[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.06"]
[Round "1"]
[White "Debarnot, Roberto Luis"]
[Black "Andersson, Ulf"]
[Result "0-1"]
[WhiteElo "2380"]
[BlackElo "2565"]
[ECO "E55"]
[EventDate "1975.04.06"]
[PlyCount "84"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 O-O 6.Nf3 d5 7.O-O dxc4 8.Bxc4 
Nbd7 9.a3 cxd4 10.Qxd4 Bxc3 11.Qxc3 b6 12.b4 Bb7 13.Bb2 Rc8 14.Qb3 Qe7 15.
Rfd1 Ne4 16.Rd4 Rc7 17.Qd3 Ng5 18.Nxg5 Qxg5 19.Qf1 e5 20.f4 Qxg2+ 21.Qxg2 
Bxg2 22.Rd2 Rxc4 23.Rxg2 f6 24.Rd2 Rf7 25.Rad1 Rc7 26.Kg2 Re7 27.Kf3 Kf7 
28.h4 h5 29.f5 g6 30.fxg6+ Kxg6 31.e4 Kf7 32.Ke3 b5 33.Kf3 Nb6 34.Re1 Red7
35.Ree2 Rxd2 36.Rxd2 Nc4 37.Rc2 Rd7 38.Ke2 Ke6 39.a4 a6 40.axb5 axb5 41.
Bc3 Rg7 42.Kf3 Rg4 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.06"]
[Round "1"]
[White "Larsen, Bent"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[WhiteElo "2625"]
[BlackElo "2645"]
[ECO "E54"]
[EventDate "1975.04.06"]
[PlyCount "80"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 O-O 6.Nf3 d5 7.O-O dxc4 8.Bxc4 
cxd4 9.exd4 b6 10.Qb3 Bxc3 11.bxc3 Bb7 12.Ne5 Qc7 13.Ba3 Re8 14.Bb5 Nc6 
15.Bxc6 Bxc6 16.c4 Bb7 17.Rfd1 Rac8 18.Rac1 Nd7 19.Ng4 f5 20.Ne3 Nf6 21.f3
Qd7 22.Bb2 Bc6 23.Re1 f4 24.Nf1 b5 25.d5 exd5 26.cxb5 Bxb5 27.Bxf6 gxf6 
28.Rxe8+ Rxe8 29.Nd2 Kg7 30.Qb4 d4 31.Nb3 d3 32.Qxf4 Re5 33.h4 Qe7 34.Kh2 
Qd6 35.Nd4 Bd7 36.Rd1 Qa3 37.Qg3+ Kf7 38.f4 Rh5 39.f5 Bxf5 40.Qc7+ Qe7 
1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.06"]
[Round "1"]
[White "Tal, Mikhail"]
[Black "Bellon Lopez, Juan Manuel"]
[Result "1-0"]
[WhiteElo "2645"]
[BlackElo "2415"]
[ECO "B54"]
[EventDate "1975.04.06"]
[PlyCount "99"]

1.Nf3 c5 2.e4 e6 3.Nc3 a6 4.d4 cxd4 5.Nxd4 d6 6.Be2 Nd7 7.O-O b6 8.f4 Bb7 
9.Bf3 Qc7 10.Kh1 Be7 11.e5 dxe5 12.fxe5 O-O-O 13.Bxb7+ Qxb7 14.Qe2 Nxe5 
15.Nxe6 fxe6 16.Qxe5 Nf6 17.Qxe6+ Kb8 18.Bf4+ Ka8 19.Rad1 Rhe8 20.Rxd8+ 
Bxd8 21.Qd6 Be7 22.Qd3 Rd8 23.Qe2 Bb4 24.Nd1 Re8 25.Qd3 Ka7 26.a3 Bf8 27.
Nc3 Qd7 28.Qxd7+ Nxd7 29.Bg3 Nf6 30.h3 Bc5 31.Re1 Nh5 32.Bh4 Rxe1+ 33.Bxe1
Bd4 34.b3 Kb7 35.Ne2 Be3 36.Bc3 g6 37.g3 Bh6 38.Kg2 Bg7 39.Kf3 Bxc3 40.
Nxc3 Kc6 41.g4 Ng7 42.Kf4 Ne6+ 43.Ke3 Kd6 44.Ne4+ Ke5 45.Nf2 b5 46.Nd3+ 
Kd5 47.Nb4+ Ke5 48.Nxa6 Nf4 49.h4 h5 50.Nb4 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.06"]
[Round "1"]
[White "Ljubojevic, Ljubomir"]
[Black "Pomar Salamanca, Arturo"]
[Result "1-0"]
[WhiteElo "2615"]
[BlackElo "2450"]
[ECO "B10"]
[EventDate "1975.04.06"]
[PlyCount "69"]

1.e4 c6 2.d3 d5 3.Nd2 g6 4.Ngf3 Bg7 5.Be2 e5 6.O-O Ne7 7.c3 Bg4 8.exd5 
Bxf3 9.Bxf3 cxd5 10.c4 Nbc6 11.cxd5 Nxd5 12.Qb3 Nb6 13.Bxc6+ bxc6 14.Ne4 
O-O 15.Bg5 Qd5 16.Rfc1 f6 17.Be3 f5 18.Nc5 e4 19.Qc2 f4 20.dxe4 Qh5 21.Bd2
f3 22.Nd3 fxg2 23.Qb3+ Kh8 24.Bc3 Rad8 25.Bxg7+ Kxg7 26.Rxc6 Qf3 27.Qc3+ 
Kg8 28.Rc7 Rf6 29.e5 Rxd3 30.exf6 Rxc3 31.bxc3 Nd5 32.Rg7+ Kf8 33.Rb1 Qxc3
34.Rxh7 Qe5 35.Rb8+ 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.06"]
[Round "1"]
[White "Visier Segovia, Fernando"]
[Black "Mecking, Henrique"]
[Result "0-1"]
[WhiteElo "2375"]
[BlackElo "2610"]
[ECO "E41"]
[EventDate "1975.04.06"]
[PlyCount "80"]

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.f4 Ng6 12.Nxg6 fxg6 13.O-O O-O 14.f5 b5 15.g4 bxc4 
16.Bc2 Qa5 17.Qf3 gxf5 18.gxf5 Bd7 19.Kh1 Kh8 20.Rg1 Rab8 21.Qg2 Rf7 22.
Qg6 Rbf8 23.Bxh6 gxh6 24.Qxh6+ Nh7 25.f6 Qxc3 26.Raf1 Rg8 27.Rxg8+ Kxg8 
28.Rg1+ Kh8 29.Rg7 Qe1+ 30.Kg2 Bh3+ 31.Kxh3 Qf1+ 32.Kg3 Qg1+ 33.Kh3 Rxg7 
34.fxg7+ Kg8 35.Qe6+ Kxg7 36.Qe7+ Kh6 37.Qh4+ Kg6 38.Qg3+ Ng5+ 39.Kh4 Qe1 
40.Bb1 c3 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.06"]
[Round "1"]
[White "Olafsson, Fridrik"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[WhiteElo "2535"]
[BlackElo "2600"]
[ECO "D90"]
[EventDate "1975.04.06"]
[PlyCount "27"]

1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.Nc3 d5 5.cxd5 Nxd5 6.Bd2 c5 7.Rc1 Nxc3 8.Bxc3
cxd4 9.Nxd4 O-O 10.e3 Nd7 11.Be2 Nb6 12.Nb5 Qxd1+ 13.Rxd1 Bd7 14.Bxg7 
1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.06"]
[Round "1"]
[White "Rodriguez Vargas, Orestes"]
[Black "Tatai, Stefano"]
[Result "0-1"]
[WhiteElo "2435"]
[BlackElo "2455"]
[ECO "D40"]
[EventDate "1975.04.06"]
[PlyCount "76"]

1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.e3 d5 5.Nc3 Nc6 6.Bd3 a6 7.O-O dxc4 8.Bxc4 b5 
9.Bd3 Bb7 10.a4 b4 11.Ne4 cxd4 12.exd4 Na5 13.Nxf6+ gxf6 14.Re1 Bd5 15.Bf4
Bd6 16.Bxd6 Qxd6 17.Nd2 Qf4 18.Ne4 Nb3 19.Rb1 Ke7 20.Ng3 Rad8 21.Bxa6 h5 
22.h4 Kf8 23.Re3 Nxd4 24.Rc1 Qxh4 25.Qe1 Qg4 26.Rd1 Nf5 27.Re4 Qg6 28.
Qxb4+ Kg7 29.Nxf5+ exf5 30.Rxd5 fxe4 31.Bb7 h4 32.Rxd8 Rxd8 33.Qxe4 Qg5 
34.Kh2 Rd2 35.Qf3 Rxb2 36.Be4 Rb4 37.Bc2 Rf4 38.Qd3 Qe5 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.06"]
[Round "1"]
[White "Cardoso, Rodolfo Tan"]
[Black "Fernandez Fernandez, Angel"]
[Result "1-0"]
[WhiteElo "2410"]
[BlackElo "2300"]
[ECO "C06"]
[EventDate "1975.04.06"]
[PlyCount "65"]

1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.Bd3 b6 6.Ne2 c5 7.c3 Ba6 8.Bxa6 Nxa6
9.O-O Be7 10.f4 g6 11.Kh1 Qc7 12.c4 dxc4 13.Nxc4 cxd4 14.Qxd4 O-O-O 15.
Nd6+ Bxd6 16.exd6 Qc5 17.Be3 Qxd4 18.Bxd4 Rhf8 19.Ng3 Ndc5 20.Bf6 Rd7 21.
a3 Nb3 22.Rad1 Nac5 23.Rf3 Kb7 24.Rc3 Kc6 25.Ne4 Kb5 26.Re1 a5 27.Be7 Re8 
28.Nf6 Rexe7 29.dxe7 Rxe7 30.g4 h5 31.gxh5 gxh5 32.Re5 h4 33.Rxb3+ 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.07"]
[Round "2"]
[White "Petrosian, Tigran"]
[Black "Olafsson, Fridrik"]
[Result "1/2-1/2"]
[WhiteElo "2645"]
[BlackElo "2535"]
[ECO "A13"]
[EventDate "1975.04.06"]
[PlyCount "27"]

1.Nf3 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Qa4+ Nbd7 6.Qxc4 c5 7.Qc2 b6 8.b3 
Bb7 9.Bb2 Be7 10.O-O O-O 11.Nc3 Rc8 12.Rfd1 a6 13.d3 Qc7 14.Rac1 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.07"]
[Round "2"]
[White "Tatai, Stefano"]
[Black "Larsen, Bent"]
[Result "0-1"]
[WhiteElo "2455"]
[BlackElo "2625"]
[ECO "A00"]
[EventDate "1975.04.06"]
[PlyCount "0"]

0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.07"]
[Round "2"]
[White "Bellon Lopez, Juan Manuel"]
[Black "Cardoso, Rodolfo Tan"]
[Result "0-1"]
[WhiteElo "2415"]
[BlackElo "2410"]
[ECO "A20"]
[EventDate "1975.04.06"]
[PlyCount "56"]

1.g3 d5 2.Bg2 e5 3.c4 c6 4.cxd5 cxd5 5.d4 Bb4+ 6.Bd2 Bxd2+ 7.Qxd2 e4 8.Nc3
Ne7 9.f3 f5 10.Nh3 O-O 11.O-O Nd7 12.fxe4 fxe4 13.Rxf8+ Nxf8 14.Rf1 Bf5 
15.Nf4 Qd7 16.e3 Nfg6 17.Nfxd5 Nxd5 18.Rxf5 Nxc3 19.Bh3 Nd5 20.Rf8+ Nxf8 
21.Bxd7 Nxd7 22.Qc2 N7f6 23.Qb3 b6 24.h3 Rc8 25.Kf2 h5 26.Qd1 a5 27.a3 b5 
28.Ke2 Rc3 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.07"]
[Round "2"]
[White "Hort, Vlastimil"]
[Black "Visier Segovia, Fernando"]
[Result "1/2-1/2"]
[WhiteElo "2600"]
[BlackElo "2375"]
[ECO "E92"]
[EventDate "1975.04.06"]
[PlyCount "100"]

1.c4 Nf6 2.Nf3 g6 3.Nc3 Bg7 4.e4 d6 5.d4 O-O 6.Be2 e5 7.d5 Nh5 8.g3 Nd7 9.
Bg5 Ndf6 10.h3 c5 11.Nh4 Qa5 12.Bd2 a6 13.Qc2 Qc7 14.Ng2 Bd7 15.g4 Nf4 16.
Nxf4 exf4 17.Bxf4 b5 18.O-O Rab8 19.a4 bxc4 20.Bxc4 Bc8 21.Rae1 Nd7 22.b3 
Re8 23.Nb1 Bd4 24.Nd2 h5 25.Nf3 Bg7 26.Nh2 hxg4 27.hxg4 Nb6 28.Bd3 Qe7 29.
Qd2 Nd7 30.Bc4 Rb4 31.Bg5 Qf8 32.Qc2 Ne5 33.Bd2 Rb8 34.Be2 Qe7 35.Bf4 Qh4 
36.Kg2 Nxg4 37.Bxg4 Bxg4 38.Nxg4 Qxg4+ 39.Bg3 Rb4 40.f3 Qd7 41.Rb1 Reb8 
42.Be1 R4b6 43.Ba5 R6b7 44.Bc3 Qe7 45.Bd2 Qe5 46.Rfe1 Bf6 47.Rh1 Qe7 48.
Rh3 Bd4 49.Qd3 Bg7 50.Rg3 Qe5 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.07"]
[Round "2"]
[White "Debarnot, Roberto Luis"]
[Black "Ljubojevic, Ljubomir"]
[Result "0-1"]
[WhiteElo "2380"]
[BlackElo "2615"]
[ECO "A30"]
[EventDate "1975.04.06"]
[PlyCount "80"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5 6.O-O cxd4 7.Nxd4 Bxg2 8.Kxg2 
Qc7 9.b3 a6 10.Qd3 Be7 11.Nc3 O-O 12.Qf3 Ra7 13.Bb2 Rc8 14.Rac1 d6 15.Rfd1
Qd8 16.Ne4 Rac7 17.Nc2 Ne8 18.g4 b5 19.Ne3 bxc4 20.bxc4 h6 21.Rd3 Nd7 22.
Rcd1 Rc6 23.Rb3 Nf8 24.Kh1 Ng6 25.Rb7 Rb6 26.Rxb6 Qxb6 27.Bd4 Qb4 28.Kg1 
Nh4 29.Qg3 Qb7 30.f3 Ng6 31.Kf1 Bh4 32.Qg1 Nf4 33.Nxd6 Nxd6 34.Be5 Nxe2 
35.Kxe2 Nxc4 36.Nxc4 Qb5 37.Rc1 Rxc4 38.Rxc4 Qxc4+ 39.Ke3 Qxa2 40.Kd3 Qd5+
0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.07"]
[Round "2"]
[White "Mecking, Henrique"]
[Black "Tal, Mikhail"]
[Result "1-0"]
[WhiteElo "2610"]
[BlackElo "2645"]
[ECO "B97"]
[EventDate "1975.04.06"]
[PlyCount "127"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 8.Qd2 
Qxb2 9.Nb3 Qa3 10.Bxf6 gxf6 11.Be2 Nc6 12.O-O h5 13.Nb1 Qb4 14.Qe3 d5 15.
exd5 Ne7 16.Nc3 Nf5 17.Qd3 Qb6+ 18.Rf2 Qe3 19.Ne4 Qxd3 20.Bxd3 Be7 21.Re1 
Kf8 22.dxe6 Bxe6 23.Nec5 Nd4 24.Nxe6+ Nxe6 25.Bf5 Nc7 26.Rd1 Nb5 27.Rd7 
Rd8 28.c4 Nd6 29.Rxd8+ Bxd8 30.Bd3 b6 31.Rd2 Bc7 32.Kf2 Kg7 33.Kf3 Re8 34.
Re2 Rd8 35.Rd2 Nb7 36.Be4 Rxd2 37.Nxd2 Nc5 38.h4 Bd6 39.Nf1 Bc7 40.Ng3 Kh6
41.Nf5+ Kh7 42.Ng3+ Kh6 43.Bc2 Ne6 44.Nf5+ Kh7 45.g3 Ng7 46.Ne7+ Kh8 47.
Nd5 Bd8 48.Ke4 Ne6 49.Bd1 Ng7 50.Nb4 a5 51.Nd5 Kg8 52.Nc3 Kf8 53.Bc2 Ke7 
54.Kd5 Kd7 55.Ba4+ Ke7 56.Bc2 Kd7 57.Ba4+ Ke7 58.Kc6 Nf5 59.Nd5+ Ke6 60.
Nxb6 Nd4+ 61.Kb7 Kd6 62.Nd7 Ne6 63.Kc8 Be7 64.Bd1 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.07"]
[Round "2"]
[White "Pomar Salamanca, Arturo"]
[Black "Rodriguez Vargas, Orestes"]
[Result "0-1"]
[WhiteElo "2450"]
[BlackElo "2435"]
[ECO "E65"]
[EventDate "1975.04.06"]
[PlyCount "74"]

1.d4 Nf6 2.Nf3 g6 3.g3 Bg7 4.Bg2 O-O 5.O-O d6 6.b3 Nbd7 7.Bb2 c5 8.c4 a6 
9.Nc3 Rb8 10.Rc1 b5 11.dxc5 Nxc5 12.cxb5 axb5 13.Nd4 Bd7 14.b4 Na6 15.a3 
Qb6 16.Qd2 Nc7 17.Rfd1 Rfc8 18.e4 Ng4 19.Nd5 Nxd5 20.exd5 Rxc1 21.Rxc1 Bh6
22.f4 Ne5 23.Ba1 Ra8 24.Kh1 Rxa3 25.Nc6 Nc4 26.Qe2 e5 27.Rf1 Qe3 28.Qc2 
exf4 29.gxf4 Bf5 30.Qd1 Be4 31.Re1 Bxg2+ 32.Kxg2 Bg7 33.Bxg7 Ra2+ 34.Kh1 
Qh3 35.Ne7+ Kxg7 36.Qd4+ Ne5 37.Nf5+ Kf8 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.07"]
[Round "2"]
[White "Andersson, Ulf"]
[Black "Fernandez Fernandez, Angel"]
[Result "1-0"]
[WhiteElo "2565"]
[BlackElo "2300"]
[ECO "A10"]
[EventDate "1975.04.06"]
[PlyCount "73"]

1.Nf3 f5 2.c4 Nf6 3.g3 Nc6 4.d4 d5 5.cxd5 Nxd5 6.Bg2 e6 7.O-O Be7 8.Nc3 
O-O 9.Bd2 Bf6 10.e3 Nce7 11.Rc1 b6 12.Qb3 Bb7 13.Rfd1 Qe8 14.Ne1 g5 15.Nd3
a5 16.a4 Rf7 17.Nb5 Bc6 18.Rc4 Bxb5 19.axb5 Rd8 20.Rdc1 Rd7 21.Qa2 Rd8 22.
Qa4 Ra8 23.b3 Rb8 24.R4c2 Qd7 25.b4 axb4 26.Bxb4 Ng6 27.Bd2 Bd8 28.Qa7 Qc8
29.Qa2 Qd7 30.Rc6 f4 31.Rxe6 f3 32.Rxg6+ hxg6 33.Ne5 Qf5 34.Bxf3 g4 35.e4 
Qf6 36.Qxd5 gxf3 37.Bg5 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.08"]
[Round "3"]
[White "Fernandez Fernandez, Angel"]
[Black "Bellon Lopez, Juan Manuel"]
[Result "0-1"]
[WhiteElo "2300"]
[BlackElo "2415"]
[ECO "B28"]
[EventDate "1975.04.06"]
[PlyCount "50"]

1.e4 c5 2.Nf3 a6 3.Nc3 b5 4.d4 cxd4 5.Nxd4 Bb7 6.f3 Nc6 7.Be3 Nf6 8.Nb3 e6
9.Qd2 d6 10.O-O-O Be7 11.h4 O-O 12.Qf2 Nd7 13.g4 Qc7 14.g5 Nce5 15.h5 Rac8
16.Nd4 b4 17.Na4 Bc6 18.g6 Bxa4 19.h6 fxg6 20.Bh3 Nc5 21.Qh2 gxh6 22.b3 
Bd7 23.Bxh6 Nxf3 24.Nxf3 Rxf3 25.Bg7 Nxb3+ 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.08"]
[Round "3"]
[White "Ljubojevic, Ljubomir"]
[Black "Andersson, Ulf"]
[Result "1/2-1/2"]
[WhiteElo "2615"]
[BlackElo "2565"]
[ECO "B80"]
[EventDate "1975.04.06"]
[PlyCount "94"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 a6 7.Qf3 Qc7 8.O-O-O 
Nc6 9.Be2 Be7 10.Qg3 O-O 11.f4 Bd7 12.e5 Ne8 13.Kb1 Rc8 14.Bd3 dxe5 15.
fxe5 Nxe5 16.Bf4 Bd6 17.Ne4 Nxd3 18.Bxd6 Nxd6 19.Nxd6 Nb4 20.Nxc8 Rxc8 21.
Qxc7 Rxc7 22.Rhe1 Kf8 23.Rd2 h6 24.g3 Nd5 25.Rd3 Rc5 26.a3 Nf6 27.Nf3 Ke7 
28.Ne5 Be8 29.b4 Rc7 30.Kb2 b5 31.Rc3 Rxc3 32.Kxc3 Nd5+ 33.Kd4 f6 34.Nd3 
Kd6 35.Nc5 e5+ 36.Kd3 Bg6+ 37.Kd2 Nb6 38.Kc3 Nc4 39.a4 Nb6 40.a5 Nd5+ 41.
Kb3 Bf7 42.Ka3 Nc7 43.Rd1+ Bd5 44.g4 g6 45.Kb2 f5 46.gxf5 gxf5 47.Kc3 f4 
1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.08"]
[Round "3"]
[White "Tal, Mikhail"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
[WhiteElo "2645"]
[BlackElo "2600"]
[ECO "B08"]
[EventDate "1975.04.06"]
[PlyCount "31"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3 Bg7 5.Be2 O-O 6.O-O Bg4 7.Be3 Nbd7 8.Qd2 
e5 9.dxe5 dxe5 10.Rfd1 c6 11.h3 Bxf3 12.Bxf3 Re8 13.Qe2 Qc7 14.Qc4 Nb6 15.
Qc5 Nbd7 16.Qc4 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.08"]
[Round "3"]
[White "Visier Segovia, Fernando"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[WhiteElo "2375"]
[BlackElo "2645"]
[ECO "D27"]
[EventDate "1975.04.06"]
[PlyCount "67"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 d5 6.Nf3 O-O 7.O-O dxc4 8.Bxc4 a6
9.Bd3 cxd4 10.exd4 Nc6 11.Be3 Be7 12.Rc1 Nb4 13.Bb1 b6 14.Ne5 Bb7 15.Re1 
Rc8 16.Bg5 g6 17.Bh6 Re8 18.Qe2 Qd6 19.Rcd1 b5 20.a3 Nbd5 21.Ne4 Nxe4 22.
Bxe4 Bf6 23.Qf3 Qe7 24.Rc1 Red8 25.Rxc8 Rxc8 26.Nd3 Ba8 27.h3 Qd6 28.Ne5 
Bxe5 29.Bxd5 Bh2+ 30.Kh1 Qxd5 31.Qxd5 Bxd5 32.Kxh2 f6 33.Rc1 Rxc1 34.Bxc1 
1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.08"]
[Round "3"]
[White "Rodriguez Vargas, Orestes"]
[Black "Debarnot, Roberto Luis"]
[Result "1-0"]
[WhiteElo "2435"]
[BlackElo "2380"]
[ECO "A30"]
[EventDate "1975.04.06"]
[PlyCount "133"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5 6.Nc3 cxd4 7.Qxd4 Nc6 8.Qf4 
Be7 9.O-O O-O 10.Rd1 d6 11.b3 Qb8 12.Bb2 Rd8 13.e4 a6 14.Rac1 b5 15.Ne2 e5
16.Qe3 Qa7 17.Qxa7 Rxa7 18.Nc3 bxc4 19.bxc4 Na5 20.Nd5 Bxd5 21.cxd5 Raa8 
22.Ba3 Bf8 23.Nd2 Nb7 24.Rb1 Ra7 25.Rdc1 Ne8 26.Rc6 Nc5 27.Nc4 Na4 28.Rc1 
f6 29.Na5 Rda8 30.Nb3 Rb7 31.Bh3 g6 32.Bc8 Rb6 33.Bd7 Rd8 34.Be6+ Kg7 35.
Rc8 Rb8 36.R8c2 Rb5 37.Bc8 a5 38.Ba6 Rb6 39.Bf1 Nc5 40.Nxc5 dxc5 41.Bxc5 
Bxc5 42.Rxc5 Rb4 43.f3 f5 44.exf5 gxf5 45.Rxa5 Rd4 46.d6 Nxd6 47.Rxe5 Ra8 
48.Re7+ Kf6 49.Rxh7 Rxa2 50.Rh6+ Ke7 51.Re1+ Kd7 52.Re2 Rxe2 53.Bxe2 f4 
54.Kf2 Ke7 55.Rh5 Kf6 56.Rc5 Nf5 57.g4 Nh4 58.Rh5 Ng6 59.h4 Rb4 60.Rf5+ 
Ke6 61.h5 Ne7 62.Rc5 Rb1 63.Rc4 Nd5 64.Re4+ Kf6 65.g5+ Kf5 66.Bd3 Rd1 67.
Re3+ 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.08"]
[Round "3"]
[White "Larsen, Bent"]
[Black "Pomar Salamanca, Arturo"]
[Result "0-1"]
[WhiteElo "2625"]
[BlackElo "2450"]
[ECO "A23"]
[EventDate "1975.04.06"]
[PlyCount "68"]

1.g3 e5 2.c4 Nf6 3.Bg2 c6 4.Nf3 e4 5.Nd4 d5 6.cxd5 cxd5 7.Nc3 Nc6 8.Nxc6 
bxc6 9.d3 exd3 10.Qxd3 Be7 11.O-O O-O 12.b3 Be6 13.Rd1 Qd7 14.Bb2 Bh3 15.
Rac1 Bxg2 16.Kxg2 Rfd8 17.Na4 Ne4 18.f3 Ng5 19.Qc3 Qh3+ 20.Kh1 Ne6 21.Qxc6
Bd6 22.Rg1 h5 23.Rg2 h4 24.gxh4 Rac8 25.Qxc8 Rxc8 26.Rxc8+ Kh7 27.Rc1 d4 
28.Rcg1 d3 29.Nc3 Be5 30.Nd1 Bxb2 31.Rg3 Qf5 32.Nxb2 dxe2 33.Nc4 Qd3 34.h3
Qc3 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.08"]
[Round "3"]
[White "Olafsson, Fridrik"]
[Black "Tatai, Stefano"]
[Result "1/2-1/2"]
[WhiteElo "2535"]
[BlackElo "2455"]
[ECO "E71"]
[EventDate "1975.04.06"]
[PlyCount "81"]

1.c4 g6 2.d4 Bg7 3.Nc3 c5 4.d5 d6 5.e4 Nf6 6.Bd3 O-O 7.h3 Na6 8.Bg5 h6 9.
Be3 Nc7 10.Qd2 Kh7 11.a4 e6 12.Nge2 exd5 13.cxd5 b6 14.O-O Re8 15.Ng3 Ba6 
16.Rad1 Bxd3 17.Qxd3 a6 18.f4 Nd7 19.e5 dxe5 20.f5 Rf8 21.Nce4 Ne8 22.
fxg6+ fxg6 23.Rxf8 Bxf8 24.d6 Nef6 25.Bg5 Bg7 26.Nh5 Qh8 27.Bxf6 Bxf6 28.
Qd5 gxh5 29.Qf7+ Qg7 30.Qxd7 Bh4 31.Qf5+ Qg6 32.Qf3 Rd8 33.d7 Be7 34.Nc3 
Qe6 35.Qxh5 Kg7 36.Ne4 c4 37.Ng3 Rf8 38.Ne4 Rd8 39.Ng3 Rf8 40.Ne4 Rd8 41.
Ng3 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.08"]
[Round "3"]
[White "Cardoso, Rodolfo Tan"]
[Black "Mecking, Henrique"]
[Result "1/2-1/2"]
[WhiteElo "2410"]
[BlackElo "2610"]
[ECO "B91"]
[EventDate "1975.04.06"]
[PlyCount "55"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g3 e5 7.Nde2 Nbd7 8.Bg2 
Be7 9.O-O O-O 10.h3 b5 11.Be3 Bb7 12.a4 b4 13.Nd5 Nxd5 14.exd5 a5 15.c3 
bxc3 16.Nxc3 Ba6 17.Re1 Bg5 18.Bxg5 Qxg5 19.Ne4 Qe7 20.Qd2 f5 21.Ng5 Nc5 
22.Ne6 Nb3 23.Qc3 Nxa1 24.Nxf8 Qxf8 25.Rxa1 Qd8 26.Rc1 Rc8 27.Qe3 Rxc1+ 
28.Qxc1 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.10"]
[Round "4"]
[White "Andersson, Ulf"]
[Black "Bellon Lopez, Juan Manuel"]
[Result "1/2-1/2"]
[WhiteElo "2565"]
[BlackElo "2415"]
[ECO "A34"]
[EventDate "1975.04.06"]
[PlyCount "65"]

1.Nf3 Nf6 2.c4 e6 3.g3 a6 4.Nc3 c5 5.Bg2 Nc6 6.O-O d5 7.cxd5 Nxd5 8.d4 Nf6
9.dxc5 Qxd1 10.Rxd1 Bxc5 11.Bf4 O-O 12.Bd6 Bxd6 13.Rxd6 Bd7 14.Rad1 Rfd8 
15.Nd4 Na5 16.Nb3 Nxb3 17.axb3 Kf8 18.Ne4 Nxe4 19.Bxe4 Ke7 20.Bxb7 Bb5 21.
Rxd8 Rxd8 22.Rxd8 Kxd8 23.Kf1 Kc7 24.Be4 f5 25.Bc2 Kd6 26.Ke1 Kc5 27.Kd2 
Kb4 28.f4 a5 29.e4 g6 30.exf5 exf5 31.Bd1 Bc6 32.Kc1 Bd5 33.Be2 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.10"]
[Round "4"]
[White "Debarnot, Roberto Luis"]
[Black "Larsen, Bent"]
[Result "0-1"]
[WhiteElo "2380"]
[BlackElo "2625"]
[ECO "A13"]
[EventDate "1975.04.06"]
[PlyCount "56"]

1.c4 e6 2.Nf3 b6 3.g3 Bb7 4.Bg2 Nf6 5.O-O d5 6.cxd5 exd5 7.b3 Bd6 8.Bb2 
O-O 9.Nd4 Re8 10.Nc3 Bf8 11.a3 c5 12.Nc2 Nc6 13.d4 Na5 14.b4 Nc4 15.Bc1 
cxb4 16.axb4 Ne4 17.Nxe4 dxe4 18.Na3 Qd5 19.Nc2 Qd7 20.e3 Bd5 21.Re1 Rac8 
22.b5 Qxb5 23.Rxa7 Nb2 24.Bxb2 Qxb2 25.Qh5 Bb3 26.Na1 Rc1 27.Rf1 Bc4 28.
Qf5 Qb1 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.10"]
[Round "4"]
[White "Hort, Vlastimil"]
[Black "Cardoso, Rodolfo Tan"]
[Result "1-0"]
[WhiteElo "2600"]
[BlackElo "2410"]
[ECO "A40"]
[EventDate "1975.04.06"]
[PlyCount "57"]

1.d4 g6 2.c4 c6 3.Nc3 Bg7 4.e4 d5 5.e5 dxc4 6.Bxc4 Nh6 7.h3 Nf5 8.Nf3 b5 
9.Bb3 h5 10.Ne4 Na6 11.Neg5 e6 12.a4 b4 13.Ne4 Qa5 14.Bg5 c5 15.Nf6+ Kf8 
16.d5 Bh6 17.Bxh6+ Rxh6 18.O-O Qd8 19.Qc1 Kg7 20.Rd1 Qe7 21.d6 Qd8 22.Ng5 
Bd7 23.Bc2 Rh8 24.Bxf5 gxf5 25.h4 Bc6 26.Rd3 Rh6 27.Rg3 Rg6 28.Nxe6+ fxe6 
29.Rxg6+ 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.10"]
[Round "4"]
[White "Mecking, Henrique"]
[Black "Fernandez Fernandez, Angel"]
[Result "1-0"]
[WhiteElo "2610"]
[BlackElo "2300"]
[ECO "B00"]
[EventDate "1975.04.06"]
[PlyCount "41"]

1.e4 Nc6 2.Nf3 d5 3.exd5 Qxd5 4.Nc3 Qh5 5.Nb5 Kd8 6.d4 a6 7.Nc3 Bf5 8.Be2 
Qg6 9.d5 Bxc2 10.Qd2 Nb8 11.g4 Be4 12.Nh4 Qf6 13.g5 Qe5 14.O-O Bg6 15.f4 
Qd6 16.f5 h6 17.fxg6 hxg5 18.Qxg5 Nf6 19.Bf4 Qb6+ 20.Kh1 Qxb2 21.Rac1 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.10"]
[Round "4"]
[White "Petrosian, Tigran"]
[Black "Tal, Mikhail"]
[Result "1/2-1/2"]
[WhiteElo "2645"]
[BlackElo "2645"]
[ECO "E11"]
[EventDate "1975.04.06"]
[PlyCount "37"]

1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+ 4.Bd2 Qe7 5.g3 Nc6 6.Bg2 Bxd2+ 7.Nbxd2 d6 8.
O-O O-O 9.e4 e5 10.d5 Nb8 11.Ne1 a5 12.Nd3 Na6 13.b3 b6 14.a3 Nc5 15.Qc2 
Bd7 16.b4 Nxd3 17.Qxd3 Ra7 18.Qc3 Rfa8 19.Nb3 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.10"]
[Round "4"]
[White "Tatai, Stefano"]
[Black "Visier Segovia, Fernando"]
[Result "1/2-1/2"]
[WhiteElo "2455"]
[BlackElo "2375"]
[ECO "B31"]
[EventDate "1975.04.06"]
[PlyCount "80"]

1.e4 c5 2.Nf3 Nc6 3.Bb5 g6 4.O-O Bg7 5.Re1 Nf6 6.e5 Nd5 7.Nc3 Nc7 8.Bxc6 
dxc6 9.Ne4 Ne6 10.d3 O-O 11.h3 b6 12.Neg5 Qc7 13.Qe2 h6 14.Nxe6 Bxe6 15.
Bf4 Qd7 16.a4 a5 17.b3 Rae8 18.Rad1 g5 19.Bc1 Bd5 20.Nh2 Qf5 21.Nf1 Qg6 
22.Ng3 f5 23.f4 Be6 24.Qh5 Qxh5 25.Nxh5 g4 26.Be3 Kh7 27.Ng3 Kg6 28.h4 Rd8
29.Ne2 Bc8 30.Rd2 Rd7 31.Red1 Rfd8 32.Kf2 h5 33.Nc3 e6 34.Nb1 Bf8 35.Na3 
Ba6 36.g3 Be7 37.c4 Kf7 38.Nc2 Bb7 39.Ke2 Ba6 40.Bf2 Bb7 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.10"]
[Round "4"]
[White "Pomar Salamanca, Arturo"]
[Black "Olafsson, Fridrik"]
[Result "1/2-1/2"]
[WhiteElo "2450"]
[BlackElo "2535"]
[ECO "A42"]
[EventDate "1975.04.06"]
[PlyCount "33"]

1.e4 g6 2.d4 Bg7 3.c4 d6 4.Nc3 c6 5.g3 a6 6.a4 a5 7.Bg2 Na6 8.Nge2 e5 9.
Be3 Nf6 10.h3 O-O 11.d5 cxd5 12.cxd5 Nd7 13.O-O Ndc5 14.Kh2 Bd7 15.Nc1 Rc8
16.Nb3 Qb6 17.Nb5 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.10"]
[Round "4"]
[White "Ljubojevic, Ljubomir"]
[Black "Rodriguez Vargas, Orestes"]
[Result "1-0"]
[WhiteElo "2615"]
[BlackElo "2435"]
[ECO "B11"]
[EventDate "1975.04.06"]
[PlyCount "79"]

1.e4 c6 2.Nf3 d5 3.Nc3 Bg4 4.h3 Bxf3 5.Qxf3 Nf6 6.d3 e6 7.a3 Nbd7 8.g4 g6 
9.Qg3 Bc5 10.e5 d4 11.Ne2 Nd5 12.Bg2 h5 13.c3 h4 14.Qh2 dxc3 15.bxc3 Qa5 
16.Bd2 Qa6 17.Nc1 Qa4 18.O-O Bb6 19.Bf3 Bc7 20.Re1 O-O-O 21.Bd1 Qa6 22.f4 
Ba5 23.c4 Nc3 24.Bc2 Nc5 25.Be3 N3a4 26.Rf1 Bc3 27.Rb1 Bd4 28.Qf2 Bxe3 29.
Qxe3 Qa5 30.d4 Na6 31.Qb3 Nb6 32.c5 Nxc5 33.dxc5 Qxc5+ 34.Kh1 Rd2 35.Be4 
Rhd8 36.Qf3 Qc4 37.Re1 R8d7 38.Nb3 R2d3 39.Bxd3 Rxd3 40.Re3 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.11"]
[Round "5"]
[White "Rodriguez Vargas, Orestes"]
[Black "Andersson, Ulf"]
[Result "1/2-1/2"]
[WhiteElo "2435"]
[BlackElo "2565"]
[ECO "E55"]
[EventDate "1975.04.06"]
[PlyCount "81"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 O-O 6.Nf3 d5 7.O-O dxc4 8.Bxc4 
Nbd7 9.a3 cxd4 10.exd4 Bxc3 11.bxc3 Qc7 12.Qd3 b6 13.h3 Bb7 14.Ba2 Rac8 
15.c4 e5 16.Nxe5 Nxe5 17.dxe5 Qxe5 18.Be3 Rfd8 19.Qe2 Ne4 20.Rfe1 Rd6 21.
f3 Nc3 22.Qf2 Nxa2 23.Rxa2 Qf5 24.c5 Rg6 25.Kh1 bxc5 26.Bxc5 a6 27.Rae2 h6
28.Re5 Qf4 29.Qd4 Qg3 30.Qf2 Qxf2 31.Bxf2 Rc2 32.R1e2 Rgc6 33.Bd4 Rxe2 34.
Rxe2 Rc4 35.Rd2 Bc8 36.Kg1 Be6 37.Kf2 a5 38.Bb6 a4 39.Ba5 Kh7 40.Bb4 h5 
41.Ke3 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.11"]
[Round "5"]
[White "Olafsson, Fridrik"]
[Black "Debarnot, Roberto Luis"]
[Result "1-0"]
[WhiteElo "2535"]
[BlackElo "2380"]
[ECO "D41"]
[EventDate "1975.04.06"]
[PlyCount "67"]

1.c4 c5 2.Nf3 Nf6 3.Nc3 e6 4.d4 d5 5.cxd5 Nxd5 6.e4 Nxc3 7.bxc3 cxd4 8.
cxd4 Nc6 9.a3 Be7 10.Bc4 b5 11.Ba2 O-O 12.O-O Bb7 13.Qd3 Na5 14.Rd1 Nc4 
15.Bb1 g6 16.Qb3 a6 17.Bh6 Re8 18.a4 Bf8 19.Bxf8 Rxf8 20.Bd3 Nd6 21.Re1 
Rc8 22.h4 Qc7 23.h5 Rfe8 24.Ra2 Qc3 25.Qb1 Kg7 26.axb5 axb5 27.Bxb5 Bxe4 
28.Rxe4 Rb8 29.Re5 Rec8 30.Rb2 Rb6 31.Rb3 Qc1+ 32.Re1 Qxb1 33.Rexb1 gxh5 
34.Bd3 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.11"]
[Round "5"]
[White "Tal, Mikhail"]
[Black "Tatai, Stefano"]
[Result "1-0"]
[WhiteElo "2645"]
[BlackElo "2455"]
[ECO "A61"]
[EventDate "1975.04.06"]
[PlyCount "79"]

1.d4 Nf6 2.Nf3 c5 3.d5 e6 4.c4 exd5 5.cxd5 d6 6.Nc3 g6 7.Bg5 h6 8.Bh4 g5 
9.Bg3 Nh5 10.e3 Nxg3 11.hxg3 Bg7 12.Qc2 Nd7 13.Bd3 Nf6 14.Nd2 O-O 15.Nc4 
Qe7 16.a4 Bd7 17.O-O Rab8 18.Rfe1 b6 19.e4 Rfe8 20.Nb5 Bxb5 21.axb5 Ng4 
22.Qd1 Qd7 23.Rxa7 Qxa7 24.Qxg4 Rbd8 25.Qf5 Re5 26.Nxe5 Bxe5 27.f4 Bd4+ 
28.Kh2 Qd7 29.Qxd7 Rxd7 30.Ra1 c4 31.Bxc4 Bxb2 32.Ra8+ Kg7 33.Be2 Bf6 34.
Rb8 Bd8 35.Bg4 Bc7 36.Re8 Rd8 37.Re7 Bb8 38.Rb7 Kf6 39.Bh5 Rf8 40.Kh3 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.11"]
[Round "5"]
[White "Visier Segovia, Fernando"]
[Black "Pomar Salamanca, Arturo"]
[Result "1/2-1/2"]
[WhiteElo "2375"]
[BlackElo "2450"]
[ECO "D47"]
[EventDate "1975.04.06"]
[PlyCount "28"]

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b4
9.Ne4 c5 10.Qa4 Bb7 11.Nxf6+ gxf6 12.dxc5 Bxc5 13.O-O Rg8 14.e4 Qb6 
1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.11"]
[Round "5"]
[White "Larsen, Bent"]
[Black "Ljubojevic, Ljubomir"]
[Result "1/2-1/2"]
[WhiteElo "2625"]
[BlackElo "2615"]
[ECO "A00"]
[EventDate "1975.04.06"]
[PlyCount "92"]

1.g3 e5 2.Bg2 Nc6 3.d3 d5 4.a3 Nf6 5.b4 a5 6.b5 Nd4 7.Nc3 c6 8.Rb1 Bd6 9.
e3 Ne6 10.Nge2 O-O 11.O-O Qe7 12.a4 Nd7 13.f4 f5 14.fxe5 Nxe5 15.Nf4 Ng4 
16.Qe1 Bd7 17.h3 Nxf4 18.gxf4 Nf6 19.Ne2 c5 20.Bd2 Rae8 21.Kh1 b6 22.Ng1 
Qf7 23.Qf2 Qh5 24.Rbe1 h6 25.Qf3 Qf7 26.Bc3 Be6 27.Be5 Bxe5 28.fxe5 Nh5 
29.Ne2 g5 30.Ng3 Ng7 31.c3 Qg6 32.Qd1 Rd8 33.Ne2 Nh5 34.Rg1 f4 35.exf4 
Nxf4 36.Nxf4 Rxf4 37.Ref1 Rdf8 38.Rxf4 Rxf4 39.Rf1 Qf5 40.Rxf4 Qxf4 41.d4 
cxd4 42.Qxd4 Qxd4 43.cxd4 Kg7 44.Kh2 Kg6 45.Kg3 h5 46.Bf3 h4+ 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.11"]
[Round "5"]
[White "Bellon Lopez, Juan Manuel"]
[Black "Mecking, Henrique"]
[Result "1/2-1/2"]
[WhiteElo "2415"]
[BlackElo "2610"]
[ECO "D30"]
[EventDate "1975.04.06"]
[PlyCount "45"]

1.Nf3 Nf6 2.g3 d5 3.c4 e6 4.Bg2 Be7 5.O-O O-O 6.b3 c5 7.Bb2 Nc6 8.cxd5 
exd5 9.d4 Re8 10.Nc3 Bg4 11.Ne5 cxd4 12.Nxc6 bxc6 13.Qxd4 Qd7 14.Rfe1 Bd6 
15.Rac1 Rab8 16.Qd2 Bb4 17.a3 Bf8 18.b4 Bh3 19.Bf3 h5 20.Na4 Ne4 21.Bxe4 
dxe4 22.Qxd7 Bxd7 23.Nc5 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.11"]
[Round "5"]
[White "Cardoso, Rodolfo Tan"]
[Black "Petrosian, Tigran"]
[Result "0-1"]
[WhiteElo "2410"]
[BlackElo "2645"]
[ECO "B81"]
[EventDate "1975.04.06"]
[PlyCount "100"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.g4 a6 7.g5 Nfd7 8.h4 b5 
9.Bg2 Bb7 10.h5 Nc6 11.a3 Rc8 12.Rh3 Nxd4 13.Qxd4 Rc4 14.Qe3 Be7 15.f4 e5 
16.f5 h6 17.g6 fxg6 18.hxg6 Nf6 19.Bd2 Qa8 20.O-O-O Nxe4 21.Bxe4 Bxe4 22.
b3 Rd4 23.f6 Bxf6 24.Re1 d5 25.Nxe4 Rxe4 26.Qc5 Rxe1+ 27.Bxe1 Kd7 28.Bb4 
Qc6 29.Qa7+ Ke6 30.Rg3 e4 31.Qf7+ Ke5 32.Rc3 Qe6 33.Rc7 Kf5 34.Rd7 Re8 35.
Rd6 Qc8 36.Rxd5+ Kg4 37.Rd1 Qe6 38.Rg1+ Kh3 39.Qa7 e3 40.Qb7 Qe4 41.Qd7+ 
Re6 42.Qd1 e2 43.Qe1 Qe5 44.Rh1+ Kg4 45.Qg1+ Kf5 46.Qf2+ Kxg6 47.Rg1+ Kf7 
48.Re1 Kg8 49.Kd2 Bg5+ 50.Kd3 Qd5+ 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.11"]
[Round "5"]
[White "Fernandez Fernandez, Angel"]
[Black "Hort, Vlastimil"]
[Result "0-1"]
[WhiteElo "2300"]
[BlackElo "2600"]
[ECO "B32"]
[EventDate "1975.04.06"]
[PlyCount "80"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Qc7 5.c4 Nf6 6.Nc3 e6 7.a3 b6 8.Be3 Bb7
9.f3 Rc8 10.Be2 Ne5 11.Rc1 Qb8 12.Qa4 Ng6 13.Qd1 Bd6 14.Ndb5 Be5 15.g3 a6 
16.Nd4 h5 17.f4 Nxe4 18.Bf3 Nxc3 19.Rxc3 Bf6 20.h4 Ne7 21.O-O g6 22.Rb3 
Bxf3 23.Nxf3 Rxc4 24.Rxb6 Qc8 25.Qb3 O-O 26.Nd2 Rc6 27.Ne4 Bg7 28.Qd3 d5 
29.Ng5 Nf5 30.Rxc6 Qxc6 31.Rc1 Qb5 32.Qxb5 axb5 33.Kf2 Bxb2 34.Rb1 Bxa3 
35.Rxb5 Rc8 36.Bd2 Bc5+ 37.Kg2 Be7 38.Nf3 Bf6 39.Rb7 Rc2 40.Kh3 Nd4 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.12"]
[Round "6"]
[White "Debarnot, Roberto Luis"]
[Black "Visier Segovia, Fernando"]
[Result "1/2-1/2"]
[WhiteElo "2380"]
[BlackElo "2375"]
[ECO "E43"]
[EventDate "1975.04.06"]
[PlyCount "39"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Bd3 Bb7 6.Nf3 O-O 7.O-O c5 8.a3 Bxc3 
9.bxc3 Qc7 10.Re1 Ne4 11.Nd2 Nxd2 12.Bxd2 Nc6 13.Qh5 g6 14.Qh6 d6 15.e4 e5
16.f4 f6 17.d5 Na5 18.fxe5 fxe5 19.Bg5 Rae8 20.Rf1 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.12"]
[Round "6"]
[White "Andersson, Ulf"]
[Black "Mecking, Henrique"]
[Result "1/2-1/2"]
[WhiteElo "2565"]
[BlackElo "2610"]
[ECO "A09"]
[EventDate "1975.04.06"]
[PlyCount "31"]

1.Nf3 d5 2.c4 d4 3.d3 c5 4.e3 Nc6 5.exd4 cxd4 6.g3 e5 7.Bg2 Nf6 8.O-O Bd6 
9.a3 a5 10.Bg5 h6 11.Bxf6 Qxf6 12.Nbd2 Qe7 13.Re1 O-O 14.Qc2 Be6 15.Rac1 
Bc7 16.c5 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.12"]
[Round "6"]
[White "Hort, Vlastimil"]
[Black "Bellon Lopez, Juan Manuel"]
[Result "1-0"]
[WhiteElo "2600"]
[BlackElo "2415"]
[ECO "A58"]
[EventDate "1975.04.06"]
[PlyCount "115"]

1.d4 Nf6 2.c4 c5 3.d5 b5 4.cxb5 a6 5.bxa6 Bxa6 6.Nc3 d6 7.Nf3 g6 8.g3 Bg7 
9.Bh3 Nbd7 10.O-O O-O 11.Re1 Nb6 12.a3 Qc7 13.Rb1 Nfd7 14.Bg2 Rfb8 15.Nd2 
Ne5 16.Qc2 c4 17.Nde4 h6 18.Rd1 f5 19.Nd2 Nbd7 20.Nf3 Nxf3+ 21.Bxf3 Rb3 
22.Be3 Rab8 23.Bd4 Bxd4 24.Rxd4 Ne5 25.Rd2 Qa5 26.Bg2 Kg7 27.h3 h5 28.Kh2 
Qb6 29.e4 f4 30.gxf4 Nd3 31.Na2 Qd4 32.Nc1 Rxb2 33.Rxb2 Rxb2 34.Qxb2 Qxb2 
35.Rxb2 Nxb2 36.Bf1 Kf6 37.Kg3 e6 38.dxe6 Kxe6 39.Na2 Bb7 40.Nc3 d5 41.
exd5+ Bxd5 42.Kh4 Bc6 43.Kg5 Be8 44.h4 Nd3 45.f5+ gxf5 46.f4 Bc6 47.Bh3 
Kd6 48.Bxf5 Kc5 49.Bg6 Kd4 50.Na2 Bf3 51.f5 Ke5 52.f6 Nc5 53.f7 Ne6+ 54.
Kh6 Kf6 55.Nc3 Ke7 56.a4 Nd8 57.Kg7 Ne6+ 58.Kg8 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.12"]
[Round "6"]
[White "Ljubojevic, Ljubomir"]
[Black "Olafsson, Fridrik"]
[Result "1-0"]
[WhiteElo "2615"]
[BlackElo "2535"]
[ECO "B42"]
[EventDate "1975.04.06"]
[PlyCount "51"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 g6 6.c4 Bg7 7.Nc2 Ne7 8.Nc3 
Nbc6 9.O-O O-O 10.Bf4 Ne5 11.Be2 f5 12.Qd2 Nf7 13.Rad1 b6 14.Bf3 Ne5 15.
Bxe5 Bxe5 16.exf5 Ra7 17.fxe6 Rxf3 18.gxf3 Nf5 19.Rfe1 Nh4 20.Qd5 Qg5+ 21.
Kf1 Qg2+ 22.Ke2 d6 23.e7+ Kg7 24.e8=Q Bf5 25.Ne3 Qh3 26.Rg1 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.12"]
[Round "6"]
[White "Petrosian, Tigran"]
[Black "Fernandez Fernandez, Angel"]
[Result "1/2-1/2"]
[WhiteElo "2645"]
[BlackElo "2300"]
[ECO "D24"]
[EventDate "1975.04.06"]
[PlyCount "80"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 dxc4 5.e3 Be7 6.Bxc4 O-O 7.O-O a6 8.e4 b5 
9.Bd3 Bb7 10.Qc2 h6 11.e5 Nd5 12.Be4 Qd7 13.Rd1 Rd8 14.Ne2 Nc6 15.a3 Na5 
16.Ng3 Rac8 17.b4 Nc4 18.Nh5 a5 19.Bxh6 gxh6 20.Qc1 Nce3 21.fxe3 Nc3 22.
Qxc3 Bxe4 23.Rf1 axb4 24.axb4 Kh8 25.Ng3 Bg6 26.Ra7 Qe8 27.e4 h5 28.Qe3 
Qf8 29.Ne2 Qg7 30.Nf4 Rg8 31.Rb7 Qh7 32.Nxg6+ Qxg6 33.Qe2 Bxb4 34.Rxb5 Be7
35.Rb7 Bd8 36.d5 Ra8 37.d6 c5 38.Ne1 Rg7 39.Nd3 Bg5 40.g3 h4 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.12"]
[Round "6"]
[White "Pomar Salamanca, Arturo"]
[Black "Tal, Mikhail"]
[Result "0-1"]
[WhiteElo "2450"]
[BlackElo "2645"]
[ECO "A41"]
[EventDate "1975.04.06"]
[PlyCount "70"]

1.Nf3 g6 2.d4 Bg7 3.g3 d6 4.Bg2 Nd7 5.O-O e5 6.dxe5 dxe5 7.Nc3 Ngf6 8.Nd5 
O-O 9.Nxf6+ Qxf6 10.Bg5 Qb6 11.Rb1 Qe6 12.a3 e4 13.Nd4 Qe5 14.Be3 Nf6 15.
Bf4 Qh5 16.Bxc7 Bh3 17.Bf4 Ng4 18.f3 exf3 19.Nxf3 Rad8 20.Qc1 Rfe8 21.Bxh3
Qxh3 22.Rd1 Nxh2 23.Rxd8 Nxf3+ 24.exf3 Rxd8 25.c3 Bh6 26.Qf1 Qxf1+ 27.Rxf1
Bxf4 28.gxf4 Rd2 29.Rf2 Rxf2 30.Kxf2 b5 31.a4 bxa4 32.Ke3 h5 33.f5 g5 34.
c4 f6 35.Kd4 Kf7 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.12"]
[Round "6"]
[White "Tatai, Stefano"]
[Black "Cardoso, Rodolfo Tan"]
[Result "1/2-1/2"]
[WhiteElo "2455"]
[BlackElo "2410"]
[ECO "B92"]
[EventDate "1975.04.06"]
[PlyCount "82"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5 7.Nb3 Be6 8.f4 Qc7
9.g4 b5 10.a3 Nc6 11.g5 Nd7 12.f5 Bxb3 13.cxb3 Nd4 14.Be3 Nxe2 15.Qxe2 h6 
16.Nd5 Qb7 17.Rc1 Rc8 18.O-O Be7 19.Rxc8+ Qxc8 20.f6 gxf6 21.gxf6 Rg8+ 22.
Kh1 Bd8 23.Bxh6 Rg6 24.Bg7 Nc5 25.Rg1 Qh3 26.b4 Nd3 27.Rxg6 fxg6 28.Qg2 
Qxg2+ 29.Kxg2 Kf7 30.b3 Nf4+ 31.Nxf4 exf4 32.Bh6 Bxf6 33.Bxf4 Ke6 34.Bc1 
d5 35.Kf3 dxe4+ 36.Kxe4 Bc3 37.h3 Be5 38.Bd2 Bb2 39.a4 Be5 40.Be1 Bg7 41.
Kf4 Bh6+ 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.12"]
[Round "6"]
[White "Rodriguez Vargas, Orestes"]
[Black "Larsen, Bent"]
[Result "1-0"]
[WhiteElo "2435"]
[BlackElo "2625"]
[ECO "E15"]
[EventDate "1975.04.06"]
[PlyCount "51"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Ba6 5.Qc2 c5 6.Bg2 Nc6 7.dxc5 bxc5 8.O-O 
Be7 9.Rd1 O-O 10.Qa4 Qb6 11.Nc3 Rad8 12.Bf4 d6 13.a3 Bb7 14.b4 Ng4 15.bxc5
Qxc5 16.Ne4 Qf5 17.Qb5 Qxe4 18.Qxb7 Rb8 19.Qa6 Rb6 20.Qa4 Qf5 21.h3 Nge5 
22.c5 Rb2 23.cxd6 Bf6 24.g4 Qg6 25.Nxe5 Nxe5 26.Be4 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.14"]
[Round "7"]
[White "Bellon Lopez, Juan Manuel"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[WhiteElo "2415"]
[BlackElo "2645"]
[ECO "B06"]
[EventDate "1975.04.06"]
[PlyCount "41"]

1.e4 g6 2.Nf3 Bg7 3.d4 d6 4.Nc3 Nd7 5.h3 c6 6.a4 a5 7.Be3 e6 8.Qd2 d5 9.
exd5 exd5 10.Bg5 f6 11.Bf4 Nf8 12.Bd3 h5 13.O-O-O Kf7 14.Kb1 b6 15.Rde1 
Ra7 16.Rhg1 Re7 17.Ne2 h4 18.Qc3 Re6 19.Bc1 Ne7 20.Nh2 Qd6 21.Bf4 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.14"]
[Round "7"]
[White "Cardoso, Rodolfo Tan"]
[Black "Pomar Salamanca, Arturo"]
[Result "1/2-1/2"]
[WhiteElo "2410"]
[BlackElo "2450"]
[ECO "D40"]
[EventDate "1975.04.06"]
[PlyCount "72"]

1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 e6 6.Nf3 Be7 7.Bd3 dxc4 8.Bxc4 
Nc6 9.O-O O-O 10.Be3 b6 11.Qe2 Bb7 12.Rfd1 Nd5 13.Nxd5 exd5 14.Bd3 Bf6 15.
Rac1 Re8 16.Qd2 Rc8 17.h3 Qd7 18.b4 Ne7 19.Bg5 Bxg5 20.Qxg5 f6 21.Qh4 Ng6 
22.Qh5 Rxc1 23.Rxc1 Nf8 24.Bb5 Qxb5 25.Rc7 Ng6 26.Rxb7 a5 27.bxa5 Qxa5 28.
Qf5 Qb5 29.Rd7 Qc6 30.Qxd5+ Qxd5 31.Rxd5 Ra8 32.Rb5 Rxa2 33.Rxb6 Nf4 34.
Rb3 Ra1+ 35.Kh2 Ra2 36.Kg1 Ra1+ 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.14"]
[Round "7"]
[White "Fernandez Fernandez, Angel"]
[Black "Tatai, Stefano"]
[Result "0-1"]
[WhiteElo "2300"]
[BlackElo "2455"]
[ECO "B95"]
[EventDate "1975.04.06"]
[PlyCount "112"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.Qf3 h6 8.Bxf6 
Qxf6 9.Qxf6 gxf6 10.O-O-O h5 11.h4 Nc6 12.Be2 Bd7 13.Nxc6 Bxc6 14.Bf3 Bh6+
15.Kb1 Bf4 16.Rd3 Be5 17.Rhd1 Ke7 18.Ne2 a5 19.Nd4 a4 20.a3 Ra5 21.c3 Rc5 
22.g3 Rc4 23.Nxc6+ bxc6 24.Bh1 Rb8 25.Kc2 d5 26.f4 Bd6 27.exd5 cxd5 28.Bf3
Rc5 29.Rb1 Rcb5 30.Rdd1 Rg8 31.Be2 Rb7 32.Rd3 Rgb8 33.Rdd1 Bc5 34.Bxh5 Rg8
35.Rd3 Rgb8 36.c4 dxc4 37.Rc3 Bd4 38.Rxc4 e5 39.Rxa4 Rc7+ 40.Kd3 Rb3+ 41.
Ke4 Rxg3 42.Rxd4 exd4 43.Kxd4 Rh3 44.Be2 Rxh4 45.Ke4 Rh2 46.Bb5 f5+ 47.Kd4
Rcc2 48.b3 Rh3 49.Bc4 Kd6 50.Bxf7 Rf2 51.Kc4 Rxf4+ 52.Kb5 Rd4 53.Rc1 f4 
54.a4 f3 55.Rf1 Rf4 56.Bc4 f2 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.14"]
[Round "7"]
[White "Mecking, Henrique"]
[Black "Hort, Vlastimil"]
[Result "1-0"]
[WhiteElo "2610"]
[BlackElo "2600"]
[ECO "B17"]
[EventDate "1975.04.06"]
[PlyCount "77"]

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Bc4 Ngf6 6.Ng5 e6 7.Qe2 Nb6 8.Bd3 
h6 9.N5f3 c5 10.dxc5 Bxc5 11.Ne5 Nbd7 12.Ngf3 Nxe5 13.Nxe5 O-O 14.O-O b6 
15.Bf4 Bb7 16.Rad1 Qe7 17.c3 Rfd8 18.Rd2 Bd6 19.Rfd1 Rac8 20.Ba6 Bxa6 21.
Qxa6 Ne4 22.Rd4 Qf6 23.Nd3 Bxf4 24.Nxf4 e5 25.Rxd8+ Rxd8 26.Rxd8+ Qxd8 27.
Nd3 Qd5 28.Ne1 Kh7 29.Qe2 Nd6 30.b3 f5 31.c4 Qd4 32.h3 e4 33.Nc2 Qb2 34.
Qd1 Nf7 35.Ne3 Qe5 36.Qd7 Nd6 37.g3 a5 38.Nd5 Kg6 39.Qc6 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.14"]
[Round "7"]
[White "Olafsson, Fridrik"]
[Black "Rodriguez Vargas, Orestes"]
[Result "1-0"]
[WhiteElo "2535"]
[BlackElo "2435"]
[ECO "A77"]
[EventDate "1975.04.06"]
[PlyCount "83"]

1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.d5 exd5 5.cxd5 g6 6.Nc3 d6 7.Nd2 Nbd7 8.e4 Bg7
9.Be2 O-O 10.O-O a6 11.a4 Re8 12.h3 Rb8 13.Qc2 Qc7 14.a5 b5 15.axb6 Nxb6 
16.Nb3 Nfd7 17.Na5 Ra8 18.Ra3 Nf8 19.Bd3 Nfd7 20.Rd1 Ne5 21.Be2 f5 22.f4 
Nf7 23.Bf3 fxe4 24.Nxe4 Qe7 25.Rb3 Qc7 26.Re3 Bd7 27.Ra3 Rac8 28.Be3 Bf5 
29.Nc6 a5 30.Rxa5 Nxd5 31.Rxd5 Bxe4 32.Bxe4 Qxc6 33.Rdxc5 Qxe4 34.Qxe4 
dxc5 35.Qb7 Rb8 36.Qa7 Nd6 37.Bxc5 Nf5 38.b4 Rxb4 39.Qd7 Rbb8 40.Ra7 h5 
41.Qf7+ Kh7 42.Ra6 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.14"]
[Round "7"]
[White "Tal, Mikhail"]
[Black "Debarnot, Roberto Luis"]
[Result "1-0"]
[WhiteElo "2645"]
[BlackElo "2380"]
[ECO "C07"]
[EventDate "1975.04.06"]
[PlyCount "71"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.Ngf3 Nc6 5.Bb5 a6 6.exd5 axb5 7.dxc6 bxc6 8.
dxc5 Bxc5 9.Qe2 Nf6 10.Nb3 Bb4+ 11.c3 Bd6 12.Nbd4 Qc7 13.Nf5 Bf4 14.Bxf4 
Qxf4 15.N5d4 Bd7 16.Ne5 Ra6 17.Rd1 O-O 18.g3 Qh6 19.O-O Be8 20.a3 Qh5 21.
Qxh5 Nxh5 22.Nb3 f6 23.Nd7 Bxd7 24.Rxd7 Re8 25.Rc7 e5 26.Rd1 Raa8 27.Rxc6 
Rad8 28.Rcd6 Rxd6 29.Rxd6 Rb8 30.Kf1 Kf7 31.Rd7+ Kg6 32.Ke2 f5 33.Rd5 Kf6 
34.Nc5 Rc8 35.Nd3 e4 36.Nb4 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.14"]
[Round "7"]
[White "Visier Segovia, Fernando"]
[Black "Ljubojevic, Ljubomir"]
[Result "0-1"]
[WhiteElo "2375"]
[BlackElo "2615"]
[ECO "E74"]
[EventDate "1975.04.06"]
[PlyCount "54"]

1.d4 Nf6 2.c4 e6 3.Nc3 c5 4.d5 exd5 5.cxd5 g6 6.Nf3 Bg7 7.Bf4 Qa5 8.Bd2 
O-O 9.e4 Re8 10.Be2 d6 11.O-O Bg4 12.Qc2 Nbd7 13.h3 Bxf3 14.Bxf3 c4 15.a4 
Nc5 16.e5 Rxe5 17.Ne4 Qb6 18.Nxf6+ Bxf6 19.Qxc4 Nb3 20.Bc3 Nxa1 21.Bxe5 
Bxe5 22.Rxa1 Qxb2 23.Rd1 Re8 24.g3 Kg7 25.Rd3 Bxg3 26.Qc3+ Qxc3 27.Rxc3 
Bh4 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.15"]
[Round "8"]
[White "Andersson, Ulf"]
[Black "Hort, Vlastimil"]
[Result "1-0"]
[WhiteElo "2565"]
[BlackElo "2600"]
[ECO "A06"]
[EventDate "1975.04.06"]
[PlyCount "79"]

1.Nf3 c5 2.b3 d5 3.e3 Nf6 4.Bb2 Bg4 5.h3 Bxf3 6.Qxf3 Nc6 7.Bb5 Rc8 8.c4 
dxc4 9.bxc4 e6 10.Bxf6 Qxf6 11.Qxf6 gxf6 12.Nc3 Kd8 13.Bxc6 Rxc6 14.Rb1 
Kc8 15.Ke2 f5 16.g4 Bg7 17.Nb5 Kb8 18.gxf5 exf5 19.Rhg1 Bf6 20.Rg3 a6 21.
Na3 Be5 22.Rg5 Rf6 23.Nc2 Re8 24.Ne1 Bd6 25.Nf3 f4 26.Rd5 Kc7 27.a4 Kc6 
28.a5 fxe3 29.Rb6+ Kc7 30.fxe3 h6 31.Rxc5+ Kb8 32.Rd5 Kc7 33.Nd4 Rg6 34.
Rf5 f6 35.Rd5 Be5 36.Rc5+ Kd8 37.Nf3 Rg2+ 38.Kd3 Re7 39.Nxe5 fxe5 40.Rxh6 
1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.15"]
[Round "8"]
[White "Debarnot, Roberto Luis"]
[Black "Cardoso, Rodolfo Tan"]
[Result "0-1"]
[WhiteElo "2380"]
[BlackElo "2410"]
[ECO "B51"]
[EventDate "1975.04.06"]
[PlyCount "142"]

1.e4 c5 2.Nf3 d6 3.Bb5+ Nc6 4.O-O Bd7 5.Re1 a6 6.Bxc6 bxc6 7.b3 e5 8.c3 
Ne7 9.d4 cxd4 10.cxd4 Ng6 11.Nbd2 Qc7 12.Ba3 Rd8 13.Qe2 Bc8 14.Rac1 Bb7 
15.Nc4 Be7 16.Bb4 Qb8 17.Ba5 Rc8 18.dxe5 dxe5 19.Red1 c5 20.Nb6 Rd8 21.
Rxd8+ Bxd8 22.Rxc5 Bxb6 23.Bxb6 Qd6 24.Ba7 O-O 25.Rc1 Nf4 26.Qe3 Qg6 27.g3
Nh3+ 28.Kf1 f6 29.Nd2 f5 30.Rc7 Bxe4 31.Nxe4 fxe4 32.Qd2 Qe6 33.Be3 h6 34.
Qd7 Qxd7 35.Rxd7 Nxf2 36.Bc5 Rf6 37.Ke2 Nd3 38.Be3 Rc6 39.Kd2 Kf8 40.Rb7 
Kg8 41.Rb6 Rxb6 42.Bxb6 Nb4 43.Bc7 e3+ 44.Ke2 Nxa2 45.Bxe5 Nc1+ 46.Kxe3 
Nxb3 47.Bd6 Na5 48.Ke4 Nb7 49.Ba3 Kf7 50.g4 Ke6 51.Bf8 Nd6+ 52.Kd4 Ne8 53.
Bb4 Nf6 54.h3 Nh7 55.h4 Kf7 56.Bd2 Nf8 57.Kc5 Nd7+ 58.Kd4 Ke6 59.Bf4 a5 
60.h5 Kf6 61.Kd5 a4 62.Bc1 Nf8 63.Bb2+ Kf7 64.Kc4 Nd7 65.Kb4 Nf6 66.g5 
hxg5 67.Kxa4 g4 68.Kb3 g3 69.Kc2 g2 70.Bd4 Nxh5 71.Kd2 Nf4 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.15"]
[Round "8"]
[White "Ljubojevic, Ljubomir"]
[Black "Tal, Mikhail"]
[Result "1/2-1/2"]
[WhiteElo "2615"]
[BlackElo "2645"]
[ECO "B81"]
[EventDate "1975.04.06"]
[PlyCount "65"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.g4 a6 7.g5 Nfd7 8.h4 b5 
9.h5 b4 10.Nce2 Bb7 11.Bg2 Nc5 12.Ng3 Nbd7 13.f4 Be7 14.Qg4 h6 15.g6 O-O 
16.gxf7+ Rxf7 17.Be3 Qc7 18.O-O Bf6 19.Nxe6 Nxe6 20.Qxe6 Bxb2 21.Rad1 Nf6 
22.Qxd6 Ng4 23.Bb6 Qxc2 24.Qe6 Nf6 25.Nf5 Re8 26.Rd8 Rxd8 27.Bxd8 Bxe4 28.
Bxe4 Nxe4 29.Bb6 Qd3 30.Re1 Nd6 31.Nxd6 Qg3+ 32.Kh1 Qf3+ 33.Kg1 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.15"]
[Round "8"]
[White "Petrosian, Tigran"]
[Black "Mecking, Henrique"]
[Result "1/2-1/2"]
[WhiteElo "2645"]
[BlackElo "2610"]
[ECO "A12"]
[EventDate "1975.04.06"]
[PlyCount "35"]

1.Nf3 Nf6 2.c4 c6 3.b3 d5 4.Bb2 Bg4 5.e3 Nbd7 6.Be2 e6 7.O-O Bd6 8.cxd5 
cxd5 9.Nd4 Bxe2 10.Qxe2 O-O 11.f4 Rc8 12.Nc3 a6 13.Rfc1 Qe7 14.a3 Rfe8 15.
b4 Bb8 16.Nf3 e5 17.fxe5 Nxe5 18.Na4 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.15"]
[Round "8"]
[White "Pomar Salamanca, Arturo"]
[Black "Fernandez Fernandez, Angel"]
[Result "1/2-1/2"]
[WhiteElo "2450"]
[BlackElo "2300"]
[ECO "E43"]
[EventDate "1975.04.06"]
[PlyCount "90"]

1.d4 e6 2.c4 Nf6 3.Nc3 Bb4 4.e3 b6 5.Nf3 Ne4 6.Qc2 Bb7 7.Bd3 f5 8.O-O Bxc3
9.bxc3 O-O 10.a4 d6 11.a5 Nd7 12.a6 Bc6 13.d5 exd5 14.Nd4 Ne5 15.Nxc6 Nxc6
16.cxd5 Ne5 17.Bxe4 fxe4 18.Qxe4 Qf6 19.f4 Rae8 20.Qd4 Ng4 21.Qd3 Qf5 22.
Qxf5 Rxf5 23.h3 Nf6 24.c4 h5 25.Bd2 Re4 26.Rfc1 Nd7 27.Kf2 Ne5 28.Ra2 Rxc4
29.Rxc4 Nxc4 30.e4 Rf7 31.Kf3 c6 32.dxc6 Rc7 33.Bc3 Rxc6 34.Bd4 Na5 35.Rb2
Kf7 36.Rb5 g6 37.g4 hxg4+ 38.hxg4 Rc4 39.Bxb6 axb6 40.Rxb6 Ra4 41.a7 Nc4 
42.Rb4 Ra3+ 43.Ke2 Ne5 44.Rb7+ Ke6 45.fxe5 Kxe5 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.15"]
[Round "8"]
[White "Rodriguez Vargas, Orestes"]
[Black "Visier Segovia, Fernando"]
[Result "1-0"]
[WhiteElo "2435"]
[BlackElo "2375"]
[ECO "E14"]
[EventDate "1975.04.06"]
[PlyCount "61"]

1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.e3 cxd4 5.exd4 b6 6.Bd3 Bb7 7.O-O Be7 8.Nc3 d5
9.cxd5 Nxd5 10.Qe2 O-O 11.Bd2 Nc6 12.Rad1 Rc8 13.Bb1 Ncb4 14.Ne5 Nxc3 15.
bxc3 Nd5 16.c4 Nf6 17.Bf4 Ba6 18.Bd3 Nd7 19.Nc6 Qe8 20.Nxa7 Ra8 21.Nc6 Bb7
22.Nxe7+ Qxe7 23.Rb1 Qf6 24.Qe3 h6 25.c5 Rxa2 26.Rfc1 Rc8 27.Bb5 e5 28.
Bxd7 exf4 29.Qe5 Qg6 30.c6 Rc2 31.d5 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.15"]
[Round "8"]
[White "Tatai, Stefano"]
[Black "Bellon Lopez, Juan Manuel"]
[Result "1-0"]
[WhiteElo "2455"]
[BlackElo "2415"]
[ECO "B00"]
[EventDate "1975.04.06"]
[PlyCount "70"]

1.e4 c5 2.Nf3 a6 3.c3 b5 4.d4 e6 5.Bd3 Bb7 6.O-O d5 7.e5 Nc6 8.Nbd2 Qc7 9.
dxc5 Bxc5 10.Nb3 Bf8 11.Qe2 g6 12.Be3 Nge7 13.Bd4 Bh6 14.h4 O-O 15.Nh2 Bg7
16.Rfe1 Nf5 17.h5 Rae8 18.Nf3 Nfxd4 19.cxd4 f5 20.hxg6 hxg6 21.Qd2 Qe7 22.
a4 bxa4 23.Rxa4 Rb8 24.Nc5 a5 25.Bb5 f4 26.Qc2 Na7 27.Qxg6 Qf7 28.Qxf7+ 
Rxf7 29.Rxa5 Bc6 30.Bd3 Re7 31.Ra6 Bb5 32.Bxb5 Rxb5 33.Rea1 Nc8 34.Ra8 Re8
35.Nxe6 Rxb2 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.16"]
[Round "9"]
[White "Olafsson, Fridrik"]
[Black "Andersson, Ulf"]
[Result "1/2-1/2"]
[WhiteElo "2535"]
[BlackElo "2565"]
[ECO "E12"]
[EventDate "1975.04.06"]
[PlyCount "83"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 c5 5.d5 exd5 6.cxd5 g6 7.Nc3 Bg7 8.e4 O-O 
9.Bg5 d6 10.Nd2 Re8 11.Be2 a6 12.a4 Nbd7 13.O-O Qc7 14.Kh1 h6 15.Bh4 g5 
16.Bg3 Ne5 17.f4 gxf4 18.Bxf4 Nfd7 19.Bg3 Rb8 20.Rc1 Nf8 21.Rf2 Nfg6 22.
Nf1 b5 23.axb5 axb5 24.Bxb5 Rxb5 25.Nxb5 Qb6 26.Na3 Ba6 27.Rd2 Qb4 28.Qc2 
h5 29.Rdd1 Ng4 30.h3 Nf6 31.Be1 Qxe4 32.Qxe4 Nxe4 33.Nc4 Bxb2 34.Nxb2 Bxf1
35.Rc2 Bb5 36.Ra1 Nf6 37.Bg3 Rd8 38.Nc4 Bxc4 39.Rxc4 Nxd5 40.Ra6 Ne3 41.
Rc1 Nf5 42.Bh2 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.16"]
[Round "9"]
[White "Tal, Mikhail"]
[Black "Rodriguez Vargas, Orestes"]
[Result "1-0"]
[WhiteElo "2645"]
[BlackElo "2435"]
[ECO "B19"]
[EventDate "1975.04.06"]
[PlyCount "47"]

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 Ngf6 11.Bf4 Nd5 12.Bd2 e6 13.c4 Nb4 14.Qb3 a5 15.a3 a4 
16.Qd1 Na6 17.Qxa4 Bd6 18.Ne4 Bc7 19.Qc2 f5 20.Nc3 Nf6 21.Ne2 O-O 22.Bf4 
Ba5+ 23.Kf1 Qe8 24.Bd6 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.16"]
[Round "9"]
[White "Bellon Lopez, Juan Manuel"]
[Black "Pomar Salamanca, Arturo"]
[Result "1-0"]
[WhiteElo "2415"]
[BlackElo "2450"]
[ECO "C47"]
[EventDate "1975.04.06"]
[PlyCount "43"]

1.e4 Nf6 2.Nc3 e5 3.Nf3 Nc6 4.d4 exd4 5.Nd5 Be7 6.Bf4 d6 7.Nxd4 O-O 8.Nb5 
Nxd5 9.exd5 Bg5 10.Bxg5 Qxg5 11.Qd2 Re8+ 12.Kd1 Bg4+ 13.f3 Re3 14.dxc6 
Rae8 15.cxb7 Rxf3 16.Be2 Qxd2+ 17.Kxd2 Rf2 18.Rae1 Rfxe2+ 19.Rxe2 Rxe2+ 
20.Kc3 Re8 21.Re1 Rb8 22.Re7 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.16"]
[Round "9"]
[White "Cardoso, Rodolfo Tan"]
[Black "Ljubojevic, Ljubomir"]
[Result "0-1"]
[WhiteElo "2410"]
[BlackElo "2615"]
[ECO "B99"]
[EventDate "1975.04.06"]
[PlyCount "82"]

1.e4 c5 2.Nf3 d6 3.d4 Nf6 4.Nc3 cxd4 5.Nxd4 a6 6.Bg5 e6 7.f4 Nbd7 8.Qf3 
Qc7 9.O-O-O Be7 10.g4 b5 11.Bxf6 Nxf6 12.f5 b4 13.g5 bxc3 14.gxf6 Bxf6 15.
fxe6 cxb2+ 16.Kb1 O-O 17.exf7+ Rxf7 18.Qb3 Rb8 19.Ne6 Rxb3 20.Nxc7 Rb4 21.
Nd5 Rxe4 22.Nxf6+ Rxf6 23.Kxb2 a5 24.a3 Kf7 25.Rd2 Ref4 26.Bg2 Rf2 27.Rxf2
Rxf2 28.Rf1 Rxf1 29.Bxf1 Kf6 30.Kb3 Bd7 31.Kc4 Ke5 32.Bg2 g5 33.c3 g4 34.
Kd3 h5 35.Ke3 h4 36.Bb7 Be6 37.Bc6 Bf5 38.Bb5 Be4 39.Bd7 Bf5 40.Bb5 Bc8 
41.Be2 Be6 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.16"]
[Round "9"]
[White "Fernandez Fernandez, Angel"]
[Black "Debarnot, Roberto Luis"]
[Result "0-1"]
[WhiteElo "2300"]
[BlackElo "2380"]
[ECO "C08"]
[EventDate "1975.04.06"]
[PlyCount "58"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5 5.dxc5 Bxc5 6.Bb5+ Nc6 7.Qe2+ Ne7 8.
Nb3 Bd6 9.Bg5 O-O 10.O-O-O Qc7 11.Bxe7 Bxe7 12.Nf3 a6 13.Bd3 Bg4 14.Kb1 
Bf6 15.h3 Rfe8 16.Bxh7+ Kf8 17.Qd2 Bxf3 18.gxf3 Qe5 19.c3 g6 20.Qh6+ Bg7 
21.Qh4 Qf5+ 22.Ka1 Re2 23.Nc1 Rc2 24.Nd3 Qxf3 25.Rhe1 Re8 26.Qa4 Rxe1 27.
Rxe1 Rxc3 28.Qf4 Qxf4 29.Nxf4 Rf3 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.16"]
[Round "9"]
[White "Hort, Vlastimil"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[WhiteElo "2600"]
[BlackElo "2645"]
[ECO "B81"]
[EventDate "1975.04.06"]
[PlyCount "46"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.g4 a6 7.g5 Nfd7 8.Be3 b5 
9.a3 Bb7 10.h4 Nc6 11.Nxc6 Bxc6 12.Qd4 Qb8 13.Bg2 Ne5 14.a4 b4 15.Ne2 a5 
16.Ng3 Nd7 17.b3 Qc7 18.Rd1 Bb7 19.Rd2 Ba6 20.Qa1 Rc8 21.Bf1 Qb7 22.Bxa6 
Qxa6 23.Ne2 e5 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.16"]
[Round "9"]
[White "Mecking, Henrique"]
[Black "Tatai, Stefano"]
[Result "1-0"]
[WhiteElo "2610"]
[BlackElo "2455"]
[ECO "C11"]
[EventDate "1975.04.06"]
[PlyCount "103"]

1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.f4 c5 6.c3 Nc6 7.Ndf3 Qa5 8.dxc5 
Qxc5 9.Ne2 Qb6 10.Ned4 Nc5 11.Rb1 a6 12.Be3 Qc7 13.Be2 Be7 14.O-O O-O 15.
Rc1 b5 16.Nb3 Na4 17.Qc2 f5 18.exf6 gxf6 19.Nbd4 Nd8 20.Nh4 Rf7 21.Kh1 Nc5
22.Bh5 Rg7 23.f5 e5 24.Bh6 Bf8 25.Bxg7 Qxg7 26.Bf3 Qf7 27.b4 Na4 28.Ne6 
Bb7 29.Nxf8 Qxf8 30.Qd2 Nb6 31.Be2 Nf7 32.Qe3 Nd7 33.Nf3 Kh8 34.Ra1 Bc6 
35.a4 bxa4 36.Bd1 Bb5 37.Re1 d4 38.cxd4 Qxb4 39.Qa3 Qxa3 40.Rxa3 Nb6 41.
dxe5 fxe5 42.g4 Rd8 43.Bc2 Nc4 44.Rc3 Rg8 45.h3 h5 46.Rg1 Ncd6 47.Kh2 e4 
48.Nd4 hxg4 49.hxg4 Ng5 50.Kg3 Re8 51.Kf4 Ndf7 52.Ra1 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.18"]
[Round "10"]
[White "Andersson, Ulf"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[WhiteElo "2565"]
[BlackElo "2645"]
[ECO "A14"]
[EventDate "1975.04.06"]
[PlyCount "30"]

1.c4 Nf6 2.Nf3 e6 3.g3 d5 4.Bg2 Be7 5.O-O O-O 6.b3 b6 7.Bb2 Bb7 8.d3 c5 9.
e3 Nc6 10.Qe2 Qc7 11.Nc3 dxc4 12.dxc4 Rad8 13.Rfd1 Qb8 14.Rxd8 Rxd8 15.Rd1
Qa8 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.18"]
[Round "10"]
[White "Debarnot, Roberto Luis"]
[Black "Bellon Lopez, Juan Manuel"]
[Result "1/2-1/2"]
[WhiteElo "2380"]
[BlackElo "2415"]
[ECO "A09"]
[EventDate "1975.04.06"]
[PlyCount "110"]

1.Nf3 d5 2.c4 d4 3.e3 Nc6 4.exd4 Nxd4 5.Nxd4 Qxd4 6.d3 e5 7.Nc3 Bc5 8.Be3 
Qd6 9.Qd2 Nf6 10.Be2 O-O 11.O-O-O Rd8 12.Nb5 Qe7 13.Bxc5 Qxc5 14.Qe3 Qxe3+
15.fxe3 c6 16.Nc3 Bg4 17.h3 Bxe2 18.Nxe2 Rd6 19.Kc2 g6 20.Nc3 Rad8 21.b4 
Ne8 22.Ne4 Re6 23.g4 Nd6 24.Nxd6 Rexd6 25.Rhf1 Kg7 26.Kc3 f6 27.Rf2 h5 28.
gxh5 Rh8 29.hxg6 Rxh3 30.e4 Rd4 31.Kc2 b5 32.cxb5 cxb5 33.a3 Kxg6 34.Rg1+ 
Kf7 35.Rgf1 Rd6 36.Rf3 Rh8 37.R1f2 Rh6 38.Kb3 Rh1 39.d4 Rh5 40.d5 Rh4 41.
Re3 a6 42.Rf1 Ke7 43.Rg1 Rd7 44.Rc1 Rf4 45.a4 f5 46.Rc6 Rd6 47.axb5 axb5 
48.Rc7+ Rd7 49.Rc6 Rd6 50.exf5 Rxd5 51.Re6+ Kd7 52.R6xe5 Rxf5 53.Re7+ Kc6 
54.Rc3+ Kd6 55.Rec7 Rf3 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.18"]
[Round "10"]
[White "Ljubojevic, Ljubomir"]
[Black "Fernandez Fernandez, Angel"]
[Result "1-0"]
[WhiteElo "2615"]
[BlackElo "2300"]
[ECO "C10"]
[EventDate "1975.04.06"]
[PlyCount "91"]

1.e4 e6 2.d4 d5 3.Nc3 Nc6 4.Nf3 Nf6 5.Bg5 h6 6.Bxf6 gxf6 7.exd5 exd5 8.Bb5
Qd6 9.O-O Rg8 10.Re1+ Be6 11.Ne2 O-O-O 12.c3 Ne7 13.Bd3 Ng6 14.Qc2 Nf4 15.
Nxf4 Qxf4 16.Re3 h5 17.Ne1 Bd6 18.g3 h4 19.Ng2 Qg5 20.Rf1 Rg7 21.Kh1 Bh3 
22.Nxh4 Bxf1 23.Bxf1 Rh8 24.Nf5 Rgh7 25.h4 Qg4 26.Bg2 Rh5 27.Nxd6+ cxd6 
28.Kg1 Qd7 29.Bf3 R5h6 30.Bxd5 f5 31.Rf3 Rh5 32.Rf4 Re8 33.Bf3 Rh6 34.Qxf5
Qxf5 35.Rxf5 f6 36.Kf1 Kd7 37.Bxb7 Rb8 38.Rb5 Rhh8 39.a4 Kc7 40.Be4 Rxb5 
41.axb5 Kb6 42.Bd3 d5 43.Ke2 Ka5 44.b3 Rc8 45.Kd2 Re8 46.h5 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.18"]
[Round "10"]
[White "Olafsson, Fridrik"]
[Black "Visier Segovia, Fernando"]
[Result "1/2-1/2"]
[WhiteElo "2535"]
[BlackElo "2375"]
[ECO "E90"]
[EventDate "1975.04.06"]
[PlyCount "82"]

1.c4 Nf6 2.Nf3 g6 3.Nc3 Bg7 4.e4 d6 5.d4 O-O 6.h3 e5 7.d5 Nbd7 8.Bd3 Nh5 
9.g3 Nc5 10.Bc2 a5 11.Be3 b6 12.Qe2 f5 13.exf5 Bxf5 14.O-O-O Bxc2 15.Kxc2 
Qf6 16.Ng5 Bh6 17.h4 Qf5+ 18.Kc1 Nf6 19.f3 e4 20.f4 Rae8 21.Nb5 Re7 22.Kb1
Qg4 23.Rh2 Qxe2 24.Rxe2 Bxg5 25.hxg5 Ng4 26.Nd4 h6 27.gxh6 Rh7 28.Nb5 Na6 
29.Rde1 Rxh6 30.Bd4 Re8 31.a3 Rh3 32.Rxe4 Rxe4 33.Rxe4 Kf7 34.Na7 Rxg3 35.
Nc6 Nh6 36.Nd8+ Kf8 37.Ne6+ Kf7 38.Ng5+ Kf8 39.Re6 Nf5 40.Rxg6 Rxg5 41.
Rf6+ Kg8 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.18"]
[Round "10"]
[White "Pomar Salamanca, Arturo"]
[Black "Mecking, Henrique"]
[Result "1/2-1/2"]
[WhiteElo "2450"]
[BlackElo "2610"]
[ECO "E95"]
[EventDate "1975.04.06"]
[PlyCount "47"]

1.d4 g6 2.Nf3 Bg7 3.c4 d6 4.Nc3 Nd7 5.e4 e5 6.Be2 Ngf6 7.O-O O-O 8.Re1 c6 
9.Bf1 exd4 10.Nxd4 Ng4 11.Qxg4 Bxd4 12.Qg3 Nf6 13.Bg5 h6 14.Be3 Be5 15.Qh4
Ng4 16.Qxd8 Rxd8 17.Bd2 Nxh2 18.Be2 Ng4 19.f3 Bd4+ 20.Kh1 Ne5 21.Bxh6 Be6 
22.Rad1 Bxc3 23.bxc3 Bxc4 24.Bg5 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.18"]
[Round "10"]
[White "Rodriguez Vargas, Orestes"]
[Black "Cardoso, Rodolfo Tan"]
[Result "1-0"]
[WhiteElo "2435"]
[BlackElo "2410"]
[ECO "E54"]
[EventDate "1975.04.06"]
[PlyCount "115"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Nf3 d5 6.Bd3 c5 7.O-O cxd4 8.exd4 
dxc4 9.Bxc4 b6 10.Qd3 Bb7 11.Bg5 Be7 12.Rfe1 Nbd7 13.Rad1 Rc8 14.Bb3 Qc7 
15.Nb5 Qb8 16.Ne5 Bb4 17.Nxd7 Nxd7 18.Re3 Rfe8 19.Nc3 Bxc3 20.bxc3 Qa8 21.
Bc2 Nf8 22.Rg3 f5 23.Qe2 Bd5 24.h4 Bc4 25.Qe3 Rc7 26.h5 Rf7 27.a3 Qd5 28.
Re1 Rc8 29.Bf4 Nd7 30.Rg5 Nf6 31.Qh3 Bb3 32.Bb1 Qa5 33.Be5 Rxc3 34.f3 Ng4 
35.Qh4 Nxe5 36.Rxe5 Qxa3 37.Bxf5 Rc1+ 38.Kh2 Qe7 39.Bg6 Rf6 40.Be4 h6 41.
Rg6 Rd1 42.Bc6 Kf8 43.Qe4 Qd8 44.Rg4 Kg8 45.Qe3 Bc4 46.Qc3 Ba6 47.d5 Qc7 
48.f4 Rd3 49.Qe1 Bc8 50.Qe4 Rd2 51.dxe6 Qe7 52.f5 Rd8 53.Rf4 Ba6 54.Qb4 
Kf8 55.Qxe7+ Kxe7 56.Rg4 Rg8 57.Rd4 Bc8 58.Rd7+ 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.18"]
[Round "10"]
[White "Tatai, Stefano"]
[Black "Hort, Vlastimil"]
[Result "0-1"]
[WhiteElo "2455"]
[BlackElo "2600"]
[ECO "C02"]
[EventDate "1975.04.06"]
[PlyCount "60"]

1.e4 c5 2.Nf3 e6 3.c3 d5 4.e5 Qb6 5.Be2 Nc6 6.d4 cxd4 7.cxd4 Nge7 8.b3 Nf5
9.Bb2 Bd7 10.Kf1 h5 11.h4 Be7 12.Nc3 a6 13.Na4 Qa7 14.Rc1 Rc8 15.a3 b5 16.
Nc5 Nfxd4 17.Nxd4 Bxc5 18.Nxc6 Rxc6 19.Bxh5 Bxf2 20.Rxc6 Bxc6 21.Qc2 Rxh5 
22.Qxc6+ Kf8 23.Qc8+ Ke7 24.g4 Rh8 25.Qc2 Be3 26.Bc3 Rc8 27.Rh3 Qc5 28.Ke2
Qxc3 29.Qxc3 Rxc3 30.Rxe3 Rxe3+ 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.19"]
[Round "11"]
[White "Bellon Lopez, Juan Manuel"]
[Black "Ljubojevic, Ljubomir"]
[Result "1/2-1/2"]
[WhiteElo "2415"]
[BlackElo "2615"]
[ECO "A30"]
[EventDate "1975.04.06"]
[PlyCount "67"]

1.Nf3 c5 2.c4 Nf6 3.Nc3 e6 4.g3 b6 5.Bg2 Bb7 6.O-O Be7 7.Re1 O-O 8.e4 a6 
9.d4 cxd4 10.Nxd4 Ra7 11.b3 d6 12.a4 Nbd7 13.Ba3 Qa8 14.Ra2 Rc8 15.f4 Nc5 
16.Qe2 Bf8 17.b4 Ncd7 18.Rc2 Qb8 19.Nb3 Ba8 20.Rf1 Rac7 21.Nd1 Qa7 22.Nf2 
e5 23.Bb2 Re8 24.Qd3 Bc6 25.Ra1 Qa8 26.f5 Rec8 27.b5 Bb7 28.Rac1 h6 29.Rc3
Rd8 30.Rd1 Be7 31.Qc2 Rdc8 32.Rc1 Rd8 33.Rd1 Rdc8 34.Rc1 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.19"]
[Round "11"]
[White "Fernandez Fernandez, Angel"]
[Black "Rodriguez Vargas, Orestes"]
[Result "1-0"]
[WhiteElo "2300"]
[BlackElo "2435"]
[ECO "B95"]
[EventDate "1975.04.06"]
[PlyCount "43"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Be2 Be7 8.Qd2 
a6 9.O-O O-O 10.Rad1 Bd7 11.Nf3 Qa5 12.b4 Qxb4 13.Rb1 Qa5 14.Rxb7 Bc8 15.
Rxe7 Rd8 16.e5 dxe5 17.Bxf6 gxf6 18.Qh6 Nxe7 19.Ne4 Nd5 20.Rd1 Rb8 21.Rxd5
Rb1+ 22.Bf1 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.19"]
[Round "11"]
[White "Hort, Vlastimil"]
[Black "Pomar Salamanca, Arturo"]
[Result "1-0"]
[WhiteElo "2600"]
[BlackElo "2450"]
[ECO "B19"]
[EventDate "1975.04.06"]
[PlyCount "113"]

1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.h5 Bh7 8.Nf3 Nd7
9.Bd3 Bxd3 10.Qxd3 Qc7 11.Bd2 e6 12.Qe2 Ngf6 13.O-O-O O-O-O 14.Ne5 Nb6 15.
Ba5 Rd5 16.Bxb6 axb6 17.c4 Rd8 18.Nf3 Bd6 19.Ne4 Nxe4 20.Qxe4 Rhe8 21.Kb1 
Kb8 22.Rd3 Be7 23.Rhd1 Bf6 24.Qg4 c5 25.dxc5 bxc5 26.Qg3 e5 27.Rxd8+ Rxd8 
28.Rxd8+ Qxd8 29.Kc2 Ka8 30.Qg4 Qe8 31.Nd2 Qa4+ 32.Kb1 Qb4 33.Qe2 e4 34.
Nxe4 Bxb2 35.Nxc5 Be5+ 36.Nb3 Qc3 37.Qd2 Qxd2 38.Nxd2 Ka7 39.Kc2 Kb6 40.
Kd3 Kc5 41.Nb3+ Kc6 42.Ke4 Bf6 43.Kf5 b6 44.f4 Bc3 45.g4 Kd6 46.g5 hxg5 
47.fxg5 Ke7 48.c5 bxc5 49.Nxc5 Bd2 50.a4 Be3 51.Ne4 Kd7 52.g6 Ke7 53.a5 
Bd4 54.gxf7 Kxf7 55.Nd6+ Ke7 56.Nb5 Bc5 57.a6 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.19"]
[Round "11"]
[White "Mecking, Henrique"]
[Black "Debarnot, Roberto Luis"]
[Result "1-0"]
[WhiteElo "2610"]
[BlackElo "2380"]
[ECO "C14"]
[EventDate "1975.04.06"]
[PlyCount "79"]

1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 Be7 5.e5 Nfd7 6.Bxe7 Qxe7 7.f4 O-O 8.Nf3 
c5 9.dxc5 Qxc5 10.Qd2 Nc6 11.O-O-O a6 12.Bd3 b5 13.g4 Re8 14.Ng5 Nf8 15.
Kb1 Bd7 16.Rc1 Rec8 17.Nf3 Na5 18.f5 Rab8 19.f6 Nc4 20.Bxc4 bxc4 21.Ka1 
Rb4 22.Rhf1 Rcb8 23.fxg7 Kxg7 24.Qg5+ Ng6 25.Qf6+ Kg8 26.Ng5 Be8 27.Nxf7 
Bxf7 28.Qxf7+ Kh8 29.Qf6+ Kg8 30.Qxe6+ Kh8 31.Qf6+ Kg8 32.Qe6+ Kh8 33.Rf7 
R4b6 34.Qxd5 Qe3 35.Rd1 Qxe5 36.Qd8+ Qe8 37.Qd4+ Qe5 38.Qd8+ Qe8 39.Qc7 
Nf8 40.Rdf1 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.19"]
[Round "11"]
[White "Petrosian, Tigran"]
[Black "Tatai, Stefano"]
[Result "1-0"]
[WhiteElo "2645"]
[BlackElo "2455"]
[ECO "D32"]
[EventDate "1975.04.06"]
[PlyCount "69"]

1.c4 Nf6 2.Nc3 e6 3.d4 c5 4.e3 d5 5.Nf3 Nc6 6.cxd5 exd5 7.Be2 Be7 8.O-O 
O-O 9.b3 Ne4 10.Bb2 cxd4 11.Nxe4 dxe4 12.Nxd4 Qb6 13.Qc2 Nxd4 14.Bxd4 Qg6 
15.f4 Be6 16.Qb2 Rfc8 17.Rac1 a6 18.Rxc8+ Rxc8 19.Rc1 h5 20.Rxc8+ Bxc8 21.
Qc2 Bg4 22.Bxg4 Qxg4 23.h3 Qg3 24.Qc8+ Kh7 25.Qf5+ Qg6 26.Qd7 Bh4 27.Qxb7 
Qg3 28.Qxe4+ g6 29.Qb1 Qf2+ 30.Kh1 Bg3 31.Qa1 Qe2 32.Bh8 f6 33.Bxf6 Qxe3 
34.Bh8 Qe7 35.Be5 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.19"]
[Round "11"]
[White "Tal, Mikhail"]
[Black "Olafsson, Fridrik"]
[Result "0-1"]
[WhiteElo "2645"]
[BlackElo "2535"]
[ECO "B06"]
[EventDate "1975.04.06"]
[PlyCount "50"]

1.e4 d6 2.d4 g6 3.Bc4 Nf6 4.Qe2 Nc6 5.Nf3 Bg4 6.c3 e5 7.Bb5 exd4 8.cxd4 
Nd7 9.Be3 Bg7 10.Bxc6 bxc6 11.Nbd2 O-O 12.Rc1 c5 13.dxc5 Bxb2 14.Rc2 Bg7 
15.O-O Re8 16.Rd1 Nxc5 17.Bxc5 dxc5 18.Rxc5 Qd6 19.Rdc1 Bh6 20.Rxc7 Rad8 
21.R1c2 Bxd2 22.Qxd2 Qf4 23.Re7 Rf8 24.Qa5 Rd1+ 25.Ne1 Qg5 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.19"]
[Round "11"]
[White "Visier Segovia, Fernando"]
[Black "Andersson, Ulf"]
[Result "0-1"]
[WhiteElo "2375"]
[BlackElo "2565"]
[ECO "E54"]
[EventDate "1975.04.06"]
[PlyCount "58"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 O-O 6.Nf3 d5 7.O-O dxc4 8.Bxc4 
Nbd7 9.Qe2 cxd4 10.exd4 Bxc3 11.bxc3 Qc7 12.Bb2 b6 13.Bd3 Bb7 14.c4 h6 15.
Ne5 Nxe5 16.dxe5 Qc6 17.f4 Nd7 18.Rf3 Qc5+ 19.Re3 Rfd8 20.Kh1 Nf8 21.Rg3 
Rd7 22.Rf1 Rad8 23.f5 Rxd3 24.Rxd3 Qxc4 25.Rfd1 Ba6 26.fxe6 Qxe6 27.Rxd8 
Bxe2 28.R1d2 Qf5 29.h3 Kh7 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.20"]
[Round "12"]
[White "Andersson, Ulf"]
[Black "Tatai, Stefano"]
[Result "1/2-1/2"]
[WhiteElo "2565"]
[BlackElo "2455"]
[ECO "E18"]
[EventDate "1975.04.06"]
[PlyCount "48"]

1.Nf3 Nf6 2.c4 b6 3.g3 Bb7 4.Bg2 e6 5.O-O Be7 6.Nc3 O-O 7.d4 Ne4 8.Nxe4 
Bxe4 9.Ne1 Bxg2 10.Nxg2 Nc6 11.d5 Na5 12.b3 Bf6 13.Rb1 Re8 14.Re1 Bc3 15.
Bd2 Bxd2 16.Qxd2 e5 17.e4 Nb7 18.Ne3 a5 19.f3 d6 20.Kg2 Nc5 21.h4 h5 22.
Rh1 Qf6 23.Nd1 Qg6 24.Qg5 Kh7 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.20"]
[Round "12"]
[White "Debarnot, Roberto Luis"]
[Black "Hort, Vlastimil"]
[Result "0-1"]
[WhiteElo "2380"]
[BlackElo "2600"]
[ECO "D76"]
[EventDate "1975.04.06"]
[PlyCount "121"]

1.Nf3 Nf6 2.g3 d5 3.Bg2 g6 4.c4 Bg7 5.O-O O-O 6.cxd5 Nxd5 7.d4 Nb6 8.Nc3 
Nc6 9.e3 e5 10.dxe5 Nxe5 11.Nxe5 Qxd1 12.Rxd1 Bxe5 13.h3 c6 14.Bd2 Nc4 15.
Rab1 a5 16.Na4 Bf5 17.e4 Nxd2 18.Rxd2 Be6 19.b3 Rad8 20.Rbd1 Bc7 21.Nc5 
Rxd2 22.Rxd2 Bc8 23.h4 Rd8 24.Rxd8+ Bxd8 25.Kf1 b6 26.Nd3 Ba6 27.Ke2 c5 
28.Kd2 c4 29.Nb2 cxb3 30.axb3 Bf6 31.Nd1 Bd4 32.Bh3 Kf8 33.Bd7 Ke7 34.Bc6 
Bc8 35.Kd3 Bc5 36.f3 Be6 37.Bd5 Bxd5 38.exd5 Kd6 39.Kc4 f5 40.Nc3 Bf2 41.
Ne2 Ke5 42.h5 gxh5 43.Nf4 Bxg3 44.Nxh5 Be1 45.f4+ Kd6 46.Nf6 Bd2 47.Nxh7 
Bxf4 48.Nf8 Be5 49.Nh7 Bf4 50.Nf8 Bh2 51.Nh7 Bg1 52.Ng5 Be3 53.Nf7+ Ke7 
54.Ne5 f4 55.Kd3 Kd6 56.Ke4 b5 57.Nc6 Bb6 58.Ne5 Bc7 59.Kd4 Ke7 60.Nf3 Bd6
61.Nd2 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.20"]
[Round "12"]
[White "Ljubojevic, Ljubomir"]
[Black "Mecking, Henrique"]
[Result "1-0"]
[WhiteElo "2615"]
[BlackElo "2610"]
[ECO "B96"]
[EventDate "1975.04.06"]
[PlyCount "65"]

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.O-O-O Ra7 
15.Nf3 Qf4+ 16.Nd2 Qe5 17.Nf3 Qf4+ 18.Nd2 Qd6 19.Qf3 Qc6 20.Nde4 b4 21.Qf2
Rd7 22.Rxd7 Nxd7 23.Qxf7+ Kd8 24.Ng5 Kc7 25.Bf3 Qd6 26.Nxe6+ Kb6 27.Rd1 
bxc3 28.Rxd6+ Bxd6 29.Qxg7 Be5 30.Qe7 cxb2+ 31.Kb1 a5 32.Nc5 Nxc5 33.Qxe5 
1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.20"]
[Round "12"]
[White "Olafsson, Fridrik"]
[Black "Cardoso, Rodolfo Tan"]
[Result "1-0"]
[WhiteElo "2535"]
[BlackElo "2410"]
[ECO "A40"]
[EventDate "1975.04.06"]
[PlyCount "61"]

1.d4 g6 2.c4 c6 3.Nc3 Bg7 4.e4 d5 5.e5 Be6 6.cxd5 Bxd5 7.Nge2 Nh6 8.Nxd5 
Qxd5 9.Nc3 Qd7 10.Bc4 Nf5 11.Be3 b5 12.Bb3 Na6 13.O-O O-O 14.a4 b4 15.Ne4 
Rad8 16.Ng5 Nc7 17.Qf3 Nd5 18.Qe4 e6 19.Rad1 Bh6 20.Bc1 Nde7 21.g4 Nxd4 
22.Nf3 Qc7 23.Rxd4 Bxc1 24.Rxc1 a5 25.Qf4 Nd5 26.Bxd5 exd5 27.Qd2 Qb6 28.
Rf4 Kg7 29.Rf6 Rc8 30.Nd4 Rfe8 31.Qf4 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.20"]
[Round "12"]
[White "Pomar Salamanca, Arturo"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[WhiteElo "2450"]
[BlackElo "2645"]
[ECO "D32"]
[EventDate "1975.04.06"]
[PlyCount "121"]

1.d4 Nf6 2.c4 e6 3.Nf3 c5 4.Nc3 cxd4 5.Nxd4 Nc6 6.e3 d5 7.cxd5 exd5 8.Be2 
Bd6 9.O-O O-O 10.Bd2 Qe7 11.Re1 Be5 12.Bf3 Rd8 13.Rc1 Be6 14.Qa4 Bd7 15.
Qb3 Qd6 16.h3 Nxd4 17.exd4 Bxd4 18.Nxd5 Be6 19.Nxf6+ gxf6 20.Qxb7 Rab8 21.
Qe4 Bxf2+ 22.Kxf2 Qxd2+ 23.Kg1 Qxb2 24.Kh1 Qd4 25.Rc7 a5 26.Qxd4 Rxd4 27.
Rc3 Kg7 28.Ra3 Rb5 29.Re4 Rd2 30.Rea4 Bxh3 31.Kh2 Be6 32.Rxa5 Rbb2 33.Be4 
f5 34.Rg3+ Kf6 35.Bf3 Rxa2 36.Rxa2 Rxa2 37.Rh3 Kg7 38.Rg3+ Kh8 39.Rh3 Ra4 
40.Bc6 Rc4 41.Bf3 Rb4 42.Kg1 f4 43.Rh5 Kg7 44.Re5 Kf6 45.Re4 Rxe4 46.Bxe4 
Bf5 47.Bd5 Be6 48.Be4 h5 49.Kf2 Ke5 50.Bf3 Bg4 51.Bc6 h4 52.Be8 Be6 53.Bc6
Bb3 54.Be8 Bd5 55.Bd7 f5 56.Bc8 Bc6 57.Ba6 f3 58.gxf3 Kf4 59.Bc8 h3 60.
Bxf5 Bxf3 61.Bxh3 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.20"]
[Round "12"]
[White "Rodriguez Vargas, Orestes"]
[Black "Bellon Lopez, Juan Manuel"]
[Result "0-1"]
[WhiteElo "2435"]
[BlackElo "2415"]
[ECO "A40"]
[EventDate "1975.04.06"]
[PlyCount "77"]

1.e4 c5 2.Nf3 g6 3.d4 Bg7 4.c4 Qa5+ 5.Bd2 Qb6 6.Bc3 Nf6 7.d5 O-O 8.Nbd2 d6
9.h3 e5 10.g4 Qd8 11.Be2 Ne8 12.Qc2 Bh6 13.O-O-O Bf4 14.Rdg1 a6 15.Ne1 b5 
16.b3 b4 17.Bb2 Qg5 18.h4 Bxd2+ 19.Kd1 Qe7 20.Qxd2 f6 21.Nd3 Rf7 22.f4 
exf4 23.g5 Qxe4 24.Nxf4 fxg5 25.Ne6 Bxe6 26.dxe6 Rf2 27.Rf1 Nc6 28.Rxf2 
Qxh1+ 29.Rf1 Qg2 30.hxg5 Ne7 31.Bf6 Nf5 32.e7 Ra7 33.Rf3 Qg1+ 34.Kc2 Nxe7 
35.Bd3 Nxf6 36.gxf6 Nc6 37.Rf2 Qa1 38.Qe3 Qc3+ 39.Kd1 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.20"]
[Round "12"]
[White "Visier Segovia, Fernando"]
[Black "Tal, Mikhail"]
[Result "0-1"]
[WhiteElo "2375"]
[BlackElo "2645"]
[ECO "A42"]
[EventDate "1975.04.06"]
[PlyCount "90"]

1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 Nd7 5.Be3 c5 6.Nge2 a6 7.Nc1 Ngf6 8.Be2 O-O
9.Nb3 b6 10.d5 b5 11.cxb5 axb5 12.Bxb5 Nb6 13.Be2 Na4 14.Qc2 Nxc3 15.bxc3 
Nxe4 16.Qxe4 Bxc3+ 17.Bd2 Bxa1 18.Nxa1 Rxa2 19.Qb1 Rxd2 20.Kxd2 Qa5+ 21.
Ke3 c4 22.Bf3 Qa7+ 23.Ke2 Ba6 24.Rc1 c3+ 25.Ke1 Qd4 26.Qc2 Qe5+ 27.Kd1 
Qd4+ 28.Ke1 Rb8 29.Qd1 Qe5+ 30.Be2 Bxe2 31.Qxe2 Qxh2 32.Nc2 Qxg2 33.Ne3 
Qh1+ 34.Qf1 Qf3 35.Qe2 Qh1+ 36.Qf1 Qe4 37.Qc4 Qxc4 38.Nxc4 Rc8 39.Ne3 e5 
40.dxe6 fxe6 41.Ke2 Kf7 42.Nd1 c2 43.Ne3 g5 44.Rxc2 Rxc2+ 45.Nxc2 Kf6 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.22"]
[Round "13"]
[White "Cardoso, Rodolfo Tan"]
[Black "Visier Segovia, Fernando"]
[Result "1/2-1/2"]
[WhiteElo "2410"]
[BlackElo "2375"]
[ECO "B34"]
[EventDate "1975.04.06"]
[PlyCount "86"]

1.e4 c5 2.Ne2 Nc6 3.Nbc3 g6 4.d4 cxd4 5.Nxd4 Bg7 6.Be3 Nf6 7.Be2 O-O 8.O-O
d5 9.exd5 Nb4 10.d6 Qxd6 11.Ndb5 Qb8 12.Bc5 Nc6 13.Bf3 a6 14.Na3 Be6 15.
Qe2 Nd7 16.Na4 Qf4 17.Bxc6 bxc6 18.c4 Nxc5 19.Nxc5 Bg4 20.Qxe7 Rfe8 21.Qb7
Be5 22.g3 Qf3 23.Nc2 Bd6 24.Nd4 Qf6 25.Ncb3 c5 26.Nc2 Bf3 27.Qd7 Rad8 28.
Qh3 Re5 29.Rfe1 Rh5 30.Qf1 Ba8 31.Ne3 Qxb2 32.Qe2 Qxe2 33.Rxe2 Be5 34.Rd1 
Bd4 35.Nxd4 Rxd4 36.Red2 Be4 37.Rxd4 cxd4 38.Rxd4 Bb1 39.Nd5 Re5 40.Nc3 
Bf5 41.Kg2 h5 42.a4 Kf8 43.h3 Rc5 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.22"]
[Round "13"]
[White "Fernandez Fernandez, Angel"]
[Black "Olafsson, Fridrik"]
[Result "0-1"]
[WhiteElo "2300"]
[BlackElo "2535"]
[ECO "B92"]
[EventDate "1975.04.06"]
[PlyCount "72"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5 7.Nb3 Be7 8.g4 h6 
9.h4 Be6 10.Bf3 Nbd7 11.Be3 Nb6 12.Qe2 Nc4 13.O-O-O Nxe3 14.fxe3 Nd7 15.
Qf2 b5 16.Nd5 a5 17.Be2 Rb8 18.Kb1 a4 19.Nd2 a3 20.bxa3 Nc5 21.Qe1 Bxd5 
22.exd5 Qc7 23.Qf2 Na4 24.Ne4 b4 25.Rdf1 O-O 26.Bd3 bxa3+ 27.Kc1 Nb2 28.
Qd2 Qb6 29.Qc3 Qxe3+ 30.Nd2 e4 31.Re1 Nxd3+ 32.cxd3 Qb6 33.Rxe4 Bf6 34.Qc2
Qa5 35.Nb3 Qxd5 36.Rc4 Qxh1+ 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.22"]
[Round "13"]
[White "Hort, Vlastimil"]
[Black "Ljubojevic, Ljubomir"]
[Result "1/2-1/2"]
[WhiteElo "2600"]
[BlackElo "2615"]
[ECO "A30"]
[EventDate "1975.04.06"]
[PlyCount "31"]

1.Nf3 Nf6 2.c4 c5 3.Nc3 g6 4.g3 b6 5.Bg2 Bb7 6.b3 Bg7 7.Bb2 O-O 8.O-O Nc6 
9.d4 Nxd4 10.Nxd4 Bxg2 11.Kxg2 cxd4 12.Qxd4 Rc8 13.Nd5 Ne8 14.Qd2 Bxb2 15.
Qxb2 Nc7 16.Rfd1 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.22"]
[Round "13"]
[White "Mecking, Henrique"]
[Black "Rodriguez Vargas, Orestes"]
[Result "1-0"]
[WhiteElo "2610"]
[BlackElo "2435"]
[ECO "C63"]
[EventDate "1975.04.06"]
[PlyCount "49"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 Nd4 5.Ba4 Nf6 6.exf5 Bc5 7.Nxe5 O-O 8.O-O
d5 9.Ne2 Qd6 10.Nxd4 Bxd4 11.Nf3 Ng4 12.c3 Rxf5 13.cxd4 Rxf3 14.g3 Nxh2 
15.Kxh2 Qh6+ 16.Kg1 Bg4 17.Qe1 Qh3 18.Bd1 Raf8 19.d3 h5 20.Bg5 Rxf2 21.
Qxf2 Rxf2 22.Rxf2 Qxg3+ 23.Rg2 Qe1+ 24.Kh2 Bxd1 25.Rd2 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.22"]
[Round "13"]
[White "Petrosian, Tigran"]
[Black "Debarnot, Roberto Luis"]
[Result "1-0"]
[WhiteElo "2645"]
[BlackElo "2380"]
[ECO "E53"]
[EventDate "1975.04.06"]
[PlyCount "85"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 d5 6.Nf3 O-O 7.O-O Nbd7 8.cxd5 
exd5 9.a3 Bxc3 10.bxc3 c4 11.Bc2 Re8 12.Nd2 Qa5 13.Bb2 Nb6 14.Re1 Bd7 15.
a4 Ne4 16.Nf1 f5 17.f3 Nf6 18.h3 h5 19.Ng3 g6 20.Kf2 h4 21.Nf1 Re6 22.Kg1 
Kf7 23.Re2 Rh8 24.Bc1 Nc8 25.Qe1 Bc6 26.Ba3 Qc7 27.Qf2 a5 28.Rae1 Kg7 29.
Nd2 Nh5 30.Ra1 Qg3 31.Nf1 Qxf2+ 32.Kxf2 Rhe8 33.Ree1 Ng3 34.Nd2 f4 35.e4 
dxe4 36.fxe4 Bxe4 37.Nxe4 Nxe4+ 38.Rxe4 Rxe4 39.Bxe4 Rxe4 40.Rb1 b6 41.d5 
Re3 42.Rd1 Rxc3 43.Bb2 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.22"]
[Round "13"]
[White "Tal, Mikhail"]
[Black "Andersson, Ulf"]
[Result "1/2-1/2"]
[WhiteElo "2645"]
[BlackElo "2565"]
[ECO "B85"]
[EventDate "1975.04.06"]
[PlyCount "47"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be2 a6 7.O-O Be7 8.f4 Qc7
9.Be3 O-O 10.Qe1 Nc6 11.Qg3 Nxd4 12.Bxd4 b5 13.a3 Bb7 14.Rae1 Bc6 15.Kh1 
Rab8 16.e5 Ne8 17.Bd3 g6 18.Qh3 Ng7 19.Qh6 f6 20.Re3 Rf7 21.f5 Nxf5 22.
Bxf5 exf5 23.e6 Rg7 24.Ne2 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.22"]
[Round "13"]
[White "Tatai, Stefano"]
[Black "Pomar Salamanca, Arturo"]
[Result "0-1"]
[WhiteElo "2455"]
[BlackElo "2450"]
[ECO "E16"]
[EventDate "1975.04.06"]
[PlyCount "88"]

1.d4 Nf6 2.Nf3 e6 3.c4 Bb4+ 4.Bd2 Qe7 5.g3 b6 6.Bg2 Bb7 7.O-O Bxd2 8.Qxd2 
d6 9.Nc3 Ne4 10.Nxe4 Bxe4 11.Qe3 Bb7 12.d5 Nd7 13.Nd2 O-O 14.Nb1 Rae8 15.
Nc3 Ne5 16.b3 f5 17.Qd2 Ng6 18.e3 e5 19.f4 h5 20.Bf3 h4 21.Bh5 Rf6 22.g4 
Kh7 23.g5 Rff8 24.Rf3 c6 25.Raf1 cxd5 26.Nxd5 Bxd5 27.Qxd5 exf4 28.exf4 
Qe6 29.Rd3 Qxd5 30.Rxd5 Re6 31.Rd4 Rfe8 32.Kf2 R8e7 33.Rfd1 Nf8 34.Rxd6 
Re4 35.R1d4 Rxd4 36.Rxd4 Ne6 37.Rd6 Nxf4 38.g6+ Kh6 39.Bd1 Kg5 40.b4 Rc7 
41.Bb3 Nxg6 42.c5 bxc5 43.bxc5 Ne5 44.Rd5 Rxc5 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.23"]
[Round "14"]
[White "Andersson, Ulf"]
[Black "Pomar Salamanca, Arturo"]
[Result "1-0"]
[WhiteElo "2565"]
[BlackElo "2450"]
[ECO "A30"]
[EventDate "1975.04.06"]
[PlyCount "133"]

1.Nf3 Nf6 2.c4 e6 3.b3 Be7 4.Bb2 O-O 5.e3 b6 6.Be2 Bb7 7.O-O c5 8.d3 d6 9.
a3 Nc6 10.Nbd2 Rc8 11.b4 a5 12.bxc5 bxc5 13.Rb1 Rb8 14.Qc2 Qc7 15.Rfc1 
Rfc8 16.Bc3 Ba6 17.h3 h6 18.Qa2 Rxb1 19.Rxb1 Rb8 20.Bd1 Rxb1 21.Qxb1 d5 
22.Ba4 d4 23.exd4 cxd4 24.Nxd4 Nxd4 25.Bxd4 Qd6 26.Bb2 Nh5 27.Ne4 Qb6 28.
Qc2 f5 29.Nd2 Nf4 30.Be5 g5 31.Bxf4 gxf4 32.Qb3 Qd4 33.Nf3 Qa1+ 34.Kh2 
Qxa3 35.Qb6 Bc8 36.Qxa5 Qxd3 37.Qa8 Qd8 38.Ne5 Qc7 39.Bd7 Qxe5 40.Qxc8+ 
Kg7 41.Bxe6 f3+ 42.g3 Qe2 43.Qg8+ Kf6 44.Qf7+ Ke5 45.Qxf5+ Kd4 46.Qd5+ Kc3
47.Qa5+ Kd3 48.Qb6 Bf6 49.Bf5+ Kd2 50.h4 h5 51.Bg6 Be5 52.Bxh5 Ke1 53.Qb1+
Kd2 54.Qa2+ Ke1 55.Qxe2+ Kxe2 56.Bxf3+ Kxf3 57.Kh3 Bd4 58.h5 Bxf2 59.h6 
Bd4 60.Kh4 Ke4 61.Kg5 Kd3 62.Kg6 Kxc4 63.g4 Kd5 64.Kf7 Ke5 65.g5 Kf5 66.g6
Kg5 67.g7 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.23"]
[Round "14"]
[White "Debarnot, Roberto Luis"]
[Black "Tatai, Stefano"]
[Result "0-1"]
[WhiteElo "2380"]
[BlackElo "2455"]
[ECO "A32"]
[EventDate "1975.04.06"]
[PlyCount "78"]

1.d4 Nf6 2.c4 c5 3.Nf3 e6 4.Nc3 cxd4 5.Nxd4 Bb4 6.Nc2 Bxc3+ 7.bxc3 Qa5 8.
Qd3 Na6 9.f3 Nc5 10.Qd2 O-O 11.e3 b6 12.Be2 Ba6 13.Ba3 d5 14.Bb4 Qa4 15.
cxd5 Nxd5 16.Bxc5 bxc5 17.Bxa6 Qxa6 18.e4 Nb6 19.Ne3 Rfd8 20.Qe2 Qa3 21.
O-O Qxc3 22.Rac1 Qa5 23.Rc2 Rac8 24.Rfc1 h6 25.h4 Rd4 26.Nc4 Nxc4 27.Rxc4 
Rd2 28.Qe1 Qxa2 29.Qg3 Rd1+ 30.Rxd1 Qxc4 31.Rd7 Qa4 32.Qd6 Qa1+ 33.Kh2 Qf6
34.Kh3 c4 35.Rxa7 c3 36.Rc7 Rxc7 37.Qxc7 g5 38.hxg5 hxg5 39.Qc5 Qh6+ 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.23"]
[Round "14"]
[White "Ljubojevic, Ljubomir"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[WhiteElo "2615"]
[BlackElo "2645"]
[ECO "C07"]
[EventDate "1975.04.06"]
[PlyCount "34"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.Ngf3 cxd4 5.exd5 Qxd5 6.Bc4 Qd6 7.O-O Nf6 8.Nb3
Nc6 9.Nbxd4 Nxd4 10.Qxd4 Qxd4 11.Nxd4 Bd7 12.Bf4 Rc8 13.Bb3 Bc5 14.Rad1 
O-O 15.c3 Rfd8 16.h3 Kf8 17.Rfe1 Be7 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.23"]
[Round "14"]
[White "Olafsson, Fridrik"]
[Black "Bellon Lopez, Juan Manuel"]
[Result "1-0"]
[WhiteElo "2535"]
[BlackElo "2415"]
[ECO "B27"]
[EventDate "1975.04.06"]
[PlyCount "77"]

1.e4 c5 2.Nf3 g6 3.d4 Bg7 4.c3 cxd4 5.cxd4 d5 6.e5 Bg4 7.Nbd2 Nc6 8.Bb5 
Qb6 9.Qa4 Rc8 10.O-O Bd7 11.Bxc6 Rxc6 12.Qd1 Bf5 13.Nb3 Bc2 14.Qe2 Bxb3 
15.axb3 a6 16.Qd3 Bh6 17.Ng5 f6 18.Nf3 Bxc1 19.Raxc1 f5 20.Qe3 e6 21.Rxc6 
Qxc6 22.Rc1 Qd7 23.h4 Ne7 24.b4 O-O 25.Rc5 Nc6 26.h5 f4 27.Qb3 g5 28.Nxg5 
Nxd4 29.Qd1 Qg7 30.Qxd4 Qxg5 31.f3 Qxh5 32.Rc7 Qf5 33.Qc5 Qb1+ 34.Kh2 Rf5 
35.Rc8+ Kg7 36.Qe7+ Kh6 37.Qxe6+ Kh5 38.Rh8 Rg5 39.Qh3+ 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.23"]
[Round "14"]
[White "Rodriguez Vargas, Orestes"]
[Black "Hort, Vlastimil"]
[Result "0-1"]
[WhiteElo "2435"]
[BlackElo "2600"]
[ECO "A45"]
[EventDate "1975.04.06"]
[PlyCount "52"]

1.d4 Nf6 2.Bg5 c5 3.d5 Ne4 4.Bh4 Qb6 5.Qc1 g5 6.Bg3 Bg7 7.c3 Qh6 8.Bxb8 
Rxb8 9.Nd2 Nxd2 10.Qxd2 b5 11.Nf3 b4 12.Nxg5 bxc3 13.bxc3 Qa6 14.Rc1 Qa3 
15.e4 Rb1 16.Kd1 Bxc3 17.Qc2 Rxc1+ 18.Qxc1 Qb4 19.Bd3 Rg8 20.Nf3 Rxg2 21.
Rg1 Qa4+ 22.Qc2 Qxc2+ 23.Kxc2 Rxg1 24.Nxg1 Bd4 25.Nh3 d6 26.Bf1 h6 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.23"]
[Round "14"]
[White "Tal, Mikhail"]
[Black "Cardoso, Rodolfo Tan"]
[Result "1-0"]
[WhiteElo "2645"]
[BlackElo "2410"]
[ECO "E16"]
[EventDate "1975.04.06"]
[PlyCount "175"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ 6.Bd2 Qe7 7.O-O Bxd2 8.Qxd2 
O-O 9.Nc3 Ne4 10.Nxe4 Bxe4 11.Qf4 d5 12.cxd5 exd5 13.Rac1 c5 14.dxc5 bxc5 
15.Qe3 Qb7 16.b3 Na6 17.Qf4 Rad8 18.Bh3 Qb5 19.Nd2 Bg6 20.Bg4 Nb4 21.Qc7 
Na6 22.Qf4 Nb4 23.Qe3 d4 24.Qe7 Nxa2 25.Qxc5 Qxc5 26.Rxc5 Nc3 27.Ra1 Rfe8 
28.Kf1 Re7 29.Ra6 h5 30.Bf3 f6 31.Rac6 Rdd7 32.Rc8+ Kh7 33.Rf8 Rc7 34.Rxc7
Rxc7 35.Rd8 Nb5 36.Rd5 Rc1+ 37.Kg2 Rc2 38.Ne4 a6 39.b4 Rc4 40.Rd7 Kh6 41.
Rd8 Kh7 42.Nc5 Rxb4 43.Nxa6 Rc4 44.Nb8 Nc3 45.Nd7 Bf7 46.h4 Rb4 47.Nc5 g6 
48.Rd6 Kg7 49.Nd7 f5 50.Ne5 Be8 51.Rd8 Bb5 52.Rd6 Be8 53.Nd3 Ra4 54.Nc5 
Rb4 55.Ne6+ Kh7 56.Rd8 Bb5 57.Nxd4 Bc4 58.Rd7+ Kh8 59.Rc7 Ne4 60.Nc6 Rb6 
61.Ne5 Bb3 62.Nd7 Rd6 63.Bxe4 fxe4 64.Nc5 Bc2 65.Re7 Rd4 66.Ne6 Rb4 67.Nf4
Rb6 68.Nd5 Rd6 69.Ne3 Ba4 70.Nc4 Rd7 71.Ne5 Rxe7 72.Nxg6+ Kg7 73.Nxe7 Kf6 
74.Nd5+ Ke5 75.Nf4 Be8 76.Kf1 Bf7 77.Ke1 Kd4 78.Kd2 Be8 79.Ng2 Bd7 80.Ne3 
Bc8 81.Nc2+ Ke5 82.Ke3 Bg4 83.Nd4 Bd7 84.Nb3 Bg4 85.Nd2 Bf5 86.Nc4+ Kd5 
87.Kf4 Be6 88.Nd2 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.23"]
[Round "14"]
[White "Visier Segovia, Fernando"]
[Black "Fernandez Fernandez, Angel"]
[Result "1/2-1/2"]
[WhiteElo "2375"]
[BlackElo "2300"]
[ECO "D36"]
[EventDate "1975.04.06"]
[PlyCount "35"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Nbd7 5.cxd5 exd5 6.Bg5 Be7 7.e3 O-O 8.Bd3 
c6 9.Qc2 h6 10.Bh4 Re8 11.h3 Nf8 12.O-O-O Qa5 13.Kb1 Bb4 14.Rc1 Bxc3 15.
Qxc3 Qxc3 16.Rxc3 Ne4 17.Bxe4 Rxe4 18.g4 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.25"]
[Round "15"]
[White "Bellon Lopez, Juan Manuel"]
[Black "Visier Segovia, Fernando"]
[Result "1-0"]
[WhiteElo "2415"]
[BlackElo "2375"]
[ECO "B34"]
[EventDate "1975.04.06"]
[PlyCount "89"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Bc4 Bg7 6.Nxc6 bxc6 7.Qf3 Nf6 8.
Nc3 O-O 9.e5 Ne8 10.Bf4 Qa5 11.O-O Bxe5 12.Nd5 cxd5 13.Bxe5 Bb7 14.Bb3 Bc6
15.Qe3 Nd6 16.Bc3 Qd8 17.Bxd5 Bxd5 18.Qe5 f6 19.Qxd5+ Kg7 20.Rad1 Rb8 21.
a4 Qc8 22.Rfe1 Rf7 23.Qd4 Nf5 24.Qxd7 Qxd7 25.Rxd7 e5 26.Red1 Nd4 27.Rxf7+
Kxf7 28.Bxd4 exd4 29.b3 Rc8 30.Rxd4 Rxc2 31.g4 Ke6 32.Rb4 Rb2 33.Rb7 Ke5 
34.Kg2 a5 35.Kg3 f5 36.Rb5+ Kf6 37.gxf5 gxf5 38.f3 Kg5 39.h4+ Kg6 40.Rb6+ 
Kh5 41.Rf6 Rxb3 42.Rxf5+ Kg6 43.Rxa5 Ra3 44.Kg4 h6 45.Ra6+ 1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.25"]
[Round "15"]
[White "Cardoso, Rodolfo Tan"]
[Black "Andersson, Ulf"]
[Result "0-1"]
[WhiteElo "2410"]
[BlackElo "2565"]
[ECO "B80"]
[EventDate "1975.04.06"]
[PlyCount "82"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 a6 7.Qf3 Qc7 8.O-O-O 
Nbd7 9.Be2 b5 10.e5 Bb7 11.exd6 Bxd6 12.Qh3 Be7 13.Bf3 Rc8 14.Bxb7 Qxb7 
15.Kb1 O-O 16.f4 Rfe8 17.Rdf1 Bf8 18.g4 Nb6 19.Bc1 b4 20.Nce2 a5 21.Qf3 
Qxf3 22.Rxf3 Nxg4 23.Rg1 Nh6 24.Rg5 a4 25.Rh3 g6 26.Rb5 Nd5 27.Ng3 Rc4 28.
Nf3 Rec8 29.Ne1 a3 30.f5 Nxf5 31.Nxf5 gxf5 32.Rg3+ Rg4 33.Nd3 Bd6 34.Rf3 
axb2 35.Kxb2 Nc3 36.Rb7 Nd1+ 37.Kb1 Rg1 38.Nxb4 Be5 39.Nd3 Bg7 40.c4 Nc3+ 
41.Kc2 Ne4 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.25"]
[Round "15"]
[White "Fernandez Fernandez, Angel"]
[Black "Tal, Mikhail"]
[Result "0-1"]
[WhiteElo "2300"]
[BlackElo "2645"]
[ECO "B46"]
[EventDate "1975.04.06"]
[PlyCount "84"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6 6.g3 Nge7 7.Bg2 Nxd4 8.Qxd4
Nc6 9.Qd1 Be7 10.O-O d6 11.b3 O-O 12.Bb2 Bd7 13.Qg4 Bf6 14.f4 Qa5 15.Na4 
Bxb2 16.Nxb2 Qc3 17.Na4 Qe3+ 18.Kh1 b5 19.Rae1 Qa7 20.Nb2 Qd4 21.Nd3 Rac8 
22.Rd1 Rc7 23.Qh5 Ne7 24.c4 bxc4 25.Qa5 Qa7 26.Nb2 cxb3 27.axb3 Bb5 28.Rf2
Qxf2 29.Qxc7 Qxb2 30.Qxe7 Be2 31.Rg1 Qxb3 32.Qxd6 Rc8 33.f5 exf5 34.exf5 
Bf3 35.Qf4 Bxg2+ 36.Kxg2 Rc2+ 37.Kh3 Qb2 38.Rh1 Qb7 39.Qa4 Qg2+ 40.Kh4 Re2
41.Qd1 Re4+ 42.g4 Qf2+ 0-1

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.25"]
[Round "15"]
[White "Mecking, Henrique"]
[Black "Olafsson, Fridrik"]
[Result "1/2-1/2"]
[WhiteElo "2610"]
[BlackElo "2535"]
[ECO "C92"]
[EventDate "1975.04.06"]
[PlyCount "29"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 
9.h3 Be6 10.d4 Bxb3 11.Qxb3 d5 12.dxe5 Nxe4 13.Nbd2 Nc5 14.Qc2 Qd7 15.Nf1 
1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.25"]
[Round "15"]
[White "Petrosian, Tigran"]
[Black "Rodriguez Vargas, Orestes"]
[Result "1-0"]
[WhiteElo "2645"]
[BlackElo "2435"]
[ECO "A67"]
[EventDate "1975.04.06"]
[PlyCount "67"]

1.d4 Nf6 2.c4 e6 3.Nc3 c5 4.d5 exd5 5.cxd5 g6 6.e4 d6 7.f4 Bg7 8.Bb5+ Nfd7
9.Bd3 O-O 10.Nf3 Na6 11.O-O Nc7 12.a4 Na6 13.Re1 Re8 14.h3 Nb4 15.Bc4 a6 
16.Be3 Rb8 17.Bf2 b5 18.axb5 axb5 19.Nxb5 Nb6 20.Bf1 Bxb2 21.Bh4 Qd7 22.
Ra7 Rb7 23.Ra5 Bg7 24.e5 dxe5 25.Nxe5 Rxe5 26.fxe5 N6xd5 27.Nd6 Rc7 28.Bb5
Qe6 29.Ne8 Bxe5 30.Nxc7 Nxc7 31.Bg3 Bxg3 32.Rxe6 Nxe6 33.Qf3 Bc7 34.Be8 
1-0

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.25"]
[Round "15"]
[White "Pomar Salamanca, Arturo"]
[Black "Debarnot, Roberto Luis"]
[Result "1/2-1/2"]
[WhiteElo "2450"]
[BlackElo "2380"]
[ECO "A36"]
[EventDate "1975.04.06"]
[PlyCount "37"]

1.c4 c5 2.Nc3 g6 3.g3 Bg7 4.Bg2 Nc6 5.e3 h5 6.Nf3 Nh6 7.e4 d6 8.d3 Bd7 9.
h3 Qc8 10.Bg5 Rb8 11.Qd2 a6 12.a4 b6 13.Rc1 Nd4 14.Qd1 Ng8 15.Nxd4 Bxd4 
16.b3 f6 17.Bd2 h4 18.g4 e5 19.f4 1/2-1/2

[Event "4th Las Palmas it"]
[Site "Las Palmas ESP"]
[Date "1975.04.25"]
[Round "15"]
[White "Tatai, Stefano"]
[Black "Ljubojevic, Ljubomir"]
[Result "1/2-1/2"]
[WhiteElo "2455"]
[BlackElo "2615"]
[ECO "C09"]
[EventDate "1975.04.06"]
[PlyCount "20"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5 5.Bb5+ Nc6 6.Ngf3 Bd6 7.O-O Ne7 8.c4 
O-O 9.dxc5 Bxc5 10.Nb3 Bb6 1/2-1/2

