[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Cantero, Ronaldo"]
[Black "Cruz, Walter Oswaldo"]
[Result "1/2-1/2"]
[ECO "E55"]
[EventDate "1957.??.??"]
[PlyCount "145"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 d5 6.Nf3 O-O 7.O-O dxc4 8.Bxc4 
Nbd7 9.Qe2 Nb6 10.Bb3 cxd4 11.exd4 Bd7 12.Bg5 Be7 13.Rfe1 Re8 14.Rad1 Nbd5
15.Ne5 Nxc3 16.bxc3 Nd5 17.Bd2 b5 18.Qf3 Nf6 19.d5 exd5 20.Bxd5 Be6 21.
Bxa8 Qxa8 22.Qxa8 Rxa8 23.Nc6 Bf8 24.Be3 Bxa2 25.Bxa7 Nd5 26.Bd4 b4 27.
cxb4 Nxb4 28.Nxb4 Bxb4 29.Re2 Be6 30.Rb2 Ba3 31.Rbd2 Be7 32.h3 h6 33.Be3 
Bf6 34.Kh2 h5 35.g3 g6 36.Rd6 Re8 37.Rb6 Kg7 38.Rdb1 Bf5 39.R1b4 Rd8 40.g4
hxg4 41.hxg4 Bd3 42.Bh6+ Kxh6 43.Rxf6 Kg7 44.Rff4 Rc8 45.Rfd4 Ba6 46.Kg3 
Be2 47.Rb3 Rc1 48.f3 Bc4 49.Rb8 Be6 50.Kf4 Rc5 51.Kg3 Kf6 52.f4 Rc1 53.g5+
Ke7 54.Rb7+ Ke8 55.Rd2 Rc3+ 56.Kf2 Rc8 57.Rd6 Kf8 58.Ke3 Rc3+ 59.Kd2 Rc8 
60.Kd3 Bf5+ 61.Kd4 Re8 62.Kc5 Be6 63.Ra7 Rc8+ 64.Kb6 Rb8+ 65.Ka5 Rc8 66.
Rb7 Ra8+ 67.Kb5 Re8 68.Rc7 Rb8+ 69.Kc5 Re8 70.Rb6 Rd8 71.Rcb7 Rd5+ 72.Kc6 
Rd8 73.Rb8 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Cantero, Ronaldo"]
[Black "Perez Alcocer, Jose"]
[Result "1-0"]
[ECO "E16"]
[EventDate "1957.??.??"]
[PlyCount "83"]

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 c5 6.e3 Qc8 7.Nbd2 cxd4 8.exd4 
Bb4 9.Qb3 Nc6 10.d5 Bxd2+ 11.Bxd2 Na5 12.Bxa5 bxa5 13.O-O O-O 14.Rac1 Rb8 
15.Qa3 Qd8 16.Ne5 exd5 17.cxd5 Qb6 18.b3 Rfe8 19.Nc4 Qb4 20.Qxa5 Qxa5 21.
Nxa5 Bxd5 22.Bxd5 Nxd5 23.Rfd1 Nf6 24.Kf1 Rec8 25.a3 Kf8 26.b4 Ke7 27.Re1+
Kd8 28.Nc4 d5 29.Nd6 Rxc1 30.Nxf7+ Kd7 31.Rxc1 Re8 32.f4 Re3 33.Ne5+ Kd8 
34.a4 Ra3 35.a5 Rb3 36.Rc5 Rb2 37.b5 Ra2 38.a6 Rxh2 39.b6 axb6 40.a7 Ra2 
41.Nc6+ Kc7 42.Ra5 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Cantero, Ronaldo"]
[Black "Silva, Luiz Tavares da"]
[Result "1-0"]
[ECO "E64"]
[EventDate "1957.??.??"]
[PlyCount "63"]

1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 O-O 5.Bg2 d6 6.O-O c5 7.d5 Na6 8.Nc3 Nc7 
9.e4 Bg4 10.h3 Bxf3 11.Qxf3 Nd7 12.Qe2 a6 13.a4 Rb8 14.f4 Bd4+ 15.Kh2 f6 
16.h4 Kg7 17.Bh3 b5 18.cxb5 Bxc3 19.bxc3 axb5 20.axb5 Nxb5 21.Bd2 Qc7 22.
Rfb1 c4 23.Rb4 Rfc8 24.Qe3 h6 25.Be6 Rd8 26.f5 g5 27.Qe2 Ne5 28.Qh5 Qc5 
29.Kg2 Nxc3 30.Bxc3 Qe3 31.Bxe5 Qxe4+ 32.Kh2 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Cantero, Ronaldo"]
[Black "Rubio Aguado, Fernando"]
[Result "0-1"]
[ECO "E68"]
[EventDate "1957.??.??"]
[PlyCount "70"]

1.c4 Nf6 2.Nc3 g6 3.g3 Bg7 4.Bg2 O-O 5.Nf3 d6 6.d4 Nbd7 7.O-O e5 8.e4 Re8 
9.d5 Nc5 10.Ne1 a5 11.b3 Ng4 12.f3 Nh6 13.Be3 f5 14.Rb1 Nf7 15.Nd3 b6 16.
Qc2 Qf6 17.Nb5 Re7 18.Nf2 h5 19.Nd1 f4 20.Bf2 Ng5 21.Be1 Rf7 22.Kh1 Ncxe4 
23.fxe4 f3 24.Kg1 Qe7 25.Ne3 fxg2 26.Rxf7 Qxf7 27.Qxg2 Bh3 28.Qf2 Qe7 29.
Qc2 Rf8 30.Nc3 Bh6 31.Bf2 Qf7 32.Ned1 Nf3+ 33.Kh1 Nd2 34.Qd3 Bf1 35.Ne2 
Nxb1 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Cantero, Ronaldo"]
[Black "Letelier Martner, Rene"]
[Result "1-0"]
[ECO "B92"]
[EventDate "1957.??.??"]
[PlyCount "77"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5 7.Nb3 Be7 8.Bg5 
Nbd7 9.a4 O-O 10.h4 Qc7 11.g4 b6 12.Bxf6 Bxf6 13.g5 Bd8 14.Nd5 Qb8 15.f3 
Nc5 16.Nxc5 dxc5 17.c4 Be6 18.Qd2 b5 19.Kf2 bxa4 20.Rxa4 Qb7 21.Bd1 a5 22.
b3 Ra6 23.Qe3 Bxd5 24.cxd5 Qe7 25.Rc4 Rg6 26.Ke2 Bb6 27.f4 exf4 28.Qxf4 
Rd6 29.Kd3 f5 30.Bf3 fxe4+ 31.Qxe4 Qf7 32.Rf1 Re8 33.Qf4 Qc7 34.Kc2 Rf8 
35.Qe5 Qd8 36.Rf4 Rxf4 37.Qxf4 g6 38.Bg4 Qe7 39.Be6+ 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Cantero, Ronaldo"]
[Black "Sanguineti, Raul"]
[Result "1/2-1/2"]
[ECO "C84"]
[EventDate "1957.??.??"]
[PlyCount "39"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.c3 Nxe4 7.Re1 Nf6 8.Nxe5 
Nxe5 9.Rxe5 O-O 10.d4 d6 11.Re1 Bd7 12.Bc2 Bg4 13.f3 Bh5 14.Nd2 Re8 15.Nf1
Bg6 16.Bg5 Qd7 17.Bxg6 hxg6 18.Qd3 Nd5 19.Bxe7 Rxe7 20.c4 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Cantero, Ronaldo"]
[Black "Esposito, Alfredo"]
[Result "0-1"]
[ECO "C19"]
[EventDate "1957.??.??"]
[PlyCount "68"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.Nf3 Qa5 8.Qd2 
Nbc6 9.a4 Bd7 10.Ba3 cxd4 11.cxd4 Qxd2+ 12.Kxd2 Nf5 13.c3 Na5 14.Bb2 Nb3+ 
15.Kd1 Nxa1 16.Bxa1 Bxa4+ 17.Kd2 f6 18.Bd3 O-O 19.Re1 fxe5 20.Rxe5 Bd7 21.
c4 Ne7 22.Bb2 dxc4 23.Bxc4 b5 24.Bd3 b4 25.Be4 Nd5 26.Rh5 Nf6 27.Rh4 Nxe4+
28.Rxe4 a5 29.d5 exd5 30.Re5 Rf5 31.Re7 Rf7 32.Re5 a4 33.Bd4 a3 34.Ng5 Rf5
0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Cruz, Walter Oswaldo"]
[Black "Esposito, Alfredo"]
[Result "1/2-1/2"]
[ECO "E60"]
[EventDate "1957.??.??"]
[PlyCount "100"]

1.c4 Nf6 2.Nf3 g6 3.b3 Bg7 4.Bb2 O-O 5.g3 d6 6.d4 Nbd7 7.Bg2 e5 8.dxe5 
dxe5 9.O-O e4 10.Ne1 Re8 11.Nc2 c6 12.Ne3 Qa5 13.Qd2 Qh5 14.f4 exf3 15.
Bxf3 Qg5 16.Ng2 Qxd2 17.Nxd2 Ne5 18.Nf4 Bf5 19.Rfd1 Nfg4 20.Bxg4 Nxg4 21.
Bxg7 Kxg7 22.e4 Bxe4 23.Nxe4 Rxe4 24.Rd7 Ne5 25.Rxb7 g5 26.Nh3 Nf3+ 27.Kg2
g4 28.Nf2 Re2 29.Rd1 Rae8 30.h3 h5 31.hxg4 hxg4 32.Rdd7 Ng5 33.Rxa7 R8e5 
34.Kf1 Re1+ 35.Kg2 Rc1 36.Rd4 Rc2 37.Rxg4 Rf5 38.Rf4 Rxf4 39.gxf4 Ne4 40.
Kf3 Nxf2 41.Rc7 Nd3 42.Rxc6 Rxa2 43.Ke4 Nf2+ 44.Kd4 Rd2+ 45.Ke3 Rb2 46.Rb6
Ng4+ 47.Kd4 Rf2 48.Ke4 Nf6+ 49.Ke3 Ng4+ 50.Ke4 Nf6+ 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Cruz, Walter Oswaldo"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "A53"]
[EventDate "1957.??.??"]
[PlyCount "74"]

1.d4 Nf6 2.c4 d6 3.Nf3 Nbd7 4.Bf4 Nh5 5.Bg5 h6 6.Bd2 e5 7.Nc3 Nhf6 8.Qc2 
g6 9.Rd1 c6 10.g3 Bg7 11.Bg2 O-O 12.O-O Re8 13.e4 Qe7 14.Rfe1 a6 15.a4 a5 
16.h3 exd4 17.Nxd4 Nc5 18.Kh2 Nfd7 19.Be3 Na6 20.Nde2 Nb4 21.Qb1 h5 22.Bd4
h4 23.g4 Ne5 24.b3 g5 25.Be3 Bxg4 26.hxg4 Nxg4+ 27.Kg1 Qe5 28.Qc1 Qh2+ 29.
Kf1 h3 30.Bf3 Ne5 31.Ng1 Nbd3 32.Qd2 g4 33.Ke2 Nxe1 34.Rxe1 gxf3+ 35.Kd1 
Qg2 36.Nxh3 Qxh3 37.Rg1 Re6 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Cruz, Walter Oswaldo"]
[Black "Letelier Martner, Rene"]
[Result "0-1"]
[ECO "A21"]
[EventDate "1957.??.??"]
[PlyCount "56"]

1.c4 e5 2.Nc3 d6 3.g3 g6 4.Bg2 Bg7 5.e3 f5 6.Nge2 Nf6 7.O-O O-O 8.Qb3 c6 
9.d3 Qe7 10.e4 Kh8 11.Qa3 Nbd7 12.Bg5 h6 13.Bd2 Nc5 14.Na4 Nxa4 15.Qxa4 f4
16.gxf4 Nh5 17.fxe5 dxe5 18.d4 exd4 19.f4 d3 20.Nc1 Bg4 21.e5 Bxe5 22.Nxd3
Bd4+ 23.Kh1 Be2 24.c5 Rad8 25.Qc4 Bxf1 26.Rxf1 Qe2 27.Be1 Nxf4 28.Bh3 Qe4+
0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Cruz, Walter Oswaldo"]
[Black "Rubio Aguado, Fernando"]
[Result "1/2-1/2"]
[ECO "E60"]
[EventDate "1957.??.??"]
[PlyCount "87"]

1.c4 Nf6 2.Nf3 g6 3.b3 Bg7 4.Bb2 O-O 5.g3 d6 6.d4 Nbd7 7.Bg2 e5 8.dxe5 Ng4
9.O-O Ngxe5 10.Nxe5 dxe5 11.Nc3 f5 12.Ba3 c5 13.Qd5+ Kh8 14.Bxc5 Nxc5 15.
Qxc5 e4 16.Rad1 Qf6 17.Nd5 Qb2 18.Qe7 Qe5 19.f4 Qxe7 20.Nxe7 Be6 21.Rd6 
Rf6 22.Nd5 Bxd5 23.Rxd5 Ra6 24.Rfd1 Bf6 25.Rd6 Rxd6 26.Rxd6 Be7 27.Rd7 
Bc5+ 28.Kf1 b6 29.g4 fxg4 30.Bxe4 Rf8 31.f5 gxf5 32.Bd3 a5 33.Rd5 f4 34.
Rf5 Rxf5 35.Bxf5 h5 36.Bg6 h4 37.Bf5 g3 38.hxg3 fxg3 39.Kg2 Kg7 40.Kf3 Kf6
41.Bh3 Ke5 42.e3 Ba3 43.Bg2 Be7 44.Ke2 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Cruz, Walter Oswaldo"]
[Black "Silva, Luiz Tavares da"]
[Result "1-0"]
[ECO "E65"]
[EventDate "1957.??.??"]
[PlyCount "83"]

1.c4 g6 2.g3 Bg7 3.Bg2 Nf6 4.Nc3 O-O 5.Nf3 d6 6.d4 c5 7.O-O Nc6 8.e3 Na5 
9.b3 a6 10.Bb2 b6 11.Qe2 Bb7 12.e4 Nd7 13.d5 b5 14.cxb5 axb5 15.Rfe1 Ba6 
16.Qd2 f6 17.Ne2 Ne5 18.Nh4 b4 19.Nf4 Bc8 20.Ne6 Bxe6 21.dxe6 Qb6 22.f4 
Nec6 23.Qf2 Rab8 24.Bf1 Nd8 25.f5 g5 26.Ng2 Ndc6 27.Ne3 Qb7 28.Nd5 Ne5 29.
Be2 Nac6 30.Red1 Na7 31.Qe3 Nec6 32.h4 h6 33.Kg2 Nb5 34.Bxb5 Qxb5 35.Rh1 
Rb7 36.hxg5 fxg5 37.Bxg7 Kxg7 38.Rxh6 Rg8 39.Rg6+ Kf8 40.Rxg8+ Kxg8 41.
Qxg5+ Kf8 42.Qh6+ 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Cruz, Walter Oswaldo"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "E61"]
[EventDate "1957.??.??"]
[PlyCount "80"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 O-O 5.h3 d6 6.Bf4 Nfd7 7.Qd2 e5 8.Bh6 Re8
9.Bxg7 Kxg7 10.h4 h6 11.dxe5 dxe5 12.e3 e4 13.Nd4 Nf6 14.Be2 Na6 15.O-O-O 
c6 16.Nb3 Qe7 17.Qd6 Bg4 18.Qxe7 Rxe7 19.f3 Bh5 20.Rhe1 exf3 21.Bxf3 Rae8 
22.Bxh5 Nxh5 23.Na5 Ng3 24.Rd2 Nf5 25.h5 Nxe3 26.hxg6 fxg6 27.Rde2 Nb4 28.
Rd2 b6 29.Nb3 Nxc4 30.Rxe7+ Rxe7 31.Rd1 c5 32.a3 Nc6 33.Nb5 h5 34.Nd6 N6e5
35.a4 Rd7 36.Ne8+ Kf7 37.Rxd7+ Nxd7 38.Nc7 Ne3 39.a5 bxa5 40.g3 Nf1 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Cruz, Walter Oswaldo"]
[Black "Rossetto, Hector Decio"]
[Result "0-1"]
[ECO "E61"]
[EventDate "1957.??.??"]
[PlyCount "128"]

1.c4 Nf6 2.Nf3 d6 3.d4 g6 4.Nc3 Bg7 5.Bf4 O-O 6.h3 Nbd7 7.e3 c6 8.Be2 Qa5 
9.O-O e5 10.Bh2 Re8 11.Qd2 exd4 12.Nxd4 d5 13.Rad1 dxc4 14.Bxc4 Nb6 15.Bb3
Qc5 16.Rfe1 a5 17.a3 a4 18.Ba2 Nfd5 19.Nxd5 Nxd5 20.Rc1 Qa5 21.Red1 Nf6 
22.Qxa5 Rxa5 23.Bc7 Ra8 24.Rc4 Bf8 25.Rcc1 h6 26.Ne2 Bg7 27.Bb6 Be6 28.
Bxe6 Rxe6 29.Bd4 Rd8 30.Kf1 Red6 31.Ke1 h5 32.Be5 Rxd1+ 33.Rxd1 Rxd1+ 34.
Kxd1 Kf8 35.Kc2 Ke7 36.f3 Ke6 37.Bd4 Bh6 38.e4 Nd7 39.Kd3 b5 40.Bc3 Ne5+ 
41.Kc2 h4 42.Be1 Nc4 43.Bxh4 Bg7 44.Nf4+ Kd7 45.Nd3 Ne3+ 46.Kd2 Nxg2 47.
Bg3 Ke6 48.Ke2 g5 49.Kf2 Nf4 50.Bxf4 gxf4 51.Nxf4+ Kd6 52.Nd3 Bd4+ 53.Ke2 
c5 54.Kd2 c4 55.Nb4 Bxb2 56.Nc2 Ke5 57.Ke3 Bc1+ 58.Ke2 Kf4 59.Nd4 Bxa3 60.
Nxb5 Bb2 61.Kd2 Kxf3 62.Nd6 a3 63.Kc2 Bg7 64.e5 a2 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Cruz, Walter Oswaldo"]
[Black "Ley, Manuel Madeira de"]
[Result "0-1"]
[ECO "E63"]
[EventDate "1957.??.??"]
[PlyCount "132"]

1.c4 Nf6 2.Nf3 g6 3.g3 Bg7 4.Bg2 O-O 5.O-O d6 6.d4 a6 7.Nc3 Nc6 8.b3 Rb8 
9.Bb2 b5 10.d5 Na7 11.cxb5 axb5 12.b4 c5 13.a3 Ne4 14.Qc1 Nxc3 15.Bxc3 
Bxc3 16.Qxc3 Qb6 17.Rfc1 c4 18.Qd2 Kg7 19.h4 h5 20.Rd1 Bd7 21.Rac1 Rbc8 
22.Rc3 Rc7 23.Ng5 Nc8 24.Rf3 Qa7 25.Qc3+ Kg8 26.Rf4 Nb6 27.Bf3 Qa4 28.Ra1 
Bg4 29.e4 Nd7 30.Rxg4 hxg4 31.Bd1 Qa7 32.Bxg4 Ne5 33.Be2 Rfc8 34.Kg2 Qa4 
35.Bd1 Qa7 36.Bc2 Ng4 37.Qf3 Ne5 38.Qf4 Kg7 39.h5 gxh5 40.Qf5 Rh8 41.f4 e6
42.Nxe6+ fxe6 43.Qg5+ Ng6 44.f5 Qd4 45.Qxg6+ Kf8 46.Rf1 Rf7 47.Qxe6 Qf6 
48.a4 bxa4 49.Qxf6 Rxf6 50.Bxa4 Ke7 51.Bc6 Rf7 52.Rf3 Kf6 53.Rc3 Rg7 54.
Rxc4 Rhg8 55.Rc2 Rxg3+ 56.Kh2 R3g4 57.Kh3 Rxe4 58.b5 Re3+ 59.Kh2 Kxf5 60.
b6 Rb3 61.b7 Ke4 62.Rf2 h4 63.Rf6 h3 64.Rf2 Ke3 65.Ra2 Kf3 66.Ra8 Rb2+ 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Engels, Ludwig"]
[Black "Gentil, Luiz jr"]
[Result "1/2-1/2"]
[ECO "B66"]
[EventDate "1957.??.??"]
[PlyCount "112"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.Qd2 h6 8.Bxf6 
Qxf6 9.f4 Nc6 10.Nf3 Qd8 11.O-O-O Qc7 12.f5 Be7 13.Kb1 Bd7 14.g4 O-O-O 15.
h4 Kb8 16.Rh3 Qa5 17.Qf4 Bc8 18.Nd2 Ne5 19.Rh2 g5 20.fxg6 fxg6 21.Nc4 Nxc4
22.Bxc4 Rdf8 23.Qg3 Qc5 24.Qd3 Bf6 25.Rhh1 Be5 26.Ne2 Rf2 27.Nd4 Bxd4 28.
Qxd4 Qxd4 29.Rxd4 Kc7 30.e5 dxe5 31.Re4 b5 32.Re2 Rxe2 33.Bxe2 Rf8 34.Kc1 
Bb7 35.Rh3 Rf4 36.Kd2 Kd6 37.Rd3+ Bd5 38.Ra3 Bb7 39.Rd3+ Bd5 40.Ra3 Bb7 
41.Rd3+ Kc7 42.Rc3+ Bc6 43.Rg3 Rd4+ 44.Ke3 Re4+ 45.Kf2 Rf4+ 46.Ke3 Bd5 47.
Bd3 g5 48.hxg5 hxg5 49.b3 Kb6 50.c3 a5 51.Be2 a4 52.Rh3 axb3 53.axb3 Bxb3 
54.Rh5 Bc4 55.Rxg5 Bxe2 56.Rxe5 Rxg4 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Engels, Ludwig"]
[Black "Humerez Estrada, Cidar"]
[Result "1-0"]
[ECO "B95"]
[EventDate "1957.??.??"]
[PlyCount "55"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.Be2 Be7 8.Qd2 
Nbd7 9.f4 Qc7 10.O-O b5 11.Bf3 Bb7 12.Rae1 h6 13.Bh4 O-O 14.Qf2 b4 15.Nd1 
Nc5 16.Bxf6 Bxf6 17.Qe3 e5 18.Nf5 Ne6 19.fxe5 dxe5 20.Qf2 Nf4 21.Nde3 Kh7 
22.Nd5 Nxd5 23.exd5 Qd7 24.Be4 g6 25.Nxh6 Bg5 26.Nxf7 Kg7 27.Qg3 Rxf7 28.
Qxg5 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Engels, Ludwig"]
[Black "Cantero, Ronaldo"]
[Result "1-0"]
[ECO "B94"]
[EventDate "1957.??.??"]
[PlyCount "141"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e5 7.Nb3 Be6 8.g3 
Nbd7 9.Bg2 Be7 10.O-O h6 11.Be3 O-O 12.h3 Rc8 13.f4 Bc4 14.Re1 b5 15.Nd2 
Nb6 16.Bf2 Qc7 17.a3 Nfd7 18.Nxc4 Qxc4 19.Qf3 Qc7 20.Re2 exf4 21.gxf4 Bf6 
22.Nd1 Nc4 23.c3 Nc5 24.Ne3 Nxe3 25.Qxe3 Rfe8 26.Rd1 Be7 27.Rd5 Bf8 28.Qg3
Re6 29.f5 Re5 30.Bd4 Rxd5 31.exd5 Kh7 32.h4 Nb3 33.Bf2 Qd8 34.Be4 Kh8 35.
Bc2 Nc5 36.f6 Nd7 37.fxg7+ Bxg7 38.Qxd6 Ne5 39.Qxd8+ Rxd8 40.Be4 Nc4 41.
Kg2 Bf6 42.Bf3 a5 43.Bg3 Nd6 44.Kh3 Kg7 45.Bf4 Kg6 46.Kg4 Rd7 47.Re1 Rd8 
48.Bd1 Nc4 49.Bc2+ Kg7 50.Be4 Be5 51.Bc1 Kf6 52.Bxh6 Ke7 53.Bd3 Rxd5 54.
Bxc4 bxc4 55.Kf5 f6 56.Bf4 Kd6 57.Bxe5+ fxe5 58.Kf6 Rd2 59.Rxe5 Rxb2 60.h5
Rc2 61.Re3 Rf2+ 62.Kg5 Rg2+ 63.Kf4 Rf2+ 64.Kg4 Rg2+ 65.Rg3 Rh2 66.Rh3 Rg2+
67.Kf4 Rf2+ 68.Ke4 Kc6 69.h6 Rf8 70.h7 Rh8 71.a4 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Engels, Ludwig"]
[Black "Cruz, Walter Oswaldo"]
[Result "1-0"]
[ECO "C50"]
[EventDate "1957.??.??"]
[PlyCount "83"]

1.e4 e5 2.Bc4 Nf6 3.d3 Nc6 4.Nf3 Bc5 5.Be3 d6 6.Nbd2 O-O 7.c3 Bxe3 8.fxe3 
d5 9.exd5 Nxd5 10.Qe2 Bg4 11.h3 Bxf3 12.Qxf3 Nb6 13.Bb3 Kh8 14.Bc2 f5 15.
O-O a5 16.Rad1 Qe7 17.Rf2 Rad8 18.Rdf1 Rf6 19.Kh1 Nd7 20.d4 g6 21.Bb3 Rdf8
22.Qe2 Nb6 23.Qb5 g5 24.Bc2 Qe6 25.a4 Kg7 26.Nf3 exd4 27.exd4 h6 28.Nh2 
Ne7 29.Bb3 Qd6 30.Qxa5 h5 31.Qe5 Qxe5 32.dxe5 Rc6 33.Nf3 Rg6 34.Nd4 Kh6 
35.a5 Nbd5 36.Nxf5+ Nxf5 37.Rxf5 Rxf5 38.Rxf5 Nf4 39.Bc2 Kg7 40.Rxf4 gxf4 
41.Bxg6 Kxg6 42.b4 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Engels, Ludwig"]
[Black "Perez Alcocer, Jose"]
[Result "1-0"]
[ECO "C18"]
[EventDate "1957.??.??"]
[PlyCount "63"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 Ne7 5.h4 c5 6.a3 Bxc3+ 7.bxc3 Qc7 8.Rh3 b6 
9.h5 h6 10.Qg4 Kf8 11.Qf4 Ba6 12.Rf3 Nec6 13.Ne2 Nd8 14.Qh4 Nbc6 15.Nf4 
Bxf1 16.Ng6+ Kg8 17.Nxh8 Ba6 18.Bxh6 Nxe5 19.dxe5 Qxe5+ 20.Re3 Qf5 21.Qg3 
Qh7 22.Bg5 Kxh8 23.h6 Kg8 24.O-O-O f6 25.Bxf6 Qxh6 26.Bxg7 Qxg7 27.Qh4 Kf8
28.Rg3 Qe5 29.f4 Qf5 30.Rg5 Qf6 31.Rg8+ Ke7 32.Re8+ 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Engels, Ludwig"]
[Black "Sanguineti, Raul"]
[Result "1/2-1/2"]
[ECO "E53"]
[EventDate "1957.??.??"]
[PlyCount "141"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 O-O 6.Nf3 d5 7.O-O b6 8.Qe2 cxd4 
9.exd4 Ba6 10.cxd5 Bxd3 11.Qxd3 Nxd5 12.Nxd5 Qxd5 13.Ng5 f5 14.Qe2 Rf6 15.
Bf4 h6 16.Nf3 Nc6 17.Rac1 Rc8 18.a3 Bd6 19.Bxd6 Qxd6 20.Rc4 Rff8 21.Re1 
Rfe8 22.h4 Qd5 23.Rc3 Rcd8 24.Qc4 Nxd4 25.Nxd4 Qxd4 26.Rxe6 Qxc4 27.Rxe8+ 
Rxe8 28.Rxc4 Re1+ 29.Kh2 Re2 30.b3 Rxf2 31.Rc7 Rf4 32.Kh3 Rd4 33.Rxa7 Rd3+
34.Kh2 Rxb3 35.a4 Kh7 36.a5 bxa5 37.Rxa5 Kg6 38.Ra7 Rb2 39.Kg3 Rb4 40.Ra5 
Re4 41.Rb5 Kf6 42.Ra5 Re5 43.Ra6+ Re6 44.Ra5 Rd6 45.Kh3 Rd3+ 46.Kh2 f4 47.
Rb5 Re3 48.Ra5 g5 49.hxg5+ hxg5 50.Rb5 Re5 51.Rb4 Kf5 52.Ra4 Re2 53.Ra5+ 
Kg4 54.Ra3 Kh5 55.Rh3+ Kg6 56.Ra3 g4 57.Kg1 Kg5 58.Kf1 Rb2 59.g3 f3 60.
Ra5+ Kf6 61.Ra6+ Ke5 62.Ra5+ Ke4 63.Ra4+ Ke3 64.Ra3+ Kd2 65.Ra4 Rc2 66.Ra8
Rc4 67.Kf2 Rc2 68.Kf1 Rc5 69.Kf2 Kd3 70.Rd8+ Ke4 71.Re8+ 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Engels, Ludwig"]
[Black "Ley, Manuel Madeira de"]
[Result "1-0"]
[ECO "C59"]
[EventDate "1957.??.??"]
[PlyCount "73"]

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5 6.Bb5+ c6 7.dxc6 bxc6 8.
Be2 h6 9.Nf3 e4 10.Ne5 Qc7 11.f4 g5 12.d4 exd3 13.Nxd3 Bd6 14.O-O Nc4 15.
Nc3 g4 16.Re1 Kf8 17.Kh1 Bf5 18.b3 Nb6 19.Rf1 Rg8 20.Ne5 Rd8 21.Bd3 Bxd3 
22.Nxd3 g3 23.h3 Nbd5 24.Nxd5 cxd5 25.Bb2 Ng4 26.Bd4 Qe7 27.Qd2 Qh4 28.Rf3
Re8 29.Re1 Re4 30.c3 Nh2 31.Rfe3 f5 32.Bc5 Bxc5 33.Nxc5 Qxf4 34.Nxe4 dxe4 
35.Qd4 Rg6 36.Rd1 Ng4 37.Qd8+ 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Engels, Ludwig"]
[Black "Mangini, Jose Thiago"]
[Result "1/2-1/2"]
[ECO "B50"]
[EventDate "1957.??.??"]
[PlyCount "120"]

1.e4 c5 2.Nf3 d6 3.c3 Nf6 4.Bc4 Nc6 5.Qe2 Bg4 6.d3 g6 7.Nbd2 Bg7 8.h3 Bxf3
9.Nxf3 O-O 10.a3 d5 11.Ba2 e5 12.O-O d4 13.cxd4 Nxd4 14.Nxd4 Qxd4 15.Be3 
Qd6 16.b4 cxb4 17.axb4 Qxb4 18.Rfc1 Rfc8 19.Rab1 Rxc1+ 20.Rxc1 Qd6 21.Qc2 
Ne8 22.Bd5 Qd7 23.Kh2 Nf6 24.Ba2 Bf8 25.Qc7 Rd8 26.Bxa7 Qxc7 27.Rxc7 Rd7 
28.Bb8 Rxc7 29.Bxc7 Nd7 30.Bc4 Bc5 31.Kg3 Bb6 32.Bd6 Kg7 33.Bd5 Bc5 34.Bc7
Bd4 35.f4 f6 36.Kf3 Nc5 37.Bc4 Na4 38.g4 Nc3 39.g5 b5 40.gxf6+ Kxf6 41.Bb3
exf4 42.Bxf4 g5 43.Bc7 h5 44.Bd8+ Kg6 45.Be6 Bf6 46.Bc7 Bd4 47.e5 b4 48.
Bc4 Kf5 49.e6 g4+ 50.hxg4+ hxg4+ 51.Kg2 Bf6 52.Bd6 Nd1 53.Bb3 Nb2 54.d4 
Nd3 55.d5 Ke4 56.Kf1 Nc1 57.Bxb4 Nxb3 58.d6 Kf3 59.Be1 g3 60.Bxg3 Nd2+ 
1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Esposito, Alfredo"]
[Black "Ley, Manuel Madeira de"]
[Result "1-0"]
[ECO "E65"]
[EventDate "1957.??.??"]
[PlyCount "82"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d6 5.Nf3 O-O 6.O-O c5 7.Nc3 Nc6 8.dxc5 
dxc5 9.Be3 Be6 10.Qa4 Qa5 11.Qxa5 Nxa5 12.Bxc5 Bxc4 13.Rfd1 Nc6 14.Nd4 
Nxd4 15.Rxd4 Ba6 16.Bxe7 Rfe8 17.Ba3 Nh5 18.Rd7 Nf6 19.Rc7 Rac8 20.Rxc8 
Rxc8 21.Rd1 h5 22.h3 b6 23.e4 Bc4 24.e5 Ne8 25.f4 a5 26.Bd5 Bf8 27.Bxf8 
Kxf8 28.Kf2 Ng7 29.Kf3 Ne6 30.g4 hxg4+ 31.hxg4 b5 32.Bxe6 Bxe6 33.Nxb5 Rb8
34.a4 Bb3 35.Rd2 Bxa4 36.Nd6 Bd7 37.Kg3 Be6 38.Kh4 Rb3 39.f5 gxf5 40.gxf5 
Rb4+ 41.Kg5 Ba2 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Esposito, Alfredo"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "A25"]
[EventDate "1957.??.??"]
[PlyCount "82"]

1.c4 g6 2.g3 Bg7 3.Bg2 e5 4.Nc3 Ne7 5.e3 Nbc6 6.Nge2 Nf5 7.Rb1 a5 8.a3 O-O
9.b4 axb4 10.axb4 d6 11.O-O Be6 12.d3 Qc8 13.h3 Nce7 14.Kh2 c6 15.e4 Nh6 
16.b5 c5 17.f4 f6 18.Be3 Nf7 19.Ra1 f5 20.Rxa8 Qxa8 21.fxe5 Bxe5 22.Nf4 
Bd7 23.Ncd5 Nxd5 24.Nxd5 Qd8 25.Bf4 b6 26.exf5 Bxf5 27.Rf2 Be6 28.Bxe5 
Nxe5 29.Rxf8+ Kxf8 30.Qf1+ Kg7 31.Nf4 Bf7 32.Be4 Qf6 33.Qe2 g5 34.Ng2 Bg6 
35.Ne3 Bxe4 36.dxe4 Qf3 37.Qxf3 Nxf3+ 38.Kg2 Nd2 39.Nf5+ Kf6 40.Nxd6 Ke6 
41.Ne8 Ke5 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Esposito, Alfredo"]
[Black "Engels, Ludwig"]
[Result "1/2-1/2"]
[ECO "A25"]
[EventDate "1957.??.??"]
[PlyCount "126"]

1.c4 e5 2.Nc3 f5 3.g3 Nf6 4.Bg2 Bc5 5.e3 Nc6 6.Nge2 e4 7.d4 exd3 8.Qxd3 
Ne5 9.Qxf5 Qe7 10.Qc2 O-O 11.O-O c6 12.Na4 Bd6 13.Nd4 Bc7 14.f4 Nf7 15.Bd2
d5 16.cxd5 Nxd5 17.Rae1 Nb6 18.Nxb6 Bxb6 19.Bc3 Nd6 20.Kh1 Bg4 21.a4 Rae8 
22.a5 Bc7 23.e4 c5 24.Nb5 Nxb5 25.Qb3+ Be6 26.Qxb5 a6 27.Qe2 Qf7 28.Qe3 
Bc4 29.Rf2 b6 30.Rd2 Rd8 31.Red1 Rxd2 32.Rxd2 Qe7 33.axb6 Bxb6 34.Qf3 Rd8 
35.Rxd8+ Qxd8 36.Qg4 g6 37.h4 Ba5 38.Bxa5 Qxa5 39.h5 Qa1+ 40.Kh2 Qxb2 41.
Qc8+ Kg7 42.Qd7+ Kh6 43.g4 g5 44.Qe7 gxf4 45.e5 Qb6 46.Qf8+ Kg5 47.Qf5+ 
Kh4 48.Qxf4 Bg8 49.Qg3+ Kg5 50.Qe3+ Kh4 51.Qf2+ Kxg4 52.Qg3+ Kxh5 53.Qxg8 
Qg6 54.Qd5 Kg5 55.e6+ Kf6 56.Qd6 Qh5+ 57.Kg1 Qe2 58.e7+ Kg7 59.Bc6 Qe1+ 
60.Kg2 Qe2+ 61.Kg3 Qe1+ 62.Kf4 Qf2+ 63.Bf3 Kf7 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Esposito, Alfredo"]
[Black "Letelier Martner, Rene"]
[Result "1/2-1/2"]
[ECO "A84"]
[EventDate "1957.??.??"]
[PlyCount "95"]

1.c4 c6 2.d4 d5 3.Nf3 e6 4.e3 f5 5.Bd3 Bd6 6.Nc3 Qf6 7.Qc2 Ne7 8.b3 Nd7 9.
Bb2 g5 10.O-O-O a6 11.Kb1 Ng6 12.cxd5 cxd5 13.Nd2 Be7 14.f3 Nb6 15.Rhe1 
Bd7 16.e4 Rc8 17.Nf1 O-O 18.e5 Qg7 19.Ne3 Rc6 20.Rc1 Qh6 21.g4 f4 22.Ng2 
Rfc8 23.Bxg6 Qxg6 24.Qxg6+ hxg6 25.Re2 Kg7 26.Ne1 Na8 27.a4 Nc7 28.Rec2 a5
29.Nd3 b6 30.Nd1 Na6 31.Rxc6 Bxc6 32.Ka2 Kf7 33.Ba3 Nb4+ 34.Nxb4 axb4 35.
Bb2 Ke8 36.Nf2 Kd7 37.Rc2 Ra8 38.Kb1 b5 39.axb5 Bxb5 40.Bc1 Bf1 41.Ra2 
Rxa2 42.Kxa2 Be2 43.Kb2 Bd8 44.Kc2 Bb6 45.Bb2 Bxf3 46.Kd3 Kc6 47.Ba1 Bg2 
48.Bb2 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Esposito, Alfredo"]
[Black "Rubio Aguado, Fernando"]
[Result "1/2-1/2"]
[ECO "A61"]
[EventDate "1957.??.??"]
[PlyCount "104"]

1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.Nf3 g6 7.Nd2 Bg7 8.Nc4 O-O
9.Bf4 Ne8 10.Qd2 a6 11.a4 f5 12.g3 Nd7 13.Nxd6 Nb6 14.Nxe8 Rxe8 15.Bg2 Nc4
16.Qc2 Qb6 17.Ra2 Qb4 18.O-O Nxb2 19.Rxb2 Qxc3 20.Qxc3 Bxc3 21.Rc2 Bb4 22.
Bc7 Bd7 23.a5 Ba4 24.Rb2 Bb5 25.d6 Rab8 26.Rd1 Bd7 27.e3 Kf7 28.Rxb4 cxb4 
29.Rb1 Ke6 30.Rxb4 Bb5 31.Rd4 Kd7 32.Bxb8 Rxb8 33.e4 Rc8 34.h4 Rc1+ 35.Kh2
fxe4 36.Bxe4 Bc6 37.h5 gxh5 38.Bxc6+ bxc6 39.Rb4 Rc5 40.Rb7+ Kxd6 41.Rxh7 
Rxa5 42.Kg2 Rf5 43.f4 Rb5 44.Kf3 a5 45.Ke4 a4 46.f5 Rb4+ 47.Ke3 h4 48.gxh4
a3 49.Ra7 Rxh4 50.f6 Rh6 51.f7 Rf6 52.Rxa3 Rxf7 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Esposito, Alfredo"]
[Black "Silva, Luiz Tavares da"]
[Result "1-0"]
[ECO "A72"]
[EventDate "1957.??.??"]
[PlyCount "45"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 c5 7.d5 e6 8.Nf3 exd5 
9.cxd5 h6 10.Bh4 a6 11.a4 Qa5 12.O-O Qb4 13.Qc2 Re8 14.Nd2 Nbd7 15.Nc4 Nb6
16.Na2 Qxa4 17.b3 Qb5 18.Nxd6 Qd7 19.Nxe8 Qxe8 20.Nc3 Nbd7 21.Bg3 Ne5 22.
h3 Bd7 23.f4 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Esposito, Alfredo"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "E66"]
[EventDate "1957.??.??"]
[PlyCount "102"]

1.c4 g6 2.g3 Bg7 3.Bg2 Nf6 4.Nc3 O-O 5.Nf3 d6 6.d4 Nc6 7.O-O Rb8 8.d5 Na5 
9.Nd2 c5 10.Qc2 e6 11.b3 exd5 12.cxd5 b5 13.Bb2 Re8 14.Rad1 Bf5 15.e4 Bg4 
16.Rde1 Qd7 17.f3 Bh3 18.Nd1 Bxg2 19.Kxg2 Nb7 20.Ne3 Qe7 21.Kg1 Nd7 22.
Bxg7 Kxg7 23.f4 f6 24.Qd1 Nd8 25.Qg4 Kh8 26.Rf2 Nf7 27.Rfe2 Rg8 28.Qf3 
Rbe8 29.Ng4 Qd8 30.Qd3 Qa5 31.Qc2 Kg7 32.Qb2 c4 33.b4 Qb6+ 34.Kg2 h5 35.
Nf2 a5 36.a3 axb4 37.axb4 Ra8 38.Nf3 Ra4 39.Nd4 Rga8 40.Nc6 Ra3 41.Na5 
R8xa5 42.bxa5 Qxa5 43.Qd4 c3 44.Rc2 b4 45.Nd3 Ra4 46.Rcc1 Nc5 47.e5 fxe5 
48.fxe5 Nb3 49.Qf2 Qxd5+ 50.Kg1 dxe5 51.Rcd1 Nd2 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Esposito, Alfredo"]
[Black "Rossetto, Hector Decio"]
[Result "0-1"]
[ECO "A23"]
[EventDate "1957.??.??"]
[PlyCount "78"]

1.c4 Nf6 2.Nc3 e5 3.g3 c6 4.Nf3 e4 5.Nd4 d5 6.cxd5 cxd5 7.Bg2 Nc6 8.Nxc6 
bxc6 9.d3 exd3 10.Qxd3 Be7 11.O-O O-O 12.Be3 Re8 13.Rfd1 Be6 14.h3 Nd7 15.
Rac1 Ne5 16.Qc2 Nc4 17.Bd4 Qc8 18.Na4 c5 19.Nxc5 Bxc5 20.Bxc5 Qxc5 21.b3 
Rac8 22.bxc4 dxc4 23.e3 g6 24.Qc3 Red8 25.Rd4 a5 26.Rcd1 Rxd4 27.exd4 Qb4 
28.Rc1 Kf8 29.d5 Qxc3 30.Rxc3 Bd7 31.Kf1 Ke7 32.Ke1 Kd6 33.Ra3 c3 34.Kd1 
a4 35.f4 h5 36.Be4 Re8 37.Bd3 Re3 38.Rxc3 Rxg3 39.Kd2 Rxh3 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Gentil, Luiz jr"]
[Black "Esposito, Alfredo"]
[Result "1/2-1/2"]
[ECO "C00"]
[EventDate "1957.??.??"]
[PlyCount "41"]

1.e4 e6 2.d3 d5 3.Nd2 Nf6 4.Ngf3 dxe4 5.dxe4 Bc5 6.Bc4 Nc6 7.O-O e5 8.c3 
a5 9.h3 O-O 10.Re1 Qe7 11.Nf1 Be6 12.Qe2 Nh5 13.Bxe6 fxe6 14.Be3 Nf4 15.
Qc4 Bd6 16.N1h2 Rf6 17.g3 Rg6 18.Qf1 Rf8 19.Kh1 Nh5 20.Qc4 Nd8 21.Nh4 
1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Gentil, Luiz jr"]
[Black "Cruz, Walter Oswaldo"]
[Result "1/2-1/2"]
[ECO "C84"]
[EventDate "1957.??.??"]
[PlyCount "92"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.d4 Nxe4 6.O-O Be7 7.Qe2 b5 8.Nxe5 
Nd6 9.Nxc6 dxc6 10.Bb3 O-O 11.c3 Bf5 12.Nd2 Bf6 13.Nf3 Re8 14.Be3 Bg6 15.
Rfe1 Bh5 16.h3 Nf5 17.Qd3 Qd7 18.Bf4 c5 19.g4 c4 20.Qxf5 Qxf5 21.gxf5 Bxf3
22.Bc2 c6 23.Re3 Bd5 24.Rae1 Rec8 25.Bd6 Bg5 26.f4 Bh4 27.R1e2 h6 28.Be7 
Bxe7 29.Rxe7 Kf8 30.R7e3 Re8 31.Kf2 Rxe3 32.Rxe3 Re8 33.Re5 f6 34.Rxe8+ 
Kxe8 35.Ke3 Ke7 36.h4 Kd6 37.Bd1 Bg2 38.Bc2 Kd5 39.Bb1 a5 40.a3 c5 41.dxc5
Kxc5 42.Bc2 Bc6 43.Kf2 Bd7 44.Ke3 b4 45.Ke4 Bc6+ 46.Ke3 bxa3 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Gentil, Luiz jr"]
[Black "Cantero, Ronaldo"]
[Result "1-0"]
[ECO "B92"]
[EventDate "1957.??.??"]
[PlyCount "82"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5 7.Nb3 Be6 8.O-O b5
9.Bg5 Nbd7 10.a4 b4 11.Nd5 Bxd5 12.exd5 Be7 13.f4 O-O 14.Kh1 h6 15.fxe5 
hxg5 16.exf6 Bxf6 17.Rb1 g6 18.Bg4 Ne5 19.Nd4 Bg7 20.Nc6 Qc7 21.Be2 a5 22.
c3 Nxc6 23.dxc6 Rab8 24.Bf3 Be5 25.Bd5 Kg7 26.Qg4 f6 27.g3 bxc3 28.bxc3 
Bxc3 29.Rb7 Rxb7 30.cxb7 Bb4 31.Qe6 Qd8 32.Rc1 Bc5 33.Re1 Ba7 34.Qe7+ Kh6 
35.Qxd8 Rxd8 36.Rc1 Bc5 37.Be6 Rb8 38.Bc8 Kg7 39.Kg2 Kf7 40.Kf3 f5 41.Ke2 
Ke7 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Gentil, Luiz jr"]
[Black "Perez Alcocer, Jose"]
[Result "1/2-1/2"]
[ECO "B08"]
[EventDate "1957.??.??"]
[PlyCount "94"]

1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Be2 Bg7 5.Nf3 O-O 6.O-O Nbd7 7.h3 c5 8.e5 Ne8 
9.exd6 Nxd6 10.dxc5 Nxc5 11.Be3 Ne6 12.Nd4 Nxd4 13.Bxd4 Be6 14.Bxg7 Kxg7 
15.Qd4+ Kg8 16.Rfd1 Qa5 17.Nd5 Bxd5 18.Qxd5 Qxd5 19.Rxd5 Rfc8 20.c3 Rc7 
21.Rad1 a6 22.R5d4 Rc5 23.R1d2 Rac8 24.Rd5 Kf8 25.Kf1 Ke8 26.Ke1 Rxd5 27.
Rxd5 Kd7 28.Rd4 e5 29.Rb4 h5 30.Bf3 e4 31.Be2 Ke6 32.Rb6 Ke5 33.a4 Kd5 34.
Rb4 f5 35.Rd4+ Ke5 36.f4+ Ke6 37.h4 b5 38.axb5 axb5 39.Rb4 Rc5 40.Rd4 Rc7 
41.Rb4 Rc5 42.Kd2 Nc4+ 43.Bxc4+ bxc4 44.Rb6+ Kf7 45.Rb7+ Kf6 46.Rb6+ Kf7 
47.Ke2 Rc7 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Gentil, Luiz jr"]
[Black "Silva, Luiz Tavares da"]
[Result "1/2-1/2"]
[ECO "E66"]
[EventDate "1957.??.??"]
[PlyCount "139"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 O-O 5.Nf3 d6 6.O-O Nc6 7.Nc3 e5 8.d5 Na5 
9.Nd2 c5 10.dxc6 Nxc6 11.Nde4 Nxe4 12.Nxe4 Nd4 13.e3 Nf5 14.b3 Qb6 15.Qd2 
Rd8 16.Nc3 Be6 17.Bb2 Ne7 18.Rfd1 Rd7 19.Nd5 Nxd5 20.Bxd5 a5 21.Rac1 Qc5 
22.Bc3 Bg4 23.Re1 Be6 24.Red1 Bg4 25.Re1 Be6 26.Rcd1 Bg4 27.f3 Be6 28.Kg2 
h5 29.Re2 Qc7 30.Qd3 Bxd5 31.Qxd5 e4 32.Bxg7 exf3+ 33.Kxf3 Kxg7 34.Red2 
Re8 35.e4 Re6 36.Qd4+ Kh7 37.c5 Qc6 38.Qd5 Qc8 39.Qc4 Rc7 40.Rxd6 Rxc5 41.
Qd4 Rxd6 42.Qxd6 Qg4+ 43.Kf2 Rc2+ 44.Rd2 Qxe4 45.Qd7 Qe6 46.Qd3 Qf6+ 47.
Kg2 Rc3 48.Qd5 Qc6 49.Qxc6 Rxc6 50.Rd7 Kg7 51.Rxb7 Rc2+ 52.Kg1 Rxa2 53.Ra7
Ra3 54.Rb7 Kh6 55.Rxf7 Rxb3 56.Ra7 Ra3 57.Kf2 Kg5 58.Ra6 Kf5 59.h3 a4 60.
h4 Ra1 61.Kf3 a3 62.Ra5+ Kf6 63.Ra6+ Ke5 64.Kg2 Ke4 65.Rxg6 Ra2+ 66.Kh3 
Rb2 67.Ra6 a2 68.g4 hxg4+ 69.Kxg4 Kd3 70.h5 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Gentil, Luiz jr"]
[Black "Sanguineti, Raul"]
[Result "0-1"]
[ECO "B66"]
[EventDate "1957.??.??"]
[PlyCount "88"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.Qd2 h6 8.Bxf6 
Qxf6 9.O-O-O Nc6 10.g3 Nxd4 11.Qxd4 Qxd4 12.Rxd4 Bd7 13.Be2 Be7 14.Rhd1 
Bc6 15.Kb1 O-O 16.f3 Rac8 17.Bf1 Rfd8 18.R4d2 g5 19.Bh3 Kg7 20.a3 h5 21.
Bf1 Rh8 22.f4 h4 23.Rf2 hxg3 24.hxg3 Rcd8 25.f5 Rh1 26.fxe6 fxe6 27.Bc4 
Rxd1+ 28.Nxd1 Bd7 29.Kc1 Bf6 30.Kd2 Be5 31.g4 Rh8 32.b3 Rh3 33.Ke2 b5 34.
Bd3 Bd4 35.Rg2 Bc6 36.Nf2 Rh4 37.a4 bxa4 38.bxa4 Bxa4 39.Bxa6 Bxc2 40.Nd3 
Rh3 41.Bc4 Kf6 42.Kd2 Ba4 43.e5+ dxe5 44.Nf2 Bc6 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Gentil, Luiz jr"]
[Black "Rubio Aguado, Fernando"]
[Result "1/2-1/2"]
[ECO "B92"]
[EventDate "1957.??.??"]
[PlyCount "117"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5 7.Nb3 Be7 8.O-O 
O-O 9.Be3 Be6 10.f3 Qc7 11.Qd2 Nbd7 12.a4 b6 13.Nd5 Nxd5 14.exd5 Bf5 15.c3
a5 16.f4 exf4 17.Bxf4 Bg6 18.Nd4 Nc5 19.Qd1 Ne4 20.Nc6 Bg5 21.Bxg5 Nxg5 
22.h4 Ne6 23.dxe6 Qxc6 24.exf7+ Bxf7 25.Qd4 Bd5 26.Bb5 Qc5 27.Rxf8+ Rxf8 
28.Rd1 Bb3 29.Qxc5 dxc5 30.Rd6 Rb8 31.Kf2 Kf7 32.g4 h6 33.g5 hxg5 34.hxg5 
Be6 35.Kg3 Ke7 36.Rc6 g6 37.Bd3 Kd7 38.Bb5 Ke7 39.Bd3 Kd7 40.Bb5 Ke7 41.b3
Rf8 42.Rc7+ Kd6 43.Rg7 Bf5 44.Rb7 Rh8 45.Rxb6+ Ke5 46.b4 cxb4 47.cxb4 axb4
48.Bf1 Rh1 49.Rb5+ Kd6 50.Bc4 Rh3+ 51.Kf2 Ra3 52.a5 Rc3 53.Be2 Rc5 54.Rxb4
Rxa5 55.Kg3 Ra3+ 56.Kf4 Rh3 57.Rb8 Rh4+ 58.Kg3 Re4 59.Bf3 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Humerez Estrada, Cidar"]
[Black "Esposito, Alfredo"]
[Result "1/2-1/2"]
[ECO "C19"]
[EventDate "1957.??.??"]
[PlyCount "81"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.a4 Nbc6 8.Nf3 
Qa5 9.Bd2 c4 10.Be2 Bd7 11.Qb1 b6 12.O-O O-O 13.Re1 f6 14.exf6 Rxf6 15.Qb5
h6 16.Qxa5 Nxa5 17.Ne5 Rd8 18.Bg4 Bc8 19.Bh3 Nac6 20.Nxc6 Nxc6 21.f4 Bd7 
22.Re2 Na5 23.g3 Nb7 24.Bc1 Re8 25.Ba3 Bxa4 26.Bb4 b5 27.Rae1 a5 28.Ba3 
Nd8 29.Bd6 Nc6 30.Rxe6 Rexe6 31.Rxe6 b4 32.cxb4 axb4 33.Rxf6 gxf6 34.Be6+ 
Kg7 35.Bxd5 Nxd4 36.Bxb4 Nxc2 37.Bd2 Nd4 38.Kf2 Nb3 39.Ke3 Nxd2 40.Kxd2 
Bd7 41.Bxc4 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Humerez Estrada, Cidar"]
[Black "Gentil, Luiz jr"]
[Result "1/2-1/2"]
[ECO "C10"]
[EventDate "1957.??.??"]
[PlyCount "61"]

1.e4 e6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Nf3 Ngf6 6.Nxf6+ Nxf6 7.Bd3 Be7 8.
O-O O-O 9.c3 b6 10.Qc2 Bb7 11.Ng5 h6 12.Nh3 c5 13.Be3 Qc7 14.f3 Nd5 15.Bf2
cxd4 16.Bxd4 Bc5 17.Qf2 Bxd4 18.Qxd4 Rfd8 19.Rad1 Nf6 20.Qh4 Rd7 21.Bc2 
Rad8 22.Rxd7 Rxd7 23.Rd1 Rxd1+ 24.Bxd1 Qd6 25.Qe1 Ba6 26.Nf2 g6 27.Bc2 Kg7
28.Kh1 Bb7 29.Qe3 Qd5 30.Bb3 Qd6 31.Kg1 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Humerez Estrada, Cidar"]
[Black "Cantero, Ronaldo"]
[Result "1/2-1/2"]
[ECO "B99"]
[EventDate "1957.??.??"]
[PlyCount "98"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 Qc7
9.Be2 Nbd7 10.O-O-O b5 11.Bxf6 gxf6 12.Qg3 Bf8 13.Bh5 Nc5 14.Rhe1 b4 15.
Nd5 Qb7 16.Nxf6+ Kd8 17.e5 d5 18.Nb3 Nd7 19.Nxd7 Qxd7 20.Kb1 a5 21.Be2 a4 
22.Nd4 Ba6 23.Bxa6 Rxa6 24.f5 Kc7 25.Rf1 Kb8 26.fxe6 fxe6 27.Qf3 Bg7 28.
Qd3 Rb6 29.Rf3 Bxe5 30.Rdf1 Rc8 31.Rf7 Qd6 32.Re1 Bxd4 33.Qxd4 Rb7 34.Ref1
Rbc7 35.R1f4 Rxf7 36.Rxf7 Rc7 37.Rxc7 Kxc7 38.Qa7+ Kc8 39.Qxa4 Qxh2 40.
Qe8+ Kb7 41.Qe7+ Ka8 42.Qe8+ Kb7 43.Qe7+ Ka8 44.a4 bxa3 45.Qxa3+ Kb7 46.
Qe7+ Kb8 47.Qe8+ Kb7 48.Qxe6 Qxg2 49.Qe7+ Kc6 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Humerez Estrada, Cidar"]
[Black "Cruz, Walter Oswaldo"]
[Result "1-0"]
[ECO "C92"]
[EventDate "1957.??.??"]
[PlyCount "93"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.h3 d6 
9.c3 Be6 10.d4 Bxb3 11.axb3 exd4 12.Nxd4 Nxd4 13.Qxd4 Re8 14.Nd2 Qc8 15.
Nf1 Qb7 16.Ng3 c5 17.Qd1 g6 18.Qf3 Nd7 19.Bh6 Ne5 20.Qe3 f6 21.Bf4 Nf7 22.
Qd2 a5 23.Nf1 Bf8 24.f3 a4 25.bxa4 bxa4 26.Ne3 Reb8 27.Re2 Bg7 28.Nd5 Re8 
29.Qc2 a3 30.bxa3 c4 31.Ree1 f5 32.Reb1 Qc6 33.Rb6 Qc8 34.a4 fxe4 35.fxe4 
Ra5 36.Rab1 g5 37.Ne7+ Rxe7 38.Rb8 Ra8 39.Rxc8+ Rxc8 40.Bg3 Rce8 41.a5 Ra8
42.Rb5 Rea7 43.Qa4 Bxc3 44.Qxc4 Rxa5 45.Rb7 d5 46.Qxc3 dxe4 47.Qf6 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Humerez Estrada, Cidar"]
[Black "Perez Alcocer, Jose"]
[Result "1-0"]
[ECO "C90"]
[EventDate "1957.??.??"]
[PlyCount "65"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 Bg4 
9.a4 Rb8 10.h3 Bh5 11.axb5 axb5 12.d3 Qd7 13.Nbd2 d5 14.exd5 Nxd5 15.Ne4 
Bg6 16.Ng3 Qd6 17.d4 e4 18.Nxe4 Bxe4 19.Rxe4 O-O 20.Qc2 Ra8 21.Rxa8 Rxa8 
22.Ne5 Na5 23.Ba2 Nb7 24.Bb1 f5 25.Re1 g6 26.Qb3 b4 27.Ba2 Rd8 28.cxb4 
Qxb4 29.Nd3 Qxb3 30.Bxb3 Bf6 31.Nb4 c6 32.Nxc6 Rd7 33.Nb4 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Humerez Estrada, Cidar"]
[Black "Sanguineti, Raul"]
[Result "0-1"]
[ECO "B38"]
[EventDate "1957.??.??"]
[PlyCount "62"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 Nh6 7.Be2 d6 8.O-O 
O-O 9.Qd2 Ng4 10.Bxg4 Bxg4 11.f4 Nxd4 12.Bxd4 e5 13.Be3 Be6 14.f5 Bxc4 15.
Rf2 gxf5 16.exf5 d5 17.Na3 Ba6 18.Rc1 f6 19.Rf3 Rf7 20.Bh6 Kh8 21.Rg3 Bxh6
22.Qxh6 Rc8 23.h3 Rxc1+ 24.Qxc1 d4 25.Kh2 Qc7 26.Qd1 d3 27.b4 e4 28.Qh5 e3
29.b5 e2 30.Nc2 dxc2 31.Qxe2 Re7 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Humerez Estrada, Cidar"]
[Black "Ley, Manuel Madeira de"]
[Result "1-0"]
[ECO "C63"]
[EventDate "1957.??.??"]
[PlyCount "97"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.d3 fxe4 5.dxe4 Bc5 6.Bg5 Nf6 7.Nc3 d6 8.Nd5 
Bg4 9.Bxf6 gxf6 10.h3 Bh5 11.c3 Rf8 12.Qa4 Qd7 13.Nh4 Bg6 14.g4 a6 15.Bd3 
Ba7 16.Rd1 b5 17.Qa3 Nd8 18.f4 exf4 19.Nxg6 hxg6 20.Nxf4 Qh7 21.h4 Qd7 22.
Be2 Qe7 23.c4 b4 24.Qf3 Qf7 25.Rf1 Rb8 26.Nd5 Nc6 27.Nxf6+ Kd8 28.Nd5 Qxf3
29.Rxf3 Rxf3 30.Bxf3 b3 31.a3 Bd4 32.Rd2 Bg7 33.Nf4 Bc3 34.Nxg6 Bxd2+ 35.
Kxd2 Kd7 36.Kc3 a5 37.h5 Ne7 38.Nxe7 Kxe7 39.g5 Ke6 40.Bg4+ Ke5 41.Bf5 c5 
42.Bh7 a4 43.h6 Ke6 44.g6 Kf6 45.g7 Kf7 46.Kd3 Rd8 47.g8=Q+ Rxg8 48.Bxg8+ 
Kxg8 49.e5 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Humerez Estrada, Cidar"]
[Black "Mangini, Jose Thiago"]
[Result "1/2-1/2"]
[ECO "B70"]
[EventDate "1957.??.??"]
[PlyCount "56"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nbd7 6.g3 g6 7.Bg2 Bg7 8.O-O 
O-O 9.h3 a6 10.Kh2 Nc5 11.f4 Qc7 12.Be3 Bd7 13.Qe1 Ne6 14.Nxe6 fxe6 15.e5 
dxe5 16.fxe5 Nh5 17.Bd4 Bc6 18.Qe2 Rad8 19.Rxf8+ Kxf8 20.Rf1+ Kg8 21.Qc4 
Rxd4 22.Qxd4 Bxe5 23.Qa7 Bxg3+ 24.Kh1 Nf4 25.Be4 Bxe4+ 26.Nxe4 Qxc2 27.
Qb8+ Kg7 28.Qe5+ Kg8 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Letelier Martner, Rene"]
[Black "Humerez Estrada, Cidar"]
[Result "1/2-1/2"]
[ECO "D61"]
[EventDate "1957.??.??"]
[PlyCount "51"]

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Be7 5.Bg5 O-O 6.e3 c6 7.Qc2 Nbd7 8.a3 dxc4
9.Bxc4 Nd5 10.Bxe7 Qxe7 11.O-O Nxc3 12.Qxc3 c5 13.Rad1 b6 14.Bb5 Bb7 15.
dxc5 Nxc5 16.Nd4 Rac8 17.f3 a6 18.Be2 Qg5 19.Rc1 h5 20.Rfd1 h4 21.Kh1 Ne4 
22.Qe1 Rxc1 23.Rxc1 Qxe3 24.Nc2 Nf2+ 25.Kg1 Nh3+ 26.Kh1 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Letelier Martner, Rene"]
[Black "Gentil, Luiz jr"]
[Result "1/2-1/2"]
[ECO "A70"]
[EventDate "1957.??.??"]
[PlyCount "123"]

1.c4 Nf6 2.Nc3 c5 3.Nf3 g6 4.d4 Bg7 5.d5 d6 6.e4 O-O 7.Bd3 e6 8.O-O exd5 
9.cxd5 a6 10.a4 Bg4 11.Qb3 Bxf3 12.gxf3 b6 13.Bg5 Nbd7 14.Nd1 Qc7 15.Ne3 
h6 16.Bh4 Nh5 17.Rfc1 Ne5 18.Be2 Nf4 19.Qd1 Nxe2+ 20.Qxe2 Rfe8 21.Rc2 Qb7 
22.Bg3 b5 23.f4 Nd7 24.f5 Ne5 25.Kh1 c4 26.Rb1 Qe7 27.axb5 axb5 28.b3 c3 
29.Rxc3 Nd7 30.Rc2 Qxe4+ 31.Kg1 Ne5 32.Bxe5 Bxe5 33.Qg4 Qxg4+ 34.Nxg4 h5 
35.Ne3 Bd4 36.fxg6 fxg6 37.Rc6 Bxe3 38.fxe3 Rxe3 39.Rxd6 Kh7 40.Kf2 Re5 
41.Rb2 Rf8+ 42.Kg1 Rf3 43.b4 Rd3 44.Rc2 Rexd5 45.Rxd5 Rxd5 46.Rc5 Rxc5 47.
bxc5 b4 48.c6 b3 49.c7 b2 50.c8=Q b1=Q+ 51.Kg2 Qe4+ 52.Kg3 Qe3+ 53.Kg2 
Qg5+ 54.Kh1 Qd5+ 55.Kg1 Kh6 56.Qb8 Qd4+ 57.Kg2 Qg4+ 58.Kf2 Qd4+ 59.Kg2 Qf6
60.Qe8 h4 61.Qe3+ g5 62.Qe4 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Letelier Martner, Rene"]
[Black "Engels, Ludwig"]
[Result "1-0"]
[ECO "E89"]
[EventDate "1957.??.??"]
[PlyCount "99"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 c6 7.Qd2 e5 8.d5 cxd5 9.
cxd5 Na6 10.Nge2 Ne8 11.g3 f5 12.Bg2 Nc5 13.O-O a5 14.Rad1 b6 15.Nc1 Ba6 
16.Rfe1 Nf6 17.exf5 gxf5 18.Bh3 Nfd7 19.Bh6 Qf6 20.Bxg7 Kxg7 21.Kh1 Kh8 
22.Bf1 Bc8 23.b3 Qg6 24.Nb5 Bb7 25.Nd3 Rae8 26.Nxc5 Nxc5 27.Qc2 Rf6 28.Bc4
Qh5 29.Rf1 Rg8 30.Qf2 Rfg6 31.Rg1 R8g7 32.Nc3 Bc8 33.Rde1 Bd7 34.a3 b5 35.
Nxb5 Bxb5 36.Bxb5 Nxb3 37.Be8 Nd4 38.Bxg6 Qxg6 39.f4 Qf7 40.fxe5 Qxd5+ 41.
Qg2 Qxg2+ 42.Kxg2 dxe5 43.Rxe5 Rc7 44.Rf1 a4 45.Rf4 Rd7 46.Ra5 Kg7 47.Rxa4
Nc2 48.Ra6 Rd3 49.Kh3 Nxa3 50.Rb4 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Letelier Martner, Rene"]
[Black "Mangini, Jose Thiago"]
[Result "1/2-1/2"]
[ECO "B66"]
[EventDate "1957.??.??"]
[PlyCount "53"]

1.e4 c5 2.Ne2 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Qd2 a6 8.O-O-O 
Bd7 9.Nb3 h6 10.Bf4 Ne5 11.f3 Qc7 12.Kb1 Be7 13.h4 O-O-O 14.Qf2 Bc6 15.Be3
Nfd7 16.Be2 b5 17.Nd4 Nc5 18.a3 Nc4 19.Nxc6 Qxc6 20.Bxc5 Qxc5 21.Qxc5+ 
dxc5 22.Bxc4 bxc4 23.h5 Kc7 24.Rxd8 Rxd8 25.Re1 Bg5 26.Rd1 Rd4 27.g3 
1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Letelier Martner, Rene"]
[Black "Rossetto, Hector Decio"]
[Result "0-1"]
[ECO "C45"]
[EventDate "1957.??.??"]
[PlyCount "122"]

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 g6 5.Nxc6 bxc6 6.Bc4 Bg7 7.Qf3 Qf6 8.
Nc3 Qxf3 9.gxf3 Rb8 10.Bd2 Ne7 11.O-O-O d6 12.h4 Be6 13.Bb3 c5 14.h5 c4 
15.Ba4+ Bd7 16.Bxd7+ Kxd7 17.b3 cxb3 18.cxb3 Nc6 19.Nd5 Nd4 20.h6 Be5 21.
f4 c6 22.Nc3 Bf6 23.e5 dxe5 24.fxe5 Bxe5 25.Be3 c5 26.f4 Bc7 27.Bxd4 cxd4 
28.Rxd4+ Kc6 29.Rhd1 Rhd8 30.Rc4+ Kb7 31.Nd5 Bd6 32.Kc2 Rbc8 33.Nf6 Rxc4+ 
34.bxc4 Kc6 35.Nxh7 Rh8 36.Ng5 Bxf4 37.Nxf7 Rh7 38.Nd8+ Kb6 39.Rb1+ Ka6 
40.Ne6 Bd6 41.Rh1 Be7 42.Kd3 Kb6 43.Ke4 Kc6 44.c5 a5 45.Rh3 a4 46.Rh1 Bf6 
47.Kf4 Re7 48.Re1 Kd5 49.Re4 a3 50.Ra4 Rxe6 51.Rxa3 Kxc5 52.h7 Rb6 53.Ra8 
Rb4+ 54.Kf3 Rh4 55.Rg8 g5 56.Rg6 Be7 57.Rg7 Kd6 58.a4 Ke6 59.a5 Kf6 60.Rg8
Rxh7 61.a6 Rh3+ 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Letelier Martner, Rene"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]
[ECO "A32"]
[EventDate "1957.??.??"]
[PlyCount "55"]

1.d4 Nf6 2.c4 c5 3.Nf3 cxd4 4.Nxd4 e6 5.Nc2 Qc7 6.e3 Be7 7.Nc3 a6 8.Be2 
Nc6 9.b3 O-O 10.O-O Rd8 11.e4 d5 12.exd5 exd5 13.Nxd5 Nxd5 14.cxd5 Bf6 15.
Rb1 Bf5 16.Bb2 Bxb2 17.Rxb2 Qe5 18.Qc1 Ne7 19.Ne3 Rac8 20.Qa1 Nxd5 21.Nxd5
Qxd5 22.Bf3 Qb5 23.b4 h6 24.Rc1 Bd3 25.h3 b6 26.Rd2 Bc4 27.Rxd8+ Rxd8 28.
a3 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Letelier Martner, Rene"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "E80"]
[EventDate "1957.??.??"]
[PlyCount "80"]

1.c4 Nf6 2.Nc3 g6 3.d4 Bg7 4.e4 d6 5.f3 e5 6.Be3 exd4 7.Qxd4 O-O 8.Qd2 Nc6
9.Nge2 Ne5 10.Nd4 Re8 11.O-O-O a6 12.h3 Bd7 13.Kb1 Qb8 14.Be2 b5 15.cxb5 
axb5 16.Ndxb5 Qb7 17.Qc2 d5 18.Bg5 Bxb5 19.Bxb5 c6 20.Ba4 Nfd7 21.exd5 Nc5
22.dxc6 Nxc6 23.Bxc6 Qxc6 24.Nd5 Qa6 25.Nb4 Qb5 26.a3 Na4 27.Rd5 Qb7 28.
Bc1 Rec8 29.Qd3 Nc5 30.Qd1 Bf8 31.Re1 Na4 32.Rd7 Qb6 33.Qd5 Qf6 34.Qd4 
Qf5+ 35.Qd3 Qf6 36.Nd5 Rxc1+ 37.Kxc1 Qxb2+ 38.Kd1 Nc5 39.Qc2 Qxc2+ 40.Kxc2
Nxd7 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Ley, Manuel Madeira de"]
[Black "Letelier Martner, Rene"]
[Result "0-1"]
[ECO "D73"]
[EventDate "1957.??.??"]
[PlyCount "84"]

1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d5 5.Nf3 dxc4 6.Qa4+ Nfd7 7.Qxc4 Nb6 8.Qd3
Nc6 9.Bf4 Nxd4 10.Nc3 Bf5 11.e4 Bg4 12.Nxd4 Bxd4 13.Qb5+ Bd7 14.Qd3 e5 15.
Be3 Bxe3 16.Qxe3 f6 17.Rd1 Qe7 18.Qh6 O-O-O 19.O-O c6 20.Qe3 Bg4 21.Rb1 
Kb8 22.b3 Rd4 23.a4 Qb4 24.Rfc1 Rhd8 25.Bf1 Be6 26.a5 Qxa5 27.Rc2 Qb4 28.
Rcb2 Nd7 29.Bc4 Nc5 30.Ra2 Bc8 31.Kg2 b5 32.Be2 Be6 33.Rba1 R8d7 34.Bd1 a6
35.Bc2 Kb7 36.Ne2 Rd2 37.Nc3 Qd4 38.Qf3 h5 39.h4 Rf7 40.Ne2 Qd6 41.b4 Bxa2
42.Rxa2 Nd3 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Ley, Manuel Madeira de"]
[Black "Gentil, Luiz jr"]
[Result "1/2-1/2"]
[ECO "E65"]
[EventDate "1957.??.??"]
[PlyCount "39"]

1.c4 Nf6 2.Nc3 g6 3.g3 Bg7 4.Bg2 O-O 5.d4 d6 6.Nf3 c5 7.dxc5 dxc5 8.Qxd8 
Rxd8 9.O-O Nc6 10.Be3 Be6 11.Bxc5 Bxc4 12.Rfd1 Nd5 13.Nxd5 Bxd5 14.Rd2 
Bxf3 15.Rxd8+ Rxd8 16.Bxf3 Rd2 17.Rb1 Bd4 18.Bxd4 Nxd4 19.Bxb7 Nxe2+ 20.
Kf1 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Ley, Manuel Madeira de"]
[Black "Cantero, Ronaldo"]
[Result "1-0"]
[ECO "E85"]
[EventDate "1957.??.??"]
[PlyCount "127"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.Nge2 Ne8 8.g4 Nc6 
9.d5 Nd4 10.Nxd4 exd4 11.Bxd4 f5 12.gxf5 gxf5 13.Qd2 fxe4 14.fxe4 Qh4+ 15.
Bf2 Rxf2 16.Qxf2 Bxc3+ 17.bxc3 Qxe4+ 18.Qe2 Qh4+ 19.Kd2 Nf6 20.Rg1+ Kh8 
21.Re1 Bf5 22.Qe3 Bg6 23.Qd4 Qxh2+ 24.Rg2 Qh6+ 25.Kd1 Qh5+ 26.Kc1 Qh6+ 27.
Kb2 Qg7 28.Re6 Ne8 29.Re7 Qxd4 30.cxd4 b5 31.Rf2 Ng7 32.Rxc7 bxc4 33.Bxc4 
Nf5 34.Kc3 a5 35.a4 Rb8 36.Bb5 Ne3 37.Kd2 Nxd5 38.Rd7 Rc8 39.Bd3 Bxd3 40.
Kxd3 Nb4+ 41.Ke2 h5 42.Rf5 d5 43.Rxh5+ Kg8 44.Rhh7 Rc4 45.Rh4 Nc6 46.Rxd5 
Rxa4 47.Rd6 Ne5 48.Re4 Ra2+ 49.Kd1 Nf7 50.Rg6+ Kf8 51.Rf4 Rb2 52.Rgf6 Rb7 
53.Ra6 Ke7 54.Rxa5 Ke6 55.Kc2 Nd6 56.Kc3 Rc7+ 57.Kd3 Rb7 58.Rh4 Rb3+ 59.
Kc2 Rb6 60.Rh6+ Kd7 61.d5 Rb8 62.Ra7+ Nb7 63.Rh7+ Kc8 64.d6 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Ley, Manuel Madeira de"]
[Black "Mangini, Jose Thiago"]
[Result "0-1"]
[ECO "B98"]
[EventDate "1957.??.??"]
[PlyCount "118"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 Qc7
9.O-O-O Nc6 10.Nb3 Bd7 11.Be2 O-O-O 12.Bh4 Na5 13.Bf2 Nxb3+ 14.axb3 Bc6 
15.Qe3 b5 16.Bf3 Nd7 17.Rd2 h6 18.Kb1 Qb7 19.Rhd1 Rhe8 20.Qa7 Qxa7 21.Bxa7
Kb7 22.Be3 Nf6 23.e5 dxe5 24.fxe5 Bxf3 25.gxf3 Nh7 26.Ne4 Rxd2 27.Rxd2 Kc6
28.c4 Rd8 29.Rxd8 Bxd8 30.Kc2 Nf8 31.f4 Ng6 32.Kd3 Be7 33.Ng3 f5 34.Ne2 
Bc5 35.Bxc5 Kxc5 36.Kc3 b4+ 37.Kd3 a5 38.h3 Kb6 39.Ke3 Kc5 40.Nc1 Nh4 41.
Nd3+ Kc6 42.Ne1 g5 43.fxg5 hxg5 44.Nf3 Nxf3 45.Kxf3 Kc5 46.Ke3 a4 47.bxa4 
Kxc4 48.b3+ Kd5 49.Kd3 Kxe5 50.Ke3 Kd5 51.Kf3 e5 52.Ke3 e4 53.Ke2 Kd4 54.
Kd2 g4 55.h4 g3 56.Ke1 Ke3 57.Kf1 Kf3 58.a5 e3 59.a6 g2+ 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Ley, Manuel Madeira de"]
[Black "Silva, Luiz Tavares da"]
[Result "0-1"]
[ECO "A02"]
[EventDate "1957.??.??"]
[PlyCount "68"]

1.f4 Nf6 2.Nf3 g6 3.e3 Bg7 4.Be2 d6 5.O-O O-O 6.Nc3 c5 7.e4 Nc6 8.Qe1 a6 
9.d3 b5 10.Rb1 Bg4 11.Be3 Nd7 12.Qh4 Bxf3 13.Rxf3 e6 14.Qh3 Nd4 15.Bxd4 
cxd4 16.Nd1 Rc8 17.c3 dxc3 18.bxc3 Bxc3 19.Nxc3 Rxc3 20.Qh6 Qb6+ 21.Kh1 
Qd4 22.e5 Rfc8 23.Rbf1 Rc1 24.h4 Rxf1+ 25.Bxf1 dxe5 26.h5 exf4 27.Rxf4 Qg7
28.Qg5 Rc5 29.Qd8+ Nf8 30.hxg6 hxg6 31.Rd4 Rh5+ 32.Kg1 Qe5 33.Re4 Qh2+ 34.
Kf2 Rf5+ 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Ley, Manuel Madeira de"]
[Black "Rubio Aguado, Fernando"]
[Result "1/2-1/2"]
[ECO "B96"]
[EventDate "1957.??.??"]
[PlyCount "149"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Nbd7 8.Qf3 
Qc7 9.O-O-O b5 10.a3 Bb7 11.Bd3 Be7 12.Rd2 O-O 13.Re1 Nc5 14.Kb1 Rac8 15.
Qg3 Nxd3 16.Qxd3 Rfd8 17.Qg3 Qc4 18.Qd3 Qc5 19.Nb3 Qc7 20.Re3 d5 21.exd5 
Nxd5 22.Bxe7 Nxe7 23.Qf1 Rxd2 24.Nxd2 Nd5 25.Rf3 b4 26.axb4 Nxb4 27.Rg3 
Bd5 28.Qf2 Qa5 29.Qd4 g6 30.Nde4 Bxe4 31.Qxe4 Rd8 32.Qe2 Qc5 33.Re3 Rb8 
34.g4 Qb6 35.b3 Qd4 36.Rf3 Qg1+ 37.Rf1 Qd4 38.Rf3 Qg1+ 39.Rf1 Qc5 40.Qe5 
Qxe5 41.fxe5 Nc6 42.Re1 h6 43.h3 Rb4 44.Kb2 Rf4 45.Re3 Kf8 46.Na4 Ke7 47.
Nc5 a5 48.c3 Rf1 49.Nd3 Kd7 50.Ne1 Kc7 51.Ka3 Kb6 52.Nd3 Kb5 53.Kb2 h5 54.
gxh5 gxh5 55.c4+ Kb6 56.Kc3 h4 57.Ne1 Rf5 58.Nf3 Rf4 59.Ne1 Rf5 60.Nf3 Kc5
61.Nxh4 Rh5 62.Ng2 Rxe5 63.Rxe5+ Nxe5 64.h4 Ng4 65.h5 e5 66.Ne3 Nh6 67.Nd5
f5 68.Kd3 Ng4 69.Ne3 Nh6 70.Nd5 Ng4 71.Ne7 e4+ 72.Ke2 f4 73.Nf5 a4 74.bxa4
Kxc4 75.h6 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Ley, Manuel Madeira de"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "E86"]
[EventDate "1957.??.??"]
[PlyCount "54"]

1.c4 Nf6 2.Nc3 g6 3.d4 Bg7 4.e4 d6 5.f3 c6 6.Be3 O-O 7.Qd2 e5 8.Nge2 exd4 
9.Nxd4 d5 10.e5 Ne8 11.f4 f6 12.Nf3 fxe5 13.fxe5 Bg4 14.Be2 Bxf3 15.gxf3 
Bxe5 16.cxd5 Nf6 17.dxc6 Qxd2+ 18.Kxd2 Nxc6 19.Rad1 Rfe8 20.Bc4+ Kg7 21.
Rde1 a6 22.Kc1 Rac8 23.Bb3 Nb4 24.Kb1 Nd3 25.Re2 Bxc3 26.bxc3 Nf4 27.Ree1 
Ng2 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Mangini, Jose Thiago"]
[Black "Rubio Aguado, Fernando"]
[Result "1-0"]
[ECO "B95"]
[EventDate "1957.??.??"]
[PlyCount "79"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.Qf3 Nbd7 8.Be2 
Qc7 9.O-O b5 10.Qe3 b4 11.Nd1 Bb7 12.Bd3 Be7 13.c3 bxc3 14.Nxc3 O-O 15.
Rac1 Qb6 16.Nb3 Qxe3 17.Bxe3 Ne5 18.Bb1 Nc4 19.Rfe1 Rfc8 20.Re2 Ng4 21.Bf4
Bf6 22.h3 Nge5 23.Bg3 g5 24.Na4 Rc6 25.Nd4 Rcc8 26.Rd1 Bc6 27.Nxc6 Rxc6 
28.b3 Na3 29.Red2 Rac8 30.Bd3 Kf8 31.Bf1 Ke7 32.f3 Bg7 33.Be1 Bh6 34.Rxd6 
Rxd6 35.Bb4 Ke8 36.Bxd6 Rd8 37.Nb2 Rxd6 38.Rxd6 a5 39.Ra6 g4 40.Rxa5 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Mangini, Jose Thiago"]
[Black "Perez Alcocer, Jose"]
[Result "1-0"]
[ECO "C60"]
[EventDate "1957.??.??"]
[PlyCount "83"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 g6 4.d4 Nxd4 5.Nxd4 exd4 6.Qxd4 Qf6 7.Qd3 Bg7 8.
O-O c6 9.Bc4 b5 10.Bb3 a5 11.a4 b4 12.Rd1 Ne7 13.Nd2 O-O 14.Nf3 h6 15.Qd6 
Qxd6 16.Rxd6 Rd8 17.Be3 Bxb2 18.Rad1 Bg7 19.h4 Bf8 20.Bc5 Re8 21.Nh2 Bg7 
22.f4 Bc3 23.Ng4 Kg7 24.h5 Ng8 25.hxg6 fxg6 26.e5 Ne7 27.Rxd7 Bxd7 28.Rxd7
Rad8 29.Rxd8 Rxd8 30.Bxe7 Rd1+ 31.Kh2 h5 32.Nf6 Bd4 33.Ne8+ Kh7 34.Bg5 
Bg1+ 35.Kh3 Bf2 36.g3 Rg1 37.Bh4 g5 38.fxg5 Re1 39.e6 Kg6 40.Bc4 Kf5 41.
Nd6+ Ke5 42.g6 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Mangini, Jose Thiago"]
[Black "Esposito, Alfredo"]
[Result "1/2-1/2"]
[ECO "C09"]
[EventDate "1957.??.??"]
[PlyCount "130"]

1.e4 e6 2.d4 d5 3.Nd2 c5 4.exd5 exd5 5.Bb5+ Nc6 6.Ngf3 Bd6 7.dxc5 Bxc5 8.
O-O Ne7 9.Nb3 Bd6 10.Nbd4 O-O 11.Bd3 Ng6 12.Bg5 f6 13.Be3 Nge5 14.Bf5 Re8 
15.c3 g6 16.Bxc8 Rxc8 17.Qb3 Nxd4 18.Nxd4 Bb8 19.Qxb7 Ng4 20.g3 Nxe3 21.
fxe3 f5 22.Nc2 Re7 23.Qb5 Be5 24.Rad1 Rd7 25.Nb4 Rb8 26.Qe2 Rb6 27.Qf3 
Rbd6 28.Rd2 a5 29.Nd3 Bg7 30.Nf4 Bh6 31.Rfd1 Bxf4 32.exf4 Qb6+ 33.Qf2 Qb5 
34.Re1 Rb7 35.Qd4 Qb6 36.Qxb6 Rdxb6 37.Ree2 a4 38.a3 Kf7 39.Kf2 h6 40.Ke1 
g5 41.Rxd5 Rxb2 42.Rxf5+ Kg6 43.Ra5 Rxe2+ 44.Kxe2 Rb3 45.fxg5 hxg5 46.Kd3 
Rxa3 47.h4 gxh4 48.gxh4 Ra1 49.Kc2 Ra2+ 50.Kd3 a3 51.Kc4 Rh2 52.Rxa3 Rxh4+
53.Kb5 Rh5+ 54.Kb4 Kf6 55.c4 Ke7 56.Rd3 Rh8 57.c5 Rd8 58.Rh3 Kd7 59.Rh6 
Kc7 60.Kb5 Rb8+ 61.Rb6 Rxb6+ 62.cxb6+ Kb7 63.Kc5 Kb8 64.Kc6 Kc8 65.b7+ Kb8
1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Mangini, Jose Thiago"]
[Black "Cruz, Walter Oswaldo"]
[Result "1-0"]
[ECO "C97"]
[EventDate "1957.??.??"]
[PlyCount "135"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.c3 d6 
9.h3 Na5 10.Bc2 c5 11.d4 Qc7 12.Nbd2 Re8 13.Nf1 Bd7 14.Ne3 g6 15.a4 Bf8 
16.axb5 axb5 17.dxe5 dxe5 18.Nh2 c4 19.Qf3 Bg7 20.Nhg4 Nxg4 21.hxg4 Be6 
22.Nf5 Bf8 23.Nh6+ Bxh6 24.Bxh6 Qe7 25.g5 Nb7 26.Red1 Nc5 27.Kh2 Bd7 28.
Rxa8 Rxa8 29.Rd5 Ra6 30.Qd1 Ra7 31.Qd2 Be8 32.Qe3 Rc7 33.Qg3 Nd7 34.Rxb5 
Rc5 35.Rb7 Ra5 36.Bd1 Qd6 37.Bg4 Nc5 38.Rb4 Bb5 39.Qf3 Nd3 40.Qd1 Qc7 41.
Qf3 Qe7 42.Bd7 Nxb4 43.cxb4 f5 44.gxf6 Qxd7 45.bxa5 Kf7 46.Bg5 Qd3 47.Qh3 
Qxh3+ 48.Kxh3 Bc6 49.f3 Bb7 50.Kg3 h6 51.Bxh6 Kxf6 52.Kh4 Ba6 53.Bg5+ Ke6 
54.Bd8 Kd7 55.Bb6 Ke6 56.Kg5 c3 57.bxc3 Bf1 58.g3 Be2 59.f4 Bd3 60.Kxg6 
exf4 61.gxf4 Bxe4+ 62.Kg5 Bd3 63.Bd4 Kf7 64.f5 Bc4 65.Kf4 Bd3 66.Ke5 Ke7 
67.f6+ Kf7 68.Kd5 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Mangini, Jose Thiago"]
[Black "Cantero, Ronaldo"]
[Result "0-1"]
[ECO "B95"]
[EventDate "1957.??.??"]
[PlyCount "98"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qd2 O-O
9.O-O-O Qc7 10.Bd3 Nbd7 11.Qe2 b5 12.e5 dxe5 13.Bxf6 Nxf6 14.fxe5 Nd5 15.
Nxd5 exd5 16.Rhf1 Qb6 17.Kb1 b4 18.h4 a5 19.h5 a4 20.Qf3 b3 21.cxb3 axb3 
22.Nxb3 Be6 23.Qf2 d4 24.Qxd4 Qxd4 25.Nxd4 Bxa2+ 26.Kc2 Rac8+ 27.Kd2 Rfd8 
28.Nf5 Bg5+ 29.Ke2 Rb8 30.Kf2 Rxb2+ 31.Kg3 Bb3 32.Nd6 Bxd1 33.Rxd1 Be7 34.
Nf5 Rb3 35.Nxe7+ Kf8 36.Nf5 Rbxd3+ 37.Rxd3 Rxd3+ 38.Kf4 Ra3 39.g3 g6 40.
hxg6 hxg6 41.Ne3 Ra4+ 42.Kg5 Re4 43.Ng4 Ke7 44.Kh4 Ke6 45.Kg5 Ra4 46.Nh6 
Rb4 47.g4 Re4 48.Kh4 Rxe5 49.g5 Re4+ 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Mangini, Jose Thiago"]
[Black "Gentil, Luiz jr"]
[Result "1-0"]
[ECO "B67"]
[EventDate "1957.??.??"]
[PlyCount "85"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.Qd2 h6 8.Be3 Ng4
9.O-O-O Nxe3 10.Qxe3 Nc6 11.f4 Be7 12.Nf3 Qc7 13.Kb1 Bd7 14.g3 Na5 15.Qd4 
O-O 16.e5 d5 17.f5 Rfc8 18.f6 Bf8 19.Bd3 Nc6 20.Qf4 gxf6 21.exf6 Qxf4 22.
gxf4 Bc5 23.Rd2 Kh8 24.Rg2 Rg8 25.Rg3 Bd6 26.Ng5 Be8 27.Rh3 Bf8 28.a3 Nb8 
29.Nxd5 exd5 30.Re1 Rxg5 31.Rxe8 Rg8 32.c4 b6 33.cxd5 b5 34.d6 Ra7 35.Rxb8
Rd7 36.Rb6 Rg1+ 37.Ka2 Rxd6 38.Rxh6+ Kg8 39.Bh7+ Kh8 40.Rb8 Rg8 41.Rh5 
Rxf6 42.Bxg8+ Kxg8 43.Rg5+ 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Mangini, Jose Thiago"]
[Black "Sanguineti, Raul"]
[Result "0-1"]
[ECO "B97"]
[EventDate "1957.??.??"]
[PlyCount "134"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 8.Bxf6 
gxf6 9.Qd2 Qxb2 10.Rb1 Qa3 11.f5 Nc6 12.fxe6 fxe6 13.Nxc6 bxc6 14.Be2 Be7 
15.Bh5+ Kd8 16.e5 fxe5 17.Ne4 d5 18.O-O Bd7 19.Ng5 Kc7 20.Bg4 Bc5+ 21.Kh1 
Qe3 22.Qa5+ Bb6 23.Qb4 Qc5 24.Qxc5 Bxc5 25.Rf7 Be3 26.Bxe6 Rad8 27.Nxh7 
Kd6 28.Bxd7 Rxd7 29.Rxd7+ Kxd7 30.Rb7+ Ke6 31.g4 d4 32.Kg2 e4 33.h4 d3 34.
cxd3 exd3 35.Kf3 Bc1 36.Ng5+ Kd5 37.Rd7+ Kc4 38.Nf7 Rf8 39.g5 d2 40.g6 Kc3
41.h5 Kc2 42.h6 Bb2 43.Ke4 d1=Q 44.Rxd1 Kxd1 45.g7 Bxg7 46.hxg7 Rg8 47.Ne5
Rxg7 48.Nxc6 Rb7 49.a4 Kc2 50.Kd4 Kb2 51.Kc5 Ka3 52.a5 Ka4 53.Kc4 Rb5 54.
Nd4 Rxa5 55.Nb3 Rh5 56.Nc5+ Ka5 57.Nb3+ Kb6 58.Kb4 Rh4+ 59.Ka3 Kb5 60.Nc1 
Rh3+ 61.Kb2 Kc4 62.Na2 Rh2+ 63.Kb1 Rd2 64.Nc1 a5 65.Na2 a4 66.Ka1 Kb3 67.
Nc1+ Kc2 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Najdorf, Miguel"]
[Black "Gentil, Luiz jr"]
[Result "1-0"]
[ECO "E92"]
[EventDate "1957.??.??"]
[PlyCount "83"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 e5 6.d5 c5 7.Nf3 O-O 8.h3 Nh5 9.
g3 h6 10.Nh2 Nf6 11.g4 Ne8 12.Be3 Nd7 13.Qd2 Kh7 14.h4 Rh8 15.Nf1 Kg8 16.
Ng3 a6 17.a3 Rb8 18.b4 b6 19.Rb1 Ra8 20.Kf1 Qc7 21.Kg2 Qd8 22.Rb2 Qc7 23.
h5 g5 24.Rhb1 Bf6 25.Nf5 Kh7 26.bxc5 bxc5 27.Qc2 Ng7 28.Ng3 Be7 29.f3 f6 
30.Bd2 Re8 31.Qa4 Nb8 32.Rb6 Nd7 33.Qc6 Qxc6 34.Rxc6 Ra7 35.Nf5 Nxf5 36.
exf5 Nf8 37.Ne4 Rd7 38.Rb8 Rdd8 39.Ba5 Bd7 40.Bxd8 Bxc6 41.Bxe7 Rxb8 42.
dxc6 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Najdorf, Miguel"]
[Black "Engels, Ludwig"]
[Result "1-0"]
[ECO "B22"]
[EventDate "1957.??.??"]
[PlyCount "55"]

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.cxd5 Nxd5 6.e3 Nc6 7.Bc4 Nxc3 8.bxc3 
cxd4 9.exd4 Bd6 10.O-O O-O 11.Bd3 Be7 12.Qc2 g6 13.Re1 Bd7 14.Bh6 Re8 15.
Qd2 Qa5 16.Rab1 Qc7 17.Bf4 Qc8 18.h4 b6 19.h5 Bf6 20.Bg5 Bg7 21.hxg6 fxg6 
22.Qf4 Qb8 23.Qh4 Rf8 24.Re3 Qd6 25.Nd2 Rf7 26.Rh3 Nxd4 27.Qxh7+ Kf8 28.
Bh6 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Najdorf, Miguel"]
[Black "Cantero, Ronaldo"]
[Result "0-1"]
[ECO "E54"]
[EventDate "1957.??.??"]
[PlyCount "85"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Bd3 O-O 6.Nf3 d5 7.O-O dxc4 8.Bxc4 a6
9.a4 Nc6 10.Na2 cxd4 11.Nxb4 Nxb4 12.exd4 h6 13.b3 Re8 14.Ne5 b6 15.Ba3 
Nbd5 16.Re1 Bb7 17.Bf1 Rc8 18.Nc4 Rc6 19.Qd2 Qb8 20.a5 b5 21.Ne5 Rcc8 22.
Bc5 Ba8 23.b4 Qc7 24.Ra3 Ne7 25.Bd3 Qb7 26.f3 Qc7 27.Bb1 Ned5 28.f4 Nd7 
29.Rg3 f5 30.Ra3 N7f6 31.Rf1 Qb7 32.Qe2 Nc7 33.h3 Ne4 34.Kh2 Nf6 35.g4 
Ncd5 36.Raf3 fxg4 37.hxg4 g5 38.fxg5 hxg5 39.Rxf6 Nxf6 40.Qd2 Ne4 41.Qc1 
Qh7+ 42.Kg1 Qh4 43.Rf3 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Najdorf, Miguel"]
[Black "Humerez Estrada, Cidar"]
[Result "1/2-1/2"]
[ECO "A34"]
[EventDate "1957.??.??"]
[PlyCount "84"]

1.c4 c5 2.g3 Nf6 3.Bg2 d5 4.cxd5 Nxd5 5.Nc3 Nc7 6.d3 e5 7.Qb3 Nc6 8.Bxc6+ 
bxc6 9.Nf3 f6 10.Qa4 Bd7 11.Ne4 Nd5 12.Nfd2 f5 13.Nc3 Be7 14.Nc4 Nb6 15.
Qa5 Nxc4 16.Qxd8+ Rxd8 17.dxc4 Be6 18.b3 Bf6 19.Na4 e4 20.Bb2 Bd4 21.Rd1 
O-O 22.Ba3 e3 23.fxe3 Bxe3 24.Rxd8 Rxd8 25.Bxc5 f4 26.gxf4 Bxf4 27.e3 Bg4 
28.O-O Be5 29.Be7 Re8 30.Bg5 h6 31.Bf4 Bf6 32.Kg2 Bh4 33.Nc5 Be2 34.Rc1 
Bh5 35.Rc3 Bg6 36.b4 Be1 37.Rb3 Bf7 38.Nd3 Bxc4 39.Nxe1 Bxb3 40.axb3 g5 
41.Bd6 Rxe3 42.Nf3 Rxb3 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Najdorf, Miguel"]
[Black "Rossetto, Hector Decio"]
[Result "1/2-1/2"]
[ECO "E07"]
[EventDate "1957.??.??"]
[PlyCount "60"]

1.c4 Nf6 2.g3 e6 3.Bg2 d5 4.Nf3 c6 5.b3 Nbd7 6.O-O Be7 7.d4 O-O 8.Nc3 b6 
9.Bb2 Bb7 10.Rc1 Rc8 11.e3 Qc7 12.cxd5 Nxd5 13.Nxd5 exd5 14.Ne1 Qd6 15.Nd3
Ba6 16.Re1 f5 17.Re2 Nf6 18.Rec2 Bxd3 19.Qxd3 Qe6 20.Qa6 Rc7 21.Ba3 Bxa3 
22.Qxa3 Ne4 23.Qa6 Qd6 24.Qe2 Rfc8 25.Qf3 g6 26.Bf1 Kg7 27.Qf4 Qxf4 28.
gxf4 c5 29.f3 Nf6 30.Kf2 a5 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Najdorf, Miguel"]
[Black "Panno, Oscar"]
[Result "1-0"]
[ECO "B16"]
[EventDate "1957.??.??"]
[PlyCount "95"]

1.e4 c6 2.Nf3 d5 3.Nc3 dxe4 4.Nxe4 Nf6 5.Nxf6+ gxf6 6.d4 Bg4 7.Be2 Qc7 8.
h3 Bh5 9.Nh4 Bxe2 10.Qxe2 Nd7 11.O-O e6 12.c4 O-O-O 13.b4 Bxb4 14.Rb1 c5 
15.Qf3 Qc6 16.d5 Qa6 17.a3 Ba5 18.Bf4 Bc7 19.Bxc7 Kxc7 20.Rfd1 Rhe8 21.
Qf4+ Kc8 22.Nf3 e5 23.Qe4 f5 24.Qxf5 Qxc4 25.Ng5 f6 26.Nf7 Qa6 27.Nxd8 
Kxd8 28.Qxh7 b5 29.Qe4 Qb7 30.h4 Rh8 31.g3 a6 32.Qf5 Qb6 33.Qe6 Kc7 34.d6+
Kc8 35.Rdc1 Qc6 36.a4 Kb7 37.Rb2 Kb6 38.axb5 axb5 39.Rcb1 b4 40.Qc4 Kb7 
41.Ra1 Qxd6 42.Qe4+ Kb6 43.Rba2 Nb8 44.Qa8 Rd8 45.h5 Qd3 46.Qa5+ Kc6 47.
Rc1 Rd5 48.Qa8+ 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Najdorf, Miguel"]
[Black "Mangini, Jose Thiago"]
[Result "1-0"]
[ECO "E43"]
[EventDate "1957.??.??"]
[PlyCount "67"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 b6 6.Nf3 Bb7 7.O-O Bxc3 8.bxc3 
d6 9.Nd2 e5 10.e4 Re8 11.f3 Nbd7 12.Nb3 Nf8 13.a4 Ne6 14.g3 Qd7 15.a5 c5 
16.d5 Nc7 17.Ra2 b5 18.Bg5 bxc4 19.Bxc4 Ba6 20.Bxa6 Nxa6 21.Bxf6 gxf6 22.
f4 c4 23.Nd2 Nc5 24.Qh5 Kg7 25.Qh4 Qe7 26.Nxc4 exf4 27.Rxf4 Nxe4 28.Re2 f5
29.Qxe7 Rxe7 30.Nxd6 Nxd6 31.Rxe7 Kf6 32.Rc7 Rc8 33.Rxc8 Nxc8 34.Rc4 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Panno, Oscar"]
[Black "Gentil, Luiz jr"]
[Result "1-0"]
[ECO "E62"]
[EventDate "1957.??.??"]
[PlyCount "81"]

1.c4 Nf6 2.Nc3 g6 3.g3 Bg7 4.Bg2 O-O 5.d4 d6 6.Nf3 Nc6 7.O-O Bg4 8.Be3 e5 
9.d5 Bxf3 10.exf3 Ne7 11.f4 Nd7 12.Bh3 f5 13.Rc1 b6 14.Bg2 a6 15.fxe5 Nxe5
16.Ne2 Qd7 17.Nf4 Bf6 18.Re1 Rf7 19.Bd4 Re8 20.Ne6 Nc8 21.f4 Ng4 22.Rc3 
Qe7 23.h3 Bxd4+ 24.Qxd4 Qf6 25.Qd1 Nh6 26.Qa4 Rfe7 27.Qxa6 Nf7 28.Kh2 h5 
29.h4 Nh6 30.Bf3 Ng4+ 31.Bxg4 fxg4 32.Qa4 b5 33.Qxb5 Nb6 34.Rce3 Nd7 35.b3
Ra8 36.R3e2 Qc3 37.Qb7 Rae8 38.Re3 Qd2+ 39.R1e2 Qd1 40.Qb4 Ra8 41.Qd2 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Panno, Oscar"]
[Black "Humerez Estrada, Cidar"]
[Result "1-0"]
[ECO "D67"]
[EventDate "1957.??.??"]
[PlyCount "82"]

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 Nbd7 6.Nf3 O-O 7.Rc1 c6 8.Bd3 
dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.Ne4 N5f6 12.Ng3 Re8 13.O-O b5 14.Bd3 Bb7 
15.Qe2 Rac8 16.e4 e5 17.Nf5 Qf8 18.dxe5 Nxe5 19.Nxe5 Rxe5 20.f4 Rxf5 21.
exf5 Qb4 22.Kh1 h5 23.h3 a6 24.a3 Qd6 25.Rcd1 Qc7 26.Qe5 Qb6 27.Rfe1 c5 
28.Bf1 c4 29.Qd4 Qc6 30.Qd6 Ne4 31.Qxc6 Bxc6 32.Kg1 h4 33.Be2 Nc5 34.Rd6 
Be4 35.Bg4 f6 36.Rd4 Bd3 37.Be2 Kf8 38.Bxd3 Nxd3 39.Re2 Re8 40.Rxe8+ Kxe8 
41.b3 Nb2 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Panno, Oscar"]
[Black "Cantero, Ronaldo"]
[Result "1-0"]
[ECO "E64"]
[EventDate "1957.??.??"]
[PlyCount "89"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.g3 O-O 5.Bg2 d6 6.Nf3 c5 7.d5 e5 8.dxe6 fxe6 
9.O-O Nc6 10.Ng5 Ne5 11.Qb3 Nc6 12.Nce4 Qc7 13.Bf4 e5 14.Bd2 Bg4 15.e3 
Nxe4 16.Nxe4 Rad8 17.h3 Bc8 18.Rad1 Ne7 19.Bc1 b6 20.Nc3 Bd7 21.Nb5 Bxb5 
22.Qxb5 Rf6 23.Rd2 Re6 24.Be4 Rf6 25.Qb3 Nf5 26.Rfd1 Bf8 27.Qd3 Be7 28.b3 
Rff8 29.Bb2 h6 30.Qe2 Kh7 31.Kh2 Qc8 32.Qg4 h5 33.Qe2 Qe6 34.g4 hxg4 35.
Qxg4 Qf7 36.Rg1 Kg7 37.Re2 Rde8 38.f4 Qf6 39.Kh1 Bd8 40.fxe5 dxe5 41.Rf2 
Kh6 42.Bc1 Qg5 43.Qxg5+ Bxg5 44.Rfg2 Nd6 45.Bc6 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Panno, Oscar"]
[Black "Engels, Ludwig"]
[Result "1-0"]
[ECO "A34"]
[EventDate "1957.??.??"]
[PlyCount "133"]

1.d4 e6 2.Nf3 c5 3.g3 Nc6 4.Bg2 Qb6 5.e3 Nf6 6.O-O d6 7.c4 Be7 8.Nc3 O-O 
9.b3 Bd7 10.Bb2 Rfd8 11.Qe2 Na5 12.Rfd1 a6 13.e4 cxd4 14.Nxd4 Ne8 15.Nc2 
Rac8 16.Ne3 Bf8 17.Rac1 Qa7 18.Qd2 Nc6 19.Ne2 b5 20.Nd4 Qb6 21.Bc3 b4 22.
Bb2 Nxd4 23.Bxd4 Qb7 24.Nc2 Rb8 25.Qe3 Rdc8 26.Rd2 a5 27.Bb2 Qa8 28.e5 Bc6
29.Bxc6 Qxc6 30.Rcd1 dxe5 31.Bxe5 Rb7 32.Qf4 f6 33.Bb2 e5 34.Qf5 Bc5 35.
Rd5 Re7 36.Bc1 Qe6 37.Ne3 Qxf5 38.Nxf5 Ra7 39.Be3 Bxe3 40.Nxe3 Rcc7 41.Rb5
Rc6 42.Rdd5 Rca6 43.c5 Nc7 44.Rb8+ Kf7 45.Rd7+ Kg6 46.Rb6 Na8 47.Rxa6 Rxa6
48.Nd5 Kf5 49.Rxg7 Ke4 50.Rd7 Rc6 51.Kg2 Rxc5 52.Nxf6+ Kf5 53.Nxh7 Nb6 54.
Rf7+ Ke4 55.Nf6+ Kd3 56.h4 Kc2 57.h5 Nd5 58.h6 Nxf6 59.Rxf6 Kb2 60.h7 Rc8 
61.g4 Rh8 62.Rh6 a4 63.bxa4 Kxa2 64.g5 b3 65.g6 b2 66.Rh1 Rc8 67.g7 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Panno, Oscar"]
[Black "Perez Alcocer, Jose"]
[Result "1-0"]
[ECO "A81"]
[EventDate "1957.??.??"]
[PlyCount "61"]

1.d4 f5 2.g3 Nf6 3.Bg2 e6 4.Nf3 Be7 5.O-O O-O 6.b3 c6 7.e3 d6 8.Nbd2 a5 9.
a4 Na6 10.Ba3 Nb4 11.c3 Nbd5 12.Qc2 Bd7 13.Ne1 b5 14.Nd3 Rb8 15.c4 bxc4 
16.bxc4 Nb4 17.Bxb4 axb4 18.c5 d5 19.a5 Ne4 20.Rfb1 Rb5 21.a6 Qc7 22.Nxb4 
e5 23.Nxe4 fxe4 24.Qa2 Be6 25.Bxe4 exd4 26.exd4 Bf6 27.Nc2 Rfb8 28.Bd3 
Rxb1+ 29.Rxb1 Ra8 30.Rb7 Qd8 31.a7 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Panno, Oscar"]
[Black "Rossetto, Hector Decio"]
[Result "1-0"]
[ECO "E59"]
[EventDate "1957.??.??"]
[PlyCount "69"]

1.c4 Nf6 2.Nc3 e6 3.d4 Bb4 4.e3 O-O 5.Bd3 d5 6.Nf3 c5 7.O-O Nc6 8.a3 Bxc3 
9.bxc3 dxc4 10.Bxc4 Qc7 11.Bb2 e5 12.h3 e4 13.Nd2 Ne7 14.a4 Ng6 15.Ba3 b6 
16.Qe2 Nh4 17.dxc5 bxc5 18.Rab1 Re8 19.Rb5 Bxh3 20.gxh3 Qd7 21.f3 Rad8 22.
Rb2 exf3 23.Nxf3 Qxh3 24.Bxf7+ Kh8 25.Bxe8 Qg4+ 26.Kh2 Rxe8 27.Nxh4 Qxh4+ 
28.Kg1 Qg5+ 29.Qg2 Qxe3+ 30.Qf2 Qg5+ 31.Kh1 h6 32.Qf5 Qe3 33.Bxc5 Qxc3 34.
Rc2 Qb3 35.Rcf2 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Panno, Oscar"]
[Black "Ley, Manuel Madeira de"]
[Result "1-0"]
[ECO "D22"]
[EventDate "1957.??.??"]
[PlyCount "47"]

1.d4 d5 2.c4 dxc4 3.Nf3 a6 4.e3 Bg4 5.Bxc4 e6 6.h3 Bxf3 7.Qxf3 c6 8.O-O 
Nf6 9.Rd1 Nbd7 10.e4 Qa5 11.Nc3 Qh5 12.g4 Qa5 13.a3 g5 14.b4 Qd8 15.Bxg5 
Rg8 16.Bf4 Nh5 17.Bh2 Qh4 18.d5 cxd5 19.exd5 e5 20.d6 Nhf6 21.Ne4 Rg7 22.
Bg3 Qh6 23.Nxf6+ Nxf6 24.d7+ 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Panno, Oscar"]
[Black "Mangini, Jose Thiago"]
[Result "1-0"]
[ECO "E43"]
[EventDate "1957.??.??"]
[PlyCount "81"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Bd3 Bb7 6.Nf3 c5 7.O-O O-O 8.Na4 cxd4
9.exd4 Be7 10.Re1 d5 11.c5 Nbd7 12.b4 Ne4 13.Bb2 a6 14.Qe2 Bf6 15.Rec1 Bc6
16.Nc3 bxc5 17.bxc5 Nxc3 18.Bxc3 a5 19.a4 Qc7 20.Bb5 Rfe8 21.Qd2 e5 22.
Rab1 h6 23.Bxa5 Qc8 24.dxe5 Nxe5 25.Nxe5 Rxe5 26.Bb6 d4 27.Re1 Bxg2 28.f4 
Bf3 29.Qf2 Qg4+ 30.Qg3 Rxe1+ 31.Rxe1 Qh5 32.Rf1 Be4 33.h3 Bh4 34.Qg4 g6 
35.c6 f5 36.Qxh5 gxh5 37.Bxd4 Kf7 38.Bc4+ Ke7 39.Bc5+ Kf6 40.c7 Rc8 41.Bd6
1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Perez Alcocer, Jose"]
[Black "Letelier Martner, Rene"]
[Result "0-1"]
[ECO "C77"]
[EventDate "1957.??.??"]
[PlyCount "60"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Qe2 Bc5 6.c3 b5 7.Bc2 d6 8.d3 Qe7 
9.Nbd2 O-O 10.Nf1 Nd8 11.Ne3 g6 12.h3 Ne6 13.Nd5 Nxd5 14.exd5 Ng7 15.d4 
Bb6 16.dxe5 dxe5 17.O-O Re8 18.Re1 Qd6 19.Ng5 f5 20.Rd1 h6 21.Ne6 Kh7 22.
Qd2 g5 23.g4 e4 24.Kg2 Nxe6 25.dxe6 Qxe6 26.Bb3 Qf6 27.h4 fxg4 28.hxg5 
Qf3+ 29.Kg1 e3 30.Bc2+ Kh8 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Perez Alcocer, Jose"]
[Black "Ley, Manuel Madeira de"]
[Result "1/2-1/2"]
[ECO "C55"]
[EventDate "1957.??.??"]
[PlyCount "40"]

1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bc4 Be7 5.d3 d6 6.Nd5 O-O 7.Nxe7+ Qxe7 8.Bg5
h6 9.Be3 a6 10.h3 Na5 11.Bb3 Nxb3 12.axb3 Be6 13.c4 c5 14.Qd2 Kh7 15.Qa5 
Qd8 16.Qxd8 Rfxd8 17.Kd2 Nd7 18.g4 f6 19.Kc2 Nf8 20.Ng1 Ng6 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Perez Alcocer, Jose"]
[Black "Cruz, Walter Oswaldo"]
[Result "1-0"]
[ECO "E50"]
[EventDate "1957.??.??"]
[PlyCount "63"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Nf3 O-O 6.Be2 Ne4 7.Qc2 f5 8.O-O Bxc3
9.bxc3 b6 10.Nd2 Bb7 11.f3 Nxd2 12.Qxd2 d6 13.d5 e5 14.e4 fxe4 15.fxe4 
Rxf1+ 16.Bxf1 Nd7 17.Qg5 Nf6 18.Bd3 Bc8 19.Bd2 Bd7 20.Rf1 Qe7 21.h3 Rf8 
22.Be2 h6 23.Qe3 Be8 24.Be1 Qd7 25.Bd1 Qf7 26.Be2 Qg6 27.Bd3 Qh7 28.Bd2 
Bg6 29.Re1 b5 30.cxb5 Nxd5 31.Bc4 Bf7 32.exd5 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Perez Alcocer, Jose"]
[Black "Esposito, Alfredo"]
[Result "0-1"]
[ECO "C19"]
[EventDate "1957.??.??"]
[PlyCount "78"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Qc7 7.Nf3 Ne7 8.Bd3 b6
9.O-O Ba6 10.Bxa6 Nxa6 11.Qe2 Nb8 12.a4 O-O 13.dxc5 bxc5 14.Ba3 Nd7 15.c4 
Rfe8 16.cxd5 Nxd5 17.Qe4 Rab8 18.Ng5 Nf8 19.f4 h6 20.Nf3 Red8 21.Rae1 Ne7 
22.Rf2 Qa5 23.Qc4 Rd5 24.Rfe2 Nd7 25.Re4 Nf5 26.Kf2 Nb6 27.Qb3 Rbd8 28.c3 
Rd3 29.Rc1 Nd4 30.Nxd4 R8xd4 31.Rxd4 cxd4 32.Bb4 Qa6 33.Rd1 Nd5 34.Qb1 
Rxd1 35.Qxd1 dxc3 36.Qd4 Nxb4 37.Qxb4 c2 38.Qc3 Qb6+ 39.Ke2 Qb1 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Perez Alcocer, Jose"]
[Black "Sanguineti, Raul"]
[Result "0-1"]
[ECO "B20"]
[EventDate "1957.??.??"]
[PlyCount "74"]

1.e4 c5 2.d3 g6 3.Nf3 Bg7 4.g3 e5 5.Bg2 Ne7 6.O-O O-O 7.Nc3 d6 8.Ne1 Nbc6 
9.Be3 Be6 10.Nd5 Qd7 11.Qd2 Bh3 12.c3 Nxd5 13.exd5 Ne7 14.c4 Bxg2 15.Nxg2 
b5 16.Rab1 Rfb8 17.b4 bxc4 18.dxc4 cxb4 19.Rxb4 Nf5 20.Rfb1 Rc8 21.Rb7 Rc7
22.Rb8+ Rxb8 23.Rxb8+ Bf8 24.Qb4 Kg7 25.a4 Nd4 26.Bxd4 exd4 27.Nf4 Be7 28.
a5 Bg5 29.Nd3 Qg4 30.Qxd6 Re7 31.Qa3 Qf3 32.Rb1 Re3 33.Rb3 Re2 34.Qa1 Rd2 
35.Qxd4+ Kh6 36.Rb1 Rxd3 37.Qxa7 Be3 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Perez Alcocer, Jose"]
[Black "Silva, Luiz Tavares da"]
[Result "1/2-1/2"]
[ECO "A15"]
[EventDate "1957.??.??"]
[PlyCount "87"]

1.Nf3 g6 2.g3 Bg7 3.Bg2 Nf6 4.O-O O-O 5.d3 d5 6.Nbd2 Nc6 7.c4 e5 8.cxd5 
Nxd5 9.Nb3 Nd4 10.Bd2 b6 11.Nbxd4 exd4 12.Bg5 Qd7 13.a3 Re8 14.Re1 Bb7 15.
Qc2 c5 16.Rad1 Rac8 17.Bc1 Kh8 18.e4 dxe3 19.fxe3 Ne7 20.e4 Nc6 21.Be3 Nd4
22.Nxd4 Bxd4 23.Bxd4+ Qxd4+ 24.Qf2 Rcd8 25.Bf1 Kg7 26.Rc1 Re7 27.Rc4 Qxf2+
28.Kxf2 Ba6 29.Rc3 Rd4 30.b3 Kf6 31.Ke3 Red7 32.Be2 Ke5 33.Rf1 f6 34.Rf4 
f5 35.exf5 Rxf4 36.gxf4+ Kxf5 37.Bf3 Re7+ 38.Be4+ Kf6 39.Rc1 Bb5 40.b4 c4 
41.a4 Bxa4 42.Rxc4 Bb5 43.Rc8 Ke6 44.h4 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Perez Alcocer, Jose"]
[Black "Najdorf, Miguel"]
[Result "1-0"]
[ECO "A05"]
[EventDate "1957.??.??"]
[PlyCount "121"]

1.e4 c5 2.d3 Nc6 3.Nf3 g6 4.g3 Bg7 5.Bg2 Nf6 6.O-O O-O 7.Nbd2 d6 8.a4 h6 
9.Nc4 d5 10.exd5 Nxd5 11.a5 Be6 12.Nfd2 Rc8 13.Ne4 Nd4 14.c3 Nf5 15.f4 b5 
16.axb6 axb6 17.Qe1 Nf6 18.Ne5 Nxe4 19.Qxe4 Qd6 20.Re1 Bb3 21.Ra3 Bc2 22.
Nc4 Qxd3 23.Qxd3 Bxd3 24.Nxb6 Rcd8 25.Nd5 e6 26.Ne3 Nd6 27.Ra5 c4 28.Nf1 
Rb8 29.Nd2 Rfd8 30.Bf1 Bf8 31.Ra4 Bg7 32.Kf2 g5 33.Be2 gxf4 34.gxf4 Bf6 
35.Nf3 Ne4+ 36.Ke3 Nc5 37.Rg1+ Kf8 38.Rxc4 Bxc4 39.Bxc4 Na4 40.Rg2 Rb6 41.
Ne5 Rd1 42.Rc2 Rb7 43.Be2 Rd8 44.b4 Rc7 45.c4 Nb6 46.Bd2 Ra8 47.Ke4 Nc8 
48.Bd3 Nd6+ 49.Ke3 Ra3 50.Ke2 Nf5 51.Bc3 Rb3 52.Bxf5 exf5 53.c5 Ke7 54.Kd3
Bxe5 55.fxe5 Ke6 56.Kc4 Rb1 57.b5 f4 58.c6 Kf5 59.Kc5 f3 60.b6 Rc8 61.Bb2 
1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Perez Alcocer, Jose"]
[Black "Rubio Aguado, Fernando"]
[Result "1-0"]
[ECO "E81"]
[EventDate "1957.??.??"]
[PlyCount "137"]

1.d4 Nf6 2.c4 c5 3.d5 d6 4.Nc3 g6 5.e4 Bg7 6.f3 O-O 7.Be3 Nbd7 8.Qd2 Re8 
9.g4 a6 10.h4 h5 11.g5 Nh7 12.f4 Qa5 13.Rh2 Rb8 14.a4 Nhf8 15.Bd3 b5 16.
cxb5 c4 17.Bxc4 Qb4 18.Bd3 Nc5 19.Bxc5 Qxc5 20.Nce2 axb5 21.Bxb5 Bd7 22.
Rc1 Qa7 23.Nf3 e6 24.Kf1 exd5 25.Qxd5 Bxb5 26.axb5 Qe3 27.Nd2 Ne6 28.f5 
gxf5 29.exf5 Nf4 30.Nxf4 Qxf4+ 31.Rf2 Qxh4 32.Rc7 Kh8 33.f6 Bf8 34.Rc4 
Qh3+ 35.Qg2 Qd3+ 36.Kg1 Re1+ 37.Kh2 d5 38.Rc6 Rd8 39.Qf3 Re3 40.Qxh5+ Kg8 
41.Nf1 Re5 42.Rf3 Qe2+ 43.Kg3 Rf5 44.Ne3 Bd6+ 45.Rxd6 Rxf3+ 46.Qxf3 Qxf3+ 
47.Kxf3 Rxd6 48.Nf5 Rb6 49.Nd4 Kh7 50.Kf4 Kg6 51.Ke5 Kxg5 52.Kxd5 Kxf6 53.
Kc5 Rb8 54.b6 Kg5 55.Kc6 Rc8+ 56.Kd7 Rc4 57.Nb5 Rb4 58.Kc6 Rc4+ 59.Kd5 Rc8
60.b7 Rd8+ 61.Nd6 f5 62.Kc6 Rb8 63.Kc7 Rf8 64.b8=Q Rxb8 65.Kxb8 f4 66.Ne4+
Kf5 67.Nf2 Ke5 68.Nd3+ Kd4 69.Nxf4 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Rossetto, Hector Decio"]
[Black "Gentil, Luiz jr"]
[Result "1-0"]
[ECO "E87"]
[EventDate "1957.??.??"]
[PlyCount "63"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.d5 Nh5 8.Qd2 f5 9.
O-O-O a6 10.Bd3 f4 11.Bf2 Bf6 12.Nge2 Be7 13.Kb1 c5 14.dxc6 bxc6 15.Bc2 
Nd7 16.Nd5 Bg5 17.h4 Bf6 18.Nxf6+ Rxf6 19.c5 dxc5 20.Bb3+ Kg7 21.Bxc5 Qe8 
22.Bd6 a5 23.Nc3 Ba6 24.Na4 Bb5 25.Bc7 c5 26.Nc3 Bc6 27.Nd5 Rf7 28.Bxa5 
Qc8 29.Nc7 Ra7 30.Ne6+ Kh8 31.Bc3 Re7 32.Nxf4 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Rossetto, Hector Decio"]
[Black "Humerez Estrada, Cidar"]
[Result "1/2-1/2"]
[ECO "D36"]
[EventDate "1957.??.??"]
[PlyCount "79"]

1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 Nbd7 5.cxd5 exd5 6.Bg5 Be7 7.Qc2 O-O 8.e3 
Re8 9.Bd3 c6 10.O-O Nf8 11.Rab1 Ng6 12.b4 Ne4 13.Bxe7 Qxe7 14.b5 Bg4 15.
Nd2 Nxd2 16.Qxd2 Qg5 17.f4 Qf6 18.bxc6 bxc6 19.Na4 Re7 20.Rb3 Rae8 21.Bb1 
Nh4 22.Rc1 Bf5 23.Nc5 h6 24.Bxf5 Nxf5 25.Rcc3 Qh4 26.Na6 Nxd4 27.Rb8 Nf5 
28.g3 Qf6 29.Rxe8+ Rxe8 30.Nb4 d4 31.Rxc6 dxe3 32.Qd7 Qa1+ 33.Kg2 Rf8 34.
Nc2 Qb1 35.Qxf5 e2 36.g4 Qf1+ 37.Kg3 e1=Q+ 38.Nxe1 Qxe1+ 39.Kg2 Qe2+ 40.
Kg3 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Rossetto, Hector Decio"]
[Black "Cantero, Ronaldo"]
[Result "1/2-1/2"]
[ECO "E87"]
[EventDate "1957.??.??"]
[PlyCount "64"]

1.c4 Nf6 2.Nc3 g6 3.d4 Bg7 4.e4 d6 5.f3 e5 6.d5 Nh5 7.Be3 Na6 8.Qd2 Qh4+ 
9.Bf2 Qf4 10.Be3 Qh4+ 11.Bf2 Qf4 12.Nge2 Qxd2+ 13.Kxd2 f5 14.Be3 O-O 15.
Rb1 c5 16.Nb5 Rd8 17.a3 f4 18.Bf2 g5 19.g4 Nf6 20.h4 h6 21.hxg5 hxg5 22.
Nc1 Bxg4 23.fxg4 Nxe4+ 24.Ke2 Nf6 25.Rg1 Rd7 26.b4 b6 27.bxc5 Nxc5 28.Bxc5
bxc5 29.Nc3 e4 30.Kd1 Kf7 31.N1e2 Re8 32.Kc2 Kg6 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Rossetto, Hector Decio"]
[Black "Engels, Ludwig"]
[Result "1-0"]
[ECO "E87"]
[EventDate "1957.??.??"]
[PlyCount "121"]

1.c4 Nf6 2.Nc3 g6 3.d4 Bg7 4.e4 d6 5.f3 O-O 6.Be3 e5 7.d5 Nh5 8.Qd2 f5 9.
O-O-O f4 10.Bf2 Rf7 11.Bd3 Bf8 12.Nge2 Nd7 13.Kb1 a6 14.Nc1 Qe8 15.Bc2 Ng7
16.Ba4 Qd8 17.Nd3 Rb8 18.Rc1 Nf6 19.c5 Ra8 20.Ne2 g5 21.Rhd1 g4 22.Qc3 Qe7
23.Qa3 Nfh5 24.Qc3 Qg5 25.cxd6 cxd6 26.Qa5 Be7 27.Bb6 Nf6 28.Qb4 Nge8 29.
Rc2 Bd7 30.Bxd7 Nxd7 31.Bf2 b6 32.Rc6 Bd8 33.Qa3 gxf3 34.gxf3 Qh5 35.Ng1 
Qxh2 36.Rdc1 Nc5 37.Bxc5 bxc5 38.Rxa6 Rxa6 39.Qxa6 c4 40.Qxc4 Kf8 41.Qc2 
Qg3 42.Qc8 Bb6 43.Qb8 Ba7 44.Qb4 Bxg1 45.Nxe5 Bc5 46.Rxc5 dxc5 47.Qxc5+ 
Re7 48.a4 Qe1+ 49.Ka2 Qe3 50.Qb4 Qa7 51.Nc6 Qb7 52.Qc5 Qd7 53.e5 h5 54.a5 
h4 55.a6 h3 56.a7 Nc7 57.Qxe7+ Qxe7 58.Nxe7 h2 59.d6 Na8 60.Nc6 h1=Q 61.d7
1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Rossetto, Hector Decio"]
[Black "Perez Alcocer, Jose"]
[Result "1-0"]
[ECO "E31"]
[EventDate "1957.??.??"]
[PlyCount "53"]

1.c4 Nf6 2.Nc3 e6 3.d4 Bb4 4.Bg5 c5 5.d5 exd5 6.cxd5 d6 7.e3 h6 8.Bh4 Nbd7
9.Bd3 O-O 10.Ne2 Ne5 11.Bc2 Ng6 12.Bg3 Re8 13.O-O Nh5 14.Qd3 a6 15.h3 Bxc3
16.bxc3 Nxg3 17.Nxg3 b5 18.f4 Qb6 19.Rae1 Bd7 20.Kh2 Re7 21.e4 Rae8 22.Nh5
Kh8 23.Qg3 Rg8 24.e5 Nf8 25.Qh4 Re8 26.Nf6 Qd8 27.Qh5 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Rossetto, Hector Decio"]
[Black "Sanguineti, Raul"]
[Result "1-0"]
[ECO "E24"]
[EventDate "1957.??.??"]
[PlyCount "53"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.a3 Bxc3+ 6.bxc3 Nc6 7.Nf3 d6 8.Bg5 
h6 9.Bh4 b6 10.e3 Na5 11.Be2 Bb7 12.O-O g5 13.Bg3 Ne4 14.d5 exd5 15.cxd5 
Bxd5 16.Rad1 Bb7 17.Bb5+ Kf8 18.Nd2 Nxg3 19.fxg3 Qe7 20.Qg6 Bd5 21.e4 Be6 
22.Rf6 Nb7 23.Rdf1 Nd8 24.Bc4 Ke8 25.Qg7 Qf8 26.Bb5+ Ke7 27.Rxe6+ 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Rossetto, Hector Decio"]
[Black "Ley, Manuel Madeira de"]
[Result "1-0"]
[ECO "B68"]
[EventDate "1957.??.??"]
[PlyCount "137"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.Qd2 Bd7 8.O-O-O 
Nc6 9.Be2 Be7 10.f4 Qc7 11.Rhe1 O-O-O 12.Nb3 Kb8 13.Kb1 Bc8 14.Bf3 h6 15.
Bxf6 Bxf6 16.Ne2 Qb6 17.c4 Rd7 18.g3 Rhd8 19.Rc1 Rc7 20.Red1 Ka8 21.Nc3 
Qb4 22.Bg2 Kb8 23.Ne2 Qa4 24.Nc3 Qb4 25.Qe1 Na5 26.Nxa5 Qxa5 27.Bf1 Rc6 
28.Ne2 Qxe1 29.Rxe1 Rb6 30.b3 a5 31.Nc3 Bd7 32.Kc2 Rc8 33.Rcd1 Be8 34.Rd2 
Kc7 35.Red1 g6 36.Bg2 h5 37.a4 Bxc3 38.Kxc3 Ra6 39.h4 Rb6 40.e5 d5 41.cxd5
Kb8+ 42.Kb2 Bxa4 43.Rd3 Bd7 44.d6 a4 45.Ra1 axb3 46.Rxb3 Rxb3+ 47.Kxb3 Rc5
48.Kb2 Rc4 49.Rc1 Rxc1 50.Kxc1 Ka7 51.Kc2 b5 52.Kc3 Kb6 53.Kb4 Be8 54.Bf3 
Bd7 55.g4 hxg4 56.Bxg4 Kc6 57.Be2 Kb6 58.Bf3 Be8 59.h5 gxh5 60.Bxh5 Kc6 
61.Ka5 Kc5 62.Bxf7 Bd7 63.Bg6 Bc6 64.Ka6 b4 65.Bc2 Kd4 66.Kb6 Be8 67.Kc7 
b3 68.Bxb3 Ke4 69.d7 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Rossetto, Hector Decio"]
[Black "Mangini, Jose Thiago"]
[Result "1-0"]
[ECO "D36"]
[EventDate "1957.??.??"]
[PlyCount "83"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Bg5 h6 5.Bh4 d5 6.e3 Nbd7 7.cxd5 exd5 8.Bd3 
c6 9.Qc2 Be7 10.Nf3 Nh5 11.Bxe7 Qxe7 12.O-O O-O 13.Rab1 Nhf6 14.b4 a6 15.
a4 Rd8 16.Rfc1 Ne8 17.b5 Nd6 18.bxc6 bxc6 19.a5 Bb7 20.Na4 Nb5 21.Rb3 Re8 
22.Qd2 Rad8 23.Bf5 Nb8 24.Ne5 Qg5 25.Bb1 Rd6 26.Qc2 g6 27.f4 Qf6 28.Nb6 
Bc8 29.Nxc8 Rxc8 30.Qf2 Qd8 31.Qe1 Nd7 32.Bd3 Nxe5 33.fxe5 Re6 34.Rb2 Qe8 
35.Qg3 Kh7 36.Rf2 Rc7 37.h4 f5 38.exf6 Rxe3 39.Bxg6+ Qxg6 40.Qxe3 Nd6 41.
Qe5 Rd7 42.Rxc6 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Rubio Aguado, Fernando"]
[Black "Letelier Martner, Rene"]
[Result "0-1"]
[ECO "E29"]
[EventDate "1957.??.??"]
[PlyCount "82"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.e3 Nc6 7.Bd3 O-O 8.Nf3 
d6 9.e4 e5 10.h3 Re8 11.d5 Ne7 12.g3 Ng6 13.Kf1 Rf8 14.Kg2 Kh8 15.Rf1 Ng8 
16.Qc2 N8e7 17.h4 Kg8 18.h5 Nh8 19.Nh4 f6 20.f4 Nf7 21.Be3 Qe8 22.Be2 exf4
23.gxf4 Nf5 24.Bf2 Nxh4+ 25.Bxh4 f5 26.Bf3 Nh6 27.Rae1 fxe4 28.Qxe4 Bf5 
29.Qxe8 Rfxe8 30.Re7 Bd3 31.Rfe1 Rxe7 32.Bxe7 Re8 33.Re6 Nf5 34.Bg5 Kf7 
35.Kf2 Bxc4 36.Rxe8 Kxe8 37.Be4 g6 38.hxg6 hxg6 39.Bf6 Kf7 40.Bg5 Ng7 41.
Ke3 Ne8 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Rubio Aguado, Fernando"]
[Black "Humerez Estrada, Cidar"]
[Result "0-1"]
[ECO "C00"]
[EventDate "1957.??.??"]
[PlyCount "58"]

1.Nf3 Nf6 2.g3 c5 3.Bg2 Nc6 4.O-O d5 5.d3 e6 6.Nbd2 Be7 7.e4 O-O 8.c3 b6 
9.e5 Nd7 10.Qe2 Bb7 11.Re1 Rc8 12.h4 Rc7 13.h5 Qa8 14.h6 g6 15.Bh3 Nd8 16.
Nf1 d4 17.N1h2 Nc6 18.Bf4 b5 19.Ng4 Nb4 20.Ng5 Nd5 21.Qd2 dxc3 22.bxc3 c4 
23.Ne4 cxd3 24.Bg5 Bxg5 25.Qxg5 Qd8 26.Qd2 Nc5 27.Bg2 Nxe4 28.Bxe4 f5 29.
Bxd5 Qxd5 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Rubio Aguado, Fernando"]
[Black "Engels, Ludwig"]
[Result "0-1"]
[ECO "A56"]
[EventDate "1957.??.??"]
[PlyCount "68"]

1.d4 c5 2.d5 e5 3.c4 d6 4.e4 Nf6 5.Nc3 Be7 6.Nf3 O-O 7.Be2 Nbd7 8.O-O Re8 
9.a3 b6 10.Re1 Nf8 11.Bf1 Ng6 12.g3 Bd7 13.h3 Rf8 14.Kh2 Ne8 15.Bd3 f5 16.
exf5 Bxf5 17.Bxf5 Rxf5 18.Qd3 Qd7 19.Ne4 Nc7 20.Re3 Raf8 21.Ng1 Bg5 22.Rf3
Bxc1 23.Rxc1 Ne8 24.Re1 Nf6 25.Ree3 Ne7 26.Ne2 Rh5 27.Nxf6+ Rxf6 28.Ng1 
Rfh6 29.g4 Qxg4 30.Rg3 Qd7 31.Re4 Rf5 32.Qe3 Rhf6 33.f3 Rf4 34.Ne2 Nf5 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Rubio Aguado, Fernando"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "E26"]
[EventDate "1957.??.??"]
[PlyCount "59"]

1.c4 Nf6 2.Nc3 e6 3.d4 Bb4 4.a3 Bxc3+ 5.bxc3 c5 6.e3 b6 7.Bd3 Nc6 8.Nf3 d6
9.e4 e5 10.h3 Qc7 11.Be3 Na5 12.O-O h6 13.Nd2 g5 14.a4 Be6 15.Qe2 Ng8 16.
Rfb1 Ne7 17.Nb3 Nxb3 18.Rxb3 Nc6 19.d5 Na5 20.Rbb1 Bd7 21.Qh5 Qd8 22.h4 
gxh4 23.f4 exf4 24.Bxf4 Qf6 25.Rf1 O-O-O 26.e5 Qg7 27.Rae1 Rhg8 28.Rf2 
dxe5 29.Bxe5 Qg5 30.Qxf7 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Rubio Aguado, Fernando"]
[Black "Silva, Luiz Tavares da"]
[Result "1-0"]
[ECO "E91"]
[EventDate "1957.??.??"]
[PlyCount "53"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Be2 O-O 6.Bg5 c6 7.Nf3 Bg4 8.O-O Nbd7
9.Qd2 Qc7 10.h3 Bxf3 11.Bxf3 e5 12.Be3 a6 13.Rfc1 Rfe8 14.b4 exd4 15.Bxd4 
c5 16.bxc5 dxc5 17.Be3 Rad8 18.Qc2 Nf8 19.Rab1 Ne6 20.Nd5 Nxd5 21.cxd5 Nd4
22.Qxc5 Nxf3+ 23.gxf3 Qd7 24.Kg2 Be5 25.Qb6 Rb8 26.Bd4 Bf4 27.Qf6 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Rubio Aguado, Fernando"]
[Black "Rossetto, Hector Decio"]
[Result "1-0"]
[ECO "A56"]
[EventDate "1957.??.??"]
[PlyCount "79"]

1.d4 Nf6 2.c4 c5 3.d5 e5 4.Nc3 d6 5.e4 a6 6.a4 Be7 7.Nge2 Nbd7 8.h4 g6 9.
Bd2 h5 10.Nc1 Rb8 11.Be2 Nb6 12.b3 Ng4 13.g3 Bd7 14.Nd3 Nc8 15.f3 Nh6 16.
Qc1 Bf8 17.f4 Ng4 18.Bxg4 Bxg4 19.fxe5 Bg7 20.Bf4 Qa5 21.O-O O-O 22.Ra2 
Bh3 23.Rff2 Ra8 24.Kh2 Bg4 25.Rf1 Qb6 26.Rb2 Re8 27.Rbf2 dxe5 28.Bh6 Nd6 
29.Qg5 Qd8 30.Bxg7 Kxg7 31.Nxc5 Rb8 32.Rf6 Bf5 33.Rxd6 Qxd6 34.exf5 Qxc5 
35.Ne4 Qf8 36.fxg6 fxg6 37.Rxf8 Rxf8 38.Qxe5+ Kh6 39.Qg5+ Kg7 40.Qe7+ 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Rubio Aguado, Fernando"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "E96"]
[EventDate "1957.??.??"]
[PlyCount "88"]

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 a5 10.Rb1 Re8 11.d5 Nc5 12.Bg5 h6 13.Bxf6 Qxf6 14.b3 Bg4 15.a3 Na6 
16.Be2 h5 17.Qd2 c5 18.Qg5 Qxg5 19.Nxg5 Bf6 20.Bxg4 Bxg5 21.Be2 Bd2 22.Nb5
Bxe1 23.Rxe1 Rad8 24.Bd3 Re7 25.Bc2 Nc7 26.Nc3 Rf8 27.Re2 Kg7 28.Bd3 f5 
29.Re1 Kf6 30.Re2 Rg7 31.Re1 Ke7 32.Re2 Ne8 33.a4 f4 34.Re1 g5 35.h3 Nf6 
36.Kf1 Nh7 37.Rd1 Rf6 38.Ke1 Nf8 39.Kd2 Ng6 40.Rh1 Nh4 41.Bf1 Rh6 42.Nd1 
g4 43.hxg4 hxg4 44.Rg1 g3 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Sanguineti, Raul"]
[Black "Letelier Martner, Rene"]
[Result "1-0"]
[ECO "B66"]
[EventDate "1957.??.??"]
[PlyCount "67"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Qd2 a6 8.O-O-O 
h6 9.Bf4 Bd7 10.Nxc6 Bxc6 11.f3 e5 12.Bg3 b5 13.Bh4 g5 14.Bf2 Qa5 15.Kb1 
Be7 16.h4 Rg8 17.hxg5 hxg5 18.Be3 Rb8 19.Nd5 Qxd2 20.Nxf6+ Bxf6 21.Bxd2 
Ke7 22.Bb4 Rbd8 23.a4 Ke6 24.axb5 axb5 25.c4 bxc4 26.Bxc4+ d5 27.exd5+ 
Bxd5 28.Rxd5 Rxd5 29.Rd1 Rd8 30.g4 Rd7 31.Bc5 Bd8 32.b4 Bc7 33.Kc2 Bd8 34.
Rd3 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Sanguineti, Raul"]
[Black "Ley, Manuel Madeira de"]
[Result "1/2-1/2"]
[ECO "C63"]
[EventDate "1957.??.??"]
[PlyCount "58"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 f5 4.Nc3 Nd4 5.Bc4 c6 6.O-O Nxf3+ 7.Qxf3 Qf6 8.Re1
f4 9.d4 d6 10.b3 h5 11.Ba3 Bg4 12.Qd3 O-O-O 13.Bxg8 Rxg8 14.f3 Bd7 15.Rad1
g5 16.dxe5 dxe5 17.Bxf8 Qxf8 18.Kh1 g4 19.Qe2 Qe7 20.fxg4 hxg4 21.g3 Rh8 
22.Rd3 fxg3 23.Rxg3 Qh4 24.Reg1 Rdf8 25.Nd1 Rf3 26.Qg2 Rhf8 27.Qd2 Rh8 28.
Qg2 Rhf8 29.Qd2 Rh8 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Sanguineti, Raul"]
[Black "Cruz, Walter Oswaldo"]
[Result "1-0"]
[ECO "C88"]
[EventDate "1957.??.??"]
[PlyCount "59"]

1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 O-O 8.a4 Rb8
9.axb5 axb5 10.c3 d6 11.d4 exd4 12.cxd4 Bg4 13.Nc3 Nb4 14.Bf4 Nh5 15.Be3 
c5 16.h3 Bd7 17.dxc5 dxc5 18.Ne5 Nf6 19.Nxd7 Nxd7 20.Ra7 Ne5 21.Qxd8 Bxd8 
22.Bxc5 Nbd3 23.Bxf8 Kxf8 24.Rea1 Bb6 25.Ra8 Bxf2+ 26.Kf1 Rxa8 27.Rxa8+ 
Ke7 28.Rb8 Bd4 29.Rxb5 Nxb2 30.Ne2 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Sanguineti, Raul"]
[Black "Esposito, Alfredo"]
[Result "1-0"]
[ECO "C18"]
[EventDate "1957.??.??"]
[PlyCount "129"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.Qg4 Nf5 8.Bd3 h5
9.Qh3 Nc6 10.Bxf5 exf5 11.Qg3 Kf8 12.Bg5 Qa5 13.dxc5 Qxc5 14.Ne2 Qc4 15.
Qf4 Qe4 16.Qxe4 fxe4 17.O-O-O Be6 18.c4 dxc4 19.Nd4 Re8 20.Rhe1 Bg4 21.f3 
exf3 22.gxf3 Nxd4 23.Rxd4 Be6 24.Rg1 b5 25.Kb2 Bf5 26.Rd5 a6 27.f4 Kg8 28.
Bf6 Bg4 29.Bxg7 Kxg7 30.h3 Kg6 31.hxg4 hxg4 32.Rxg4+ Kf5 33.Rg7 Kxf4 34.
Rxf7+ Ke4 35.Rd6 Rxe5 36.Rxa6 Rh2 37.Rd6 Rd5 38.Re6+ Kd4 39.Rc7 Rg2 40.Re1
Rh2 41.Rc8 Rhh5 42.Rd1+ Ke5 43.Rg1 Ke4 44.Rg4+ Ke3 45.Kc3 Rh2 46.Re8+ Kf3 
47.Rg7 Rf5 48.Rge7 Rf2 49.Re5 Rf7 50.Rxb5 Kg2 51.Rg5+ Kf1 52.Rge5 Ra7 53.
Re1+ Kg2 54.R1e2 Rxe2 55.Rxe2+ Kf3 56.Re6 Ra4 57.Kd4 Rxa3 58.Kxc4 Kf4 59.
Kb5 Kf5 60.Ra6 Rh3 61.c4 Ke5 62.c5 Rb3+ 63.Kc6 Rh3 64.Ra1 Rh6+ 65.Kb7 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Sanguineti, Raul"]
[Black "Rubio Aguado, Fernando"]
[Result "1-0"]
[ECO "B87"]
[EventDate "1957.??.??"]
[PlyCount "113"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 e6 7.O-O b5 8.Bb3 Bb7
9.Re1 Nc6 10.f4 Na5 11.Qd3 Nxb3 12.cxb3 d5 13.e5 Ne4 14.Be3 Bc5 15.Nc2 Qb6
16.Bxc5 Qxc5+ 17.Qd4 Rc8 18.Re3 Qxd4 19.Nxd4 Ke7 20.Nxe4 dxe4 21.Rc3 Rhd8 
22.Rxc8 Rxc8 23.Kf2 f5 24.Rd1 Bd5 25.Ke3 g6 26.g3 Rc5 27.Kd2 Kd7 28.Rc1 
e3+ 29.Kd1 Rxc1+ 30.Kxc1 Be4 31.Kd1 Bd3 32.b4 Bc4 33.a3 h6 34.h4 h5 35.Ke1
Bd3 36.b3 e2 37.Kd2 e1=Q+ 38.Kxe1 Be4 39.Kd2 Bg2 40.Kc3 Bf1 41.Nf3 Bg2 42.
Ng5 Bd5 43.Kd4 Kc6 44.Nh7 Bxb3 45.Nf8 Kb6 46.Nd7+ Kc6 47.Nc5 Bd5 48.Nxa6 
Kb6 49.Nc5 Kc6 50.a4 bxa4 51.Nxa4 Bb3 52.Nc5 Bd5 53.Kc3 Kb6 54.Nd7+ Kc7 
55.Nf8 Kd8 56.Kd4 Ke7 57.Nh7 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Sanguineti, Raul"]
[Black "Silva, Luiz Tavares da"]
[Result "1-0"]
[ECO "B40"]
[EventDate "1957.??.??"]
[PlyCount "59"]

1.e4 c5 2.Nf3 e6 3.d3 Nc6 4.Nbd2 g6 5.Nb3 Bg7 6.c3 d6 7.d4 cxd4 8.cxd4 Bd7
9.Bg5 Nge7 10.Be2 Na5 11.Nbd2 h6 12.Bf4 d5 13.Be5 Bxe5 14.Nxe5 Nec6 15.O-O
Nxe5 16.dxe5 Nc6 17.exd5 exd5 18.Nb3 Be6 19.Bb5 O-O 20.Bxc6 bxc6 21.Rc1 
Qb6 22.Qd4 Rab8 23.Rc5 Rfc8 24.Rd1 Qb4 25.h3 Qxd4 26.Rxd4 Bf5 27.Rd2 Bb1 
28.Nd4 Bxa2 29.Nxc6 Kf8 30.Nxb8 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Sanguineti, Raul"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "B02"]
[EventDate "1957.??.??"]
[PlyCount "103"]

1.e4 c5 2.Nf3 e6 3.c3 Nf6 4.e5 Nd5 5.d4 cxd4 6.cxd4 Nc6 7.Nc3 d6 8.Nxd5 
exd5 9.Bd3 Be7 10.h3 dxe5 11.dxe5 O-O 12.O-O Be6 13.Bf4 Rc8 14.Rc1 Qb6 15.
Qd2 Qb4 16.Qxb4 Nxb4 17.Bb1 Nc6 18.Bg5 Bb4 19.Rfd1 h6 20.Bd2 Bxd2 21.Nxd2 
Nxe5 22.f4 Rxc1 23.Rxc1 Nc4 24.Nxc4 dxc4 25.Be4 g6 26.Bxb7 Rb8 27.Ba6 Rxb2
28.Bxc4 Bxc4 29.Rxc4 Rxa2 30.Kh2 Kg7 31.Rc6 Ra3 32.Rd6 h5 33.g4 h4 34.Kg2 
Ra2+ 35.Kf3 Ra3+ 36.Kg2 Ra2+ 37.Kf3 Ra3+ 38.Kg2 a5 39.f5 gxf5 40.gxf5 a4 
41.Ra6 Rg3+ 42.Kh2 a3 43.Ra4 Kf6 44.Rxh4 Rb3 45.Ra4 Kxf5 46.h4 Rb2+ 47.Kg3
Ra2 48.Ra6 Ra1 49.h5 a2 50.Kg2 f6 51.Ra5+ Ke6 52.Ra7 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Sanguineti, Raul"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]
[ECO "B38"]
[EventDate "1957.??.??"]
[PlyCount "82"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 Nh6 7.Nc3 O-O 8.Be2 
f5 9.exf5 Bxd4 10.Bxd4 Nxf5 11.Bc5 d6 12.Ba3 Nfd4 13.O-O Bf5 14.Rc1 Rf7 
15.b3 Qd7 16.Nb5 Nxe2+ 17.Qxe2 a6 18.Nc3 b5 19.Nd5 Qb7 20.Bb2 bxc4 21.Qxc4
Rc8 22.f4 e5 23.Nf6+ Kh8 24.fxe5 Nxe5 25.Qd5 Rxc1 26.Rxc1 Qxd5 27.Nxd5 Kg8
28.Ba3 Be4 29.Nc3 Bb7 30.Bxd6 Ng4 31.Re1 Rd7 32.Bb4 Nf6 33.Na4 Ne4 34.Nb6 
Rc7 35.Nc4 Bd5 36.Ne3 Bb7 37.Rf1 Rf7 38.Rd1 Kg7 39.Ba3 Rc7 40.Bb2+ Kf7 41.
Nc4 Ke6 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Silva, Luiz Tavares da"]
[Black "Letelier Martner, Rene"]
[Result "1-0"]
[ECO "D73"]
[EventDate "1957.??.??"]
[PlyCount "79"]

1.d4 d5 2.g3 c5 3.Bg2 Nf6 4.Nf3 g6 5.c4 Bg7 6.O-O cxd4 7.Nxd4 O-O 8.cxd5 
Nxd5 9.Nb5 Be6 10.Bxd5 Bxd5 11.N1c3 Bxc3 12.Nxc3 Bc6 13.Bh6 Re8 14.Qxd8 
Rxd8 15.Rfd1 Nd7 16.f3 f6 17.Be3 Kf7 18.Kf2 a6 19.Rac1 Ne5 20.b3 h5 21.Bb6
Rxd1 22.Rxd1 Nd7 23.Be3 Ke6 24.Rc1 Rd8 25.Rc2 g5 26.Rd2 Rc8 27.Nd1 b5 28.
Nb2 Bd5 29.Nd3 a5 30.h4 Rg8 31.hxg5 fxg5 32.Bxg5 Rxg5 33.Nf4+ Kd6 34.e4 e6
35.exd5 exd5 36.Ne2 b4 37.Nd4 Nf6 38.Rc2 Rg8 39.Rc6+ Ke7 40.Nf5+ 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Silva, Luiz Tavares da"]
[Black "Humerez Estrada, Cidar"]
[Result "0-1"]
[ECO "B96"]
[EventDate "1957.??.??"]
[PlyCount "48"]

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qc7 8.Qf3 Nc6
9.Nxc6 bxc6 10.O-O-O d5 11.exd5 cxd5 12.Bxf6 gxf6 13.f5 Rb8 14.fxe6 fxe6 
15.Bxa6 Bh6+ 16.Kb1 O-O 17.Bxc8 Rfxc8 18.Rd3 Bg7 19.Qe2 f5 20.Nd1 Kh8 21.
Rf1 Qc6 22.g4 Qb5 23.Qxe6 Bxb2 24.Qxf5 Bc3+ 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Silva, Luiz Tavares da"]
[Black "Engels, Ludwig"]
[Result "1/2-1/2"]
[ECO "E17"]
[EventDate "1957.??.??"]
[PlyCount "125"]

1.Nf3 Nf6 2.g3 e6 3.Bg2 d5 4.O-O Nbd7 5.d4 Be7 6.c4 O-O 7.b3 b6 8.Nc3 Bb7 
9.Bb2 c5 10.e3 dxc4 11.bxc4 Ne4 12.Qe2 Nxc3 13.Bxc3 Bf6 14.e4 cxd4 15.Nxd4
Qb8 16.Rad1 Rd8 17.f4 Be7 18.Nb5 a6 19.Qg4 g6 20.Nd4 Nf6 21.Qe2 e5 22.Nb3 
Nd7 23.Bh3 Qc7 24.Bxd7 Rxd7 25.Rxd7 Qxd7 26.Rd1 Qc6 27.Bxe5 a5 28.Ba1 a4 
29.Nd4 Bc5 30.Kf1 Qxe4 31.Qxe4 Bxe4 32.Nb5 a3 33.Nc7 Rc8 34.Nd5 Bf5 35.g4 
Be6 36.h3 Kf8 37.Bf6 h5 38.f5 Bxd5 39.Rxd5 Be7 40.Bxe7+ Kxe7 41.fxg6 hxg4 
42.g7 Rg8 43.hxg4 Rxg7 44.g5 Rg6 45.Kf2 Rc6 46.Rd3 Rxc4 47.Rxa3 Rc5 48.Ra6
b5 49.Ra5 Kd6 50.Kf3 Kd5 51.Ra7 Rc1 52.Re7 Rf1+ 53.Kg4 b4 54.Rc7 Rf2 55.
Kg3 Rf1 56.Kg4 Kd4 57.Kh5 Rf2 58.Kh6 Kd3 59.Kg7 Rxa2 60.Kxf7 b3 61.Rb7 b2 
62.Rxb2 Rxb2 63.g6 1/2-1/2

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Silva, Luiz Tavares da"]
[Black "Mangini, Jose Thiago"]
[Result "1-0"]
[ECO "A30"]
[EventDate "1957.??.??"]
[PlyCount "83"]

1.d4 e6 2.g3 c5 3.Bg2 Nf6 4.Nf3 Nc6 5.O-O b6 6.c4 Bb7 7.Nc3 Nxd4 8.Nxd4 
Bxg2 9.Kxg2 cxd4 10.Qxd4 Bc5 11.Qd3 O-O 12.Bg5 Be7 13.Rad1 Qc7 14.b3 Rfd8 
15.e4 a6 16.Rfe1 d6 17.f3 h6 18.Bf4 b5 19.cxb5 axb5 20.Re2 b4 21.Na4 e5 
22.Be3 d5 23.Bb6 Qb7 24.Bxd8 dxe4 25.Qe3 exf3+ 26.Qxf3 e4 27.Qe3 Bxd8 28.
Nc5 Qb6 29.Nxe4 Qxe3 30.Rxe3 Rxa2+ 31.Kf3 Be7 32.Nxf6+ Bxf6 33.h4 Rb2 34.
h5 Bg5 35.Re8+ Kh7 36.Rd3 Rc2 37.Re4 Rd2 38.Rxd2 Bxd2 39.Re7 Kg8 40.Rb7 
Kf8 41.g4 Kg8 42.Rb8+ 1-0

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Silva, Luiz Tavares da"]
[Black "Rossetto, Hector Decio"]
[Result "0-1"]
[ECO "A13"]
[EventDate "1957.??.??"]
[PlyCount "100"]

1.Nf3 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Nbd7 5.b3 c6 6.O-O e5 7.d3 Bd6 8.Nc3 d4 9.
Ne4 Nxe4 10.dxe4 O-O 11.Ne1 a5 12.Nd3 Qe7 13.e3 Nc5 14.exd4 Nxd3 15.Qxd3 
exd4 16.Qxd4 Be5 17.Ba3 Qf6 18.Qc5 Bg4 19.Rab1 Be2 20.Rfe1 Bd4 21.Qf5 Qxf5
22.exf5 Rfe8 23.Bb2 Bc5 24.Rbc1 h5 25.h3 Rad8 26.Bc3 Bb4 27.Bf1 Bf3 28.
Bxb4 axb4 29.Bg2 Be2 30.Rc2 Bd3 31.Rxe8+ Rxe8 32.Rd2 Bxf5 33.Kf1 Bb1 34.f4
Ra8 35.Bf3 Bxa2 36.Bd1 h4 37.gxh4 Bb1 38.Rd7 Rb8 39.Bg4 Bc2 40.Bd1 Bf5 41.
Rd4 Bxh3+ 42.Kf2 b6 43.Kg3 Bf5 44.Bg4 Bc2 45.Bd1 c5 46.Rd6 Bb1 47.Kg4 Kf8 
48.Bf3 Ke7 49.Rd1 Bc2 50.Re1+ Kf6 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Silva, Luiz Tavares da"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "D77"]
[EventDate "1957.??.??"]
[PlyCount "126"]

1.d4 Nf6 2.Nf3 g6 3.g3 Bg7 4.Bg2 O-O 5.O-O d5 6.c4 dxc4 7.Na3 Nc6 8.Nxc4 
Be6 9.Nce5 Bd5 10.Bf4 Nxe5 11.Bxe5 Bh6 12.Ne1 c6 13.Bxd5 Nxd5 14.e4 Nb6 
15.Qb3 Qc8 16.Ng2 Rd8 17.Rad1 Nd7 18.Bf4 Bg7 19.Be3 b6 20.Nf4 Qb7 21.f3 e5
22.Ne2 Qa6 23.Nc3 exd4 24.Bxd4 Bxd4+ 25.Rxd4 Nc5 26.Qd1 Ne6 27.Qa4 Qxa4 
28.Rxd8+ Rxd8 29.Nxa4 Kf8 30.Nc3 Rd2 31.Rf2 Rd3 32.e5 Nc5 33.Kg2 Ke7 34.f4
a5 35.Rc2 Ke6 36.Kf2 g5 37.Ke2 gxf4 38.gxf4 Rh3 39.Kf1 Kf5 40.Ne2 Rd3 41.
Ke1 Ke4 42.Kf2 h5 43.b3 h4 44.Rc4+ Kd5 45.Nc1 Rd2+ 46.Ke3 Rd1 47.Ke2 Rh1 
48.Ke3 Rxh2 49.Rd4+ Ke6 50.Rd6+ Ke7 51.Rxc6 Rc2 52.Ne2 Rxa2 53.Nd4 Rb2 54.
Rxb6 a4 55.b4 Ne6 56.Rb7+ Ke8 57.Nf5 h3 58.Nd6+ Kf8 59.f5 h2 60.f6 Kg8 61.
Rb8+ Nf8 62.e6 fxe6 63.Rb5 h1=Q 0-1

[Event "South American zonal"]
[Site "Rio de Janeiro BRA"]
[Date "1957.??.??"]
[Round "?"]
[White "Silva, Luiz Tavares da"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "A24"]
[EventDate "1957.??.??"]
[PlyCount "72"]

1.Nf3 Nf6 2.g3 g6 3.Bg2 Bg7 4.c4 O-O 5.O-O d6 6.Nc3 e5 7.d3 h6 8.Rb1 Be6 
9.b4 Qc8 10.Re1 Bh3 11.Bh1 Nc6 12.Be3 Ne7 13.Qb3 Ng4 14.Bd2 f5 15.c5+ Kh7 
16.cxd6 cxd6 17.Rbc1 Qd7 18.Rc2 Nc6 19.Rec1 e4 20.Ne1 Nf6 21.e3 d5 22.Ne2 
Bg4 23.f3 exf3 24.Nxf3 a6 25.Ned4 Bxf3 26.Nxf3 Rfe8 27.a4 Qd6 28.b5 axb5 
29.axb5 Na5 30.Qb4 Qxb4 31.Bxb4 Rxe3 32.Ra2 Nb3 33.Rxa8 Nxc1 34.Rb8 Nxd3 
35.Bf8 Nd7 36.Rxb7 Nxf8 0-1

