[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.12"]
[Round "1"]
[White "Byrne, Robert"]
[Black "Perez Perez, Francisco Jose"]
[Result "1-0"]
[ECO "E63"]
[EventDate "1961.03.12"]
[PlyCount "101"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 7. O-O a6 8. h3 Rb8 9. e4 b5 10. cxb5 axb5 11. Re1 b4 12. Nd5 e6 13. Nxf6+ Bxf6 14. Bh6 Re8 15. e5 Bh8 16. Rc1 Bb7 17. Ng5 Qd7 18. Ne4 Ne7 19. Nf6+ Bxf6 20. exf6 Bxg2 21. fxe7 Ba8 22. Bf8 c5 23. dxc5 Qc6 24. f3 dxc5 25. Qe2 h5 26. Qe5 Rxf8 27. exf8=Q+ Rxf8 28. Re3 Rd8 29. Rxc5 Qa6 30. Rc1 Qxa2 31. Rd3 Bd5 32. g4 Qa7+ 33. Kg2 Qa6 34. Rd4 h4 35. g5 Qa8 36. Rf1 Qb8 37. Qxb8 Rxb8 38. Rxh4 b3 39. Rc1 Kg7 40. Ra4 e5 41. Ra5 Rd8 42. Kf2 Be6 43. Rxe5 Bxh3 44. Rc7 Kf8 45. Rb7 Be6 46. Ke3 Rd6 47. Ra5 Rd8 48. Rab5 Kg7 49. Rb8 Rd1 50. Re8 Bd7 51. Rd8 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.12"]
[Round "1"]
[White "Camara, Ronald"]
[Black "Reinhardt, Enrique"]
[Result "1/2-1/2"]
[ECO "E28"]
[EventDate "1961.03.12"]
[PlyCount "100"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 Nc6 6. a3 Bxc3+ 7. bxc3 d6 8. Ne2 e5 9. e4 Re8 10. Ng3 exd4 11. cxd4 Nxd4 12. O-O c6 13. Be3 Ne6 14. Bc2 Nc5 15. Qd4 Qe7 16. Rfe1 Ng4 17. Bf4 Ne5 18. Rad1 Bg4 19. Nf5 Bxf5 20. exf5 Rad8 21. Bg3 Qf8 22. f6 gxf6 23. Qh4 Qg7 24. Re3 Ne6 25. Rxd6 Rxd6 26. Bxe5 Ng5 27. Bxd6 Rxe3 28. Bxh7+ Qxh7 29. Qxh7+ Kxh7 30. fxe3 Ne4 31. c5 b5 32. cxb6 axb6 33. Be7 b5 34. Kf1 c5 35. Ke2 c4 36. Bb4 f5 37. Be7 Kg6 38. Bb4 Kf6 39. Bf8 Ke5 40. Bb4 Kd5 41. Be7 Ke6 42. Bb4 Ke5 43. Ba5 Nc5 44. Bc3+ Ke4 45. h4 Ne6 46. h5 f4 47. h6 Nf8 48. Bg7 Nh7 49. exf4 Kxf4 50. Kd2 f6 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.12"]
[Round "1"]
[White "Filip, Miroslav"]
[Black "Dominguez, Cristobal"]
[Result "1-0"]
[ECO "A26"]
[EventDate "1961.03.12"]
[PlyCount "79"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 d6 6. O-O Nc6 7. d3 e5 8. Rb1 Bf5 9. Nh4 Be6 10. b4 d5 11. b5 Ne7 12. cxd5 Nfxd5 13. Na4 b6 14. e4 Nf6 15. Bb2 Nd7 16. Nf3 c5 17. Nc3 Bg4 18. Qb3 Bxf3 19. Bxf3 Re8 20. Ne2 Nf8 21. Bg4 Qd6 22. f4 Ne6 23. f5 Nd8 24. fxg6 hxg6 25. Rf2 Bh6 26. Kg2 Rf8 27. Rbf1 Kg7 28. Rf6 Qc7 29. Ng1 Ng8 30. R6f2 Nb7 31. Rxf7+ Rxf7 32. Bxe5+ Qxe5 33. Qxf7+ Kh8 34. Qxb7 Rd8 35. Nf3 Qc3 36. Nh4 Bg7 37. Nxg6+ Kh7 38. Nf4 Nh6 39. Be6 c4 40. Qc7 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.12"]
[Round "1"]
[White "Matanovic, Aleksandar"]
[Black "Rossetto, Hector Decio"]
[Result "1-0"]
[ECO "B33"]
[EventDate "1961.03.12"]
[PlyCount "57"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Bxf6 gxf6 9. Na3 d5 10. Nxd5 Bxa3 11. bxa3 Rg8 12. Rb1 Rg4 13. f3 Rg6 14. Nb6 Be6 15. Nxa8 Qxa8 16. Qd2 f5 17. Bd3 f4 18. O-O Bh3 19. Rf2 Qa7 20. Kh1 Be6 21. Rff1 b5 22. a4 b4 23. Qf2 Qe7 24. Bxa6 Bxa2 25. Rb2 Nd4 26. Bb5+ Nxb5 27. axb5 Bc4 28. Rfb1 b3 29. b6 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.12"]
[Round "1"]
[White "Najdorf, Miguel"]
[Black "Goldenberg, Edgardo"]
[Result "1-0"]
[ECO "D40"]
[EventDate "1961.03.12"]
[PlyCount "83"]

1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. e3 d5 5. Nf3 Nc6 6. a3 Ne4 7. Bd3 Nxc3 8. bxc3 Be7 9. O-O O-O 10. Qc2 g6 11. Rd1 dxc4 12. Bxc4 Qc7 13. Ba2 Bd7 14. e4 Rac8 15. Qd2 Rfd8 16. Qh6 Bf8 17. Qh4 cxd4 18. cxd4 Bg7 19. Bf4 Qa5 20. d5 exd5 21. Ng5 h6 22. Nxf7 Kxf7 23. Rxd5 Be6 24. Rxa5 Bxa2 25. Rb5 Bxa1 26. Rxb7+ Kg8 27. h3 Bf7 28. Bxh6 Ne5 29. Kh2 Re8 30. Bg5 Rc6 31. Rb1 Bd4 32. Rd1 Bb2 33. Be3 Nc4 34. Bxa7 Bxa3 35. Bd4 Kf8 36. Bf6 Bg8 37. Qh6+ Kf7 38. Ba1 Bd6+ 39. f4 Bf8 40. Qg5 Ne3 41. Rd7+ Ke6 42. Ra7 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.12"]
[Round "1"]
[White "Pelikan, Jorge"]
[Black "Bielicki, Carlos"]
[Result "1/2-1/2"]
[ECO "B44"]
[EventDate "1961.03.12"]
[PlyCount "149"]

1. e4 c5 2. Nf3 Nc6 3. Bc4 e6 4. d4 cxd4 5. Nxd4 Qa5+ 6. c3 Nf6 7. O-O Nxe4 8. Bf4 Nxd4 9. Qxd4 d5 10. Bd3 Nf6 11. Be5 Be7 12. Nd2 Qb6 13. Qf4 Bd7 14. a4 Qd8 15. Rfe1 Bc6 16. Nb3 O-O 17. Nd4 Ne8 18. Qg3 Bd7 19. Qh3 g6 20. Bb5 Bf6 21. f4 Bg7 22. Bxg7 Nxg7 23. Bxd7 Qxd7 24. g4 h5 25. gxh5 Nxh5 26. Rf1 Qe7 27. Rae1 Qf6 28. f5 exf5 29. Nxf5 gxf5 30. Qxh5 Qg6+ 31. Qxg6+ fxg6 32. Rf4 Rae8 33. Rd1 Re4 34. Rf2 Rxa4 35. Rxd5 Rg4+ 36. Kf1 Rf7 37. Rd6 Kg7 38. Re2 Rf4+ 39. Kg2 Rg4+ 40. Kf3 Rh4 41. Rg2 Rh6 42. Rd5 Kh7 43. Re5 Rh3+ 44. Kf4 Kh6 45. Re8 Kh7 46. Ree2 Rh4+ 47. Kg5 Rh5+ 48. Kf4 Rg7 49. Re8 Rc7 50. Re6 Rc4+ 51. Ke3 Rh3+ 52. Kd2 Rg4 53. Rf2 Rgh4 54. Re7+ Kh6 55. Rxb7 Rxh2 56. Rxh2 Rxh2+ 57. Kd3 g5 58. c4 g4 59. Rxa7 Rxb2 60. Ra1 Kg5 61. c5 Rb3+ 62. Kd2 Rb2+ 63. Kd3 Rb8 64. c6 Kh4 65. c7 Rc8 66. Rc1 Kg3 67. Ke2 Kg2 68. Ke3 Kg3 69. Rg1+ Kh2 70. Rc1 Kg3 71. Rg1+ Kh2 72. Rc1 g3 73. Kf3 f4 74. Rc2+ Kh3 75. Rc6 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.12"]
[Round "1"]
[White "Silva Nazzari, Roberto"]
[Black "Quinones, Oscar Carillo"]
[Result "1/2-1/2"]
[ECO "B99"]
[EventDate "1961.03.12"]
[PlyCount "58"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. O-O-O Nbd7 10. g4 b5 11. Bxf6 Nxf6 12. g5 Nd7 13. a3 Bb7 14. h4 Rc8 15. Bd3 d5 16. exd5 Bxa3 17. Bxb5 axb5 18. Ndxb5 Bxb2+ 19. Kxb2 Qb6 20. Qe2 O-O 21. dxe6 Bxh1 22. exd7 Rxc3 23. Kxc3 Bc6 24. Qe7 Rd8 25. Na3 Bxd7 26. Nc4 Qc7 27. Qd6 Rc8 28. Qxc7 Rxc7 29. Rd4 Kf8 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.12"]
[Round "1"]
[White "Wexler, Bernardo"]
[Black "Letelier Martner, Rene"]
[Result "1/2-1/2"]
[ECO "E73"]
[EventDate "1961.03.12"]
[PlyCount "81"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 e5 6. d5 c6 7. Bg5 h6 8. Bh4 cxd5 9. cxd5 a6 10. Nf3 O-O 11. Nd2 b5 12. f3 Nbd7 13. b4 Nb6 14. Nb3 Bd7 15. Na5 Qc7 16. Rc1 Rfc8 17. O-O Nh5 18. Re1 Qb8 19. Qb3 Ra7 20. Rc2 Rac7 21. Rec1 Bf6 22. Bxf6 Nxf6 23. Nd1 Rxc2 24. Rxc2 Rxc2 25. Qxc2 Kg7 26. Nf2 Na4 27. Bd1 Ne8 28. g3 Qb6 29. Qd2 f5 30. Bxa4 bxa4 31. Qc3 fxe4 32. Nc4 Qb5 33. fxe4 Qb8 34. a3 Bb5 35. Nb2 Qc7 36. Qxc7+ Nxc7 37. Nfd1 Na8 38. Nc3 Nb6 39. Kf2 Kf6 40. Ke3 Kg5 41. Kf3 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.13"]
[Round "2"]
[White "Bielicki, Carlos"]
[Black "Wexler, Bernardo"]
[Result "1-0"]
[ECO "D90"]
[EventDate "1961.03.12"]
[PlyCount "117"]

1. c4 Nf6 2. Nc3 c6 3. d4 d5 4. Nf3 g6 5. Bg5 Ne4 6. Bf4 Bg7 7. e3 Qa5 8. Qb3 O-O 9. cxd5 Nxc3 10. Qxc3 Qxc3+ 11. bxc3 cxd5 12. c4 Nc6 13. cxd5 Nb4 14. Kd2 Nxd5 15. Be5 f6 16. Bg3 Be6 17. Bc4 Rac8 18. Bb3 Bf7 19. Rhc1 Rfd8 20. Rxc8 Rxc8 21. Rc1 Rd8 22. Ke2 Bh6 23. Ne1 b5 24. Nd3 b4 25. Bxd5 Bxd5 26. Nxb4 Bxg2 27. Rc7 Rb8 28. Nd3 Rb7 29. Rxb7 Bxb7 30. Kd2 Kf7 31. Kc3 Bf8 32. Bb8 a6 33. Ba7 Bg2 34. Bc5 g5 35. Nb4 Bf1 36. Nc6 Ke8 37. d5 Bg2 38. Kd4 e5+ 39. Kc4 Bf1+ 40. Kb4 Bg2 41. Bxf8 Bxd5 42. Kc5 Bxa2 43. Bd6 Bb1 44. Be7 Kf7 45. Kd6 Be4 46. Bd8 h6 47. Ne7 Ke8 48. Ba5 Kf7 49. Nd5 Bf3 50. Bd8 Kg6 51. Nxf6 Kf5 52. Nd7 e4 53. Ne5 Be2 54. Nf7 Kg6 55. Ke7 Bd1 56. Nd6 Bc2 57. Ke6 Kh5 58. Nf5 a5 59. Bxa5 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.13"]
[Round "2"]
[White "Dominguez, Cristobal"]
[Black "Goldenberg, Edgardo"]
[Result "1/2-1/2"]
[ECO "B88"]
[EventDate "1961.03.12"]
[PlyCount "81"]

1. e4 c5 2. Ne2 Nf6 3. Nbc3 d6 4. d4 cxd4 5. Nxd4 e6 6. Bc4 Be7 7. Bb3 O-O 8. Be3 Nc6 9. f4 Na5 10. Qf3 Bd7 11. g4 Nxb3 12. axb3 Bc6 13. g5 Nd7 14. h4 d5 15. e5 a5 16. Qg3 Bb4 17. g6 hxg6 18. h5 g5 19. fxg5 Qc7 20. Bf4 a4 21. g6 Nc5 22. h6 fxg6 23. hxg7 Qxg7 24. Bh6 Ne4 25. Qg2 Qf7 26. Bxf8 Rxf8 27. O-O-O a3 28. Na2 axb2+ 29. Kxb2 Bc5 30. Qh3 Qg7 31. Qxe6+ Qf7 32. Qh3 Qg7 33. Qe6+ Qf7 34. Qh3 Qg7 35. Nc3 Bd7 36. e6 Bxd4 37. Rxd4 Nf2 38. Qg2 Nxh1 39. exd7 Qxd4 40. Qxg6+ Qg7 41. Qe6+ 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.13"]
[Round "2"]
[White "Filip, Miroslav"]
[Black "Camara, Ronald"]
[Result "1-0"]
[ECO "E89"]
[EventDate "1961.03.12"]
[PlyCount "59"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Nge2 e5 7. Be3 c6 8. Qd2 a6 9. d5 cxd5 10. cxd5 Nbd7 11. O-O-O Qa5 12. Kb1 Nc5 13. Nc1 Bd7 14. Nd3 Na4 15. Nxa4 Qxd2 16. Rxd2 Bxa4 17. b3 Bb5 18. Nb2 Rfc8 19. Nc4 Bxc4 20. Bxc4 b5 21. Bd3 Nd7 22. b4 Bf6 23. Rc1 Rxc1+ 24. Kxc1 Rc8+ 25. Kb2 Bd8 26. a4 bxa4 27. Bxa6 a3+ 28. Kb3 Rc1 29. Ra2 Re1 30. Bf2 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.13"]
[Round "2"]
[White "Letelier Martner, Rene"]
[Black "Silva Nazzari, Roberto"]
[Result "1/2-1/2"]
[ECO "E70"]
[EventDate "1961.03.12"]
[PlyCount "113"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bd3 O-O 6. Nge2 e5 7. d5 Nh5 8. O-O Na6 9. a3 Nc5 10. Bc2 a5 11. Rb1 f5 12. exf5 Bxf5 13. b4 axb4 14. axb4 Nd7 15. Ne4 Bxe4 16. Bxe4 Nf4 17. Nc3 Nf6 18. f3 Nxe4 19. Nxe4 h6 20. Qc2 Rf7 21. Rd1 Rd7 22. Bb2 c6 23. dxc6 bxc6 24. c5 dxc5 25. Nxc5 Rxd1+ 26. Rxd1 Qg5 27. Ne4 Qe7 28. Qxc6 Rd8 29. Rxd8+ Qxd8 30. Qd6 Qxd6 31. Nxd6 Nd3 32. Bc3 Bf8 33. Nc4 Nxb4 34. Nxe5 Bg7 35. Bd4 g5 36. Kf1 Nc2 37. Bb2 Ne3+ 38. Kg1 Nd5 39. Nd3 Bxb2 40. Nxb2 Kf7 41. Kf2 Kf6 42. Nc4 Ne7 43. Ke3 Ng6 44. Ke4 h5 45. Ne3 Ke6 46. Nd5 Nh4 47. f4 Nxg2 48. fxg5 Nh4 49. Ne3 Ng6 50. Ng2 Ne7 51. Nf4+ Kf7 52. h4 Kf8 53. Ke5 Kf7 54. Ng2 Ng6+ 55. Kd6 Ne7 56. Ne3 Ng6 57. Nf5 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.13"]
[Round "2"]
[White "Perez Perez, Francisco Jose"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "A00"]
[EventDate "1961.03.12"]
[PlyCount "59"]

1. b4 f5 2. Bb2 Nf6 3. c4 e6 4. a3 Be7 5. Nf3 O-O 6. g3 d5 7. Bg2 a5 8. b5 Nbd7 9. Qc2 Nc5 10. O-O c6 11. bxc6 bxc6 12. d4 Nce4 13. Ne5 Qe8 14. f3 Nd6 15. Nd2 Nf7 16. Nd3 Nd6 17. Rae1 Ba6 18. c5 Nc4 19. Nxc4 Bxc4 20. Ne5 Ba6 21. Rf2 f4 22. gxf4 Nh5 23. e3 Bh4 24. Bc3 a4 25. Rb1 Bxf2+ 26. Qxf2 Nf6 27. Qg3 Bb5 28. Bf1 Bxf1 29. Rb7 Nh5 30. Qg5 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.13"]
[Round "2"]
[White "Quinones, Oscar Carillo"]
[Black "Matanovic, Aleksandar"]
[Result "0-1"]
[ECO "B86"]
[EventDate "1961.03.12"]
[PlyCount "94"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. a3 Be7 8. Ba2 b5 9. f4 Qc7 10. Qf3 O-O 11. Be3 Bb7 12. f5 e5 13. Nde2 Nbd7 14. O-O Nb6 15. g4 d5 16. exd5 e4 17. Qg3 Qxg3+ 18. Nxg3 Nbxd5 19. Nxd5 Nxd5 20. Bxd5 Bxd5 21. Rad1 Bc6 22. Nh5 Rfd8 23. Bb6 Rxd1 24. Rxd1 f6 25. Nf4 Kf7 26. Kf2 g6 27. Nd5 Bf8 28. Nc7 Rb8 29. Be3 a5 30. Ne6 Be7 31. Bf4 Rc8 32. Bc7 Be8 33. c3 b4 34. axb4 axb4 35. Ke3 bxc3 36. bxc3 Ba4 37. Rd4 Bc6 38. Ba5 h5 39. h3 hxg4 40. hxg4 Rh8 41. Rd2 Rh3+ 42. Kd4 gxf5 43. gxf5 Rf3 44. Bc7 Rxf5 45. Nf4 Bc5+ 46. Kc4 Be3 47. Rd5 Rxf4 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.13"]
[Round "2"]
[White "Reinhardt, Enrique"]
[Black "Pelikan, Jorge"]
[Result "1-0"]
[ECO "B09"]
[EventDate "1961.03.12"]
[PlyCount "115"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 c6 5. Nf3 Bg7 6. Be2 O-O 7. O-O b5 8. a3 a6 9. Kh1 Nbd7 10. e5 Nd5 11. Ne4 N7b6 12. Qe1 f6 13. Qg3 Nc4 14. Re1 Nce3 15. Bd3 Nf5 16. Qf2 Qb6 17. exd6 exd6 18. c4 bxc4 19. Bxc4 Kh8 20. Bd2 Ra7 21. b4 Nc7 22. Nc3 Nb5 23. Na4 Qb7 24. h3 d5 25. Bd3 Qf7 26. Nc5 Re8 27. a4 Nbd6 28. g4 Nh6 29. Rxe8+ Qxe8 30. Re1 Re7 31. Rxe7 Qxe7 32. Qe1 Qxe1+ 33. Bxe1 Nc4 34. Nd2 f5 35. g5 Nf7 36. Nxc4 dxc4 37. Bxc4 Nd6 38. Bxa6 Bxd4 39. Bxc8 Nxc8 40. Ne6 Be3 41. Kg2 Kg8 42. Kf3 Bg1 43. Bc3 Na7 44. Bd4 Bxd4 45. Nxd4 Kf7 46. h4 h6 47. Ke3 hxg5 48. fxg5 Ke8 49. Kf4 Kf8 50. Ke5 Ke7 51. Ne2 Nc8 52. Nf4 Nb6 53. Nxg6+ Kf7 54. Kxf5 Nxa4 55. Ne5+ Kg7 56. Nxc6 Nc3 57. Nd4 Nd5 58. b5 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.13"]
[Round "2"]
[White "Rossetto, Hector Decio"]
[Black "Byrne, Robert"]
[Result "0-1"]
[ECO "A00"]
[EventDate "1961.03.12"]
[PlyCount "76"]

1. d3 g6 2. g3 Bg7 3. Bg2 c5 4. f4 Nc6 5. c3 e6 6. Nf3 Nge7 7. e4 b6 8. Na3 d6 9. O-O O-O 10. Nc2 a5 11. a4 Rb8 12. Ne3 d5 13. Qc2 d4 14. Nc4 dxc3 15. bxc3 Nb4 16. cxb4 Bxa1 17. Bd2 Bg7 18. bxc5 Ba6 19. Be3 bxc5 20. Bxc5 Rc8 21. Qf2 Bxc4 22. dxc4 Qc7 23. Ba3 Rfd8 24. Rc1 Rd3 25. Bb2 Bxb2 26. Qxb2 Qc5+ 27. Qf2 Ra3 28. Qxc5 Rxc5 29. Ne5 Rxa4 30. Bf1 Rc7 31. Rd1 Ra2 32. Nd7 Kg7 33. e5 Ng8 34. g4 h6 35. Nb6 a4 36. Rd8 a3 37. Ra8 Ne7 38. Ra5 Nc6 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.15"]
[Round "3"]
[White "Byrne, Robert"]
[Black "Quinones, Oscar Carillo"]
[Result "1-0"]
[ECO "E69"]
[EventDate "1961.03.12"]
[PlyCount "59"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nbd7 7. O-O e5 8. e4 c6 9. Rb1 a5 10. h3 exd4 11. Nxd4 Re8 12. Be3 Nc5 13. Qc2 Qe7 14. Rfe1 Bd7 15. Nb3 Nxb3 16. axb3 h5 17. Rbd1 Red8 18. Bg5 Be8 19. Qd2 Qf8 20. Qf4 Nh7 21. Bxd8 Rxd8 22. c5 Bh6 23. Qf3 Ng5 24. Qd3 d5 25. exd5 Qxc5 26. h4 Nh7 27. Qc4 Qb6 28. dxc6 Rxd1 29. Nxd1 Bxc6 30. Re7 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.15"]
[Round "3"]
[White "Camara, Ronald"]
[Black "Dominguez, Cristobal"]
[Result "1/2-1/2"]
[ECO "A75"]
[EventDate "1961.03.12"]
[PlyCount "25"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bg5 O-O 6. Be2 c5 7. d5 e6 8. Nf3 exd5 9. cxd5 Bg4 10. Nd2 Bxe2 11. Qxe2 Nbd7 12. O-O a6 13. a4 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.15"]
[Round "3"]
[White "Goldenberg, Edgardo"]
[Black "Perez Perez, Francisco Jose"]
[Result "1/2-1/2"]
[ECO "E91"]
[EventDate "1961.03.12"]
[PlyCount "83"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Nf3 Nc6 7. d5 Nb4 8. O-O a5 9. Rb1 e5 10. Ne1 Nh5 11. a3 Na6 12. Bxh5 gxh5 13. Qxh5 f5 14. Bg5 Qd7 15. Nf3 Nc5 16. Bh6 a4 17. Ng5 Rf6 18. Bxg7 Qxg7 19. f4 Bd7 20. Ne6 Nxe6 21. dxe6 Bxe6 22. fxe5 Rh6 23. Qe2 Qxe5 24. g3 fxe4 25. Qe3 Qh5 26. Rf2 Bxc4 27. Nxe4 Rf8 28. Rxf8+ Kxf8 29. Qf2+ Qf7 30. Qe3 Qh5 31. Qf2+ Qf7 32. Qe3 Re6 33. Qd4 Re5 34. Rc1 b5 35. Nd2 Qd5 36. Qf4+ Rf5 37. Qh6+ Kg8 38. Nxc4 bxc4 39. Qh4 Qc5+ 40. Kh1 Qd5+ 41. Kg1 Qc5+ 42. Kh1 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.15"]
[Round "3"]
[White "Matanovic, Aleksandar"]
[Black "Letelier Martner, Rene"]
[Result "1/2-1/2"]
[ECO "C14"]
[EventDate "1961.03.12"]
[PlyCount "53"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4 a6 8. Nf3 c5 9. dxc5 Nc6 10. Bd3 Nxc5 11. O-O f5 12. exf6 Qxf6 13. Qd2 O-O 14. g3 Bd7 15. Rae1 Rac8 16. Qf2 Nxd3 17. cxd3 Be8 18. Qd2 Bg6 19. Rf2 Rc7 20. a3 Bf5 21. Ne5 Nxe5 22. Rxe5 Qg6 23. Qe3 Rfc8 24. Rd2 h6 25. Qd4 Kh7 26. Re1 b5 27. Qe3 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.15"]
[Round "3"]
[White "Najdorf, Miguel"]
[Black "Rossetto, Hector Decio"]
[Result "1-0"]
[ECO "D26"]
[EventDate "1961.03.12"]
[PlyCount "83"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. Qe2 a6 7. dxc5 Bxc5 8. e4 b5 9. Bd3 Nc6 10. Nbd2 e5 11. O-O O-O 12. Nb3 Bb6 13. Be3 Bg4 14. Rfd1 Bxe3 15. Qxe3 Qe7 16. Rdc1 Rac8 17. Nfd2 Nb4 18. a3 Nxd3 19. Qxd3 Rfd8 20. Rxc8 Bxc8 21. Qe3 Qd6 22. Nf1 Be6 23. Nc5 Ng4 24. Qc3 Bc4 25. b4 Bxf1 26. Rxf1 Qd4 27. Qc2 Nf6 28. h3 h6 29. Re1 Rd6 30. Kh2 Kh7 31. Re3 Qa1 32. Rd3 Rxd3 33. Qxd3 Qe1 34. Qe3 Qb1 35. f3 Nh5 36. Qd2 Qf1 37. Nd7 f6 38. Nf8+ Kg8 39. Ne6 Kh7 40. h4 Qc4 41. Qd7 Qa2 42. Qf7 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.15"]
[Round "3"]
[White "Pelikan, Jorge"]
[Black "Filip, Miroslav"]
[Result "0-1"]
[ECO "B20"]
[EventDate "1961.03.12"]
[PlyCount "100"]

1. d3 g6 2. g3 Bg7 3. Bg2 c5 4. Na3 Nc6 5. f4 e6 6. Nf3 Nge7 7. O-O O-O 8. c3 d6 9. e4 Rb8 10. Nc2 b5 11. a3 a5 12. g4 f5 13. Ng5 h6 14. Nh3 b4 15. axb4 axb4 16. c4 fxg4 17. Qxg4 d5 18. Qg3 dxc4 19. dxc4 Bb7 20. f5 exf5 21. exf5 Rxf5 22. Bxh6 Nd4 23. Nxd4 Bxd4+ 24. Kh1 Bxg2+ 25. Qxg2 Qb6 26. Bg5 Rbf8 27. Rfe1 Nc8 28. Bh6 Bg7 29. Bxg7 Kxg7 30. Rad1 Qf6 31. Rd7+ Rf7 32. Rxf7+ Kxf7 33. Rg1 Ne7 34. Ng5+ Kg7 35. Ne4 Qd4 36. Ng3 Re5 37. b3 Qd3 38. Qb7 Qxb3 39. Nf5+ Rxf5 40. Qxe7+ Rf7 41. Qxc5 Qf3+ 42. Rg2 Qe4 43. Qg1 b3 44. Qa1+ Kh7 45. Kg1 Qxc4 46. h4 Qc5+ 47. Kh1 Rf4 48. Qe1 Qb4 49. Qg3 Rxh4+ 50. Kg1 Qd4+ 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.15"]
[Round "3"]
[White "Silva Nazzari, Roberto"]
[Black "Bielicki, Carlos"]
[Result "0-1"]
[ECO "E70"]
[EventDate "1961.03.12"]
[PlyCount "42"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Bg5 d6 6. Bd3 e5 7. d5 h6 8. Bh4 Nbd7 9. g4 Nc5 10. g5 Nh5 11. Nf3 Nxd3+ 12. Qxd3 Nf4 13. Qc2 Bg4 14. gxh6 Bf6 15. Bxf6 Qxf6 16. Ng1 Ng2+ 17. Kd2 Qg5+ 18. Kd3 Nf4+ 19. Kd2 f5 20. h4 Qxh6 21. Ke1 fxe4 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.15"]
[Round "3"]
[White "Wexler, Bernardo"]
[Black "Reinhardt, Enrique"]
[Result "0-1"]
[ECO "A26"]
[EventDate "1961.03.12"]
[PlyCount "123"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 d6 6. Nc3 e5 7. d3 Nc6 8. Rb1 Nh5 9. b4 f5 10. b5 Ne7 11. Bd2 h6 12. e3 Nf6 13. Ne1 Kh7 14. f4 exf4 15. gxf4 d5 16. Nf3 Be6 17. Nd4 Bf7 18. c5 Re8 19. Qc2 b6 20. Nce2 Nd7 21. Nb3 a6 22. a4 axb5 23. axb5 bxc5 24. Nxc5 Nxc5 25. Qxc5 Ra2 26. Rfd1 Nc8 27. Rbc1 d4 28. Nxd4 Bxd4 29. Qxd4 Qxd4 30. exd4 Bb3 31. Re1 Rxe1+ 32. Bxe1 Rc2 33. Ra1 Nb6 34. Ra7 Bd5 35. Bf1 Nc8 36. Ra1 g5 37. fxg5 hxg5 38. Bb4 Rb2 39. Ba5 Nd6 40. Bxc7 Nxb5 41. Be5 f4 42. Ra6 f3 43. Bh3 g4 44. Bxg4 Rg2+ 45. Kf1 Rxg4 46. Ra5 Nc3 47. Bg3 Rg5 48. Ke1 Rf5 49. Kd2 Ne2 50. Bf2 Nf4 51. Ke3 Ng2+ 52. Kd2 Kg6 53. Kc3 Nf4 54. Kd2 Nh3 55. Ke3 Ng5 56. h4 Nh7 57. Ra6+ Nf6 58. Kd2 Kh5 59. Rd6 Kg4 60. Rb6 Kh3 61. Rb2 Ng4 62. Ke1 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "4"]
[White "Bielicki, Carlos"]
[Black "Matanovic, Aleksandar"]
[Result "0-1"]
[ECO "A16"]
[EventDate "1961.03.12"]
[PlyCount "72"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. e3 d6 6. Nge2 c6 7. d3 e5 8. Rb1 Be6 9. b3 Qd7 10. h3 d5 11. Ba3 Re8 12. cxd5 Nxd5 13. Nxd5 cxd5 14. h4 Nc6 15. O-O Bh3 16. Bb2 Bxg2 17. Kxg2 Qf5 18. a3 Rad8 19. b4 e4 20. Bxg7 Kxg7 21. d4 Ne7 22. Rc1 Rc8 23. Qd2 h6 24. Rxc8 Nxc8 25. Nc3 Nb6 26. Qe2 a6 27. b5 a5 28. Na2 Nc4 29. a4 Nb6 30. Nc1 Nxa4 31. Qa2 Nb6 32. Qxa5 Nc4 33. Qa2 g5 34. Qe2 gxh4 35. gxh4 Kh7 36. Kh2 Qf6 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "4"]
[White "Camara, Ronald"]
[Black "Pelikan, Jorge"]
[Result "1-0"]
[ECO "E91"]
[EventDate "1961.03.12"]
[PlyCount "151"]

1. d4 d6 2. c4 g6 3. e4 Bg7 4. Nc3 Na6 5. Nf3 c5 6. Be2 Nf6 7. d5 Nc7 8. O-O O-O 9. h3 e6 10. Bg5 exd5 11. cxd5 h6 12. Bh4 b5 13. Nd2 b4 14. Nb5 Nxb5 15. Bxb5 Bd7 16. Bc4 Qe8 17. Qe2 Nh5 18. f4 Bxb2 19. Rae1 Bd4+ 20. Kh1 Bf6 21. Qf2 Qe7 22. Bxf6 Qxf6 23. g4 Ng7 24. e5 Qe7 25. Ne4 f5 26. Nxd6 Kh7 27. gxf5 Nxf5 28. Ne4 Ng7 29. e6 Ba4 30. d6 Qb7 31. Kh2 Bc6 32. Nxc5 Qb6 33. Nd3 Nf5 34. Qxb6 axb6 35. d7 Ne7 36. Ne5 Bb7 37. Nf7 Kg7 38. d8=Q Raxd8 39. Nxd8 Rxd8 40. Rd1 Rxd1 41. Rxd1 Be4 42. Rd8 b5 43. Bb3 Bc6 44. h4 h5 45. Kh3 Be4 46. Rd4 Bc6 47. Rd8 Be4 48. Re8 Nf5 49. Rg8+ Kf6 50. e7 Kxe7 51. Rxg6 Nd4 52. Rg5 Bf5+ 53. Kg3 Bg4 54. Rd5 Ne2+ 55. Kh2 Nc3 56. Rd4 Bf5 57. Rxb4 Kd6 58. Bf7 Kc5 59. a3 Nb1 60. Rb3 Nd2 61. Rc3+ Kd4 62. Rc6 Ke3 63. Bxh5 Kxf4 64. Be2 Ke3 65. Bxb5 Kf2 66. Rf6 Nf3+ 67. Kh1 Bh3 68. Rxf3+ Kxf3 69. h5 Kf4 70. a4 Bg4 71. Be8 Kg5 72. Kg2 Be2 73. Kf2 Bc4 74. Ke3 Ba6 75. Kd4 Be2 76. Kc5 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "4"]
[White "Dominguez, Cristobal"]
[Black "Perez Perez, Francisco Jose"]
[Result "1-0"]
[ECO "C15"]
[EventDate "1961.03.12"]
[PlyCount "63"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Nge2 dxe4 5. a3 Bxc3+ 6. Nxc3 Nc6 7. Bb5 Nge7 8. Bg5 f6 9. Be3 O-O 10. Qd2 f5 11. O-O-O a6 12. Be2 b5 13. f3 b4 14. axb4 Nxb4 15. fxe4 c6 16. Bc4 Qa5 17. Bg5 Rb8 18. Kb1 Rf7 19. Bf4 Rb7 20. Bd6 Qd8 21. Bc5 a5 22. exf5 exf5 23. Bxf7+ Kxf7 24. d5 Nbxd5 25. Nxd5 cxd5 26. Bxe7 Qxe7 27. Qxd5+ Be6 28. Qxa5 Ra7 29. Qc3 Ba2+ 30. Kc1 Rc7 31. Rhe1 Qg5+ 32. Qe3 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "4"]
[White "Filip, Miroslav"]
[Black "Wexler, Bernardo"]
[Result "1-0"]
[ECO "E91"]
[EventDate "1961.03.12"]
[PlyCount "75"]

1. c4 Nf6 2. Nf3 g6 3. Nc3 Bg7 4. e4 c5 5. d4 O-O 6. Be2 d6 7. O-O Bg4 8. d5 Na6 9. Be3 Nc7 10. h3 Bxf3 11. Bxf3 Rb8 12. a4 a6 13. a5 e5 14. b4 cxb4 15. Na4 Nd7 16. Qb3 f5 17. Qxb4 Rf7 18. Rab1 f4 19. Ba7 Ra8 20. Qxb7 Nxd5 21. cxd5 Nf8 22. Qxf7+ Kxf7 23. Rb7+ Kg8 24. Nb6 Rc8 25. Nxc8 Qxc8 26. Rfb1 h5 27. Be2 Qc2 28. Bxa6 Qxe4 29. Bf1 Qxd5 30. a6 e4 31. Rc7 Qd2 32. Bb6 e3 33. fxe3 fxe3 34. a7 Be5 35. a8=Q Qf2+ 36. Kh1 Qf6 37. g3 Qf5 38. Qa2+ 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "4"]
[White "Letelier Martner, Rene"]
[Black "Byrne, Robert"]
[Result "1/2-1/2"]
[ECO "D97"]
[EventDate "1961.03.12"]
[PlyCount "53"]

1. c4 Nf6 2. Nc3 g6 3. d4 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. Bf4 c6 8. e4 b5 9. Qd3 Qa5 10. Nd2 Nh5 11. Be3 f5 12. Nb3 Qd8 13. Be2 e5 14. Rd1 fxe4 15. Nxe4 Be6 16. Bxh5 gxh5 17. Ng5 Bf5 18. Qc3 exd4 19. Nxd4 Qd5 20. O-O Qxa2 21. Qc5 Nd7 22. Qd6 Ne5 23. Nge6 Bxe6 24. Nxe6 Rf6 25. Qxe5 Rxe6 26. Qxh5 Rg6 27. b4 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "4"]
[White "Quinones, Oscar Carillo"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "B82"]
[EventDate "1961.03.12"]
[PlyCount "74"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. a3 Nf6 7. f4 d6 8. Be3 b5 9. Qf3 Bb7 10. Bd3 Nbd7 11. O-O Nc5 12. Rae1 Be7 13. Bf2 d5 14. exd5 Nxd5 15. Nxd5 Bxd5 16. Qh5 Nxd3 17. cxd3 O-O 18. Re3 Qxf4 19. Rh3 Qh6 20. Qxh6 gxh6 21. Be3 f5 22. Bxh6 Rf6 23. Ne2 Bc5+ 24. Kh1 Bf8 25. Bd2 e5 26. Rg3+ Bg7 27. Bc3 Re8 28. Rg5 Bf7 29. Rgxf5 Rxf5 30. Rxf5 Bg6 31. Rg5 Kf7 32. Ng3 Rd8 33. h4 Bf6 34. Rg4 h5 35. Rb4 Be7 36. Rb3 Rxd3 37. Ne2 Re3 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "4"]
[White "Reinhardt, Enrique"]
[Black "Silva Nazzari, Roberto"]
[Result "1-0"]
[ECO "E77"]
[EventDate "1961.03.12"]
[PlyCount "75"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 c5 6. d5 O-O 7. Nf3 e6 8. Be2 exd5 9. exd5 Re8 10. O-O Bf5 11. h3 Ne4 12. Nxe4 Bxe4 13. Ng5 Qe7 14. Nxe4 Qxe4 15. Bd3 Qd4+ 16. Kh1 Nd7 17. Rb1 Re7 18. Rf3 b5 19. b3 bxc4 20. bxc4 Rae8 21. Bd2 Nf6 22. Kh2 Ne4 23. Be3 Qf6 24. Qg1 Nc3 25. Rbf1 Bh6 26. Kh1 Ne4 27. g4 Qc3 28. Rd1 Bg7 29. f5 h6 30. h4 gxf5 31. g5 Kh8 32. gxh6 Bf6 33. h7 Bxh4 34. Bh6 Bf6 35. Bxe4 Rxe4 36. Rxc3 Bxc3 37. Qg3 Rg4 38. Qxc3+ 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "4"]
[White "Rossetto, Hector Decio"]
[Black "Goldenberg, Edgardo"]
[Result "1-0"]
[ECO "B25"]
[EventDate "1961.03.12"]
[PlyCount "63"]

1. e4 c5 2. Nf3 d6 3. g3 Nf6 4. Nc3 Nc6 5. Bg2 g6 6. O-O Bg7 7. h3 O-O 8. d3 Nd4 9. Be3 Ne8 10. Kh2 Rb8 11. Rb1 b5 12. Ne2 Nxe2 13. Qxe2 b4 14. Qd2 Ba6 15. Rfe1 Nc7 16. d4 cxd4 17. Nxd4 Qd7 18. Nb3 Ne6 19. f4 Qc7 20. Qf2 Rbc8 21. Rec1 Bb7 22. Bxa7 Ra8 23. Bb6 Qc4 24. Na5 Rxa5 25. Bxa5 Nc5 26. Qd2 Bxe4 27. Qxb4 Qe2 28. Qd2 Qh5 29. b4 Bxg2 30. Qxg2 Ne6 31. c4 Nd4 32. Bb6 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "5"]
[White "Byrne, Robert"]
[Black "Bielicki, Carlos"]
[Result "1/2-1/2"]
[ECO "E62"]
[EventDate "1961.03.12"]
[PlyCount "66"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 7. O-O e5 8. d5 Ne7 9. a4 a5 10. c5 e4 11. Ng5 dxc5 12. Ngxe4 Nxe4 13. Nxe4 Nxd5 14. Bg5 f6 15. Qxd5+ Qxd5 16. Nxf6+ Bxf6 17. Bxd5+ Kg7 18. Bxf6+ Rxf6 19. Rfd1 Rb6 20. b3 Bf5 21. Bc4 c6 22. f3 Re8 23. e4 Be6 24. Bxe6 Rxe6 25. Rd3 c4 26. bxc4 Rb4 27. c5 Re5 28. Rc3 g5 29. g4 Re7 30. Raa3 Kf6 31. Kf2 Rb2+ 32. Kg3 Ke5 33. Rd3 Rc2 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "5"]
[White "Goldenberg, Edgardo"]
[Black "Quinones, Oscar Carillo"]
[Result "1-0"]
[ECO "E63"]
[EventDate "1961.03.12"]
[PlyCount "65"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 7. O-O a6 8. h3 Rb8 9. e4 e5 10. Be3 b5 11. dxe5 dxe5 12. cxb5 axb5 13. Rc1 Bd7 14. Qc2 Qc8 15. Kh2 Qa6 16. Rfd1 Rfd8 17. Bg5 Nb4 18. Qb1 Qe6 19. a3 Na6 20. Bf1 c6 21. a4 Nb4 22. Be3 Bf8 23. a5 c5 24. Nd5 Nfxd5 25. exd5 Nxd5 26. Bxc5 Bxc5 27. Rxc5 Bc6 28. Qc1 Nb4 29. Rxd8+ Rxd8 30. Nxe5 Bd5 31. Qc3 Qf5 32. Ng4 Qb1 33. Rc7 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "5"]
[White "Matanovic, Aleksandar"]
[Black "Reinhardt, Enrique"]
[Result "1-0"]
[ECO "B94"]
[EventDate "1961.03.12"]
[PlyCount "85"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. Bc4 Qa5 8. Qd2 b5 9. Bd5 Nxd5 10. Nxd5 Qxd2+ 11. Bxd2 Ra7 12. Nc6 Rb7 13. Na5 Rb8 14. Nc7+ Kd8 15. Nd5 Ke8 16. O-O-O e6 17. Nb4 Ne5 18. b3 f6 19. f4 Nf7 20. Rhe1 Nd8 21. f5 Kf7 22. Bf4 exf5 23. exf5 Bxf5 24. Bxd6 Rb6 25. Bxf8 Rxf8 26. Nd5 Re6 27. Rxe6 Nxe6 28. Ne3 Be4 29. Rd7+ Ke8 30. Ra7 f5 31. Rxa6 Kd7 32. g3 Nc7 33. Rb6 g5 34. Rh6 f4 35. gxf4 gxf4 36. Ng4 Ne8 37. Nc6 f3 38. Nce5+ Kc7 39. Nf2 Nd6 40. Rh4 Bg6 41. Rh3 Ne4 42. Nxg6 Nxf2 43. Rxh7+ 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "5"]
[White "Najdorf, Miguel"]
[Black "Letelier Martner, Rene"]
[Result "1-0"]
[ECO "D55"]
[EventDate "1961.03.12"]
[PlyCount "125"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Ne8 7. Bxe7 Qxe7 8. Qc2 Nf6 9. cxd5 exd5 10. Bd3 c6 11. O-O Re8 12. e4 dxe4 13. Nxe4 Nxe4 14. Bxe4 g6 15. Rfe1 Qd8 16. d5 f5 17. dxc6 fxe4 18. c7 Qd5 19. Rad1 Qc6 20. cxb8=Q Rxb8 21. Nd4 Qxc2 22. Nxc2 Kf7 23. Rd4 Bf5 24. Ne3 Rbd8 25. Red1 Rxd4 26. Rxd4 Re5 27. g4 Be6 28. a3 Kf6 29. Rb4 b5 30. Kg2 h6 31. Rd4 Ke7 32. Kg3 g5 33. Kg2 a5 34. Kf1 a4 35. Ke2 Kf6 36. Kd2 h5 37. gxh5 g4 38. h6 Rh5 39. Rxe4 Rxh6 40. Nxg4+ Bxg4 41. Rxg4 Rxh2 42. Ke3 Rh3+ 43. f3 Rh2 44. Rb4 Rh5 45. Rd4 Ke5 46. Rg4 Kd5 47. Rg2 Rh1 48. Rg5+ Kc4 49. Rg4+ Kc5 50. Rb4 Re1+ 51. Kf4 Rc1 52. Kg5 Rc4 53. Rxc4+ Kxc4 54. f4 Kb3 55. f5 Kxb2 56. f6 Kxa3 57. f7 Kb3 58. f8=Q a3 59. Qf3+ Kb2 60. Qe2+ Ka1 61. Qf1+ Ka2 62. Qxb5 Ka1 63. Qc5 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "5"]
[White "Pelikan, Jorge"]
[Black "Dominguez, Cristobal"]
[Result "1-0"]
[ECO "E71"]
[EventDate "1961.03.12"]
[PlyCount "80"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Be3 d6 6. h3 e5 7. d5 c5 8. g4 b5 9. cxb5 a6 10. Qd2 Qa5 11. bxa6 Nxa6 12. Nge2 Nb4 13. f3 Ne8 14. Ng3 f5 15. gxf5 gxf5 16. exf5 Bxf5 17. Nxf5 Rxf5 18. a3 Rxf3 19. O-O-O e4 20. Rg1 Kh8 21. Rxg7 Nxg7 22. Be2 Nd3+ 23. Bxd3 exd3 24. Rg1 Nf5 25. Bg5 Rf8 26. Qe1 Nd4 27. Bh6 Ne2+ 28. Kd2 Nxg1 29. Bxf8 Rxf8 30. Qxg1 Qd8 31. Kxd3 Qh4 32. Qe3 Qf2 33. Qxf2 Rxf2 34. Ne4 Rxb2 35. Nxd6 Rb3+ 36. Kc4 Rxa3 37. Nb5 Rxh3 38. d6 Rg3 39. d7 Rg8 40. Nd6 Rg4+ 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "5"]
[White "Perez Perez, Francisco Jose"]
[Black "Rossetto, Hector Decio"]
[Result "0-1"]
[ECO "B00"]
[EventDate "1961.03.12"]
[PlyCount "70"]

1. e4 Nc6 2. d4 e5 3. dxe5 Nxe5 4. Bf4 Ng6 5. Bg3 Nf6 6. e5 Ne4 7. Qe2 Nxg3 8. hxg3 Qg5 9. Nc3 Qxe5 10. O-O-O Qxe2 11. Bxe2 Bb4 12. Nd5 Ba5 13. Bd3 c6 14. Bxg6 fxg6 15. Nf4 O-O 16. Nf3 Bc7 17. Rde1 d5 18. Ng5 Bxf4+ 19. gxf4 h6 20. Nf3 Rxf4 21. Re8+ Rf8 22. Re7 Rb8 23. Rhe1 Bf5 24. Nd4 Rf7 25. a4 Kf8 26. R7e5 Bd7 27. f3 g5 28. a5 b6 29. a6 c5 30. Ne6+ Kg8 31. Nc7 d4 32. Nd5 Bb5 33. Re7 Bc6 34. Nc7 Rc8 35. Rxf7 Kxf7 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "5"]
[White "Silva Nazzari, Roberto"]
[Black "Filip, Miroslav"]
[Result "0-1"]
[ECO "D91"]
[EventDate "1961.03.12"]
[PlyCount "48"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5 Ne4 6. cxd5 Nxc3 7. bxc3 Qxd5 8. e3 c5 9. Bb5+ Bd7 10. c4 Qe4 11. Qb1 Qxb1+ 12. Rxb1 Nc6 13. d5 Na5 14. Bxd7+ Kxd7 15. e4 b6 16. Rc1 e5 17. Bd2 Nb7 18. Bc3 f6 19. Nd2 Nd6 20. O-O Bh6 21. f3 a6 22. g3 Be3+ 23. Kg2 b5 24. f4 b4 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.16"]
[Round "5"]
[White "Wexler, Bernardo"]
[Black "Camara, Ronald"]
[Result "1-0"]
[ECO "B02"]
[EventDate "1961.03.12"]
[PlyCount "41"]

1. f4 Nf6 2. d3 d6 3. e4 e5 4. Nf3 Nc6 5. g3 Bg4 6. h3 Bxf3 7. Qxf3 d5 8. c3 Qd7 9. Be3 O-O-O 10. Nd2 dxe4 11. dxe4 Bc5 12. f5 Bxe3 13. Qxe3 Qxd2+ 14. Qxd2 Rxd2 15. Kxd2 Nxe4+ 16. Kc2 Nxg3 17. Rg1 Nxf5 18. Bd3 Nce7 19. h4 c6 20. h5 Kc7 21. Kb3 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.17"]
[Round "6"]
[White "Bielicki, Carlos"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "A36"]
[EventDate "1961.03.12"]
[PlyCount "72"]

1. c4 g6 2. Nc3 Bg7 3. g3 Nf6 4. Bg2 O-O 5. e4 c5 6. Nge2 Nc6 7. O-O d6 8. d3 Rb8 9. Rb1 a6 10. a3 b5 11. cxb5 axb5 12. b4 Ba6 13. h3 Nd7 14. Be3 Nd4 15. Qd2 Re8 16. Rfc1 e6 17. Kh1 Qe7 18. Bf4 Rb6 19. Nxd4 Bxd4 20. Be3 Bxe3 21. Qxe3 Rc8 22. Kh2 Rbb8 23. f4 Nb6 24. bxc5 Rxc5 25. Na2 Rbc8 26. Nb4 Bb7 27. Rxc5 dxc5 28. Nc2 Qd7 29. h4 Ba6 30. Bf1 Na4 31. Ra1 Rd8 32. Rb1 Bb7 33. Kg1 Bc6 34. Rb3 f5 35. exf5 exf5 36. Rb1 Re8 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.17"]
[Round "6"]
[White "Camara, Ronald"]
[Black "Silva Nazzari, Roberto"]
[Result "1/2-1/2"]
[ECO "C99"]
[EventDate "1961.03.12"]
[PlyCount "60"]

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 Rd8 13. Nf1 cxd4 14. cxd4 Nc6 15. Ne3 g6 16. a3 exd4 17. Nxd4 Nxd4 18. Qxd4 Bb7 19. b4 Bf8 20. Bb2 Bg7 21. Qd2 d5 22. exd5 Nxd5 23. Bxg7 Nxe3 24. Qxe3 Kxg7 25. Rac1 Re8 26. Qd4+ Kg8 27. Bb3 Rxe1+ 28. Rxe1 Qc6 29. f3 Re8 30. Rxe8+ Qxe8 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.17"]
[Round "6"]
[White "Dominguez, Cristobal"]
[Black "Rossetto, Hector Decio"]
[Result "0-1"]
[ECO "B21"]
[EventDate "1961.03.12"]
[PlyCount "120"]

1. e4 g6 2. d4 c5 3. dxc5 Qa5+ 4. Bd2 Qxc5 5. Bc3 Nf6 6. Nd2 d6 7. Nb3 Qc7 8. f4 Bg7 9. Bd3 Nc6 10. Nf3 O-O 11. Qe2 Nh5 12. Qd2 Bh6 13. g3 e5 14. Qg2 Bg7 15. fxe5 dxe5 16. O-O-O a6 17. Bc4 Bg4 18. Bd5 Rac8 19. Rd3 b5 20. h3 Bxf3 21. Rxf3 b4 22. Bxc6 bxc3 23. Rxc3 Qb6 24. Bd5 Rxc3 25. bxc3 Qe3+ 26. Qd2 Qxg3 27. c4 Qf3 28. Qd1 Bh6+ 29. Kb1 Qe3 30. Qe1 Rb8 31. Qa5 Qf3 32. Re1 Bf8 33. Qc7 Re8 34. c5 Re7 35. Qa5 Nf4 36. Qxa6 Nxd5 37. exd5 Qxd5 38. Qd3 Qc6 39. Qe4 Qxe4 40. Rxe4 f5 41. Rc4 Kf7 42. a4 Ke6 43. a5 Kd5 44. Rb4 e4 45. c4+ Ke5 46. Kc2 f4 47. a6 f3 48. Rb8 Bh6 49. Rb7 Re6 50. a7 Ra6 51. Nd2 Bxd2 52. Kxd2 Ra2+ 53. Kc3 f2 54. Rf7 e3 55. Kd3 Rxa7 56. Rf3 Ra3+ 57. Kc2 Ke4 58. Rf7 Ra2+ 59. Kc1 Ra1+ 60. Kb2 Rb1+ 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.17"]
[Round "6"]
[White "Filip, Miroslav"]
[Black "Matanovic, Aleksandar"]
[Result "1/2-1/2"]
[ECO "E59"]
[EventDate "1961.03.12"]
[PlyCount "83"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O Nc6 8. a3 Bxc3 9. bxc3 dxc4 10. Bxc4 Qc7 11. Be2 Rd8 12. Qc2 e5 13. Bb2 e4 14. Nd2 Bf5 15. Rfd1 Na5 16. c4 b6 17. d5 Qe7 18. a4 Nb7 19. Qc3 Ne8 20. Qe5 Qxe5 21. Bxe5 f6 22. Bc3 Nc7 23. f4 Nd6 24. Rdb1 Rab8 25. Rb2 Rb7 26. a5 Bd7 27. axb6 axb6 28. Rba2 Rdb8 29. Nb3 Kf7 30. g4 Nce8 31. f5 Rc8 32. Be1 b5 33. Na5 Rb6 34. cxb5 Bxb5 35. Bxb5 Rxb5 36. Nc6 Rb7 37. Bg3 Nc4 38. Kf2 Rb3 39. Bf4 Rd3 40. Rc2 Nb6 41. Ra7+ Kf8 42. Rxc5 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.17"]
[Round "6"]
[White "Letelier Martner, Rene"]
[Black "Goldenberg, Edgardo"]
[Result "1/2-1/2"]
[ECO "B44"]
[EventDate "1961.03.12"]
[PlyCount "86"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nb5 d6 6. Bf4 e5 7. Be3 a6 8. N5c3 Nf6 9. Be2 Be7 10. O-O O-O 11. Bf3 Be6 12. Re1 Rc8 13. a4 Qc7 14. h3 Rfd8 15. Re2 Qa5 16. Rd2 b5 17. Nd5 Bxd5 18. exd5 Nb8 19. c3 Nbd7 20. b4 Qc7 21. axb5 axb5 22. Ra7 Qb8 23. Rda2 Re8 24. Be2 Bd8 25. R2a6 e4 26. Na3 Rxc3 27. Ra8 Qb7 28. Nxb5 Rxe3 29. fxe3 Bb6 30. Nxd6 Bxe3+ 31. Kh1 Qxa8 32. Rxa8 Rxa8 33. Nc4 Bf4 34. Na5 Nb6 35. Qb3 Rc8 36. Nc6 Nfxd5 37. b5 Ra8 38. g3 Ra1+ 39. Kg2 Be3 40. Bc4 Nxc4 41. Qxc4 Rg1+ 42. Kh2 Rd1 43. Qxe4 Rd2+ 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.17"]
[Round "6"]
[White "Pelikan, Jorge"]
[Black "Wexler, Bernardo"]
[Result "0-1"]
[ECO "E20"]
[EventDate "1961.03.12"]
[PlyCount "98"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3 c5 5. a3 Bxc3+ 6. bxc3 Nc6 7. Bg2 Qa5 8. Bd2 Qa6 9. e3 Qxc4 10. Ne2 e5 11. O-O O-O 12. dxc5 Qxc5 13. e4 Qc4 14. f3 d6 15. Bg5 Nd7 16. g4 Nb6 17. Be3 Rd8 18. Qe1 d5 19. Bxb6 axb6 20. exd5 Rxd5 21. Ng3 Rda5 22. f4 Bxg4 23. f5 e4 24. Rf4 Qc5+ 25. Kh1 Bf3 26. Nxe4 Bxg2+ 27. Kxg2 Qe5 28. Qg3 f6 29. Rd1 Ra4 30. Re1 Qd5 31. Rg4 Qf7 32. Qd6 Kh8 33. Rg3 Re8 34. Rge3 Ne5 35. Ng3 Rc8 36. Qe6 Qf8 37. Rxe5 fxe5 38. Rxe5 Rxc3 39. Qd7 Ra8 40. f6 gxf6 41. Re7 Rc2+ 42. Kg1 Qg8 43. Rf7 Rf8 44. Re7 Qg6 45. Re4 Qh6 46. Ne2 Rg8+ 47. Kf1 Qxh2 48. Re8 Qh1+ 49. Kf2 Qg1+ 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.17"]
[Round "6"]
[White "Quinones, Oscar Carillo"]
[Black "Perez Perez, Francisco Jose"]
[Result "0-1"]
[ECO "C16"]
[EventDate "1961.03.12"]
[PlyCount "102"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Ne7 5. a3 Ba5 6. Qg4 Nf5 7. Bd3 h5 8. Qf4 Nc6 9. Nf3 Nce7 10. b4 Bb6 11. Ne2 h4 12. a4 a6 13. Qg4 Kf8 14. Bg5 Qe8 15. c3 Bd7 16. Bc2 Ng6 17. Nf4 Nxf4 18. Qxf4 Rc8 19. O-O a5 20. Rfe1 h3 21. g4 Ne7 22. Re3 axb4 23. cxb4 Nc6 24. Rb1 Kg8 25. Ra3 Qf8 26. Rab3 Ra8 27. R3b2 Rc8 28. Bd3 Ba7 29. Bf1 Ne7 30. Ra2 Ng6 31. Qg3 Qe8 32. Rba1 b6 33. a5 Bb5 34. axb6 Bxb6 35. Bxh3 Bc4 36. Ra3 Be2 37. Be3 Qf8 38. Bf1 Bxf3 39. Qxf3 Qxb4 40. Ra8 Qf8 41. Rxc8 Qxc8 42. Bb5 Qd8 43. Bc6 Qh4 44. Qg2 Kh7 45. h3 Rf8 46. Ra8 Rxa8 47. Bxa8 Qe7 48. Qf1 Qa3 49. Bb7 Nh4 50. Qb1+ g6 51. Qd1 Bxd4 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.17"]
[Round "6"]
[White "Reinhardt, Enrique"]
[Black "Byrne, Robert"]
[Result "0-1"]
[ECO "E70"]
[EventDate "1961.03.12"]
[PlyCount "66"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bg5 O-O 6. Bd3 Nc6 7. d5 Ne5 8. Be2 c6 9. f4 Ned7 10. Nh3 Qb6 11. Qd2 cxd5 12. cxd5 Nc5 13. Nf2 h6 14. Bh4 e5 15. fxe5 dxe5 16. O-O-O Bd7 17. Kb1 Rfc8 18. g4 a5 19. Qe3 a4 20. Rd2 Qa7 21. Qf3 Nb3 22. Rd3 Nd4 23. Qe3 b5 24. Bg3 Ne8 25. g5 h5 26. Bd1 Nd6 27. Qe1 b4 28. Ne2 Qc5 29. Qd2 Nc4 30. Qe1 Bb5 31. Ka1 Na5 32. Kb1 Nxe2 33. Bxe2 Qc2+ 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.18"]
[Round "7"]
[White "Byrne, Robert"]
[Black "Filip, Miroslav"]
[Result "1-0"]
[ECO "E60"]
[EventDate "1961.03.12"]
[PlyCount "83"]

1. d4 Nf6 2. c4 g6 3. g3 c6 4. d5 cxd5 5. cxd5 d6 6. Bg2 Bg7 7. Nf3 O-O 8. Nc3 Bd7 9. O-O Qc8 10. Be3 Bh3 11. Rc1 Bxg2 12. Kxg2 Na6 13. Bd4 Qd7 14. e4 Rfc8 15. Re1 Ne8 16. Rc2 Bxd4 17. Nxd4 Rc4 18. Rce2 Nf6 19. Nf3 Rc5 20. h3 Nc7 21. Nd4 Nce8 22. f4 Rac8 23. Nb3 R5c7 24. e5 dxe5 25. fxe5 Nh5 26. Rf2 f5 27. g4 Nhg7 28. Nd4 Rxc3 29. bxc3 Rxc3 30. gxf5 Qxd5+ 31. Kh2 Rc4 32. Rd2 Qa5 33. fxg6 hxg6 34. Nb3 Qb6 35. Rg2 Kh7 36. Qd3 Rh4 37. Reg1 Rh6 38. Nd4 Nh5 39. Qe4 Neg7 40. Nf3 Nf5 41. Ng5+ Kg7 42. Qd5 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.18"]
[Round "7"]
[White "Goldenberg, Edgardo"]
[Black "Bielicki, Carlos"]
[Result "0-1"]
[ECO "A71"]
[EventDate "1961.03.12"]
[PlyCount "58"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. Bg5 Bg7 8. e4 h6 9. Bh4 g5 10. Bg3 Nh5 11. Bb5+ Kf8 12. Be2 Nxg3 13. hxg3 Nd7 14. Qd2 a6 15. a4 Bf6 16. Nd1 Qe7 17. Qc2 Ne5 18. Ne3 Bd7 19. a5 Ng4 20. Nxg4 Bxg4 21. Nd2 Bd7 22. Ra3 Re8 23. Bd3 Kg7 24. O-O h5 25. Be2 g4 26. Rd1 Bd4 27. Nc4 h4 28. Qd3 Qf6 29. Rf1 hxg3 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.18"]
[Round "7"]
[White "Matanovic, Aleksandar"]
[Black "Camara, Ronald"]
[Result "1/2-1/2"]
[ECO "B35"]
[EventDate "1961.03.12"]
[PlyCount "124"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 O-O 8. Bb3 Ng4 9. Qxg4 Nxd4 10. Qh4 Qa5 11. O-O Bf6 12. Qg4 d6 13. Qd1 Nc6 14. Bd2 Qc5 15. Rb1 Bg7 16. Be3 Qa5 17. Nd5 Be6 18. f4 Bxd5 19. exd5 Nb8 20. c3 Nd7 21. a3 Rac8 22. Kh1 a6 23. Qe2 Qc7 24. Rbd1 b5 25. Bd4 Nf6 26. a4 Qb7 27. axb5 axb5 28. Ra1 Ra8 29. Rad1 Rac8 30. f5 Rce8 31. fxg6 hxg6 32. Rf4 Nd7 33. Bxg7 Kxg7 34. Rb4 Ne5 35. Rxb5 Qd7 36. Rb4 Ra8 37. Qe4 Rh8 38. Ba4 Qc8 39. Bc6 Ra7 40. Qd4 Ra2 41. Rf1 Rh5 42. Kg1 Rf5 43. Re1 Rg5 44. Qe3 Rh5 45. Bb5 Qa8 46. Be2 Rh8 47. Qd4 g5 48. Qe3 f6 49. Rd1 Ra5 50. Rbd4 Qa7 51. Re4 Qb7 52. Rb4 Qa8 53. Bf3 Ra1 54. Rbd4 Qa7 55. Qf2 Rh4 56. Rxa1 Qxa1+ 57. Rd1 Qa4 58. g3 Rh8 59. Re1 Qb3 60. Be4 Rb8 61. Qf5 Qb6+ 62. Kh1 Rh8 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.18"]
[Round "7"]
[White "Najdorf, Miguel"]
[Black "Reinhardt, Enrique"]
[Result "0-1"]
[ECO "A75"]
[EventDate "1961.03.12"]
[PlyCount "82"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Be2 O-O 9. O-O a6 10. a4 Bg4 11. h3 Bxf3 12. Bxf3 Qc7 13. Bf4 Re8 14. Rc1 Nbd7 15. Qc2 Re7 16. b3 h6 17. Qd2 Kh7 18. b4 Ne5 19. bxc5 Qxc5 20. Nd1 Qb6 21. Bxe5 Rxe5 22. Ne3 Nxe4 23. Qc2 Ng5 24. Bg4 Re7 25. Nc4 Qc5 26. Qb1 Bd4 27. Kh2 Qxd5 28. f4 Ne4 29. Rfd1 Qc5 30. Qd3 Bf2 31. Nxd6 Qxd6 32. Qxe4 Qf6 33. Qf3 Be3 34. Rc4 h5 35. Bc8 b5 36. Qxa8 bxc4 37. Qxa6 Bxf4+ 38. Kh1 Qd4 39. Rf1 c3 40. Bf5 gxf5 41. Qc8 Qe5 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.18"]
[Round "7"]
[White "Perez Perez, Francisco Jose"]
[Black "Letelier Martner, Rene"]
[Result "0-1"]
[ECO "D36"]
[EventDate "1961.03.12"]
[PlyCount "81"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. cxd5 exd5 7. Bd3 Nbd7 8. Nf3 c6 9. Qc2 Re8 10. O-O Nf8 11. Rab1 Ne4 12. Bxe7 Qxe7 13. Bxe4 dxe4 14. Nd2 f5 15. b4 a6 16. a4 Be6 17. b5 axb5 18. axb5 Ng6 19. bxc6 bxc6 20. Rb6 Rac8 21. Re1 Qg5 22. f4 Qd8 23. Rb7 c5 24. Nb5 Re7 25. Rxe7 Qxe7 26. dxc5 Rxc5 27. Qa4 Qd7 28. Qa8+ Rc8 29. Qa6 Bf7 30. Nd4 Nxf4 31. Rf1 Nd5 32. Nxf5 Bg6 33. Nd6 Rd8 34. N2xe4 Nxe3 35. Qa2+ Kh8 36. Rf7 Bxf7 37. Nxf7+ Qxf7 38. Qxf7 Rd1+ 39. Kf2 Rf1+ 40. Kxe3 Rxf7 41. Nd2 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.18"]
[Round "7"]
[White "Rossetto, Hector Decio"]
[Black "Quinones, Oscar Carillo"]
[Result "1-0"]
[ECO "D36"]
[EventDate "1961.03.12"]
[PlyCount "81"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. cxd5 exd5 6. Qc2 Nbd7 7. e3 c6 8. Bd3 O-O 9. Nf3 Re8 10. O-O Nf8 11. Rab1 Ne4 12. Bxe4 Bxg5 13. Bd3 Bf6 14. b4 a6 15. a4 b5 16. h3 g6 17. e4 Be6 18. Rfe1 Qd7 19. exd5 Bxd5 20. Nxd5 cxd5 21. axb5 Rac8 22. Qa2 axb5 23. Rxe8 Rxe8 24. Qa6 Re6 25. Qa5 Qb7 26. Rc1 Ra6 27. Rc7 Rxa5 28. Rxb7 Ra1+ 29. Kh2 Ne6 30. Ne5 Rd1 31. Bxb5 Rxd4 32. Nxf7 Bg7 33. Bc6 Rd2 34. b5 Nf4 35. Kg3 Ne2+ 36. Kf3 Nc3 37. Ng5 Nd1 38. Rb8+ Bf8 39. Ne6 Rxf2+ 40. Kg3 Rf6 41. Bxd5 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.18"]
[Round "7"]
[White "Silva Nazzari, Roberto"]
[Black "Pelikan, Jorge"]
[Result "0-1"]
[ECO "A88"]
[EventDate "1961.03.12"]
[PlyCount "54"]

1. d4 d6 2. Nf3 g6 3. g3 Bg7 4. Bg2 f5 5. O-O Nf6 6. b3 O-O 7. Bb2 c6 8. c4 Na6 9. Nc3 Qc7 10. Rc1 e5 11. dxe5 dxe5 12. Qc2 e4 13. Nd4 Ng4 14. Nd1 Rd8 15. e3 Nb4 16. Qb1 Nd3 17. Rc2 Nxb2 18. Nxb2 Bxd4 19. exd4 Rxd4 20. Rd1 c5 21. f3 Nf6 22. Rcd2 Qe5 23. Re2 Bd7 24. fxe4 fxe4 25. Nd3 Qd6 26. Nf2 Bf5 27. Rde1 e3 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.18"]
[Round "7"]
[White "Wexler, Bernardo"]
[Black "Dominguez, Cristobal"]
[Result "1/2-1/2"]
[ECO "E91"]
[EventDate "1961.03.12"]
[PlyCount "39"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. d4 d6 6. Be2 e5 7. O-O Bg4 8. d5 c5 9. h3 Bc8 10. Ne1 Ne8 11. f4 exf4 12. Bxf4 Nd7 13. Nd3 Qe7 14. Qd2 Ne5 15. Nxe5 Bxe5 16. Bd3 Ng7 17. Rae1 Bd7 18. Bxe5 Qxe5 19. Rf3 Rab8 20. Ref1 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.19"]
[Round "8"]
[White "Bielicki, Carlos"]
[Black "Perez Perez, Francisco Jose"]
[Result "1/2-1/2"]
[ECO "E68"]
[EventDate "1961.03.12"]
[PlyCount "94"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nbd7 7. O-O e5 8. e4 Re8 9. d5 Rf8 10. Ne1 Ne8 11. Nd3 f5 12. f3 h5 13. Be3 h4 14. Qd2 Nef6 15. Bg5 hxg3 16. hxg3 c6 17. b4 a5 18. a3 axb4 19. axb4 Rxa1 20. Rxa1 Qb6+ 21. Be3 Qc7 22. dxc6 bxc6 23. Ra7 Qb8 24. Qa2 Nh5 25. Bf2 Ndf6 26. Qa5 Be6 27. Nb2 Nd7 28. b5 Nc5 29. Qc7 Nb3 30. bxc6 Nd4 31. Qxb8 Rxb8 32. Rb7 Nxc6 33. Rxb8+ Nxb8 34. Nb5 Bf8 35. Bh3 Bd7 36. Kg2 fxe4 37. fxe4 Nf6 38. Bxd7 Nbxd7 39. Kf3 Kf7 40. Nc7 Bh6 41. Nd3 Bd2 42. Nd5 Nh7 43. Ke2 Ba5 44. Be3 Nhf8 45. N3b4 Bxb4 46. Nxb4 Ne6 47. Na6 Kf6 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.19"]
[Round "8"]
[White "Camara, Ronald"]
[Black "Byrne, Robert"]
[Result "0-1"]
[ECO "E73"]
[EventDate "1961.03.12"]
[PlyCount "82"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bg5 O-O 6. Be2 h6 7. Be3 e5 8. d5 Nbd7 9. Qd2 Nc5 10. f3 Nh5 11. O-O-O Kh7 12. g4 Nf4 13. h4 Bd7 14. Nh3 Nxe2+ 15. Qxe2 Na4 16. Nxa4 Bxa4 17. Rd2 Qe7 18. Qd3 Bd7 19. Ng1 f5 20. gxf5 gxf5 21. Rg2 f4 22. Bf2 Rg8 23. Ne2 Qf7 24. Rhg1 a6 25. Nc3 Bf6 26. c5 dxc5 27. Bxc5 Bxh4 28. d6 Rxg2 29. Rxg2 cxd6 30. Qxd6 Re8 31. Kb1 Bg3 32. Nd5 Re6 33. Qb8 Bc6 34. Rd2 h5 35. Nb4 Re8 36. Qd6 Re6 37. Qd8 Be8 38. Nd5 Rg6 39. Ne7 Bh4 40. Qc7 Rg7 41. Qxe5 Bxe7 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.19"]
[Round "8"]
[White "Dominguez, Cristobal"]
[Black "Quinones, Oscar Carillo"]
[Result "1-0"]
[ECO "B99"]
[EventDate "1961.03.12"]
[PlyCount "63"]

1. e4 c5 2. Ne2 Nf6 3. Nbc3 d6 4. d4 cxd4 5. Nxd4 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. O-O-O Nbd7 10. g4 b5 11. Bxf6 Nxf6 12. g5 Nd7 13. f5 Bxg5+ 14. Kb1 Ne5 15. Qh5 Qd8 16. Nxe6 Bxe6 17. fxe6 O-O 18. Rg1 Bf6 19. Bh3 Kh8 20. Nd5 g6 21. Qe2 fxe6 22. Bxe6 Bg7 23. Rdf1 Qa5 24. Nf4 Nc4 25. c3 Rae8 26. Bd5 Bxc3 27. bxc3 Na3+ 28. Kb2 Rc8 29. Qd3 Nc4+ 30. Bxc4 bxc4 31. Qd4+ Kg8 32. Qd5+ 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.19"]
[Round "8"]
[White "Filip, Miroslav"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "D77"]
[EventDate "1961.03.12"]
[PlyCount "37"]

1. d4 Nf6 2. Nf3 g6 3. Nbd2 d5 4. g3 Bg7 5. Bg2 O-O 6. O-O Nc6 7. c4 dxc4 8. Nxc4 Be6 9. b3 Bd5 10. Bb2 Qc8 11. Rc1 Rd8 12. e3 a5 13. a3 h6 14. Qe2 Qe6 15. Rfd1 Ne8 16. Qc2 Nd6 17. Ne1 a4 18. Bxd5 Qxd5 19. bxa4 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.19"]
[Round "8"]
[White "Letelier Martner, Rene"]
[Black "Rossetto, Hector Decio"]
[Result "0-1"]
[ECO "A12"]
[EventDate "1961.03.12"]
[PlyCount "124"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 Bf5 4. O-O c6 5. b3 Nbd7 6. Bb2 Qc7 7. c4 e6 8. d3 Be7 9. Nbd2 O-O 10. Re1 a5 11. e4 dxe4 12. dxe4 Bg6 13. Nh4 Nc5 14. Nxg6 hxg6 15. e5 Nfd7 16. Ne4 Nxe4 17. Rxe4 Nc5 18. Re3 Rfd8 19. Qc2 Rd7 20. Bf1 Rad8 21. Bc3 Bg5 22. f4 Be7 23. Kh1 Qb6 24. Rf3 Na6 25. a3 Bc5 26. Ra2 Rd1 27. Kg2 Be3 28. Qe2 Bc5 29. Qc2 Qc7 30. h4 R1d7 31. Be2 Qb6 32. Rf1 Bd4 33. Be1 Be3 34. Rf3 Bd4 35. Qb1 Bc5 36. Qc1 Bd4 37. Bd2 Qc7 38. b4 axb4 39. axb4 c5 40. b5 Nb4 41. Bxb4 cxb4 42. Rd2 Bc3 43. Rxd7 Rxd7 44. Rd3 Rxd3 45. Bxd3 Qc5 46. Kf3 Qa7 47. Qe3 Qa1 48. Kg4 b6 49. Bc2 Bd4 50. Qb3 Qa3 51. Kf3 Qc1 52. Kg4 Qe1 53. Qd3 Bf2 54. Bb3 Kh7 55. Kh3 Qh1+ 56. Kg4 Qh2 57. c5 Bxc5 58. Bc2 Bf2 59. Bb1 Kh6 60. Qb3 f5+ 61. exf6 gxf6 62. f5 gxf5+ 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.19"]
[Round "8"]
[White "Pelikan, Jorge"]
[Black "Matanovic, Aleksandar"]
[Result "0-1"]
[ECO "E71"]
[EventDate "1961.03.12"]
[PlyCount "144"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 O-O 6. Be3 e5 7. d5 c6 8. g4 cxd5 9. cxd5 a6 10. a4 Qa5 11. Bd3 Nbd7 12. Nge2 Nc5 13. Ng3 Qb4 14. Ra3 Nfd7 15. O-O Qxb2 16. Nb1 Qb4 17. Bc2 Qa5 18. Qc1 Qd8 19. Nd2 Rb8 20. a5 b5 21. axb6 Nxb6 22. Kg2 Bd7 23. Rh1 Rc8 24. Qb1 Bb5 25. h4 Ncd7 26. Bd3 Bxd3 27. Qxd3 Nc5 28. Qb1 Rb8 29. Qa2 Qc8 30. f3 Nbd7 31. Nc4 Qc7 32. Rc1 Rb5 33. Na5 Qb6 34. Nc4 Qb8 35. Rc2 Rb4 36. Kh3 Rb7 37. Na5 Rb1 38. Nc4 Rb4 39. Bd2 Rb5 40. Be3 Re8 41. Na5 Rb1 42. Bc1 Bf8 43. Ne2 Qb5 44. Nc4 Rb3 45. Rxb3 Qxb3 46. Qxb3 Nxb3 47. Ba3 Rc8 48. Ne3 Rxc2 49. Nxc2 Nd2 50. Kg2 Nc4 51. Nc3 Be7 52. Kg3 Bd8 53. Bc1 Ba5 54. Na4 Ndb6 55. Nxb6 Bxb6 56. g5 a5 57. f4 exf4+ 58. Kxf4 Bf2 59. Na3 Ne5 60. Nb5 Bc5 61. Ba3 Bxa3 62. Nxa3 Kf8 63. Ke3 Ke7 64. Nb5 a4 65. Kd4 Nf3+ 66. Ke3 Nxh4 67. e5 dxe5 68. Ke4 f5+ 69. Kxe5 Nf3+ 70. Kf4 Nd2 71. Ke5 Nc4+ 72. Kd4 a3 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.19"]
[Round "8"]
[White "Reinhardt, Enrique"]
[Black "Goldenberg, Edgardo"]
[Result "1/2-1/2"]
[ECO "E61"]
[EventDate "1961.03.12"]
[PlyCount "113"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Bg5 O-O 5. Nf3 d6 6. e3 h6 7. Bh4 g5 8. Bg3 c5 9. h3 cxd4 10. Nxd4 Nc6 11. Be2 Nxd4 12. exd4 Be6 13. O-O d5 14. Bf3 Rc8 15. c5 Ne4 16. Rc1 f5 17. Bh2 Bf7 18. Be2 f4 19. Bg4 Rc6 20. Re1 Nf6 21. Bf3 h5 22. Re5 g4 23. hxg4 Nxg4 24. Rg5 e5 25. Rxe5 Nxh2 26. Kxh2 Bxe5 27. dxe5 Rxc5 28. Ne2 Rxc1 29. Qxc1 Qe7 30. Qxf4 Re8 31. Qg3+ Kh8 32. Nf4 Qxe5 33. Bxd5 Qe7 34. Bxf7 Qxf7 35. Ng6+ Kh7 36. Ne5 Qf5 37. Nf3 Rg8 38. Qc7+ Rg7 39. Qc3 Qf4+ 40. g3 Qf5 41. Qe3 Qd5 42. a3 b6 43. b4 a5 44. bxa5 bxa5 45. Qf4 Re7 46. Qf8 Rb7 47. Qf6 Rg7 48. Qf4 Qc5 49. Ne5 Kg8 50. Qf5 Qf8 51. Qc2 Qxa3 52. Qc4+ Kh8 53. Qc8+ Kh7 54. Qf5+ Kg8 55. Qe6+ Kh7 56. Qf5+ Kg8 57. Qe6+ 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.19"]
[Round "8"]
[White "Wexler, Bernardo"]
[Black "Silva Nazzari, Roberto"]
[Result "1-0"]
[ECO "E97"]
[EventDate "1961.03.12"]
[PlyCount "57"]

1. Nf3 Nf6 2. c4 g6 3. d4 Bg7 4. Nc3 O-O 5. e4 d6 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. b4 Nh5 10. g3 f5 11. Ng5 Nf6 12. f3 h6 13. Ne6 Bxe6 14. dxe6 c6 15. b5 d5 16. cxd5 cxd5 17. Nxd5 Nfxd5 18. exd5 Nxd5 19. Bc4 Qb6+ 20. Kh1 Ne7 21. Ba3 Rfe8 22. Qe2 e4 23. Rad1 exf3 24. Rxf3 Rad8 25. Rd7 Bf8 26. Rfd3 Kh8 27. Qd2 Rc8 28. Bb2+ Kg8 29. Qc3 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.23"]
[Round "9"]
[White "Byrne, Robert"]
[Black "Pelikan, Jorge"]
[Result "1/2-1/2"]
[ECO "A86"]
[EventDate "1961.03.12"]
[PlyCount "100"]

1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nh3 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 e5 8. dxe5 dxe5 9. Qxd8 Rxd8 10. Nd5 Rd7 11. Bg5 Kf7 12. f4 Ng4 13. fxe5 Bxe5 14. Bf4 Bxf4 15. Rxf4 c6 16. Ng5+ Ke8 17. Rxg4 cxd5 18. Rh4 dxc4 19. Rxc4 Na6 20. Rac1 Kd8 21. Ne6+ Ke7 22. Nf4 Kd8 23. b4 b5 24. Bxa8 bxc4 25. Rxc4 Rd2 26. a4 g5 27. Nd3 Rxe2 28. b5 Nc7 29. Bf3 Rd2 30. Ne5 g4 31. Bg2 Be6 32. Rc5 Rd1+ 33. Kf2 Rd2+ 34. Kf1 Ra2 35. Nc6+ Kd7 36. Nxa7 Rxa4 37. b6 Ra1+ 38. Kf2 Ra2+ 39. Ke3 Na6 40. Bc6+ Kd6 41. Rc1 Rb2 42. Bb5 Nb8 43. b7 Bd5 44. Rc8 Bxb7 45. Rxb8 Kc7 46. Rh8 Rxh2 47. Bd3 Rg2 48. Bxf5 Rxg3+ 49. Kf4 Rb3 50. Kxg4 Kb6 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.23"]
[Round "9"]
[White "Goldenberg, Edgardo"]
[Black "Filip, Miroslav"]
[Result "1/2-1/2"]
[ECO "D25"]
[EventDate "1961.03.12"]
[PlyCount "75"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 g6 5. Bxc4 Bg7 6. O-O O-O 7. Nc3 Nfd7 8. Qe2 Nb6 9. Bb3 Nc6 10. Rd1 Bd7 11. Ne4 a5 12. a4 Bf5 13. Nc5 Nd7 14. Nd3 e6 15. Bd2 Qe7 16. Rac1 Be4 17. Bc3 Rfd8 18. Nd2 Bxd3 19. Qxd3 Nb6 20. Qb5 Ra6 21. Ne4 Nd5 22. Be1 Rb6 23. Qc4 Ncb4 24. Nc5 Bh6 25. Bd2 Rb8 26. Qe2 Rd6 27. Qf3 b6 28. Ne4 Rdd8 29. Nc3 Rbc8 30. g3 c6 31. Ne4 Bg7 32. Be1 e5 33. dxe5 Bxe5 34. Bxb4 Nxb4 35. Nc3 Nd3 36. Nd5 Rxd5 37. Bxd5 Nxc1 38. Rxc1 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.23"]
[Round "9"]
[White "Matanovic, Aleksandar"]
[Black "Wexler, Bernardo"]
[Result "1-0"]
[ECO "B82"]
[EventDate "1961.03.12"]
[PlyCount "43"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. f4 a6 7. Bd3 b5 8. e5 dxe5 9. fxe5 Nd5 10. Qh5 g6 11. Qg4 Nxc3 12. bxc3 Bg7 13. O-O O-O 14. Ba3 Re8 15. Qf4 Ra7 16. Bd6 Qb6 17. a4 Nc6 18. axb5 axb5 19. Rxa7 Qxa7 20. Bxb5 Nxd4 21. cxd4 Rd8 22. c4 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.23"]
[Round "9"]
[White "Najdorf, Miguel"]
[Black "Camara, Ronald"]
[Result "1-0"]
[ECO "A70"]
[EventDate "1961.03.12"]
[PlyCount "71"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 a6 8. a4 Bg4 9. Qb3 Bxf3 10. Qxb7 Bxg2 11. Bxg2 Nbd7 12. Bf4 Nh5 13. Bh3 f5 14. Bg5 Rb8 15. Bxd8 Rxb7 16. Ba5 Ne5 17. Bf1 Nf3+ 18. Kd1 Rxb2 19. Ra2 Rxa2 20. Nxa2 Bg7 21. exf5 Kf7 22. Bc7 Rc8 23. fxg6+ hxg6 24. Bxd6 Rd8 25. Be2 Rxd6 26. Bxf3 Nf4 27. Kc2 Nxd5 28. Rd1 Nb4+ 29. Nxb4 Rxd1 30. Bxd1 cxb4 31. a5 Be5 32. Kb3 Bxh2 33. Be2 Bg1 34. f3 Kf6 35. Bxa6 Kf5 36. Kxb4 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.23"]
[Round "9"]
[White "Perez Perez, Francisco Jose"]
[Black "Reinhardt, Enrique"]
[Result "1-0"]
[ECO "B53"]
[EventDate "1961.03.12"]
[PlyCount "77"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 a6 5. c4 Nc6 6. Qd1 Nf6 7. Nc3 g6 8. c5 Qa5 9. cxd6 Nxe4 10. Be2 Bg7 11. O-O Nxd6 12. Nd5 Be6 13. Nf4 Bd7 14. Nd5 Be6 15. Nf4 Bg4 16. Bd2 Qd8 17. Bc3 Bxc3 18. bxc3 O-O 19. Ng5 Bxe2 20. Qxe2 Qa5 21. Qg4 Qxc3 22. Rab1 h5 23. Nxh5 gxh5 24. Qxh5 Qh8 25. Qd1 Nd4 26. Re1 N4f5 27. Rb4 Qf6 28. Rg4 Ng7 29. Qd3 Qf5 30. Qg3 Rfc8 31. Ne6 Qxg4 32. Qxg4 fxe6 33. h4 Rc4 34. Qg6 Rxh4 35. Rxe6 Rc8 36. g3 Ra4 37. Rxe7 Nde8 38. Qf7+ Kh8 39. Qf8+ 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.23"]
[Round "9"]
[White "Quinones, Oscar Carillo"]
[Black "Letelier Martner, Rene"]
[Result "0-1"]
[ECO "B45"]
[EventDate "1961.03.12"]
[PlyCount "133"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Bb4 6. Ndb5 Nf6 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O 11. O-O h6 12. Bf4 Re8 13. Re1 Rxe1+ 14. Qxe1 Be6 15. Qd2 Nd7 16. Re1 Qf6 17. Be2 Rd8 18. Bc7 Rc8 19. Bg3 Nb6 20. Bf3 Nd4 21. Bd1 Nc4 22. Qc1 Nf5 23. Bf3 Nxg3 24. hxg3 Nxb2 25. Nxd5 Bxd5 26. Bxd5 Nd3 27. cxd3 Rxc1 28. Rxc1 Qd8 29. Be4 g6 30. Bxb7 Qxd3 31. a4 Qa3 32. Rc8+ Kg7 33. Bc6 Qc1+ 34. Kh2 Qc5 35. Kg1 a5 36. Bd7 Qd6 37. Bb5 Qd1+ 38. Kh2 Qh5+ 39. Kg1 Qd1+ 40. Kh2 Qh5+ 41. Kg1 Qe5 42. Re8 Qa1+ 43. Kh2 Qd4 44. Kg1 h5 45. Re3 Qd2 46. Re2 Qd1+ 47. Kh2 f5 48. Re3 Qd4 49. Kg1 Kf6 50. Re8 Kf7 51. Re3 h4 52. gxh4 Qxh4 53. Rc3 Qd4 54. Rc7+ Kf6 55. Rc6+ Kg7 56. Rc7+ Kf6 57. Rc6+ Ke5 58. Rc8 Qd1+ 59. Kh2 Qd2 60. Re8+ Kf6 61. Re2 Qd4 62. Kg1 g5 63. Re8 f4 64. Rf8+ Ke7 65. Re8+ Kf7 66. Rc8 g4 67. Rc7+ 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.23"]
[Round "9"]
[White "Rossetto, Hector Decio"]
[Black "Bielicki, Carlos"]
[Result "1-0"]
[ECO "E96"]
[EventDate "1961.03.12"]
[PlyCount "91"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. Be2 O-O 6. Nf3 e5 7. O-O Nbd7 8. Re1 c6 9. Bf1 a5 10. dxe5 dxe5 11. Na4 Qe7 12. Qc2 Ne8 13. Bg5 f6 14. Be3 Nc7 15. c5 Ne6 16. Bc4 Kh8 17. Bb3 f5 18. exf5 gxf5 19. Qc4 Re8 20. Rad1 e4 21. Qxe6 Qxe6 22. Bxe6 Rxe6 23. Nh4 Rf6 24. f3 Rf8 25. Bd4 Bxd4+ 26. Rxd4 Nf6 27. Nb6 Rb8 28. Nxc8 Rbxc8 29. Nxf5 exf3 30. gxf3 Nd5 31. Nd6 Rc7 32. Kf2 Rd7 33. Re6 Rg7 34. Re8 Rxe8 35. Nxe8 Rd7 36. a3 Re7 37. Re4 Rd7 38. Ra4 b6 39. cxb6 Nxb6 40. Rf4 Rd2+ 41. Ke3 Rg2 42. Rf8+ Rg8 43. Rxg8+ Kxg8 44. Nd6 Kg7 45. Kd4 Nd7 46. Nc4 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.23"]
[Round "9"]
[White "Silva Nazzari, Roberto"]
[Black "Dominguez, Cristobal"]
[Result "0-1"]
[ECO "B00"]
[EventDate "1961.03.12"]
[PlyCount "62"]

1. e4 Nc6 2. Nf3 Nf6 3. e5 Ng8 4. d4 d6 5. Bb5 a6 6. Ba4 b5 7. Bb3 d5 8. Nc3 e6 9. Ne2 Na5 10. c3 Nxb3 11. axb3 b4 12. Bd2 Nh6 13. Nf4 c5 14. Nd3 bxc3 15. bxc3 Bd7 16. dxc5 Bb5 17. Be3 Nf5 18. Bd4 Be7 19. Qc2 O-O 20. O-O Qc7 21. Rfe1 Bxd3 22. Qxd3 Bxc5 23. Rxa6 Rxa6 24. Qxa6 Bxd4 25. cxd4 Qc3 26. Qb6 Nh4 27. Rf1 Nxf3+ 28. gxf3 Qxf3 29. Re1 Qg4+ 30. Kh1 h5 31. Re3 Ra8 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.24"]
[Round "10"]
[White "Bielicki, Carlos"]
[Black "Quinones, Oscar Carillo"]
[Result "1/2-1/2"]
[ECO "D71"]
[EventDate "1961.03.12"]
[PlyCount "186"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. Nc3 Nxc3 7. bxc3 O-O 8. e3 c5 9. Ne2 Nc6 10. O-O Qa5 11. Qb3 Rd8 12. a4 Bd7 13. Ba3 cxd4 14. cxd4 Rac8 15. Rab1 Bf5 16. Rbc1 Qa6 17. Nf4 e5 18. dxe5 Bxe5 19. Nd5 Be6 20. Rfd1 Na5 21. Rxc8 Rxc8 22. Qb4 Nc6 23. Qb5 Kh8 24. Qxa6 bxa6 25. Rc1 Na5 26. Rxc8+ Bxc8 27. f4 Ba1 28. Bc5 Bd7 29. Nc7 Bxa4 30. Nxa6 Nc6 31. Bxc6 Bxc6 32. Bxa7 Kg8 33. Bd4 Bxd4 34. exd4 Kf8 35. Nb4 Bb7 36. Kf2 Ke7 37. Ke3 Kd6 38. h4 Bg2 39. f5 Bh3 40. fxg6 fxg6 41. Kf4 h6 42. g4 Bf1 43. g5 h5 44. Nc2 Bd3 45. Ne1 Bb1 46. Ng2 Kd5 47. Ke3 Bf5 48. Nf4+ Kd6 49. Kd2 Kc6 50. Kc3 Bb1 51. Kb4 Kd6 52. Kb5 Be4 53. Kb6 Bb1 54. Kb7 Bf5 55. Kb8 Kc6 56. Ka7 Be4 57. Kb8 Bf5 58. Ka8 Be4 59. Kb8 Bf5 60. Ka7 Be4 61. Ka6 Bf5 62. Ka5 Be4 63. Kb4 Bb1 64. Kc4 Ba2+ 65. Kc3 Bb1 66. Kd2 Be4 67. Ke3 Bb1 68. Ne2 Bf5 69. Ng3 Bc2 70. Ne2 Kd6 71. Nc3 Bf5 72. Ne4+ Kd5 73. Nf6+ Kd6 74. Kd2 Bb1 75. Kc3 Ba2 76. Kb2 Be6 77. Kc3 Ba2 78. Kd3 Be6 79. Ke4 Bf5+ 80. Kf4 Bd3 81. Ke3 Bc2 82. Kd2 Bb1 83. Kc1 Bd3 84. Kb2 Bc4 85. Ka3 Bd5 86. Kb4 Be6 87. Kb5 Bb3 88. Kb6 Bc4 89. Kb7 Be6 90. Kb8 Bh3 91. d5 Bf5 92. Kb7 Bh3 93. Kb6 Bg2 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.24"]
[Round "10"]
[White "Camara, Ronald"]
[Black "Goldenberg, Edgardo"]
[Result "1/2-1/2"]
[ECO "E70"]
[EventDate "1961.03.12"]
[PlyCount "79"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Bg5 d6 6. f4 c5 7. d5 Qa5 8. Bd3 b5 9. cxb5 c4 10. Bc2 a6 11. bxa6 Nbd7 12. Nf3 Rb8 13. O-O Rxb2 14. Na4 Rb8 15. Nd4 Qxa6 16. Nc6 Ra8 17. e5 dxe5 18. fxe5 Ne4 19. Bxe7 Re8 20. Bxe4 Qxa4 21. Qf3 Nxe5 22. Nxe5 Rxe7 23. d6 Rxe5 24. Bxa8 Qa7+ 25. Kh1 Rf5 26. Qe4 Bxa1 27. Qe8+ Kg7 28. Rxa1 Qxa8 29. d7 Qxa2 30. Qf8+ Kxf8 31. d8=Q+ Kg7 32. Qd4+ f6 33. Rxa2 Rf1+ 34. Qg1 Rxg1+ 35. Kxg1 h5 36. Ra7+ Kh6 37. Rc7 Be6 38. Rc6 Bd5 39. Rc5 Bf7 40. Rc7 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.24"]
[Round "10"]
[White "Dominguez, Cristobal"]
[Black "Letelier Martner, Rene"]
[Result "1/2-1/2"]
[ECO "B28"]
[EventDate "1961.03.12"]
[PlyCount "114"]

1. e4 c5 2. Nf3 a6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 Qc7 6. Nd5 Qd8 7. Be3 Rb8 8. Nb5 Qa5+ 9. c3 axb5 10. Bb6 Qxb6 11. Nxb6 Nf6 12. f3 e6 13. Bxb5 Bc5 14. Nxc8 Rxc8 15. Qe2 O-O 16. Bxc6 Rxc6 17. Qb5 Rb8 18. a4 Ne8 19. Ke2 Nc7 20. Qd3 Rd8 21. b4 Be7 22. b5 Rc5 23. c4 d5 24. cxd5 exd5 25. Rhc1 Ne6 26. g3 Bf6 27. Rxc5 Nxc5 28. Qc2 b6 29. Ra2 d4 30. Kd1 d3 31. Qb1 Bc3 32. a5 bxa5 33. b6 Bb4 34. Rxa5 Bxa5 35. Qb5 Bxb6 36. Qxb6 Rc8 37. Kd2 h6 38. Qa7 Kf8 39. e5 Ke8 40. f4 g6 41. g4 Nd7 42. Kxd3 g5 43. fxg5 hxg5 44. Kd4 Nf8 45. Qa4+ Ke7 46. Ke4 Ne6 47. Kf5 Rc5 48. Qa7+ Rc7 49. Qa3+ Rc5 50. Qa7+ Rc7 51. Qa3+ Rc5 52. h4 gxh4 53. g5 h3 54. Qxh3 Rc4 55. Qa3+ Ke8 56. Qa8+ Ke7 57. Qa3+ Ke8 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.24"]
[Round "10"]
[White "Filip, Miroslav"]
[Black "Perez Perez, Francisco Jose"]
[Result "1-0"]
[ECO "E62"]
[EventDate "1961.03.12"]
[PlyCount "55"]

1. c4 g6 2. g3 Bg7 3. Bg2 Nf6 4. d4 O-O 5. Nc3 d6 6. Nf3 Nc6 7. O-O Bg4 8. d5 Bxf3 9. exf3 Na5 10. Qd3 c5 11. Rb1 a6 12. b3 Rb8 13. a4 Ne8 14. Bd2 b6 15. Rfe1 Nc7 16. Bh3 Re8 17. Ne4 Nb7 18. Ng5 b5 19. f4 h6 20. Nf3 Bf6 21. Re4 Na8 22. axb5 axb5 23. g4 Nb6 24. g5 hxg5 25. f5 gxf5 26. Bxf5 Kg7 27. Nxg5 Rh8 28. Qg3 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.24"]
[Round "10"]
[White "Pelikan, Jorge"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "B25"]
[EventDate "1961.03.12"]
[PlyCount "68"]

1. d3 g6 2. g3 Bg7 3. Bg2 c5 4. Nf3 Nc6 5. O-O Nf6 6. e4 d6 7. Nc3 O-O 8. Nh4 Ne8 9. Be3 Nc7 10. Qd2 Nd4 11. Nd1 e5 12. c3 Nde6 13. Bh6 f5 14. Bxg7 Kxg7 15. exf5 gxf5 16. Re1 f4 17. Qe2 Qf6 18. Nf3 Bd7 19. Nd2 Bc6 20. Qg4+ Kh8 21. Bxc6 bxc6 22. Ne4 Qe7 23. Qh4 Qxh4 24. gxh4 Rad8 25. f3 Rf5 26. Rb1 Rh5 27. b4 cxb4 28. Rxb4 Rxh4 29. Rb7 a6 30. Rb6 d5 31. Nd2 Rg8+ 32. Kh1 Ng5 33. Rxc6 Nh3 34. Rxc7 Rh5 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.24"]
[Round "10"]
[White "Reinhardt, Enrique"]
[Black "Rossetto, Hector Decio"]
[Result "0-1"]
[ECO "B00"]
[EventDate "1961.03.12"]
[PlyCount "60"]

1. e4 Nc6 2. d4 e5 3. dxe5 Nxe5 4. f4 Ng6 5. Be3 d5 6. exd5 Nf6 7. Bb5+ Bd7 8. Be2 Bb4+ 9. Nc3 O-O 10. Qd4 Bxc3+ 11. bxc3 Re8 12. O-O-O Re4 13. Qd2 Qe7 14. Bd4 Qa3+ 15. Kb1 Nxd5 16. Bc4 Rxd4 17. Qxd4 Nxc3+ 18. Ka1 Nxd1 19. Bxf7+ Kxf7 20. Qxd7+ Qe7 21. Qxd1 Rd8 22. Qe2 Qf6+ 23. Kb1 Rd4 24. Nf3 Rb4+ 25. Kc1 Nxf4 26. Ne5+ Kg8 27. Qe3 Nxg2 28. Qc5 Qf4+ 29. Kd1 Rb1+ 30. Ke2 Qe4+ 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.24"]
[Round "10"]
[White "Silva Nazzari, Roberto"]
[Black "Matanovic, Aleksandar"]
[Result "0-1"]
[ECO "E70"]
[EventDate "1961.03.12"]
[PlyCount "52"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bg5 c5 6. d5 e6 7. dxe6 Bxe6 8. e5 dxe5 9. Qxd8+ Kxd8 10. Ne4 Nbd7 11. Rd1 Ke7 12. Nf3 h6 13. Nxf6 Nxf6 14. Be3 Nd7 15. g3 e4 16. Nd2 f5 17. b3 Rad8 18. Bg2 Bd4 19. Ke2 Ne5 20. f3 Bxe3 21. Kxe3 Rd3+ 22. Ke2 Rhd8 23. fxe4 f4 24. h3 Re3+ 25. Kf2 Nd3+ 26. Kg1 Nb2 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.24"]
[Round "10"]
[White "Wexler, Bernardo"]
[Black "Byrne, Robert"]
[Result "0-1"]
[ECO "E70"]
[EventDate "1961.03.12"]
[PlyCount "74"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bg5 O-O 6. f4 c6 7. Nf3 Bg4 8. h3 Bxf3 9. Qxf3 Nbd7 10. O-O-O Ne8 11. f5 c5 12. Nd5 Nef6 13. Bxf6 Bxf6 14. Nxf6+ exf6 15. Qf4 Qe7 16. d5 a6 17. Kb1 Rab8 18. a4 Qe5 19. Qg4 Nb6 20. b3 Qc3 21. Ka2 Qc2+ 22. Ka3 Nxa4 23. Qe2 Qxe2 24. Bxe2 Nc3 25. Rde1 Nxe4 26. g4 Rfe8 27. Bf3 Nf2 28. Rhf1 Nxh3 29. fxg6 hxg6 30. Rxe8+ Rxe8 31. Bg2 Ng5 32. Rxf6 Re1 33. Rxd6 Ra1+ 34. Kb2 Rg1 35. Bh3 Nxh3 36. Rb6 Rxg4 37. Rxb7 Nf2 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.25"]
[Round "11"]
[White "Byrne, Robert"]
[Black "Silva Nazzari, Roberto"]
[Result "1-0"]
[ECO "E54"]
[EventDate "1961.03.12"]
[PlyCount "111"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 d5 5. e3 O-O 6. Bd3 c5 7. O-O dxc4 8. Bxc4 b6 9. Qe2 Bb7 10. Rd1 cxd4 11. exd4 Nbd7 12. Bb3 Bxc3 13. bxc3 Qc7 14. c4 Rfd8 15. Bb2 Qf4 16. Rd3 Nf8 17. Ne5 Ng6 18. Nxg6 hxg6 19. Rad1 Rd7 20. Qe5 Qe4 21. f3 Qxe5 22. dxe5 Rxd3 23. Rxd3 Ne8 24. a4 Bc6 25. Ba3 Rc8 26. c5 Nc7 27. cxb6 axb6 28. Rc3 Bb7 29. Kf2 Nd5 30. Rxc8+ Bxc8 31. Bb2 Kf8 32. Bd4 Bd7 33. Ke2 Ke8 34. Kd2 Bc6 35. g3 Kd7 36. f4 Kc7 37. Bb2 Kb7 38. Kd3 Ka6 39. Bc1 b5 40. axb5+ Kxb5 41. Ba3 Nc7 42. Bf8 Ne8 43. Bd1 Kb6 44. h4 Kc7 45. g4 Bg2 46. Ke3 Kd8 47. Bc2 f5 48. exf6 Nxf6 49. Bxg7 Nd5+ 50. Kf2 Bh3 51. Bd1 Nxf4 52. Kg3 e5 53. Bxe5 Nd3 54. Bf6+ Ke8 55. Be2 Nc5 56. Kxh3 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.25"]
[Round "11"]
[White "Goldenberg, Edgardo"]
[Black "Pelikan, Jorge"]
[Result "0-1"]
[ECO "A88"]
[EventDate "1961.03.12"]
[PlyCount "50"]

1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 c6 8. Qc2 Na6 9. Rd1 Qe8 10. b3 h6 11. Bb2 g5 12. d5 c5 13. Ne1 Qh5 14. e3 f4 15. exf4 gxf4 16. Qe2 Ng4 17. h3 fxg3 18. fxg3 Rf2 19. hxg4 Rxe2 20. gxh5 Rxb2 21. Rac1 Bg4 22. Bf3 Bxf3 23. Nxf3 Rf8 24. Rd2 Bxc3 25. Rxc3 Rxf3 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.25"]
[Round "11"]
[White "Letelier Martner, Rene"]
[Black "Bielicki, Carlos"]
[Result "1-0"]
[ECO "B88"]
[EventDate "1961.03.12"]
[PlyCount "113"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. a3 Be7 8. O-O O-O 9. Ba2 Nxd4 10. Qxd4 b6 11. Bg5 Bb7 12. Rad1 Qc7 13. Rfe1 Rfd8 14. Bb3 Rac8 15. Bh4 Bc6 16. Rd3 Ne8 17. Bxe7 Qxe7 18. f4 Nf6 19. Rg3 e5 20. fxe5 dxe5 21. Qf2 Rd6 22. Rf3 Kh8 23. Qh4 Bd7 24. Ref1 Be6 25. g4 Bxb3 26. cxb3 h6 27. Kh1 Rf8 28. Rf5 Re6 29. Qg3 g6 30. R5f3 Kg7 31. R1f2 Rd6 32. Rxf6 Rxf6 33. Nd5 Rxf2 34. Nxe7 Rf4 35. Qd3 Rxg4 36. Qd5 Rg5 37. Qd7 h5 38. Nd5 Rg4 39. Nc3 Rg5 40. Qe7 Rg4 41. Qxe5+ f6 42. Qd6 Rf7 43. b4 h4 44. Qe6 Rg5 45. a4 Re5 46. Qh3 g5 47. Qg4 Kh6 48. Qc8 Kg7 49. Qd8 h3 50. Kg1 Rfe7 51. Kf2 Re8 52. Qd7+ Kg6 53. Qxa7 f5 54. Qxb6+ R8e6 55. Qd8 fxe4 56. Ke3 Kf5 57. Ne2 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.25"]
[Round "11"]
[White "Matanovic, Aleksandar"]
[Black "Dominguez, Cristobal"]
[Result "1-0"]
[ECO "C97"]
[EventDate "1961.03.12"]
[PlyCount "81"]

1. e4 Nc6 2. Nf3 e5 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 Bd7 13. Nf1 Nc4 14. Qe2 h6 15. b3 Nb6 16. dxe5 dxe5 17. c4 Nh7 18. Bb2 Bf6 19. Ne3 Rfe8 20. a4 bxa4 21. bxa4 a5 22. Nd5 Qc6 23. Rab1 Rab8 24. Bc3 Ng5 25. Nxg5 hxg5 26. Bxa5 Bd8 27. Bc3 Ra8 28. a5 Na4 29. Bxa4 Qxa4 30. Ra1 Qc6 31. Red1 Qc8 32. Rd2 Ra7 33. f3 f6 34. Rda2 Re6 35. Rb1 Kf7 36. Rab2 Bc7 37. Qe3 Rc6 38. Rb5 Qf8 39. Qd2 Rca6 40. Rb7 Qc8 41. Nxc7 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.25"]
[Round "11"]
[White "Najdorf, Miguel"]
[Black "Wexler, Bernardo"]
[Result "1-0"]
[ECO "E11"]
[EventDate "1961.03.12"]
[PlyCount "103"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 O-O 5. a3 Bxd2+ 6. Qxd2 b6 7. Qc2 Bb7 8. Bg5 d6 9. e3 Nbd7 10. Be2 h6 11. Bh4 g5 12. Bg3 Ne4 13. h4 g4 14. Bf4 f5 15. Nd2 Qf6 16. Nxe4 Bxe4 17. Qa4 e5 18. Qxd7 exf4 19. f3 Bb7 20. fxg4 fxe3 21. O-O-O f4 22. d5 Rf7 23. Qa4 a5 24. Qc2 Raf8 25. g5 Qg7 26. g6 Rf6 27. h5 Bc8 28. Qe4 Bf5 29. Qd4 Qe7 30. Bf3 Bd7 31. Qc3 Rf5 32. Rd4 Re5 33. Rdd1 Qg5 34. Qc2 Bg4 35. Qe2 Bxf3 36. gxf3 b5 37. cxb5 Rff5 38. Qc4 Qe7 39. Kb1 Kg7 40. Rc1 Qf6 41. Qxc7+ Re7 42. Qd8 e2 43. Rc7 Rfe5 44. Re1 Rxc7 45. Qxc7+ Re7 46. Qc3 a4 47. b6 Re3 48. Qc7+ Re7 49. Qc2 Qe5 50. b7 Rxb7 51. Rxe2 Qd4 52. Re4 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.25"]
[Round "11"]
[White "Perez Perez, Francisco Jose"]
[Black "Camara, Ronald"]
[Result "1-0"]
[ECO "E88"]
[EventDate "1961.03.12"]
[PlyCount "63"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 c6 8. Qd2 cxd5 9. cxd5 a6 10. g4 h5 11. h3 Nbd7 12. O-O-O b5 13. Kb1 Rb8 14. Rc1 Qa5 15. Bd3 Nc5 16. Nge2 Bd7 17. Rhg1 b4 18. Nd1 Nxd3 19. Qxd3 Bb5 20. Qd2 Bxe2 21. Qxe2 Rfc8 22. Rc4 Rc7 23. b3 Rxc4 24. Qxc4 Qb5 25. Nb2 Qxc4 26. Nxc4 hxg4 27. hxg4 Ne8 28. Rc1 Bf6 29. Na5 Rb5 30. Rc8 Rxa5 31. Rxe8+ Kg7 32. g5 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.25"]
[Round "11"]
[White "Quinones, Oscar Carillo"]
[Black "Reinhardt, Enrique"]
[Result "0-1"]
[ECO "C88"]
[EventDate "1961.03.12"]
[PlyCount "66"]

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 Bb7 9. d3 d6 10. c3 d5 11. axb5 axb5 12. Rxa8 Bxa8 13. exd5 Nxd5 14. Nxe5 Nxe5 15. Rxe5 Bf6 16. Re1 Qd7 17. Nd2 b4 18. Ne4 Be7 19. Bg5 Bxg5 20. Nxg5 Nf4 21. Nxf7 Rxf7 22. Qg4 Bd5 23. Bxd5 Nxd5 24. Qc4 bxc3 25. bxc3 h6 26. Re5 c6 27. g3 Rf8 28. d4 Qf7 29. f4 Qg6 30. Kf2 Kh7 31. Qc5 Ra8 32. Re2 Ra1 33. c4 Nc3 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.25"]
[Round "11"]
[White "Rossetto, Hector Decio"]
[Black "Filip, Miroslav"]
[Result "1/2-1/2"]
[ECO "D03"]
[EventDate "1961.03.12"]
[PlyCount "76"]

1. d4 Nf6 2. Nf3 d5 3. Bg5 c6 4. e3 Bf5 5. Bd3 Bxd3 6. cxd3 e6 7. O-O Be7 8. Nc3 h6 9. Bh4 O-O 10. Na4 Nbd7 11. Rc1 Nh5 12. Bxe7 Qxe7 13. Qb3 Rab8 14. Qc3 Nhf6 15. b4 Rfc8 16. Rb1 Ne8 17. Rfc1 Nd6 18. h3 Nf8 19. Nc5 Ra8 20. a4 a6 21. Ne5 f6 22. Nf3 Qf7 23. Nb3 g5 24. Qc2 Qg6 25. Qe2 Rc7 26. Re1 Rg7 27. e4 g4 28. Nh4 Qg5 29. Qxg4 dxe4 30. dxe4 Qxg4 31. hxg4 Rxg4 32. e5 fxe5 33. dxe5 Rxh4 34. exd6 Rxb4 35. Nc5 Rxb1 36. Rxb1 b5 37. a5 Kf7 38. Rb3 Rd8 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.26"]
[Round "12"]
[White "Camara, Ronald"]
[Black "Rossetto, Hector Decio"]
[Result "0-1"]
[ECO "B00"]
[EventDate "1961.03.12"]
[PlyCount "76"]

1. d4 Nc6 2. e4 e5 3. d5 Nce7 4. Bd3 Nf6 5. Be3 Ng6 6. h4 h5 7. f3 Bb4+ 8. c3 Ba5 9. Na3 Bb6 10. Nc4 Bxe3 11. Nxe3 d6 12. Ne2 a5 13. g3 Bd7 14. Qd2 Qb8 15. c4 Qa7 16. Nf5 Bxf5 17. exf5 Nf8 18. Nc3 N8d7 19. O-O-O Qc5 20. Na4 Qb4 21. Qxb4 axb4 22. b3 Ra5 23. Kb2 Ke7 24. Rhe1 Rha8 25. Ra1 Kf8 26. Be4 Ke7 27. Red1 Nxe4 28. fxe4 Nf6 29. Re1 g6 30. fxg6 fxg6 31. Re3 Rf8 32. Rf1 b6 33. Ree1 Raa8 34. Kc2 Rf7 35. Kd3 Raf8 36. Nb2 Ng4 37. Rxf7+ Rxf7 38. Nd1 Rf3+ 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.26"]
[Round "12"]
[White "Dominguez, Cristobal"]
[Black "Bielicki, Carlos"]
[Result "0-1"]
[ECO "B67"]
[EventDate "1961.03.12"]
[PlyCount "72"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 a6 7. Qd2 Bd7 8. O-O-O e6 9. f4 b5 10. Bxb5 axb5 11. Ndxb5 h6 12. Bxf6 gxf6 13. Rhe1 Nb4 14. Nxd6+ Bxd6 15. Qxd6 Nxa2+ 16. Nxa2 Rxa2 17. Kb1 Ra7 18. Re3 Qc7 19. Qb4 Ra4 20. Rc3 Qa7 21. Ra3 Rxb4 22. Rxa7 Bc8 23. Rd3 O-O 24. Rg3+ Kh7 25. Rc3 Bb7 26. f5 Ra8 27. Rxa8 Bxa8 28. Rc7 Rb7 29. Rc8 Ra7 30. e5 exf5 31. exf6 Bxg2 32. Kc1 Rd7 33. Re8 Bf3 34. c4 Kg6 35. b4 Rd4 36. Rc8 Be2 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.26"]
[Round "12"]
[White "Filip, Miroslav"]
[Black "Quinones, Oscar Carillo"]
[Result "1-0"]
[ECO "E07"]
[EventDate "1961.03.12"]
[PlyCount "87"]

1. c4 e6 2. g3 d5 3. Bg2 Nf6 4. Nf3 Be7 5. O-O O-O 6. d4 Nbd7 7. Nc3 c6 8. b3 b6 9. Bb2 Bb7 10. e3 c5 11. Qe2 Rc8 12. Ne5 Qc7 13. Nxd7 Qxd7 14. dxc5 bxc5 15. Rfd1 Rfd8 16. Rac1 Bc6 17. Ne4 Nxe4 18. Bxe4 f5 19. Bg2 Qb7 20. cxd5 Bxd5 21. Bxd5 exd5 22. Rc2 Rd7 23. Qd3 Rf8 24. Rcd2 Qc6 25. Rc1 Qe6 26. Qb5 Rfd8 27. Ba3 Qb6 28. Qd3 Qa5 29. Bb2 Qb4 30. Rdc2 Rf8 31. f3 Qa5 32. Kg2 Qb4 33. h3 Rf7 34. g4 Bf8 35. a3 c4 36. bxc4 Qb7 37. c5 Bxc5 38. Rxc5 Qxb2+ 39. R1c2 Qf6 40. Rxd5 fxg4 41. Rc8+ Rf8 42. Rxf8+ Qxf8 43. Rxd7 Qxf3+ 44. Kg1 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.26"]
[Round "12"]
[White "Matanovic, Aleksandar"]
[Black "Byrne, Robert"]
[Result "1/2-1/2"]
[ECO "C16"]
[EventDate "1961.03.12"]
[PlyCount "52"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Ne7 5. a3 Bxc3+ 6. bxc3 b6 7. a4 Ba6 8. Bxa6 Nxa6 9. Qg4 Nf5 10. Nf3 Qd7 11. O-O O-O-O 12. a5 Kb7 13. Nd2 f6 14. Qe2 Ra8 15. Re1 fxe5 16. Qxe5 Rhe8 17. Qe2 Nd6 18. Ba3 Qc6 19. Qd3 h6 20. Re3 Qb5 21. Qg6 Nf5 22. Rxe6 Nh4 23. Qf7 Rxe6 24. Qxe6 Qxa5 25. Qe2 Qxc3 26. Nb3 Qc4 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.26"]
[Round "12"]
[White "Pelikan, Jorge"]
[Black "Perez Perez, Francisco Jose"]
[Result "1-0"]
[ECO "A07"]
[EventDate "1961.03.12"]
[PlyCount "81"]

1. d3 d5 2. g3 e5 3. Nf3 Nc6 4. Bg2 Nf6 5. c3 Be7 6. O-O O-O 7. Bg5 a5 8. Nbd2 Be6 9. e4 dxe4 10. dxe4 Nd7 11. Bxe7 Qxe7 12. Qe2 Rfd8 13. Nc4 Bxc4 14. Qxc4 Nb6 15. Qb5 Rd6 16. Rfd1 Rad8 17. Rxd6 Rxd6 18. Bf1 g6 19. Re1 Kg7 20. h4 Rf6 21. Re3 Qe6 22. b3 a4 23. Kg2 Qe7 24. bxa4 Qa3 25. Nxe5 Qxa2 26. Rf3 Rxf3 27. Kxf3 Qc2 28. Nxc6 Qxc3+ 29. Qd3 Qxc6 30. Qd4+ Qf6+ 31. Qxf6+ Kxf6 32. a5 Nd7 33. Ke3 Nc5 34. Bc4 c6 35. f4 Ke7 36. g4 f6 37. g5 fxg5 38. hxg5 Ne6 39. Bxe6 Kxe6 40. Kd4 Kd6 41. f5 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.26"]
[Round "12"]
[White "Reinhardt, Enrique"]
[Black "Letelier Martner, Rene"]
[Result "0-1"]
[ECO "A12"]
[EventDate "1961.03.12"]
[PlyCount "88"]

1. Nf3 d5 2. g3 Bf5 3. Bg2 Nf6 4. O-O c6 5. b3 Nbd7 6. c4 e6 7. Bb2 Be7 8. d3 O-O 9. Nc3 h6 10. Qc2 Bh7 11. Rfe1 a5 12. e4 dxe4 13. dxe4 Nc5 14. Rad1 Qc7 15. Nd4 Rfd8 16. Qe2 e5 17. Nf5 Bf8 18. Qf3 Nfd7 19. Bc1 Ne6 20. Qg4 Kh8 21. h4 Bb4 22. Qf3 Bxf5 23. exf5 Nd4 24. Rxd4 exd4 25. Bf4 Bd6 26. Bxd6 Qxd6 27. Ne4 Qe5 28. g4 Nc5 29. g5 Re8 30. gxh6 Nxe4 31. Rxe4 Qxe4 32. hxg7+ Kg8 33. Qh5 Qe1+ 34. Bf1 Kxg7 35. Qg5+ Kf8 36. f6 Re2 37. Qg7+ Ke8 38. Qg8+ Kd7 39. Qxf7+ Kc8 40. Qg8+ Kc7 41. Qg3+ Kb6 42. c5+ Ka7 43. f7 Rf8 44. Qf3 Re7 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.26"]
[Round "12"]
[White "Silva Nazzari, Roberto"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "E82"]
[EventDate "1961.03.12"]
[PlyCount "48"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. f3 c5 6. Nge2 b6 7. Be3 d6 8. Qd2 Nc6 9. d5 Ne5 10. Nc1 e6 11. b3 exd5 12. cxd5 a6 13. Nd3 Nfd7 14. Rc1 f5 15. Be2 Nxd3+ 16. Bxd3 Ne5 17. O-O f4 18. Bf2 g5 19. h3 Bxh3 20. Bxc5 Bxg2 21. Kxg2 bxc5 22. Be2 g4 23. fxg4 Qg5 24. Qd1 h5 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.26"]
[Round "12"]
[White "Wexler, Bernardo"]
[Black "Goldenberg, Edgardo"]
[Result "1-0"]
[ECO "A36"]
[EventDate "1961.03.12"]
[PlyCount "81"]

1. c4 g6 2. Nc3 Bg7 3. g3 c5 4. Bg2 Nc6 5. e3 e5 6. Nge2 Nge7 7. O-O O-O 8. d3 Rb8 9. b3 a6 10. Bb2 b5 11. Nd5 d6 12. h3 Be6 13. Qd2 Qd7 14. Kh2 f5 15. f4 h6 16. Rac1 b4 17. d4 cxd4 18. exd4 e4 19. Nxe7+ Nxe7 20. d5 Bxb2 21. Qxb2 Bf7 22. Ra1 Qc7 23. g4 Kh7 24. Rg1 Rg8 25. Bh1 a5 26. Rg3 Rbe8 27. Rag1 fxg4 28. hxg4 Nc8 29. Re3 Qd8 30. g5 Qb6 31. Qd2 Ne7 32. Ng3 Nf5 33. Rxe4 Nxg3 34. Rxg3 Rxe4 35. Bxe4 Re8 36. Bb1 h5 37. f5 Re5 38. Qf4 gxf5 39. g6+ Bxg6 40. Qg5 Re2+ 41. Kh3 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.28"]
[Round "13"]
[White "Bielicki, Carlos"]
[Black "Reinhardt, Enrique"]
[Result "1-0"]
[ECO "E14"]
[EventDate "1961.03.12"]
[PlyCount "99"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 Bb4+ 6. Nbd2 O-O 7. O-O d5 8. a3 Be7 9. b4 a5 10. b5 Nbd7 11. Bb2 Bd6 12. cxd5 exd5 13. Ne5 Ne4 14. Ndf3 f6 15. Nc6 Qe8 16. Qb3 Qf7 17. a4 Rfe8 18. Ba3 Bxa3 19. Qxa3 Bxc6 20. bxc6 Nb8 21. Rac1 Na6 22. Bxa6 Rxa6 23. Qd3 Raa8 24. Ne1 Rad8 25. Nc2 Re6 26. Na3 f5 27. Nb5 Rh6 28. h3 g5 29. Kh2 g4 30. f3 gxh3 31. g4 Nd6 32. Nxd6 Rdxd6 33. gxf5 Rxc6 34. Rg1+ Kf8 35. Qa6 Qe8 36. Rxc6 Rxc6 37. Qd3 Rh6 38. Qa3+ Kf7 39. Qd3 Qxa4 40. e4 Qa2+ 41. Kh1 Qf2 42. Qc3 Kf8 43. Qa3+ Kf7 44. e5 c5 45. dxc5 Qxc5 46. Qa4 Qe7 47. Qg4 Qf8 48. Rc1 Qd8 49. e6+ Kf6 50. f4 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.28"]
[Round "13"]
[White "Byrne, Robert"]
[Black "Dominguez, Cristobal"]
[Result "0-1"]
[ECO "B00"]
[EventDate "1961.03.12"]
[PlyCount "64"]

1. d4 Nc6 2. Nf3 d6 3. e4 Bg4 4. Bb5 a6 5. Ba4 Nf6 6. c4 Nd7 7. Be3 e5 8. d5 Bxf3 9. Qxf3 Ne7 10. Nc3 Ng6 11. h4 Be7 12. h5 Ngf8 13. Qg4 Bf6 14. b4 h6 15. c5 Bg5 16. O-O Nh7 17. Bxg5 hxg5 18. c6 bxc6 19. Bxc6 Rb8 20. b5 axb5 21. Nxb5 Nhf6 22. Qxg5 Rxh5 23. Qxg7 Ke7 24. Na7 Rh7 25. Qg5 Qh8 26. g3 Rg8 27. Qf5 Rh5 28. Qf3 Qh7 29. Bxd7 Rh8 30. Bh3 Rxh3 31. Nc6+ Kf8 32. Qf5 Rxg3+ 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.28"]
[Round "13"]
[White "Goldenberg, Edgardo"]
[Black "Silva Nazzari, Roberto"]
[Result "1-0"]
[ECO "A70"]
[EventDate "1961.03.12"]
[PlyCount "49"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Bf4 O-O 9. Nd2 Ne8 10. Be2 b6 11. O-O Na6 12. Nc4 f5 13. exf5 Rxf5 14. Bg3 Nac7 15. Bg4 Rf7 16. Bxc8 Rxc8 17. Ne4 Rf5 18. Ne3 Rf7 19. Nc4 Rf5 20. Ncxd6 Nxd6 21. Nxd6 Rxd5 22. Qb3 Rb8 23. Rad1 Bd4 24. Ne4 Rc8 25. Nc3 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.28"]
[Round "13"]
[White "Letelier Martner, Rene"]
[Black "Filip, Miroslav"]
[Result "1/2-1/2"]
[ECO "D27"]
[EventDate "1961.03.12"]
[PlyCount "90"]

1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 c5 6. O-O a6 7. dxc5 Bxc5 8. Qxd8+ Kxd8 9. Nc3 b5 10. Bd3 Bb7 11. Ng5 Ke7 12. Nce4 Nxe4 13. Nxe4 Bb6 14. b3 Nc6 15. Ba3+ b4 16. Bb2 Rhd8 17. Rfd1 f6 18. Ng3 h6 19. Rac1 Rac8 20. h4 Rd5 21. Be4 Rxd1+ 22. Rxd1 Na5 23. Bb1 Bc6 24. Nh5 Kf7 25. Nf4 Nb7 26. Bd3 Nc5 27. Bc4 Ke7 28. Bd4 Bd7 29. Bxc5+ Rxc5 30. Ng6+ Ke8 31. Rd6 Rc6 32. Rxc6 Bxc6 33. Bxa6 Be4 34. Nf4 g5 35. hxg5 hxg5 36. Ne2 Bc7 37. Nc1 Be5 38. Bd3 Bb2 39. Bxe4 Bxc1 40. Kf1 Ke7 41. Ke2 Kd6 42. Bh7 Kc5 43. Kd3 e5 44. g4 Bb2 45. Bg8 Bc1 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.28"]
[Round "13"]
[White "Najdorf, Miguel"]
[Black "Matanovic, Aleksandar"]
[Result "1-0"]
[ECO "E14"]
[EventDate "1961.03.12"]
[PlyCount "49"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 Be7 6. O-O O-O 7. Nc3 d5 8. b3 Nbd7 9. Bb2 c5 10. Qe2 cxd4 11. exd4 Rc8 12. Rad1 Qc7 13. Ne5 dxc4 14. bxc4 Rfd8 15. f4 Nf8 16. f5 a6 17. fxe6 fxe6 18. Kh1 Ba8 19. d5 Re8 20. Ng4 exd5 21. Nxd5 Nxd5 22. cxd5 Bxd5 23. Nh6+ Kh8 24. Qg4 Bd6 25. Nf7+ 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.28"]
[Round "13"]
[White "Perez Perez, Francisco Jose"]
[Black "Wexler, Bernardo"]
[Result "1-0"]
[ECO "B39"]
[EventDate "1961.03.12"]
[PlyCount "87"]

1. e4 g6 2. d4 Bg7 3. Nf3 c5 4. c4 cxd4 5. Nxd4 Nc6 6. Be3 Nf6 7. Nc3 Ng4 8. Qxg4 Nxd4 9. Qd1 Ne6 10. Qd2 b6 11. Be2 Bb7 12. O-O Qb8 13. Rad1 Bc6 14. Nd5 Qb7 15. Bh6 d6 16. Bxg7 Nxg7 17. Qh6 Ne6 18. b4 O-O-O 19. a4 Bxa4 20. Rd2 Bc6 21. Ra1 Rd7 22. Bg4 b5 23. cxb5 Bxb5 24. h4 Kb8 25. h5 Qc8 26. Qe3 Rb7 27. Rda2 Qd7 28. Rc1 Rc8 29. Rac2 Rxc2 30. Rxc2 Qd8 31. e5 Ba4 32. Rc1 a5 33. bxa5 Qxa5 34. Bf3 Nc5 35. exd6 exd6 36. Qf4 Rd7 37. Rxc5 Qxc5 38. Qxa4 Rb7 39. Ne3 Rb1+ 40. Kh2 Qe5+ 41. g3 d5 42. Kg2 Rb2 43. Nxd5 g5 44. Nb4 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.28"]
[Round "13"]
[White "Quinones, Oscar Carillo"]
[Black "Camara, Ronald"]
[Result "1/2-1/2"]
[ECO "E64"]
[EventDate "1961.03.12"]
[PlyCount "87"]

1. d4 Nf6 2. c4 c5 3. d5 d6 4. Nc3 g6 5. g3 Bg7 6. Bg2 O-O 7. Nf3 Na6 8. O-O Rb8 9. Ne1 Nc7 10. a4 a6 11. a5 b5 12. axb6 Rxb6 13. Nd3 e6 14. Na4 Rb8 15. e4 exd5 16. exd5 Bf5 17. Re1 Qd7 18. Bf4 Bxd3 19. Qxd3 Rb4 20. Qc2 Rfb8 21. Bd2 Rb3 22. Bc3 Nh5 23. Ra3 Rxa3 24. bxa3 Nf6 25. Nb2 Re8 26. Qd2 Qf5 27. Rxe8+ Ncxe8 28. Qd3 Qg5 29. f4 Qg4 30. Bf3 Qd7 31. Qe2 h5 32. Kg2 Qb7 33. Qc2 Qd7 34. Nd1 Ng4 35. h3 Nh6 36. Ne3 Bxc3 37. Qxc3 Nf5 38. Be4 Neg7 39. Bxf5 Nxf5 40. Qd3 Nxe3+ 41. Qxe3 Qf5 42. Qe8+ Kg7 43. Qe2 Qb1 44. a4 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.28"]
[Round "13"]
[White "Rossetto, Hector Decio"]
[Black "Pelikan, Jorge"]
[Result "1-0"]
[ECO "A88"]
[EventDate "1961.03.12"]
[PlyCount "87"]

1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 c6 8. Rb1 a5 9. d5 e5 10. dxe6 Bxe6 11. b3 Na6 12. Ng5 Bc8 13. Bb2 h6 14. Nf3 g5 15. e3 Ng4 16. Qd2 Qe7 17. Rbd1 Rd8 18. Na4 Bxb2 19. Qxb2 Be6 20. Nd4 Rf8 21. Qd2 Rad8 22. Qxa5 Bc8 23. Qd2 Nc5 24. Nb6 Be6 25. Nxe6 Qxe6 26. Qc1 Ne5 27. Nd5 Rf7 28. Nc3 f4 29. exf4 gxf4 30. gxf4 Rg7 31. Kh1 Ned3 32. Qe3 Qg6 33. Rg1 Re8 34. Bd5+ cxd5 35. Rxg6 Rxe3 36. Rxg7+ Kxg7 37. Rg1+ Kf7 38. fxe3 dxc4 39. bxc4 Nb2 40. Kg2 Nxc4 41. Kf3 Nd7 42. Rd1 Ke6 43. Nb5 Nf6 44. Rd4 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.29"]
[Round "14"]
[White "Byrne, Robert"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "D72"]
[EventDate "1961.03.12"]
[PlyCount "44"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. e4 Nb4 7. d5 c6 8. Ne2 cxd5 9. a3 N4a6 10. exd5 O-O 11. Nbc3 Nc7 12. Nf4 Ne8 13. O-O Nd6 14. Re1 Nd7 15. Nd3 Nf6 16. Bf4 Bf5 17. Ne5 Nd7 18. g4 Nxe5 19. Bxe5 Bxe5 20. Rxe5 Bd7 21. Qe2 Re8 22. Re1 Qb6 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.29"]
[Round "14"]
[White "Camara, Ronald"]
[Black "Letelier Martner, Rene"]
[Result "0-1"]
[ECO "D36"]
[EventDate "1961.03.12"]
[PlyCount "80"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. Bg5 Be7 6. e3 O-O 7. Qc2 Nbd7 8. Bd3 Re8 9. cxd5 exd5 10. O-O-O Nf8 11. h3 Ne4 12. Bf4 Nxc3 13. Qxc3 Bd6 14. Bxd6 Qxd6 15. Kb1 b6 16. g4 Bb7 17. Rhg1 Rac8 18. Nh4 g6 19. Rg3 Nd7 20. e4 dxe4 21. Bc4 b5 22. Bb3 Qf6 23. Nf3 Rcd8 24. Nd2 Nb6 25. Re3 Qxd4 26. Nxe4 Qxc3 27. Rxd8 Qxb2+ 28. Kxb2 Rxd8 29. Nc5 Bc8 30. Re7 Rd2+ 31. Kc3 Rxf2 32. Rxa7 Rf3+ 33. Kd4 Kg7 34. Be6 Rf6 35. g5 Rxe6 36. Nxe6+ Bxe6 37. Kc5 Na4+ 38. Kxc6 Nc3 39. h4 Bxa2 40. Kc5 Bc4 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.29"]
[Round "14"]
[White "Dominguez, Cristobal"]
[Black "Reinhardt, Enrique"]
[Result "1/2-1/2"]
[ECO "C88"]
[EventDate "1961.03.12"]
[PlyCount "85"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. d3 O-O 9. Nbd2 Na5 10. Nf1 c5 11. Bg5 Nxb3 12. axb3 Ne8 13. Bxe7 Qxe7 14. Ne3 Be6 15. c4 Nc7 16. Nd2 g6 17. f4 f6 18. Rf1 Bd7 19. f5 gxf5 20. Nxf5 Bxf5 21. Rxf5 Ne6 22. Rf2 bxc4 23. bxc4 Rab8 24. Nf1 Rb6 25. Ne3 Nf4 26. Rxf4 exf4 27. Nd5 Qb7 28. Nxb6 Qxb6 29. h3 Qxb2 30. Rxa6 Qd4+ 31. Kh2 Kh8 32. Qf3 Qe5 33. Ra2 f5 34. Rf2 fxe4 35. Qxe4 Qg5 36. Qf3 Kg7 37. Re2 Rf5 38. Re6 d5 39. cxd5 Rxd5 40. Qe4 Rf5 41. Re7+ Kh6 42. Re6+ Rf6 43. Kg1 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.29"]
[Round "14"]
[White "Filip, Miroslav"]
[Black "Bielicki, Carlos"]
[Result "1-0"]
[ECO "E94"]
[EventDate "1961.03.12"]
[PlyCount "75"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Be2 d6 6. Nf3 e5 7. O-O c6 8. d5 c5 9. Bg5 h6 10. Bh4 Qb6 11. Nd2 Nh7 12. Rb1 Bf6 13. Bxf6 Nxf6 14. a3 Qd8 15. b4 Na6 16. Nb5 Qe7 17. Qb3 Kg7 18. Qe3 Ne8 19. Bd3 b6 20. h3 Qg5 21. Qxg5 hxg5 22. Rb2 Kf6 23. Ra1 Ke7 24. Be2 Nf6 25. Nc3 Nd7 26. Bd1 Bb7 27. Ba4 Nab8 28. Nf3 f6 29. h4 g4 30. Nd2 Rh8 31. g3 Rc8 32. Nd1 f5 33. Ne3 fxe4 34. Nxe4 Nf6 35. Nxf6 Kxf6 36. Nxg4+ Kf5 37. f3 cxb4 38. Bc2+ 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.29"]
[Round "14"]
[White "Matanovic, Aleksandar"]
[Black "Goldenberg, Edgardo"]
[Result "1-0"]
[ECO "E70"]
[EventDate "1961.03.12"]
[PlyCount "111"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. Bg5 O-O 6. f4 c5 7. d5 Qa5 8. Bd3 b5 9. cxb5 c4 10. Bc2 a6 11. bxa6 Nxa6 12. Qd2 Nc5 13. Nge2 Nb3 14. Bxb3 cxb3 15. a3 Qb6 16. Bh4 Ba6 17. Bf2 Qc7 18. Rd1 Nd7 19. Bd4 Bh6 20. Qe3 Rfc8 21. O-O Nc5 22. Qh3 Bg7 23. Bxg7 Kxg7 24. Qe3 Qa7 25. Qd4+ Kg8 26. Rf2 Bxe2 27. Nxe2 Na4 28. Qxa7 Rxa7 29. Nd4 Rc4 30. Re2 Nc5 31. Re3 Raa4 32. Nxb3 Nxb3 33. Rxb3 Rxe4 34. Rf3 Re2 35. b4 Ra2 36. Rdd3 h5 37. Rb3 h4 38. Rfe3 Kg7 39. h3 Kf6 40. Rbc3 Rd2 41. Rc7 e6 42. dxe6 fxe6 43. Rc8 Ra2 44. Re8 e5 45. fxe5+ dxe5 46. Rf3+ Kg7 47. Re7+ Kh6 48. Rxe5 R2xa3 49. Rxa3 Rxa3 50. Kf2 Rb3 51. Re4 Rb2+ 52. Kf3 Rb3+ 53. Kf4 Rb2 54. Ke5 Rxg2 55. Rxh4+ Kg7 56. Kd5 1-0

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.29"]
[Round "14"]
[White "Pelikan, Jorge"]
[Black "Quinones, Oscar Carillo"]
[Result "1/2-1/2"]
[ECO "A03"]
[EventDate "1961.03.12"]
[PlyCount "105"]

1. f4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O c5 6. d3 d5 7. c3 Nc6 8. a4 Qb6 9. h3 Rd8 10. Qe1 d4 11. c4 Qc7 12. Na3 a6 13. Nc2 e5 14. fxe5 Nxe5 15. Nxe5 Qxe5 16. Bf4 Qe7 17. b4 Nh5 18. bxc5 Nxf4 19. Rxf4 Be5 20. Rf3 Qxc5 21. Rb1 Rb8 22. Qd2 Bd7 23. Nb4 Bxa4 24. Qg5 Qd6 25. Nd5 Bc6 26. Ne7+ Kf8 27. Nxc6 bxc6 28. Rbf1 Rd7 29. h4 Bg7 30. h5 Re8 31. hxg6 hxg6 32. Bh3 Rb7 33. c5 Qd5 34. Qxg6 Kg8 35. Qg4 Qe5 36. R1f2 Qxc5 37. Rf5 Qc1+ 38. Bf1 Qe3 39. Kg2 Qe6 40. Qh4 Qd6 41. Qg4 Qe6 42. Qf3 Qg6 43. Qf4 Re3 44. Rg5 Qh6 45. Qg4 Re6 46. Qf5 Rbe7 47. Qa5 Re5 48. Rxe5 Bxe5 49. Qxa6 Qg5 50. Qc8+ Kg7 51. Qh3 Re6 52. Rf5 Qe3 53. Rf3 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.29"]
[Round "14"]
[White "Silva Nazzari, Roberto"]
[Black "Perez Perez, Francisco Jose"]
[Result "1/2-1/2"]
[ECO "A23"]
[EventDate "1961.03.12"]
[PlyCount "39"]

1. c4 e5 2. Nc3 Nf6 3. g3 c6 4. Bg2 d5 5. cxd5 cxd5 6. Qb3 Nc6 7. Nxd5 Nd4 8. Nxf6+ Qxf6 9. Qd1 Bf5 10. d3 Rc8 11. Rb1 Bb4+ 12. Kf1 O-O 13. Nf3 Nxf3 14. Bxf3 Rfd8 15. e4 Bh3+ 16. Bg2 Bc5 17. Qe2 Bg4 18. f3 Qa6 19. b4 Bd4 20. fxg4 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.03.29"]
[Round "14"]
[White "Wexler, Bernardo"]
[Black "Rossetto, Hector Decio"]
[Result "0-1"]
[ECO "A07"]
[EventDate "1961.03.12"]
[PlyCount "82"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 Bf5 4. O-O c6 5. b3 e6 6. Bb2 Nbd7 7. d3 Bc5 8. c4 O-O 9. Nc3 a5 10. Qc2 Qe7 11. e4 dxe4 12. dxe4 Bg6 13. Qe2 Ba3 14. Bxa3 Qxa3 15. e5 Ne8 16. Nh4 Nc7 17. Rad1 Nc5 18. Nxg6 hxg6 19. Qe3 N7a6 20. Rd2 Rfd8 21. Rfd1 Rxd2 22. Rxd2 a4 23. bxa4 Nxa4 24. Nxa4 Qxa4 25. Bf1 Qa5 26. h4 Rd8 27. Rxd8+ Qxd8 28. c5 Qd1 29. Qc3 Kh7 30. Qc4 Qa1 31. f4 Qe1 32. Kg2 Qe3 33. h5 gxh5 34. Qd3+ Qxd3 35. Bxd3+ Kh6 36. Bxa6 bxa6 37. Kf3 g5 38. Ke3 Kg6 39. Ke4 a5 40. a4 h4 41. g4 gxf4 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.04.01"]
[Round "15"]
[White "Bielicki, Carlos"]
[Black "Camara, Ronald"]
[Result "1/2-1/2"]
[ECO "E70"]
[EventDate "1961.03.12"]
[PlyCount "81"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bg5 h6 6. Be3 Ng4 7. Bc1 c5 8. d5 O-O 9. Be2 f5 10. exf5 gxf5 11. Nf3 e5 12. dxe6 Bxe6 13. O-O Nc6 14. Nb5 d5 15. Bf4 Nge5 16. Nxe5 Bxe5 17. Bxe5 Nxe5 18. cxd5 Bxd5 19. Nc7 Qxc7 20. Qxd5+ Kh7 21. f4 Ng6 22. Bf3 b6 23. Qb7 Qxb7 24. Bxb7 Rad8 25. g3 Rd2 26. Rf2 Rfd8 27. Re1 Kg7 28. Rfe2 Nf8 29. Ba6 Kf6 30. Bc4 Rxe2 31. Rxe2 Rd6 32. Kf2 Ne6 33. Bxe6 Rxe6 34. Rd2 Re4 35. Rd6+ Re6 36. Rd7 Re7 37. Rd5 Re4 38. h3 h5 39. Rd6+ Re6 40. Rd7 Re7 41. Rd6+ 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.04.01"]
[Round "15"]
[White "Goldenberg, Edgardo"]
[Black "Byrne, Robert"]
[Result "0-1"]
[ECO "D74"]
[EventDate "1961.03.12"]
[PlyCount "70"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 d5 6. cxd5 Nxd5 7. O-O Nb6 8. Nc3 Na6 9. e4 Bg4 10. d5 c6 11. h3 Bd7 12. Re1 h6 13. Bf4 Re8 14. Be5 f6 15. Bd4 c5 16. Be3 Nc4 17. Bc1 e5 18. Bf1 Nd6 19. b3 Nc7 20. Be3 b6 21. a4 f5 22. Qc1 Kh7 23. Nd2 Qf6 24. exf5 gxf5 25. Ra2 Qg6 26. Bd3 e4 27. Bf1 Bxc3 28. Qxc3 Nxd5 29. Qc2 f4 30. Bxc5 bxc5 31. Qxc5 fxg3 32. Qxd5 gxf2+ 33. Kxf2 Rf8+ 34. Ke2 Bg4+ 35. hxg4 Qxg4+ 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.04.01"]
[Round "15"]
[White "Letelier Martner, Rene"]
[Black "Pelikan, Jorge"]
[Result "1/2-1/2"]
[ECO "B07"]
[EventDate "1961.03.12"]
[PlyCount "51"]

1. e4 d6 2. d4 Nf6 3. f3 c6 4. c4 e5 5. Nc3 exd4 6. Qxd4 Be7 7. Bg5 O-O 8. Nge2 Na6 9. O-O-O Qa5 10. Bd2 Qb6 11. Qxb6 axb6 12. Be3 Be6 13. Nf4 Nc5 14. Kb1 Nfd7 15. Be2 Ra7 16. Nfd5 Bxd5 17. cxd5 b5 18. a3 f5 19. exf5 Rxf5 20. f4 Rf8 21. Bf3 Rc8 22. Bg4 Rd8 23. Bf3 Rc8 24. Bg4 Rd8 25. Bf3 Rc8 26. Bg4 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.04.01"]
[Round "15"]
[White "Najdorf, Miguel"]
[Black "Dominguez, Cristobal"]
[Result "1/2-1/2"]
[ECO "E62"]
[EventDate "1961.03.12"]
[PlyCount "42"]

1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nc6 7. Nc3 Bg4 8. d5 Na5 9. Nd2 c5 10. Qc2 e5 11. a3 b6 12. b4 Nb7 13. Bb2 Qd7 14. Rab1 Bf5 15. e4 Bh3 16. Nb5 Nh5 17. Qd1 Bh6 18. Nb3 Bxg2 19. Kxg2 f5 20. bxc5 Nxc5 21. Nxc5 bxc5 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.04.01"]
[Round "15"]
[White "Perez Perez, Francisco Jose"]
[Black "Matanovic, Aleksandar"]
[Result "1/2-1/2"]
[ECO "B82"]
[EventDate "1961.03.12"]
[PlyCount "57"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bd3 a6 7. O-O Qc7 8. Kh1 Nbd7 9. f4 Be7 10. Qe1 Nc5 11. Qg3 Nfd7 12. Be3 Bf6 13. Rac1 O-O 14. b4 Nxd3 15. cxd3 Qd8 16. Rc2 Re8 17. a3 Kh8 18. Nf3 Be7 19. Bd4 f6 20. Qf2 b5 21. Be3 Bb7 22. Nd4 Nf8 23. Qg3 d5 24. e5 f5 25. Nb3 d4 26. Nxd4 Rc8 27. Rfc1 Qd7 28. Nb3 Ng6 29. d4 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.04.01"]
[Round "15"]
[White "Quinones, Oscar Carillo"]
[Black "Wexler, Bernardo"]
[Result "1/2-1/2"]
[ECO "C99"]
[EventDate "1961.03.12"]
[PlyCount "54"]

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 Rd8 13. Nf1 cxd4 14. cxd4 Nc6 15. Ne3 g6 16. a3 Nxd4 17. Nxd4 exd4 18. Qxd4 Bb7 19. b4 Bf8 20. Bb2 Bg7 21. Qd2 d5 22. exd5 Nxd5 23. Bxg7 Nxe3 24. Qxe3 Kxg7 25. Rac1 Qc6 26. Qg3 Qf6 27. Bb3 Rac8 1/2-1/2

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.04.01"]
[Round "15"]
[White "Reinhardt, Enrique"]
[Black "Filip, Miroslav"]
[Result "0-1"]
[ECO "D91"]
[EventDate "1961.03.12"]
[PlyCount "80"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5 Ne4 6. cxd5 Nxg5 7. Nxg5 e6 8. Nh3 exd5 9. Nf4 Nc6 10. e3 Ne7 11. Bd3 O-O 12. O-O c5 13. dxc5 d4 14. Nb5 dxe3 15. fxe3 Bxb2 16. Rb1 Be5 17. Qb3 a6 18. Nd6 Bxd6 19. cxd6 Qxd6 20. Be4 Qe5 21. Nd5 Rb8 22. Nf6+ Kg7 23. Rbd1 Be6 24. Qb4 Nc6 25. Qe1 h6 26. Rd2 Rbd8 27. Bxc6 bxc6 28. Rc2 c5 29. h4 Rd3 30. Re2 Rfd8 31. Qf2 Rd1 32. Ree1 Rxe1 33. Qxe1 c4 34. h5 g5 35. Rf3 Rb8 36. e4 c3 37. Qd1 Qc5+ 38. Kh2 Qc7+ 39. Kh1 c2 40. Qc1 Rb1 0-1

[Event "19th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1961.04.01"]
[Round "15"]
[White "Rossetto, Hector Decio"]
[Black "Silva Nazzari, Roberto"]
[Result "1-0"]
[ECO "A23"]
[EventDate "1961.03.12"]
[PlyCount "75"]

1. c4 Nf6 2. Nc3 e5 3. g3 c6 4. Nf3 e4 5. Nd4 d5 6. cxd5 cxd5 7. d3 Bc5 8. Nb3 Bb4 9. a3 Bxc3+ 10. bxc3 O-O 11. Bg2 Nc6 12. O-O Bf5 13. Bg5 h6 14. dxe4 Bxe4 15. Bxe4 dxe4 16. Qxd8 Raxd8 17. Bxf6 gxf6 18. Nc5 f5 19. Nxb7 Rd7 20. Rab1 Rc8 21. Rfd1 Rxd1+ 22. Rxd1 Ne5 23. Rd5 f6 24. Nd6 Rxc3 25. Nxf5 Rxa3 26. Rd4 Kh7 27. Rxe4 Ra1+ 28. Kg2 Ra5 29. f4 Ng6 30. Ne3 Kg7 31. Rc4 h5 32. Rc7+ Kg8 33. Kf3 Kf8 34. Nc4 Ra4 35. Rc8+ Kg7 36. Nd6 Ra5 37. Rc7+ Kh8 38. Rf7 1-0
