[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.17"]
[Round "1"]
[White "Botvinnik, Mikhail"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "A05"]
[EventDate "1970.04.17"]
[PlyCount "82"]

1.Nf3 Nf6 2.g3 g6 3.Bg2 Bg7 4.O-O O-O 5.d3 c5 6.e4 Nc6 7.Nbd2 d5 8.Re1 b6 
9.c3 dxe4 10.dxe4 Ng4 11.Bf1 Nge5 12.Qc2 Bb7 13.Nxe5 Nxe5 14.f4 Nd7 15.Bg2
Qc7 16.Nf1 Rad8 17.Be3 c4 18.Rad1 Nc5 19.Bxc5 Qxc5+ 20.Qf2 Qxf2+ 21.Kxf2 
e5 22.Ne3 b5 23.f5 Rfe8 24.h4 Bf6 25.Ke2 Be7 26.Rf1 Kg7 27.Rxd8 Rxd8 28.
Nd5 Bxd5 29.exd5 Rb8 30.Be4 Rb6 31.Kd2 a5 32.b3 a4 33.bxc4 bxc4 34.Rb1 
Rxb1 35.Bxb1 h5 36.fxg6 fxg6 37.Bc2 a3 38.Ke2 Kf6 39.Kf3 Bd6 40.Ke4 Bc7 
41.Bd1 Ba5 1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.17"]
[Round "1"]
[White "Larsen, Bent"]
[Black "Spassky, Boris"]
[Result "1/2-1/2"]
[ECO "A01"]
[EventDate "1970.04.17"]
[PlyCount "67"]

1.b3 e5 2.Bb2 Nc6 3.c4 Nf6 4.e3 d5 5.cxd5 Nxd5 6.a3 Bd6 7.Qc2 O-O 8.Nf3 
Qe7 9.Nc3 Nxc3 10.Qxc3 f5 11.Bb5 e4 12.Bxc6 bxc6 13.Ne5 c5 14.b4 cxb4 15.
axb4 Bb7 16.Ra4 a6 17.O-O f4 18.exf4 Rxf4 19.b5 axb5 20.Rxa8+ Bxa8 21.Qb3+
Kh8 22.Qxb5 Rf8 23.h3 Qe8 24.Qxe8 Rxe8 25.Nf7+ Kg8 26.Nxd6 cxd6 27.Ra1 Bb7
28.Kh2 Kf7 29.Ra5 g6 30.h4 Ke6 31.Kg3 Ra8 32.Rb5 Bc6 33.Rb6 Kd5 34.Bc3 
1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.19"]
[Round "2"]
[White "Larsen, Bent"]
[Black "Botvinnik, Mikhail"]
[Result "1-0"]
[ECO "A28"]
[EventDate "1970.04.17"]
[PlyCount "109"]

1.c4 e5 2.Nc3 Nc6 3.a3 Nf6 4.Nf3 d5 5.cxd5 Nxd5 6.d3 Be7 7.e3 O-O 8.Be2 
Be6 9.Bd2 f6 10.b4 Nxc3 11.Bxc3 Bd6 12.O-O Qd7 13.Qc2 a6 14.Rfd1 Qf7 15.
Rab1 Rfd8 16.a4 Ne7 17.e4 Nc6 18.g3 Bf8 19.b5 axb5 20.axb5 Nd4 21.Bxd4 
exd4 22.Nd2 Ra2 23.Rb2 Ra3 24.Nc4 Rc3 25.Qd2 Bc5 26.Bf1 Kh8 27.Rbb1 Qe7 
28.Qf4 Bxc4 29.dxc4 d3 30.Rd2 Rxc4 31.Rxd3 Rc2 32.Rf3 Rdd2 33.Ra1 Qd8 34.
Kh1 Bxf2 35.Rd3 Rxd3 36.Bxd3 Rb2 37.Qxc7 Qg8 38.Qxb7 Ra2 39.Rc1 Ra8 40.Rc7
Rb8 41.Qd5 Bb6 42.Rc6 Qf8 43.Qf5 Qg8 44.Kg2 Bd4 45.Qd5 Bb6 46.h4 Qf8 47.e5
fxe5 48.Qe4 Qg8 49.Rh6 gxh6 50.Qxe5+ Qg7 51.Qxb8+ Qg8 52.Qxb6 Qd5+ 53.Kh2 
Qxd3 54.Qf6+ Kg8 55.Qb2 1-0

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.19"]
[Round "2"]
[White "Spassky, Boris"]
[Black "Donner, Jan"]
[Result "1-0"]
[ECO "C11"]
[EventDate "1970.04.17"]
[PlyCount "51"]

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 dxe4 5.Nxe4 Be7 6.Bxf6 Bxf6 7.Nf3 Bd7 8.
Qd2 Bc6 9.Nxf6+ Qxf6 10.Ne5 O-O 11.O-O-O Rd8 12.Qe3 Be8 13.g3 Nd7 14.Bg2 
c6 15.f4 Qe7 16.h4 f6 17.Nf3 Bh5 18.Bh3 Bxf3 19.Qxf3 Nf8 20.Rhe1 Qf7 21.
Bf1 Rd6 22.Bc4 Rad8 23.f5 Rxd4 24.fxe6 Rxd1+ 25.Rxd1 Rxd1+ 26.Qxd1 1-0

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.21"]
[Round "3"]
[White "Botvinnik, Mikhail"]
[Black "Spassky, Boris"]
[Result "1/2-1/2"]
[ECO "D31"]
[EventDate "1970.04.17"]
[PlyCount "50"]

1.c4 e6 2.Nc3 d5 3.d4 Be7 4.Bf4 c6 5.cxd5 exd5 6.e3 Bf5 7.g4 Be6 8.h4 Nd7 
9.h5 Qb6 10.Rb1 Ngf6 11.f3 h6 12.Bd3 Qa5 13.Ne2 b5 14.Nc1 Qd8 15.Nb3 O-O 
16.Ne2 a5 17.Ng3 a4 18.Nc1 c5 19.Nf5 Bxf5 20.Bxf5 cxd4 21.exd4 Qb6 22.Ne2 
Bd6 23.Qd2 Bxf4 24.Nxf4 Rfe8+ 25.Kf1 Nb8 1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.21"]
[Round "3"]
[White "Donner, Jan"]
[Black "Larsen, Bent"]
[Result "1-0"]
[ECO "A43"]
[EventDate "1970.04.17"]
[PlyCount "45"]

1.d4 c5 2.d5 d6 3.e4 Nf6 4.Bd3 g6 5.Ne2 Bg7 6.O-O O-O 7.c4 e6 8.Nec3 exd5 
9.cxd5 Nbd7 10.Nd2 a6 11.a4 Nh5 12.f4 Bd4+ 13.Kh1 Ndf6 14.Nf3 Re8 15.f5 
gxf5 16.exf5 Kh8 17.Nxd4 cxd4 18.Ne4 Nxe4 19.Qxh5 Qf6 20.Bh6 Bd7 21.Rf4 
Nc5 22.Bg5 Qe5 23.Qh6 1-0

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.23"]
[Round "4"]
[White "Donner, Jan"]
[Black "Botvinnik, Mikhail"]
[Result "1/2-1/2"]
[ECO "A84"]
[EventDate "1970.04.17"]
[PlyCount "55"]

1.d4 e6 2.c4 f5 3.e3 Nf6 4.Bd3 d5 5.Nf3 Be7 6.O-O O-O 7.b3 Ne4 8.Ba3 Nc6 
9.Bxe7 Qxe7 10.Qc1 Bd7 11.Nc3 Nxc3 12.Qxc3 Be8 13.Ne1 f4 14.e4 e5 15.exd5 
Nxd4 16.Nc2 c5 17.f3 Qf6 18.Nxd4 exd4 19.Qc2 g6 20.Rae1 Bd7 21.Re4 Bf5 22.
Re2 Rae8 23.Be4 Re5 24.Rfe1 Rfe8 25.Bxf5 gxf5 26.Rxe5 Rxe5 27.Rxe5 Qxe5 
28.Qd2 1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.23"]
[Round "4"]
[White "Spassky, Boris"]
[Black "Larsen, Bent"]
[Result "1/2-1/2"]
[ECO "B80"]
[EventDate "1970.04.17"]
[PlyCount "82"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bd3 Nc6 7.Nb3 a6 8.O-O b5
9.f4 Qb6+ 10.Kh1 Bb7 11.Qe2 Be7 12.a4 b4 13.Nb1 O-O 14.a5 Qc7 15.Be3 e5 
16.f5 d5 17.Bb6 Qd7 18.N1d2 Nd4 19.Bxd4 dxe4 20.Nxe4 exd4 21.Nxf6+ Bxf6 
22.Nc5 Qc7 23.Nxb7 Qxb7 24.Rfe1 Ra7 25.Qe4 Qd7 26.Qf4 h6 27.Re4 Qd5 28.b3 
Qc5 29.h4 Re7 30.g3 Re5 31.Rxe5 Bxe5 32.Qf2 Qc6+ 33.Kh2 Qf6 34.Kg2 Bc7 35.
Re1 Bxa5 36.Qf4 Bd8 37.Qe5 Qb6 38.Qd5 Bf6 39.Qd7 Qb8 40.Bc4 Be5 41.f6 Bxf6
1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.25"]
[Round "5"]
[White "Botvinnik, Mikhail"]
[Black "Larsen, Bent"]
[Result "1-0"]
[ECO "E81"]
[EventDate "1970.04.17"]
[PlyCount "149"]

1.c4 g6 2.Nc3 Bg7 3.d4 d6 4.e4 Nf6 5.f3 O-O 6.Be3 a6 7.Qd2 c6 8.Bd3 b5 9.
Nge2 Nbd7 10.O-O Rb8 11.cxb5 axb5 12.b4 Nb6 13.a4 bxa4 14.Nxa4 Nxa4 15.
Rxa4 Bd7 16.Ra5 Qb6 17.Rb1 Rfc8 18.Nc3 Qd8 19.Qa2 Be6 20.Qa3 d5 21.e5 Nd7 
22.Na4 Bf5 23.Bxf5 gxf5 24.Ra6 Rc7 25.Rc1 Qc8 26.Ra5 e6 27.Bd2 Bf8 28.f4 
Kh8 29.Nc5 Nxc5 30.dxc5 Qd8 31.Qd3 Qd7 32.Rca1 Rcb7 33.Ra8 Qc8 34.Rxb8 
Qxb8 35.Qa3 Kg8 36.Qa4 Qc7 37.Ra3 h6 38.Qa8 Rb8 39.Qa5 Qc8 40.Qa6 Be7 41.
Qxc8+ Rxc8 42.Kf2 Kf8 43.Kf3 h5 44.Ke2 Kg7 45.Be1 Kg6 46.Ra7 Bd8 47.Bc3 h4
48.Kd3 h3 49.gxh3 Bh4 50.Ke2 Bd8 51.Kf3 Bh4 52.Kg2 Rd8 53.Kf3 Rc8 54.Ke2 
Bd8 55.Be1 f6 56.Kf3 fxe5 57.fxe5 Rc7 58.Ra8 Bg5 59.Rg8+ Kh5 60.h4 Bh6 61.
Rh8 Kg6 62.h5+ Kg7 63.Ra8 Bg5 64.Ra6 Rc8 65.b5 cxb5 66.Rxe6 Bc1 67.Bb4 d4 
68.Rg6+ Kh7 69.Rd6 Bb2 70.Rd7+ Kg8 71.e6 Bc3 72.e7 Re8 73.Rd8 Kf7 74.Rxe8 
Kxe8 75.c6 1-0

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.25"]
[Round "5"]
[White "Donner, Jan"]
[Black "Spassky, Boris"]
[Result "1/2-1/2"]
[ECO "A61"]
[EventDate "1970.04.17"]
[PlyCount "48"]

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Nd2 Bg7 8.Nc4 O-O
9.Bf4 Ne8 10.Qd2 b6 11.e3 Ba6 12.a4 Bxc4 13.Bxc4 Nd7 14.O-O Ne5 15.Be2 f5 
16.e4 a6 17.exf5 gxf5 18.Bg3 Qd7 19.f4 Ng6 20.Rab1 Ra7 21.b4 Bxc3 22.Qxc3 
Qxa4 23.bxc5 bxc5 24.Ra1 Qd7 1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.26"]
[Round "6"]
[White "Spassky, Boris"]
[Black "Botvinnik, Mikhail"]
[Result "1/2-1/2"]
[ECO "B19"]
[EventDate "1970.04.17"]
[PlyCount "130"]

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.Nf3 Nd7 7.h4 h6 8.h5 Bh7
9.Bd3 Bxd3 10.Qxd3 Qc7 11.Rh4 e6 12.Bf4 Bd6 13.Bxd6 Qxd6 14.Ne4 Qb4+ 15.
Qc3 Qxc3+ 16.bxc3 Ke7 17.Nc5 Ngf6 18.Nxb7 Rhc8 19.Ne5 c5 20.Na5 Rc7 21.
O-O-O Rac8 22.Nxd7 Nxd7 23.d5 exd5 24.Rxd5 Nb6 25.Re5+ Kf8 26.Nb3 c4 27.
Nd4 Rc5 28.Rhe4 Nd7 29.Rf5 Rxf5 30.Nxf5 Rc5 31.g4 g6 32.hxg6 fxg6 33.Nxh6 
Nf6 34.Re6 Kg7 35.f4 Nh7 36.f5 Nf8 37.Re8 Ra5 38.Kd2 Kxh6 39.Rxf8 Kg7 40.
Rc8 gxf5 41.gxf5 Rxa2 42.Ke3 Kf6 43.Ke4 Rxc2 44.Rc6+ Kf7 45.Rxc4 a5 46.
Rc7+ Kf6 47.Rc6+ Kf7 48.Kd4 Rf2 49.Ke5 Re2+ 50.Kd5 Rf2 51.Rc7+ Kf6 52.Ra7 
Ra2 53.c4 a4 54.c5 a3 55.c6 Rd2+ 56.Kc5 Rc2+ 57.Kd6 Rd2+ 58.Kc7 a2 59.Ra5 
Rc2 60.Kd7 Rd2+ 61.Kc8 Rc2 62.c7 Rd2 63.Kb7 Rb2+ 64.Kc6 Rc2+ 65.Kd7 Rd2+ 
1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.26"]
[Round "6"]
[White "Larsen, Bent"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "E64"]
[EventDate "1970.04.17"]
[PlyCount "94"]

1.g3 g6 2.Bg2 Bg7 3.c4 Nf6 4.Nc3 O-O 5.d4 c5 6.d5 d6 7.Nf3 Na6 8.O-O Nc7 
9.Re1 Rb8 10.a4 a6 11.a5 b5 12.axb6 Rxb6 13.Ra2 e6 14.dxe6 Nxe6 15.b3 Bd7 
16.Na4 Bxa4 17.Rxa4 d5 18.Qc2 Qb8 19.Ra3 Qb7 20.Rd1 Rb8 21.cxd5 Nxd5 22.
Ng5 Nb4 23.Qc4 Qe7 24.Nxe6 Qxe6 25.Bf4 Be5 26.Ra5 Bxf4 27.gxf4 Rb5 28.Rxb5
axb5 29.Qxc5 Qxe2 30.Qd6 Rb6 31.Qd8+ Kg7 32.Rd2 Qe1+ 33.Bf1 Rf6 34.Qd4 Nc6
35.Qb2 b4 36.h3 Qe6 37.Bg2 Ne7 38.Qe5 Qxe5 39.fxe5 Rf5 40.Rd4 g5 41.Rxb4 
Rxe5 42.f4 gxf4 43.Rxf4 Re1+ 44.Rf1 Rxf1+ 45.Kxf1 Kf6 46.Kf2 Ke5 47.Kg3 
Nf5+ 1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.28"]
[Round "7"]
[White "Botvinnik, Mikhail"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "D37"]
[EventDate "1970.04.17"]
[PlyCount "66"]

1.c4 Nf6 2.Nc3 e6 3.Nf3 d5 4.d4 Be7 5.Bf4 O-O 6.e3 c5 7.dxc5 Bxc5 8.a3 Nc6
9.Be2 dxc4 10.Bxc4 Qe7 11.O-O h6 12.Bg3 Nh5 13.Bh4 g5 14.Bg3 Nxg3 15.hxg3 
Bd7 16.Ne4 Rfd8 17.g4 Bb6 18.b4 Bc7 19.Qe2 Ne5 20.Nxe5 Bxe5 21.Rad1 Bc6 
22.Nc5 a5 23.Bb5 axb4 24.axb4 Bd6 25.Bxc6 bxc6 26.Qc4 Bxc5 27.bxc5 Rxd1 
28.Rxd1 Rd8 29.Rd4 Rd5 30.Rxd5 exd5 31.Qd4 Qe4 32.Qf6 Qe6 33.Qd4 Qe4 
1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.28"]
[Round "7"]
[White "Larsen, Bent"]
[Black "Spassky, Boris"]
[Result "0-1"]
[ECO "D27"]
[EventDate "1970.04.17"]
[PlyCount "48"]

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.a4 Nc6 8.Qe2 cxd4
9.Rd1 Be7 10.exd4 O-O 11.Nc3 Nd5 12.Ne5 Nxc3 13.bxc3 Nxe5 14.Qxe5 Bd6 15.
Qh5 Qc7 16.Rd3 Qxc4 17.Rh3 f6 18.Qxh7+ Kf7 19.Qh5+ Ke7 20.Qh7 Rf7 21.Ba3 
Bxa3 22.Rxa3 Bd7 23.Rg3 g5 24.Qb1 Bc6 0-1

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.30"]
[Round "8"]
[White "Larsen, Bent"]
[Black "Botvinnik, Mikhail"]
[Result "1/2-1/2"]
[ECO "B18"]
[EventDate "1970.04.17"]
[PlyCount "97"]

1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.Nf3 Nd7 7.Bc4 e6 8.Qe2 
Ngf6 9.O-O Be7 10.Rd1 Qc7 11.Ne5 Nxe5 12.dxe5 Nd5 13.Bb3 O-O-O 14.a3 Nb6 
15.Bf4 Rxd1+ 16.Rxd1 Rd8 17.Rxd8+ Qxd8 18.Be3 Kb8 19.Nh5 Nd5 20.Bd2 Bf8 
21.g3 Qb6 22.h4 Qd4 23.Bc1 Qe4 24.Qxe4 Bxe4 25.Kf1 Bf3 26.Nf4 Nxf4 27.Bxf4
Kc7 28.c3 b5 29.Ke1 c5 30.c4 Kc6 31.Kd2 Be7 32.Bg5 Bf8 33.Ke3 Bh5 34.a4 a6
35.f3 h6 36.Bd8 Bg6 37.g4 Kd7 38.Bb6 Kc6 39.a5 Be7 40.h5 Bb1 41.f4 g6 42.
Bd1 bxc4 43.Ba4+ Kd5 44.Bd1 Be4 45.Be2 gxh5 46.gxh5 Bg2 47.Ba7 Bh1 48.Bb8 
Bg2 49.Ba7 1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.04.30"]
[Round "8"]
[White "Spassky, Boris"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "B99"]
[EventDate "1970.04.17"]
[PlyCount "136"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 Qc7
9.O-O-O Nbd7 10.g4 b5 11.Bxf6 gxf6 12.f5 Ne5 13.Qh3 O-O 14.Nce2 Kh8 15.Nf4
Rg8 16.fxe6 fxe6 17.Nfxe6 Bxe6 18.Nxe6 Qd7 19.Nd4 Qxg4 20.Qxg4 Nxg4 21.Nf5
Nf2 22.Nxe7 Rge8 23.Nd5 Nxh1 24.Nc7 Nf2 25.Rd4 Rac8 26.Nxe8 Rxe8 27.Bg2 
Rg8 28.Bf3 Ng4 29.Rxd6 Nxh2 30.Be2 Rg2 31.Kd1 Ng4 32.Bxg4 Rxg4 33.Rxf6 
Rxe4 34.Rxa6 Kg7 35.Ra5 b4 36.Kd2 Kg6 37.Kd3 Rg4 38.Re5 h5 39.Ke3 Rg2 40.
Re4 b3 41.cxb3 Rxb2 42.Ra4 Kg5 43.Kf3 Kf5 44.Ra5+ Kg6 45.Ra8 Kf5 46.Rf8+ 
Kg5 47.Rg8+ Kf5 48.Rg2 Rb1 49.Rc2 Kg5 50.Rc5+ Kh4 51.Rb5 Rf1+ 52.Kg2 Ra1 
53.a4 Kg4 54.Rb4+ Kg5 55.Kf3 Rf1+ 56.Kg3 Rg1+ 57.Kf2 Ra1 58.Kf3 Rf1+ 59.
Kg2 Ra1 60.Rb8 h4 61.Kh2 Kg4 62.Rg8+ Kf4 63.Kg2 Ra3 64.Rb8 Ra1 65.Rb4+ Kg5
66.Kh2 Kh5 67.Kh3 Rh1+ 68.Kg2 Ra1 1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.05.02"]
[Round "9"]
[White "Botvinnik, Mikhail"]
[Black "Spassky, Boris"]
[Result "1/2-1/2"]
[ECO "A26"]
[EventDate "1970.04.17"]
[PlyCount "58"]

1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4 d6 6.d3 Nge7 7.Nge2 O-O 8.O-O Bd7
9.Nd5 Rb8 10.Bg5 f6 11.Be3 f5 12.Qd2 Nxd5 13.cxd5 Nd4 14.Nxd4 exd4 15.Bg5 
Qc8 16.Rac1 Rf7 17.Bh6 Bxh6 18.Qxh6 Bb5 19.Rfd1 c5 20.dxc6 bxc6 21.b3 c5 
22.e5 Qe6 23.exd6 Qxd6 24.Qf4 Qxf4 25.gxf4 Rc7 26.Bd5+ Kf8 27.Bc4 a5 28.
Bxb5 Rxb5 29.Rc4 Rb4 1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.05.02"]
[Round "9"]
[White "Donner, Jan"]
[Black "Larsen, Bent"]
[Result "1/2-1/2"]
[ECO "A95"]
[EventDate "1970.04.17"]
[PlyCount "85"]

1.d4 f5 2.g3 Nf6 3.Bg2 e6 4.Nf3 Be7 5.O-O O-O 6.c4 c6 7.Nc3 d5 8.Bg5 Nbd7 
9.Qd3 Ne4 10.Bxe7 Qxe7 11.Qe3 b6 12.Nxe4 fxe4 13.Nd2 Ba6 14.cxd5 cxd5 15.
f3 exf3 16.Nxf3 Nf6 17.Ne5 Qb4 18.b3 Rac8 19.Rac1 Rxc1 20.Rxc1 Rc8 21.
Rxc8+ Bxc8 22.Bf3 a5 23.Kg2 Bb7 24.Qf4 Qd6 25.g4 Qc7 26.h4 Ne8 27.g5 Qe7 
28.Bg4 Bc8 29.Nd3 Qd6 30.Kf3 Bd7 31.Ne5 Qe7 32.Qc1 Qd6 33.Qf4 Qe7 34.Qc1 
Qd6 35.Kg3 Nc7 36.Qf4 Be8 37.h5 Nb5 38.h6 Qe7 39.Nd3 Nd6 40.Qe5 Ne4+ 41.
Kf4 Bd7 42.hxg7 Bc8 43.Bf3 1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.05.03"]
[Round "10"]
[White "Donner, Jan"]
[Black "Botvinnik, Mikhail"]
[Result "1/2-1/2"]
[ECO "E91"]
[EventDate "1970.04.17"]
[PlyCount "94"]

1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 Nf6 5.Be2 O-O 6.Nf3 Bg4 7.O-O Nfd7 8.Be3 e6
9.Ne1 Bxe2 10.Qxe2 Nc6 11.Qd2 e5 12.d5 Nd4 13.Nc2 Nxc2 14.Qxc2 f5 15.f3 
Rf7 16.b4 Bf8 17.Rac1 Be7 18.Qd2 Nb6 19.Nd1 c5 20.dxc6 bxc6 21.Nb2 d5 22.
c5 d4 23.Bh6 Nd7 24.Nc4 f4 25.g3 Bg5 26.Bxg5 Qxg5 27.Kh1 Qe7 28.g4 Kg7 29.
Qd3 a6 30.a4 Ra7 31.Nd6 Rf8 32.Qc4 Rfa8 33.Rb1 Rc7 34.Rfc1 Raa7 35.Qe2 Ra8
36.Nc4 Raa7 37.Kg2 Qe6 38.Qd3 Rcb7 39.Qd2 Rc7 40.Rb2 Nb8 41.h4 Qe7 42.Rh1 
Qe6 43.Rc1 Qe7 44.Rh1 Qe6 45.Qd3 Nd7 46.Na5 Rc8 47.g5 h5 1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.05.03"]
[Round "10"]
[White "Spassky, Boris"]
[Black "Larsen, Bent"]
[Result "1/2-1/2"]
[ECO "A92"]
[EventDate "1970.04.17"]
[PlyCount "72"]

1.d4 f5 2.Nf3 e6 3.g3 Nf6 4.Bg2 Be7 5.O-O O-O 6.c4 c6 7.b3 a5 8.Nc3 d5 9.
Bb2 Nbd7 10.e3 Ne4 11.a4 Nxc3 12.Bxc3 b6 13.Ne5 Nxe5 14.dxe5 Ba6 15.Qe2 
Qc7 16.Rfd1 Rad8 17.Bb2 Bc5 18.Qc2 Rf7 19.Bf1 Qc8 20.cxd5 cxd5 21.Bxa6 
Qxa6 22.Rac1 Rc8 23.Qd3 Qxd3 24.Rxd3 g5 25.Bd4 Rfc7 26.Rdc3 g4 27.h4 Kf7 
28.Kf1 Ke8 29.Ke2 Kd7 30.Kd3 h5 31.R3c2 Rc6 32.Rc3 Bb4 33.Rxc6 Rxc6 34.
Rxc6 Kxc6 35.Ke2 b5 36.Kd3 Bf8 1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.05.05"]
[Round "11"]
[White "Botvinnik, Mikhail"]
[Black "Larsen, Bent"]
[Result "0-1"]
[ECO "A90"]
[EventDate "1970.04.17"]
[PlyCount "104"]

1.c4 f5 2.d4 Nf6 3.g3 e6 4.Bg2 Bb4+ 5.Nd2 O-O 6.Nf3 a5 7.O-O b6 8.Ne5 Ra7 
9.Nd3 Bb7 10.Nf3 Be7 11.b3 Ne4 12.Bb2 Bf6 13.a3 c5 14.e3 Nc6 15.Nfe5 cxd4 
16.exd4 Nxe5 17.dxe5 Be7 18.a4 Qc7 19.Qc2 Bc6 20.f3 Nc5 21.Nf4 Bg5 22.Ne2 
Be3+ 23.Kh1 f4 24.Nd4 fxg3 25.Nxc6 dxc6 26.hxg3 Qf7 27.Bh3 Rd8 28.Bc3 Rad7
29.Ra2 Rd3 30.b4 axb4 31.Bxb4 Qh5 32.Qh2 Qxe5 33.f4 Qe4+ 34.Qg2 Qxc4 35.
Bxc5 Bxc5 36.Qxc6 Re3 37.Raf2 Kh8 38.Qg2 h6 39.Bg4 Qxa4 40.Re2 e5 41.Ra2 
Qc4 42.Rc2 Qb4 43.Bf5 exf4 44.gxf4 Re1 45.Re2 Rxf1+ 46.Qxf1 Rf8 47.Be4 Qd4
48.Kg2 Qf6 49.f5 Qg5+ 50.Kh1 Qh4+ 51.Kg2 Rd8 52.Bc2 Rd4 0-1

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.05.05"]
[Round "11"]
[White "Donner, Jan"]
[Black "Spassky, Boris"]
[Result "1/2-1/2"]
[ECO "E41"]
[EventDate "1970.04.17"]
[PlyCount "62"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 b6 6.Ne2 Bb7 7.O-O d5 8.cxd5 exd5
9.a3 Bxc3 10.Nxc3 O-O 11.dxc5 bxc5 12.b4 Nbd7 13.Bb2 Qe7 14.bxc5 Nxc5 15.
Bc2 Ba6 16.Re1 Rab8 17.Rb1 Rfd8 18.Ne2 Nfe4 19.f3 Bxe2 20.Qxe2 Nd6 21.Bd4 
Rbc8 22.Rbc1 Nc4 23.a4 Qg5 24.Qf2 a5 25.h4 Qh6 26.Red1 Ne6 27.Bf5 Rb8 28.
Bxe6 fxe6 29.e4 Qf4 30.exd5 exd5 31.Rb1 Rb4 1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.05.07"]
[Round "12"]
[White "Spassky, Boris"]
[Black "Botvinnik, Mikhail"]
[Result "1/2-1/2"]
[ECO "B19"]
[EventDate "1970.04.17"]
[PlyCount "40"]

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7 8.h5 Bh7
9.Bd3 Bxd3 10.Qxd3 Qc7 11.Rh4 e6 12.Bf4 Bd6 13.Bxd6 Qxd6 14.Ne4 Qe7 15.
O-O-O Ngf6 16.Ned2 O-O-O 17.Nc4 Kb8 18.g3 Nb6 19.Na5 Nc8 20.Qe2 Nd6 
1/2-1/2

[Event "75th LSG anniversary"]
[Site "Oegstgeest NED"]
[Date "1970.05.07"]
[Round "12"]
[White "Larsen, Bent"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "C90"]
[EventDate "1970.04.17"]
[PlyCount "148"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 
9.a3 h6 10.d4 Re8 11.Nbd2 Bf8 12.Ba2 Bd7 13.Qb3 Qe7 14.Qc2 g6 15.b4 Kh7 
16.Bb2 Bg7 17.d5 Nd8 18.c4 bxc4 19.Nxc4 Nb7 20.Rac1 Rec8 21.Bb3 a5 22.Bc3 
a4 23.Ba2 Bb5 24.Ne3 c6 25.dxc6 Bxc6 26.Nd2 Nd8 27.Qd3 Ne6 28.g3 Rab8 29.
h4 Nd4 30.Bxd4 exd4 31.Nd5 Qd7 32.Qf3 Bxd5 33.exd5 Ng4 34.Nc4 Kg8 35.h5 
gxh5 36.Bb1 Re8 37.Bf5 Rxe1+ 38.Rxe1 Qc7 39.Bd3 Qd7 40.Qf4 Rd8 41.Kg2 Ne5 
42.Nb2 Qc7 43.Rc1 Qb7 44.Qe4 Rc8 45.Nc4 Nxc4 46.Rxc4 Rxc4 47.Qe8+ Bf8 48.
Bxc4 Qe7 49.Qxa4 Qe4+ 50.f3 Qe3 51.Qb3 Qd2+ 52.Kf1 Qc1+ 53.Kf2 h4 54.gxh4 
Be7 55.Ke2 Bxh4 56.a4 Be1 57.Kd3 Qe3+ 58.Kc2 Qd2+ 59.Kb1 Qxb4 60.Qxb4 Bxb4
61.Kc2 Kg7 62.Kd3 Bc3 63.Ke4 Kg6 64.f4 f5+ 65.Kf3 Kf6 66.Bf1 Bd2 67.Bh3 h5
68.Bf1 h4 69.Bd3 h3 70.Kf2 Be3+ 71.Kf1 Ke7 72.a5 Kd8 73.Bxf5 h2 74.Kg2 
Bxf4 1/2-1/2

