[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "1"]
[White "Alvarez del Monte, Jose Luis"]
[Black "Rubinetti, Jorge Alberto"]
[Result "1/2-1/2"]
[ECO "B43"]
[EventDate "1969.03.22"]
[PlyCount "113"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 b5 6.a3 Bb7 7.Be2 Qc7 8.O-O Nf6
9.Bf3 d6 10.Bg5 Nbd7 11.Bxf6 Nxf6 12.Qe2 Be7 13.Rad1 O-O 14.e5 dxe5 15.
Bxb7 exd4 16.Bxa8 dxc3 17.Bf3 cxb2 18.c4 bxc4 19.Qxb2 c3 20.Qa1 Bd6 21.
Rxd6 Qxd6 22.Qxc3 Rd8 23.Qa5 g6 24.h3 Rc8 25.Rd1 Rc5 26.Rxd6 Rxa5 27.Be2 
Rxa3 28.Rxa6 Rxa6 29.Bxa6 h5 30.g3 Kf8 31.Kf1 Ke7 32.h4 Kd6 33.Kg2 Ke5 34.
Kf3 Kd4 35.Bb5 Ne4 36.Ba6 Nd2+ 37.Ke2 Ne4 38.Kf3 Nd6 39.Ke2 e5 40.Kf3 Ne4 
41.Bb5 Nd6 42.Bc6 Nc4 43.Bb7 Nb2 44.g4 Nd3 45.gxh5 gxh5 46.Bc6 f5 47.Be8 
e4+ 48.Kg3 f4+ 49.Kg2 Kc3 50.Bxh5 Kd2 51.Kf1 Ne5 52.Be2 f3 53.Bb5 Ng4 54.
h5 Nh2+ 55.Kg1 Ng4 56.Kf1 Nh6 57.Bd7 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "1"]
[White "Bronstein, Luis Marcos"]
[Black "Schweber, Samuel"]
[Result "1-0"]
[ECO "B52"]
[EventDate "1969.03.22"]
[PlyCount "63"]

1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7 4.Bxd7+ Qxd7 5.O-O Nc6 6.c3 d5 7.exd5 Qxd5 8.
d4 e6 9.Be3 cxd4 10.cxd4 Nf6 11.Nc3 Qa5 12.Qb3 Bb4 13.a3 Bxc3 14.Qxb7 O-O 
15.bxc3 Rfc8 16.Qb3 Rab8 17.Qc2 e5 18.Rab1 Rxb1 19.Rxb1 e4 20.Nd2 Qxa3 21.
Nxe4 Nxe4 22.Qxe4 Qxc3 23.Rc1 Qb4 24.h3 Ne7 25.Rxc8+ Nxc8 26.Qa8 Qf8 27.d5
Ne7 28.Qb7 Qd8 29.d6 Nf5 30.d7 Nd6 31.Qc6 Qe7 32.Qa8+ 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "1"]
[White "Camara, Helder"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "1-0"]
[ECO "E59"]
[EventDate "1969.03.22"]
[PlyCount "63"]

1.d4 Nf6 2.Nf3 d5 3.c4 e6 4.Nc3 Bb4 5.e3 O-O 6.Bd3 c5 7.O-O dxc4 8.Bxc4 
Nc6 9.a3 Bxc3 10.bxc3 Qc7 11.Be2 Rd8 12.Qc2 e5 13.dxe5 Nxe5 14.e4 Nxf3+ 
15.Bxf3 Bg4 16.Bxg4 Nxg4 17.f4 c4 18.h3 Qb6+ 19.Kh1 Ne3 20.Bxe3 Qxe3 21.
Rf3 Rd2 22.Rxe3 Rxc2 23.Rd1 Ra2 24.Rd7 b5 25.Rb7 a6 26.f5 Rxa3 27.e5 Rf8 
28.Kh2 Ra2 29.f6 Rd2 30.e6 gxf6 31.Rd7 Rd3 32.Rexd3 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "1"]
[White "Garcia, Raimundo"]
[Black "Garcia Toledo, Pedro"]
[Result "1-0"]
[ECO "A34"]
[EventDate "1969.03.22"]
[PlyCount "119"]

1.c4 c5 2.Nc3 Nf6 3.g3 Nc6 4.Bg2 g6 5.a3 d6 6.Rb1 Be6 7.d3 Qd7 8.b4 Bg7 9.
bxc5 dxc5 10.Na4 b6 11.Nf3 Rc8 12.Ng5 O-O 13.Nxe6 Qxe6 14.O-O Rfd8 15.Nc3 
Ne8 16.Bb2 Nd4 17.Re1 Qd7 18.h4 Nd6 19.h5 Nb7 20.hxg6 hxg6 21.Kh2 Na5 22.
Rh1 Nac6 23.Kg1 Ne5 24.Bh3 e6 25.f4 Nec6 26.Ne4 Qe7 27.e3 Nf5 28.Qe2 Rc7 
29.Bf1 f6 30.g4 Nd6 31.Ng3 Kf7 32.Rh7 Rh8 33.Rxg7+ Kxg7 34.g5 Kg8 35.Bxf6 
Qh7 36.Bxh8 Kxh8 37.Qh2 Qxh2+ 38.Kxh2 Kg7 39.Bh3 Nf5 40.Bxf5 exf5 41.Kg2 
Rd7 42.Rb3 Kf7 43.Nh1 Na5 44.Rc3 a6 45.Nf2 Nb7 46.Rb3 Rd6 47.Rb1 Rc6 48.
Kf3 Nd6 49.a4 Ne8 50.Nd1 Nc7 51.Nc3 Rd6 52.Ke2 a5 53.Nd5 Nxd5 54.cxd5 Ke7 
55.e4 Kd7 56.Rh1 b5 57.Rh7+ Ke8 58.axb5 Rb6 59.e5 Rxb5 60.d6 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "1"]
[White "Mendivil Salinas, Ismael"]
[Black "Canobra, Juvenal"]
[Result "1-0"]
[ECO "B34"]
[EventDate "1969.03.22"]
[PlyCount "81"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Be2 O-O 8.O-O 
d5 9.exd5 Nxd5 10.Nxd5 Qxd5 11.Bf3 Qc4 12.Nxc6 bxc6 13.b3 Qa6 14.Rc1 Bf5 
15.a4 Bb2 16.Rb1 Rad8 17.Qe2 Qxe2 18.Bxe2 Bd4 19.Bxd4 Rxd4 20.Rbd1 Rfd8 
21.Rxd4 Rxd4 22.Rd1 e5 23.c3 Rxd1+ 24.Bxd1 Kf8 25.Kf1 Ke7 26.Ke2 c5 27.b4 
Kd6 28.Bb3 f6 29.Ke3 Bd7 30.b5 f5 31.Bg8 h6 32.g3 e4 33.c4 g5 34.a5 Bc8 
35.Bd5 Kc7 36.g4 f4+ 37.Kxe4 Bxg4 38.Ke5 Bd7 39.Kf6 g4 40.Kg6 Kd6 41.b6 
1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "1"]
[White "Najdorf, Miguel"]
[Black "Rossetto, Hector Decio"]
[Result "1/2-1/2"]
[ECO "A25"]
[EventDate "1969.03.22"]
[PlyCount "70"]

1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 d6 6.O-O Nh6 7.d3 Nf5 8.Rb1 O-O 
9.b4 Ncd4 10.Ne1 c6 11.b5 Qc7 12.e3 Ne6 13.Ba3 h5 14.bxc6 bxc6 15.Nb5 Qd7 
16.Nc2 Rb8 17.Nc3 Bb7 18.Na1 Rfd8 19.Qa4 Ba8 20.Nb3 h4 21.Ne4 hxg3 22.hxg3
Qc7 23.Bb4 Qe7 24.c5 d5 25.Nd6 Bh6 26.Rfe1 Ng5 27.Ba5 Rd7 28.Nd2 Rf8 29.
Nxf5 gxf5 30.Qh4 Bg7 31.f4 Ne6 32.Qh5 exf4 33.gxf4 Nxf4 34.Qxf5 Nxg2 35.
Kxg2 Qe6 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "1"]
[White "Quinteros, Miguel Angel"]
[Black "Mecking, Henrique"]
[Result "0-1"]
[ECO "A42"]
[EventDate "1969.03.22"]
[PlyCount "62"]

1.c4 g6 2.Nc3 Bg7 3.d4 d6 4.e4 e5 5.d5 Nd7 6.g3 Ne7 7.Nge2 O-O 8.Bg2 f5 9.
f3 Nf6 10.Be3 c6 11.Qd2 cxd5 12.cxd5 fxe4 13.fxe4 Ng4 14.Bg1 b6 15.h3 Bh6 
16.Qd3 Nf6 17.Be3 Ba6 18.Qd2 Bxe3 19.Qxe3 Nd7 20.Ng1 Qc7 21.Bf3 Qc4 22.Rd1
Qb4 23.Rh2 Rf7 24.Rc2 Nc5 25.Be2 Bxe2 26.Nxe2 Raf8 27.Kd2 Rf3 28.Qg1 Nxe4+
29.Kc1 Nf2 30.Qg2 Nxd1 31.Nxd1 Nxd5 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "1"]
[White "Rocha, Antonio Cavilhas"]
[Black "Rodriguez Vargas, Orestes"]
[Result "1-0"]
[ECO "B87"]
[EventDate "1969.03.22"]
[PlyCount "87"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 e6 7.Bb3 b5 8.O-O Bb7
9.Re1 Nc6 10.a4 b4 11.Nxc6 Bxc6 12.Nd5 Rb8 13.Bg5 Be7 14.Bxf6 gxf6 15.Nf4 
Qa5 16.e5 fxe5 17.Qh5 Rg8 18.Bxe6 Rg7 19.Rad1 Kf8 20.Bb3 Qc5 21.Nd5 Bd8 
22.Re3 Rb7 23.Rg3 f6 24.Qh6 Bxd5 25.Rxd5 Qc6 26.Rf3 Ke8 27.Rfd3 Rg6 28.Qh3
Rbg7 29.g3 f5 30.Qxf5 Rf6 31.Rxd6 Qxd6 32.Qh5+ Ke7 33.Rxd6 Kxd6 34.Kg2 Bb6
35.f3 a5 36.Qh4 Rfg6 37.Qc4 Re7 38.Qa6 Kc7 39.Bd5 Rd6 40.Be4 Rd2+ 41.Kh3 
Re6 42.Qb7+ Kd8 43.Qxh7 Rdd6 44.Kg4 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "1"]
[White "Silva Sanchez, Carlos"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "D77"]
[EventDate "1969.03.22"]
[PlyCount "82"]

1.Nf3 Nf6 2.g3 g6 3.Bg2 Bg7 4.O-O O-O 5.d4 d5 6.c4 dxc4 7.Na3 Nc6 8.Nxc4 
Be6 9.b3 Qc8 10.Nfe5 Nxe5 11.Nxe5 Bh3 12.Ba3 Bxg2 13.Kxg2 Qe6 14.Rc1 c6 
15.e3 Rfd8 16.Qf3 Rd5 17.Rc5 Rxc5 18.Bxc5 Nd5 19.Nd3 a5 20.e4 Nc3 21.Re1 
Nxa2 22.Nf4 Qc8 23.e5 e6 24.h4 h6 25.g4 Qd8 26.Kh3 Nb4 27.Rg1 Nd5 28.Nh5 
gxh5 29.g5 hxg5 30.Rxg5 f6 31.Rg6 Qe8 32.Rg1 Qf7 33.Bd6 fxe5 34.Qe4 Kh8 
35.Rxg7 Kxg7 36.Bxe5+ Nf6 37.f3 Qg6 38.Qe2 Qf5+ 39.Kh2 Kf7 40.Qd1 Rg8 41.
Qe2 Rg6 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "2"]
[White "Canobra, Juvenal"]
[Black "Silva Sanchez, Carlos"]
[Result "0-1"]
[ECO "A01"]
[EventDate "1969.03.22"]
[PlyCount "82"]

1.b3 e5 2.Bb2 Nc6 3.g3 g6 4.Bg2 Bg7 5.c4 Nge7 6.e3 d6 7.Ne2 Bg4 8.h3 Bf5 
9.d3 Qd7 10.Nbc3 Be6 11.Nd5 h5 12.Qd2 f5 13.h4 Nc8 14.b4 O-O 15.b5 Nd8 16.
O-O c6 17.bxc6 bxc6 18.Ndc3 Nb6 19.a4 Rb8 20.a5 Na8 21.Ba3 Nb7 22.Na2 Nc5 
23.Rab1 Na6 24.Nb4 Nxb4 25.Rxb4 c5 26.Rxb8 Rxb8 27.Qc2 Qc7 28.Qd2 Rb3 29.
Qa2 Rxd3 30.Nc1 Rc3 31.Bb2 Rxc4 32.Bxa8 Qc8 33.Ne2 Qxa8 34.Rd1 Kh7 35.Qb1 
d5 36.Qa1 d4 37.exd4 cxd4 38.Re1 Qf3 39.Nxd4 Rxd4 40.Bxd4 Bd5 41.Kf1 exd4 
0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "2"]
[White "Garcia Toledo, Pedro"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "E95"]
[EventDate "1969.03.22"]
[PlyCount "54"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Nf3 e5 7.O-O Nbd7 8.Re1 c6 
9.Bf1 Re8 10.d5 c5 11.a3 Nh5 12.b4 b6 13.Rb1 Nf8 14.g3 f5 15.exf5 gxf5 16.
Ng5 Nf6 17.Bg2 h6 18.Ne6 Nxe6 19.dxe6 e4 20.f3 cxb4 21.axb4 Bxe6 22.fxe4 
Rc8 23.Nb5 fxe4 24.Nxd6 Bg4 25.Qd2 e3 26.Rxe3 Rxe3 27.c5 Re7 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "2"]
[White "Mecking, Henrique"]
[Black "Camara, Helder"]
[Result "1/2-1/2"]
[ECO "B90"]
[EventDate "1969.03.22"]
[PlyCount "129"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 Qc7 7.Bb3 Nbd7 8.g4 
h6 9.f3 Nc5 10.Be3 e6 11.Qe2 Bd7 12.h4 Be7 13.O-O-O O-O-O 14.g5 hxg5 15.
Bxg5 Qa5 16.f4 Ng8 17.Bxe7 Nxe7 18.Nf3 Bc6 19.Ng5 Rhf8 20.Kb1 Nxb3 21.axb3
d5 22.exd5 Nxd5 23.Nxd5 Rxd5 24.Rxd5 Qxd5 25.Rd1 Qc5 26.Qe5 Qxe5 27.fxe5 
Bd7 28.Ne4 Rh8 29.Nd6+ Kc7 30.Nxf7 Rxh4 31.Rg1 Rh7 32.Rg6 Be8 33.Rxe6 Bxf7
34.Re7+ Kc6 35.Rxf7 Rh1+ 36.Ka2 Re1 37.Rf5 Rg1 38.b4 g5 39.c4 g4 40.Rf6+ 
Kc7 41.Rf7+ Kc6 42.Rg7 g3 43.e6 Re1 44.e7 g2 45.Rxg2 Rxe7 46.Kb3 Re1 47.
Rg6+ Kc7 48.c5 Re2 49.Ka3 Rh2 50.Rf6 Rg2 51.Rh6 Rf2 52.b3 Rc2 53.Rd6 Rc3 
54.Kb2 Rh3 55.b5 axb5 56.Ka3 Rh4 57.Rb6 Rg4 58.b4 Rg3+ 59.Kb2 Rh3 60.Kc2 
Rg3 61.Kd2 Rh3 62.Ke2 Rg3 63.Kf2 Rh3 64.Kg2 Ra3 65.Kf2 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "2"]
[White "Panno, Oscar"]
[Black "Rocha, Antonio Cavilhas"]
[Result "1/2-1/2"]
[ECO "E46"]
[EventDate "1969.03.22"]
[PlyCount "38"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2 d5 6.a3 Be7 7.cxd5 exd5 8.Nf4 a5
9.Bd3 c6 10.h3 Bd6 11.Qf3 Re8 12.g4 Qe7 13.Bd2 Nbd7 14.g5 Ne4 15.h4 Nf8 
16.Rc1 Nxc3 17.Bxc3 Bxf4 18.Qxf4 Ne6 19.Qe5 g6 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "2"]
[White "Riego Prieto, Victorio"]
[Black "Alvarez del Monte, Jose Luis"]
[Result "1-0"]
[ECO "C99"]
[EventDate "1969.03.22"]
[PlyCount "73"]

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 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 cxd4 13.cxd4 Nc6 14.Nf1 exd4 15.Bf4 
Qb6 16.Rc1 Nd7 17.Bb1 Nde5 18.Ng3 Nxf3+ 19.Qxf3 Ne5 20.Qd1 Bd7 21.Ne2 Ng6 
22.Bh2 Bf6 23.Qd2 Ne5 24.b3 Rfc8 25.Rcd1 Rd8 26.Kh1 Nc6 27.Bxd6 Be6 28.Qf4
Rxd6 29.Qxd6 Be5 30.Qa3 d3 31.Rxd3 Qxf2 32.Qc1 Rc8 33.Rf3 Qh4 34.Ng1 Nd4 
35.Rc3 Rxc3 36.Qxc3 Ne2 37.Qxe5 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "2"]
[White "Rodriguez Vargas, Orestes"]
[Black "Garcia, Raimundo"]
[Result "1/2-1/2"]
[ECO "B48"]
[EventDate "1969.03.22"]
[PlyCount "50"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.Be3 Nf6 7.a3 Nc6 8.f4 d6 
9.Qf3 Be7 10.Bd3 O-O 11.O-O Bd7 12.Kh1 Rac8 13.Rae1 Nxd4 14.Bxd4 e5 15.Nd5
Nxd5 16.exd5 exd4 17.Rxe7 Rce8 18.Qe2 Rxe7 19.Qxe7 Re8 20.Qh4 f5 21.Re1 
Qd8 22.Rxe8+ Qxe8 23.Qf2 Qe7 24.h3 Qf6 25.Qe1 g5 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "2"]
[White "Rossetto, Hector Decio"]
[Black "Quinteros, Miguel Angel"]
[Result "1/2-1/2"]
[ECO "A25"]
[EventDate "1969.03.22"]
[PlyCount "54"]

1.c4 e5 2.Nc3 d6 3.g3 g6 4.Bg2 Bg7 5.e3 Nc6 6.Nge2 Be6 7.d3 Nge7 8.Nd5 O-O
9.Rb1 Qd7 10.b4 Rae8 11.Qa4 a6 12.Bd2 Nxd5 13.cxd5 Ne7 14.Qxd7 Bxd7 15.Nc3
c6 16.O-O cxd5 17.Nxd5 Nxd5 18.Bxd5 Bb5 19.Bc4 Rc8 20.Bxb5 axb5 21.Rfc1 f5
22.e4 Kf7 23.Rxc8 Rxc8 24.Rc1 Rc6 25.f3 Ke6 26.Kf2 Bf6 27.Ke2 Bd8 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "2"]
[White "Rubinetti, Jorge Alberto"]
[Black "Mendivil Salinas, Ismael"]
[Result "1-0"]
[ECO "E94"]
[EventDate "1969.03.22"]
[PlyCount "109"]

1.e4 g6 2.d4 d6 3.c4 Bg7 4.Nc3 Nf6 5.Be2 O-O 6.Nf3 e5 7.Be3 Ng4 8.Bg5 f6 
9.Bh4 Nd7 10.O-O c6 11.Qc2 Qe8 12.Rad1 g5 13.Bg3 h5 14.h3 Nh6 15.dxe5 dxe5
16.b4 Qg6 17.c5 Re8 18.Bc4+ Kh8 19.Qb3 h4 20.Bh2 Nf8 21.Rd6 Qh5 22.Nd2 g4 
23.hxg4 Bxg4 24.f3 Bc8 25.Nd1 Nh7 26.Ne3 Ng5 27.Kh1 Nhf7 28.Bxf7 Nxf7 29.
Rd3 Be6 30.Ndc4 Bh6 31.Qc2 Rg8 32.Nd6 Ng5 33.Ndf5 h3 34.g4 Qg6 35.Qf2 Rgd8
36.Rd6 Bf8 37.Nh4 Qh7 38.Rxd8 Rxd8 39.Nef5 Bc4 40.Rc1 Be6 41.Qe3 Qd7 42.
Bxe5 Bg7 43.Bd4 Bxa2 44.Qc3 Qe6 45.Re1 Qc4 46.Qxc4 Bxc4 47.Nd6 Bg8 48.Kh2 
Kh7 49.Kg3 b6 50.Nhf5 Rb8 51.f4 bxc5 52.Bxc5 Ne6 53.Rh1 Nxc5 54.Rxh3+ Kg6 
55.Ne7# 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "2"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Bronstein, Luis Marcos"]
[Result "1/2-1/2"]
[ECO "C91"]
[EventDate "1969.03.22"]
[PlyCount "119"]

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.d4 Bg4 10.Be3 exd4 11.cxd4 Na5 12.Bc2 Nc4 13.Bc1 c5 14.b3 Na5 15.Bb2 
cxd4 16.Qxd4 Rc8 17.Nc3 Nc6 18.Qe3 Bxf3 19.gxf3 Ne5 20.Rac1 Qd7 21.f4 Qg4+
22.Kh1 Ng6 23.Ne2 Qh4 24.Qg3 Nh5 25.Qxh4 Bxh4 26.f5 Ne5 27.Ng3 Nf4 28.Ba3 
b4 29.Bb2 Bg5 30.Bxe5 dxe5 31.Bb1 h5 32.Rcd1 h4 33.Ne2 Nxe2 34.Rxe2 Rc3 
35.Rc2 Rfc8 36.Rxc3 bxc3 37.Bc2 Bd2 38.Kg2 Kf8 39.Kh3 Ke7 40.Kxh4 Rh8+ 41.
Kg3 Bf4+ 42.Kf3 Rh3+ 43.Ke2 Rxh2 44.Rd3 Bd2 45.Rd5 Bf4 46.Rd3 Bd2 47.b4 g5
48.fxg6 fxg6 49.Rd5 Bf4 50.Ra5 g5 51.Rxa6 g4 52.Kd3 Rxf2 53.Rg6 g3 54.b5 
g2 55.b6 Bg3 56.Rxg3 Rf3+ 57.Rxf3 g1=Q 58.Kxc3 Qd4+ 59.Kb3 Qxb6+ 60.Ka3 
1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "3"]
[White "Bronstein, Luis Marcos"]
[Black "Mecking, Henrique"]
[Result "0-1"]
[ECO "B53"]
[EventDate "1969.03.22"]
[PlyCount "60"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4 Nc6 5.Bb5 Bd7 6.Bxc6 Bxc6 7.Nc3 Nf6 8.
Bg5 e6 9.O-O-O Be7 10.Kb1 O-O 11.Rhe1 Qa5 12.Qd2 Kh8 13.Nd4 Rfc8 14.f4 h6 
15.Nb3 Qb6 16.Bxf6 Bxf6 17.Qxd6 Bxc3 18.bxc3 Rd8 19.Qb4 Rxd1+ 20.Rxd1 Qf2 
21.g3 Qxh2 22.Rd3 Qh1+ 23.Kb2 Qxe4 24.Qe7 Kg8 25.Nc5 Qc4 26.Rd4 Qe2 27.
Nxb7 Be4 28.Rd8+ Rxd8 29.Qxd8+ Kh7 30.Qc7 Qb5+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "3"]
[White "Camara, Helder"]
[Black "Rossetto, Hector Decio"]
[Result "1-0"]
[ECO "D02"]
[EventDate "1969.03.22"]
[PlyCount "103"]

1.Nf3 d5 2.d4 Nf6 3.Bf4 g6 4.e3 Bg7 5.Bd3 O-O 6.Nbd2 c5 7.c3 Nc6 8.Bg3 
cxd4 9.cxd4 Nh5 10.Qb3 Nxg3 11.hxg3 Qd6 12.O-O Bd7 13.Rac1 Rfb8 14.a3 e6 
15.Qd1 Be8 16.Nb3 Bf8 17.Qd2 a5 18.Bb5 b6 19.Qd3 a4 20.Nbd2 Ra5 21.Qe2 Na7
22.Bxe8 Rxe8 23.Ne5 f6 24.Nd3 Qd7 25.f4 Rc8 26.g4 Rxc1 27.Rxc1 Bd6 28.Nf3 
Nc6 29.g5 fxg5 30.Nxg5 Ra8 31.Qg4 Re8 32.Qh3 Na5 33.Rf1 Nc4 34.Ne5 Qe7 35.
Nef7 h5 36.g4 Rf8 37.Nxd6 Nxd6 38.gxh5 gxh5 39.Qxh5 Rf6 40.Rf2 Qg7 41.Rg2 
Rg6 42.Qxg6 Qxg6 43.Nxe6 Qxg2+ 44.Kxg2 Nc4 45.Nc7 Nxb2 46.Nxd5 Nc4 47.Kf3 
b5 48.Nc3 Nxa3 49.Ke2 Kf7 50.Kd3 Ke6 51.e4 Kd6 52.f5 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "3"]
[White "Garcia, Raimundo"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "C47"]
[EventDate "1969.03.22"]
[PlyCount "66"]

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nc3 Bb4 6.Nxc6 bxc6 7.Bd3 d5 8.
exd5 cxd5 9.O-O O-O 10.Bg5 Be6 11.Nb5 c5 12.a3 Ba5 13.b4 Bb6 14.c3 h6 15.
Bh4 Rc8 16.a4 a5 17.bxc5 Bxc5 18.Re1 Bd7 19.Rb1 Rc6 20.Nd4 Rb6 21.Bb5 Qc7 
22.Bxd7 Rxb1 23.Qxb1 Nxd7 24.Bg3 Qb6 25.Qf5 Bxd4 26.cxd4 Qc6 27.h4 Nb6 28.
Re7 Qxa4 29.Qg4 Nc4 30.Rd7 h5 31.Qf5 g6 32.Qh3 Qd1+ 33.Kh2 Nd2 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "3"]
[White "Mendivil Salinas, Ismael"]
[Black "Riego Prieto, Victorio"]
[Result "0-1"]
[ECO "B07"]
[EventDate "1969.03.22"]
[PlyCount "68"]

1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.f3 Nf6 5.Be3 O-O 6.Qd2 Nc6 7.g4 e5 8.d5 Nd4 9.
Nce2 Nxf3+ 10.Nxf3 Bxg4 11.Neg1 Nxe4 12.Qg2 f5 13.O-O-O Nf6 14.h3 Bh5 15.
Re1 f4 16.Bd2 Qe7 17.Bc4 a5 18.Qf1 Kh8 19.Ng5 Bh6 20.Ne6 Rfb8 21.a3 b5 22.
Bb3 c5 23.c4 a4 24.Bc2 Qb7 25.Bc3 f3+ 26.Bd2 Bxd2+ 27.Kxd2 bxc4 28.Qxc4 
Nxd5 29.Nxf3 Bxf3 30.Rhf1 Ne7 31.Ng5 Bd5 32.Qh4 Nf5 33.Bxf5 gxf5 34.Rxf5 
Qxb2+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "3"]
[White "Najdorf, Miguel"]
[Black "Rodriguez Vargas, Orestes"]
[Result "1-0"]
[ECO "A81"]
[EventDate "1969.03.22"]
[PlyCount "87"]

1.d4 f5 2.Nf3 Nf6 3.g3 g6 4.b3 Bg7 5.Bb2 O-O 6.Bg2 Ne4 7.O-O d5 8.Ne5 f4 
9.Nd2 Ng5 10.Ndf3 Nh3+ 11.Kh1 fxg3 12.hxg3 Nc6 13.Kh2 Nxe5 14.dxe5 Qd7 15.
e6 Qxe6 16.Bxg7 Kxg7 17.Qd4+ Rf6 18.Qh4 g5 19.Nxg5 Nxg5 20.Qxg5+ Rg6 21.
Qxd5 Qxd5 22.Bxd5 c6 23.Bg2 h5 24.Rad1 Be6 25.Rd4 Rh8 26.Bf3 Rg5 27.Rfd1 
Ra5 28.a4 Rc5 29.R1d2 b5 30.Kg2 a5 31.Kf1 Bf5 32.e4 Be6 33.e5 Bf5 34.Be4 
Bh3+ 35.Kg1 h4 36.g4 Bxg4 37.Bxc6 Bf5 38.axb5 Bxc2 39.Rg4+ Kf7 40.Bd5+ e6 
41.Bc4 Bf5 42.Rd7+ Ke8 43.Rgg7 Rg8 44.b6 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "3"]
[White "Quinteros, Miguel Angel"]
[Black "Garcia Toledo, Pedro"]
[Result "1-0"]
[ECO "A14"]
[EventDate "1969.03.22"]
[PlyCount "73"]

1.c4 Nf6 2.Nf3 e6 3.g3 b6 4.Bg2 Bb7 5.O-O Be7 6.b3 O-O 7.Bb2 c5 8.d3 Nc6 
9.e3 d5 10.Qe2 Qc7 11.Nc3 Rad8 12.Rac1 Rfe8 13.Rfd1 e5 14.cxd5 Nxd5 15.
Nxd5 Rxd5 16.Nd4 Rd7 17.Nxc6 Bxc6 18.Bxe5 Bd6 19.Bxc6 Qxc6 20.Bb2 Red8 21.
d4 Qe4 22.Ba3 cxd4 23.Rxd4 Qe6 24.Rc6 Bxa3 25.Rxe6 fxe6 26.Qc4 Rxd4 27.
Qxe6+ Kf8 28.Qf5+ Ke7 29.exd4 g6 30.Qe4+ Kd6 31.Qb7 Rd7 32.Qa8 Bb2 33.d5 
Bd4 34.Qc6+ Ke7 35.Qe6+ Kd8 36.d6 Bc5 37.Qg8# 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "3"]
[White "Rocha, Antonio Cavilhas"]
[Black "Canobra, Juvenal"]
[Result "1/2-1/2"]
[ECO "B38"]
[EventDate "1969.03.22"]
[PlyCount "141"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 Nf6 7.Nc3 d6 8.Be2 
O-O 9.O-O Bd7 10.Rc1 Nxd4 11.Bxd4 Bc6 12.b4 e5 13.Be3 Nxe4 14.b5 Nxc3 15.
Rxc3 Be4 16.g4 b6 17.f3 Bb7 18.Rd3 Qc7 19.Rxd6 Rad8 20.Rxd8 Rxd8 21.Qa4 
Bc8 22.Rd1 Rxd1+ 23.Qxd1 Be6 24.Kg2 Bf8 25.a4 Bc5 26.Bg5 Bd4 27.Qd2 Qc5 
28.Bf6 Qf8 29.a5 bxa5 30.Qxa5 Qd6 31.Qd8+ Qxd8 32.Bxd8 f5 33.g5 Kf7 34.Bf6
h6 35.h4 hxg5 36.hxg5 Bc8 37.f4 Ke6 38.Kf1 Bb7 39.Ke1 Be3 40.Bxe5 Be4 41.
Kd1 Kd7 42.Bf1 Ke6 43.Ke2 Bc5 44.Kd2 Kd7 45.Kc3 Be3 46.Kb3 Ke6 47.Ka4 Kd7 
48.Ka5 Bb7 49.Bd3 Bc5 50.Ka4 Be3 51.Bc2 Bf3 52.Ka5 Bb7 53.Kb4 Bd2+ 54.Kb3 
Be3 55.Kc3 Bf3 56.Ba4 Kc8 57.Kb4 Kb7 58.c5 Bd5 59.Bd1 a5+ 60.bxa6+ Kxa6 
61.Bd6 Bd2+ 62.Ka4 Be3 63.Be2+ Kb7 64.Ka5 Bd2+ 65.Kb5 Bc1 66.Bf1 Bb2 67.
Be5 Ba3 68.Ka5 Bxc5 69.Ba6+ Ka7 70.Bc8 Bc6 71.Be6 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "3"]
[White "Schweber, Samuel"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "1/2-1/2"]
[ECO "A29"]
[EventDate "1969.03.22"]
[PlyCount "108"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.g3 d5 5.cxd5 Nxd5 6.Bg2 Be6 7.O-O Be7 8.d4 
exd4 9.Nb5 Qd7 10.Nbxd4 Nxd4 11.Nxd4 Bh3 12.Bxh3 Qxh3 13.e4 Nf6 14.Qf3 Bc5
15.Nb5 O-O-O 16.Bf4 Rd3 17.Qh1 c6 18.Rac1 Nd7 19.b4 Bxb4 20.Nxa7+ Kd8 21.
Rxc6 bxc6 22.Nxc6+ Kc8 23.Nxb4 Qxf1+ 24.Kxf1 Rd1+ 25.Kg2 Rxh1 26.Kxh1 Kb7 
27.Kg2 Nc5 28.f3 Ra8 29.Be3 Na6 30.a3 Nc7 31.Bc1 Nb5 32.Bb2 g6 33.g4 Nxa3 
34.Bxa3 Rxa3 35.g5 Ra8 36.Kg3 Kc7 37.h4 Kd6 38.Nd5 Ke5 39.Ne3 Ra2 40.Ng4+ 
Ke6 41.Kf4 Ra5 42.Kg3 Rb5 43.Kf4 Rb8 44.Nf2 Rh8 45.Ng4 Kd6 46.Nf6 Ke6 47.
Ng4 Ra8 48.Nh6 Ra1 49.Ng4 Ra8 50.Nf2 Rd8 51.Ke3 h6 52.Nd3 hxg5 53.hxg5 Rc8
54.Nf4+ Ke7 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "3"]
[White "Silva Sanchez, Carlos"]
[Black "Rubinetti, Jorge Alberto"]
[Result "0-1"]
[ECO "B44"]
[EventDate "1969.03.22"]
[PlyCount "80"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nb5 d6 6.Bf4 e5 7.Be3 Nf6 8.f3 a6 
9.N5c3 Be7 10.Bc4 Na5 11.Nd2 Be6 12.Bxe6 fxe6 13.O-O O-O 14.f4 Rc8 15.fxe5
dxe5 16.Kh1 Qc7 17.Qf3 Nc4 18.Nxc4 Qxc4 19.Rfd1 Nd5 20.Nxd5 exd5 21.Qg4 d4
22.Bg1 Rf4 23.Qd7 Rc7 24.Qe8+ Rf8 25.Qh5 Qe6 26.Qe2 Rfc8 27.c3 dxc3 28.
bxc3 Rxc3 29.Qd2 Rc2 30.Qd5 Qxd5 31.Rxd5 R8c4 32.Rb1 b5 33.Rxe5 Bf6 34.
Re8+ Kf7 35.Ra8 Rxa2 36.Rxb5 axb5 37.Rxa2 Rxe4 38.g3 Re1 39.Kg2 b4 40.Ra7+
Re7 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "4"]
[White "Alvarez del Monte, Jose Luis"]
[Black "Mendivil Salinas, Ismael"]
[Result "1/2-1/2"]
[ECO "E87"]
[EventDate "1969.03.22"]
[PlyCount "84"]

1.e4 g6 2.d4 d6 3.c4 Nf6 4.Nc3 Bg7 5.f3 O-O 6.Be3 e5 7.d5 c5 8.Qd2 Ne8 9.
O-O-O Na6 10.h4 Nac7 11.h5 a6 12.g4 Qe7 13.Nge2 b5 14.Ng3 Bd7 15.Bd3 bxc4 
16.Bb1 Nb5 17.Nxb5 axb5 18.Rdg1 Nc7 19.Bh6 Bxh6 20.Qxh6 g5 21.f4 f6 22.
fxg5 fxg5 23.Nf5 Qf6 24.Qxf6 Rxf6 25.h6 Be8 26.Rf1 Ra6 27.Ng3 Rf4 28.Ne2 
Rxf1+ 29.Rxf1 Bg6 30.Ng3 Ne8 31.Nf5 Ra7 32.a4 Bxf5 33.Rxf5 Rxa4 34.Rxg5+ 
Kf7 35.Rf5+ Kg6 36.g5 Ra7 37.Rf8 Re7 38.Rg8+ Kf7 39.Rh8 Kg6 40.Rg8+ Kf7 
41.Rh8 Kg6 42.Rg8+ Kf7 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "4"]
[White "Canobra, Juvenal"]
[Black "Garcia, Raimundo"]
[Result "0-1"]
[ECO "B23"]
[EventDate "1969.03.22"]
[PlyCount "80"]

1.e4 c5 2.Nc3 e6 3.g3 d5 4.Bg2 dxe4 5.Nxe4 Nh6 6.b3 Nf5 7.Ne2 Be7 8.Bb2 
Nc6 9.O-O O-O 10.f4 b6 11.Kh1 Bb7 12.a3 Rc8 13.Qe1 Qd7 14.Ng1 Ncd4 15.Rc1 
a5 16.Nf3 Nxf3 17.Bxf3 a4 18.bxa4 Nd4 19.Bg2 Ba6 20.d3 Qxa4 21.Rf2 Qd7 22.
Qd1 Bb7 23.Rb1 Qc7 24.c3 Nf5 25.Bc1 Ra8 26.Rfb2 Ra6 27.Qe2 Rd8 28.Rb5 Bc6 
29.R5b3 Ba4 30.d4 c4 31.Nd2 Bxb3 32.Nxb3 Bxa3 33.Nd2 Bxc1 34.Rxc1 b5 35.
Ne4 Qa7 36.Re1 Ra2 37.Qg4 Ra1 38.Rd1 Ne3 39.Nf6+ Kh8 40.Qh4 Rxd1+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "4"]
[White "Garcia Toledo, Pedro"]
[Black "Camara, Helder"]
[Result "1/2-1/2"]
[ECO "A68"]
[EventDate "1969.03.22"]
[PlyCount "185"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 O-O 5.f4 d6 6.Nf3 c5 7.d5 e6 8.Be2 exd5 9.
cxd5 b5 10.e5 dxe5 11.fxe5 Ng4 12.Bf4 Re8 13.Bxb5 Nd7 14.O-O Ngxe5 15.Nxe5
Bxe5 16.Qf3 Rf8 17.Bc6 Rb8 18.Bxd7 Bd4+ 19.Kh1 Bxd7 20.Bxb8 Qxb8 21.Ne4 
Bf5 22.Rac1 Qb6 23.b3 h5 24.Rce1 Kg7 25.Ng3 Bg4 26.Qf4 Qd8 27.d6 Be6 28.
Ne4 h4 29.Nxc5 Bxc5 30.Qe5+ Kg8 31.Qxc5 h3 32.Rf4 Qa8 33.Qc2 Bd5 34.Kg1 
Bxg2 35.Rd1 Bd5 36.Rd2 Be6 37.Rf6 Rc8 38.Qd1 Qe4 39.Rf3 Bg4 40.d7 Rd8 41.
Rdd3 Bxf3 42.Qxf3 Qxf3 43.Rxf3 Rxd7 44.a4 Rd2 45.Rxh3 Rb2 46.Rc3 Kg7 47.
Rc7 Rxb3 48.Kf2 a5 49.Ra7 Kh6 50.Rxa5 f5 51.Rb5 Ra3 52.a5 Kg5 53.Kg2 Kg4 
54.Rb4+ f4 55.h3+ Kg5 56.Rb5+ Kh4 57.Rb6 Kh5 58.a6 g5 59.Rf6 Ra2+ 60.Kg1 
Kh4 61.Rg6 Ra3 62.Kf2 Kh5 63.Rg8 Rxa6 64.Rh8+ Kg6 65.Rf8 Ra2+ 66.Kf3 Ra3+ 
67.Kg2 Ra2+ 68.Kf3 Rh2 69.Rh8 Kf5 70.Rf8+ Ke5 71.Re8+ Kd4 72.Rd8+ Kc3 73.
Rh8 Rh1 74.h4 Rh3+ 75.Ke4 Re3+ 76.Kf5 f3 77.Kxg5 f2 78.Rf8 Rg3+ 79.Kh6 Rg2
80.h5 Kd4 81.Kh7 Ke3 82.h6 Rg3 83.Rxf2 Kxf2 84.Kh8 Kf3 85.h7 Kg4 86.Kg7 
Kf5+ 87.Kf7 Rh3 88.Kg7 Rg3+ 89.Kf7 Ra3 90.h8=Q Ra7+ 91.Kf8 Ra8+ 92.Kg7 
Rxh8 93.Kxh8 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "4"]
[White "Mecking, Henrique"]
[Black "Schweber, Samuel"]
[Result "1-0"]
[ECO "E47"]
[EventDate "1969.03.22"]
[PlyCount "79"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d6 6.Ne2 e5 7.O-O Re8 8.Ng3 Bxc3
9.bxc3 e4 10.Bc2 c6 11.f3 d5 12.cxd5 cxd5 13.c4 exf3 14.Qxf3 Be6 15.c5 Nc6
16.Bd2 Ne7 17.a4 b6 18.Bd3 Ng6 19.Bb5 Re7 20.Nf5 Bxf5 21.Qxf5 bxc5 22.dxc5
Re5 23.Qf3 Qc7 24.Bc3 Rh5 25.Bxf6 Qxh2+ 26.Kf2 gxf6 27.Rh1 Qxh1 28.Rxh1 
Rxh1 29.Qxf6 Rc8 30.c6 Rc1 31.Qd6 Rc2+ 32.Ke1 a6 33.Kd1 Rxg2 34.Bxa6 Rg1+ 
35.Kc2 Rg2+ 36.Kc3 Re8 37.c7 Rxe3+ 38.Bd3 d4+ 39.Qxd4 Re8 40.Qd8 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "4"]
[White "Panno, Oscar"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "E46"]
[EventDate "1969.03.22"]
[PlyCount "82"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Ne2 d5 6.a3 Be7 7.cxd5 Nxd5 8.Qc2 
Nd7 9.Bd2 N5f6 10.Ng3 c5 11.dxc5 Nxc5 12.Be2 b6 13.O-O Bb7 14.Rfd1 Rc8 15.
Rac1 Qc7 16.Qb1 Qb8 17.b4 Ncd7 18.Nb5 a6 19.Nd4 Ne5 20.f3 Bd6 21.Nf1 Rfd8 
22.Rxc8 Qxc8 23.Rc1 Qd7 24.Be1 Nd5 25.Qb2 Be7 26.b5 a5 27.Bf2 Rc8 28.Nd2 
Rxc1+ 29.Qxc1 Qd6 30.f4 Nd7 31.Nc4 Qc7 32.Qc2 Bf6 33.g3 Bxd4 34.exd4 N5f6 
35.Bd3 g6 36.Ne5 Qd6 37.Nc6 Qxa3 38.d5 Nxd5 39.Nd8 Nb4 40.Qc7 Nxd3 41.Qxb7
Qc1+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "4"]
[White "Riego Prieto, Victorio"]
[Black "Silva Sanchez, Carlos"]
[Result "1-0"]
[ECO "C63"]
[EventDate "1969.03.22"]
[PlyCount "103"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.d3 fxe4 5.dxe4 Nf6 6.Bg5 d6 7.Nc3 Be7 8.Bxf6 
Bxf6 9.Qd5 Bd7 10.O-O Qe7 11.Qb3 O-O-O 12.Nd5 Qf8 13.Qc3 g5 14.Rad1 h5 15.
Nd2 Re8 16.Nc4 Bd8 17.b4 Rh7 18.Ba4 Nd4 19.Bxd7+ Kxd7 20.Rd2 g4 21.Qa3 a6 
22.c3 Nc6 23.Nce3 Bg5 24.Rfd1 Re6 25.Qb3 Rg6 26.b5 axb5 27.Qxb5 Qb8 28.Rb2
Bxe3 29.Nxe3 h4 30.Nc4 Rh5 31.Na5 Qa7 32.Nxb7 g3 33.Nc5+ Ke7 34.Nd3 h3 35.
hxg3 Rxg3 36.Kh2 Rxg2+ 37.Kh1 Qa8 38.Nf4 Rhg5 39.Nd5+ Kf7 40.Nxc7 Rg1+ 41.
Rxg1 Rxg1+ 42.Kxg1 Qg8+ 43.Kf1 Qg2+ 44.Ke2 Qxe4+ 45.Kd2 h2 46.Rb1 h1=Q 47.
Rxh1 Qxh1 48.Qc4+ Kf6 49.Qe6+ Kg5 50.Qg8+ Kf5 51.Qf7+ Kg4 52.Qg6+ 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "4"]
[White "Rodriguez Vargas, Orestes"]
[Black "Quinteros, Miguel Angel"]
[Result "1-0"]
[ECO "A56"]
[EventDate "1969.03.22"]
[PlyCount "113"]

1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 g6 6.Be2 Bg7 7.Be3 Na6 8.a3 Nc7 9.
Rb1 Bd7 10.b4 b6 11.Nf3 Ng4 12.Bg5 f6 13.Bc1 f5 14.exf5 Bxf5 15.Bd3 O-O 
16.O-O Qd7 17.Ng5 Nf6 18.Nge4 Bxe4 19.Bxe4 Rab8 20.Qd3 Kh8 21.Bd2 Ng8 22.
bxc5 bxc5 23.Rxb8 Rxb8 24.Rb1 Qc8 25.Rxb8 Qxb8 26.Bxg6 Nf6 27.Qb1 Qf8 28.
Be4 Bh6 29.Qc1 Ng4 30.f3 Bxd2 31.Qxd2 Nf6 32.Qg5 Na8 33.Bd3 Nb6 34.Nb5 a6 
35.Nc7 Qe7 36.h4 a5 37.Ne8 Nbd7 38.Nxf6 Qxf6 39.Qxf6+ Nxf6 40.g4 h6 41.Bf5
Ne8 42.Kf2 Nc7 43.Ke3 Kg7 44.f4 Kf6 45.Ke4 exf4 46.Kxf4 Na8 47.g5+ hxg5+ 
48.hxg5+ Ke7 49.Bd3 Nb6 50.Kf5 Nd7 51.Be2 Ne5 52.g6 Nd7 53.g7 Kf7 54.g8=Q+
Kxg8 55.Ke6 Nb6 56.Kxd6 Na4 57.Kc7 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "4"]
[White "Rossetto, Hector Decio"]
[Black "Bronstein, Luis Marcos"]
[Result "0-1"]
[ECO "A72"]
[EventDate "1969.03.22"]
[PlyCount "82"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Nf3 c5 7.d5 e6 8.Bg5 h6 9.
Bh4 exd5 10.cxd5 g5 11.Bg3 Nh5 12.Nd2 Nxg3 13.hxg3 Nd7 14.Nc4 Qe7 15.O-O 
Nf6 16.Qc2 b6 17.a4 Rb8 18.Ne3 a6 19.Rfe1 Re8 20.Bd3 h5 21.Re2 Ng4 22.Nf5 
Qe5 23.Qd2 Qf6 24.Nxg7 Kxg7 25.e5 Rxe5 26.Rxe5 Nxe5 27.Ne4 Qe7 28.Re1 Nxd3
29.Qxd3 Bf5 30.Qc3+ Qe5 31.Nxd6 Qxc3 32.bxc3 Bc2 33.Re5 Bxa4 34.Rxg5+ Kf6 
35.Ne4+ Ke7 36.Re5+ Kd7 37.Rf5 Ke7 38.Rxh5 Bc2 39.Re5+ Kd7 40.f3 Bxe4 41.
fxe4 b5 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "4"]
[White "Rubinetti, Jorge Alberto"]
[Black "Rocha, Antonio Cavilhas"]
[Result "1-0"]
[ECO "D30"]
[EventDate "1969.03.22"]
[PlyCount "53"]

1.Nf3 d5 2.g3 c5 3.Bg2 Nc6 4.d4 Nf6 5.O-O e6 6.c4 Be7 7.cxd5 exd5 8.dxc5 
Bxc5 9.Nbd2 O-O 10.Nb3 Bb6 11.Nbd4 Re8 12.b3 Ne4 13.Bb2 Bg4 14.Rc1 Rc8 15.
Rc2 Bxf3 16.Nxf3 d4 17.a3 Qd5 18.b4 Rcd8 19.Qd3 a5 20.b5 Na7 21.Nd2 f5 22.
Nc4 Qxb5 23.a4 Qc6 24.Qb3 Re6 25.Ne3 Qd6 26.Nxf5 Qd5 27.Qxb6 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "5"]
[White "Bronstein, Luis Marcos"]
[Black "Garcia Toledo, Pedro"]
[Result "1/2-1/2"]
[ECO "C77"]
[EventDate "1969.03.22"]
[PlyCount "113"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d3 d6 6.c3 g6 7.Nbd2 Bg7 8.Nf1 O-O 
9.Bg5 h6 10.Bh4 b5 11.Bb3 Be6 12.Ne3 Qd7 13.Bxf6 Bxf6 14.h4 Bg7 15.h5 g5 
16.Qd2 Rad8 17.g4 Ne7 18.Nf5 f6 19.Bxe6+ Qxe6 20.Nxe7+ Qxe7 21.Qe2 d5 22.
O-O Rf7 23.Rfd1 Qe6 24.Nh2 Bf8 25.Kg2 Rfd7 26.Nf1 dxe4 27.dxe4 Rxd1 28.
Rxd1 Rxd1 29.Qxd1 Qxa2 30.Ne3 Qe6 31.Nf5 Qc6 32.Kf3 Kf7 33.Qd5+ Qe6 34.Qb7
Qb6 35.Qd5+ Qe6 36.Qb7 Qb6 37.Qxb6 cxb6 38.Ke3 Ke6 39.Kd3 Kd7 40.f3 Kc6 
41.Ne3 Be7 42.b3 Kc5 43.Kc2 a5 44.Nd5 Bd8 45.b4+ Kc6 46.Kb3 Kb7 47.c4 Kc6 
48.cxb5+ Kxb5 49.Nc3+ Kc6 50.Kc4 Be7 51.b5+ Kd7 52.Na4 Bd8 53.Kd5 Bc7 54.
Nc3 Bd6 55.Na4 Bc7 56.Kc4 Ke6 57.Nc3 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "5"]
[White "Camara, Helder"]
[Black "Rodriguez Vargas, Orestes"]
[Result "0-1"]
[ECO "C47"]
[EventDate "1969.03.22"]
[PlyCount "134"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Nc3 Be7 5.O-O d6 6.h3 Na5 7.Bb5+ c6 8.Be2 c5
9.Bb5+ Nc6 10.Bxc6+ bxc6 11.d3 Rb8 12.b3 O-O 13.Nh2 d5 14.Qe2 Re8 15.Bb2 
Bd6 16.Rad1 Be6 17.Na4 g6 18.g4 h5 19.f3 Nh7 20.f4 exf4 21.e5 Bf8 22.Rxf4 
Qh4 23.Qf2 Qxh3 24.g5 Nxg5 25.Rf1 d4 26.Bc1 Be7 27.Nxc5 Bxc5 28.Rh4 Qf5 
29.Qxf5 Bxf5 30.Bxg5 Rb7 31.Bf6 Be7 32.Nf3 c5 33.Rh2 Bxf6 34.exf6 Re6 35.
Nh4 Bg4 36.Rhf2 Rbb6 37.Kh2 Kh7 38.Nf3 Bxf3 39.Rxf3 Re2+ 40.Kg3 Rbe6 41.
R3f2 Kh6 42.a3 a5 43.b4 axb4 44.axb4 cxb4 45.Rxe2 Rxe2 46.Rb1 Rxc2 47.Rxb4
Kg5 48.Rxd4 Kxf6 49.Kf3 Kg5 50.Rd7 f5 51.d4 h4 52.d5 h3 53.d6 h2 54.Rh7 
Rd2 55.d7 Rxd7 56.Rxh2 f4 57.Ke4 Re7+ 58.Kf3 Re3+ 59.Kf2 Ra3 60.Rg2+ Kf5 
61.Rh2 Ra2+ 62.Kf3 Ra3+ 63.Kf2 g5 64.Rh8 Kg4 65.Rf8 Ra2+ 66.Kg1 Kg3 67.Kf1
f3 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "5"]
[White "Garcia, Raimundo"]
[Black "Rubinetti, Jorge Alberto"]
[Result "1/2-1/2"]
[ECO "D94"]
[EventDate "1969.03.22"]
[PlyCount "114"]

1.Nf3 Nf6 2.c4 c6 3.Nc3 d5 4.e3 g6 5.d4 Bg7 6.Bd2 O-O 7.Rc1 e6 8.Bd3 Nbd7 
9.O-O b6 10.e4 dxe4 11.Nxe4 c5 12.Bc3 Bb7 13.Qe2 Qc7 14.dxc5 bxc5 15.Rfe1 
Rad8 16.Ng3 Qc6 17.Qc2 Rfe8 18.Bf1 h5 19.h3 Qc7 20.Nd2 e5 21.Nge4 Nxe4 22.
Nxe4 Nf8 23.b4 cxb4 24.Bxb4 Ne6 25.c5 a5 26.Bc3 Bxe4 27.Rxe4 Qxc5 28.Rc4 
Qa7 29.Qa4 Re7 30.Qxa5 Qxa5 31.Bxa5 Rd5 32.Bb4 Red7 33.a4 Bh6 34.Re1 Bf8 
35.Bxf8 Kxf8 36.Rce4 Ra7 37.Bc4 Rd4 38.Bxe6 Rxe4 39.Rxe4 fxe6 40.Kh2 Kf7 
41.h4 Kf6 42.Kg3 Ra5 43.Kf3 Rc5 44.Re3 g5 45.hxg5+ Kxg5 46.Ra3 Ra5 47.Ke4 
h4 48.Kd3 Kf4 49.Kc4 e4 50.Kb4 Rg5 51.a5 Rxg2 52.a6 Rg8 53.Kc5 Ra8 54.Kb6 
Kg4 55.a7 h3 56.Rg3+ Kh4 57.Rg7 e5 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "5"]
[White "Najdorf, Miguel"]
[Black "Canobra, Juvenal"]
[Result "1-0"]
[ECO "A81"]
[EventDate "1969.03.22"]
[PlyCount "71"]

1.d4 f5 2.Nf3 Nf6 3.g3 g6 4.b3 Bg7 5.Bb2 O-O 6.Bg2 d6 7.O-O Kh8 8.Nbd2 Nc6
9.c4 e5 10.dxe5 Ng4 11.Qc2 Ngxe5 12.Rad1 a5 13.c5 Nb4 14.Qc1 Nxf3+ 15.Nxf3
d5 16.a3 Na6 17.Bxg7+ Kxg7 18.c6 Qf6 19.Rxd5 bxc6 20.Rxa5 Rb8 21.b4 Rb5 
22.Rxb5 cxb5 23.Rd1 Rd8 24.Rxd8 Qxd8 25.Qc3+ Qf6 26.Nd4 Bd7 27.e3 g5 28.
Bb7 Kg6 29.Bxa6 Qxa6 30.Qxc7 Be6 31.h4 h6 32.Qe5 Bd7 33.Qe7 Qc8 34.hxg5 
hxg5 35.Nf3 g4 36.Ne5+ 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "5"]
[White "Quinteros, Miguel Angel"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "E61"]
[EventDate "1969.03.22"]
[PlyCount "86"]

1.c4 g6 2.d4 Nf6 3.g3 Bg7 4.Bg2 c6 5.e4 d6 6.Nc3 O-O 7.Nf3 Qa5 8.O-O Bg4 
9.h3 Bxf3 10.Bxf3 Nfd7 11.Be3 a6 12.a3 c5 13.d5 b5 14.Be2 bxc4 15.Bxc4 Nb6
16.Be2 N8d7 17.h4 Rfb8 18.Bd2 c4 19.b4 cxb3 20.Qxb3 Nc5 21.Qc2 Nbd7 22.Ra2
Nb3 23.Nb1 Qc5 24.Be3 Bd4 25.Bg5 f6 26.Bf4 Qxc2 27.Rxc2 Ndc5 28.Bf3 Nd3 
29.Nd2 Bc5 30.Rc3 Nxd2 31.Bxd2 Ne5 32.Be2 Rb2 33.Rd1 Ra2 34.Kf1 h5 35.Be1 
Rb8 36.Bxa6 Rbb2 37.Rxc5 dxc5 38.d6 exd6 39.Rxd6 Rb1 40.f4 Raa1 41.fxe5 
Rxe1+ 42.Kf2 Rxe4 43.exf6 Rd4 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "5"]
[White "Rocha, Antonio Cavilhas"]
[Black "Riego Prieto, Victorio"]
[Result "1/2-1/2"]
[ECO "B86"]
[EventDate "1969.03.22"]
[PlyCount "132"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 e6 7.Bb3 Be7 8.Be3 
Qc7 9.Qe2 O-O 10.g4 Nc6 11.g5 Nxd4 12.Bxd4 Nd7 13.Rg1 Re8 14.Rg3 Nf8 15.
Qh5 b5 16.Rf3 Bd8 17.O-O-O Qe7 18.Bf6 Qc7 19.e5 d5 20.Bxd5 Bb7 21.Bxb7 
Qxb7 22.Bxd8 Rexd8 23.Rfd3 Rxd3 24.Rxd3 Rc8 25.f4 Ng6 26.Qf3 Qc7 27.Rd4 
Qc5 28.Qd3 Qb6 29.Ne2 Qa5 30.a3 Qe1+ 31.Qd1 Qf2 32.Rd8+ Rxd8 33.Qxd8+ Nf8 
34.Kd2 Qxh2 35.Qa8 h5 36.gxh6 gxh6 37.Qxa6 Ng6 38.Qa8+ Kg7 39.Qf3 Kf8 40.
c4 bxc4 41.Kc3 Nh4 42.Qe4 Qf2 43.Kxc4 Nf5 44.a4 h5 45.a5 h4 46.a6 Ne3+ 47.
Kb3 Nd5 48.Nd4 Qd2 49.Nf3 Qa5 50.Qa4 Qb6+ 51.Ka2 Nb4+ 52.Kb1 Nxa6 53.Nxh4 
Nb4 54.Qa8+ Ke7 55.Nf3 Qc5 56.Qe4 Qb5 57.Nd2 Qa4 58.b3 Qa2+ 59.Kc1 Qa1+ 
60.Nb1 Na2+ 61.Kd2 Qb2+ 62.Qc2 Qd4+ 63.Ke2 Nb4 64.Qc4 Qb2+ 65.Nd2 Nd5 66.
Qc5+ Ke8 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "5"]
[White "Schweber, Samuel"]
[Black "Rossetto, Hector Decio"]
[Result "1/2-1/2"]
[ECO "E77"]
[EventDate "1969.03.22"]
[PlyCount "36"]

1.e4 d6 2.d4 g6 3.c4 Bg7 4.Nc3 Nf6 5.Be2 O-O 6.f4 c5 7.d5 e6 8.Nf3 exd5 9.
exd5 Re8 10.O-O Bf5 11.Bd3 Ne4 12.Nxe4 Bxe4 13.Bxe4 Rxe4 14.Qc2 Re8 15.Bd2
Nd7 16.Rae1 Rxe1 17.Rxe1 Qf8 18.Bc3 Re8 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "5"]
[White "Silva Sanchez, Carlos"]
[Black "Alvarez del Monte, Jose Luis"]
[Result "1/2-1/2"]
[ECO "D46"]
[EventDate "1969.03.22"]
[PlyCount "81"]

1.d4 Nf6 2.Nf3 e6 3.e3 d5 4.Bd3 Nbd7 5.Nbd2 Bd6 6.O-O O-O 7.c4 c6 8.e4 
dxe4 9.Nxe4 Nxe4 10.Bxe4 Nf6 11.Bc2 h6 12.b3 b6 13.Bb2 Bb7 14.Qe2 Qc7 15.
Ne5 Rfd8 16.Rad1 c5 17.dxc5 Bxc5 18.Ng4 Nxg4 19.Qxg4 Bf8 20.Rde1 Qe7 21.
Re2 Qg5 22.Qxg5 hxg5 23.Bc3 Rac8 24.Rfe1 Rd7 25.Re3 Rcd8 26.a4 Bc5 27.R3e2
a5 28.Kf1 Bd4 29.Bxd4 Rxd4 30.Be4 Bxe4 31.Rxe4 Rxe4 32.Rxe4 Rd3 33.Re3 Rd6
34.Re5 f6 35.Rb5 Rc6 36.c5 bxc5 37.Rxa5 c4 38.bxc4 Rxc4 39.Ra7 Kh7 40.h3 
Rc2 41.g4 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "5"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Mecking, Henrique"]
[Result "0-1"]
[ECO "B06"]
[EventDate "1969.03.22"]
[PlyCount "38"]

1.e4 g6 2.d4 Bg7 3.Nc3 d6 4.Bg5 c6 5.Qd2 b5 6.O-O-O Nd7 7.Nf3 h6 8.Bf4 Nb6
9.e5 d5 10.Bd3 Be6 11.h4 Rb8 12.Rdg1 b4 13.Nd1 Nc4 14.Bxc4 dxc4 15.c3 Qa5 
16.Kb1 Bf5+ 17.Ka1 Rb6 18.b3 cxb3 19.cxb4 Rxb4 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "6"]
[White "Alvarez del Monte, Jose Luis"]
[Black "Rocha, Antonio Cavilhas"]
[Result "1/2-1/2"]
[ECO "C69"]
[EventDate "1969.03.22"]
[PlyCount "33"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O f6 6.d4 Bg4 7.c3 Bd6 8.Be3 
Qe7 9.Nbd2 Nh6 10.Qc2 Nf7 11.h3 Bxf3 12.Nxf3 g5 13.Rfe1 h5 14.c4 c5 15.d5 
b6 16.Nd2 a5 17.Nf1 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "6"]
[White "Canobra, Juvenal"]
[Black "Quinteros, Miguel Angel"]
[Result "1-0"]
[ECO "B43"]
[EventDate "1969.03.22"]
[PlyCount "93"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.Bd3 Nf6 7.O-O Nc6 8.Nxc6 
bxc6 9.f4 d5 10.e5 Nd7 11.Ne2 f5 12.c3 c5 13.b3 Be7 14.Kh1 Bb7 15.Ng1 O-O 
16.Qh5 Rfd8 17.Nf3 g6 18.Qh6 Bf8 19.Qh3 Bg7 20.Ng5 Nf8 21.Be3 c4 22.bxc4 
dxc4 23.Be2 Bd5 24.a4 Qa5 25.Bd4 Rab8 26.Bf3 h6 27.Bxd5 Qxd5 28.Nf3 Rb2 
29.a5 Qe4 30.Qg3 Qc6 31.Rf2 Qb5 32.Rxb2 Qxb2 33.Qe1 Qb5 34.Qb1 Qd5 35.Qb6 
g5 36.Qxa6 Ng6 37.fxg5 hxg5 38.Nxg5 Nf4 39.Nf3 Bf8 40.Qb6 Rd7 41.a6 Rd8 
42.Qb7 Ra8 43.Rb1 Qd8 44.a7 Nd5 45.Ng5 Nc7 46.Qc6 f4 47.Nxe6 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "6"]
[White "Garcia Toledo, Pedro"]
[Black "Schweber, Samuel"]
[Result "0-1"]
[ECO "E12"]
[EventDate "1969.03.22"]
[PlyCount "52"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.Nc3 Bb7 5.Bg5 Bb4 6.Qc2 h6 7.Bxf6 Qxf6 8.a3 
Bxc3+ 9.bxc3 d6 10.e3 O-O 11.Bd3 c5 12.O-O Nc6 13.Nd2 Rac8 14.f4 Na5 15.
Nb3 Nxb3 16.Qxb3 Rc7 17.Rac1 Rfc8 18.Rc2 d5 19.Qa4 dxc4 20.Bxc4 cxd4 21.
cxd4 Be4 22.Rc3 Qg6 23.Rf2 Qf5 24.Rb2 Qa5 25.Qxa5 bxa5 26.f5 Rxc4 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "6"]
[White "Mendivil Salinas, Ismael"]
[Black "Silva Sanchez, Carlos"]
[Result "0-1"]
[ECO "C17"]
[EventDate "1969.03.22"]
[PlyCount "102"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 cxd4 6.Qxd4 Nc6 7.Bb5 Ba5 8.Nf3 Ne7
9.Bd2 Nf5 10.Qf4 Bd7 11.O-O O-O 12.Bd3 Nce7 13.Rfe1 Rc8 14.h3 Bc7 15.Qb4 
Kh8 16.g4 Nc6 17.Qf4 Nh4 18.Nxh4 Qxh4 19.Nb5 f6 20.g5 Qxf4 21.Bxf4 fxe5 
22.Bg3 Bb8 23.c4 e4 24.Bxb8 Nxb8 25.Bf1 Bxb5 26.cxb5 Nd7 27.b4 Ne5 28.Be2 
Nf3+ 29.Bxf3 Rxf3 30.Rec1 Rfc3 31.h4 Kg8 32.a4 Kf8 33.a5 Ke7 34.b6 axb6 
35.Rxc3 Rxc3 36.a6 bxa6 37.Rxa6 Rc1+ 38.Kg2 d4 39.Kg3 d3 40.Ra2 e5 41.Rd2 
Rc2 42.Rd1 Re2 43.Kg2 Ke6 44.Kf1 Kf5 45.Ra1 e3 46.fxe3 Ke4 47.b5 Kxe3 48.
Ra3 e4 49.Ra4 Kf3 50.Ra3 Rb2 51.Ke1 e3 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "6"]
[White "Panno, Oscar"]
[Black "Camara, Helder"]
[Result "1/2-1/2"]
[ECO "E63"]
[EventDate "1969.03.22"]
[PlyCount "178"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.g3 O-O 5.Bg2 d6 6.Nf3 Nc6 7.O-O a6 8.h3 e5 9.
d5 Ne7 10.c5 e4 11.cxd6 Qxd6 12.Ng5 Nexd5 13.Ngxe4 Qe5 14.Nxf6+ Nxf6 15.
Bf4 Qa5 16.Qa4 Qb6 17.Be5 Be6 18.Qh4 Nd7 19.Bxg7 Kxg7 20.b3 Rad8 21.Rac1 
c6 22.Rc2 Nf6 23.Na4 Qd4 24.Qxd4 Rxd4 25.Nc5 Bc8 26.e3 Rd6 27.g4 h6 28.
Rfc1 Rfd8 29.Bf3 a5 30.Kg2 b6 31.Na4 c5 32.Nb2 Ba6 33.Nc4 Re6 34.Rd1 Rxd1 
35.Bxd1 Nd5 36.Bf3 Nb4 37.Rd2 a4 38.Be2 axb3 39.axb3 Bb7+ 40.Bf3 Bxf3+ 41.
Kxf3 Nc6 42.Rd5 Kf6 43.Kf4 Nb4 44.Rd7 b5 45.Nd6 Nd3+ 46.Kg3 Ne5 47.Ne4+ 
Kg7 48.Rd5 c4 49.Rxb5 Nxg4 50.Nc5 Re5 51.bxc4 Nf6 52.Nd3 Re4 53.Ne5 Ne8 
54.Kf3 Rh4 55.Rb7 Nd6 56.Rc7 Kf6 57.Ng4+ Ke6 58.Kg3 Rh5 59.f3 Rg5 60.f4 
Rh5 61.Kg2 Ra5 62.Nxh6 Ra2+ 63.Kf1 Rc2 64.c5 Nc4 65.e4 Nd2+ 66.Ke1 Nxe4 
67.Nxf7 Nxc5 68.Ng5+ Kd5 69.Kd1 Rc4 70.Ke2 Rb4 71.Kf3 Rb6 72.Kg4 Rb1 73.
Re7 Rg1+ 74.Kf3 Rf1+ 75.Kg3 Rg1+ 76.Kf2 Rh1 77.Re5+ Kc6 78.Re3 Kd5 79.Kg2 
Rb1 80.Re5+ Kc6 81.Re8 Kd7 82.Re3 Ra1 83.Re5 Kc6 84.Ne6 Nd3 85.Re3 Kd5 86.
Kf3 Rf1+ 87.Ke2 Re1+ 88.Kxd3 Rxe3+ 89.Kxe3 Kxe6 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "6"]
[White "Riego Prieto, Victorio"]
[Black "Garcia, Raimundo"]
[Result "0-1"]
[ECO "B43"]
[EventDate "1969.03.22"]
[PlyCount "120"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.Be2 Nf6 7.a3 Be7 8.Be3 d6
9.Qd2 Nc6 10.O-O O-O 11.Rad1 Ne5 12.Kh1 b5 13.f4 Nc4 14.Bxc4 Qxc4 15.Rfe1 
Bb7 16.Bf2 Rfd8 17.Nb3 Qc7 18.Bg3 Rac8 19.Qe2 Ba8 20.Rd2 Qa7 21.Red1 Rxc3 
22.bxc3 Nxe4 23.Rd3 Rc8 24.Be1 f5 25.Nd2 Qd7 26.Nxe4 Bxe4 27.Rh3 g6 28.Bf2
Bf6 29.Qd2 Qc6 30.Rg3 Bxc3 31.Qxd6 Bf6 32.Qxc6 Rxc6 33.Bd4 Bxc2 34.Rd2 Be4
35.Kg1 Rc1+ 36.Kf2 Bh4 37.Be5 Bd5 38.Rb2 Rc4 39.Kf1 Bxg3 40.hxg3 Kf7 41.
Kg1 h6 42.Kh2 g5 43.g4 Kg6 44.fxg5 Rxg4 45.gxh6 Kxh6 46.Rc2 Kg5 47.Kg1 f4 
48.Kf1 Kf5 49.Bd6 e5 50.Rf2 e4 51.g3 f3 52.Rd2 Ke6 53.Bc5 Rxg3 54.Rh2 Bc4+
55.Kf2 Rg5 56.Be3 Rg6 57.Bb6 Bd3 58.Rh5 Rg2+ 59.Ke1 Re2+ 60.Kd1 f2 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "6"]
[White "Rodriguez Vargas, Orestes"]
[Black "Bronstein, Luis Marcos"]
[Result "0-1"]
[ECO "E51"]
[EventDate "1969.03.22"]
[PlyCount "74"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 b6 7.a3 Be7 8.O-O c5 9.
cxd5 exd5 10.Ne5 Bb7 11.f4 Nc6 12.Nxc6 Bxc6 13.Qf3 Qd7 14.Rd1 Rfe8 15.Bd2 
Bd6 16.Kh1 Re7 17.Ne2 c4 18.Bc2 Ba4 19.Bxa4 Qxa4 20.Ng3 Qd7 21.a4 Rae8 22.
a5 b5 23.a6 b4 24.Rdc1 Ne4 25.Nxe4 Rxe4 26.Ra5 Bc7 27.Raa1 Bb6 28.Re1 Qe7 
29.h3 h6 30.Qh5 Qd7 31.Rac1 Qb5 32.Rg1 Bd8 33.Rgf1 Bf6 34.Ra1 c3 35.bxc3 
bxc3 36.Bxc3 Rxe3 37.Rac1 Rxc3 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "6"]
[White "Rossetto, Hector Decio"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "1/2-1/2"]
[ECO "B33"]
[EventDate "1969.03.22"]
[PlyCount "84"]

1.d4 e6 2.Nf3 c5 3.e4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Ndb5 d6 7.Bf4 e5 8.Bg5 
a6 9.Na3 b5 10.Nd5 Qa5+ 11.Bd2 Qd8 12.Nxf6+ Qxf6 13.c4 Qg6 14.f3 Be7 15.
Be3 O-O 16.cxb5 axb5 17.Nxb5 d5 18.Qxd5 Nb4 19.Qxa8 Nc2+ 20.Kf2 Nxe3 21.
Qa7 Bd8 22.Qxe3 Bb6 23.Re1 Rd8 24.Bc4 Qh6 25.Bd5 Ba6 26.a4 Rc8 27.Bb3 Kf8 
28.Re2 g5 29.Rd1 Bxb5 30.axb5 g4 31.Qxb6 Qxb6+ 32.Re3 Rc5 33.fxg4 Rxb5 34.
Rd3 Rb4 35.Kg3 f6 36.Rc3 Ke7 37.h3 Rd4 38.Bd5 Qxb2 39.Rc7+ Kd8 40.Rxh7 Qc2
41.Rf3 Rd3 42.Ra7 Qc1 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "6"]
[White "Rubinetti, Jorge Alberto"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "B25"]
[EventDate "1969.03.22"]
[PlyCount "81"]

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.Bd2 Rb8 10.Rb1 b5 11.a3 c4 12.Be3 cxd3 13.Qxd3 b4 14.axb4 Nxb4 15.Qd2 
Qc7 16.Rfd1 Rd8 17.Qf2 a5 18.g4 Bd7 19.f5 Nec6 20.f6 Bxf6 21.Ng5 Bxg5 22.
Bxg5 f6 23.Bxf6 Rf8 24.g5 e5 25.Nd5 Nxd5 26.exd5 Nd4 27.Be4 Bf5 28.Bxf5 
Nxf5 29.c3 Qc4 30.Rd2 Rb5 31.Qe2 Qxe2 32.Rxe2 Rxd5 33.Ra1 Rb8 34.Ra4 Rdb5 
35.Ra2 Kf7 36.Kf2 Ke6 37.Ke1 Rd5 38.Rd2 Ne3 39.Ke2 Nc4 40.Rc2 h5 41.b4 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "7"]
[White "Bronstein, Luis Marcos"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "A43"]
[EventDate "1969.03.22"]
[PlyCount "68"]

1.d4 Nf6 2.c4 c5 3.d5 g6 4.Nc3 Bg7 5.e4 d6 6.Bd3 e5 7.h3 a6 8.Be3 Nbd7 9.
Qd2 Rb8 10.a4 O-O 11.g4 Ne8 12.Nge2 Nc7 13.Ng3 Nf6 14.f3 Bd7 15.a5 b5 16.
axb6 Rxb6 17.Ra2 Qe7 18.Bg5 Rfb8 19.h4 a5 20.Rh2 Ra8 21.h5 a4 22.h6 Bf8 
23.Rf2 Qd8 24.f4 Be7 25.Bxf6 Bxf6 26.g5 Be7 27.Nf5 Bf8 28.Ng7 Na6 29.Nxa4 
Nb4 30.Nxb6 Rxa2 31.Nxd7 Qxd7 32.f5 Rxb2 33.Qe3 Rb3 34.Rd2 Rxd3 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "7"]
[White "Camara, Helder"]
[Black "Canobra, Juvenal"]
[Result "1/2-1/2"]
[ECO "B48"]
[EventDate "1969.03.22"]
[PlyCount "116"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3 Nc6 6.Be3 Nf6 7.O-O Qc7 8.Nxc6 
dxc6 9.Nd2 e5 10.Nc4 Nd7 11.a4 b5 12.Nd2 Bb7 13.c3 Nc5 14.Bc2 Nxa4 15.Bxa4
bxa4 16.Qxa4 Be7 17.Nc4 O-O 18.Bb6 Qb8 19.Qa5 f6 20.Bc7 Qc8 21.Bd6 Qe6 22.
Qc5 Rf7 23.Rfd1 Rd8 24.Bxe7 Rxd1+ 25.Rxd1 Rxe7 26.Rd8+ Kf7 27.f4 Qg4 28.f5
g5 29.Nd6+ Kg7 30.Nxb7 Rf7 31.Qxc6 Qe2 32.h3 Qe3+ 33.Kf1 Qc1+ 34.Ke2 Qxb2+
35.Kf3 Qxb7 36.Qxb7 Rxb7 37.Ra8 Rc7 38.Rxa6 Rxc3+ 39.Kf2 h5 40.Ra7+ Kg8 
41.Ra2 h4 42.Re2 Rd3 43.Re3 Rd2+ 44.Kf3 Kg7 45.Ra3 Rd7 46.Ra8 Rd3+ 47.Ke2 
Rg3 48.Kf2 g4 49.Ra7+ Kh6 50.Rf7 Kg5 51.hxg4 Rxg4 52.Rg7+ Kf4 53.Rg6 Rg3 
54.Rxf6 Kxe4 55.Rf8 Rg5 56.f6 Rf5+ 57.Ke2 Kd5 58.f7 Ke6 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "7"]
[White "Garcia, Raimundo"]
[Black "Alvarez del Monte, Jose Luis"]
[Result "1-0"]
[ECO "E19"]
[EventDate "1969.03.22"]
[PlyCount "73"]

1.Nf3 Nf6 2.c4 e6 3.g3 b6 4.Bg2 Bb7 5.O-O Qc8 6.b3 Be7 7.Bb2 O-O 8.Nc3 d6 
9.d4 Nbd7 10.d5 e5 11.e4 g6 12.Ne1 Ne8 13.Bh3 Ng7 14.Nc2 Qd8 15.f4 f5 16.
Ne3 Bc8 17.exf5 gxf5 18.fxe5 Nxe5 19.Ne2 Bg5 20.Nf4 Qe8 21.Qd2 Bd7 22.Rae1
Qf7 23.Qd1 Rae8 24.Nc2 Bxf4 25.gxf4 Ng4 26.Qd4 Rxe1 27.Rxe1 Nf6 28.Ne3 Qh5
29.Bg2 Qh4 30.Rf1 Ngh5 31.Bc3 Re8 32.Be1 Nxf4 33.Bxh4 Ne2+ 34.Kf2 Nxd4 35.
Bxf6 f4 36.Bxd4 fxe3+ 37.Bxe3 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "7"]
[White "Mecking, Henrique"]
[Black "Rossetto, Hector Decio"]
[Result "1/2-1/2"]
[ECO "C68"]
[EventDate "1969.03.22"]
[PlyCount "92"]

1.e4 Nc6 2.Nf3 e5 3.Bb5 a6 4.Bxc6 dxc6 5.O-O Bg4 6.h3 h5 7.Re1 Qf6 8.hxg4 
hxg4 9.Nxe5 Qxe5 10.Qxg4 Nf6 11.Qf3 Bd6 12.g3 O-O-O 13.d3 Rh5 14.Nd2 Rdh8 
15.Nc4 Qe6 16.Kf1 Ng4 17.Ke2 Nxf2 18.Nxd6+ cxd6 19.Kxf2 Rh2+ 20.Ke3 d5 21.
Rf1 Rxc2 22.Qf5 c5 23.Rf2 d4+ 24.Kf3 Qxf5+ 25.exf5 Rxf2+ 26.Kxf2 Rh5 27.g4
Rh1 28.b4 b6 29.bxc5 bxc5 30.Kf3 Kd7 31.Bb2 Rh3+ 32.Ke4 Kc6 33.Rd1 Re3+ 
34.Kf4 Re2 35.Bc1 Rxa2 36.Kf3 Ra1 37.Ke2 Kd5 38.Bf4 Ra2+ 39.Kf3 Ra3 40.g5 
c4 41.Ke2 Ra2+ 42.Kf3 Ra3 43.g6 fxg6 44.fxg6 Rxd3+ 45.Rxd3 cxd3 46.Bh6 Ke6
1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "7"]
[White "Najdorf, Miguel"]
[Black "Riego Prieto, Victorio"]
[Result "1-0"]
[ECO "E95"]
[EventDate "1969.03.22"]
[PlyCount "67"]

1.d4 g6 2.c4 Bg7 3.Nc3 Nf6 4.e4 d6 5.Be2 Nbd7 6.Nf3 O-O 7.O-O e5 8.Re1 c6 
9.Bf1 Re8 10.d5 c5 11.a3 Nf8 12.b4 b6 13.Rb1 Nh5 14.g3 f5 15.bxc5 dxc5 16.
Bg5 Qd7 17.exf5 gxf5 18.Nh4 Qf7 19.Nb5 Nf6 20.Nd6 Qd7 21.Nhxf5 Ng6 22.Bh3 
Qd8 23.Nxe8 Bxf5 24.Nxg7 Bxh3 25.Nh5 h6 26.Nxf6+ Kf7 27.Qh5 hxg5 28.Ne4 
Bf5 29.Nxg5+ Kg7 30.Qh7+ Kf6 31.f4 exf4 32.Ne4+ Bxe4 33.Rxe4 Qg8 34.Re6+ 
1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "7"]
[White "Quinteros, Miguel Angel"]
[Black "Rubinetti, Jorge Alberto"]
[Result "1/2-1/2"]
[ECO "A02"]
[EventDate "1969.03.22"]
[PlyCount "192"]

1.f4 c5 2.Nf3 g6 3.c3 Nf6 4.g3 Bg7 5.Bg2 O-O 6.O-O d6 7.d3 Nc6 8.a3 Rb8 9.
Kh1 b6 10.e4 e6 11.Qe2 Ba6 12.Nbd2 Nd7 13.Rg1 Qc7 14.b4 Bb7 15.Bb2 Rbe8 
16.d4 f5 17.e5 d5 18.Rab1 Nd8 19.a4 Bc6 20.Qd1 Nf7 21.Ba3 Rc8 22.bxc5 bxc5
23.dxc5 Rfe8 24.Nd4 Bf8 25.Nxc6 Qxc6 26.c4 Nxc5 27.cxd5 exd5 28.Bxc5 Bxc5 
29.Re1 Bb6 30.Qb3 Rcd8 31.Red1 Qe6 32.Nf3 d4 33.Qxe6 Rxe6 34.Rb4 Re7 35.
Bf1 Kf8 36.Bb5 Rc8 37.Rb2 Nd8 38.Nxd4 Ne6 39.Nxe6+ Rxe6 40.Bd7 Rd8 41.Rbd2
Re7 42.e6 Ba5 43.Rd5 Bb4 44.a5 Rg7 45.Rb5 Be7 46.Rdd5 Ra8 47.a6 Bd8 48.Rb7
Re7 49.Kg2 h5 50.Kf3 Bb6 51.h3 Rd8 52.g4 hxg4+ 53.hxg4 fxg4+ 54.Kxg4 Be3 
55.Kg5 Kg7 56.Rd3 Bc5 57.Rb5 Rh8 58.Kg4 Rh5 59.Rc3 Bd4 60.Rc4 Rxb5 61.Bxb5
Bb6 62.Bd7 Kf6 63.Rc8 Rh7 64.Kf3 Rh3+ 65.Ke4 Re3+ 66.Kd5 Rd3+ 67.Kc4 Rd4+ 
68.Kb5 Rd5+ 69.Kc4 Rf5 70.Rf8+ Ke7 71.Rg8 Rxf4+ 72.Kb5 Rf5+ 73.Kc6 Rc5+ 
74.Kb7 g5 75.Rg7+ Kd6 76.Bc8 Re5 77.Kb8 Be3 78.Rd7+ Kxe6 79.Rxa7+ Kf6 80.
Rd7 g4 81.a7 Bxa7+ 82.Rxa7 g3 83.Ra2 Rg5 84.Bb7 Ke5 85.Kc7 Rg7+ 86.Kb6 Kf4
87.Bg2 Rg5 88.Kc6 Ke3 89.Kd6 Rf5 90.Ke6 Rf2 91.Ra3+ Kf4 92.Ra4+ Ke3 93.Bd5
Rf8 94.Ra1 Kf2 95.Ke5 Re8+ 96.Kf4 g2 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "7"]
[White "Rocha, Antonio Cavilhas"]
[Black "Mendivil Salinas, Ismael"]
[Result "1-0"]
[ECO "B07"]
[EventDate "1969.03.22"]
[PlyCount "69"]

1.e4 g6 2.d4 d6 3.Nc3 Nf6 4.Bg5 Bg7 5.e5 dxe5 6.dxe5 Ng4 7.Qxd8+ Kxd8 8.
Rd1+ Bd7 9.Nd5 f6 10.exf6 exf6 11.Bf4 Re8+ 12.Be2 Ne5 13.h4 Nbc6 14.h5 g5 
15.h6 Bh8 16.Be3 Kc8 17.Nf3 Nxf3+ 18.gxf3 Ne7 19.Nxe7+ Rxe7 20.f4 gxf4 21.
Rg1 b6 22.Ba6+ Kd8 23.Bb7 fxe3 24.Bxa8 exf2+ 25.Kxf2 Kc8 26.Rg8+ Re8 27.
Rxe8+ Bxe8 28.Be4 Bg6 29.Bxg6 hxg6 30.Kf3 f5 31.Kf4 Bxb2 32.Kg5 Kb7 33.
Kxg6 f4 34.h7 Kc6 35.c3 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "7"]
[White "Schweber, Samuel"]
[Black "Rodriguez Vargas, Orestes"]
[Result "1-0"]
[ECO "B22"]
[EventDate "1969.03.22"]
[PlyCount "63"]

1.e4 c5 2.Nf3 Nc6 3.c3 Nf6 4.e5 Nd5 5.d4 d6 6.c4 Nb6 7.e6 fxe6 8.dxc5 dxc5
9.Qxd8+ Nxd8 10.Be3 Nd7 11.Nc3 g6 12.Nb5 Kf7 13.Ng5+ Kg8 14.Nc7 Rb8 15.
Ngxe6 Nxe6 16.Nxe6 Bg7 17.O-O-O Be5 18.Nxc5 Nxc5 19.Bxc5 Kf7 20.Bxa7 Ra8 
21.Bd4 Bf4+ 22.Kc2 Rd8 23.c5 Ra4 24.Bc3 Rxd1 25.Kxd1 Be6 26.Kc2 Rxa2 27.g3
Bc7 28.Bg2 Bf5+ 29.Kd2 Ra7 30.Re1 b6 31.c6 Ra2 32.Bd5+ 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "7"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Garcia Toledo, Pedro"]
[Result "1/2-1/2"]
[ECO "C00"]
[EventDate "1969.03.22"]
[PlyCount "23"]

1.e4 e6 2.b3 d5 3.Bb2 Nf6 4.d3 c5 5.Nd2 Nc6 6.f4 Be7 7.g4 e5 8.f5 h5 9.h3 
hxg4 10.Bg2 dxe4 11.dxe4 gxh3 12.Qf3 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "8"]
[White "Alvarez del Monte, Jose Luis"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "B43"]
[EventDate "1969.03.22"]
[PlyCount "60"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 b5 6.a3 Bb7 7.f4 Nf6 8.Bd3 d5 
9.e5 Ne4 10.Nce2 Qh4+ 11.g3 Qd8 12.c3 Nd7 13.Ng1 Bc5 14.Ngf3 O-O 15.Qe2 
Nb6 16.Ng5 Qc7 17.h4 h6 18.Nxe4 dxe4 19.Bxe4 Bxd4 20.cxd4 Rfd8 21.Qf3 Bxe4
22.Qxe4 Qc4 23.Be3 Qb3 24.Rh2 Nc4 25.Re2 Nxb2 26.Kf1 Nc4 27.g4 Rac8 28.Kf2
Nxe3 29.Qxe3 Rc3 30.Qe4 Rd3 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "8"]
[White "Canobra, Juvenal"]
[Black "Bronstein, Luis Marcos"]
[Result "0-1"]
[ECO "B35"]
[EventDate "1969.03.22"]
[PlyCount "81"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4 O-O 8.f3 
Qb6 9.Qd2 Nxe4 10.fxe4 Bxd4 11.Bxd4 Qxd4 12.Qxd4 Nxd4 13.O-O-O Ne6 14.Rhf1
Rb8 15.Nd5 Re8 16.Rf2 b5 17.Bb3 Nc5 18.Rdf1 Nxb3+ 19.axb3 f6 20.Rxf6 exf6 
21.Nxf6+ Kf7 22.Nxd7+ Ke7 23.Nxb8 Bb7 24.Na6 Bxa6 25.Kd2 Rf8 26.Ra1 Rf6 
27.c4 Rb6 28.c5 Re6 29.Kd3 Kd7 30.Kd4 Bb7 31.Rxa7 Kc7 32.e5 Ra6 33.Rxa6 
Bxa6 34.e6 Bb7 35.Ke5 Bxg2 36.b4 g5 37.Kf6 g4 38.Kf5 h5 39.Kg5 Bf3 40.Kf4 
Kd8 41.h3 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "8"]
[White "Garcia Toledo, Pedro"]
[Black "Mecking, Henrique"]
[Result "1/2-1/2"]
[ECO "B05"]
[EventDate "1969.03.22"]
[PlyCount "105"]

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4 5.Be2 Nc6 6.O-O e6 7.Re1 dxe5 8.Nxe5 
Bxe2 9.Qxe2 Nxd4 10.Qe4 Bc5 11.c3 Nc6 12.Nxc6 bxc6 13.c4 Ne7 14.Be3 Bxe3 
15.Qxe3 O-O 16.Nc3 Qb8 17.b3 Qb6 18.Rad1 Qxe3 19.Rxe3 Rfd8 20.Red3 Rxd3 
21.Rxd3 Kf8 22.f4 Ke8 23.Kf2 a5 24.g4 h6 25.Ke3 Nc8 26.Na4 Nb6 27.Nxb6 
cxb6 28.c5 bxc5 29.Rc3 a4 30.Rxc5 axb3 31.axb3 Kd7 32.h3 Kd6 33.Kd4 Ra1 
34.Rc3 c5+ 35.Ke4 Rd1 36.Rc4 Re1+ 37.Kf3 Rh1 38.Kg2 Rb1 39.Rc3 Kc6 40.Kf3 
f5 41.Re3 Kb5 42.Rc3 Kb4 43.Rc4+ Kb5 44.Rc3 Rd1 45.Re3 Rd6 46.g5 Kb4 47.g6
Ka3 48.Kg3 Rb6 49.Kh4 Rxb3 50.Rxe6 Rb7 51.Kh5 Kb4 52.h4 c4 53.Rb6+ 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "8"]
[White "Mendivil Salinas, Ismael"]
[Black "Garcia, Raimundo"]
[Result "0-1"]
[ECO "B34"]
[EventDate "1969.03.22"]
[PlyCount "179"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Qb6 5.Nb3 Nf6 6.Nc3 e6 7.Be3 Qc7 8.a3 
Be7 9.Be2 O-O 10.f4 Rd8 11.Bf3 d6 12.O-O a6 13.Na4 Nd7 14.Qe1 b5 15.Nc3 
Nb6 16.Rd1 Nc4 17.Bc1 Rb8 18.Qe2 Na7 19.Kh1 Bd7 20.f5 Bf6 21.Qd3 Nc6 22.
Be2 Be8 23.Qg3 Qe7 24.Nd2 N4e5 25.Nf3 Nxf3 26.Qxf3 Nd4 27.Qd3 Nxe2 28.Nxe2
d5 29.fxe6 dxe4 30.Qxe4 Qxe6 31.Qxe6 fxe6 32.Ng3 Bg6 33.c3 Rxd1 34.Rxd1 h5
35.Kg1 h4 36.Nf1 a5 37.Ne3 Be7 38.Ng4 Bh5 39.h3 Bc5+ 40.Kf1 Rf8+ 41.Ke1 
Rf5 42.Rd3 a4 43.Be3 Bxg4 44.Bxc5 Rxc5 45.hxg4 Rc4 46.Rd4 Rxd4 47.cxd4 Kf7
48.Kf2 Kf6 49.Kf3 Kg5 50.Ke4 Kxg4 51.Ke5 Kg3 52.Kxe6 Kxg2 53.d5 h3 54.d6 
h2 55.d7 h1=Q 56.d8=Q Qe1+ 57.Kf5 Qf2+ 58.Ke4 Qxb2 59.Qg5+ Kf1 60.Qf5+ Ke1
61.Qh3 Qe2+ 62.Kd5 Kd2 63.Kc6 Kc1 64.Qg3 Kb2 65.Qxg7+ Kxa3 66.Qa1+ Kb3 67.
Kb6 Qd3 68.Qg1 b4 69.Ka5 a3 70.Qg8+ Qc4 71.Qg3+ Qc3 72.Qg8+ Kb2 73.Qg2+ 
Ka1 74.Qf1+ Ka2 75.Qe2+ Qb2 76.Qc4+ b3 77.Ka4 Qc2 78.Qd5 Qc3 79.Qe6 Qd4+ 
80.Kb5 Kb1 81.Qe1+ Kc2 82.Qe2+ Qd2 83.Qc4+ Kb2 84.Ka4 Qd1 85.Qc5 a2 86.
Qe5+ Kb1 87.Qe4+ Ka1 88.Qe5+ b2+ 89.Ka3 Qd3+ 90.Ka4 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "8"]
[White "Panno, Oscar"]
[Black "Schweber, Samuel"]
[Result "1-0"]
[ECO "B27"]
[EventDate "1969.03.22"]
[PlyCount "77"]

1.d4 c5 2.d5 d6 3.e4 g6 4.Nf3 Bg7 5.Be2 Bg4 6.Nfd2 Bxe2 7.Qxe2 e5 8.Qb5+ 
Qd7 9.Nc4 Ke7 10.Nc3 Nf6 11.Bg5 h6 12.Bxf6+ Bxf6 13.Qb3 Rd8 14.O-O Na6 15.
f4 exf4 16.Rxf4 Bd4+ 17.Kh1 f6 18.Raf1 Rf8 19.Nb5 Be5 20.R4f3 b6 21.a4 Nc7
22.Nxc7 Qxc7 23.Qe3 g5 24.Rf5 Rf7 25.Qh3 Raf8 26.Qxh6 Qd7 27.b3 Bd4 28.Qh3
Kd8 29.c3 Be5 30.Qf3 Ke7 31.Qd3 Rh8 32.g3 Rfh7 33.R1f2 Qe8 34.Nxe5 dxe5 
35.d6+ Kd8 36.Qd5 Qg6 37.Kg1 g4 38.Rxf6 Qg5 39.Qa8+ 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "8"]
[White "Riego Prieto, Victorio"]
[Black "Quinteros, Miguel Angel"]
[Result "0-1"]
[ECO "B06"]
[EventDate "1969.03.22"]
[PlyCount "74"]

1.e4 d6 2.d4 g6 3.f4 Bg7 4.Nf3 Nf6 5.Bd3 O-O 6.O-O Nc6 7.c3 Bg4 8.Nbd2 e5 
9.fxe5 dxe5 10.d5 Ne7 11.Qc2 Ne8 12.c4 c5 13.Rf2 Nd6 14.Nf1 f5 15.h3 fxe4 
16.Bxe4 Bxf3 17.Rxf3 Rxf3 18.Bxf3 Nef5 19.Be3 Nxe3 20.Nxe3 e4 21.Bg4 Bd4 
22.Re1 Qh4 23.Re2 Rf8 24.b3 Qg3 25.Qc1 Rf3 26.Bxf3 exf3 27.Rf2 Nf5 28.Rxf3
Qxf3 29.gxf3 Bxe3+ 30.Qxe3 Nxe3 31.Kf2 Nf5 32.Ke2 Kf7 33.Kd3 Kf6 34.b4 b6 
35.bxc5 bxc5 36.Kc3 Ke5 37.Kb3 Kd4 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "8"]
[White "Rodriguez Vargas, Orestes"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "1-0"]
[ECO "D37"]
[EventDate "1969.03.22"]
[PlyCount "75"]

1.d4 d5 2.c4 e6 3.Nf3 Nd7 4.Nc3 Ngf6 5.e3 Be7 6.Bd3 dxc4 7.Bxc4 a6 8.a4 c5
9.O-O Qc7 10.Qe2 O-O 11.Bd2 Rd8 12.Rac1 b6 13.Ba2 Qb8 14.Rfd1 b5 15.e4 b4 
16.e5 bxc3 17.exf6 Bxf6 18.Bxc3 cxd4 19.Nxd4 Ne5 20.Nf5 Bd7 21.Ng3 Ng6 22.
Bxf6 gxf6 23.Nh5 Bxa4 24.Rxd8+ Qxd8 25.Qe3 f5 26.h3 Bd1 27.f3 Rb8 28.Kh1 
f4 29.Qc3 e5 30.Qc4 Nh8 31.Qc6 Qg5 32.Qc8+ Qd8 33.Qg4+ Ng6 34.Qf5 Nh8 35.
Qxe5 Qf8 36.Nf6+ Kg7 37.Nd7+ f6 38.Qxb8 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "8"]
[White "Rubinetti, Jorge Alberto"]
[Black "Camara, Helder"]
[Result "1/2-1/2"]
[ECO "A05"]
[EventDate "1969.03.22"]
[PlyCount "100"]

1.Nf3 Nf6 2.g3 g6 3.b4 Bg7 4.Bb2 c6 5.Bg2 a5 6.a3 axb4 7.axb4 Rxa1 8.Bxa1 
Qb6 9.c3 Qa6 10.Bb2 Qa2 11.Qc1 Nd5 12.Ba3 Nb6 13.d3 Qe6 14.Qc2 d6 15.O-O 
O-O 16.c4 N6d7 17.Nc3 Nf6 18.b5 c5 19.Ra1 Nbd7 20.Bb2 Qf5 21.Ra7 Qh5 22.e3
Nb6 23.Na4 Nxa4 24.Rxa4 e5 25.Ra8 Bg4 26.Rxf8+ Bxf8 27.Nd2 b6 28.Ne4 Nxe4 
29.Bxe4 Bd1 30.Qd2 Bh6 31.Kg2 Bg4 32.f3 Qh3+ 33.Kg1 Be6 34.f4 Bg7 35.Qg2 
Qh5 36.Bf3 Bg4 37.Bd5 Be2 38.Qf2 Bxd3 39.fxe5 Qf5 40.Qxf5 Bxf5 41.e4 Bc8 
42.Bc1 Bxe5 43.Bg5 Bc3 44.Bd8 Ba5 45.Be7 Kg7 46.Kf2 Be6 47.Kf3 h5 48.Ke3 
Bg4 49.Kd3 Bh3 50.Bxd6 Kf6 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "8"]
[White "Silva Sanchez, Carlos"]
[Black "Rocha, Antonio Cavilhas"]
[Result "1/2-1/2"]
[ECO "A23"]
[EventDate "1969.03.22"]
[PlyCount "28"]

1.c4 e5 2.g3 Nf6 3.Bg2 c6 4.Nf3 d6 5.Nc3 g6 6.d4 Qc7 7.c5 Nbd7 8.O-O dxc5 
9.dxe5 Nxe5 10.Nxe5 Qxe5 11.Bf4 Qh5 12.Qa4 Be7 13.Bxc6+ Kf8 14.Bg2 g5 
1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "9"]
[White "Bronstein, Luis Marcos"]
[Black "Rubinetti, Jorge Alberto"]
[Result "0-1"]
[ECO "A08"]
[EventDate "1969.03.22"]
[PlyCount "80"]

1.e4 c5 2.Nf3 e6 3.d3 Nc6 4.g3 d5 5.Nbd2 Nf6 6.Bg2 Be7 7.O-O O-O 8.Re1 b5 
9.e5 Nd7 10.Nf1 a5 11.h4 a4 12.Bf4 a3 13.b3 b4 14.Ne3 Ra6 15.Bh3 Nd4 16.
Nxd4 cxd4 17.Ng4 Rc6 18.Rc1 Ba6 19.Qd2 Rc3 20.Bg5 Bxg5 21.hxg5 Qc7 22.Qf4 
Qc5 23.Kh2 Rc8 24.Bf1 Nf8 25.Kg1 Ng6 26.Qd2 Rxc2 27.Rxc2 Qxc2 28.Qxb4 Qc3 
29.Qxc3 Rxc3 30.Ra1 Rc2 31.f4 Ne7 32.Nh2 Nc6 33.Nf3 Bb5 34.g4 g6 35.Ne1 
Rb2 36.Nf3 Kf8 37.Kh1 Rf2 38.Bg2 Bxd3 39.Nxd4 Nxd4 40.Rd1 Nc2 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "9"]
[White "Camara, Helder"]
[Black "Riego Prieto, Victorio"]
[Result "1-0"]
[ECO "B07"]
[EventDate "1969.03.22"]
[PlyCount "21"]

1.e4 d6 2.d4 g6 3.Be3 Bg7 4.f3 c5 5.c3 Qb6 6.Qd2 Na6 7.Bxa6 cxd4 8.Bxd4 
Bxd4 9.Qxd4 Qxd4 10.Bb5+ Kf8 11.cxd4 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "9"]
[White "Garcia, Raimundo"]
[Black "Silva Sanchez, Carlos"]
[Result "1-0"]
[ECO "E99"]
[EventDate "1969.03.22"]
[PlyCount "81"]

1.c4 Nf6 2.Nf3 g6 3.Nc3 Bg7 4.e4 d6 5.d4 O-O 6.Be2 e5 7.O-O Nc6 8.d5 Ne7 
9.Ne1 Nd7 10.Nd3 f5 11.Bd2 Nf6 12.f3 f4 13.c5 Ne8 14.Rc1 Rf7 15.a4 g5 16.
a5 Bf8 17.Nb5 Ng6 18.cxd6 cxd6 19.Nf2 h5 20.h3 Rg7 21.Rc3 Bd7 22.b4 Nh8 
23.Qc2 Nf7 24.Nc7 Ba4 25.Qxa4 Nxc7 26.Rfc1 Nh6 27.Qc2 Ne8 28.Rc8 Rxc8 29.
Qxc8 Qxc8 30.Rxc8 Nf6 31.Kf1 g4 32.b5 gxh3 33.Nxh3 Nh7 34.Bb4 Rd7 35.b6 
axb6 36.axb6 Nf7 37.Rc7 Nf6 38.Bb5 Re7 39.Nf2 Kg7 40.Nd3 Kg6 41.Nb2 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "9"]
[White "Mecking, Henrique"]
[Black "Rodriguez Vargas, Orestes"]
[Result "1/2-1/2"]
[ECO "D32"]
[EventDate "1969.03.22"]
[PlyCount "81"]

1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 cxd4 5.Qxd4 Nc6 6.Qd1 exd5 7.Qxd5 Bd7 8.
Nf3 Nf6 9.Qd1 Bc5 10.e3 Qe7 11.Be2 O-O-O 12.O-O g5 13.b4 Bxb4 14.Qb3 Be6 
15.Bc4 g4 16.Nd4 Nxd4 17.exd4 Rxd4 18.Bxe6+ Qxe6 19.Nb5 Qxb3 20.axb3 Rd5 
21.Nxa7+ Kd7 22.Bb2 Be7 23.Rad1 Rxd1 24.Rxd1+ Ke6 25.Nb5 Rd8 26.Nd4+ Kd7 
27.Nf5+ Ke8 28.Re1 Nd5 29.Ba3 Rd7 30.Kf1 Kd8 31.Nxe7 Nxe7 32.Bc5 Nd5 33.
Re4 h5 34.f3 gxf3 35.gxf3 Kc7 36.Bf2 f6 37.Rh4 Rh7 38.Ke2 Kd6 39.Kd3 Ke5 
40.Re4+ Kf5 41.Kc4 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "9"]
[White "Najdorf, Miguel"]
[Black "Mendivil Salinas, Ismael"]
[Result "1-0"]
[ECO "E73"]
[EventDate "1969.03.22"]
[PlyCount "65"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 h6 7.Be3 Nbd7 8.h3 e5 
9.d5 Nc5 10.Qc2 Nfd7 11.b4 Na6 12.a3 f5 13.Bd3 Nf6 14.f3 Nh5 15.Nge2 Qh4+ 
16.Bf2 Qg5 17.Rg1 Nf4 18.Nxf4 exf4 19.Rc1 Bd7 20.Kd2 Rae8 21.h4 Qd8 22.h5 
fxe4 23.Nxe4 g5 24.c5 dxc5 25.b5 Nb8 26.Qxc5 Bf5 27.Rgd1 Be5 28.Qc4 Kh8 
29.Nc5 Bc8 30.Re1 Bg7 31.Ne6 Bxe6 32.dxe6 Qf6 33.Qe4 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "9"]
[White "Quinteros, Miguel Angel"]
[Black "Alvarez del Monte, Jose Luis"]
[Result "1-0"]
[ECO "E69"]
[EventDate "1969.03.22"]
[PlyCount "113"]

1.c4 Nf6 2.g3 g6 3.Bg2 Bg7 4.Nc3 O-O 5.d4 d6 6.Nf3 Nbd7 7.O-O e5 8.e4 Re8 
9.h3 exd4 10.Nxd4 Nc5 11.Re1 a5 12.b3 c6 13.Bf4 Qe7 14.Qd2 Nfd7 15.Bg5 Qf8
16.Rad1 Ne5 17.Qc2 Bd7 18.Be3 f6 19.f4 Nf7 20.Qf2 Rad8 21.Nde2 b6 22.Nd4 
f5 23.exf5 gxf5 24.Qc2 Rc8 25.Bf2 Rxe1+ 26.Rxe1 Re8 27.Rxe8 Qxe8 28.a3 Nh6
29.b4 axb4 30.axb4 Ne6 31.Nde2 Qb8 32.b5 cxb5 33.Nxb5 Nc5 34.Qd1 Nf7 35.
Bd5 Be6 36.Bxe6 Nxe6 37.Qd5 Nc5 38.Qxf5 Qe8 39.Nec3 Qa8 40.Kh2 Qf3 41.Qc8+
Bf8 42.Bxc5 bxc5 43.Qg4+ Qxg4 44.hxg4 Nd8 45.Ne4 Nb7 46.g5 Kf7 47.f5 Be7 
48.Kh3 Ke8 49.Kg4 Kd7 50.Kh5 Na5 51.Na3 Bf8 52.Nf6+ Ke7 53.Nxh7 Nc6 54.f6+
Kf7 55.g6+ Kg8 56.Nxf8 Kxf8 57.Kh6 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "9"]
[White "Rossetto, Hector Decio"]
[Black "Garcia Toledo, Pedro"]
[Result "1-0"]
[ECO "D02"]
[EventDate "1969.03.22"]
[PlyCount "33"]

1.d4 d5 2.Nf3 Nf6 3.g3 c5 4.Bg2 Nc6 5.O-O e6 6.c3 b6 7.Bg5 Be7 8.Nbd2 Bb7 
9.Qb3 cxd4 10.Nxd4 O-O 11.Nxc6 Bxc6 12.Rfd1 Rc8 13.a4 Ne4 14.Bxe7 Nxd2 15.
Qb4 a5 16.Qh4 Qd7 17.Rxd2 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "9"]
[White "Schweber, Samuel"]
[Black "Canobra, Juvenal"]
[Result "1-0"]
[ECO "A62"]
[EventDate "1969.03.22"]
[PlyCount "177"]

1.d4 Nf6 2.c4 e6 3.g3 c5 4.d5 exd5 5.cxd5 d6 6.Nc3 g6 7.Nf3 Bg7 8.Bg2 O-O 
9.O-O Na6 10.Nd2 Nc7 11.a4 b6 12.Nc4 Qe7 13.Bf4 Rd8 14.e4 Ng4 15.Nb5 Nxb5 
16.axb5 Ne5 17.Bxe5 Bxe5 18.Nxb6 Rb8 19.Nc4 Rxb5 20.Ra2 Bd4 21.Qd3 Rb4 22.
Kh1 f5 23.Na5 fxe4 24.Bxe4 Bd7 25.b3 Bb5 26.Nc4 Rf8 27.Re2 Qf6 28.h4 Bd7 
29.Kg2 Rb7 30.f4 Bg4 31.Bf3 Bf5 32.Qd1 Rfb8 33.Na5 Rb5 34.Nc6 R8b7 35.Re8+
Kg7 36.Rfe1 Rxb3 37.R1e7+ Kh6 38.Rxb7 Rxb7 39.g4 Rb2+ 40.Re2 Bxg4 41.Bxg4 
Qxf4 42.Rxb2 Bxb2 43.Qf3 Qd2+ 44.Qe2 Qf4 45.Kh3 Qc1 46.Qf3 Kg7 47.Nd8 Qc3 
48.Nb7 h5 49.Qxc3+ Bxc3 50.Be2 Be5 51.Na5 Kf6 52.Nc6 Bf4 53.Bc4 g5 54.
hxg5+ Kxg5 55.Nxa7 Be5 56.Nc6 Bf6 57.Kg3 Kf5 58.Bd3+ Kg5 59.Kf3 Bc3 60.Bf1
Bd2 61.Ke4 Bf4 62.Na5 Bh2 63.Nc4 Kf6 64.Nd2 Bg3 65.Be2 Kg5 66.Nf3+ Kf6 67.
Bb5 h4 68.Bf1 Kg6 69.Bh3 Kf6 70.Ke3 Kg6 71.Nd2 Bh2 72.Ne4 Be5 73.Kd3 Kf7 
74.Bf5 Ke7 75.Be6 Kd8 76.Nd2 Kc7 77.Ke4 Bh2 78.Nc4 Bg3 79.Bh3 Kd8 80.Kf5 
Ke7 81.Kg6 Be1 82.Bf1 Bc3 83.Ne3 Be1 84.Nf5+ Kd7 85.Kg5 Kc7 86.Nxh4 Bxh4+ 
87.Kxh4 Kb6 88.Kg5 Ka5 89.Kf6 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "9"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "B88"]
[EventDate "1969.03.22"]
[PlyCount "46"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 Bd7 7.O-O a6 8.Bb3 
e6 9.Be3 Be7 10.f4 O-O 11.Qf3 Na5 12.f5 Nxb3 13.cxb3 Qa5 14.g4 e5 15.Nde2 
d5 16.Nxd5 Nxd5 17.exd5 Bb5 18.Rf2 e4 19.Qxe4 Rfe8 20.Qf3 Bxe2 21.Rxe2 Bc5
22.Rae1 Rxe3 23.Rxe3 Qxe1+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "10"]
[White "Alvarez del Monte, Jose Luis"]
[Black "Camara, Helder"]
[Result "0-1"]
[ECO "A40"]
[EventDate "1969.03.22"]
[PlyCount "78"]

1.e4 g6 2.d4 Bg7 3.c4 c5 4.d5 e5 5.Nc3 d6 6.Be3 Na6 7.Bd3 Nc7 8.g4 Bh6 9.
Bxh6 Nxh6 10.h3 f6 11.Nge2 Bd7 12.Ng3 Qe7 13.a3 b6 14.Qe2 Qg7 15.Nf1 Ng8 
16.Ne3 h5 17.O-O-O h4 18.Nb5 Nxb5 19.cxb5 Kd8 20.Kb1 Ne7 21.Qc2 g5 22.Nf5 
Nxf5 23.exf5 Ke7 24.Qe2 Rhb8 25.Kc2 a6 26.a4 axb5 27.axb5 Ra5 28.Ra1 Rba8 
29.Rxa5 Rxa5 30.Rb1 Qg8 31.Bc4 Qe8 32.Qf1 Qa8 33.Qd3 Kd8 34.Qe2 Kc7 35.Qf1
Kb7 36.f3 Qe8 37.b4 cxb4 38.Rxb4 Qa8 39.Qd3 Ra3 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "10"]
[White "Canobra, Juvenal"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "1/2-1/2"]
[ECO "C86"]
[EventDate "1969.03.22"]
[PlyCount "83"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Qe2 d6 7.c3 O-O 8.d4 b5 
9.Bb3 Bg4 10.Rd1 Qd7 11.dxe5 Nxe5 12.Nxe5 Bxe2 13.Nxd7 Nxd7 14.Re1 Bd3 15.
Bd5 Rac8 16.a4 c6 17.Bb3 Nc5 18.Bd1 bxa4 19.Be3 Nxe4 20.Bxa4 d5 21.Na3 f5 
22.f3 Nc5 23.Bc2 Rfe8 24.b4 Bxc2 25.Nxc2 Nd3 26.Red1 Nb2 27.Rdb1 Nc4 28.
Rxa6 Nxe3 29.Nxe3 g6 30.Kf2 f4 31.Nc2 Bf6 32.Nd4 Bxd4+ 33.cxd4 Re3 34.Rc1 
Rb3 35.Raxc6 Rxc6 36.Rxc6 Rxb4 37.Ke2 Rxd4 38.Rd6 g5 39.Rd7 h6 40.g3 fxg3 
41.hxg3 h5 42.Ke3 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "10"]
[White "Mendivil Salinas, Ismael"]
[Black "Quinteros, Miguel Angel"]
[Result "0-1"]
[ECO "A41"]
[EventDate "1969.03.22"]
[PlyCount "72"]

1.e4 d6 2.d4 g6 3.c4 Bg7 4.Nf3 Nd7 5.Be2 e5 6.d5 Ne7 7.Nc3 O-O 8.O-O f5 9.
Ne1 Nf6 10.exf5 gxf5 11.f4 e4 12.Be3 c5 13.a3 Ne8 14.Qd2 Kh8 15.b4 b6 16.
Rb1 Rg8 17.Nc2 Ng6 18.bxc5 dxc5 19.a4 Nh4 20.g3 Nf3+ 21.Bxf3 exf3 22.Rxf3 
Nd6 23.Qd3 Re8 24.Rff1 Ba6 25.Nb5 Re4 26.Bf2 Rxc4 27.Qb3 Bxb5 28.axb5 Rc3 
29.Qa2 Qd7 30.Ne3 Re8 31.Nd1 Rd3 32.Qc2 c4 33.Nb2 Rxd5 34.Nxc4 Rc8 35.Rb4 
Rxb5 36.Rfb1 Rxc4 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "10"]
[White "Panno, Oscar"]
[Black "Mecking, Henrique"]
[Result "1-0"]
[ECO "A56"]
[EventDate "1969.03.22"]
[PlyCount "105"]

1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.Be2 O-O 7.Nf3 Ne8 8.h4 Na6 9.
Be3 Nac7 10.a4 Na6 11.g3 Nb4 12.Rc1 a6 13.Kf1 Qd7 14.Kg2 Nf6 15.Nh2 h5 16.
Nf3 Ng4 17.Bd2 f5 18.Ng5 Bxg5 19.hxg5 f4 20.f3 Qf7 21.fxg4 f3+ 22.Bxf3 
hxg4 23.Bxg4 Qf2+ 24.Kh3 Rf3 25.Ne2 Bxg4+ 26.Kxg4 Nd3 27.g6 Kf8 28.Rf1 Rf6
29.Rxf2 Nxf2+ 30.Kg5 Nxd1 31.Rxd1 Ke7 32.Kg4 Kd7 33.Ng1 Rh8 34.Nf3 b5 35.
axb5 axb5 36.cxb5 Rb8 37.Bc3 Rxg6+ 38.Ng5 Rxb5 39.Rf1 Ke8 40.Rh1 Ke7 41.
Rh8 Rb7 42.Kh5 Rf6 43.Rg8 Rh6+ 44.Kg4 Rg6 45.Ra8 c4 46.Ra1 Rb8 47.Ra7+ Ke8
48.Rc7 Kd8 49.Rxc4 Ra8 50.Rb4 Kc7 51.Rc4+ Kb6 52.Rc6+ Kb5 53.Rc7 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "10"]
[White "Riego Prieto, Victorio"]
[Black "Bronstein, Luis Marcos"]
[Result "1-0"]
[ECO "C96"]
[EventDate "1969.03.22"]
[PlyCount "109"]

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 Na5 10.Bc2 c5 11.d4 Nd7 12.Nbd2 cxd4 13.cxd4 Nc6 14.Nf1 Nxd4 15.Nxd4 
exd4 16.Qxd4 Ne5 17.Qd1 Bf6 18.Ne3 Be6 19.Bb3 Rc8 20.Bd5 Nc4 21.Re2 Be5 
22.a4 Qf6 23.Rb1 Nxe3 24.Bxe3 Bxd5 25.Qxd5 bxa4 26.Qa2 Rc6 27.Qxa4 Rfc8 
28.b4 h6 29.Qd1 Rc4 30.Qd5 Qg6 31.f4 Rxe4 32.Rf1 Re8 33.fxe5 R8xe5 34.Qd2 
d5 35.Rfe1 Qc6 36.Kf1 Qf6+ 37.Bf2 Qe7 38.Rxe4 dxe4 39.Bc5 Qe6 40.Kg1 f5 
41.Rd1 Qb3 42.Qd8+ Kh7 43.Qd4 e3 44.Qxe5 Qxd1+ 45.Kh2 e2 46.Bf8 Qd7 47.
Qxe2 Qc7+ 48.Kg1 Qc1+ 49.Qf1 Qe3+ 50.Kh1 f4 51.Bc5 Qe4 52.Qf3 Qe1+ 53.Kh2 
g5 54.Qd3+ Kg8 55.Qg6+ 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "10"]
[White "Rocha, Antonio Cavilhas"]
[Black "Garcia, Raimundo"]
[Result "1/2-1/2"]
[ECO "B34"]
[EventDate "1969.03.22"]
[PlyCount "127"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Qb6 5.Nb3 Nf6 6.Nc3 e6 7.a3 Qc7 8.f4 d6
9.Be3 a6 10.Bd3 b5 11.O-O Bb7 12.Qe2 Be7 13.Nd4 O-O 14.f5 e5 15.Nxc6 Bxc6 
16.Bg5 Rfe8 17.Bxf6 Bxf6 18.Kh1 Rab8 19.Rab1 Qb6 20.Qf3 a5 21.Rfe1 b4 22.
axb4 axb4 23.Nd5 Bxd5 24.exd5 Qc5 25.b3 Rec8 26.Qe4 Ra8 27.g3 Ra5 28.Bc4 
Rca8 29.Qe3 Qxe3 30.Rxe3 Bg5 31.Re2 Bd8 32.Bd3 Bb6 33.Be4 Bd4 34.Kg2 Rc8 
35.Rf1 Ra1 36.Rxa1 Bxa1 37.Re1 Bd4 38.Rf1 f6 39.h4 Kf7 40.h5 h6 41.Rf3 Ke7
42.Kf1 Kd7 43.Ke2 Kc7 44.Rf1 Kb6 45.Rf3 Kc5 46.Kd3 Kb6 47.Ke2 Ra8 48.Rf1 
Ra5 49.Kd3 Ra8 50.Ke2 Ra7 51.Kd3 Ra5 52.Ke2 Bb2 53.Kd3 Rc5 54.Ke2 Bd4 55.
Rf3 Ra5 56.Rf1 Kc5 57.Kd3 Bb2 58.Rb1 Bc3 59.Rd1 Ra8 60.Rh1 Kb5 61.Rd1 Kc5 
62.Rf1 Ra7 63.Ke2 Rc7 64.Rf4 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "10"]
[White "Rodriguez Vargas, Orestes"]
[Black "Rossetto, Hector Decio"]
[Result "1/2-1/2"]
[ECO "C81"]
[EventDate "1969.03.22"]
[PlyCount "48"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.dxe5 
Be6 9.Qe2 Bc5 10.Be3 Qe7 11.a4 b4 12.Rd1 Bxe3 13.Qxe3 Rd8 14.Nbd2 Nc5 15.
Nd4 Na5 16.c3 Ncb7 17.Qg3 g6 18.N2f3 bxc3 19.bxc3 Nxb3 20.Nxb3 c5 21.Nc1 
Na5 22.Nd3 O-O 23.Nf4 f6 24.Re1 Rde8 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "10"]
[White "Rubinetti, Jorge Alberto"]
[Black "Schweber, Samuel"]
[Result "1/2-1/2"]
[ECO "A13"]
[EventDate "1969.03.22"]
[PlyCount "117"]

1.Nf3 d5 2.c4 e6 3.g3 Be7 4.Bg2 c6 5.Qc2 f5 6.O-O Nf6 7.d3 O-O 8.b3 Qe8 9.
Bb2 Qh5 10.Nbd2 Nbd7 11.Rfe1 Bc5 12.e3 Bd6 13.cxd5 exd5 14.a3 Ng4 15.b4 a6
16.Bd4 Nde5 17.Qc3 Nxf3+ 18.Nxf3 Qh6 19.Bc5 Re8 20.Bxd6 Qxd6 21.Rab1 Bd7 
22.h3 Ne5 23.Nd4 Re7 24.f4 Nf7 25.Qc5 Rae8 26.Qxd6 Nxd6 27.Kf2 Nb5 28.Nc2 
Kf7 29.Ra1 Ra8 30.a4 Nc7 31.Reb1 Ke6 32.Nd4+ Kd6 33.a5 Rb8 34.Nb3 Ne6 35.
h4 b6 36.axb6 Rxb6 37.Nc5 Bc8 38.Bf1 d4 39.e4 Nxc5 40.e5+ Ke6 41.bxc5 Rxb1
42.Rxb1 Rb7 43.Rxb7 Bxb7 44.Bg2 a5 45.Ke2 Kd7 46.Kd2 Ba6 47.Bf3 a4 48.Kc2 
Bb5 49.g4 a3 50.Kb3 Bxd3 51.Kxa3 Bf1 52.gxf5 d3 53.e6+ Ke7 54.Bxc6 d2 55.
Bf3 Bd3 56.Kb2 Bxf5 57.Kc3 Be4 58.Bg4 h5 59.Bxh5 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "10"]
[White "Silva Sanchez, Carlos"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "B23"]
[EventDate "1969.03.22"]
[PlyCount "56"]

1.e4 c5 2.Nc3 Nc6 3.f4 e6 4.Nf3 d5 5.Bb5 a6 6.Bxc6+ bxc6 7.d3 Nf6 8.O-O 
Be7 9.Qe1 O-O 10.Bd2 a5 11.Ne5 Qc7 12.b3 Ba6 13.Rf3 c4 14.bxc4 dxc4 15.
Nxc4 Bxc4 16.dxc4 Nd7 17.Na4 Bb4 18.Rb1 e5 19.f5 Bxd2 20.Qxd2 Nf6 21.Re1 
Rab8 22.a3 Rfd8 23.Rd3 Rxd3 24.cxd3 Rb3 25.Qc2 Rxa3 26.Rb1 h6 27.Nb6 Qd8 
28.c5 Qd4+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "11"]
[White "Bronstein, Luis Marcos"]
[Black "Alvarez del Monte, Jose Luis"]
[Result "1-0"]
[ECO "D38"]
[EventDate "1969.03.22"]
[PlyCount "55"]

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Bb4 5.cxd5 exd5 6.Qa4+ Nc6 7.Bd2 O-O 8.e3 
a6 9.Bd3 Bd7 10.Qb3 Bd6 11.Nxd5 Nxd5 12.Qxd5 Nb4 13.Bxb4 Bxb4+ 14.Ke2 c6 
15.Qh5 g6 16.Qh6 Be7 17.Rhc1 Be6 18.Kf1 c5 19.Kg1 Bg4 20.Qf4 h5 21.h3 Be6 
22.Bc4 Bd6 23.Qh6 Bxc4 24.Rxc4 Qf6 25.dxc5 Rfc8 26.Rac1 Bf8 27.Qf4 Qxb2 
28.Ne5 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "11"]
[White "Camara, Helder"]
[Black "Mendivil Salinas, Ismael"]
[Result "1-0"]
[ECO "B07"]
[EventDate "1969.03.22"]
[PlyCount "53"]

1.e4 g6 2.d4 d6 3.Be3 Bg7 4.f3 Nf6 5.Nc3 Nbd7 6.Bc4 O-O 7.Nge2 c6 8.a4 e5 
9.dxe5 Nxe5 10.Bb3 Be6 11.O-O Nc4 12.Bxc4 Bxc4 13.b3 Ba6 14.Re1 Re8 15.Bd4
Qa5 16.Nf4 c5 17.Bxf6 Bxf6 18.Ncd5 Bd4+ 19.Kh1 Qd8 20.c4 Bxa1 21.Qxa1 Re5 
22.Ne3 Qf6 23.Nfd5 Qd8 24.Ng4 Qa5 25.f4 Rxd5 26.Nh6+ Kf8 27.exd5 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "11"]
[White "Garcia Toledo, Pedro"]
[Black "Rodriguez Vargas, Orestes"]
[Result "0-1"]
[ECO "B06"]
[EventDate "1969.03.22"]
[PlyCount "88"]

1.d4 g6 2.e4 Bg7 3.g3 d6 4.Bg2 e5 5.Ne2 Ne7 6.O-O O-O 7.Be3 Bg4 8.f3 Bc8 
9.Nbc3 c6 10.a4 Nd7 11.Qd2 d5 12.Rad1 c5 13.Nxd5 Nxd5 14.exd5 exd4 15.Bg5 
Nf6 16.c3 Qxd5 17.cxd4 Re8 18.Nc3 Qxd4+ 19.Qxd4 cxd4 20.Rxd4 Be6 21.Kf2 
Nd5 22.Rxd5 Bxc3 23.Rd6 Bb4 24.Rxe6 Rxe6 25.Rc1 Rae8 26.Bf1 Rc6 27.Rxc6 
bxc6 28.Bc4 Kg7 29.b3 Bc5+ 30.Kg2 Be3 31.h4 h6 32.Bxe3 Rxe3 33.Kf2 Rc3 34.
g4 f6 35.Kg2 g5 36.h5 Kf8 37.a5 Ke7 38.Kf2 Kd6 39.a6 Ke5 40.Kg3 Rxc4 41.
bxc4 Kd4 42.f4 Kxc4 43.fxg5 fxg5 44.Kf3 Kd3 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "11"]
[White "Mecking, Henrique"]
[Black "Canobra, Juvenal"]
[Result "1-0"]
[ECO "A81"]
[EventDate "1969.03.22"]
[PlyCount "63"]

1.d4 f5 2.g3 Nf6 3.Bg2 g6 4.Nc3 Bg7 5.Bg5 c6 6.Qd2 h6 7.Bxf6 Bxf6 8.e4 d6 
9.O-O-O Qa5 10.Kb1 fxe4 11.Bxe4 Bf5 12.Qd3 O-O 13.Nge2 Bg7 14.Nf4 g5 15.
Ng6 Bxg6 16.Bxg6 e5 17.d5 cxd5 18.Nxd5 Nc6 19.f3 Nd4 20.Ne7+ Kh8 21.Be4 
Rf6 22.Ng6+ Rxg6 23.Bxg6 Rc8 24.Qe3 Nb5 25.Rd3 e4 26.Bxe4 Nc3+ 27.Rxc3 
Rxc3 28.bxc3 Qa3 29.Bd3 Bxc3 30.Qe8+ Kg7 31.Qe7+ Kg8 32.Bc4+ 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "11"]
[White "Najdorf, Miguel"]
[Black "Rocha, Antonio Cavilhas"]
[Result "1-0"]
[ECO "E55"]
[EventDate "1969.03.22"]
[PlyCount "119"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 c5 6.Nf3 d5 7.O-O dxc4 8.Bxc4 
Nbd7 9.Qe2 a6 10.a3 Ba5 11.a4 Qe7 12.Bd2 Bc7 13.dxc5 Qxc5 14.Rfd1 b6 15.e4
Qh5 16.h3 Bb7 17.Bd3 Ne5 18.Nxe5 Qxe2 19.Bxe2 Bxe5 20.f3 Bd4+ 21.Kf1 Rfd8 
22.Be1 Kf8 23.Bf2 Bxf2 24.Kxf2 e5 25.Bc4 Ke7 26.Ke3 Rac8 27.Rxd8 Rxd8 28.
g4 g5 29.h4 h6 30.h5 a5 31.Rc1 Rc8 32.Bb5 Rc5 33.Kd3 Bc8 34.Rb1 Be6 35.b4 
axb4 36.Rxb4 Kd6 37.Rb1 Ng8 38.Nd1 Ne7 39.Ne3 Kc7 40.Bc4 Bxc4+ 41.Nxc4 Nc8
42.Ra1 Kd7 43.Ra2 f6 44.Ra1 Kc7 45.Rb1 Kc6 46.Ra1 Kb7 47.a5 bxa5 48.Nxa5+ 
Kb6 49.Nc4+ Kb7 50.Ra3 Rc7 51.Ra5 Rc6 52.Ne3 Ne7 53.Nd5 Nc8 54.Rb5+ Ka7 
55.Rb4 Nb6 56.Ne7 Rc7 57.Ng8 Rh7 58.Ke2 Nd7 59.Rb2 Ka8 60.Rd2 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "11"]
[White "Quinteros, Miguel Angel"]
[Black "Silva Sanchez, Carlos"]
[Result "1-0"]
[ECO "E64"]
[EventDate "1969.03.22"]
[PlyCount "93"]

1.c4 Nf6 2.g3 g6 3.Bg2 Bg7 4.d4 c5 5.d5 d6 6.Nc3 O-O 7.Nf3 Na6 8.O-O Nc7 
9.e4 Rb8 10.a4 a6 11.a5 b5 12.axb6 Rxb6 13.Re1 Rb4 14.Bf1 e5 15.Na2 Rb7 
16.Rb1 Nd7 17.b4 f5 18.Nd2 Ne8 19.Ba3 Nef6 20.exf5 gxf5 21.Nb3 Ne4 22.Qc2 
Qc7 23.Bg2 cxb4 24.Nxb4 Nec5 25.Nc6 Nxb3 26.Rxb3 Rxb3 27.Qxb3 Nc5 28.Bxc5 
dxc5 29.Rb1 e4 30.Qb6 Qd6 31.Qa7 f4 32.Bxe4 fxg3 33.hxg3 Re8 34.Rb8 Rxe4 
35.Rxc8+ Bf8 36.Kg2 a5 37.Nd8 Re7 38.Qxc5 Qxc5 39.Rxc5 Re8 40.Rc8 a4 41.c5
a3 42.d6 a2 43.d7 Rxd8 44.Rxd8 a1=Q 45.Rxf8+ Kxf8 46.d8=Q+ Kg7 47.Qd5 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "11"]
[White "Rossetto, Hector Decio"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "D01"]
[EventDate "1969.03.22"]
[PlyCount "94"]

1.d4 Nf6 2.Nc3 d5 3.Bg5 Bf5 4.e3 e6 5.Bd3 Bg6 6.Nf3 Be7 7.Bxg6 hxg6 8.Qd3 
c6 9.Bxf6 gxf6 10.O-O-O Qa5 11.Kb1 Nd7 12.e4 O-O-O 13.exd5 cxd5 14.Qb5 
Qxb5 15.Nxb5 a6 16.Nc3 g5 17.h3 Rh6 18.Rhe1 Nf8 19.Re3 Ng6 20.Ne2 Bd6 21.
a4 Kb8 22.Rb3 Ne7 23.Rbd3 Rg8 24.Re3 f5 25.Ne1 f4 26.Rb3 g4 27.hxg4 Rxg4 
28.Rh3 Rxh3 29.gxh3 Rg6 30.Rd3 Nf5 31.Kc1 f6 32.Kd1 Ne7 33.h4 Rh6 34.Rh3 
Nf5 35.Ng2 e5 36.Ke1 Kc7 37.b3 b5 38.axb5 axb5 39.Kf1 Kc6 40.Rc3+ Kd7 41.
Rh3 b4 42.c3 bxc3 43.Nxc3 Nxd4 44.Nxd5 Kc6 45.Nc3 Nxb3 46.Ne4 Nd4 47.Nxd6 
Kxd6 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "11"]
[White "Schweber, Samuel"]
[Black "Riego Prieto, Victorio"]
[Result "1-0"]
[ECO "D41"]
[EventDate "1969.03.22"]
[PlyCount "103"]

1.c4 c5 2.Nc3 Nf6 3.Nf3 d5 4.d4 e6 5.cxd5 Nxd5 6.e3 Nc6 7.Bc4 Nf6 8.O-O 
Be7 9.Qe2 O-O 10.Rd1 Qc7 11.b3 a6 12.Bb2 b5 13.Bd3 Nb4 14.Bb1 Bb7 15.Ne5 
Rfd8 16.a3 cxd4 17.exd4 Nbd5 18.Nxd5 Bxd5 19.Rd3 Rac8 20.Rh3 g6 21.Rg3 Nh5
22.Bxg6 Nxg3 23.Bxf7+ Kh8 24.hxg3 Bf6 25.Qh5 Bxe5 26.dxe5 Rf8 27.Bg6 Qg7 
28.Bd3 Bxb3 29.Rc1 Bc4 30.Bxc4 Rxc4 31.Rd1 Qf7 32.Qxf7 Rxf7 33.Bc1 Kg7 34.
Bg5 Rfc7 35.Rd8 Kg6 36.Bf6 Rc8 37.Rd7 R4c7 38.Rd6 Rc1+ 39.Kh2 Ra1 40.g4 
Rxa3 41.Rxe6 Ra4 42.Kg3 Rg8 43.f4 h5 44.Bg5+ Kf7 45.Rf6+ Ke8 46.gxh5 Kd7 
47.h6 b4 48.e6+ Kd6 49.h7 Rh8 50.e7+ Kd7 51.Rf8 Ra3+ 52.Kg4 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "11"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Rubinetti, Jorge Alberto"]
[Result "1-0"]
[ECO "B54"]
[EventDate "1969.03.22"]
[PlyCount "97"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 d6 6.Bc4 Nge7 7.Be3 Nxd4 8.
Bxd4 Nc6 9.O-O Nxd4 10.Qxd4 a6 11.Rfe1 Qc7 12.b4 Bd7 13.Bb3 O-O-O 14.Re3 
Kb8 15.Ne2 Rg8 16.a4 Be7 17.Rd1 Bf6 18.Qd3 Bc8 19.Ba2 h5 20.Rb1 g5 21.b5 
axb5 22.axb5 b6 23.Rf3 Be5 24.Nd4 Bxd4 25.Qxd4 Qc5 26.Qd2 Rd7 27.Bd5 exd5 
28.Rc3 dxe4 29.Rxc5 dxc5 30.Qe2 Rgd8 31.Qxh5 Rd2 32.Re1 f6 33.h3 Rxc2 34.
Qg6 Rd6 35.Rxe4 Rc1+ 36.Kh2 Ra1 37.Re8 Kc7 38.Qf7+ Bd7 39.Qe7 Rdd1 40.Qd8+
Kd6 41.Qxb6+ Kd5 42.Rd8 Kc4 43.Qxf6 Rh1+ 44.Kg3 Bxb5 45.Rc8 Ra3+ 46.f3 Kb4
47.Qb2+ Rb3 48.Qd2+ Ka3 49.Rxc5 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "12"]
[White "Alvarez del Monte, Jose Luis"]
[Black "Schweber, Samuel"]
[Result "0-1"]
[ECO "B28"]
[EventDate "1969.03.22"]
[PlyCount "68"]

1.e4 c5 2.Nf3 a6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Nb3 Bb4 7.Qd3 d5 8.a3 
Bxc3+ 9.Qxc3 O-O 10.exd5 Qxd5 11.Qc4 Bf5 12.Qxd5 Nxd5 13.c3 Nd7 14.Be2 Bc2
15.Na5 b6 16.Nc4 Nc5 17.Nd2 Nf4 18.b4 Ncd3+ 19.Bxd3 Nxd3+ 20.Ke2 Nf4+ 21.
Kf3 Rad8 22.Nc4 Bd1+ 23.Kg3 Ne2+ 24.Kh3 f6 25.Nxb6 Rd3+ 26.Be3 Nxc3 27.Rc1
Ne4 28.f3 Rxe3 29.Nc4 Nf2+ 30.Kh4 Re4+ 31.fxe4 g5+ 32.Kg3 Nxh1+ 33.Kh3 
Nf2+ 34.Kg3 Nxe4+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "12"]
[White "Canobra, Juvenal"]
[Black "Rossetto, Hector Decio"]
[Result "0-1"]
[ECO "B34"]
[EventDate "1969.03.22"]
[PlyCount "74"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Nb3 Bb4 7.Bc4 O-O 8.Bg5 
h6 9.Bxf6 Bxc3+ 10.bxc3 Qxf6 11.O-O d6 12.Qd3 Be6 13.Bxe6 Qxe6 14.Rfd1 
Rfd8 15.Rd2 Rac8 16.Rad1 Ne7 17.Qb5 b6 18.Rd3 Rc4 19.Nd2 Rc5 20.Qb3 Qc8 
21.Nf1 Qc6 22.f3 a6 23.Ne3 b5 24.Kf1 g6 25.R1d2 Kg7 26.Ke2 Nc8 27.Nd5 Nb6 
28.Nxb6 Qxb6 29.Rd5 Rxd5 30.Qxd5 Qg1 31.Kd3 Qxh2 32.Qc6 h5 33.Qxa6 d5 34.
Re2 dxe4+ 35.Ke3 exf3 36.gxf3 Qg1+ 37.Rf2 Qc1+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "12"]
[White "Garcia, Raimundo"]
[Black "Najdorf, Miguel"]
[Result "1-0"]
[ECO "E67"]
[EventDate "1969.03.22"]
[PlyCount "111"]

1.c4 Nf6 2.g3 g6 3.Bg2 Bg7 4.Nf3 O-O 5.O-O d6 6.Nc3 e5 7.d4 Nbd7 8.e3 Re8 
9.b3 c6 10.Bb2 e4 11.Nd2 d5 12.f3 exf3 13.Qxf3 Nb6 14.c5 Bg4 15.Qf2 Nc8 
16.e4 Be6 17.h3 Ne7 18.e5 Nd7 19.Nf3 f6 20.Ne2 g5 21.exf6 Bxf6 22.h4 h6 
23.hxg5 hxg5 24.Qe3 Nf5 25.Qd2 Ng7 26.Rae1 Bg4 27.Nh2 Bf5 28.Rf2 Qe7 29.
Ref1 Qe6 30.Nf3 Bg4 31.Nc1 Bxf3 32.Rxf3 g4 33.R3f2 Qe7 34.Re2 Qf7 35.Nd3 
Qg6 36.Nf4 Qg5 37.Nxd5 Qg6 38.Nxf6+ Nxf6 39.d5 Rxe2 40.Qxe2 Nxd5 41.Bxd5+ 
cxd5 42.Qd1 Ne6 43.Qxd5 Rd8 44.Qe5 Kh7 45.Re1 Re8 46.Qe4 Ng7 47.Qxg6+ Kxg6
48.Rxe8 Nxe8 49.Kf2 Nc7 50.Ke3 Kf5 51.Kd4 Ke6 52.Ke4 Nd5 53.a3 a6 54.b4 b6
55.c6 Kd6 56.c7 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "12"]
[White "Mendivil Salinas, Ismael"]
[Black "Bronstein, Luis Marcos"]
[Result "0-1"]
[ECO "B34"]
[EventDate "1969.03.22"]
[PlyCount "92"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Be2 O-O 8.O-O 
d5 9.exd5 Nb4 10.Qd2 Nbxd5 11.Nxd5 Nxd5 12.Bh6 e5 13.Bxg7 Kxg7 14.Nf3 Nf4 
15.Qe3 Qf6 16.Bd1 Re8 17.c3 Bg4 18.Nd2 Rad8 19.Ne4 Qe6 20.Bb3 Qc6 21.f3 
Bf5 22.Rfd1 f6 23.h3 b6 24.a4 Qc7 25.Ba2 Rxd1+ 26.Rxd1 Rd8 27.Rxd8 Qxd8 
28.Qe1 Bxe4 29.fxe4 Qd7 30.b3 Qd3 31.Bb1 Qxc3 32.Qxc3 Ne2+ 33.Kf1 Nxc3 34.
Bd3 f5 35.exf5 e4 36.Bc4 gxf5 37.Kf2 f4 38.Ba6 Kf6 39.Bc8 Ke5 40.Bd7 Kd4 
41.Bf5 h6 42.Bg6 Kd3 43.Ke1 Ke3 44.Bf7 f3 45.gxf3 exf3 46.Bc4 Ne4 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "12"]
[White "Panno, Oscar"]
[Black "Garcia Toledo, Pedro"]
[Result "1-0"]
[ECO "D45"]
[EventDate "1969.03.22"]
[PlyCount "82"]

1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 Nf6 5.Nf3 Nbd7 6.Qc2 Bd6 7.b3 O-O 8.Be2 e5 
9.Bb2 Re8 10.cxd5 cxd5 11.Nb5 Bb8 12.Rc1 e4 13.Nd2 Nf8 14.Nc7 Bxc7 15.Qxc7
Qxc7 16.Rxc7 Ne6 17.Rc1 Bd7 18.Nb1 Rac8 19.Nc3 Nc7 20.h3 Re6 21.Kd2 Rc6 
22.Ba3 Nfe8 23.Rc2 f5 24.Rhc1 Kf7 25.Bc5 b6 26.Bb4 Nf6 27.a4 a6 28.a5 b5 
29.Bc5 Ne6 30.Na2 Ra8 31.Nb4 Rcc8 32.Bd6 Rxc2+ 33.Rxc2 Ne8 34.Be5 Nf6 35.
Bxf6 Kxf6 36.Nxd5+ Kf7 37.g4 g6 38.Nb6 Rd8 39.Nxd7 Rxd7 40.Rc6 Ng5 41.gxf5
gxf5 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "12"]
[White "Riego Prieto, Victorio"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "0-1"]
[ECO "C96"]
[EventDate "1969.03.22"]
[PlyCount "86"]

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 Na5 10.Bc2 c5 11.d4 cxd4 12.cxd4 Qc7 13.Nc3 Bb7 14.d5 Bc8 15.Ne2 Bd7 
16.Ng3 Rfc8 17.Bd3 Nb7 18.Be3 b4 19.b3 Qa5 20.Nd2 Nc5 21.Nc4 Qd8 22.Bc2 
Bb5 23.Bxc5 Rxc5 24.Bd3 g6 25.Qd2 a5 26.Qe2 Rb8 27.Rec1 Qc7 28.Rc2 h5 29.
Qe3 Nh7 30.Nf1 Bg5 31.Qe2 Nf6 32.Nh2 Rc8 33.h4 Bh6 34.Kh1 Qe7 35.Rg1 Nd7 
36.g4 Qxh4 37.gxh5 Bf4 38.f3 Qxh5 39.Rb2 Bxh2 40.Qxh2 Qxf3+ 41.Rbg2 Bxc4 
42.Bxc4 Rxc4 43.bxc4 Kg7 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "12"]
[White "Rocha, Antonio Cavilhas"]
[Black "Quinteros, Miguel Angel"]
[Result "1/2-1/2"]
[ECO "B85"]
[EventDate "1969.03.22"]
[PlyCount "32"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.Be2 Nf6 7.a3 d6 8.O-O b5 
9.f4 Bb7 10.Bf3 Nbd7 11.Kh1 Be7 12.Qe1 Rb8 13.Qg3 O-O 14.Bd2 Qc4 15.Nb3 
Qc7 16.Nd4 Qc4 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "12"]
[White "Rubinetti, Jorge Alberto"]
[Black "Mecking, Henrique"]
[Result "1-0"]
[ECO "B09"]
[EventDate "1969.03.22"]
[PlyCount "81"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 O-O 6.Bd3 Nc6 7.Be3 e5 8.fxe5 
dxe5 9.d5 Nd4 10.Nxe5 Nxd5 11.Bxd4 Nf4 12.Ne2 Nxe2 13.Bxe2 Qh4+ 14.Bf2 
Qxe4 15.Nf3 Re8 16.Kf1 Bxb2 17.Rb1 Bg7 18.Bd3 Qe7 19.Qe1 Qd7 20.Qb4 b6 21.
h4 c5 22.Qf4 Qg4 23.Qxg4 Bxg4 24.a4 Rac8 25.Nd2 Rcd8 26.a5 Bh6 27.Nf3 Re6 
28.axb6 axb6 29.Nh2 Bf5 30.Bxf5 gxf5 31.Nf3 Ra8 32.Rg1 Ra4 33.g3 Rae4 34.
Rb2 Re2 35.Rg2 Bc1 36.Ra2 Kg7 37.Bd4+ cxd4 38.Rxe2 Be3 39.Ra4 Re4 40.Kg2 
Rg4 41.Rxe3 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "12"]
[White "Silva Sanchez, Carlos"]
[Black "Camara, Helder"]
[Result "0-1"]
[ECO "E62"]
[EventDate "1969.03.22"]
[PlyCount "94"]

1.c4 Nf6 2.Nc3 g6 3.g3 Bg7 4.Bg2 O-O 5.d4 d6 6.Nf3 Nc6 7.d5 Na5 8.Nd2 c5 
9.Qc2 e5 10.Rb1 b6 11.O-O Ng4 12.b3 f5 13.Nd1 f4 14.Ne4 Qe7 15.a3 Nb7 16.
Bd2 Bd7 17.Ndc3 Rac8 18.Rfd1 h5 19.Nb5 h4 20.Nxa7 hxg3 21.fxg3 Nxh2 22.
Kxh2 fxg3+ 23.Kxg3 Rf4 24.Bxf4 exf4+ 25.Kf2 Qh4+ 26.Kg1 Re8 27.Nc6 Bf5 28.
b4 Rxe4 29.Qxe4 Bxe4 30.Bxe4 Qg3+ 31.Kf1 Qh3+ 32.Bg2 Qxa3 33.Rd3 Qa2 34.
Rdb3 Bd4 35.Bh3 Be3 36.Bc8 Qc2 37.Bg4 Kg7 38.bxc5 Nxc5 39.Rxb6 Qe4 40.Bf3 
Qf5 41.Ke1 Qc2 42.Rb8 Nd3+ 43.Kf1 Nc1 44.R1b7+ Kf6 45.Kg2 Qd1 46.Bh5 Qg1+ 
47.Kf3 Qh1+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "13"]
[White "Bronstein, Luis Marcos"]
[Black "Silva Sanchez, Carlos"]
[Result "1-0"]
[ECO "E90"]
[EventDate "1969.03.22"]
[PlyCount "85"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 O-O 5.Nf3 d6 6.Be3 c5 7.d5 e6 8.h3 exd5 9.
exd5 Bf5 10.Bd3 Qd7 11.Qc2 Bxd3 12.Qxd3 Na6 13.O-O Nc7 14.Bf4 Rfe8 15.Rfe1
Rxe1+ 16.Rxe1 Re8 17.Rxe8+ Ncxe8 18.b3 Bf8 19.Kf1 Ng7 20.Ng5 Qf5 21.Qxf5 
Nxf5 22.Nge4 Ne8 23.Nb5 a6 24.Na7 Ne7 25.Bxd6 Nxd6 26.Nxd6 Nxd5 27.Nxb7 
Nb4 28.a4 f6 29.Ke2 Kf7 30.Nc8 Ke6 31.Nb6 Be7 32.a5 Nc2 33.Kd2 Nd4 34.Kc3 
Ne2+ 35.Kc2 Nf4 36.Na4 Nxg2 37.Naxc5+ Bxc5 38.Nxc5+ Kd6 39.Nxa6 g5 40.b4 
h5 41.b5 g4 42.hxg4 h4 43.b6 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "13"]
[White "Camara, Helder"]
[Black "Rocha, Antonio Cavilhas"]
[Result "1-0"]
[ECO "C97"]
[EventDate "1969.03.22"]
[PlyCount "51"]

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 Na5 10.Bc2 c5 11.d4 Qc7 12.b4 cxb4 13.cxb4 Nc6 14.Bb2 exd4 15.Nxd4 
Nxb4 16.Bb3 Re8 17.Nc3 Bd7 18.Rc1 Qb6 19.a3 Nc6 20.Nd5 Nxd5 21.Bxd5 Rac8 
22.Nxc6 Bxc6 23.Rxc6 Rxc6 24.Qg4 g6 25.Qf4 Rf8 26.Qh6 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "13"]
[White "Garcia Toledo, Pedro"]
[Black "Canobra, Juvenal"]
[Result "0-1"]
[ECO "A56"]
[EventDate "1969.03.22"]
[PlyCount "104"]

1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.Bd3 O-O 7.Nge2 Nbd7 8.f3 Ne8 
9.g4 a6 10.Be3 Rb8 11.Qd2 Nc7 12.a4 Nf6 13.Ng3 Nfe8 14.Nf5 Bd7 15.a5 b5 
16.axb6 Rxb6 17.O-O g6 18.Nxe7+ Qxe7 19.Kh1 Ng7 20.Rg1 Rfb8 21.Rg2 Rxb2 
22.Qxb2 Rxb2 23.Rxb2 Qh4 24.Rg1 Qd8 25.Rgb1 Nge8 26.Kg2 Kg7 27.Kg3 a5 28.
Rb8 Qe7 29.Bc2 Na6 30.R8b7 Qd8 31.Ba4 Bc8 32.R7b2 Nb4 33.Ra1 f5 34.gxf5 
gxf5 35.exf5 Bxf5 36.Rg2 Kf7 37.Ne4 Nf6 38.Bd1 Nd3 39.Ng5+ Ke7 40.h3 Nh5+ 
41.Kh2 Ndf4 42.Bxf4 Nxf4 43.Rg3 Qb6 44.Ra4 Qb2+ 45.Kh1 Qd2 46.Ra1 Qe1+ 47.
Rg1 Qh4 48.Ra2 h6 49.Ne4 Nxh3 50.Rf1 Nf2+ 51.Kg1 Nxd1 52.Rh2 Qf4 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "13"]
[White "Mecking, Henrique"]
[Black "Riego Prieto, Victorio"]
[Result "1-0"]
[ECO "B90"]
[EventDate "1969.03.22"]
[PlyCount "59"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 Qc7 7.Bb3 e6 8.g4 h6 
9.f3 Nc6 10.Be3 Be7 11.Qe2 Bd7 12.O-O-O O-O-O 13.h4 g6 14.Qd2 h5 15.g5 Nh7
16.f4 Rhe8 17.Nxc6 Bxc6 18.Qf2 Rd7 19.Bb6 Qb8 20.Rhe1 Bd8 21.Na4 Nf8 22.f5
Bc7 23.Bxc7 Kxc7 24.Qb6+ Kc8 25.Qa5 Rdd8 26.Nb6+ Kc7 27.e5 Bf3 28.Rd3 exf5
29.Rxf3 Ne6 30.Rc3+ 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "13"]
[White "Quinteros, Miguel Angel"]
[Black "Garcia, Raimundo"]
[Result "1-0"]
[ECO "A25"]
[EventDate "1969.03.22"]
[PlyCount "59"]

1.c4 e5 2.Nc3 Nc6 3.g3 f5 4.Bg2 Nf6 5.d3 d6 6.e3 g6 7.Nge2 Bg7 8.Rb1 O-O 
9.b4 a6 10.a4 Rb8 11.b5 axb5 12.axb5 Ne7 13.f4 Be6 14.Qb3 h6 15.d4 g5 16.
O-O exf4 17.exf4 g4 18.d5 Bf7 19.Be3 Nd7 20.Na4 c5 21.dxc6 bxc6 22.Qd3 
cxb5 23.cxb5 Qa5 24.Qxd6 Qxa4 25.Qxd7 Qa2 26.Qxe7 Qxe2 27.Rfe1 Qd3 28.Red1
Qc4 29.Qc5 Qa4 30.Rd7 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "13"]
[White "Rodriguez Vargas, Orestes"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "B25"]
[EventDate "1969.03.22"]
[PlyCount "102"]

1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.f4 f5 7.Nf3 Nf6 8.O-O O-O 9.
h3 Rb8 10.a4 Kh8 11.Kh2 Be6 12.Be3 Bg8 13.Qd2 Qd7 14.Rae1 b6 15.e5 Nd5 16.
Nxd5 Bxd5 17.d4 cxd4 18.Nxd4 Bxg2 19.Qxg2 Nxd4 20.Bxd4 Qxa4 21.c3 Qd7 22.
exd6 Qxd6 23.Re5 Kg8 24.Rd5 Qc7 25.Qe2 Rfd8 26.Qe6+ Kf8 27.Rd1 Bxd4 28.
R1xd4 Rxd5 29.Qxd5 Rc8 30.h4 Qc6 31.Qe5 Kf7 32.Qe3 Qe6 33.Qd2 Rc4 34.Rxc4 
Qxc4 35.Qe3 h5 36.Qd2 a5 37.Qe3 Qb3 38.Qe2 b5 39.Qd2 a4 40.Qe2 Qd5 41.Kg1 
Qc5+ 42.Kh1 Qc4 43.Qd2 Qe4+ 44.Kh2 Ke8 45.Kg1 Qf3 46.Kh2 Qc6 47.Qd4 Qd6 
48.Qe3 Qd5 49.Qe2 Kd7 50.Kg1 Kd6 51.Kf2 e6 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "13"]
[White "Rossetto, Hector Decio"]
[Black "Rubinetti, Jorge Alberto"]
[Result "0-1"]
[ECO "E73"]
[EventDate "1969.03.22"]
[PlyCount "48"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.h4 c5 7.d5 e6 8.h5 exd5 9.
exd5 a6 10.hxg6 fxg6 11.Bh6 Bxh6 12.Rxh6 Nbd7 13.Qd2 Ne5 14.f3 Bd7 15.Rh2 
Qe7 16.Nh3 Nxc4 17.Qh6 Qe3 18.Nf4 Qd2+ 19.Kf2 Nxb2 20.Ne4 Nxe4+ 21.fxe4 
Qxf4+ 22.Qxf4 Rxf4+ 23.Ke3 Raf8 24.Rb1 Rxe4+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "13"]
[White "Schweber, Samuel"]
[Black "Mendivil Salinas, Ismael"]
[Result "1-0"]
[ECO "E93"]
[EventDate "1969.03.22"]
[PlyCount "89"]

1.e4 g6 2.d4 d6 3.c4 Nf6 4.Nc3 Bg7 5.Be2 O-O 6.Bg5 Nbd7 7.Nf3 e5 8.d5 h6 
9.Bh4 a5 10.Nd2 Nc5 11.g4 Qd7 12.f3 Nh7 13.Bf2 b6 14.h4 f5 15.h5 fxg4 16.
hxg6 Nf6 17.fxg4 Nxg4 18.Bg1 Rf6 19.Nf3 Rxg6 20.Nh4 Rg5 21.Nf5 h5 22.Bxg4 
Rxg4 23.Bxc5 bxc5 24.Qe2 Qf7 25.Ne3 Rg3 26.Kd2 Bh6 27.Rag1 Rxg1 28.Rxg1+ 
Bg4 29.Ke1 Bxe3 30.Qxe3 Qf4 31.Nd1 Kh7 32.Rf1 Qxe3+ 33.Nxe3 Kg6 34.Rf2 Re8
35.Kf1 Re7 36.Kg2 Rf7 37.Rxf7 Kxf7 38.Nxg4 hxg4 39.Kg3 Kg6 40.Kxg4 a4 41.
Kf3 Kh5 42.Ke3 Kg4 43.Kd3 Kf3 44.a3 Kf4 45.b3 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "13"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Alvarez del Monte, Jose Luis"]
[Result "1-0"]
[ECO "C91"]
[EventDate "1969.03.22"]
[PlyCount "67"]

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.d4 Bg4 10.Be3 Nxe4 11.Bd5 Qd7 12.Bxe4 d5 13.Bxh7+ Kxh7 14.dxe5 Qf5 15.
Nd4 Qg6 16.f3 Bd7 17.Nxc6 Bxc6 18.Nd2 f6 19.exf6 gxf6 20.Nb3 Bd6 21.Qd4 
Qh5 22.Bf4 Rf7 23.Bxd6 cxd6 24.Re6 Rg8 25.Rae1 Rfg7 26.Re7 Qg5 27.g3 f5 
28.Rxg7+ Rxg7 29.f4 Qh5 30.Nd2 Qh3 31.Re3 b4 32.cxb4 Qg4 33.Nf3 Kh8 34.Re7
1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "14"]
[White "Alvarez del Monte, Jose Luis"]
[Black "Mecking, Henrique"]
[Result "0-1"]
[ECO "B92"]
[EventDate "1969.03.22"]
[PlyCount "60"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 g6 7.Be3 Nbd7 8.f4 
Qc7 9.h3 b5 10.Bf3 Bb7 11.O-O Bg7 12.a3 O-O 13.Nb3 Rac8 14.Qe2 Nb6 15.Na5 
Ba8 16.Bd2 Nfd7 17.Rab1 e5 18.g3 exf4 19.gxf4 Rfe8 20.Qg2 Na4 21.Nxa4 bxa4
22.Rfc1 Nf6 23.Re1 Qxc2 24.Rbc1 Qxb2 25.Nc4 Qb5 26.Nxd6 Qb6+ 27.Qf2 Qxd6 
28.e5 Qxa3 29.Bxa8 Rxa8 30.exf6 Bxf6 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "14"]
[White "Canobra, Juvenal"]
[Black "Rodriguez Vargas, Orestes"]
[Result "0-1"]
[ECO "B86"]
[EventDate "1969.03.22"]
[PlyCount "70"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 e6 7.Bb3 Be7 8.g4 O-O
9.Be3 b5 10.f3 Bd7 11.Qd2 Nc6 12.Nxc6 Bxc6 13.Ne2 d5 14.Nd4 Bb7 15.e5 Nd7 
16.f4 Nc5 17.O-O Qc7 18.c3 Ne4 19.Qg2 b4 20.cxb4 Bxb4 21.Rac1 Qd7 22.Bc2 
Rac8 23.a3 Bc5 24.Bxe4 dxe4 25.Rxc5 Rxc5 26.Nxe6 fxe6 27.Bxc5 e3 28.Qg3 
Rc8 29.Bxe3 Rc2 30.Rc1 Rxb2 31.Bf2 Qd5 32.Kf1 Rb3 33.Be3 Qh1+ 34.Ke2 Rb2+ 
35.Bd2 Qxc1 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "14"]
[White "Garcia, Raimundo"]
[Black "Camara, Helder"]
[Result "1/2-1/2"]
[ECO "A36"]
[EventDate "1969.03.22"]
[PlyCount "43"]

1.c4 g6 2.Nc3 c5 3.g3 Bg7 4.Bg2 Nc6 5.a3 d6 6.Rb1 a5 7.d3 e6 8.h4 h6 9.e3 
Nge7 10.Nge2 b6 11.d4 Ba6 12.Qa4 Qd7 13.d5 exd5 14.Nxd5 Nxd5 15.Bxd5 Rc8 
16.O-O Ne5 17.Qxd7+ Nxd7 18.b3 b5 19.Bd2 Nb6 20.Bf3 bxc4 21.Bxa5 Nd7 22.
bxc4 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "14"]
[White "Mendivil Salinas, Ismael"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "0-1"]
[ECO "C55"]
[EventDate "1969.03.22"]
[PlyCount "60"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.d3 d5 5.exd5 Nxd5 6.h3 f6 7.Bd2 Be6 8.Bb5 
Qd6 9.Nc3 Nxc3 10.Bxc3 O-O-O 11.Qe2 Nb4 12.a3 Nd5 13.Bd2 g5 14.Bc4 Rg8 15.
O-O-O Nf4 16.Qe3 Bxc4 17.dxc4 Qa6 18.g3 Ne6 19.Qc3 e4 20.Nh2 f5 21.Rhe1 
Bg7 22.Qb4 Rd6 23.Qa5 Qxc4 24.Qxa7 Qa2 25.Qa8+ Kd7 26.Qa4+ b5 27.Qxb5+ Kc8
28.c3 Rb6 29.Qxb6 cxb6 30.g4 Nc5 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "14"]
[White "Najdorf, Miguel"]
[Black "Quinteros, Miguel Angel"]
[Result "1-0"]
[ECO "B06"]
[EventDate "1969.03.22"]
[PlyCount "97"]

1.d4 g6 2.e4 Bg7 3.c3 d6 4.Nf3 Nf6 5.Bd3 O-O 6.O-O Bg4 7.Nbd2 c6 8.h3 Bxf3
9.Nxf3 Nfd7 10.Bg5 Re8 11.a4 a5 12.Qd2 Qc7 13.Nh2 f6 14.Bh6 e6 15.Bxg7 
Kxg7 16.Ng4 Qd8 17.Rae1 Kh8 18.Qh6 Rg8 19.f4 f5 20.exf5 exf5 21.Nh2 Nf8 
22.Re2 Nbd7 23.Rfe1 Rg7 24.Nf3 Nf6 25.Ng5 d5 26.Re5 Ne4 27.Bxe4 fxe4 28.f5
gxf5 29.Rxf5 Qe7 30.Ref1 Re8 31.h4 Kg8 32.Rf7 Rxf7 33.Rxf7 Qxf7 34.Nxf7 
Kxf7 35.Qf4+ Kg8 36.Qc7 e3 37.Kf1 Ne6 38.Qg3+ Ng7 39.Ke2 h5 40.Qd6 Kf7 41.
g4 hxg4 42.Qd7+ Re7 43.Qxg4 Re4 44.Qd7+ Re7 45.Qc8 Re4 46.Qxb7+ Kf6 47.
Qxc6+ Ne6 48.Ke1 Rxh4 49.Qd6 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "14"]
[White "Riego Prieto, Victorio"]
[Black "Rossetto, Hector Decio"]
[Result "0-1"]
[ECO "B33"]
[EventDate "1969.03.22"]
[PlyCount "96"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 
h6 9.Bxf6 gxf6 10.Nc4 f5 11.Ne3 f4 12.Ned5 Be6 13.Qh5 Rg8 14.h3 Rg5 15.Qd1
Rc8 16.Qd2 Nd4 17.O-O-O Bxd5 18.exd5 Be7 19.Kb1 b5 20.Rc1 Rg6 21.f3 Qb6 
22.Ne4 Nf5 23.Nf2 Qe3 24.Qd3 Ng3 25.Ng4 Qc5 26.Rh2 h5 27.Qd2 Nxf1 28.Rxf1 
hxg4 29.hxg4 Rg8 30.Rc1 Qd4 31.Qa5 Qxd5 32.a3 Bd8 33.Qe1 Rc4 34.Rh5 Qc5 
35.c3 Qc6 36.Rf5 a5 37.Rd1 Be7 38.Qh1 b4 39.Qh7 Rf8 40.cxb4 axb4 41.axb4 
Qa4 42.Rc1 Rxc1+ 43.Kxc1 Qxb4 44.Rh5 Qe1+ 45.Kc2 Qe2+ 46.Kb1 Qd1+ 47.Ka2 
Kd7 48.Qf5+ Kc6 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "14"]
[White "Rocha, Antonio Cavilhas"]
[Black "Bronstein, Luis Marcos"]
[Result "1/2-1/2"]
[ECO "B47"]
[EventDate "1969.03.22"]
[PlyCount "99"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Qc7 5.Nc3 e6 6.g3 a6 7.Bg2 Nge7 8.Nb3 
Ng6 9.a4 Bb4 10.O-O O-O 11.Ne2 Re8 12.f4 Be7 13.Be3 b6 14.Ned4 Bb7 15.Qd2 
Nxd4 16.Bxd4 Rac8 17.Bc3 Bf8 18.Rfd1 Red8 19.Qe3 e5 20.fxe5 Nxe5 21.Qf2 d6
22.Rf1 Bc6 23.Bd4 Rb8 24.a5 bxa5 25.Nxa5 Be8 26.c4 Rdc8 27.b3 Qd7 28.Kh1 
Qe6 29.Ba7 Ra8 30.Rad1 Nc6 31.Nxc6 Bxc6 32.Rfe1 Qd7 33.Bd4 Qb7 34.Rd3 Re8 
35.Rde3 Re6 36.e5 dxe5 37.Rxe5 Rxe5 38.Bxe5 Re8 39.Bxc6 Qxc6+ 40.Qg2 Qf6 
41.Bc3 Rxe1+ 42.Bxe1 a5 43.Qf2 Qc6+ 44.Qg2 Qf6 45.Qf2 Qa1 46.Kg2 a4 47.
bxa4 Qxa4 48.Qd4 Qc6+ 49.Qd5 Qxd5+ 50.cxd5 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "14"]
[White "Rubinetti, Jorge Alberto"]
[Black "Garcia Toledo, Pedro"]
[Result "1-0"]
[ECO "C85"]
[EventDate "1969.03.22"]
[PlyCount "103"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Bxc6 dxc6 7.d3 Bg4 8.h3 
Bxf3 9.Qxf3 Bd6 10.Bg5 h6 11.Bxf6 Qxf6 12.Qxf6 gxf6 13.Nd2 h5 14.Nf3 h4 
15.Nh2 Ke7 16.Ng4 Bc5 17.Kh1 Ke6 18.f4 Bd6 19.fxe5 Bxe5 20.c3 c5 21.Rf3 
Rag8 22.Raf1 Rg6 23.Nxe5 fxe5 24.Rxf7 Rhg8 25.R1f2 R8g7 26.Rf8 Rg3 27.Re8+
Kd6 28.Rh8 Rxd3 29.Rh6+ Ke7 30.Re2 a5 31.Rxh4 a4 32.a3 b5 33.Rh5 Kd6 34.
Rf5 Rgg3 35.Rf6+ Kd7 36.Rf7+ Kc6 37.Kh2 b4 38.cxb4 cxb4 39.axb4 Rge3 40.
Rc2+ Kb6 41.Rcxc7 Rxe4 42.Rb7+ Ka6 43.Ra7+ Kb5 44.Rfb7+ Kc6 45.Rb8 Rd2 46.
b5+ Kc5 47.Rc7+ Kb4 48.b6 Rxb2 49.b7 Ka3 50.Ra8 Rd4 51.Rc3+ Ka2 52.Re3 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "14"]
[White "Silva Sanchez, Carlos"]
[Black "Schweber, Samuel"]
[Result "1/2-1/2"]
[ECO "E66"]
[EventDate "1969.03.22"]
[PlyCount "197"]

1.Nf3 Nf6 2.g3 g6 3.Bg2 Bg7 4.O-O O-O 5.d4 d6 6.c4 Nc6 7.d5 Na5 8.Nfd2 c5 
9.Qc2 Rb8 10.Nc3 a6 11.Rb1 e5 12.b3 b5 13.cxb5 axb5 14.b4 cxb4 15.Rxb4 Bd7
16.Nb3 Ne8 17.e4 Nc7 18.Bg5 Qxg5 19.Nxa5 Na6 20.Rbb1 Rfc8 21.Nc6 Bxc6 22.
dxc6 Rxc6 23.Qd3 b4 24.Nd5 Qd8 25.Bh3 Bh6 26.Bd7 Nc5 27.Qc4 Ra6 28.Bb5 Ra5
29.Rxb4 Nxe4 30.Qxe4 Raxb5 31.Rxb5 Rxb5 32.a4 Ra5 33.Ra1 Qa8 34.Nf6+ Kg7 
35.Qxa8 Rxa8 36.Nd5 Bd2 37.Ra2 Ba5 38.Rc2 Bd8 39.Rc6 Rxa4 40.Rxd6 Ra8 41.
Kg2 Ba5 42.Rd7 Be1 43.Kf1 Ra1 44.h4 Bb4+ 45.Kg2 Bc5 46.Nc3 Bd4 47.Ne4 Ra2 
48.g4 h6 49.Kg3 Kf8 50.g5 Ra3+ 51.Kg2 hxg5 52.hxg5 Ra7 53.Rxa7 Bxa7 54.Kf3
Ke7 55.Kg4 Ke6 56.f3 Be3 57.Nf6 Kd6 58.Ne4+ Kd5 59.Nf6+ Kd4 60.Ne4 Kd5 61.
Nf6+ Kc6 62.Ng8 Kd5 63.Nf6+ Kc4 64.Ne4 Bc5 65.Nf6 Kd3 66.Ne4 Ba3 67.Nd6 
Ke3 68.Kg3 Bc1 69.Ne4 Ba3 70.Nf6 Ke2 71.Ne4 Bb4 72.Nf6 Be1+ 73.Kg4 Bd2 74.
Ne4 Bb4 75.Kg3 Be7 76.Kg2 Ke3 77.Kg3 Bd8 78.Kg4 Bc7 79.Nf6 Kf2 80.Ne4+ Kg2
81.Nf6 Bd8 82.Nd7 Bc7 83.Nf6 Bd6 84.Nd7 Bc7 85.Nf6 Bb6 86.Ng8 Be3 87.Ne7 
Bb6 88.Ng8 Be3 89.Ne7 Kf2 90.Nc6 Bd4 91.Nd8 e4 92.fxe4 Ke3 93.Nxf7 Kxe4 
94.Nd6+ Ke5 95.Nc4+ Kd5 96.Nd2 Be3 97.Nf3 Bf2 98.Kf4 Kd6 99.Ke4 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "15"]
[White "Bronstein, Luis Marcos"]
[Black "Garcia, Raimundo"]
[Result "0-1"]
[ECO "C58"]
[EventDate "1969.03.22"]
[PlyCount "80"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.d3 h6 7.Nf3 e4 8.dxe4 
Nxc4 9.Qd4 Nd6 10.Nc3 c6 11.O-O cxd5 12.e5 Nf5 13.Qd3 Ne4 14.Nxd5 Nc5 15.
Qd2 Be6 16.c4 Be7 17.b3 O-O 18.Bb2 Re8 19.Rad1 Bf8 20.Rfe1 Rc8 21.Re2 Nh4 
22.Re3 Bg4 23.Nxh4 Qxh4 24.Rde1 Red8 25.Rg3 Be6 26.h3 Bxd5 27.cxd5 Ne4 28.
Qd4 Bc5 29.Rxe4 Bxd4 30.Rxd4 Qe7 31.Rdg4 g6 32.e6 g5 33.Rh4 Kh7 34.exf7 
Rxd5 35.Rhg4 Qxf7 36.Bd4 Rxd4 37.Rxd4 Rc1+ 38.Kh2 Qxf2 39.Rgd3 Qg1+ 40.Kg3
Qe1+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "15"]
[White "Camara, Helder"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "E46"]
[EventDate "1969.03.22"]
[PlyCount "82"]

1.c4 Nf6 2.Nc3 e6 3.e3 Bb4 4.Nge2 O-O 5.a3 Be7 6.d4 d5 7.Ng3 c5 8.dxc5 
Bxc5 9.cxd5 exd5 10.Be2 Nc6 11.O-O Be6 12.b4 Bd6 13.Nb5 Be5 14.Nd4 Nxd4 
15.exd4 Bc7 16.f4 Bd7 17.f5 h6 18.Bf4 Bxf4 19.Rxf4 Re8 20.Qd3 Qe7 21.Rc1 
Bb5 22.Qd2 Bxe2 23.Re1 Qe3+ 24.Qxe3 Rxe3 25.Rxe2 Rxa3 26.Re7 b6 27.Rf1 Rc8
28.Rfe1 Rc4 29.Rb7 Rxb4 30.Rb8+ Kh7 31.Rf8 Rxd4 32.Rxf7 Rf4 33.Rc1 Ra2 34.
Nf1 Rxf5 35.h3 Rff2 36.Ne3 d4 37.Rcc7 dxe3 38.Rxg7+ Kh8 39.Rg3 Nh7 40.Rxe3
Rxg2+ 41.Kh1 Rge2 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "15"]
[White "Garcia Toledo, Pedro"]
[Black "Riego Prieto, Victorio"]
[Result "0-1"]
[ECO "E77"]
[EventDate "1969.03.22"]
[PlyCount "116"]

1.d4 g6 2.c4 Bg7 3.Nc3 d6 4.e4 Nf6 5.f4 c5 6.d5 O-O 7.Nf3 Nfd7 8.Bd3 Re8 
9.O-O Na6 10.Be3 Nc7 11.Qd2 e5 12.dxe6 Nxe6 13.Rad1 Nf6 14.h3 Qe7 15.Bc2 
Bf8 16.Bf2 Bh6 17.Ng5 Rd8 18.Rfe1 Nh5 19.Nd5 Qf8 20.Be3 Bg7 21.g4 Nf6 22.
Nf3 Nxd5 23.exd5 Nc7 24.b4 b6 25.f5 Kh8 26.fxg6 fxg6 27.Rf1 Re8 28.Ba4 Re7
29.Ng5 Qg8 30.Qf2 h6 31.Nf7+ Kh7 32.bxc5 bxc5 33.Nxd6 Na6 34.Nxc8 Rxc8 35.
d6 Re5 36.Bb5 Nb8 37.d7 Rd8 38.Bxc5 a6 39.Bd6 axb5 40.Bxe5 Bxe5 41.cxb5 
Kg7 42.Qe3 Qe6 43.Rfe1 Rxd7 44.Rc1 Re7 45.Qf2 Nd7 46.Red1 Rf7 47.Qg2 Qb6+ 
48.Kh1 Qxb5 49.Rb1 Qa4 50.Rf1 Bf4 51.Rb7 g5 52.Qd5 Qa6 53.Rxf4 gxf4 54.
Rxd7 Qf1+ 55.Kh2 Qf2+ 56.Kh1 Qe1+ 57.Kh2 Qg3+ 58.Kh1 Qxh3+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "15"]
[White "Mecking, Henrique"]
[Black "Mendivil Salinas, Ismael"]
[Result "1-0"]
[ECO "B07"]
[EventDate "1969.03.22"]
[PlyCount "90"]

1.e4 g6 2.d4 d6 3.Nc3 Bg7 4.Be3 Nf6 5.f3 O-O 6.Qd2 e5 7.d5 Ne8 8.g4 c5 9.
h4 f5 10.gxf5 gxf5 11.exf5 Bxf5 12.O-O-O Rf7 13.Nh3 Na6 14.Ng5 Re7 15.Ne6 
Qa5 16.a3 Rb8 17.Nxg7 Nxg7 18.Ne4 Qxd2+ 19.Rxd2 Bxe4 20.fxe4 Nc7 21.Bxc5 
dxc5 22.d6 Rf7 23.dxc7 Rxc7 24.Bc4+ Kh8 25.Rhd1 Nh5 26.Rd8+ Rxd8 27.Rxd8+ 
Kg7 28.Re8 Nf4 29.Rxe5 Ng6 30.Rg5 Kh6 31.Be2 c4 32.Kd2 Nf4 33.Bf3 Ne6 34.
Rd5 Nc5 35.e5 b6 36.Ke3 Kg7 37.Rd6 Na4 38.h5 Nxb2 39.h6+ Kf8 40.Bd5 c3 41.
Rd8+ Ke7 42.Rh8 Rc5 43.Rxh7+ Kf8 44.Rh8+ Ke7 45.Kd4 Nd3 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "15"]
[White "Panno, Oscar"]
[Black "Canobra, Juvenal"]
[Result "1-0"]
[ECO "A25"]
[EventDate "1969.03.22"]
[PlyCount "77"]

1.c4 e5 2.Nc3 g6 3.g3 Bg7 4.Bg2 Ne7 5.e3 Nbc6 6.Nge2 O-O 7.O-O Nf5 8.Rb1 
a5 9.a3 d6 10.d3 Bd7 11.b4 Rb8 12.Bd2 axb4 13.axb4 Nce7 14.Qc2 b6 15.Ra1 
h5 16.Nd5 c6 17.Nxe7+ Nxe7 18.Ra7 Ra8 19.Rfa1 Rxa7 20.Rxa7 Nc8 21.Rb7 Ne7 
22.Nc3 Bc8 23.Ra7 Bf5 24.e4 Bg4 25.Qa4 Bf6 26.Bh6 Re8 27.Be3 Qb8 28.h3 Be6
29.Kh2 Nc8 30.Ra8 Qc7 31.Nd5 Bxd5 32.exd5 b5 33.cxb5 cxb5 34.Qxb5 Rf8 35.
Qc6 Qd8 36.b5 h4 37.b6 hxg3+ 38.fxg3 Bg5 39.b7 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "15"]
[White "Rodriguez Vargas, Orestes"]
[Black "Rubinetti, Jorge Alberto"]
[Result "1/2-1/2"]
[ECO "B25"]
[EventDate "1969.03.22"]
[PlyCount "112"]

1.e4 c5 2.Nc3 d6 3.g3 Nc6 4.Bg2 g6 5.d3 Bg7 6.f4 e6 7.Nf3 Nge7 8.O-O O-O 
9.Be3 Nd4 10.Rb1 Rb8 11.Ne2 Nec6 12.c3 Nxe2+ 13.Qxe2 f5 14.Kh1 b6 15.Rbd1 
Qc7 16.Ng5 Bd7 17.Bf3 Rbe8 18.Qg2 Nd8 19.g4 Nf7 20.Nh3 Kh8 21.Rg1 Bc8 22.
Nf2 Qe7 23.Rde1 fxe4 24.dxe4 g5 25.f5 Ne5 26.Bd1 Bf6 27.Ba4 Rd8 28.h4 exf5
29.hxg5 Bxg5 30.gxf5 Bxe3 31.Rxe3 Rg8 32.Rg3 Qh4+ 33.Qh2 Qxh2+ 34.Kxh2 
Rxg3 35.Rxg3 Rg8 36.Bb3 Rxg3 37.Kxg3 Kg7 38.Bd5 Bd7 39.Nd1 Kf6 40.Bg8 h6 
41.Ne3 Kg5 42.Nc4 Nxc4 43.Bxc4 Bc6 44.Kf3 b5 45.Be6 c4 46.a4 bxa4 47.Bxc4 
h5 48.Ke3 h4 49.Bf1 Bb7 50.Kd4 Kf6 51.Bg2 Bc6 52.c4 Bb7 53.c5 dxc5+ 54.
Kxc5 Ke5 55.Kb4 h3 56.Bxh3 Bxe4 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "15"]
[White "Rossetto, Hector Decio"]
[Black "Alvarez del Monte, Jose Luis"]
[Result "1-0"]
[ECO "A96"]
[EventDate "1969.03.22"]
[PlyCount "63"]

1.c4 f5 2.d4 Nf6 3.Nf3 e6 4.g3 Be7 5.Bg2 O-O 6.O-O d6 7.Nc3 a5 8.b3 Na6 9.
Bb2 c6 10.Rc1 Nc7 11.Qc2 Rb8 12.e4 fxe4 13.Nxe4 Nxe4 14.Qxe4 Bf6 15.Qc2 
Bd7 16.Nd2 e5 17.dxe5 Bxe5 18.Bxe5 dxe5 19.Qc3 Bf5 20.Nf3 e4 21.Nh4 Bg4 
22.Bxe4 Ne6 23.f3 Nd4 24.Qd3 Bh5 25.Rcd1 c5 26.Bxh7+ Kh8 27.Ng6+ Bxg6 28.
Bxg6 Qf6 29.Qe4 Rbd8 30.Qg4 Nxf3+ 31.Kh1 Kg8 32.Qh5 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "15"]
[White "Schweber, Samuel"]
[Black "Rocha, Antonio Cavilhas"]
[Result "1/2-1/2"]
[ECO "C69"]
[EventDate "1969.03.22"]
[PlyCount "130"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O f6 6.d4 Bg4 7.c3 Bd6 8.Be3 
Qe7 9.Nbd2 Nh6 10.Qc2 Nf7 11.h3 Bd7 12.c4 c5 13.dxc5 Bxc5 14.Bxc5 Qxc5 15.
Rfd1 O-O 16.Qc3 Be6 17.Ne1 Rad8 18.Nd3 Qd4 19.Qxd4 Rxd4 20.Nc5 Bc8 21.Ncb3
Rd3 22.Nf1 Rfd8 23.Rxd3 Rxd3 24.Ne3 Nd6 25.Nd5 Nxe4 26.Ne7+ Kf8 27.Nxc8 
Rd8 28.Re1 Ng5 29.Na7 Ra8 30.f4 Nf7 31.Nc5 Rxa7 32.Ne6+ Kg8 33.Rd1 exf4 
34.Rd7 b6 35.b3 g5 36.Rxc7 Rxc7 37.Nxc7 Ne5 38.Nxa6 Kf7 39.c5 bxc5 40.Nxc5
f5 41.a4 Nc6 42.Nd3 Ke6 43.b4 Kd5 44.Kf2 Kd4 45.b5 Na5 46.Ke2 Nc4 47.h4 
gxh4 48.Nxf4 Kc5 49.Ne6+ Kb4 50.Nd4 Kxa4 51.Kf3 Nd6 52.Kf4 Nxb5 53.Nxf5 
Kb4 54.Nxh4 Kc4 55.Nf3 Nc3 56.Ng5 Nd5+ 57.Ke4 Nf6+ 58.Ke5 Ng4+ 59.Kf4 h5 
60.Ke4 Kc3 61.Nf3 Kc2 62.Ne5 Nxe5 63.Kxe5 Kd3 64.Kf4 Ke2 65.Kg3 Kf1 
1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "15"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Silva Sanchez, Carlos"]
[Result "1-0"]
[ECO "B15"]
[EventDate "1969.03.22"]
[PlyCount "47"]

1.e4 c6 2.d4 d5 3.Nc3 g6 4.Bg5 Bg7 5.Qd2 Qa5 6.exd5 cxd5 7.Bb5+ Bd7 8.Nxd5
Qxd2+ 9.Bxd2 Bxb5 10.Nc7+ Kd7 11.Nxb5 a6 12.Nc3 Nc6 13.O-O-O Nf6 14.Nf3 
Rhc8 15.d5 Nb4 16.Rhe1 Nfxd5 17.a3 a5 18.Kb1 Ke8 19.axb4 Nb6 20.bxa5 Nc4 
21.Nb5 Kf8 22.Bb4 Bf6 23.Rd7 Nxa5 24.Bxe7+ 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "16"]
[White "Alvarez del Monte, Jose Luis"]
[Black "Garcia Toledo, Pedro"]
[Result "1/2-1/2"]
[ECO "C03"]
[EventDate "1969.03.22"]
[PlyCount "102"]

1.e4 e6 2.d4 d5 3.Nd2 Nc6 4.c3 e5 5.dxe5 dxe4 6.Qe2 Nxe5 7.Nxe4 Qe7 8.Be3 
Bf5 9.Nc5 O-O-O 10.Qb5 c6 11.Qa4 b6 12.Ba6+ Kb8 13.Nf3 Nxf3+ 14.gxf3 Bc8 
15.O-O bxc5 16.Rfd1 Bxa6 17.Qxa6 g5 18.Bxc5 Rxd1+ 19.Rxd1 Qxc5 20.Rd8+ Kc7
21.Qc8+ Kb6 22.Rxf8 Qd6 23.Rxg8 Rxg8 24.Qxg8 Qf4 25.Kg2 h5 26.h3 Kb7 27.
Qe8 Qf5 28.Qe7+ Kb8 29.Qe8+ Kc7 30.Qe7+ Kb8 31.Qe4 Qf6 32.Qb4+ Kc8 33.Qd4 
Qe6 34.Qxa7 g4 35.Qa8+ Kc7 36.Qa7+ Kc8 37.Qa8+ Kc7 38.Qa5+ Kd6 39.Qxh5 
gxh3+ 40.Qxh3 Qxa2 41.Qh6+ Kc5 42.Qf8+ Kb5 43.Qb4+ Ka6 44.Qa3+ Qxa3 45.
bxa3 Kb5 46.Kg3 Ka4 47.Kf4 Kxa3 48.Ke5 Kb3 49.Kd6 Kxc3 50.Kxc6 Kd3 51.Kd6 
Kd4 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "16"]
[White "Garcia, Raimundo"]
[Black "Schweber, Samuel"]
[Result "1-0"]
[ECO "A34"]
[EventDate "1969.03.22"]
[PlyCount "113"]

1.Nf3 c5 2.c4 Nf6 3.Nc3 d5 4.cxd5 Nxd5 5.g3 Nc6 6.Bg2 Nc7 7.O-O e5 8.b3 
Be7 9.Bb2 Be6 10.Rc1 b6 11.e3 O-O 12.d4 exd4 13.exd4 cxd4 14.Ne2 Bd5 15.
Nf4 Qd6 16.Nxd5 Nxd5 17.Nxd4 Nxd4 18.Qxd4 Bf6 19.Qxd5 Qxd5 20.Bxd5 Bxb2 
21.Rc2 Rad8 22.Bxf7+ Rxf7 23.Rxb2 b5 24.Rc1 Rfd7 25.Rc5 a6 26.Rc6 Rd6 27.
Rbc2 b4 28.h4 Kf7 29.Rxd6 Rxd6 30.Rc7+ Kf6 31.Rb7 a5 32.Rb5 Ra6 33.Kf1 Ra7
34.Ke2 Ke6 35.h5 h6 36.Kd3 Kd6 37.f4 Rc7 38.g4 Ra7 39.g5 Kc6 40.Rf5 hxg5 
41.fxg5 Rd7+ 42.Kc4 Re7 43.Rxa5 Re4+ 44.Kd3 Rh4 45.g6 Rh3+ 46.Ke4 Rh4+ 47.
Kf3 Kd6 48.Kg3 Rh1 49.Rb5 Rg1+ 50.Kf3 Rf1+ 51.Ke3 Ra1 52.Rxb4 Rxa2 53.Rb7 
Rh2 54.Rxg7 Rxh5 55.Rb7 Rg5 56.g7 Ke6 57.Ra7 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "16"]
[White "Mendivil Salinas, Ismael"]
[Black "Rossetto, Hector Decio"]
[Result "0-1"]
[ECO "C80"]
[EventDate "1969.03.22"]
[PlyCount "74"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Nxe4 6.d4 b5 7.Bb3 d5 8.Nxe5 
Nxe5 9.dxe5 Be6 10.Be3 Nc5 11.Nd2 Be7 12.f4 d4 13.Bf2 Nxb3 14.axb3 Qd5 15.
Bg3 Bf5 16.Nf3 c5 17.b4 O-O 18.Bh4 Bxh4 19.Nxh4 Be4 20.bxc5 Qxc5 21.Rf2 
Rac8 22.Nf3 Rfd8 23.Ne1 b4 24.Qe2 Bb7 25.Nd3 Qb6 26.f5 f6 27.e6 b3 28.cxb3
Qxb3 29.Ra3 Qd5 30.h3 Rc7 31.b4 Rc3 32.Ra5 Qb3 33.Nc5 d3 34.Qh5 Rc1+ 35.
Kh2 Qc3 36.Qf7+ Kh8 37.e7 Qe5+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "16"]
[White "Najdorf, Miguel"]
[Black "Bronstein, Luis Marcos"]
[Result "1-0"]
[ECO "A24"]
[EventDate "1969.03.22"]
[PlyCount "55"]

1.c4 e5 2.Nc3 Nf6 3.g3 c6 4.Nf3 d6 5.Bg2 g6 6.O-O Bg7 7.d3 O-O 8.Rb1 Re8 
9.e4 Na6 10.h3 Nc7 11.d4 exd4 12.Nxd4 Ne6 13.Be3 Nc5 14.Qc2 Qe7 15.Rbe1 a5
16.f4 Bd7 17.Bf2 Nh5 18.Qd2 Bh6 19.Kh2 a4 20.Qd1 Ne6 21.Nf5 Qf8 22.Nxh6+ 
Qxh6 23.Be3 f5 24.Qxd6 Nf6 25.Kg1 Qf8 26.Rd1 Qxd6 27.Rxd6 fxe4 28.f5 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "16"]
[White "Quinteros, Miguel Angel"]
[Black "Camara, Helder"]
[Result "1-0"]
[ECO "D79"]
[EventDate "1969.03.22"]
[PlyCount "99"]

1.c4 c6 2.Nf3 d5 3.g3 g6 4.Bg2 Bg7 5.cxd5 cxd5 6.O-O Nc6 7.d4 Nf6 8.Nc3 
O-O 9.Ne5 e6 10.Nxc6 bxc6 11.Na4 Nd7 12.Be3 e5 13.Rc1 Bb7 14.b3 e4 15.Qd2 
Re8 16.Rc2 Qe7 17.Rfc1 f5 18.Qa5 Rec8 19.Qd2 Bf6 20.f3 exf3 21.exf3 Re8 
22.Kf2 Qg7 23.Rd1 Re6 24.Bg5 Bxg5 25.Qxg5 Rae8 26.Bf1 Qf8 27.Re2 h6 28.Qd2
Rxe2+ 29.Bxe2 Kg7 30.Bf1 f4 31.Qxf4 Qxf4 32.gxf4 Nf6 33.Re1 Rxe1 34.Kxe1 
Nh5 35.Nc5 Bc8 36.Ba6 Bxa6 37.Nxa6 Nxf4 38.Nb4 Ne6 39.Nxc6 a6 40.Kd2 Kf6 
41.Kc3 Kg5 42.Kb4 Kf4 43.Ka5 Kxf3 44.Kxa6 g5 45.Kb6 h5 46.a4 g4 47.a5 g3 
48.hxg3 Kxg3 49.a6 h4 50.a7 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "16"]
[White "Riego Prieto, Victorio"]
[Black "Rodriguez Vargas, Orestes"]
[Result "0-1"]
[ECO "B86"]
[EventDate "1969.03.22"]
[PlyCount "84"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 e6 7.Bb3 Be7 8.g4 O-O
9.f3 d5 10.g5 Ne8 11.exd5 e5 12.Nde2 Bxg5 13.Bxg5 Qxg5 14.Qd2 Qxd2+ 15.
Kxd2 Nd7 16.a3 h6 17.Rae1 Nd6 18.Ng3 f5 19.Kc1 Kf7 20.Rhg1 g6 21.Re2 Kf6 
22.Reg2 Kf7 23.h4 b5 24.Nge2 Rg8 25.f4 Bb7 26.h5 g5 27.fxe5 Nxe5 28.Nd4 
Kf6 29.Rf2 f4 30.Ne6 Rac8 31.Re1 Rge8 32.Kb1 Nec4 33.Rg1 Nxa3+ 34.Ka1 Nac4
35.Ne2 Ne4 36.Rh2 f3 37.Bxc4 Rxc4 38.N2d4 Bxd5 39.b3 Rc3 40.Ng7 Kxg7 41.
Nf5+ Kh7 42.Rd1 Be6 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "16"]
[White "Rocha, Antonio Cavilhas"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "0-1"]
[ECO "B43"]
[EventDate "1969.03.22"]
[PlyCount "60"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3 Qc7 6.Be2 Nf6 7.a3 b5 8.O-O Bb7
9.Bf3 d6 10.g3 Nbd7 11.Bg2 Be7 12.f4 O-O 13.g4 d5 14.exd5 Nxd5 15.Nxd5 
Bxd5 16.Bxd5 exd5 17.Nf5 Bc5+ 18.Kg2 Rfe8 19.b4 Bf8 20.Rf2 g6 21.Ne3 d4 
22.Nd5 Qd6 23.Qf3 Rad8 24.g5 Bg7 25.Bb2 Nf8 26.Nf6+ Bxf6 27.gxf6 Re3 28.
Qd1 Qxf6 29.Qd2 Qf5 30.Rd1 Ne6 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "16"]
[White "Rubinetti, Jorge Alberto"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]
[ECO "A14"]
[EventDate "1969.03.22"]
[PlyCount "81"]

1.Nf3 Nf6 2.c4 b6 3.g3 Bb7 4.Bg2 e6 5.O-O Be7 6.b3 c5 7.Bb2 O-O 8.e3 d5 9.
Qe2 Nc6 10.Rd1 Qc7 11.Nc3 dxc4 12.bxc4 Rad8 13.d3 Qb8 14.Ng5 Nb4 15.a3 
Bxg2 16.Kxg2 Qb7+ 17.Kg1 Nc6 18.f4 Nd7 19.Qh5 h6 20.Nge4 Nf6 21.Qe2 Nxe4 
22.Nxe4 f5 23.Nf2 Bf6 24.Bxf6 Rxf6 25.Qf3 Qc7 26.h4 e5 27.h5 Kh7 28.Kh2 
Re8 29.Rg1 exf4 30.gxf4 Rfe6 31.Rae1 Nd4 32.Qh3 Nc2 33.Qxf5+ Kh8 34.Rg6 
Rxg6 35.Qxg6 Rf8 36.Re2 Nxe3 37.Nh3 Qe7 38.Kg1 Rf6 39.Qg3 Nf5 40.Rxe7 Nxg3
41.Re5 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "16"]
[White "Silva Sanchez, Carlos"]
[Black "Mecking, Henrique"]
[Result "0-1"]
[ECO "E63"]
[EventDate "1969.03.22"]
[PlyCount "81"]

1.d4 g6 2.g3 Bg7 3.Nf3 Nf6 4.Bg2 O-O 5.O-O d6 6.c4 Nc6 7.Nc3 a6 8.a3 Bg4 
9.d5 Bxf3 10.exf3 Na5 11.Qa4 b6 12.Ne4 Nb7 13.Rb1 Nxe4 14.fxe4 a5 15.Qc2 
a4 16.Bd2 Qd7 17.Bc3 Nc5 18.Rfe1 Bxc3 19.Qxc3 b5 20.e5 bxc4 21.Qxc4 Rab8 
22.Re2 Qb5 23.Qxb5 Rxb5 24.exd6 exd6 25.Rd1 Rfb8 26.Rdd2 Rb3 27.Be4 Re8 
28.Bb1 Kf8 29.Kf1 f5 30.Rxe8+ Kxe8 31.Ke2 Rb5 32.Ba2 h5 33.h4 Ke7 34.Bc4 
Rb8 35.Kd1 Kf6 36.Kc2 Re8 37.b4 axb3+ 38.Bxb3 Ra8 39.Re2 Rxa3 40.Bc4 Ne4 
41.Bb3 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "17"]
[White "Bronstein, Luis Marcos"]
[Black "Quinteros, Miguel Angel"]
[Result "0-1"]
[ECO "E92"]
[EventDate "1969.03.22"]
[PlyCount "106"]

1.d4 Nf6 2.c4 c5 3.d5 d6 4.Nc3 g6 5.e4 Bg7 6.Be2 O-O 7.Nf3 e5 8.Bg5 h6 9.
Bh4 Qc7 10.O-O Nh7 11.Ne1 h5 12.f3 Bh6 13.Bf2 Qe7 14.Kh1 h4 15.Nc2 Bg5 16.
Ne3 Nf6 17.Re1 Nh5 18.a3 Bf4 19.Nf1 Kg7 20.b4 b6 21.bxc5 bxc5 22.Rb1 Qg5 
23.Bd3 Rh8 24.Rb2 Nd7 25.Nb5 Rb8 26.Qb1 Ndf6 27.Nxd6 Ng3+ 28.Kg1 Bh3 29.
gxh3 Ngxe4+ 30.Kh1 Nxf2+ 31.Rxf2 Rxb1 32.Rxb1 e4 33.Nxe4 Nxe4 34.fxe4 Rb8 
35.Rb5 Rxb5 36.cxb5 Qe5 37.a4 g5 38.Bc2 Qc3 39.Kg2 c4 40.Bd1 Qd4 41.Bc2 c3
42.Re2 f6 43.Kf3 Kf7 44.Kg2 Ke7 45.Kf3 Kd6 46.Kg2 Kc5 47.Kf3 Kb4 48.Ne3 
Bxe3 49.Rxe3 Qd2 50.Re2 Qf4+ 51.Kg2 g4 52.hxg4 h3+ 53.Kg1 Qf3 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "17"]
[White "Canobra, Juvenal"]
[Black "Rubinetti, Jorge Alberto"]
[Result "1/2-1/2"]
[ECO "B86"]
[EventDate "1969.03.22"]
[PlyCount "37"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Bc4 Be7 7.Qe2 O-O 8.Bb3 
Na6 9.a3 Nc5 10.Ba2 d5 11.exd5 exd5 12.O-O Re8 13.Bg5 Nce4 14.Nxe4 dxe4 
15.Qc4 Qd5 16.Qxd5 Nxd5 17.Bxe7 Nxe7 18.Nb5 Rd8 19.Rad1 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "17"]
[White "Garcia Toledo, Pedro"]
[Black "Mendivil Salinas, Ismael"]
[Result "1-0"]
[ECO "A68"]
[EventDate "1969.03.22"]
[PlyCount "69"]

1.e4 g6 2.d4 d6 3.c4 Nf6 4.Nc3 Bg7 5.Be2 O-O 6.f4 c5 7.d5 e6 8.Nf3 exd5 9.
cxd5 b5 10.e5 Ng4 11.h3 b4 12.Ne4 Nh6 13.Nxd6 Nd7 14.O-O Nb6 15.Be3 Nd7 
16.Qd2 Qb6 17.Rac1 a5 18.g4 f6 19.Nxc8 Raxc8 20.e6 Nb8 21.f5 g5 22.d6 Rfd8
23.d7 Rc7 24.e7 Rcxd7 25.exd8=Q+ Rxd8 26.Qc2 Qd6 27.Kg2 Rc8 28.Rfd1 Qc7 
29.Bc4+ Kh8 30.Be6 Re8 31.Qxc5 Qb7 32.Qd5 Qa6 33.Qc4 Qb7 34.Qc7 Qb5 35.Rd8
1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "17"]
[White "Mecking, Henrique"]
[Black "Rocha, Antonio Cavilhas"]
[Result "1-0"]
[ECO "C69"]
[EventDate "1969.03.22"]
[PlyCount "47"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Bxc6 dxc6 5.O-O f6 6.d4 Bg4 7.c3 Bd6 8.Be3 
Qe7 9.Nbd2 Nh6 10.h3 Bd7 11.Qb3 b6 12.dxe5 fxe5 13.Nc4 Nf7 14.Rfd1 Bc5 15.
Bxc5 Qxc5 16.Rxd7 Kxd7 17.Nxb6+ Qxb6 18.Qxf7+ Kc8 19.Nxe5 Qxb2 20.Qd7+ Kb8
21.Qd1 Qxc3 22.Rb1+ Ka7 23.Qd4+ Qxd4 24.Nxc6# 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "17"]
[White "Panno, Oscar"]
[Black "Riego Prieto, Victorio"]
[Result "1-0"]
[ECO "E68"]
[EventDate "1969.03.22"]
[PlyCount "81"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.g3 d6 5.Bg2 Nbd7 6.Nf3 e5 7.O-O O-O 8.e4 Re8 
9.h3 h6 10.Be3 exd4 11.Nxd4 Nc5 12.Qc2 a5 13.Rad1 Bd7 14.Rfe1 Qc8 15.Kh2 
Nh7 16.f4 Nf8 17.Nd5 Qd8 18.Bf2 h5 19.Nf3 b6 20.Bd4 Be6 21.Bxg7 Kxg7 22.
Qc3+ f6 23.e5 Bxd5 24.Rxd5 Nh7 25.exd6 Ne4 26.d7 Re7 27.Rxe4 Rxe4 28.Nd4 
Rxd4 29.Rxd4 Rb8 30.Qe3 f5 31.Qe5+ Nf6 32.Rd2 Kf8 33.Bc6 h4 34.gxh4 Qe7 
35.Qxc7 Rd8 36.Qe5 Qxe5 37.fxe5 Nh5 38.Rd6 Nf4 39.Kg3 Nh5+ 40.Kf3 Kf7 41.
Bd5+ 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "17"]
[White "Rodriguez Vargas, Orestes"]
[Black "Alvarez del Monte, Jose Luis"]
[Result "1-0"]
[ECO "E51"]
[EventDate "1969.03.22"]
[PlyCount "59"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 Nc6 7.O-O a6 8.Qe2 dxc4
9.Bxc4 Bd6 10.e4 e5 11.dxe5 Nxe5 12.Nxe5 Bxe5 13.Bg5 c6 14.Kh1 h6 15.Bh4 
Qc7 16.Bxf6 Bxf6 17.f4 Bd4 18.e5 Bf5 19.Qh5 Qc8 20.h3 Bxc3 21.bxc3 b5 22.
Bb3 Kh7 23.Rad1 g6 24.Qf3 Be6 25.Rd6 Bxb3 26.axb3 c5 27.Qd5 Ra7 28.f5 gxf5
29.Qd3 c4 30.Qe3 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "17"]
[White "Rossetto, Hector Decio"]
[Black "Silva Sanchez, Carlos"]
[Result "1/2-1/2"]
[ECO "D01"]
[EventDate "1969.03.22"]
[PlyCount "114"]

1.d4 Nf6 2.Nc3 d5 3.Bg5 Bf5 4.e3 c6 5.Bd3 Bxd3 6.cxd3 Nbd7 7.Nf3 e6 8.O-O 
Be7 9.Qb3 Qb6 10.Qc2 O-O 11.Ne5 Rae8 12.f4 Nxe5 13.Na4 Qd8 14.dxe5 Nd7 15.
Bxe7 Qxe7 16.b4 d4 17.e4 Rc8 18.Nc5 b6 19.Nxd7 Qxd7 20.Qc4 c5 21.b5 a5 22.
Rf3 Qc7 23.Raf1 Rfe8 24.a4 Re7 25.Rg3 Kh8 26.Rh3 g5 27.Rh5 Rg8 28.Qc1 Rd7 
29.Qe1 c4 30.dxc4 Rg7 31.fxg5 Qxc4 32.Qf2 d3 33.Qe3 d2 34.Rd1 Qd4 35.Kf2 
Rg8 36.Ke2 Qxe3+ 37.Kxe3 Rc8 38.g6 fxg6 39.Rh4 Rc3+ 40.Ke2 Rc4 41.Rf4 Rxa4
42.Rxd2 Rxd2+ 43.Kxd2 Rb4 44.Rf6 Rxb5 45.Rxe6 Kg8 46.Re7 a4 47.e6 Re5 48.
Kd3 a3 49.Re8+ Kg7 50.e7 Kf6 51.Ra8 Rxe7 52.Rxa3 Ke5 53.Rb3 Re6 54.Ke3 Rc6
55.h4 Rc5 56.Rxb6 Rc3+ 57.Kf2 Kxe4 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "17"]
[White "Schweber, Samuel"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "B41"]
[EventDate "1969.03.22"]
[PlyCount "79"]

1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.g3 d5 6.e5 Nc6 7.Nxc6 bxc6 8.Bd3 
Qc7 9.Qe2 Ne7 10.Nd2 Bb7 11.O-O h5 12.c4 c5 13.b3 Nc6 14.cxd5 Nd4 15.Qe3 
Bxd5 16.Bb2 Be7 17.Rac1 Qa7 18.Ne4 Rd8 19.Bxd4 cxd4 20.Qf4 Bxe4 21.Qxe4 g6
22.Rc6 Qd7 23.Rfc1 Ba3 24.R1c4 a5 25.Qf4 O-O 26.Rc7 Qe8 27.Rxd4 Rxd4 28.
Qxd4 Qd8 29.Rd7 Qc8 30.Bc4 Bb2 31.Qa7 Bxe5 32.Kf1 Qc6 33.Qb7 Qxb7 34.Rxb7 
Rd8 35.Ke2 Bc3 36.Bd3 Bb4 37.Rb5 Ra8 38.Be4 Ra7 39.Bb7 Kf8 40.Be4 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "17"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Garcia, Raimundo"]
[Result "0-1"]
[ECO "C19"]
[EventDate "1969.03.22"]
[PlyCount "58"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 Ne7 5.a3 Bxc3+ 6.bxc3 c5 7.Nf3 b6 8.Bb5+ 
Bd7 9.Bxd7+ Nxd7 10.O-O Rc8 11.a4 Qc7 12.Ba3 O-O 13.Re1 Nf5 14.Qd3 Rfe8 
15.g4 Ne7 16.Ng5 Ng6 17.Qf3 Rf8 18.Qd3 Qc6 19.h4 h6 20.h5 hxg5 21.hxg6 
fxg6 22.Qxg6 Rf4 23.Qxg5 Rcf8 24.Re2 Re4 25.Rxe4 dxe4 26.Bc1 cxd4 27.Bb2 
e3 28.fxe3 Qf3 29.cxd4 Qg3+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "18"]
[White "Alvarez del Monte, Jose Luis"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "B73"]
[EventDate "1969.03.22"]
[PlyCount "76"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.Be3 O-O 8.O-O 
d6 9.Kh1 Bd7 10.f4 Rc8 11.Nxc6 Bxc6 12.Bf3 Qc7 13.Bd4 Rfd8 14.Qe1 b5 15.a3
a5 16.Nd1 Qb7 17.Bxf6 Bxf6 18.c3 Bg7 19.Rc1 e6 20.f5 Re8 21.fxg6 hxg6 22.
Qh4 Qe7 23.Qxe7 Rxe7 24.Ne3 Bh6 25.Rce1 b4 26.Nc4 bxc3 27.bxc3 Bd7 28.Nxd6
Rxc3 29.a4 Bg7 30.Bd1 Bc6 31.Rf3 Rc1 32.Rff1 Bc3 33.Re2 Bxa4 34.Re3 Be5 
35.Rd3 Rd7 36.Kg1 Rxd6 37.Rxd6 Bxd6 38.Bxa4 Bc5+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "18"]
[White "Camara, Helder"]
[Black "Bronstein, Luis Marcos"]
[Result "0-1"]
[ECO "A57"]
[EventDate "1969.03.22"]
[PlyCount "102"]

1.d4 Nf6 2.Nf3 c5 3.d5 b5 4.a4 Bb7 5.c4 Qa5+ 6.Bd2 b4 7.Qc2 d6 8.Bg5 Nbd7 
9.Nbd2 g6 10.b3 Bg7 11.Ra2 Qc7 12.a5 a6 13.h3 O-O-O 14.e4 Kb8 15.g3 Rde8 
16.Bg2 e5 17.Kd1 Ng8 18.Ne1 Bh6 19.h4 f6 20.Bxh6 Nxh6 21.Bh3 Rhf8 22.Ndf3 
Bc8 23.Nd3 f5 24.Ng5 Nf6 25.f3 fxe4 26.fxe4 Nhg4 27.Qe2 h6 28.Nf3 Nxe4 29.
Qxe4 Bf5 30.Qe1 e4 31.Nxb4 Qb7 32.Nh2 Nxh2 33.Nc6+ Ka8 34.Rhxh2 Bxh3 35.
Kc2 Bd7 36.Rd2 e3 37.Re2 Bxc6 38.dxc6 Qxc6 39.Ra1 Qe4+ 40.Kb2 Rf3 41.Rd1 
Qe5+ 42.Ka2 Re6 43.Qh1 Qe4 44.Rf1 Ref6 45.Rfe1 d5 46.cxd5 Ka7 47.Qh3 R6f5 
48.h5 g5 49.Rc1 Rf2 50.Rcc2 Qd3 51.Qg4 Rxe2 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "18"]
[White "Garcia, Raimundo"]
[Black "Mecking, Henrique"]
[Result "1/2-1/2"]
[ECO "B06"]
[EventDate "1969.03.22"]
[PlyCount "81"]

1.d4 g6 2.e4 Bg7 3.c3 d5 4.Nd2 dxe4 5.Nxe4 Qd5 6.Qf3 Nc6 7.Nc5 Nf6 8.Qxd5 
Nxd5 9.Bb5 O-O 10.Nf3 Na5 11.O-O b6 12.Nb3 c6 13.Be2 Bf5 14.Ne5 Nxb3 15.
axb3 Bxe5 16.dxe5 a5 17.Bh6 Rfd8 18.Rfc1 f6 19.exf6 exf6 20.Bd2 g5 21.Bf3 
g4 22.Bxd5+ Rxd5 23.Be3 b5 24.b4 a4 25.Rd1 Rad8 26.Rxd5 Rxd5 27.f3 h5 28.
Bd4 Kf7 29.Kf2 Bc2 30.Ke3 gxf3 31.gxf3 Rf5 32.Re1 Bb3 33.Kf2 Bd5 34.Re3 h4
35.Bc5 Rg5 36.Bd6 Be6 37.Bc5 Bc4 38.Re4 h3 39.Rg4 Rf5 40.Rh4 Rd5 41.Bd4 
1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "18"]
[White "Mendivil Salinas, Ismael"]
[Black "Rodriguez Vargas, Orestes"]
[Result "0-1"]
[ECO "B84"]
[EventDate "1969.03.22"]
[PlyCount "85"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e6 7.Nb3 Be7 8.O-O 
Nbd7 9.Be3 b5 10.a3 Bb7 11.f3 O-O 12.Kh1 Qc7 13.Rc1 Rfd8 14.Qe1 Rac8 15.
Qg3 d5 16.Qxc7 Rxc7 17.e5 Ne8 18.f4 Rdc8 19.Nd4 g6 20.Nd1 Bc5 21.c3 Nb6 
22.Bg1 Nc4 23.Rc2 Ng7 24.g4 Rf8 25.Bf3 f6 26.exf6 Rxf6 27.Bg2 Bd6 28.Rcf2 
Rcf7 29.Ne2 Rf8 30.h4 h5 31.g5 R6f7 32.Kh2 Nf5 33.Kh3 Bc8 34.Bh1 e5 35.Kh2
e4 36.Ng3 Nfe3 37.Nxe3 Nxe3 38.Re1 Ng4+ 39.Kg2 Nxf2 40.Bxf2 Rxf4 41.Re2 
Rxf2+ 42.Rxf2 Bh3+ 43.Kxh3 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "18"]
[White "Najdorf, Miguel"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "1-0"]
[ECO "A29"]
[EventDate "1969.03.22"]
[PlyCount "59"]

1.c4 e5 2.Nc3 Nf6 3.Nf3 Nc6 4.g3 d5 5.cxd5 Nxd5 6.Bg2 Nb6 7.O-O Be7 8.d3 
O-O 9.a3 Bg4 10.b4 a6 11.h3 Bf5 12.Bb2 Qd7 13.Kh2 Rad8 14.Rc1 Bf6 15.Nd2 
Nd4 16.Nce4 c6 17.Nxf6+ gxf6 18.Ne4 Qe7 19.e3 Ne6 20.Qf3 Bxe4 21.Qxe4 Ng5 
22.Qg4 Qd7 23.Qh5 Qxd3 24.f4 Ne6 25.fxe5 Qxe3 26.exf6 Rd2 27.Rce1 Nd5 28.
Bc1 Rxg2+ 29.Kxg2 Nxf6 30.Qf5 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "18"]
[White "Quinteros, Miguel Angel"]
[Black "Schweber, Samuel"]
[Result "0-1"]
[ECO "A42"]
[EventDate "1969.03.22"]
[PlyCount "94"]

1.c4 g6 2.d4 Bg7 3.Nc3 d6 4.e4 e5 5.dxe5 dxe5 6.Qxd8+ Kxd8 7.f4 exf4 8.
Bxf4 Bxc3+ 9.bxc3 Be6 10.Nf3 Nd7 11.O-O-O Nf6 12.Ng5 h6 13.e5 Nh5 14.Nxe6+
fxe6 15.Be3 Ke7 16.Bd3 g5 17.Be4 c6 18.Rd2 Rac8 19.Rhd1 Rc7 20.g3 c5 21.
Rxd7+ Rxd7 22.Bxc5+ Kd8 23.Rxd7+ Kxd7 24.Bxb7 a5 25.Bd6 Ng7 26.c5 Ne8 27.
c6+ Kd8 28.Kb2 Rh7 29.Kb3 Rf7 30.Ka4 Rf2 31.a3 Rd2 32.Kxa5 Rxh2 33.g4 h5 
34.gxh5 g4 35.h6 Rxh6 36.Kb6 Rh7 37.a4 Nc7 38.a5 g3 39.a6 g2 40.Bc5 Rh1 
41.c4 g1=Q 42.Bxg1 Rxg1 43.a7 Ra1 44.a8=Q+ Nxa8+ 45.Bxa8 Rxa8 46.Kb7 Rc8 
47.Kb6 Rb8+ 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "18"]
[White "Riego Prieto, Victorio"]
[Black "Canobra, Juvenal"]
[Result "0-1"]
[ECO "B72"]
[EventDate "1969.03.22"]
[PlyCount "136"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2 g6 7.Be3 Bg7 8.h4 h5
9.f3 Qa5 10.Qd2 Bd7 11.O-O-O Rc8 12.Kb1 Ne5 13.Nb3 Qc7 14.Nb5 Bxb5 15.
Bxb5+ Nfd7 16.Bd4 O-O 17.c3 a6 18.Be2 Nc4 19.Bxc4 Qxc4 20.Bxg7 Kxg7 21.Qg5
Nf6 22.Nd4 e6 23.Nb3 d5 24.exd5 Nxd5 25.Rhe1 Nf6 26.Rd4 Qc7 27.g4 Qg3 28.
Rf1 Rcd8 29.Nc5 Rxd4 30.cxd4 Qg2 31.Qc1 hxg4 32.fxg4 Qxg4 33.Qe3 Rd8 34.h5
Nxh5 35.Qe5+ Kg8 36.Qc7 Rf8 37.Qd6 Qg2 38.Rc1 Nf6 39.Qe7 Qf3 40.a3 b6 41.
Nxa6 Qd3+ 42.Ka1 Nd5 43.Qh4 Re8 44.Nc7 Nxc7 45.Rxc7 Kg7 46.Rc3 Qf1+ 47.Ka2
Rh8 48.Qe4 Qb5 49.Rb3 Qc4 50.Qe5+ f6 51.Qe3 g5 52.d5 Qxd5 53.Qxb6 Rh3 54.
a4 g4 55.Qb7+ Qxb7 56.Rxb7+ Kg6 57.a5 Rh8 58.Rc7 f5 59.b4 g3 60.Rc1 f4 61.
Rg1 Kf5 62.a6 Kg4 63.b5 Ra8 64.Kb3 f3 65.Ra1 f2 66.a7 Rxa7 67.Rxa7 f1=Q 
68.Rg7+ Kh5 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "18"]
[White "Rocha, Antonio Cavilhas"]
[Black "Rossetto, Hector Decio"]
[Result "1/2-1/2"]
[ECO "C05"]
[EventDate "1969.03.22"]
[PlyCount "29"]

1.e4 e6 2.d4 d5 3.Nd2 Nf6 4.e5 Nfd7 5.Bd3 c5 6.c3 Nc6 7.Ngf3 Qb6 8.O-O Be7
9.dxc5 Nxc5 10.Bc2 Qc7 11.Re1 b5 12.Nb3 a5 13.Nxc5 Bxc5 14.Be3 Be7 15.Nd4 
1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "18"]
[White "Silva Sanchez, Carlos"]
[Black "Garcia Toledo, Pedro"]
[Result "1/2-1/2"]
[ECO "D31"]
[EventDate "1969.03.22"]
[PlyCount "28"]

1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4 dxe4 5.Nxe4 Bb4+ 6.Bd2 Qxd4 7.Bxb4 Qxe4+ 8.
Be2 Na6 9.Ba3 Bd7 10.Nf3 Ne7 11.O-O c5 12.Re1 Rd8 13.Bd3 Qg4 14.Re4 Qf5 
1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "19"]
[White "Canobra, Juvenal"]
[Black "Alvarez del Monte, Jose Luis"]
[Result "1/2-1/2"]
[ECO "C85"]
[EventDate "1969.03.22"]
[PlyCount "51"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Bxc6 dxc6 7.d3 Nd7 8.Nbd2
f6 9.Nc4 Nf8 10.d4 exd4 11.Nxd4 c5 12.Nb3 Qxd1 13.Rxd1 Bd7 14.a4 O-O-O 15.
Be3 Ne6 16.f3 Bc6 17.a5 Rxd1+ 18.Rxd1 Ba4 19.Ncd2 Rd8 20.Ra1 Bb5 21.c3 c4 
22.Nd4 Bc5 23.Kf2 Nxd4 24.cxd4 Bxd4 25.Bxd4 Rxd4 26.Ke1 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "19"]
[White "Garcia Toledo, Pedro"]
[Black "Rocha, Antonio Cavilhas"]
[Result "1/2-1/2"]
[ECO "E20"]
[EventDate "1969.03.22"]
[PlyCount "18"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e4 Nxe4 5.Qg4 Nxc3 6.a3 Be7 7.bxc3 O-O 8.Bh6 
Bf6 9.Nf3 d5 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "19"]
[White "Mecking, Henrique"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "B24"]
[EventDate "1969.03.22"]
[PlyCount "75"]

1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.f4 e6 6.d3 Nge7 7.Nf3 O-O 8.Rb1 d5 
9.Bd2 dxe4 10.Nxe4 b6 11.O-O Ba6 12.Re1 Qc7 13.a3 c4 14.dxc4 Bxc4 15.b3 
Ba6 16.c4 Rad8 17.Qc2 Nf5 18.Bc3 Ncd4 19.Nxd4 Nxd4 20.Qb2 Bb7 21.Red1 Bxe4
22.Bxe4 Ne2+ 23.Qxe2 Bxc3 24.Kg2 Rd6 25.Rbc1 Bf6 26.Rxd6 Qxd6 27.b4 Rc8 
28.Rc2 Be7 29.Bb7 Rd8 30.Bf3 Rc8 31.h4 Qc7 32.Qe3 a5 33.Qc3 axb4 34.axb4 
Qd6 35.c5 bxc5 36.bxc5 Rxc5 37.Qxc5 Qxc5 38.Rxc5 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "19"]
[White "Panno, Oscar"]
[Black "Mendivil Salinas, Ismael"]
[Result "1-0"]
[ECO "E54"]
[EventDate "1969.03.22"]
[PlyCount "55"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O dxc4 8.Bxc4 
cxd4 9.exd4 Qc7 10.Qe2 Bd7 11.Bg5 Rc8 12.Bb3 Bxc3 13.bxc3 Nd5 14.c4 Nf4 
15.Qe4 Ng6 16.h4 Nf8 17.Bf4 Qb6 18.Rad1 Nc6 19.c5 Qb5 20.Rb1 Nb4 21.Ne5 
Bc6 22.Qe3 Qa6 23.h5 Nd5 24.Qg3 Nxf4 25.Qxf4 Be8 26.Bc4 Qa4 27.Bb5 Bxb5 
28.Qxf7+ 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "19"]
[White "Rodriguez Vargas, Orestes"]
[Black "Silva Sanchez, Carlos"]
[Result "1-0"]
[ECO "A56"]
[EventDate "1969.03.22"]
[PlyCount "49"]

1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 Be7 6.Nf3 O-O 7.g3 Ne8 8.Bg2 g6 9.
Be3 Ng7 10.Qd2 f5 11.O-O-O Nd7 12.h4 a6 13.Bh6 fxe4 14.Ng5 Nf6 15.Ncxe4 
Ng4 16.Bxg7 Kxg7 17.Ne6+ Bxe6 18.dxe6 Qb6 19.h5 Qb4 20.Qe2 Rad8 21.hxg6 
hxg6 22.Kb1 Nh6 23.Nc3 Ng8 24.Nd5 Qa5 25.Be4 1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "19"]
[White "Rossetto, Hector Decio"]
[Black "Garcia, Raimundo"]
[Result "1/2-1/2"]
[ECO "A33"]
[EventDate "1969.03.22"]
[PlyCount "85"]

1.e4 c5 2.Nf3 e6 3.c4 Nc6 4.Nc3 Nf6 5.d4 cxd4 6.Nxd4 Bb4 7.Nxc6 dxc6 8.
Qxd8+ Kxd8 9.Bd2 e5 10.O-O-O Ke8 11.f3 Be6 12.Be2 Nd7 13.Nd5 Bxd2+ 14.Rxd2
Rc8 15.Ne3 a5 16.Nf5 Bxf5 17.exf5 Ke7 18.Re1 f6 19.Bd3 Rhd8 20.Bc2 Nc5 21.
b3 Rxd2 22.Kxd2 Rd8+ 23.Kc3 Rd4 24.Rd1 Rxd1 25.Bxd1 Kd6 26.a3 Na6 27.b4 
axb4+ 28.axb4 c5 29.b5 Nc7 30.Bc2 Ne8 31.b6 Ke7 32.Be4 Nd6 33.Bd5 Nc8 34.
Bxb7 Nxb6 35.Be4 Kd6 36.Kb3 Kc7 37.h4 Nc8 38.Bd5 Kb6 39.h5 h6 40.Be4 Nd6 
41.Bd3 Nb7 42.Be4 Nd6 43.Bd3 1/2-1/2

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "19"]
[White "Rubinetti, Jorge Alberto"]
[Black "Riego Prieto, Victorio"]
[Result "1-0"]
[ECO "B84"]
[EventDate "1969.03.22"]
[PlyCount "211"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 6.Be3 Be7 7.Be2 a6 8.f4 Qc7
9.Bf3 Nbd7 10.O-O O-O 11.Kh1 Nc5 12.Qe1 Re8 13.Qg3 Bf8 14.Rae1 Nfd7 15.a4 
b6 16.Bd2 Rb8 17.b4 Nb7 18.Be2 Nd8 19.Bd3 Bb7 20.Qh3 Be7 21.e5 Nf8 22.Ne4 
dxe5 23.fxe5 Ng6 24.Nf3 Bxe4 25.Rxe4 b5 26.axb5 axb5 27.Qg3 f5 28.exf6 
Qxg3 29.f7+ Nxf7 30.hxg3 e5 31.Re2 Bf6 32.Rfe1 Nf8 33.Bf4 Nd7 34.g4 g6 35.
Bg3 Rec8 36.Nd2 Be7 37.Ne4 Nd6 38.Nxd6 Bxd6 39.Rb1 Rc3 40.Be1 Rc7 41.Ra1 
Nf6 42.Ra6 Rd7 43.g5 e4 44.Bxe4 Nxe4 45.Rxe4 Re7 46.Rxe7 Bxe7 47.Rc6 Bxg5 
48.Bg3 Rb7 49.c3 Kf7 50.Be5 Be7 51.Rc8 Ke6 52.Bd4 Kd5 53.Bc5 Bf6 54.Bf2 
Ke4 55.Rc6 Be7 56.Kg1 Kd3 57.Bc5 Bh4 58.Kh2 Bg5 59.Kg3 Bh6 60.Bd4 Bf8 61.
Bf6 Ke4 62.Kg4 Kd5 63.Rc8 Bd6 64.Kg5 Ke6 65.Re8+ Kf7 66.Rd8 Ke6 67.Re8+ 
Kf7 68.Rh8 Ke6 69.Rg8 Bg3 70.Re8+ Kf7 71.Re3 h6+ 72.Kg4 Bd6 73.Bd4 Be7 74.
Re5 Bf6 75.Rc5 Be7 76.Rd5 Ke6 77.Re5+ Kf7 78.Kf3 Bf6 79.Rc5 Be7 80.Rd5 Ke6
81.Re5+ Kf7 82.Ke4 Bd6 83.Rd5 Ke6 84.Be3 Bf8 85.Bf4 Rb6 86.Be5 Be7 87.Bd4 
Rb7 88.Re5+ Kf7 89.Kd5 Rc7 90.Re2 h5 91.Ra2 Rc8 92.Ra7 Rd8+ 93.Kc6 Ke6 94.
Kxb5 h4 95.Kc4 Rc8+ 96.Kd3 Rb8 97.Ke4 Rb5 98.Ra6+ Kf7 99.Ra5 Rb8 100.b5 
Bd8 101.Ra7+ Ke6 102.c4 Be7 103.Ra6+ Kf7 104.Ra7 Ke6 105.b6 Rc8 106.Rxe7+ 
1-0

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "19"]
[White "Schweber, Samuel"]
[Black "Camara, Helder"]
[Result "0-1"]
[ECO "A43"]
[EventDate "1969.03.22"]
[PlyCount "112"]

1.c4 g6 2.d4 Nf6 3.Nc3 Bg7 4.e4 O-O 5.Be2 c5 6.d5 e5 7.g4 d6 8.h4 Ne8 9.
Nh3 Na6 10.h5 Nac7 11.Be3 gxh5 12.g5 f5 13.gxf6 Nxf6 14.Bxh5 b5 15.cxb5 a6
16.bxa6 Rxa6 17.Be2 Rb6 18.b3 Rb4 19.Bc4 Bg4 20.Qd3 Nh5 21.Ng1 Qf6 22.Qf1 
Nf4 23.f3 Bd7 24.a3 Ra8 25.Kd2 Rbb8 26.a4 Rf8 27.a5 Qg6 28.Rh2 Qe8 29.Nge2
Nb5 30.Nxb5 Bxb5 31.Nc3 Bxc4 32.Qxc4 Ng6 33.Rh3 Qd8 34.a6 Nh4 35.Qf1 Qf6 
36.a7 Nxf3+ 37.Ke2 Nd4+ 38.Bxd4 exd4 39.Qxf6 Bxf6 40.Nb5 d3+ 41.Kxd3 Bxa1 
42.Rg3+ Kh8 43.Rg2 Be5 44.Ra2 Rf7 45.Ra6 h5 46.Kc4 Rd7 47.b4 cxb4 48.Kxb4 
h4 49.Ra3 Kh7 50.Rh3 Bg3 51.e5 dxe5 52.d6 e4 53.Kc5 e3 54.Kc6 e2 55.Rh1 
Raxa7 56.Nxa7 Rxa7 0-1

[Event "South American zonal"]
[Site "Mar del Plata ARG"]
[Date "1969.03.??"]
[Round "19"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Quinteros, Miguel Angel"]
[Result "0-1"]
[ECO "B27"]
[EventDate "1969.03.22"]
[PlyCount "108"]

1.e4 c5 2.Nf3 Qc7 3.Be2 Nc6 4.O-O g5 5.Nxg5 Nf6 6.Nc3 Rg8 7.d3 h6 8.Nf3 e6
9.d4 cxd4 10.Nxd4 a6 11.Be3 Ne5 12.h3 b5 13.f4 Nc4 14.Bxc4 Qxc4 15.Qd3 Qc7
16.a3 Bb7 17.Nde2 d5 18.exd5 Nxd5 19.Nxd5 Bxd5 20.Rf2 Qb7 21.Kh2 Bxg2 22.
Rd1 Be4 23.Qd2 Be7 24.Rg1 Rxg1 25.Nxg1 Bh4 26.Re2 f5 27.Qd4 Kf7 28.Bf2 Bf6
29.Qd1 Rg8 30.Bg3 Qc7 31.Rd2 Rxg3 32.Rd7+ Kg6 33.Rxc7 Rg2+ 34.Kh1 Re2+ 35.
Nf3 Bxf3+ 36.Kg1 Rg2+ 37.Kf1 Bxd1 38.Kxg2 Bxb2 39.Rc6 Kf6 40.Kf2 Bxa3 41.
Ke1 Bf3 42.Rxa6 Bb4+ 43.Kf1 Be4 44.Ra2 Bd5 45.Rb2 Bc3 46.Rb1 b4 47.Ke2 Be4
48.Rc1 h5 49.h4 e5 50.fxe5+ Kxe5 51.Kf2 Kf4 52.Kg1 Kg3 53.Kf1 Bf3 54.Kg1 
Be2 0-1

