 22.Kb2 Nhf5 23.Nxf5 Nxf5 24.d5 exd5 25.Bxd5 Ne7 26.e6 Rh6 27.Rge1 fxe6
28.Bxe6 Nc6 29.Bd7 Bxd7 30.Rxd7 Kg8 31.Rg1 g6 32.Ne6 Ne5 33.Rg7+ Kh8 34.
Re7 Rh7 35.Rxh7+ Kxh7 36.f4 Nc4+ 37.Kc3 b5 38.Rd1 Rb7 39.Kb4 a6 40.Kc5 Re7
41.Ng5+ Kg7 42.Rd8 Rc7+ 43.Kd5 Nb6+ 44.Kd6 Rc8 45.Rxc8 Nxc8+ 46.Kc7 Ne7 
47.Kb6 Kf6 48.Kxa6 b4 49.Kb5 Kf5 50.Kxb4 Kxf4 51.Ne6+ Kg3 52.a4 Kxh3 53.
Kc5 Kg4 54.a5 h4 55.a6 Nc8 56.Kc6 h3 57.Kc7 Na7 58.Kb6 h2 59.Kxa7 h1=Q 60.
Nc7 Qc6 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.23"]
[Round "5"]
[White "Bohm, Hans"]
[Black "Van Baarle, John"]
[Result "0-1"]
[WhiteElo "2445"]
[BlackElo "2325"]
[EventDate "1977.04.18"]
[PlyCount "78"]
[ECO "A45"]

1.d4 Nf6 2.c3 d6 3.Bg5 Nbd7 4.Nd2 e5 5.e3 Be7 6.Bd3 O-O 7.Ne2 Re8 8.O-O c6
9.a4 d5 10.a5 Bd6 11.Ng3 a6 12.f4 e4 13.Be2 h6 14.Bh4 Qc7 15.b4 Nh7 16.Nh1
f5 17.Bh5 Re6 18.g4 fxg4 19.Bxg4 Re8 20.Ng3 Ndf6 21.Bxc8 Qxc8 22.f5 Rf8 
23.Rf2 Qc7 24.Ndf1 Rf7 25.Raa2 Raf8 26.Rg2 Kh8 27.Raf2 Qd7 28.Nd2 Ng8 29.
Qg4 g5 30.Ngxe4 dxe4 31.Bg3 Bxg3 32.hxg3 Nhf6 33.Qe2 h5 34.Rh2 Rh7 35.Nc4 
Ng4 36.Qc2 Nxf2 37.Rxf2 Rxf5 38.Ne5 Rxe5 39.dxe5 Qg4 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.23"]
[Round "5"]
[White "Donner, Jan"]
[Black "Van der Vliet, Fredrik"]
[Result "1-0"]
[WhiteElo "2470"]
[BlackElo "2340"]
[EventDate "1977.04.18"]
[PlyCount "153"]
[ECO "E54"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 c5 6.Nf3 d5 7.O-O cxd4 8.exd4 
dxc4 9.Bxc4 b6 10.Bg5 Bb7 11.Rc1 Be7 12.Qe2 Nc6 13.Rfd1 Nb4 14.Ne5 Nbd5 
15.Bd3 Rc8 16.Bb1 Nxc3 17.bxc3 Qd5 18.f3 Qd8 19.Bd3 Nd5 20.Bd2 Bg5 21.Be4 
Bxd2 22.Qxd2 Qe7 23.c4 Nf6 24.Bc2 Rfd8 25.Bb3 Ne8 26.Qe3 Nd6 27.g4 Ne8 28.
Rc2 Nf6 29.Rcd2 Nd7 30.Nd3 Qd6 31.Kg2 Nf8 32.Nf4 Re8 33.h4 e5 34.dxe5 Rxe5
35.Rxd6 Rxe3 36.Nd5 Bxd5 37.cxd5 Ree8 38.Rc6 Nd7 39.Rdc1 Nc5 40.Bc4 Kf8 
41.g5 g6 42.Rd1 Red8 43.Kg3 Rb8 44.d6 Nb7 45.Bf1 Nc5 46.Rc7 Nb7 47.d7 a5 
48.Bh3 Nc5 49.Kf4 Ke7 50.Ke5 Na6 51.Rc8 Nc5 52.f4 Rb7 53.Rxd8 Kxd8 54.Rd6 
Nxd7+ 55.Kd5 Ke7 56.Kc6 Nc5 57.f5 gxf5 58.Bxf5 Rb8 59.Rh6 Na6 60.a4 Nb4+ 
61.Kb5 Nd5 62.Rxh7 Rf8 63.Bc2 Rc8 64.Bb3 Rc5+ 65.Ka6 Kf8 66.h5 Nb4+ 67.
Kxb6 Rxg5 68.Bxf7 Nd5+ 69.Bxd5 Rxd5 70.h6 Kg8 71.Rg7+ Kh8 72.Rc7 Rh5 73.
Rc5 Rxh6+ 74.Kxa5 Kg7 75.Kb5 Kf7 76.a5 Rh1 77.a6 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.23"]
[Round "5"]
[White "Langeweg, Christian"]
[Black "Ligterink, Gert"]
[Result "1/2-1/2"]
[WhiteElo "2445"]
[BlackElo "2430"]
[EventDate "1977.04.18"]
[PlyCount "25"]
[ECO "E19"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Be7 6.O-O O-O 7.Nc3 Ne4 8.Qc2 
Nxc3 9.Qxc3 c5 10.Rd1 d6 11.Bf4 Nd7 12.dxc5 Nxc5 13.Ne1 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.23"]
[Round "5"]
[White "Ree, Hans"]
[Black "Timman, Jan"]
[Result "1/2-1/2"]
[WhiteElo "2460"]
[BlackElo "2590"]
[EventDate "1977.04.18"]
[PlyCount "102"]
[ECO "A41"]

1.d4 d6 2.Nf3 g6 3.c4 Bg7 4.Nc3 e5 5.dxe5 dxe5 6.Qxd8+ Kxd8 7.Be3 Be6 8.
O-O-O+ Kc8 9.b3 h6 10.h3 f5 11.g4 Nd7 12.gxf5 gxf5 13.Rg1 Bf6 14.Nd5 Bxd5 
15.cxd5 a5 16.a4 f4 17.Bd2 Ne7 18.Bc3 e4 19.Bxf6 Nxf6 20.Nd2 e3 21.fxe3 
fxe3 22.Nc4 Nexd5 23.Rg3 Re8 24.Rf3 Ra6 25.Rd3 Rc6 26.Kb2 b6 27.Nxe3 Nb4 
28.Rd4 Ne4 29.Nc4 Ng5 30.Rf5 Ne6 31.Re4 Rg8 32.h4 Nc5 33.Rd4 Kb8 34.Rf3 
Re6 35.Rdf4 Rge8 36.Rf8 Nd7 37.Rxe8+ Rxe8 38.e3 Nd5 39.Bg2 Rg8 40.Rf2 Nb4 
41.Kc3 Nc5 42.Ne5 Ka7 43.Nc6+ Nxc6 44.Bxc6 Rg6 45.Bd5 c6 46.Rf7+ Ka6 47.
Bf3 Re6 48.Kc4 Ne4 49.Kd3 Nc5+ 50.Kc4 Ne4 51.Kd3 Nc5+ 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.23"]
[Round "5"]
[White "Van Wijgerden, Cornelis"]
[Black "Hartoch, Robert"]
[Result "0-1"]
[WhiteElo "2430"]
[BlackElo "2405"]
[EventDate "1977.04.18"]
[PlyCount "87"]
[ECO "B07"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.g3 Bg7 5.Bg2 O-O 6.Nge2 c6 7.O-O e5 8.a4 a5 9.
h3 Qe7 10.b3 Na6 11.Ba3 Nb4 12.Qd2 b6 13.Rad1 Bb7 14.Rfe1 Rad8 15.d5 c5 
16.Nb5 Bc8 17.Nc1 Nh5 18.c3 Na6 19.Qe2 Bh6 20.Nd3 f5 21.exf5 Bxf5 22.Nb2 
Nc7 23.Na7 Qd7 24.Nc6 Rde8 25.Kh2 Nf4 26.gxf4 Bxf4+ 27.Kg1 Bxh3 28.Rd3 Bg4
29.f3 e4 30.fxg4 exd3 31.Ne7+ Kg7 32.Nxd3 Bg5 33.c4 Rxe7 34.Bb2+ Kg8 35.
Qd1 Rxe1+ 36.Nxe1 Qe7 37.Nf3 Qe3+ 38.Kh1 Bf4 39.Qc2 Ne8 40.Ba1 Nf6 41.Qb2 
Qc1+ 42.Qxc1 Bxc1 43.Bh3 Ne4 44.g5 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.23"]
[Round "5"]
[White "Van der Sterren, Paul"]
[Black "Hofland, Leonard"]
[Result "1-0"]
[WhiteElo "2375"]
[EventDate "1977.04.18"]
[PlyCount "58"]
[ECO "B04"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 g6 5.Bc4 Nb6 6.Bb3 Bg7 7.Ng5 d5 8.f4 O-O 
9.O-O f6 10.Nf3 Nc6 11.c3 Bf5 12.Nh4 fxe5 13.Nxf5 Rxf5 14.fxe5 Rxf1+ 15.
Qxf1 Na5 16.Bc2 c5 17.Nd2 cxd4 18.cxd4 Rc8 19.Bd1 Bh6 20.Bg4 Rxc1 21.Rxc1 
Bxd2 22.Be6+ Kh8 23.Rd1 Bh6 24.Rd3 Nc6 25.Qf2 Nc4 26.b3 Na3 27.Rh3 Bg7 28.
Qf7 Qf8 29.Qxg6 Bh6 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.25"]
[Round "6"]
[White "Donner, Jan"]
[Black "Langeweg, Christian"]
[Result "1-0"]
[WhiteElo "2470"]
[BlackElo "2445"]
[EventDate "1977.04.18"]
[PlyCount "85"]
[ECO "E04"]

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 Nbd7 6.O-O Rb8 7.Qc2 b5 8.b3 Bb7
9.bxc4 Be4 10.Qd1 bxc4 11.Nbd2 Bd5 12.Qc2 c3 13.Qxc3 c5 14.dxc5 Bxc5 15.
Nb3 Bxb3 16.axb3 Qb6 17.Bf4 Rc8 18.Qd3 Nd5 19.Bd2 O-O 20.Ng5 N5f6 21.b4 
Bxb4 22.Bxb4 Qxb4 23.Nxh7 Nxh7 24.Qxd7 Rc2 25.e3 a5 26.Ra4 Qc3 27.Qa7 Rd8 
28.Qxa5 Qxa5 29.Rxa5 Rdd2 30.Ra8+ Nf8 31.h4 g6 32.Be4 Rb2 33.g4 Kg7 34.Kg2
e5 35.Ra7 Nd7 36.Bc6 Nf6 37.Kg3 Rdc2 38.Bf3 e4 39.Bd1 Rd2 40.g5 Nd5 41.Bg4
Kf8 42.Rd7 Ke8 43.Rc1 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.25"]
[Round "6"]
[White "Hartoch, Robert"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[WhiteElo "2405"]
[BlackElo "2460"]
[EventDate "1977.04.18"]
[PlyCount "30"]
[ECO "A30"]

1.Nf3 Nf6 2.g3 b6 3.Bg2 Bb7 4.O-O c5 5.c4 g6 6.b3 Bg7 7.Bb2 O-O 8.d3 Nc6 
9.e4 d6 10.Na3 e5 11.Nc2 a6 12.a3 b5 13.cxb5 axb5 14.b4 cxb4 15.axb4 Rxa1 
1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.25"]
[Round "6"]
[White "Hofland, Leonard"]
[Black "Boersma, Paulus"]
[Result "1/2-1/2"]
[BlackElo "2350"]
[EventDate "1977.04.18"]
[PlyCount "31"]
[ECO "A21"]

1.c4 g6 2.Nc3 Bg7 3.g3 e5 4.Bg2 d6 5.d3 Ne7 6.e4 Nd7 7.Nge2 Nc6 8.Rb1 Nc5 
9.b4 Ne6 10.O-O O-O 11.b5 Ncd4 12.Nxd4 Nxd4 13.Ne2 Nxe2+ 14.Qxe2 a6 15.a4 
axb5 16.axb5 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.25"]
[Round "6"]
[White "Kortschnoj, Viktor"]
[Black "Van Wijgerden, Cornelis"]
[Result "1-0"]
[WhiteElo "2645"]
[BlackElo "2430"]
[EventDate "1977.04.18"]
[PlyCount "81"]
[ECO "A75"]

1.d4 g6 2.e4 Bg7 3.c4 c5 4.d5 d6 5.Nc3 Nf6 6.Nf3 O-O 7.Be2 e6 8.O-O exd5 
9.cxd5 a6 10.a4 Bg4 11.Nd2 Bxe2 12.Qxe2 Nbd7 13.a5 Qc7 14.Nc4 b5 15.axb6 
Nxb6 16.Na5 Rfe8 17.Qc2 Nfd7 18.Be3 Ne5 19.Bf4 Nbd7 20.Ra4 Rab8 21.Qe2 Rb4
22.Rfa1 Qb6 23.Bc1 Nb8 24.Kh1 Qc7 25.Bf4 Qb6 26.Bxe5 Bxe5 27.Nc4 Qb7 28.
Rxb4 cxb4 29.Nd1 Nd7 30.Nde3 h5 31.g3 Qb8 32.Nxe5 Rxe5 33.Qxa6 Rxe4 34.Nc4
Rd4 35.Qc6 Kg7 36.Ra8 Qxa8 37.Qxa8 Rxc4 38.Qa6 Rd4 39.Qxd6 Nf6 40.Kg2 b3 
41.Qb6 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.25"]
[Round "6"]
[White "Ligterink, Gert"]
[Black "Van der Sterren, Paul"]
[Result "1-0"]
[WhiteElo "2430"]
[BlackElo "2375"]
[EventDate "1977.04.18"]
[PlyCount "101"]
[ECO "C09"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.Ngf3 Nc6 5.exd5 exd5 6.Bb5 Bd6 7.dxc5 Bxc5 8.
O-O Ne7 9.Nb3 Bd6 10.Bg5 O-O 11.Re1 f6 12.Bh4 Ne5 13.Nxe5 Bxe5 14.c3 Qd6 
15.Bg3 Nf5 16.Nd4 Nxg3 17.hxg3 Qb6 18.Qb3 Rd8 19.Rad1 Bg4 20.Be2 Bxe2 21.
Rxe2 Qxb3 22.Nxb3 a5 23.a4 b5 24.axb5 a4 25.Nd4 Rdb8 26.Nf5 Rxb5 27.f4 Bc7
28.Rxd5 Rxd5 29.Ne7+ Kf7 30.Nxd5 Bd6 31.Kf2 Bc5+ 32.Kf3 Rd8 33.Ne3 a3 34.
bxa3 Rd3 35.c4 f5 36.g4 fxg4+ 37.Ke4 Rd4+ 38.Ke5 Rd8 39.Ke4 Rd4+ 40.Kf5 h5
41.Rb2 Bxa3 42.Rb7+ Kg8 43.Kg6 Bf8 44.f5 Re4 45.Nd5 g3 46.Kxh5 Rxc4 47.Kg5
Ba3 48.f6 Rc5 49.Kg6 Rc6 50.Rb8+ Bf8 51.Ne7+ 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.25"]
[Round "6"]
[White "Timman, Jan"]
[Black "Bohm, Hans"]
[Result "0-1"]
[WhiteElo "2590"]
[BlackElo "2445"]
[EventDate "1977.04.18"]
[PlyCount "122"]
[ECO "C00"]

1.e4 e6 2.Nc3 d5 3.Nf3 d4 4.Ne2 c5 5.c3 dxc3 6.bxc3 Nf6 7.Ng3 Nc6 8.Bb5 
Bd7 9.O-O Bd6 10.Qe2 Bxg3 11.hxg3 a6 12.Bd3 e5 13.Rb1 O-O 14.Rxb7 Na5 15.
Rb1 c4 16.Bc2 Qe7 17.Rb4 Rfc8 18.Ba3 Bc6 19.Rfb1 Qc5 20.Nh4 g6 21.Qf3 Kg7 
22.g4 h6 23.g3 Qd6 24.Ng2 Qxd2 25.Ne3 Qd7 26.Rb6 Qe6 27.Rd1 Nb7 28.Qe2 Nd7
29.Rbb1 Bb5 30.Nd5 Nf6 31.Bc1 Nc5 32.Nxf6 Qxf6 33.Qe3 g5 34.Rd5 Na4 35.Ba3
Re8 36.Rbd1 Re6 37.Kg2 Rae8 38.R1d2 Nb6 39.Bc5 Na4 40.Bd6 Nb2 41.Bb4 Qg6 
42.Rd8 Nd3 43.Rxe8 Rxe8 44.Rd1 Qc6 45.Ra1 Qd7 46.Bd1 Nxb4 47.cxb4 Qd4 48.
Rc1 Rc8 49.Bc2 c3 50.Qf3 Qxb4 51.Bb3 Rc7 52.Qf5 Qe7 53.f4 Bd7 54.Qxe5+ 
Qxe5 55.fxe5 Bxg4 56.Kf2 Be6 57.Bxe6 fxe6 58.Rc2 h5 59.Ke2 g4 60.Kd3 Kg6 
61.a4 Kg5 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.25"]
[Round "6"]
[White "Van der Vliet, Fredrik"]
[Black "Van Baarle, John"]
[Result "1/2-1/2"]
[WhiteElo "2340"]
[BlackElo "2325"]
[EventDate "1977.04.18"]
[PlyCount "113"]
[ECO "A14"]

1.Nf3 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.O-O O-O 6.b3 c5 7.e3 Nc6 8.Bb2 b6 9.
Qe2 Bb7 10.Rd1 Rc8 11.d3 Qc7 12.Nc3 Rfe8 13.Rac1 Qb8 14.cxd5 exd5 15.d4 
Rcd8 16.dxc5 Bxc5 17.Nb5 Ne4 18.Nbd4 Nb4 19.Ba1 Bf8 20.Qb2 Rc8 21.Rxc8 
Qxc8 22.a3 Nc6 23.Rc1 Qa8 24.Nf5 f6 25.N5d4 Nxd4 26.Nxd4 Qd8 27.b4 Qd7 28.
Ne2 Rc8 29.Nf4 Rxc1+ 30.Qxc1 Qc6 31.Qd1 Bd6 32.Ne2 Qc4 33.f3 Ng5 34.Nd4 h6
35.Qc2 a5 36.bxa5 Qxc2 37.Nxc2 bxa5 38.Bc3 a4 39.Bb4 Bc7 40.Kf2 Ba6 41.Nd4
Kf7 42.Ne2 Bb5 43.Nc3 Bc6 44.Bf1 Nxf3 45.Bb5 Bxb5 46.Nxb5 Ne5 47.Nxc7 Nd3+
48.Ke2 Nxb4 49.Kd2 Nc6 50.Nxd5 Ke6 51.Nb6 Ne5 52.Kc3 Ng4 53.Kd4 Nxh2 54.
Nxa4 Nf3+ 55.Kc5 h5 56.Nc3 g5 57.a4 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.26"]
[Round "7"]
[White "Boersma, Paulus"]
[Black "Ligterink, Gert"]
[Result "1/2-1/2"]
[WhiteElo "2350"]
[BlackElo "2430"]
[EventDate "1977.04.18"]
[PlyCount "74"]
[ECO "B25"]

1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 e6 7.Nf3 Nge7 8.O-O O-O 
9.Kh1 Rb8 10.a4 a6 11.Be3 Nd4 12.Nh4 f5 13.Nb1 e5 14.c3 Ne6 15.Nd2 exf4 
16.gxf4 d5 17.exf5 gxf5 18.Ndf3 d4 19.cxd4 Nd5 20.Bd2 cxd4 21.Ng5 Nxg5 22.
fxg5 Ne3 23.Bxe3 dxe3 24.Qh5 Be6 25.g6 hxg6 26.Nxg6 Rf6 27.Nf4 Bf7 28.Qf3 
Qd4 29.Rac1 Rh6 30.Qg3 Re8 31.Rc7 e2 32.Re1 Re3 33.Qg5 Qe5 34.Rc8+ Kh7 35.
d4 Qf6 36.Qxf6 Bxf6 37.Rxe2 Bxd4 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.26"]
[Round "7"]
[White "Bohm, Hans"]
[Black "Hartoch, Robert"]
[Result "1-0"]
[WhiteElo "2445"]
[BlackElo "2405"]
[EventDate "1977.04.18"]
[PlyCount "153"]
[ECO "B26"]

1.e4 d6 2.Nc3 g6 3.d3 Bg7 4.g3 c5 5.Bg2 Nc6 6.Nge2 Rb8 7.a4 e6 8.O-O Nge7 
9.Be3 Nd4 10.Qd2 O-O 11.Nd1 Nec6 12.Nxd4 Nxd4 13.f3 b6 14.Rf2 f5 15.Ra3 
Qf6 16.c3 Nc6 17.b4 cxb4 18.cxb4 Bd7 19.b5 Ne5 20.Bg5 Qf7 21.Qb4 h6 22.Be3
Rfc8 23.Bf1 Bf8 24.Raa2 g5 25.Qb3 f4 26.gxf4 gxf4 27.Bd2 Ng6 28.d4 e5 29.
Qxf7+ Kxf7 30.d5 Be7 31.Nc3 Nh4 32.Kh1 Rg8 33.Ne2 Rbc8 34.Be1 Rc7 35.Ra3 
Rgc8 36.Rc3 Ng6 37.Rg2 Rc5 38.Bd2 Bh4 39.Rxc5 dxc5 40.Ng1 Be7 41.Bc4 Bd6 
42.Be1 Rb8 43.Ra2 Ke7 44.h4 h5 45.Kh2 Nh8 46.Nh3 Nf7 47.Nf2 Rg8 48.Nd3 Kd8
49.a5 Ke7 50.axb6 axb6 51.Ra7 Rb8 52.Nb2 Kd8 53.Bc3 Kc8 54.Nd3 Rb7 55.Ra1 
Kd8 56.Kg2 Ke7 57.Kf2 Rb8 58.Ra7 Kd8 59.Ke2 Ke7 60.Nb2 Rg8 61.Na4 Rb8 62.
Kd1 Ke8 63.Kc2 Kd8 64.Kb3 Bc7 65.Nb2 Kc8 66.Nd3 Kd8 67.d6 Nxd6 68.Bxe5 
Bxb5 69.Bxd6 Bxc4+ 70.Kxc4 Bxd6 71.Kb5 Bc7 72.e5 c4 73.Nxf4 Rc8 74.Ne6+ 
Kd7 75.Nxc7 Rxc7 76.Rxc7+ Kxc7 77.Kxc4 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.26"]
[Round "7"]
[White "Langeweg, Christian"]
[Black "Van der Vliet, Fredrik"]
[Result "1-0"]
[WhiteElo "2445"]
[BlackElo "2340"]
[EventDate "1977.04.18"]
[PlyCount "75"]
[ECO "A77"]

1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 exd5 5.cxd5 d6 6.Nc3 g6 7.e4 Bg7 8.Be2 O-O 
9.Nd2 Re8 10.O-O Nbd7 11.a4 Ne5 12.Ra3 Bg4 13.f3 Bd7 14.Qc2 g5 15.Nc4 Nxc4
16.Bxc4 Nh5 17.Ne2 Qf6 18.Bb5 Bxb5 19.axb5 Nf4 20.Ng3 Qd4+ 21.Kh1 Qb4 22.
Nf5 Qxb5 23.Qd1 Qd7 24.h4 h6 25.hxg5 hxg5 26.Bxf4 gxf4 27.Qc1 Qd8 28.Qxf4 
Qf6 29.Qg4 Kf8 30.f4 Rxe4 31.Rg3 Rae8 32.Nxg7 Re1 33.Rxe1 Rxe1+ 34.Kh2 
Qh6+ 35.Nh5 Ke7 36.Rh3 Re4 37.Qc8 Qg6 38.f5 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.26"]
[Round "7"]
[White "Ree, Hans"]
[Black "Kortschnoj, Viktor"]
[Result "0-1"]
[WhiteElo "2460"]
[BlackElo "2645"]
[EventDate "1977.04.18"]
[PlyCount "97"]
[ECO "E15"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Qa4 c5 6.Bg2 Bb7 7.O-O Qc8 8.Rd1 Be7 
9.Nc3 Bc6 10.Qc2 cxd4 11.Rxd4 Qb7 12.Bf4 O-O 13.Bd6 Bxd6 14.Rxd6 Na6 15.
Rad1 Rac8 16.b3 Nc5 17.Ne1 Bxg2 18.Nxg2 b5 19.Nxb5 Nce4 20.R6d4 Qxb5 21.
Qxe4 Nxe4 22.cxb5 d5 23.a4 Rc2 24.Kf1 Rb2 25.Ne3 Rxb3 26.Rc1 Rc3 27.Rxc3 
Nxc3 28.Nd1 Ne4 29.f3 Nf6 30.Rd3 Ra8 31.Rc3 Kf8 32.Nb2 Nd7 33.Rc6 Ke7 34.
Nd3 Kd8 35.Nb4 Nb6 36.a5 Nc4 37.Ra6 Kc7 38.e4 Kb7 39.exd5 exd5 40.Nxd5 Na3
41.Rd6 Nxb5 42.a6+ Kc8 43.Rc6+ Kd7 44.Rc5 Rb8 45.Rc2 Kd6 46.Rd2 Kc5 47.Ne3
Nd4 48.Nc2 Rb1+ 49.Kf2 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.26"]
[Round "7"]
[White "Van Baarle, John"]
[Black "Timman, Jan"]
[Result "0-1"]
[WhiteElo "2325"]
[BlackElo "2590"]
[EventDate "1977.04.18"]
[PlyCount "80"]
[ECO "B07"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f3 c6 5.a4 Bg7 6.Be3 O-O 7.Qd2 a5 8.h4 Nbd7 9.
Nge2 e5 10.O-O-O exd4 11.Nxd4 Ne5 12.Nb3 Nh5 13.Qf2 b5 14.Bc5 Nc4 15.Bxc4 
bxc4 16.Rxd6 Qc7 17.Nd2 Rb8 18.Re1 Re8 19.f4 Nxf4 20.Nxc4 Nh5 21.Bb6 Qb7 
22.Bxa5 Be6 23.Rxe6 Rxe6 24.e5 Bh6+ 25.Kb1 Qa6 26.Qd4 c5 27.Qe4 f5 28.Qd3 
Nf4 29.Qf1 Nxg2 30.Rd1 Ne3 31.Nxe3 Qxa5 32.Qc4 Qb6 33.Nb5 Kh8 34.Nd5 Qc6 
35.Re1 Bg7 36.Nf4 Rxe5 37.Rxe5 Bxe5 38.Ne6 Qh1+ 39.Ka2 Qe4 40.Qxc5 Qxa4+ 
0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.26"]
[Round "7"]
[White "Van Wijgerden, Cornelis"]
[Black "Hofland, Leonard"]
[Result "1-0"]
[WhiteElo "2430"]
[EventDate "1977.04.18"]
[PlyCount "67"]
[ECO "B05"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.h3 Bxf3 6.Qxf3 dxe5 7.dxe5 e6 8.Bc4 
c6 9.O-O Nd7 10.Re1 Qc7 11.Qe2 Bc5 12.c3 Qb6 13.Nd2 Nf4 14.Qf1 Ng6 15.Nf3 
Qc7 16.Qe2 Nb6 17.Bb3 Nd5 18.Bc2 O-O-O 19.a3 Rde8 20.c4 Ndf4 21.Qf1 f5 22.
b4 Be7 23.g3 Nh5 24.Qe2 Nf8 25.g4 fxg4 26.hxg4 g6 27.gxh5 gxh5 28.Kh1 Ng6 
29.Bxg6 hxg6 30.Ng5 Rhf8 31.Nxe6 Qd7 32.Nxf8 Qh3+ 33.Kg1 Rxf8 34.Qf1 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.26"]
[Round "7"]
[White "Van der Sterren, Paul"]
[Black "Donner, Jan"]
[Result "0-1"]
[WhiteElo "2375"]
[BlackElo "2470"]
[EventDate "1977.04.18"]
[PlyCount "88"]
[ECO "C75"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 d6 5.c3 Bd7 6.d4 Nge7 7.O-O Ng6 8.Nbd2 
Be7 9.Re1 h6 10.h3 O-O 11.a3 Bf6 12.dxe5 Ncxe5 13.Bc2 Nxf3+ 14.Nxf3 a5 15.
Be3 Re8 16.Bd4 a4 17.Nd2 Bxd4 18.cxd4 Nf4 19.Nf3 Bb5 20.Qd2 Qf6 21.Kh2 Ne6
22.Re3 c5 23.d5 Nd4 24.Rd1 Qf4+ 25.Kg1 Nxf3+ 26.Rxf3 Qxd2 27.Rxd2 Bd7 28.
Re3 b5 29.f4 f6 30.Rde2 Re7 31.e5 fxe5 32.fxe5 Rxe5 33.Rxe5 dxe5 34.Rxe5 
Re8 35.Rxe8+ Bxe8 36.Bf5 Kf7 37.d6 Bc6 38.Kf2 b4 39.g3 Kf6 40.Bc8 c4 41.d7
Ke7 42.d8=Q+ Kxd8 43.Be6 c3 44.bxc3 bxa3 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.27"]
[Round "8"]
[White "Donner, Jan"]
[Black "Boersma, Paulus"]
[Result "1/2-1/2"]
[WhiteElo "2470"]
[BlackElo "2350"]
[EventDate "1977.04.18"]
[PlyCount "86"]
[ECO "E44"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2 Bb7 6.a3 Be7 7.d5 O-O 8.Ng3 d6 9.
Be2 c6 10.e4 cxd5 11.cxd5 exd5 12.exd5 Na6 13.O-O Nc7 14.Nf5 Qd7 15.Nxe7+ 
Qxe7 16.Bf3 Qd7 17.Qd4 Qf5 18.Qf4 Qxf4 19.Bxf4 Rfd8 20.Rad1 Kf8 21.Rfe1 b5
22.g4 a5 23.g5 Nfe8 24.Rd4 g6 25.Be2 b4 26.axb4 axb4 27.Rxb4 Nxd5 28.Nxd5 
Bxd5 29.Rd1 Be6 30.Kg2 Rab8 31.Bxd6+ Nxd6 32.Rxd6 Rxb4 33.Rxd8+ Kg7 34.Rd2
h6 35.gxh6+ Kxh6 36.Bd1 Bb3 37.Bxb3 Rxb3 38.Kf1 g5 39.Ke2 g4 40.Kd1 Kg6 
41.Kc2 Rh3 42.b4 Rxh2 43.b5 Rh5 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.27"]
[Round "8"]
[White "Hartoch, Robert"]
[Black "Van Baarle, John"]
[Result "1-0"]
[WhiteElo "2405"]
[BlackElo "2325"]
[EventDate "1977.04.18"]
[PlyCount "75"]
[ECO "B53"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Bd7 5.c4 Nc6 6.Qd2 g6 7.b3 Bg7 8.Nc3 Nf6
9.Bb2 O-O 10.h3 Qa5 11.Bd3 a6 12.a3 Rfc8 13.b4 Qd8 14.O-O Be6 15.Nd5 Nd7 
16.Bxg7 Kxg7 17.Nf4 Nde5 18.Nxe6+ fxe6 19.Ng5 Qd7 20.f4 Nxd3 21.Qxd3 h6 
22.Nf3 Rf8 23.Nh4 e5 24.f5 g5 25.Ng6 Rf6 26.h4 Nd4 27.hxg5 hxg5 28.Ra2 Rc8
29.Raf2 Qc7 30.Qg3 Qxc4 31.Qxg5 Kf7 32.Qh5 Kg7 33.Nxe7 Rh8 34.Qg5+ Kf7 35.
Nd5 Rfh6 36.Qe7+ Kg8 37.Qe8+ Kg7 38.f6+ 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.27"]
[Round "8"]
[White "Hofland, Leonard"]
[Black "Ree, Hans"]
[Result "0-1"]
[BlackElo "2460"]
[EventDate "1977.04.18"]
[PlyCount "85"]
[ECO "A20"]

1.g3 e5 2.c4 Nf6 3.Bg2 c6 4.Nf3 e4 5.Nd4 d5 6.cxd5 Qxd5 7.Nc2 Qh5 8.h3 Qg6
9.Ne3 Bd6 10.d3 exd3 11.Qxd3 Qxd3 12.exd3 Na6 13.O-O Be6 14.Nc3 O-O-O 15.
d4 Be7 16.Rd1 Nc7 17.b3 Nfd5 18.Ne2 Rhe8 19.Nc4 Nb5 20.Be3 Nxe3 21.fxe3 
Bg5 22.Nf4 Bxc4 23.bxc4 Nd6 24.d5 c5 25.Rd3 Nxc4 26.Rc1 Rxe3 27.Rxe3 Nxe3 
28.Rxc5+ Kd7 29.Bf3 Bxf4 30.gxf4 Kd6 31.Rc3 Nf5 32.Kf2 Re8 33.Rb3 Re7 34.
Rc3 Rc7 35.Rxc7 Kxc7 36.Be4 g6 37.Kf3 Kd6 38.Kg4 Ne7 39.Kg5 Ng8 40.Bg2 h6+
41.Kg4 f5+ 42.Kf3 Nf6 43.h4 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.27"]
[Round "8"]
[White "Kortschnoj, Viktor"]
[Black "Bohm, Hans"]
[Result "1-0"]
[WhiteElo "2645"]
[BlackElo "2445"]
[EventDate "1977.04.18"]
[PlyCount "81"]
[ECO "A42"]

1.c4 d6 2.Nc3 g6 3.d4 Bg7 4.e4 Nc6 5.Be3 e5 6.d5 Nd4 7.Nge2 Nxe2 8.Bxe2 f5
9.exf5 gxf5 10.f4 Ne7 11.fxe5 dxe5 12.Bg5 Qd7 13.c5 O-O 14.Qb3 Kh8 15.
O-O-O Ng6 16.Bb5 Qf7 17.Bc4 Qd7 18.d6 c6 19.h4 e4 20.h5 Ne5 21.Be7 Bh6+ 
22.Kb1 Re8 23.Ne2 b5 24.cxb6 axb6 25.Nf4 Rxe7 26.dxe7 Qxe7 27.g3 b5 28.Be6
Bxf4 29.Bxc8 Rxc8 30.gxf4 Nd3 31.Rhg1 Qf6 32.Rg3 Nxf4 33.Rd6 Qe5 34.Rxc6 
Rd8 35.h6 Ne2 36.Rg7 e3 37.Qd3 Qe4 38.Qxe4 fxe4 39.Rd7 Rg8 40.Rcc7 Rg1+ 
41.Kc2 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.27"]
[Round "8"]
[White "Langeweg, Christian"]
[Black "Van der Sterren, Paul"]
[Result "1-0"]
[WhiteElo "2445"]
[BlackElo "2375"]
[EventDate "1977.04.18"]
[PlyCount "77"]
[ECO "D21"]

1.d4 d5 2.c4 dxc4 3.Nf3 Nd7 4.Na3 e6 5.Nxc4 b5 6.Ncd2 c5 7.e3 c4 8.b3 c3 
9.Ne4 b4 10.Bb5 Qb6 11.Ba4 Nf6 12.Nxf6+ gxf6 13.d5 Bc5 14.O-O Ke7 15.dxe6 
fxe6 16.Nd4 h5 17.Nc6+ Kf7 18.e4 Qc7 19.Be3 Bd6 20.f4 Nc5 21.Ne5+ Kg7 22.
Nc4 Be7 23.Bxc5 Bxc5+ 24.Kh1 Bb7 25.Qf3 Qf7 26.a3 Qg6 27.Rfe1 a5 28.Bd7 f5
29.Ne5 fxe4 30.Qe2 Ba6 31.Bb5 Qf5 32.axb4 Bd6 33.Bxa6 Qxf4 34.g3 Qxe5 35.
Rxa5 Qf6 36.Qxe4 Rab8 37.Bc4 Rxb4 38.Ra7+ Kh6 39.Qe3+ 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.27"]
[Round "8"]
[White "Ligterink, Gert"]
[Black "Van Wijgerden, Cornelis"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[BlackElo "2430"]
[EventDate "1977.04.18"]
[PlyCount "50"]
[ECO "B08"]

1.e4 g6 2.d4 Bg7 3.Nf3 d6 4.Be2 Nf6 5.Nc3 O-O 6.O-O c6 7.a4 Qc7 8.Be3 Ng4 
9.Bg5 f6 10.Bd2 Nh6 11.Qc1 Nf7 12.Be3 b6 13.d5 c5 14.a5 bxa5 15.Nd2 f5 16.
exf5 Bxf5 17.Ra3 Bc8 18.Nc4 Na6 19.Nb5 Qd7 20.Nxa5 Nb4 21.c4 a6 22.Nc3 Qf5
23.Na2 Qc2 24.Nxb4 Qxe2 25.Nd3 Ne5 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.27"]
[Round "8"]
[White "Van der Vliet, Fredrik"]
[Black "Timman, Jan"]
[Result "0-1"]
[WhiteElo "2340"]
[BlackElo "2590"]
[EventDate "1977.04.18"]
[PlyCount "76"]
[ECO "B07"]

1.d4 d6 2.e4 Nf6 3.Nc3 g6 4.g3 Bg7 5.Bg2 O-O 6.Nge2 Nbd7 7.O-O e5 8.b3 
exd4 9.Nxd4 Re8 10.Bb2 Nc5 11.Re1 a5 12.a4 c6 13.f3 h5 14.Qd2 Qb6 15.Kh1 
Bd7 16.Rad1 Rad8 17.Re2 Bc8 18.Ba1 Re7 19.Nb1 h4 20.Bc3 Rde8 21.g4 Nfxe4 
22.fxe4 Bxg4 23.h3 Bxe2 24.Nxe2 Nxe4 25.Bxe4 Rxe4 26.Ng1 Bxc3 27.Nxc3 Re3 
28.Rf1 Qb4 29.Nb1 Qe4+ 30.Qg2 d5 31.Qxe4 dxe4 32.Nd2 Rc3 33.Rc1 b5 34.Nb1 
Rc5 35.axb5 cxb5 36.Na3 Rd8 37.Ne2 Rd2 38.Ng1 Rg5 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.29"]
[Round "9"]
[White "Boersma, Paulus"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[WhiteElo "2350"]
[BlackElo "2445"]
[EventDate "1977.04.18"]
[PlyCount "122"]
[ECO "C08"]

1.e4 c5 2.Nf3 e6 3.c3 d5 4.exd5 exd5 5.d4 a6 6.Be2 Nc6 7.O-O Bd6 8.dxc5 
Bxc5 9.Nbd2 Nge7 10.Nb3 Bb6 11.Bf4 O-O 12.Qd2 Re8 13.Rad1 Ng6 14.Bg3 Qf6 
15.Rfe1 Bf5 16.Qg5 Qxg5 17.Nxg5 Rad8 18.Nf3 Be4 19.Nfd4 f5 20.Bh5 a5 21.
Bxg6 hxg6 22.Bh4 Rc8 23.Nb5 Bc2 24.Rc1 a4 25.N3d4 Nxd4 26.Nxd4 Bd3 27.Nf3 
a3 28.bxa3 Bc5 29.Ne5 Be4 30.Nxg6 Bxa3 31.f3 Bxc1 32.Rxc1 Kf7 33.Ne7 Rxe7 
34.Bxe7 Kxe7 35.fxe4 dxe4 36.Rb1 Rxc3 37.Rxb7+ Kf6 38.h4 Rc1+ 39.Kf2 Rc2+ 
40.Kg3 Rxa2 41.Rb6+ Kf7 42.Rb7+ Kg6 43.Rb6+ Kh5 44.Rb5 g6 45.Rb7 Kh6 46.
Re7 Rd2 47.Ra7 Rd6 48.Rc7 g5 49.hxg5+ Kxg5 50.Rg7+ Kf6 51.Rg8 Ke5 52.Re8+ 
Re6 53.Ra8 Rg6+ 54.Kf2 Kf4 55.Rh8 e3+ 56.Kf1 Rd6 57.Rh4+ Ke5 58.Ke2 f4 59.
Rh5+ Ke4 60.Rg5 Rd2+ 61.Ke1 Ra2 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.29"]
[Round "9"]
[White "Bohm, Hans"]
[Black "Hofland, Leonard"]
[Result "1-0"]
[WhiteElo "2445"]
[EventDate "1977.04.18"]
[PlyCount "108"]
[ECO "E90"]

1.d4 g6 2.c4 Nf6 3.Nc3 c5 4.d5 Bg7 5.e4 d6 6.Bd3 O-O 7.Nf3 e5 8.h3 Na6 9.
g4 Nc7 10.Bg5 Rb8 11.Qd2 a6 12.a4 b6 13.b3 Bd7 14.Ke2 b5 15.a5 Rb7 16.Nh2 
Qe7 17.f3 Rfb8 18.Rhb1 Qf8 19.Nf1 h6 20.Be3 Kh7 21.Ng3 Ng8 22.h4 Qd8 23.h5
g5 24.Ra2 Nf6 25.Rf1 Kg8 26.Nd1 Nh7 27.Qc1 Ne8 28.Bd2 Bf8 29.Ne3 Ng7 30.
Kf2 Be7 31.Qc2 Nf6 32.Rc1 Nfe8 33.b4 cxb4 34.Qb3 Rc8 35.Qxb4 Rbc7 36.Rac2 
Rc5 37.cxb5 axb5 38.Qa3 Qc7 39.Bb4 Rxc2+ 40.Rxc2 Qb8 41.Rxc8 Bxc8 42.Ne2 
Ba6 43.Nc3 Nf6 44.Qb2 Bd8 45.Qe2 Qa7 46.Bxb5 Bc8 47.Bxd6 Bxa5 48.Bxe5 Nd7 
49.Bxd7 Bxd7 50.Nb5 Qc5 51.Nd4 Bb6 52.Kg2 Ne8 53.Ndc2 Bb5 54.Qd2 Qe7 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.29"]
[Round "9"]
[White "Ree, Hans"]
[Black "Ligterink, Gert"]
[Result "1-0"]
[WhiteElo "2460"]
[BlackElo "2430"]
[EventDate "1977.04.18"]
[PlyCount "75"]
[ECO "E97"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 
9.Bd2 Nh5 10.g3 f5 11.exf5 Nxf5 12.Ne4 Nf6 13.Bd3 Nxe4 14.Bxe4 Nd4 15.Nxd4
exd4 16.Kg2 Qf6 17.Qb3 b6 18.Qd3 Bd7 19.h4 Rae8 20.Rae1 Bf5 21.Bxf5 gxf5 
22.b3 Qg6 23.Rh1 h5 24.f3 Be5 25.Bg5 Bxg3 26.Reg1 Kh7 27.Kh3 f4 28.Qxg6+ 
Kxg6 29.Bxf4 Rxf4 30.Kxg3 Kf5 31.Kf2 Re3 32.Rh3 Re7 33.Rd1 Rg7 34.Rg3 Rgg4
35.Kg2 Rxg3+ 36.Kxg3 Ke5 37.Re1+ Kf5 38.Re8 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.29"]
[Round "9"]
[White "Timman, Jan"]
[Black "Hartoch, Robert"]
[Result "1-0"]
[WhiteElo "2590"]
[BlackElo "2405"]
[EventDate "1977.04.18"]
[PlyCount "42"]
[ECO "B07"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Bg5 c6 5.f4 Qb6 6.Qd2 Qxb2 7.Rb1 Qa3 8.Bd3 Bg7
9.Nf3 h6 10.Bh4 e5 11.fxe5 dxe5 12.Nxe5 O-O 13.Nc4 Qe7 14.O-O Nxe4 15.Qe1 
Bxd4+ 16.Kh1 Bxc3 17.Bxe7 Bxe1 18.Rbxe1 Ng5 19.Bxf8 Kxf8 20.h4 Ne6 21.Nd6 
Nd7 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.29"]
[Round "9"]
[White "Van Baarle, John"]
[Black "Kortschnoj, Viktor"]
[Result "0-1"]
[WhiteElo "2325"]
[BlackElo "2645"]
[EventDate "1977.04.18"]
[PlyCount "62"]
[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.Bg2 Bd7 10.Nb3 Be7 11.f4 Nh5 12.Qd2 f6 13.Bh4 Nxf4 14.Qxf4 g5 15.
Bxg5 fxg5 16.Qg3 Qb6 17.O-O-O O-O-O 18.Bf1 Rdf8 19.Be2 Qf2 20.Rdg1 a6 21.
h3 Ne5 22.Kd1 Rh4 23.Qxf2 Rxf2 24.Rg3 Rf8 25.Nd4 d5 26.Bg4 Nxg4 27.Rxg4 
dxe4 28.Rxh4 gxh4 29.Nxe4 Rf4 30.Re1 e5 31.Nb3 Bxh3 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.29"]
[Round "9"]
[White "Van Wijgerden, Cornelis"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[BlackElo "2470"]
[EventDate "1977.04.18"]
[PlyCount "93"]
[ECO "C50"]

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 d6 5.Nxd4 g6 6.Nc3 Bg7 7.Be3 Nf6 8.f3 
O-O 9.Qd2 Nxd4 10.Bxd4 Be6 11.Bxe6 fxe6 12.O-O-O e5 13.Be3 Qd7 14.Nd5 Nh5 
15.c4 Qf7 16.b3 c6 17.Nc3 Nf4 18.Qf2 Qc7 19.Kb1 b6 20.Qb2 Rfd8 21.Rd2 a6 
22.Rhd1 Bf8 23.Qc2 Rab8 24.g3 Ne6 25.Ne2 Qe7 26.Rd3 Qf6 27.Qd2 Rdc8 28.Bh6
Be7 29.h4 b5 30.cxb5 axb5 31.Rc1 Nc5 32.Bg5 Qf7 33.Rdc3 b4 34.Rc4 Bf8 35.
Qe3 Qd7 36.Bh6 Bxh6 37.Qxh6 Ne6 38.Qd2 c5 39.Qd5 Kh8 40.f4 Nc7 41.Qd3 Nb5 
42.Rxc5 Nc3+ 43.R5xc3 bxc3 44.fxe5 c2+ 45.Kb2 Rd8 46.Nc3 Qg7 47.exd6 
1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.29"]
[Round "9"]
[White "Van der Sterren, Paul"]
[Black "Van der Vliet, Fredrik"]
[Result "1-0"]
[WhiteElo "2375"]
[BlackElo "2340"]
[EventDate "1977.04.18"]
[PlyCount "77"]
[ECO "B93"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 Qc7 7.Bd3 g6 8.O-O Bg7
9.Nf3 Nbd7 10.Qe1 Nc5 11.Qh4 b5 12.a3 Bb7 13.f5 gxf5 14.exf5 Nxd3 15.cxd3 
Qc5+ 16.Kh1 Qxf5 17.Bg5 h6 18.Be3 Qxd3 19.Bd4 Kf8 20.Rad1 Qc4 21.Qe1 Re8 
22.Nh4 e5 23.Be3 d5 24.Nf5 Qg4 25.Bc5+ Kg8 26.Rd3 Nh5 27.Nd6 Re7 28.Nxb7 
Rxb7 29.Rxd5 Kh7 30.h3 Qg6 31.Rd6 f6 32.Ne4 Rg8 33.g4 Nf4 34.Kh2 Rc7 35.b4
Re8 36.Rf2 Re6 37.Rxf4 Rxd6 38.Bxd6 Rc4 39.Rf5 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.30"]
[Round "10"]
[White "Donner, Jan"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[WhiteElo "2470"]
[BlackElo "2460"]
[EventDate "1977.04.18"]
[PlyCount "85"]
[ECO "D86"]

1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 c5 8.Ne2 
Nc6 9.Be3 cxd4 10.cxd4 Qa5+ 11.Bd2 Qd8 12.d5 Ne5 13.Bc3 O-O 14.Bb3 Bd7 15.
f4 Ng4 16.Bxg7 Kxg7 17.Qd4+ Kg8 18.h3 Qa5+ 19.Kf1 Nf6 20.e5 Ne8 21.Kg1 Nc7
22.Nc3 Rfd8 23.Kh2 Bc6 24.d6 exd6 25.exd6 Ne8 26.Qe5 Qb4 27.Nd5 Bxd5 28.
Bxd5 Qxd6 29.Bxb7 Qxe5 30.fxe5 Rab8 31.Rab1 Ng7 32.a4 Ne6 33.Rhc1 Rd7 34.
Bc6 Rxb1 35.Rxb1 Rc7 36.Rb8+ Kg7 37.Be8 Re7 38.Bb5 Nc5 39.Rc8 Rxe5 40.Rc7 
a5 41.Ra7 h5 42.Rxa5 Nxa4 43.Rxa4 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.30"]
[Round "10"]
[White "Hofland, Leonard"]
[Black "Van Baarle, John"]
[Result "1-0"]
[BlackElo "2325"]
[EventDate "1977.04.18"]
[PlyCount "81"]
[ECO "A19"]

1.c4 Nf6 2.Nc3 e6 3.e4 c5 4.e5 Ng8 5.d4 cxd4 6.Qxd4 Nc6 7.Qe4 f5 8.Qe2 d6 
9.Nf3 dxe5 10.Nxe5 Nf6 11.Nxc6 bxc6 12.g3 Bd7 13.Bg2 Bb4 14.O-O Qe7 15.Bf4
O-O 16.Rfd1 Rfe8 17.Be5 Ng4 18.a3 Bc5 19.Ne4 Bb6 20.Bd6 Qf7 21.c5 Bd8 22.
Bf4 e5 23.Nd6 exf4 24.Qxg4 Qb3 25.Qxf4 Rf8 26.Qc4+ Qxc4 27.Nxc4 Be8 28.Nd6
Bf6 29.Nxe8 Raxe8 30.Bxc6 Rc8 31.Bd5+ Kh8 32.c6 Bxb2 33.Ra2 Bc3 34.Rc2 Bf6
35.Be6 Rc7 36.Bxf5 Be7 37.Rd7 Bd8 38.Rcd2 Rxd7 39.Rxd7 Bb6 40.c7 g6 41.Rf7
1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.30"]
[Round "10"]
[White "Kortschnoj, Viktor"]
[Black "Timman, Jan"]
[Result "1-0"]
[WhiteElo "2645"]
[BlackElo "2590"]
[EventDate "1977.04.18"]
[PlyCount "73"]
[ECO "A28"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.e3 Bb4 5.Qc2 d6 6.d3 Bg4 7.Be2 Bxc3+ 8.Qxc3 
Qd7 9.h3 Bh5 10.g4 Bg6 11.e4 a5 12.Be3 b6 13.Nh4 Qe7 14.g5 Nh5 15.Bxh5 
Bxh5 16.Nf5 Qf8 17.f4 O-O-O 18.Ng3 h6 19.gxh6 Rxh6 20.fxe5 Rh7 21.d4 Bf3 
22.O-O Bxe4 23.Nxe4 dxe5 24.d5 Rxh3 25.Kg2 Rh4 26.Ng3 Nd4 27.Bxd4 exd4 28.
Qd2 Rd6 29.Rf4 Qh8 30.Rxh4 Qxh4 31.Rh1 Qg4 32.Qe2 Qg6 33.Qe4 b5 34.Qxg6 
Rxg6 35.cxb5 Rd6 36.Nf5 Rg6+ 37.Kf3 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.30"]
[Round "10"]
[White "Langeweg, Christian"]
[Black "Van Wijgerden, Cornelis"]
[Result "1/2-1/2"]
[WhiteElo "2445"]
[BlackElo "2430"]
[EventDate "1977.04.18"]
[PlyCount "76"]
[ECO "B07"]

1.d4 g6 2.e4 Bg7 3.Nf3 d6 4.c3 Nf6 5.Bd3 O-O 6.O-O b6 7.a4 Bb7 8.Re1 e6 9.
a5 c5 10.e5 dxe5 11.dxe5 Nd5 12.Na3 Nd7 13.a6 Bc6 14.Bb5 Qc7 15.Qe2 Bxb5 
16.Nxb5 Qc6 17.c4 Nb4 18.Bg5 Nb8 19.Be7 Rc8 20.Ng5 Qd7 21.Bf6 N8c6 22.Bxg7
Kxg7 23.Red1 Nd4 24.Qe4 Qe7 25.Nxd4 Qxg5 26.Nb5 Rd8 27.Rd6 Qf5 28.Qxf5 
gxf5 29.Rad1 Rxd6 30.Rxd6 Nxa6 31.Rd7 Nb4 32.Nc7 Rc8 33.Nxe6+ Kg8 34.Nd8 
Nc6 35.Nxf7 f4 36.e6 Re8 37.Nh6+ Kh8 38.Nf7+ Kg8 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.30"]
[Round "10"]
[White "Ligterink, Gert"]
[Black "Bohm, Hans"]
[Result "1-0"]
[WhiteElo "2430"]
[BlackElo "2445"]
[EventDate "1977.04.18"]
[PlyCount "57"]
[ECO "C07"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.Ngf3 c4 5.e5 b5 6.g3 Nc6 7.c3 b4 8.Ng1 Rb8 9.
Bg2 Bd7 10.Ne2 Qa5 11.O-O bxc3 12.bxc3 Ba3 13.Nb3 Qa4 14.Bxa3 Qxa3 15.Nc5 
Nxe5 16.Nf4 Nd3 17.Nfxd3 cxd3 18.Rb1 Rb6 19.Qg4 g6 20.Qf4 Ne7 21.Qe5 Rg8 
22.c4 Qxa2 23.Ra1 Qxc4 24.Rxa7 Nc6 25.Ra8+ Ke7 26.Qg5+ f6 27.Qh6 Nxd4 28.
Rxg8 Qxc5 29.Qf8# 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.30"]
[Round "10"]
[White "Van der Sterren, Paul"]
[Black "Boersma, Paulus"]
[Result "1-0"]
[WhiteElo "2375"]
[BlackElo "2350"]
[EventDate "1977.04.18"]
[PlyCount "65"]
[ECO "B67"]

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 b5 10.Bxf6 gxf6 11.Nxc6 Bxc6 12.Qe3 Qe7 13.Re1 Qa7 14.Nd5 Qxe3+ 
15.Rxe3 O-O-O 16.Nxf6 Bg7 17.Nh5 Bd4 18.Re1 Rhg8 19.c3 Bh8 20.Rg1 d5 21.e5
d4 22.g4 dxc3 23.bxc3 Bf3 24.h3 Kc7 25.Rg3 Bd5 26.Kb2 Kb6 27.Rd1 Be4 28.
Bd3 Rd7 29.Re3 Bg6 30.Ng3 h5 31.gxh5 Bh7 32.Bxh7 Rxg3 33.Rxg3 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.04.30"]
[Round "10"]
[White "Van der Vliet, Fredrik"]
[Black "Hartoch, Robert"]
[Result "1-0"]
[WhiteElo "2340"]
[BlackElo "2405"]
[EventDate "1977.04.18"]
[PlyCount "109"]
[ECO "A81"]

1.Nf3 f5 2.b3 d6 3.d4 g6 4.Bb2 Bg7 5.g3 Nf6 6.Bg2 O-O 7.O-O c6 8.Nbd2 Na6 
9.e3 Nc7 10.Qe2 Kh8 11.Ne1 Be6 12.Nd3 Qd7 13.Rae1 Rae8 14.f3 Nh5 15.Rf2 b6
16.c4 c5 17.Rd1 Bg8 18.f4 Ne6 19.Nf3 Nf6 20.Rff1 Qc8 21.Rfe1 Nd8 22.Nf2 
Qa6 23.Ba1 Ne6 24.a4 cxd4 25.exd4 Nc7 26.d5 e6 27.dxe6 Nxe6 28.Qc2 Rd8 29.
Nd4 Nxd4 30.Bxd4 Qc8 31.Re7 Rd7 32.Rxd7 Qxd7 33.Qd3 Rd8 34.Bc3 Qc7 35.Qd2 
Ne8 36.Bxg7+ Nxg7 37.Bd5 Bxd5 38.Qxd5 Qe7 39.Kg2 h6 40.Rd3 Kh7 41.Rd2 Qe3 
42.Rd3 Qe1 43.Qf7 Re8 44.Rxd6 Re2 45.Qxg6+ Kh8 46.Rd8+ Ne8 47.Qxh6+ Kg8 
48.Qg6+ Kh8 49.Qh5+ Kg8 50.Qg5+ Kh8 51.Qh5+ Kg8 52.Qf3 Kg7 53.Rd7+ Kf8 54.
Rd5 Ng7 55.Re5 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.01"]
[Round "11"]
[White "Boersma, Paulus"]
[Black "Van der Vliet, Fredrik"]
[Result "1/2-1/2"]
[WhiteElo "2350"]
[BlackElo "2340"]
[EventDate "1977.04.18"]
[PlyCount "55"]
[ECO "B82"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 Qc7 7.Nf3 e6 8.Bd3 Nc6
9.O-O Be7 10.Kh1 b5 11.Qe2 Nd7 12.a4 b4 13.Nd1 Nc5 14.Be3 O-O 15.Bxc5 dxc5
16.e5 f6 17.Ne3 fxe5 18.fxe5 Bb7 19.Nc4 Rf7 20.Nd6 Rff8 21.Qe4 g6 22.Nxb7 
Qxb7 23.Qg4 Qc8 24.Bxg6 hxg6 25.Qxg6+ Kh8 26.Qh6+ Kg8 27.Qg6+ Kh8 28.Qh6+ 
1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.01"]
[Round "11"]
[White "Bohm, Hans"]
[Black "Donner, Jan"]
[Result "0-1"]
[WhiteElo "2445"]
[BlackElo "2470"]
[EventDate "1977.04.18"]
[PlyCount "119"]
[ECO "D00"]

1.d4 Nf6 2.Bg5 d5 3.Bxf6 exf6 4.e3 f5 5.Bd3 g6 6.Qf3 c6 7.Ne2 Nd7 8.c4 Nb6
9.c5 Nd7 10.h4 Bxc5 11.dxc5 Ne5 12.Qg3 Nxd3+ 13.Kd2 f4 14.Nxf4 Nxc5 15.f3 
Qf6 16.Nc3 d4 17.Ne4 dxe3+ 18.Kxe3 Nxe4 19.fxe4 Qxb2 20.Rad1 Qe5 21.h5 g5 
22.Ne2 Qxg3+ 23.Nxg3 Be6 24.e5 Ke7 25.h6 Rhd8 26.Ne4 Bd5 27.Nxg5 f6 28.
Nxh7 fxe5 29.Rh5 Rh8 30.Ng5 Rag8 31.Rf1 Rg6 32.h7 Rf6 33.Rf2 Rxf2 34.Kxf2 
Bxa2 35.g4 Bd5 36.Ke3 Kf6 37.Nh3 Kg6 38.Rxe5 Rxh7 39.Nf4+ Kf6 40.Rf5+ Ke7 
41.g5 Bg8 42.Ke4 Rh1 43.Re5+ Kd6 44.Kf5 Bb3 45.g6 Rg1 46.Re8 a5 47.Kf6 a4 
48.g7 a3 49.Ne6 Bxe6 50.Rxe6+ Kc5 51.Re5+ Kb4 52.Re4+ Kb5 53.Re5+ c5 54.
Re1 Rxg7 55.Kxg7 Ka4 56.Kf6 a2 57.Ke5 b5 58.Kd5 c4 59.Kd4 Kb3 60.Re3+ 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.01"]
[Round "11"]
[White "Hartoch, Robert"]
[Black "Kortschnoj, Viktor"]
[Result "1/2-1/2"]
[WhiteElo "2405"]
[BlackElo "2645"]
[EventDate "1977.04.18"]
[PlyCount "80"]
[ECO "A20"]

1.g3 e5 2.c4 c6 3.Qa4 Na6 4.Bg2 Nc5 5.Qc2 d5 6.b4 Ne6 7.Bb2 e4 8.Nh3 Nf6 
9.O-O Be7 10.cxd5 cxd5 11.d3 O-O 12.dxe4 dxe4 13.Nd2 Nd4 14.Qc4 Nf3+ 15.
Nxf3 exf3 16.Rfd1 Qb6 17.exf3 Be6 18.Qd4 Bxb4 19.Qh4 Bxh3 20.Bxh3 Bc5 21.
Bxf6 Qxf6 22.Qxf6 gxf6 23.Rd7 b6 24.Rad1 Rfe8 25.Kf1 a5 26.a4 Re7 27.Rd8+ 
Rxd8 28.Rxd8+ Kg7 29.Bd7 Re5 30.Bb5 Re6 31.f4 Rd6 32.Rxd6 Bxd6 33.Bd3 Bc5 
34.Kg2 h6 35.f3 Bd4 36.Kh3 Bg1 37.f5 Kf8 38.Kg2 Bd4 39.f4 Bc5 40.Kf3 Bd4 
1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.01"]
[Round "11"]
[White "Ree, Hans"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[WhiteElo "2460"]
[BlackElo "2445"]
[EventDate "1977.04.18"]
[PlyCount "76"]
[ECO "E14"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.e3 Bb7 5.Bd3 d5 6.O-O Bd6 7.Nc3 O-O 8.Qe2 a6 
9.e4 dxe4 10.Nxe4 Nxe4 11.Bxe4 Bxe4 12.Qxe4 Nd7 13.Rd1 h6 14.Ne5 Bxe5 15.
dxe5 Qe7 16.Be3 Rad8 17.h3 Nc5 18.Qc2 a5 19.f4 Rxd1+ 20.Rxd1 Rd8 21.Kf1 
Rxd1+ 22.Qxd1 f5 23.exf6 Qxf6 24.b3 Qf5 25.Kg1 Kh7 26.Kh2 Nd3 27.Qf3 Nb4 
28.Bd4 Nxa2 29.Be5 Nc1 30.Bxc7 Qc2 31.Be5 Nxb3 32.Qb7 Qg6 33.Qxb6 Nd2 34.
c5 Nc4 35.Qc7 Nxe5 36.Qxe5 Qc2 37.Qd6 a4 38.c6 a3 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.01"]
[Round "11"]
[White "Timman, Jan"]
[Black "Hofland, Leonard"]
[Result "1-0"]
[WhiteElo "2590"]
[EventDate "1977.04.18"]
[PlyCount "55"]
[ECO "B09"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 c5 6.dxc5 Qa5 7.Bd3 Qxc5 8.Qe2 
Bg4 9.Be3 Qa5 10.O-O O-O 11.Qe1 Nc6 12.Nd2 Bd7 13.h3 Rac8 14.a3 Qc7 15.Qf2
Qb8 16.Rad1 b6 17.Qh4 Na5 18.Rde1 Be6 19.f5 Bd7 20.Nd5 Nc6 21.Bg5 Nxd5 22.
exd5 Ne5 23.Bxe7 Nxd3 24.f6 Nxe1 25.fxg7 Rfe8 26.Ne4 h5 27.Nf6+ Kxg7 28.
Nxh5+ 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.01"]
[Round "11"]
[White "Van Baarle, John"]
[Black "Ligterink, Gert"]
[Result "1/2-1/2"]
[WhiteElo "2325"]
[BlackElo "2430"]
[EventDate "1977.04.18"]
[PlyCount "97"]
[ECO "B31"]

1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.Bxc6 dxc6 6.d3 Nf6 7.Nbd2 O-O 8.Re1
b6 9.a4 a5 10.Nc4 Be6 11.Qe2 h6 12.Bd2 Nd7 13.Ra3 Qc7 14.b3 b5 15.Ne3 Kh7 
16.h4 Nf6 17.Ra2 Ng4 18.Nxg4 Bxg4 19.Ng5+ hxg5 20.Qxg4 gxh4 21.Qxh4+ Kg8 
22.Qg5 Qd6 23.Bf4 e5 24.Bd2 c4 25.axb5 cxb3 26.cxb3 cxb5 27.Rxa5 Rxa5 28.
Bxa5 Qxd3 29.Re3 Qd1+ 30.Kh2 Qd6 31.Rh3 Ra8 32.Bd2 Qd8 33.Rc3 Bf6 34.Qh6 
Bg7 35.Qg5 Bf6 36.Qe3 Be7 37.Rd3 Qe8 38.Rd5 Rd8 39.Qb6 Rb8 40.Qa6 Bf8 41.
Bg5 Bg7 42.Bf6 Kh7 43.Qd6 Qh8 44.Bxe5 Re8 45.f4 Bxe5 46.fxe5 Kg8+ 47.Kg1 
Qh4 48.Qb4 Rc8 49.Qd2 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.01"]
[Round "11"]
[White "Van Wijgerden, Cornelis"]
[Black "Van der Sterren, Paul"]
[Result "1-0"]
[WhiteElo "2430"]
[BlackElo "2375"]
[EventDate "1977.04.18"]
[PlyCount "105"]
[ECO "C02"]

1.e4 e6 2.d4 d5 3.e5 c5 4.Nf3 cxd4 5.Bd3 Nc6 6.O-O f6 7.Qe2 fxe5 8.Nxe5 
Nxe5 9.Qxe5 Nf6 10.Bf4 Qb6 11.Nd2 Be7 12.Nb3 O-O 13.Bg3 h6 14.Qc7 Qxc7 15.
Bxc7 Bd7 16.Rfe1 Ne8 17.Be5 Kf7 18.Nxd4 Nd6 19.Nf3 Rfc8 20.Bg3 Be8 21.Re2 
Nf5 22.Be5 g5 23.h3 h5 24.Bc3 Bf6 25.Rae1 Bd7 26.Bxf6 Kxf6 27.Bxf5 exf5 
28.Re7 g4 29.Rxd7 gxf3 30.c3 Rg8 31.Rd6+ Kf7 32.Rxd5 Rxg2+ 33.Kf1 Kf6 34.
Rd6+ Kf7 35.Re3 Rag8 36.Rxf3 Rg1+ 37.Ke2 Ke7 38.Rh6 Rb1 39.Rh7+ Kf6 40.
Rxb7 Rgg1 41.Kd3 Rgd1+ 42.Kc2 Rbc1+ 43.Kb3 Rd5 44.Rxa7 Rb5+ 45.Ka3 Rc2 46.
b3 Re5 47.Kb4 Re4+ 48.c4 f4 49.Ra5 h4 50.a4 Ke6 51.Rd5 Rc1 52.a5 Rg1 53.
Rh5 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.02"]
[Round "12"]
[White "Boersma, Paulus"]
[Black "Van Wijgerden, Cornelis"]
[Result "1/2-1/2"]
[WhiteElo "2350"]
[BlackElo "2430"]
[EventDate "1977.04.18"]
[PlyCount "52"]
[ECO "B08"]

1.e4 g6 2.d4 Bg7 3.Nf3 d6 4.Be2 Nf6 5.Nc3 O-O 6.O-O c6 7.a4 Qc7 8.Be3 Ng4 
9.Bg5 f6 10.Bd2 Nh6 11.Qc1 Nf7 12.a5 e5 13.dxe5 dxe5 14.Bc4 Qe7 15.Be3 Be6
16.Bc5 Qxc5 17.Bxe6 Na6 18.Ne2 Rad8 19.c3 Qb5 20.Qc2 Nc5 21.Ba2 Qd3 22.
Qxd3 Rxd3 23.Rfd1 Rfd8 24.Rxd3 Rxd3 25.Ng3 Kf8 26.Kf1 Ke7 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.02"]
[Round "12"]
[White "Donner, Jan"]
[Black "Van Baarle, John"]
[Result "0-1"]
[WhiteElo "2470"]
[BlackElo "2325"]
[EventDate "1977.04.18"]
[PlyCount "46"]
[ECO "D32"]

1.d4 e6 2.c4 d5 3.Nc3 c5 4.cxd5 cxd4 5.Qa4+ Bd7 6.Qxd4 exd5 7.Qxd5 Nc6 8.
Qd1 Nf6 9.Nf3 Bc5 10.e3 Qe7 11.Be2 O-O-O 12.Bd2 g5 13.Qc1 g4 14.Nd4 Kb8 
15.O-O h5 16.Re1 h4 17.Nxc6+ Bxc6 18.e4 Rxd2 19.Qxd2 Qe5 20.Rad1 g3 21.Rf1
h3 22.Bf3 hxg2 23.Bxg2 gxf2+ 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.02"]
[Round "12"]
[White "Hofland, Leonard"]
[Black "Hartoch, Robert"]
[Result "1/2-1/2"]
[BlackElo "2405"]
[EventDate "1977.04.18"]
[PlyCount "212"]
[ECO "A25"]

1.c4 g6 2.Nc3 Bg7 3.g3 e5 4.Bg2 d6 5.d3 f5 6.e3 Nf6 7.Nge2 O-O 8.O-O Nc6 
9.Rb1 g5 10.f4 h6 11.b4 Ne7 12.e4 gxf4 13.gxf4 fxe4 14.dxe4 exf4 15.Bxf4 
Ng6 16.Qd2 Kh7 17.Ng3 Ng4 18.Nf5 Nxf4 19.Qxf4 h5 20.Qg3 Be5 21.Qh3 Qg5 22.
Ne2 Bxf5 23.exf5 Rae8 24.Ng3 Bd4+ 25.Kh1 Nf2+ 26.Rxf2 Bxf2 27.Nxh5 Qh4 28.
Nf4 Re3 29.Qxh4+ Bxh4 30.Nd5 Re2 31.Rf1 c6 32.Nf4 Re1 33.Rxe1 Bxe1 34.Ne6 
Rc8 35.b5 Bc3 36.Be4 Bf6 37.Kg2 cxb5 38.cxb5 Rc4 39.Bxb7 Rc2+ 40.Kf3 Rxa2 
41.h3 Kg8 42.Nc7 Kf8 43.Nd5 Kg7 44.Bc8 Ra3+ 45.Ke4 Ra4+ 46.Kf3 Ra3+ 47.Ke4
Rxh3 48.b6 Rh4+ 49.Kf3 axb6 50.Nxb6 Kh6 51.Nd5 Kg5 52.Be6 Ra4 53.Ke3 Ra1 
54.Kf3 Bd4 55.Ke4 Bc5 56.Kd3 Ra4 57.Kd2 Bd4 58.Kd3 Bg7 59.Ke3 Kh4 60.Kf3 
Bh6 61.Ne7 Rf4+ 62.Ke2 Kg3 63.Kd3 Ra4 64.Nd5 Kf3 65.Nb6 Ra3+ 66.Kc4 Ke4 
67.Nd7 Bg5 68.Nb6 Ra5 69.Nd7 d5+ 70.Kb4 Bd2+ 71.Kb3 d4 72.f6 Bh6 73.f7 d3 
74.f8=Q Bxf8 75.Nxf8 Rb5+ 76.Kc3 Rc5+ 77.Kb4 d2 78.Bg4 Rg5 79.Bd1 Rg1 80.
Bc2+ Ke3 81.Ne6 Rc1 82.Kb3 Rb1+ 83.Kc3 Rb5 84.Kc4 Rb8 85.Bd1 Rb1 86.Bc2 
Rb6 87.Nd4 Rb8 88.Nf5+ Ke2 89.Nd4+ Ke3 90.Nf5+ Kf2 91.Nd4 Rf8 92.Kd3 Ke1 
93.Ke3 Re8+ 94.Kd3 Rd8 95.Ke3 Re8+ 96.Kd3 Rf8 97.Ke3 d1=Q 98.Bxd1 Kxd1 99.
Ke4 Kd2 100.Nf3+ Kc3 101.Ne5 Re8 102.Kd5 Kb4 103.Nc6+ Kb5 104.Nd4+ Kb6 
105.Ne6 Rh8 106.Ke5 Rh5+ 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.02"]
[Round "12"]
[White "Langeweg, Christian"]
[Black "Bohm, Hans"]
[Result "0-1"]
[WhiteElo "2445"]
[BlackElo "2445"]
[EventDate "1977.04.18"]
[PlyCount "68"]
[ECO "A09"]

1.Nf3 d5 2.c4 d4 3.d3 Nc6 4.g3 e5 5.Bg2 Bd6 6.O-O Nge7 7.Na3 O-O 8.Nc2 a5 
9.a3 b6 10.b3 Bf5 11.Rb1 Qd7 12.Re1 h6 13.b4 Rae8 14.e3 dxe3 15.Bxe3 Ng6 
16.Qd2 Be7 17.Red1 Rd8 18.Nfe1 Bg4 19.Rdc1 f5 20.Bd5+ Kh7 21.b5 Nb8 22.f4 
exf4 23.gxf4 Bd6 24.d4 Rfe8 25.Nd3 Qe7 26.Rb3 Nd7 27.Ne5 Nf6 28.Nc6 Qd7 
29.Nxd8 Nxd5 30.cxd5 Qxd8 31.Rf1 Re4 32.Ne1 Qa8 33.Nf3 Qxd5 34.Rd3 Bxf4 
0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.02"]
[Round "12"]
[White "Ligterink, Gert"]
[Black "Timman, Jan"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[BlackElo "2590"]
[EventDate "1977.04.18"]
[PlyCount "47"]
[ECO "B08"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Bf4 O-O 6.Qd2 Bg4 7.O-O-O Bxf3 8.
gxf3 Nc6 9.Bh6 e5 10.Bxg7 Kxg7 11.d5 Nd4 12.f4 Nh5 13.fxe5 dxe5 14.Qe3 Qf6
15.Kb1 c6 16.Ne2 Nxe2 17.Bxe2 Nf4 18.Bc4 Rfd8 19.Rd2 b5 20.Bb3 Qd6 21.c4 
bxc4 22.Bxc4 Rab8 23.Rc1 c5 24.Rdc2 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.02"]
[Round "12"]
[White "Van der Sterren, Paul"]
[Black "Ree, Hans"]
[Result "1/2-1/2"]
[WhiteElo "2375"]
[BlackElo "2460"]
[EventDate "1977.04.18"]
[PlyCount "157"]
[ECO "C76"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 g6 5.c3 d6 6.d4 Bd7 7.O-O Bg7 8.dxe5 dxe5
9.Be3 Nf6 10.Nbd2 O-O 11.Bc5 Re8 12.Qe2 Bf8 13.Bxf8 Kxf8 14.Ne1 Nd4 15.
cxd4 Bxa4 16.d5 c6 17.dxc6 Bxc6 18.Nef3 Qe7 19.b3 a5 20.a4 Qb4 21.Rfe1 
Rad8 22.Rac1 Kg7 23.Qe3 Nd7 24.Qc3 Qxc3 25.Rxc3 f6 26.Nc4 Ra8 27.Nfd2 Red8
28.Nf1 Nf8 29.f3 Ne6 30.Nfe3 Nd4 31.Kf2 Kf7 32.Rd1 Ke7 33.Nc2 Nxc2 34.Rxd8
Kxd8 35.Rxc2 Kc7 36.h4 b6 37.g4 Re8 38.g5 f5 39.exf5 gxf5 40.Re2 e4 41.f4 
Bd5 42.Rb2 h6 43.Ke3 Rd8 44.Ne5 Kd6 45.Rd2 Ke6 46.Nc6 Rf8 47.Nd4+ Ke7 48.
g6 Kf6 49.h5 Be6 50.Rc2 Rc8 51.Rxc8 Bxc8 52.Kd2 Be6 53.Kc3 Bd5 54.Nc2 Be6 
55.Ne3 Bg8 56.Nc2 Be6 57.Nd4 Bd5 58.b4 Be6 59.Nc6 Bd7 60.b5 Be6 61.Nb8 Kg7
62.Kc2 e3 63.Nc6 Bb3+ 64.Kd3 Bxa4 65.Nd4 Bd1 66.Nxf5+ Kf6 67.g7 Bb3 68.
Nxh6 Kxg7 69.Nf5+ Kh7 70.Kxe3 Bf7 71.h6 Be6 72.Nd4 Bc4 73.Ke4 a4 74.Nc2 
Bxb5 75.Kd4 Kxh6 76.Kc3 Kg6 77.Kb4 Be8 78.Ne3 b5 79.Nc4 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.02"]
[Round "12"]
[White "Van der Vliet, Fredrik"]
[Black "Kortschnoj, Viktor"]
[Result "0-1"]
[WhiteElo "2340"]
[BlackElo "2645"]
[EventDate "1977.04.18"]
[PlyCount "140"]
[ECO "D77"]

1.Nf3 Nf6 2.g3 d5 3.Bg2 g6 4.d4 Bg7 5.O-O O-O 6.c4 dxc4 7.Na3 Nc6 8.Nxc4 
Be6 9.b3 Bd5 10.Bb2 Qc8 11.e3 Rd8 12.Qe2 h6 13.Rac1 Qe6 14.Rfe1 Rac8 15.a3
Ne4 16.Red1 Nd6 17.Ne1 Nf5 18.Bxd5 Rxd5 19.Qc2 Nd6 20.Nd3 g5 21.Nd2 Qg6 
22.Nc5 Qxc2 23.Rxc2 e5 24.Nxb7 Nxb7 25.Rxc6 exd4 26.e4 Rc5 27.Rc1 Rxc1+ 
28.Rxc1 c5 29.b4 Rb8 30.Nb3 cxb4 31.axb4 Nd6 32.Bxd4 Rxb4 33.Bc5 Rxb3 34.
Bxd6 Bc3 35.Rc2 g4 36.Ra2 a5 37.Kg2 h5 38.Bc7 Rb7 39.Bd8 Rd7 40.Bb6 Rd6 
41.Bc5 Rc6 42.Be7 Re6 43.Bd8 Ra6 44.Ra4 Bb4 45.h3 Kf8 46.hxg4 hxg4 47.f3 
Ke8 48.Bc7 Kd7 49.Be5 gxf3+ 50.Kxf3 Kc6 51.Ra1 Kb5 52.Ke3 Re6 53.Bd4 a4 
54.Rf1 Re7 55.Kd3 a3 56.Bf6 Rb7 57.Kc2 Ka4 58.g4 Ba5 59.Bh8 Rc7+ 60.Kb1 
Kb3 61.Rf3+ Rc3 62.Rf1 Re3 63.Ka1 Re1+ 64.Rxe1 Bxe1 65.g5 Bd2 66.g6 fxg6 
67.Bd4 g5 68.e5 Bb4 69.Kb1 a2+ 70.Ka1 g4 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.04"]
[Round "13"]
[White "Bohm, Hans"]
[Black "Van der Sterren, Paul"]
[Result "1/2-1/2"]
[WhiteElo "2445"]
[BlackElo "2375"]
[EventDate "1977.04.18"]
[PlyCount "94"]
[ECO "A00"]

1.e4 c5 2.g3 g6 3.Bg2 Bg7 4.h4 h5 5.Ne2 Nc6 6.O-O e6 7.c3 Nge7 8.d3 O-O 9.
Bg5 d5 10.Nd2 d4 11.Nb3 b6 12.cxd4 cxd4 13.e5 Bd7 14.Nbxd4 Rc8 15.Nxc6 
Bxc6 16.Bxc6 Rxc6 17.Qa4 Rc7 18.Rac1 Bxe5 19.Rxc7 Qxc7 20.Rc1 Qb7 21.Qe4 
Qxe4 22.dxe4 f6 23.Be3 Rc8 24.Rxc8+ Nxc8 25.b3 Kf7 26.Kf1 Nd6 27.f3 f5 28.
exf5 exf5 29.Ke1 Ke6 30.Kd2 Kd5 31.Kd3 Nb7 32.Bf4 Nc5+ 33.Ke3 Ne6 34.a4 a6
35.Bxe5 Kxe5 36.b4 a5 37.b5 Nc5 38.Nf4 Nxa4 39.Nxg6+ Kf6 40.Nf4 Nc3 41.
Nxh5+ Kf7 42.Nf4 a4 43.Kd3 Nxb5 44.Nd5 a3 45.Nb4 Kg6 46.Kc4 Nd6+ 47.Kb3 
Nb5 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.04"]
[Round "13"]
[White "Hartoch, Robert"]
[Black "Ligterink, Gert"]
[Result "1-0"]
[WhiteElo "2405"]
[BlackElo "2430"]
[EventDate "1977.04.18"]
[PlyCount "47"]
[ECO "A36"]

1.g3 g6 2.Bg2 Bg7 3.e4 c5 4.Ne2 Nc6 5.c4 Nf6 6.Nbc3 O-O 7.O-O d6 8.d3 Ne8 
9.Be3 Nd4 10.Rb1 Nc7 11.b4 Rb8 12.Qd2 Bd7 13.f4 b5 14.a3 a5 15.bxc5 dxc5 
16.e5 Bf5 17.Bxd4 cxd4 18.Nxb5 Ne6 19.Na7 Rxb1 20.Rxb1 Nc5 21.Nc1 a4 22.
Rb5 Qc7 23.Nc6 Ne6 24.Qb4 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.04"]
[Round "13"]
[White "Kortschnoj, Viktor"]
[Black "Hofland, Leonard"]
[Result "1-0"]
[WhiteElo "2645"]
[EventDate "1977.04.18"]
[PlyCount "59"]
[ECO "A28"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.e3 Bb4 5.Qc2 O-O 6.Nd5 Re8 7.Qf5 d6 8.Nxf6+ 
Qxf6 9.Qxf6 gxf6 10.a3 Ba5 11.b4 Bb6 12.d3 Ne7 13.Nd2 f5 14.Bb2 f6 15.Be2 
c6 16.O-O Be6 17.d4 Bc7 18.Rac1 Rac8 19.Rfd1 Bb8 20.Nb3 Bf7 21.a4 b6 22.
Rd2 d5 23.c5 f4 24.exf4 exd4 25.g3 bxc5 26.Nxc5 Bd6 27.Bxd4 Nf5 28.Bxf6 
Rb8 29.b5 Bxc5 30.Rxc5 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.04"]
[Round "13"]
[White "Ree, Hans"]
[Black "Boersma, Paulus"]
[Result "1-0"]
[WhiteElo "2460"]
[BlackElo "2350"]
[EventDate "1977.04.18"]
[PlyCount "47"]
[ECO "E83"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 a6 7.Qd2 Nc6 8.Nge2 Re8 
9.h4 h5 10.O-O-O b5 11.Nf4 Bd7 12.c5 dxc5 13.dxc5 Qb8 14.g4 Bxg4 15.fxg4 
Nxg4 16.Bh3 Nxe3 17.Qxe3 Ne5 18.Nxh5 gxh5 19.Rhg1 c6 20.Qh6 Ng4 21.Qxh5 
Qf4+ 22.Kb1 Ne5 23.Rdf1 Qh2 24.Qh6 1-0

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.04"]
[Round "13"]
[White "Timman, Jan"]
[Black "Donner, Jan"]
[Result "0-1"]
[WhiteElo "2590"]
[BlackElo "2470"]
[EventDate "1977.04.18"]
[PlyCount "72"]
[ECO "B09"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Bd3 Nc6 7.O-O Bg4 8.e5 dxe5
9.dxe5 Nd5 10.h3 Nxc3 11.bxc3 Bxf3 12.Qxf3 Na5 13.Rd1 Qc8 14.c4 c5 15.Bb2 
f6 16.f5 fxe5 17.Qd5+ e6 18.Qxe6+ Qxe6 19.fxe6 Rfe8 20.Be4 Nxc4 21.Bc1 
Rab8 22.Rb1 Nb6 23.Rd3 Rxe6 24.Ra3 Rd6 25.Be3 Nc4 26.Bxc5 Nxa3 27.Bxd6 
Nxb1 28.Bxb8 Nc3 29.Bxb7 a5 30.Kf2 Kf7 31.Bc7 a4 32.Ba5 e4 33.Ke3 Ke6 34.
Bxe4 Nxa2 35.Kd3 a3 36.Kc4 Nb4 0-1

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.04"]
[Round "13"]
[White "Van Baarle, John"]
[Black "Langeweg, Christian"]
[Result "1/2-1/2"]
[WhiteElo "2325"]
[BlackElo "2445"]
[EventDate "1977.04.18"]
[PlyCount "81"]
[ECO "A43"]

1.e4 e6 2.d4 c5 3.d5 exd5 4.exd5 d6 5.Nf3 Nf6 6.Bd3 Be7 7.O-O O-O 8.h3 Na6
9.c4 Nc7 10.Nc3 a6 11.a4 b6 12.Re1 Rb8 13.Bg5 h6 14.Bf4 b5 15.Qd2 bxc4 16.
Bxc4 Bf5 17.Re2 Re8 18.Rae1 Bf8 19.Rxe8 Nfxe8 20.g4 Bg6 21.Qe2 h5 22.Bg5 
Qd7 23.Nh4 Bh7 24.b3 hxg4 25.hxg4 Bc2 26.Qf3 Bxb3 27.Bd3 g6 28.Nf5 f6 29.
Nh6+ Bxh6 30.Bxh6 Rb4 31.Bf4 Qf7 32.Qg3 Nxd5 33.Bxd6 Nxd6 34.Qxd6 Rxg4+ 
35.Kf1 Nxc3 36.Qxc5 Rxa4 37.Qxc3 Bc4 38.Bxc4 Rxc4 39.Qd3 Rc7 40.Qxa6 Kg7 
41.Qe6 1/2-1/2

[Event "33rd NED-ch"]
[Site "Leeuwarden NED"]
[Date "1977.05.04"]
[Round "13"]
[White "Van Wijgerden, Cornelis"]
[Black "Van der Vliet, Fredrik"]
[Result "1/2-1/2"]
[WhiteElo "2430"]
[BlackElo "2340"]
[EventDate "1977.04.18"]
[PlyCount "30"]
[ECO "C15"]

1.e4 e6 2.Nc3 d5 3.d4 Bb4 4.Qg4 Nf6 5.Qxg7 Rg8 6.Qh6 dxe4 7.Ne2 b6 8.Bg5 
Nbd7 9.Ng3 Rg6 10.Qh4 Bb7 11.Bb5 Be7 12.Qf4 Nh5 13.Bxe7 Nxf4 14.Bxd8 Rxd8 
15.Rg1 Ke7 1/2-1/2
