[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.22"]
[Round "1"]
[White "Gheorghiu, Florin"]
[Black "Poch, Caesar G."]
[Result "1-0"]
[ECO "D76"]
[EventDate "1971.03.22"]
[PlyCount "59"]

1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nb6 6. Nf3 Bg7 7. O-O O-O 8. d4 Na6 9. b3 c6 10. Bb2 Nc7 11. Qc2 a5 12. Rfd1 Bf5 13. e4 Bg4 14. h3 Bxf3 15. Bxf3 Qc8 16. Bg2 Rd8 17. e5 Ne6 18. Ne4 a4 19. h4 axb3 20. Qxb3 Rd5 21. Nc3 Raa5 22. Qxb6 Rab5 23. Nxb5 Rxb5 24. Qa7 Rxb2 25. Rab1 Rxb1 26. Rxb1 Nd8 27. Qb6 e6 28. a4 Bf8 29. a5 Kg7 30. Qa7 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.22"]
[Round "1"]
[White "Pilnik, Herman"]
[Black "Juarez, Carlos Eleodoro"]
[Result "1-0"]
[ECO "B80"]
[EventDate "1971.03.22"]
[PlyCount "71"]

1. e4 c5 2. Nf3 d6 3. Nc3 e6 4. g3 Be7 5. Bg2 Nf6 6. O-O O-O 7. d4 cxd4 8. Nxd4 a6 9. h3 Qc7 10. g4 Nc6 11. Nde2 b5 12. Ng3 Rd8 13. g5 Ne8 14. a3 Bb7 15. h4 b4 16. Na4 d5 17. exd5 Ne5 18. Qe2 Bxd5 19. Bxd5 Rxd5 20. axb4 Bxb4 21. Bf4 Bd6 22. Nc3 Ra5 23. Nge4 Rxa1 24. Rxa1 Qc4 25. Qe3 Bc7 26. Nd2 Qb4 27. Bxe5 Bxe5 28. Qxe5 Qxb2 29. Rb1 Qxc2 30. Rb8 Rxb8 31. Qxb8 Kf8 32. Qb4+ Kg8 33. Qe7 h6 34. Qxe8+ Kh7 35. Qxf7 hxg5 36. Nde4 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.22"]
[Round "1"]
[White "Planinc, Albin"]
[Black "Browne, Walter Shawn"]
[Result "0-1"]
[ECO "B99"]
[EventDate "1971.03.22"]
[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 h6 9. Bh4 Nbd7 10. O-O-O Qc7 11. Be2 Rb8 12. Rhe1 b5 13. e5 dxe5 14. fxe5 Nxe5 15. Bxb5+ axb5 16. Rxe5 Qxe5 17. Nc6 Bb7 18. Nxe5 Bxf3 19. gxf3 b4 20. Ne4 Rc8 21. Nd6+ Bxd6 22. Rxd6 Nd5 23. Nc6 Ne3 24. Rd3 Nd5 25. Ne5 g5 26. Be1 f6 27. Ng4 Kf7 28. Nf2 Rc6 29. Rd2 Ra8 30. Kb1 Rca6 31. a3 bxa3 32. b3 a2+ 33. Ka1 Ne3 34. Re2 Nd5 35. c4 Nf4 36. Rb2 f5 37. c5 e5 38. b4 Ra3 39. b5 Nd3 40. Nxd3 Rxd3 41. Rxa2 Rxa2+ 42. Kxa2 Ke6 43. Bb4 g4 44. fxg4 f4 45. b6 Kd7 46. b7 Kc7 47. c6 f3 48. Bc5 Rd8 49. Be7 Re8 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.22"]
[Round "1"]
[White "Polugaevsky, Lev"]
[Black "Mecking, Henrique"]
[Result "1-0"]
[ECO "D46"]
[EventDate "1971.03.22"]
[PlyCount "117"]

1. c4 c6 2. Nf3 d5 3. e3 Nf6 4. Nc3 e6 5. b3 Nbd7 6. Bb2 Bd6 7. d4 O-O 8. Bd3 Re8 9. Qc2 e5 10. cxd5 cxd5 11. dxe5 Nxe5 12. Nxe5 Bxe5 13. Ne2 Qd6 14. Bxe5 Qxe5 15. O-O Bd7 16. Nd4 Rac8 17. Qe2 Qd6 18. Qb2 a6 19. Rac1 Ng4 20. Nf3 Qb6 21. Rxc8 Rxc8 22. Rc1 Nf6 23. Rxc8+ Bxc8 24. Qc3 Bd7 25. Nd4 Ne8 26. a4 Qc7 27. Qxc7 Nxc7 28. a5 Kf8 29. Kf1 Ke7 30. Ke2 g6 31. Kd2 Ne6 32. Nxe6 fxe6 33. f4 e5 34. g3 Kd6 35. Kc3 Be6 36. Kb4 exf4 37. gxf4 Bg4 38. Kc3 Bf3 39. Kd4 Bg2 40. h4 Bf3 41. b4 Bh1 42. Be2 Bg2 43. Bg4 Be4 44. Bc8 Kc7 45. Be6 Kd6 46. Bg8 h6 47. Bf7 h5 48. Be8 Bc2 49. Bf7 Be4 50. f5 Bxf5 51. Bxd5 Bc8 52. e4 Ke7 53. Ke5 g5 54. hxg5 h4 55. g6 h3 56. g7 h2 57. g8=Q h1=Q 58. Qf7+ Kd8 59. Qf8+ 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.22"]
[Round "1"]
[White "Rubinetti, Jorge Alberto"]
[Black "Quinteros, Miguel Angel"]
[Result "0-1"]
[ECO "E01"]
[EventDate "1971.03.22"]
[PlyCount "60"]

1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 e6 5. g3 d5 6. Bg2 e5 7. Nb3 d4 8. f4 Bb4+ 9. Bd2 Ng4 10. O-O Bxd2 11. Qxd2 Ne3 12. fxe5 Nxf1 13. Kxf1 Nc6 14. Qf4 O-O 15. N1d2 f6 16. Bd5+ Kh8 17. e6 Qe7 18. Ne4 Bxe6 19. Nbc5 f5 20. Nd6 g5 21. Qf3 Ne5 22. Qh1 Bg8 23. Ncxb7 f4 24. Kg1 f3 25. exf3 Bxd5 26. cxd5 Nxf3+ 27. Kg2 Qe2+ 28. Kh3 h5 29. g4 Ne1 30. gxh5 Qxh5+ 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.22"]
[Round "1"]
[White "Savon, Vladimir"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]
[ECO "C19"]
[EventDate "1971.03.22"]
[PlyCount "90"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qc7 7. Nf3 Ne7 8. Be2 b6 9. a4 Ba6 10. a5 O-O 11. Bxa6 Nxa6 12. Qd3 Qb7 13. Ng5 Ng6 14. h4 cxd4 15. h5 Nc5 16. Qg3 Ne7 17. h6 g6 18. axb6 Ne4 19. Qf4 f5 20. exf6 Rxf6 21. Qe5 Raf8 22. Nxe4 dxe4 23. O-O Qd5 24. cxd4 axb6 25. Bg5 R6f7 26. Bxe7 Rxe7 27. Rab1 Qxe5 28. dxe5 Rf5 29. Rxb6 Rxe5 30. c4 Kf7 31. Rb5 Kf6 32. Rc1 Rc7 33. c5 Kg5 34. Kf1 Kxh6 35. Ke2 Kg5 36. Ke3 Kf5 37. Rc2 Rd5 38. Rc4 Rd3+ 39. Ke2 Rd5 40. Ke3 h5 41. g3 g5 42. Ra5 h4 43. gxh4 gxh4 44. Rxe4 Rcxc5 45. Rxc5 Rxc5 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.22"]
[Round "1"]
[White "Schweber, Samuel"]
[Black "Brond, Victor"]
[Result "1-0"]
[ECO "B47"]
[EventDate "1971.03.22"]
[PlyCount "89"]

1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. g3 Nc6 5. Bg2 Qc7 6. O-O d6 7. d4 cxd4 8. Nxd4 Bd7 9. Nce2 Rc8 10. Nxc6 Bxc6 11. Nd4 Bd7 12. a4 Nf6 13. b3 Be7 14. c4 O-O 15. a5 Rfd8 16. Be3 Qb8 17. f4 d5 18. e5 Ne4 19. Bxe4 dxe4 20. Qc2 b5 21. axb6 Qxb6 22. Qxe4 Bc5 23. Rad1 g6 24. Nc2 Qxb3 25. Bxc5 Rxc5 26. Ne3 Kg7 27. f5 gxf5 28. Qf4 h6 29. Ng4 Rh8 30. Rxd7 Rxc4 31. Qe3 Qxe3+ 32. Nxe3 Re4 33. Ng2 Rxe5 34. Ra7 a5 35. g4 Rd8 36. gxf5 exf5 37. Nh4 Rdd5 38. Rc1 f4 39. Rcc7 Rg5+ 40. Kf1 Rd1+ 41. Ke2 Rh1 42. Rxf7+ Kg8 43. Rfd7 Rxh2+ 44. Kd3 Rg3+ 45. Ke4 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.22"]
[Round "1"]
[White "Sumiacher, Carlos"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "A24"]
[EventDate "1971.03.22"]
[PlyCount "152"]

1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 O-O 5. e4 e5 6. Nge2 d6 7. O-O Be6 8. d3 Qc8 9. f3 c6 10. Bg5 h6 11. Be3 Na6 12. Rc1 Qd7 13. Qa4 Nc5 14. Qc2 a5 15. b3 Bh3 16. d4 Bxg2 17. Kxg2 exd4 18. Nxd4 Qe7 19. Rfe1 Nfd7 20. Rcd1 Rfe8 21. a3 Ne5 22. Bf2 Qf6 23. Nce2 h5 24. Nf4 Ncd7 25. Be3 a4 26. b4 Nb6 27. Nh3 Bf8 28. c5 dxc5 29. bxc5 Nbc4 30. Bg5 Qg7 31. Qc3 Na5 32. f4 Nd7 33. e5 Nxc5 34. Bf6 Qh6 35. Ng5 b6 36. f5 Bg7 37. Bxg7 Qxg5 38. Bf6 Qh6 39. e6 fxe6 40. Nxe6 gxf5 41. Nxc5 bxc5 42. Be5 Qh7 43. Rd6 Qf7 44. Qd2 f4 45. Qc2 Re6 46. Rxe6 Qxe6 47. Bc3 Qf7 48. Re5 Nc4 49. Rg5+ Kf8 50. Bg7+ Ke8 51. Qe4+ Kd7 52. Rxc5 Ne3+ 53. Kg1 Nd5 54. Be5 fxg3 55. hxg3 Rf8 56. Bf4 Qe7 57. Qxe7+ Kxe7 58. Rc4 Nxf4 59. gxf4 Kd6 60. Rxa4 c5 61. Kf2 Kd5 62. Kf3 Rh8 63. Ra7 h4 64. Rd7+ Kc4 65. Kg2 Kb3 66. Rd3+ Kb2 67. Rd2+ Kxa3 68. f5 c4 69. f6 Rf8 70. Rd6 Kb4 71. Kh3 Kc5 72. Re6 c3 73. Kxh4 c2 74. Re1 Rxf6 75. Rc1 Rf2 76. Kg3 Rd2 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.23"]
[Round "2"]
[White "Brond, Victor"]
[Black "Pilnik, Herman"]
[Result "0-1"]
[ECO "D45"]
[EventDate "1971.03.22"]
[PlyCount "112"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. Qc2 a6 7. b3 Bd6 8. Bb2 Qe7 9. Bd3 Ba3 10. Bxa3 Qxa3 11. O-O Qd6 12. c5 Qc7 13. e4 dxe4 14. Nxe4 Nxe4 15. Bxe4 Nf6 16. Rfe1 O-O 17. Rad1 Bd7 18. Ne5 Rad8 19. Re3 Bc8 20. Rh3 g6 21. Rc3 Rxd4 22. Rxd4 Qxe5 23. Rcc4 Ng4 24. g3 f5 25. Bf3 Qe1+ 26. Kg2 Ne5 27. Rd1 Qa5 28. Rcd4 Nf7 29. b4 Qc7 30. Be2 Qe7 31. Bc4 Qf6 32. h4 h6 33. Qe2 g5 34. hxg5 hxg5 35. R4d2 g4 36. f4 gxf3+ 37. Qxf3 Kg7 38. Rh1 Ne5 39. Qh5 Qg6 40. Qxg6+ Kxg6 41. Bb3 Kf6 42. Re2 Nf7 43. a4 Rg8 44. Rhe1 f4 45. Bxe6 f3+ 46. Kxf3 Ng5+ 47. Ke3 Nxe6 48. Rf2+ Ke7 49. Rg1 Rg4 50. Rb2 a5 51. b5 Nxc5 52. bxc6 bxc6 53. Rc2 Re4+ 54. Kf2 Nd3+ 55. Kf3 Rxa4 56. Ke3 Ne5 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.23"]
[Round "2"]
[White "Browne, Walter Shawn"]
[Black "Mecking, Henrique"]
[Result "1-0"]
[ECO "B50"]
[EventDate "1971.03.22"]
[PlyCount "145"]

1. e4 c5 2. Nf3 d6 3. Nc3 Nf6 4. e5 dxe5 5. Nxe5 Nbd7 6. Nc4 e6 7. d4 cxd4 8. Qxd4 Bc5 9. Nd6+ Ke7 10. Nxc8+ Rxc8 11. Qh4 Ne5 12. Be2 Qd4 13. Qg3 Neg4 14. Bxg4 Qxg4 15. Qxg4 Nxg4 16. Ne4 Bb6 17. f3 Nf6 18. Nxf6 Kxf6 19. c3 Rhd8 20. Bd2 e5 21. Ke2 Ke6 22. Rhd1 a5 23. b3 h6 24. Be1 Bc5 25. Rxd8 Rxd8 26. Rd1 Rxd1 27. Kxd1 b5 28. Ke2 f5 29. Kd3 g6 30. a4 bxa4 31. bxa4 Kd6 32. Kc4 Kc6 33. Bd2 h5 34. Bg5 e4 35. fxe4 fxe4 36. Bf4 Bb6 37. h3 Bc5 38. Be5 Bb6 39. Bd4 Bd8 40. Be5 Bb6 41. Bd4 Bd8 42. Bg7 Bb6 43. Bh6 Bc7 44. Bg5 Bb6 45. Bf6 Kd6 46. Bd4 Bd8 47. Be3 Kc6 48. Kd4 Bf6+ 49. Kxe4 Bxc3 50. Kf4 Bf6 51. Bd2 Bd8 52. Ke5 Kc5 53. Ke6 Kc4 54. Kd7 Bb6 55. Kc6 Bd8 56. Kd7 Bb6 57. Kc6 Bd8 58. Be1 h4 59. Kd7 Bb6 60. Bxh4 Kb4 61. Ke6 Kxa4 62. Kf7 Kb3 63. Kxg6 a4 64. Be7 a3 65. Bxa3 Kxa3 66. g4 Kb4 67. g5 Kc4 68. Kf7 Kd5 69. g6 Bd4 70. g7 Bxg7 71. Kxg7 Ke6 72. h4 Kf5 73. h5 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.23"]
[Round "2"]
[White "Juarez, Carlos Eleodoro"]
[Black "Polugaevsky, Lev"]
[Result "0-1"]
[ECO "B89"]
[EventDate "1971.03.22"]
[PlyCount "78"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4 e6 7. Bb3 Be7 8. Be3 a6 9. Qe2 Qc7 10. O-O-O Na5 11. g4 b5 12. g5 Nxb3+ 13. axb3 Nd7 14. h4 b4 15. Na4 Nc5 16. Nxc5 dxc5 17. Nf3 a5 18. Nd2 a4 19. bxa4 Rxa4 20. Nc4 O-O 21. b3 Ra2 22. Qf3 Ba6 23. Bf4 Qb7 24. Be5 Bxc4 25. bxc4 Qa6 26. Bb2 f6 27. g6 Qxc4 28. Rd7 Rfa8 29. gxh7+ Kh8 30. e5 R8a3 31. exf6 Rxf3 32. fxe7 Qf4+ 33. Kb1 Rxb2+ 34. Kxb2 Qe5+ 35. Kc1 Qa1+ 36. Kd2 Rxf2+ 37. Ke3 Rf3+ 38. Ke4 Qxh1 39. e8=Q+ Rf8+ 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.23"]
[Round "2"]
[White "Najdorf, Miguel"]
[Black "Gheorghiu, Florin"]
[Result "1/2-1/2"]
[ECO "B22"]
[EventDate "1971.03.22"]
[PlyCount "32"]

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 Nc6 9. Bd3 cxd4 10. exd4 Be7 11. a3 b6 12. Re1 Bb7 13. Bc2 Rc8 14. Qd3 g6 15. Bh6 Re8 16. Rad1 Nd5 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.23"]
[Round "2"]
[White "Panno, Oscar"]
[Black "Sumiacher, Carlos"]
[Result "1/2-1/2"]
[ECO "B38"]
[EventDate "1971.03.22"]
[PlyCount "124"]

1. d4 Nf6 2. c4 c5 3. Nf3 g6 4. Nc3 Bg7 5. e4 cxd4 6. Nxd4 d6 7. Be2 Nc6 8. Be3 Bd7 9. O-O O-O 10. Nb3 Na5 11. f3 a6 12. Qd2 Re8 13. Rfd1 Be6 14. Nd5 Nxb3 15. axb3 Bxd5 16. exd5 Nd7 17. b4 b6 18. Ra4 a5 19. Rda1 Rb8 20. Bf2 Qc7 21. R1a2 Rb7 22. g3 Ra8 23. bxa5 Rxa5 24. b4 Rxa4 25. Rxa4 Ra7 26. Qa2 Rxa4 27. Qxa4 Bc3 28. Kg2 Kg7 29. f4 Qb7 30. Bf3 Kg8 31. Be3 Kg7 32. Kf2 Nb8 33. Qa3 Bf6 34. Be2 Kf8 35. Ke1 Ke8 36. Kd1 Qa6 37. Qxa6 Nxa6 38. Bd2 Nb8 39. Kc2 Kd7 40. Be3 Kc7 41. Kb3 Kb7 42. h4 e5 43. f5 gxf5 44. Bh5 f4 45. Bf2 fxg3 46. Bxg3 Nd7 47. Bxf7 Nf8 48. h5 Bg5 49. Kc3 Nd7 50. Kd3 Nf6 51. Bf2 Kc7 52. c5 bxc5 53. bxc5 dxc5 54. Bxc5 Nd7 55. Bb4 Nf6 56. Kc4 Ne4 57. Kd3 Nd6 58. Be6 h6 59. Ba5+ Kb7 60. Bd7 Ka6 61. Bb4 Be7 62. Bd2 Bf8 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.23"]
[Round "2"]
[White "Planinc, Albin"]
[Black "Savon, Vladimir"]
[Result "1/2-1/2"]
[ECO "B99"]
[EventDate "1971.03.22"]
[PlyCount "94"]

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 Rb8 14. h4 b4 15. axb4 Rxb4 16. Bh3 Qc5 17. Nb3 Qb6 18. h5 Nc5 19. Nxc5 Qxc5 20. g6 fxg6 21. hxg6 h6 22. Bg4 Qa5 23. b3 Qa3+ 24. Kd2 Rd4+ 25. Ke2 Rxd1 26. Rxd1 Qc5 27. Qe3 Qc6 28. Rd3 O-O 29. Qh3 Rf6 30. f5 Qc5 31. fxe6 Qf2+ 32. Kd1 Qg1+ 33. Kd2 Rf2+ 34. Ne2 Bg5+ 35. Re3 Bxe3+ 36. Kxe3 Rxe2+ 37. Kxe2 Qc5 38. Qd3 h5 39. Bf5 Kf8 40. c4 Ke7 41. Qf3 Qe5 42. Qxh5 Qb2+ 43. Kf3 Qxb3+ 44. Kf4 Qb2 45. Qh4+ Ke8 46. Qh8+ Ke7 47. Qxc8 Qf2+ 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.23"]
[Round "2"]
[White "Poch, Caesar G."]
[Black "Rubinetti, Jorge Alberto"]
[Result "1/2-1/2"]
[ECO "E62"]
[EventDate "1971.03.22"]
[PlyCount "81"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. g3 d6 6. Bg2 c6 7. O-O a6 8. e4 b5 9. Qe2 Bg4 10. e5 Nfd7 11. Bf4 b4 12. exd6 e5 13. dxe5 bxc3 14. b4 g5 15. Qe4 gxf4 16. gxf4 Bxf3 17. Bxf3 Re8 18. b5 axb5 19. cxb5 Nxe5 20. fxe5 Rxe5 21. Qd3 Rxb5 22. Kh1 Rg5 23. Rg1 Raa5 24. Be4 h6 25. f4 Rxg1+ 26. Rxg1 Kh8 27. Qg3 Qf6 28. Qh3 Qe6 29. Qg2 Qf6 30. Qg4 Nd7 31. Qxd7 Ra8 32. Qxc6 Rd8 33. Bc2 Qxd6 34. Qxd6 Rxd6 35. Rd1 Bf8 36. Rxd6 Bxd6 37. f5 Kg7 38. Kg2 Kf6 39. h3 Ke5 40. Kf3 Kd4 41. Ke2 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.23"]
[Round "2"]
[White "Quinteros, Miguel Angel"]
[Black "Schweber, Samuel"]
[Result "1-0"]
[ECO "A07"]
[EventDate "1971.03.22"]
[PlyCount "91"]

1. Nf3 d5 2. g3 Bg4 3. Bg2 Nd7 4. d3 e6 5. Nbd2 c6 6. O-O Be7 7. Qe1 h5 8. h3 Bxf3 9. Nxf3 Ngf6 10. e4 dxe4 11. dxe4 e5 12. Bd2 Qc7 13. Qe2 Nh7 14. h4 Ndf6 15. Bh3 Ng4 16. Bxg4 hxg4 17. Nh2 Nf6 18. Bg5 O-O-O 19. Rfd1 Kb8 20. Rxd8+ Rxd8 21. Bxf6 Bxf6 22. Rd1 g6 23. Nxg4 Bg7 24. Ne3 b5 25. Rxd8+ Qxd8 26. a4 a6 27. axb5 axb5 28. h5 Bh6 29. Ng4 Qg5 30. Nxh6 Qxh6 31. Qe3 Qxe3 32. fxe3 gxh5 33. Kh2 Kc7 34. Kh3 Kd6 35. Kh4 b4 36. b3 Ke6 37. Kxh5 Ke7 38. Kh6 Kf8 39. Kg5 Ke7 40. Kf5 f6 41. g4 Kf7 42. g5 fxg5 43. Kxg5 Ke6 44. Kg6 c5 45. Kg5 c4 46. Kg6 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.24"]
[Round "3"]
[White "Gheorghiu, Florin"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]
[ECO "E60"]
[EventDate "1971.03.22"]
[PlyCount "36"]

1. c4 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 O-O 5. Bg2 d6 6. d4 Nbd7 7. Nf3 e5 8. dxe5 dxe5 9. O-O e4 10. Ng5 Re8 11. Nc3 h6 12. Nh3 c6 13. Qc2 Qe7 14. Rad1 Nf8 15. Qc1 Bg4 16. f3 Qc5+ 17. Nf2 exf3 18. exf3 Bf5 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.24"]
[Round "3"]
[White "Mecking, Henrique"]
[Black "Juarez, Carlos Eleodoro"]
[Result "1-0"]
[ECO "B48"]
[EventDate "1971.03.22"]
[PlyCount "78"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6 6. Be3 Qc7 7. Bd3 Nf6 8. O-O Ne5 9. h3 Bc5 10. Qe2 d6 11. f4 Ng6 12. Nb3 Bxe3+ 13. Qxe3 b5 14. a3 Bb7 15. Rae1 O-O 16. Kh1 Rac8 17. Nd4 Rfe8 18. e5 Nd5 19. Nxd5 Bxd5 20. exd6 Qxd6 21. Qf2 f5 22. c3 Rf8 23. Rd1 Rcd8 24. Kg1 Ne7 25. Rfe1 Rf6 26. Bf1 Ng6 27. g3 h5 28. h4 Be4 29. Be2 Qc7 30. Nf3 Rxd1 31. Rxd1 Bb7 32. Ng5 e5 33. Bxh5 Qc6 34. Bf3 e4 35. Bg2 Nf8 36. Qe2 Ne6 37. Qh5 Qb6+ 38. Kh2 Nxg5 39. hxg5 Rf8 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.24"]
[Round "3"]
[White "Pilnik, Herman"]
[Black "Quinteros, Miguel Angel"]
[Result "1/2-1/2"]
[ECO "B40"]
[EventDate "1971.03.22"]
[PlyCount "116"]

1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. g3 Qc7 5. Bg2 Nf6 6. O-O Be7 7. h3 O-O 8. d3 b5 9. Bf4 d6 10. e5 Ne8 11. exd6 Bxd6 12. Be3 Nf6 13. a4 b4 14. Ne4 Nxe4 15. dxe4 Rd8 16. Qc1 Nc6 17. Nd2 a5 18. f4 Ba6 19. Rf2 Bf8 20. Bf1 Bb7 21. c3 Rac8 22. Nf3 Qb8 23. Rd2 Nd4 24. Nxd4 cxd4 25. Rxd4 Rxd4 26. Bxd4 Bxe4 27. Qe3 Ba8 28. Rd1 bxc3 29. bxc3 Qb3 30. Rd2 Qxa4 31. Qd3 Rd8 32. Qb5 Qxb5 33. Bxb5 Bc5 34. Ra2 Bxd4+ 35. cxd4 Rxd4 36. Rxa5 Bd5 37. Be2 g6 38. Kf2 h5 39. h4 Rd2 40. Rc5 Kg7 41. Rc1 Rb2 42. Ke3 Rb7 43. Rd1 Kf6 44. Bd3 Rb3 45. Rc1 e5 46. fxe5+ Kxe5 47. Rc5 Ra3 48. Rb5 f5 49. Kd2 Kd4 50. Rb4+ Kc5 51. Rb5+ Kc6 52. Rb4 Ra2+ 53. Ke3 Rg2 54. Kf4 Rf2+ 55. Ke5 Rf3 56. Rd4 Bb3 57. Bb1 Rxg3 58. Rd3 Rxd3 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.24"]
[Round "3"]
[White "Polugaevsky, Lev"]
[Black "Brond, Victor"]
[Result "1-0"]
[ECO "B38"]
[EventDate "1971.03.22"]
[PlyCount "81"]

1. c4 g6 2. e4 Bg7 3. d4 d6 4. Nc3 Nf6 5. Be2 O-O 6. Nf3 c5 7. O-O cxd4 8. Nxd4 Nc6 9. Be3 Nd7 10. Qd2 Nc5 11. Rfd1 Be6 12. Rab1 a5 13. Ndb5 a4 14. f3 Nb4 15. Nd4 Qa5 16. Bf1 Rfc8 17. Kh1 Nd7 18. b3 axb3 19. axb3 Nc6 20. Ndb5 Nf6 21. Rdc1 Ne5 22. Qf2 Qd8 23. Bb6 Qd7 24. Na7 Rf8 25. Nd5 Nh5 26. Qh4 Kh8 27. Bg1 Rae8 28. Nb5 f5 29. Nbc7 Rc8 30. Nxe6 Qxe6 31. exf5 Rxf5 32. g4 Nxg4 33. Qxg4 Qf7 34. Ne3 Nf6 35. Qh3 Rfc5 36. Nd5 R5c6 37. Nf4 g5 38. Ne2 Ra8 39. Nd4 Rca6 40. Nf5 Bf8 41. Bd4 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.24"]
[Round "3"]
[White "Rubinetti, Jorge Alberto"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "E49"]
[EventDate "1971.03.22"]
[PlyCount "110"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nge2 d5 7. cxd5 exd5 8. a3 Bxc3+ 9. bxc3 O-O 10. O-O Re8 11. f3 Bd7 12. Ng3 Qc7 13. Ra2 h6 14. Re2 Re7 15. Ree1 Rae8 16. Qd2 Qa5 17. Qb2 h5 18. Bb1 Qa4 19. Qf2 Qb3 20. Bc2 Qc4 21. Nf5 Bxf5 22. Bxf5 Nh7 23. Bb2 Nf8 24. Bb1 Ne6 25. Qd2 Rd8 26. Bd3 Qb3 27. Rb1 Qa4 28. Bc1 a6 29. Qb2 Na5 30. Qc2 Qc6 31. a4 Rc7 32. Qa2 Qd7 33. Re1 Rdc8 34. Bd2 cxd4 35. cxd4 Nc4 36. a5 h4 37. Bb4 h3 38. g3 g6 39. Qf2 Qa4 40. Bxc4 Rxc4 41. Bd2 Rc2 42. Red1 Ng5 43. Qe2 Qxa5 44. Kf2 Qc7 45. Rbc1 Qd7 46. Rxc2 Rxc2 47. Qd3 Qc6 48. Ke2 b5 49. Ra1 Rb2 50. Ra3 Qf6 51. e4 dxe4 52. fxe4 Qe6 53. Ke3 Qg4 54. d5 b4 55. Rxa6 Rb3 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.24"]
[Round "3"]
[White "Savon, Vladimir"]
[Black "Browne, Walter Shawn"]
[Result "1/2-1/2"]
[ECO "A38"]
[EventDate "1971.03.22"]
[PlyCount "128"]

1. c4 c5 2. Nf3 g6 3. g3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Nc2 d6 7. Bg2 Nf6 8. Nc3 Nd7 9. Bd2 a5 10. O-O Nc5 11. Rb1 O-O 12. Ne3 Bd7 13. Ned5 e6 14. Ne3 Nd4 15. Nc2 Nxc2 16. Qxc2 Bc6 17. Rfd1 Bxg2 18. Kxg2 Qd7 19. Be3 Qc6+ 20. Kg1 Rfd8 21. Bd4 d5 22. Bxg7 Kxg7 23. Rd4 dxc4 24. Rxc4 Qb6 25. b4 axb4 26. Rbxb4 Qd6 27. Rb5 b6 28. Qb2 Qd2 29. Rxb6 Qxb2 30. Rxb2 Nd7 31. Rc7 Rdc8 32. Rxc8 Rxc8 33. Ne4 Rc1+ 34. Kg2 Nf6 35. Nd6 Rd1 36. Nc4 Nd5 37. Rb7 Nc3 38. Ne5 Nxe2 39. Rxf7+ Kg8 40. Rd7 Ra1 41. Ra7 Nc3 42. a3 Ra2 43. Kf3 Nd1 44. Ra8+ Kg7 45. Ra7+ Kg8 46. Ng4 h5 47. Nf6+ Kf8 48. Ne4 g5 49. h3 g4+ 50. hxg4 hxg4+ 51. Kf4 Nxf2 52. Nc5 Re2 53. a4 e5+ 54. Kf5 Re3 55. Ne6+ Ke8 56. a5 Rxg3 57. a6 Rf3+ 58. Kxe5 Ra3 59. Nf4 g3 60. Ke6 Re3+ 61. Kd6 Ne4+ 62. Ke5 Nc3+ 63. Kf5 Nb5 64. Rg7 Ra3 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.24"]
[Round "3"]
[White "Schweber, Samuel"]
[Black "Poch, Caesar G."]
[Result "1-0"]
[ECO "C19"]
[EventDate "1971.03.22"]
[PlyCount "116"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qc7 7. Nf3 Ne7 8. a4 b6 9. Bb5+ Bd7 10. Be2 Nbc6 11. O-O O-O 12. Re1 f6 13. exf6 gxf6 14. Bh6 Rf7 15. Nh4 Ng6 16. Bh5 Nce7 17. Qd3 c4 18. Qh3 Re8 19. f4 e5 20. f5 Nxh4 21. Qxh4 Bxf5 22. Bxf7+ Kxf7 23. dxe5 fxe5 24. Qh5+ Bg6 25. Qxe5 Qxe5 26. Rxe5 Bxc2 27. Bg5 Nf5 28. Rxe8 Kxe8 29. a5 b5 30. a6 Kd7 31. g4 Nd6 32. Be3 b4 33. cxb4 Nb5 34. Bc5 c3 35. Rc1 Be4 36. Bxa7 Nxa7 37. Rxc3 Kd6 38. Kf2 d4 39. Rc4 Nb5 40. Rc5 Na7 41. Rc4 Nb5 42. Rc8 Kd7 43. Rc5 Na7 44. Rc4 Nb5 45. h4 Bd3 46. Rc5 Na7 47. g5 Kd6 48. h5 Be4 49. g6 hxg6 50. h6 g5 51. Rxg5 Kc6 52. Re5 Bd3 53. Ke1 Kb6 54. Kd2 Bb1 55. b5 Nc8 56. Re8 Kc7 57. Re6 Kd7 58. Rf6 Ke7 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.24"]
[Round "3"]
[White "Sumiacher, Carlos"]
[Black "Planinc, Albin"]
[Result "0-1"]
[ECO "A20"]
[EventDate "1971.03.22"]
[PlyCount "48"]

1. c4 Nf6 2. g3 e5 3. Bg2 c6 4. Nf3 e4 5. Nd4 d5 6. cxd5 Qxd5 7. e3 c5 8. Nc3 Qe5 9. Nde2 Nc6 10. d3 exd3 11. Nf4 c4 12. Qa4 Qc5 13. b3 g5 14. Ba3 Qxa3 15. Bxc6+ Kd8 16. Qxc4 d2+ 17. Kxd2 Qb2+ 18. Kd3 bxc6 19. Qxc6 Nd7 20. Rhd1 Rb8 21. Nb5 Bb7 22. Qc7+ Ke8 23. Rd2 Ne5+ 24. Ke2 Bf3+ 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.26"]
[Round "4"]
[White "Brond, Victor"]
[Black "Mecking, Henrique"]
[Result "0-1"]
[ECO "A48"]
[EventDate "1971.03.22"]
[PlyCount "88"]

1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 O-O 5. e4 d6 6. c3 b6 7. Bd3 Bb7 8. O-O c5 9. dxc5 bxc5 10. Qe2 Nc6 11. Rad1 Nd7 12. Nc4 Qc7 13. Rfe1 Nb6 14. Qd2 Ba6 15. Ne3 Bxd3 16. Qxd3 Rab8 17. Nd5 Qb7 18. Rd2 Rfe8 19. h4 Nd7 20. h5 e6 21. hxg6 hxg6 22. Ne3 Nce5 23. Nxe5 Nxe5 24. Qb1 c4 25. Red1 f5 26. exf5 gxf5 27. f4 Nf7 28. Nxc4 d5 29. Ne3 Nxg5 30. fxg5 Qb6 31. Re2 f4 32. Qg6 fxe3 33. Qh5 Rf8 34. g6 Rf2 35. Rde1 Rxe2 36. Rxe2 e5 37. g3 Qf6 38. Rxe3 Qb6 39. Qf3 e4 40. Qf4 Rd8 41. Qg5 d4 42. cxd4 Bxd4 43. Kg2 Bxe3 44. Qe7 Rd2+ 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.26"]
[Round "4"]
[White "Browne, Walter Shawn"]
[Black "Juarez, Carlos Eleodoro"]
[Result "1-0"]
[ECO "B40"]
[EventDate "1971.03.22"]
[PlyCount "63"]

1. e4 c5 2. Nf3 d6 3. Nc3 a6 4. g3 b5 5. Bg2 Bb7 6. d3 e6 7. O-O Be7 8. e5 dxe5 9. Nxe5 Bxg2 10. Kxg2 Nf6 11. Qf3 Ra7 12. a4 b4 13. Ne4 O-O 14. Re1 Rc7 15. b3 Nxe4 16. Rxe4 Bf6 17. Bb2 Qd5 18. Rb1 Qb7 19. Rc4 Qc8 20. Rf4 Bxe5 21. Bxe5 Nd7 22. Bxc7 Qxc7 23. Re1 e5 24. Rfe4 f5 25. R4e2 Kh8 26. Qd5 f4 27. gxf4 Rxf4 28. Rxe5 Nf8 29. R1e4 Rf6 30. Rf5 Rg6+ 31. Kh1 Qc8 32. Qf7 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.26"]
[Round "4"]
[White "Najdorf, Miguel"]
[Black "Schweber, Samuel"]
[Result "1/2-1/2"]
[ECO "E95"]
[EventDate "1971.03.22"]
[PlyCount "47"]

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. Rb1 Ng4 10. d5 c5 11. a3 f6 12. b4 Nh6 13. Nd2 f5 14. Nb3 b6 15. bxc5 bxc5 16. Bd2 Nf6 17. Bd3 Nfg4 18. f3 Qh4 19. fxg4 Nxg4 20. h3 Qf2+ 21. Kh1 Qg3 22. hxg4 Qh4+ 23. Kg1 fxg4 24. Ne2 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.26"]
[Round "4"]
[White "Panno, Oscar"]
[Black "Rubinetti, Jorge Alberto"]
[Result "0-1"]
[ECO "A00"]
[EventDate "1971.03.22"]
[PlyCount "74"]

1. c4 e5 2. Nc3 d6 3. Nf3 f5 4. e3 Nf6 5. Be2 c6 6. b4 Be7 7. Bb2 O-O 8. O-O Kh8 9. b5 e4 10. Ng5 Qe8 11. d3 h6 12. Nh3 Nbd7 13. Nf4 Ne5 14. dxe4 fxe4 15. bxc6 bxc6 16. c5 Rb8 17. cxd6 Rxb2 18. dxe7 Qxe7 19. Qd4 Bf5 20. Nxe4 Rb5 21. Qd6 Qxd6 22. Nxd6 Bh7 23. Rfd1 Rfb8 24. f3 g5 25. Nd3 Bxd3 26. Bxd3 Nd5 27. Nf5 Nc3 28. Bc2 Nxd1 29. Rxd1 Rb2 30. Bb3 c5 31. Rd5 c4 32. Rxe5 cxb3 33. axb3 R2xb3 34. Nxh6 Ra3 35. Nf7+ Kg7 36. Nxg5 Ra2 37. Ne4 Rb1# 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.26"]
[Round "4"]
[White "Planinc, Albin"]
[Black "Gheorghiu, Florin"]
[Result "1/2-1/2"]
[ECO "B47"]
[EventDate "1971.03.22"]
[PlyCount "40"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. f4 a6 7. Nxc6 Qxc6 8. Bd3 b5 9. Qe2 Bb7 10. Bd2 Ne7 11. a4 b4 12. Na2 a5 13. c3 bxc3 14. Nxc3 Ng6 15. O-O Bc5+ 16. Kh1 O-O 17. Rac1 f6 18. Nb5 Qb6 19. Rc2 Kh8 20. Rfc1 d6 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.26"]
[Round "4"]
[White "Poch, Caesar G."]
[Black "Pilnik, Herman"]
[Result "1/2-1/2"]
[ECO "A13"]
[EventDate "1971.03.22"]
[PlyCount "113"]

1. Nf3 d5 2. c4 e6 3. g3 dxc4 4. Qa4+ Qd7 5. Qxc4 Qc6 6. b3 Nf6 7. Bg2 Qxc4 8. bxc4 Nc6 9. Bb2 Bd7 10. O-O O-O-O 11. d3 Be8 12. Nbd2 Nd7 13. Nb3 Rg8 14. a4 Nc5 15. Nxc5 Bxc5 16. a5 Nd4 17. Nxd4 Bxd4 18. Rfb1 Bxb2 19. Rxb2 Bc6 20. Bxc6 bxc6 21. a6 Kd7 22. Rb7 Ra8 23. Kg2 Rgd8 24. Kf3 Kd6 25. Ke3 c5 26. Ra5 Rdb8 27. g4 h6 28. Ke4 f5+ 29. gxf5 exf5+ 30. Kf3 Re8 31. Ra1 g5 32. e3 Re6 33. Ra5 f4 34. e4 Re5 35. Rb1 Rd8 36. Rb7 Ra8 37. Rab5 Re6 38. Kg4 Kc6 39. Ra5 Rd6 40. Rbb5 Rxd3 41. Rxc5+ Kd7 42. Rd5+ Rxd5 43. Rxd5+ Ke6 44. Rc5 Kd6 45. Rb5 c6 46. Rb7 Ke5 47. f3 Rd8 48. Rxa7 Rd2 49. Re7+ Kf6 50. a7 h5+ 51. Kh3 Ra2 52. Rh7 Kg6 53. Rc7 Ra3 54. Rxc6+ Kg7 55. Rc7+ Kg6 56. c5 g4+ 57. Kh4 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.26"]
[Round "4"]
[White "Quinteros, Miguel Angel"]
[Black "Polugaevsky, Lev"]
[Result "0-1"]
[ECO "A07"]
[EventDate "1971.03.22"]
[PlyCount "71"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 c6 4. b3 Bf5 5. Bb2 e6 6. O-O h6 7. d3 Be7 8. Nfd2 O-O 9. e4 Bh7 10. Qe2 a5 11. a4 Na6 12. e5 Nd7 13. f4 b5 14. Nc3 Nb4 15. Nf3 Nc5 16. axb5 cxb5 17. d4 Nxc2 18. dxc5 Bxc5+ 19. Kh1 d4 20. Nxb5 d3 21. Qd2 Rb8 22. Nd6 Nxa1 23. Rxa1 Rxb3 24. Nd4 Rb6 25. Bc3 Bxd6 26. exd6 Qxd6 27. h4 e5 28. fxe5 Qxe5 29. Kh2 Rg6 30. Qf2 Qc5 31. Qd2 Rg4 32. Rxa5 Qc7 33. Qe1 d2 34. Qxd2 Qxg3+ 35. Kg1 Be4 36. Ra2 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.26"]
[Round "4"]
[White "Savon, Vladimir"]
[Black "Sumiacher, Carlos"]
[Result "1-0"]
[ECO "A26"]
[EventDate "1971.03.22"]
[PlyCount "39"]

1. Nf3 g6 2. g3 Bg7 3. Bg2 Nf6 4. O-O O-O 5. c4 d6 6. Nc3 e5 7. d3 Nc6 8. Rb1 Nh5 9. b4 f5 10. b5 Ne7 11. Qb3 h6 12. c5+ d5 13. e4 c6 14. bxc6 bxc6 15. exd5 cxd5 16. Re1 Kh7 17. Nxe5 f4 18. Nxd5 fxg3 19. hxg3 Nf5 20. Bb2 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.27"]
[Round "5"]
[White "Gheorghiu, Florin"]
[Black "Savon, Vladimir"]
[Result "1/2-1/2"]
[ECO "A05"]
[EventDate "1971.03.22"]
[PlyCount "54"]

1. Nf3 Nf6 2. g3 g6 3. b3 d5 4. Bb2 c5 5. c4 dxc4 6. bxc4 Bg7 7. Bg2 O-O 8. O-O Nc6 9. d3 Rb8 10. Ne5 Na5 11. Bc3 Nd7 12. Nxd7 Bxd7 13. Bxg7 Kxg7 14. Nd2 b6 15. Nb3 Nc6 16. e3 e5 17. Qd2 Qf6 18. f4 Rbe8 19. fxe5 Qxe5 20. Rae1 Re7 21. d4 Qd6 22. Qc3 f6 23. dxc5 bxc5 24. Rd1 Qe5 25. Qxe5 Nxe5 26. Nxc5 Bg4 27. Rd4 Be2 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.27"]
[Round "5"]
[White "Juarez, Carlos Eleodoro"]
[Black "Brond, Victor"]
[Result "0-1"]
[ECO "B48"]
[EventDate "1971.03.22"]
[PlyCount "76"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 Nf6 7. Bd3 a6 8. O-O Bd6 9. Nxc6 bxc6 10. f4 e5 11. g3 h5 12. Qf3 Ng4 13. fxe5 Nxe5 14. Qf2 Be7 15. Ne2 d6 16. Bd4 Bf6 17. Kh1 Bh3 18. Rfe1 h4 19. Bxe5 Bxe5 20. c3 hxg3 21. Nxg3 Be6 22. Re2 Rh3 23. Kg1 Ke7 24. Re3 Rah8 25. Bf1 Rxh2 26. Bg2 g6 27. b3 Kf8 28. Ne2 Bh3 29. Rxh3 R8xh3 30. Nf4 Bxf4 31. Qxf4 Qa7+ 32. Kf1 Rh1+ 33. Ke2 Rxa1 34. Bxh3 Rxa2+ 35. Kd3 Qe7 36. Bf1 Kg7 37. Qe3 Qe5 38. Be2 Qb5+ 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.27"]
[Round "5"]
[White "Mecking, Henrique"]
[Black "Quinteros, Miguel Angel"]
[Result "1-0"]
[ECO "B27"]
[EventDate "1971.03.22"]
[PlyCount "47"]

1. e4 c5 2. Nf3 Qc7 3. c4 d6 4. d4 Bg4 5. d5 e5 6. Nc3 g6 7. Be2 Bxf3 8. Bxf3 Bh6 9. Bxh6 Nxh6 10. h4 Ng8 11. h5 g5 12. Bg4 Nd7 13. Nb5 Qb6 14. Bxd7+ Kxd7 15. Qg4+ Ke7 16. Qxg5+ Nf6 17. Rh3 Rag8 18. Qf5 a6 19. Rf3 Nxe4 20. Qxe4 axb5 21. Qh4+ Ke8 22. Qf6 bxc4 23. Qxf7+ Kd8 24. Ra3 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.27"]
[Round "5"]
[White "Pilnik, Herman"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "B92"]
[EventDate "1971.03.22"]
[PlyCount "30"]

1. e4 c5 2. Nf3 d6 3. Nc3 Nf6 4. d4 cxd4 5. Nxd4 a6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. Be3 Be6 10. f3 Nbd7 11. a4 b6 12. Rf2 Qc7 13. Bf1 h6 14. Rd2 Rfb8 15. Nc1 Nc5 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.27"]
[Round "5"]
[White "Polugaevsky, Lev"]
[Black "Poch, Caesar G."]
[Result "1-0"]
[ECO "A11"]
[EventDate "1971.03.22"]
[PlyCount "75"]

1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 d5 5. c4 c6 6. Bg2 O-O 7. O-O a5 8. d3 a4 9. Nbd2 axb3 10. axb3 Rxa1 11. Qxa1 Qb6 12. Qa3 Na6 13. Bd4 Qb4 14. Qxb4 Nxb4 15. Bc5 Na6 16. Bxe7 Re8 17. Bxf6 Bxf6 18. e3 Nb4 19. d4 g5 20. h3 h5 21. Ra1 g4 22. hxg4 hxg4 23. Nh2 Bg5 24. Nhf1 Be6 25. Ra4 Be7 26. Ra7 Rb8 27. Nh2 Na6 28. c5 Nc7 29. Bf1 Bc8 30. Be2 f5 31. b4 Ra8 32. Rxa8 Nxa8 33. b5 b6 34. Nb3 bxc5 35. dxc5 cxb5 36. Bxb5 Nc7 37. Bd3 Bd7 38. c6 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.27"]
[Round "5"]
[White "Rubinetti, Jorge Alberto"]
[Black "Planinc, Albin"]
[Result "0-1"]
[ECO "C02"]
[EventDate "1971.03.22"]
[PlyCount "60"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3 cxd4 7. cxd4 Bd7 8. Nc3 Nxd4 9. Nxd4 Qxd4 10. O-O a6 11. Qe2 Ne7 12. Rd1 Qa7 13. Bf4 Nc6 14. Rac1 g6 15. h4 Bg7 16. h5 O-O 17. Bb1 Rac8 18. Rd3 d4 19. Ne4 Nxe5 20. Rxc8 Rxc8 21. Rh3 Bb5 22. Qd1 Qb6 23. Ng5 h6 24. hxg6 hxg5 25. Bxe5 Bxe5 26. f4 Bxf4 27. gxf7+ Kxf7 28. Rh7+ Kf6 29. Rh6+ Ke7 30. Rh7+ Kd6 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.27"]
[Round "5"]
[White "Schweber, Samuel"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "C00"]
[EventDate "1971.03.22"]
[PlyCount "78"]

1. e4 c5 2. Nf3 e6 3. d3 Nc6 4. g3 Nf6 5. Bg2 d5 6. Nbd2 Be7 7. O-O Qc7 8. Re1 b6 9. c3 O-O 10. e5 Nd7 11. Qe2 Ba6 12. Nf1 d4 13. c4 b5 14. b3 bxc4 15. bxc4 Rab8 16. Bf4 Rb6 17. h4 Rfb8 18. Ng5 Bxg5 19. hxg5 Bb7 20. Rab1 Nb4 21. Bxb7 Qxb7 22. Rb3 Qa6 23. Ra1 Qa4 24. Qd1 Nc6 25. Rxb6 Nxb6 26. Qf3 Nd7 27. Nh2 Ne7 28. Qe2 Qb4 29. Rd1 Ng6 30. Nf3 Qb2 31. Qe4 Qxa2 32. Kg2 Qb3 33. Ra1 Qb7 34. Qe2 a6 35. Ra2 Qc6 36. Kh2 Rb6 37. Nd2 Qb7 38. Nf3 Rb1 39. Nd2 Rh1# 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.27"]
[Round "5"]
[White "Sumiacher, Carlos"]
[Black "Browne, Walter Shawn"]
[Result "1/2-1/2"]
[ECO "A36"]
[EventDate "1971.03.22"]
[PlyCount "105"]

1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. e3 d6 6. Nge2 h5 7. h3 e5 8. d3 Nge7 9. O-O O-O 10. a3 Rb8 11. Rb1 a6 12. b4 cxb4 13. axb4 b5 14. cxb5 axb5 15. Nd5 Nxd5 16. Bxd5 Ne7 17. Bg2 Be6 18. Bb2 h4 19. g4 f5 20. gxf5 Rxf5 21. Qd2 Qd7 22. Kh2 Rbf8 23. f4 Bh6 24. Rf2 Kh7 25. Rbf1 R5f7 26. d4 e4 27. d5 Bxd5 28. Nc3 Qb7 29. Rd1 Bc6 30. Qxd6 Nf5 31. Qd2 Rd7 32. Qc1 Rxd1 33. Nxd1 Bd5 34. Nc3 Bc6 35. Ne2 Bd5 36. Nd4 Nxd4 37. Bxd4 Bc4 38. Qc2 Re8 39. Bf6 Qf7 40. Bd4 Bd3 41. Qa2 Qxa2 42. Rxa2 Bf8 43. Ra7+ Kg8 44. Ra6 Bxb4 45. Rxg6+ Kh7 46. f5 Be1 47. Rg7+ Kh6 48. Bf6 Bg3+ 49. Kg1 Rc8 50. Rg6+ Kh5 51. Rg5+ Kh6 52. Rg6+ Kh7 53. Rg7+ 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.28"]
[Round "6"]
[White "Browne, Walter Shawn"]
[Black "Brond, Victor"]
[Result "1-0"]
[ECO "B47"]
[EventDate "1971.03.22"]
[PlyCount "77"]

1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. d4 cxd4 5. Nxd4 Qc7 6. g3 Nc6 7. Bg2 d6 8. O-O Bd7 9. Re1 Be7 10. Nxc6 Bxc6 11. a4 b6 12. Qg4 h5 13. Qe2 Nf6 14. Bf4 Qb7 15. Rad1 Rd8 16. Nd5 e5 17. Nxe7 Kxe7 18. Bg5 Bxa4 19. f4 Qc8 20. b3 Bb5 21. c4 Qc5+ 22. Kh1 Bc6 23. Rf1 a5 24. Rd3 Kf8 25. Qd1 exf4 26. gxf4 Re8 27. Bxf6 gxf6 28. Rxd6 Rg8 29. Rxf6 Rxg2 30. Kxg2 Bxe4+ 31. Kh3 Ke7 32. Qa1 Qe3+ 33. Kh4 Kf8 34. Rg1 Qf2+ 35. Kg5 Bh7 36. Kh6 Qc2 37. Rxf7+ Kxf7 38. Rg7+ Ke6 39. Qe5# 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.28"]
[Round "6"]
[White "Najdorf, Miguel"]
[Black "Polugaevsky, Lev"]
[Result "0-1"]
[ECO "D27"]
[EventDate "1971.03.22"]
[PlyCount "74"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d5 7. O-O dxc4 8. Bxc4 Nc6 9. Bd3 cxd4 10. exd4 Be7 11. a3 a6 12. Bc2 b5 13. Qd3 Bb7 14. Re1 g6 15. Bb3 Rc8 16. Bh6 Re8 17. Ba2 b4 18. Ne2 Na5 19. Nf4 b3 20. Bxb3 Be4 21. Qd1 Nxb3 22. Qxb3 Bc2 23. Qa2 Ng4 24. Nxe6 Qb6 25. Ng7 Bb3 26. Qb1 Red8 27. Nf5 gxf5 28. Rxe7 Nxh6 29. Qd3 Qf6 30. Ra7 Bc4 31. Qd2 Bd5 32. Ne5 Ng4 33. Qf4 Nxe5 34. dxe5 Qg6 35. g3 Be4 36. Re1 Rd3 37. e6 Qxe6 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.28"]
[Round "6"]
[White "Panno, Oscar"]
[Black "Pilnik, Herman"]
[Result "1-0"]
[ECO "D63"]
[EventDate "1971.03.22"]
[PlyCount "111"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 Nbd7 6. Nf3 O-O 7. Rc1 c6 8. Bd3 Re8 9. O-O Nf8 10. a3 Ng6 11. b4 a6 12. Qb3 dxc4 13. Bxc4 h6 14. Bxf6 gxf6 15. Bd3 f5 16. Na4 Bd6 17. g3 Qf6 18. Nb6 Rb8 19. e4 fxe4 20. Bxe4 Bc7 21. Nc4 Rd8 22. Rfe1 Kg7 23. Bxg6 fxg6 24. Re4 Rf8 25. Ncd2 Bd7 26. Qe3 Rbd8 27. Rc5 b6 28. Rc3 c5 29. bxc5 b5 30. c6 Bc8 31. Ne5 Ba5 32. Rc2 Rd5 33. Rf4 Qe7 34. Rxf8 Qxf8 35. Ndf3 Qf5 36. Rc1 g5 37. g4 Qf6 38. h3 Bb6 39. Re1 Rd8 40. Kg2 Rd5 41. Qe4 Bc7 42. Rh1 Rd8 43. h4 gxh4 44. Rxh4 Bxe5 45. Nxe5 Rf8 46. Kh3 Rh8 47. Kg3 Kg8 48. f4 a5 49. Rh1 b4 50. axb4 axb4 51. Rb1 h5 52. g5 h4+ 53. Kh2 Qf5 54. Qxf5 exf5 55. d5 Kg7 56. d6 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.28"]
[Round "6"]
[White "Planinc, Albin"]
[Black "Schweber, Samuel"]
[Result "1/2-1/2"]
[ECO "B47"]
[EventDate "1971.03.22"]
[PlyCount "72"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. f4 a6 7. Nxc6 Qxc6 8. Bd3 b5 9. Qe2 Bb7 10. Bd2 Ne7 11. a3 Ng6 12. O-O Bc5+ 13. Kh1 O-O 14. e5 d5 15. exd6 Bxd6 16. Be4 Qc7 17. Bxb7 Qxb7 18. Ne4 Be7 19. f5 exf5 20. Rxf5 Nh4 21. Re5 Ng6 22. Rh5 Rae8 23. Qf3 Qc6 24. Bc3 f5 25. Rxh7 Rf7 26. Re1 Bf8 27. Ng5 Rxe1+ 28. Bxe1 Qxf3 29. gxf3 Re7 30. Bc3 Re2 31. Rh5 Rxc2 32. Nh3 Bxa3 33. Rg5 Kh7 34. Rh5+ Kg8 35. Rg5 Kh7 36. Rh5+ Kg8 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.28"]
[Round "6"]
[White "Poch, Caesar G."]
[Black "Mecking, Henrique"]
[Result "1/2-1/2"]
[ECO "A17"]
[EventDate "1971.03.22"]
[PlyCount "113"]

1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O Be7 6. Nc3 O-O 7. d3 d5 8. cxd5 Nxd5 9. e4 Nxc3 10. bxc3 Ba6 11. c4 c5 12. Bb2 Nc6 13. Qe2 Qd7 14. Rfd1 Rfd8 15. Ne1 Nd4 16. Bxd4 Qxd4 17. e5 Rab8 18. Be4 b5 19. Nf3 Qc3 20. Rac1 Qa3 21. Nd2 b4 22. Qf3 Qb2 23. Qe2 g6 24. f4 Bb7 25. Kf1 Bxe4 26. Nxe4 Qd4 27. Qf2 a5 28. Qxd4 Rxd4 29. Ke2 a4 30. g4 h6 31. h4 Bxh4 32. Rh1 g5 33. Nxc5 Rxf4 34. Ne4 Kg7 35. Rhg1 h5 36. gxh5 g4 37. c5 Bd8 38. Rcf1 Rxf1 39. Rxg4+ Kh6 40. Kxf1 b3 41. axb3 axb3 42. Nc3 b2 43. Nb1 Bc7 44. Re4 Kxh5 45. Ke2 Rg8 46. Kd1 Rg4 47. Rxg4 Kxg4 48. d4 Kf3 49. Kc2 Ke3 50. Nc3 Kxd4 51. Nb5+ Kxc5 52. Nxc7 Kd4 53. Kxb2 Kxe5 54. Kc2 Ke4 55. Kd2 Kf3 56. Ne8 e5 57. Nf6 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.28"]
[Round "6"]
[White "Quinteros, Miguel Angel"]
[Black "Juarez, Carlos Eleodoro"]
[Result "1/2-1/2"]
[ECO "A39"]
[EventDate "1971.03.22"]
[PlyCount "113"]

1. Nf3 c5 2. c4 Nf6 3. Nc3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. g3 O-O 7. Bg2 Nc6 8. O-O a6 9. e3 Qc7 10. b3 d6 11. Bb2 Bd7 12. Rc1 Nxd4 13. exd4 e6 14. Kh1 Rab8 15. a4 Rfc8 16. Ba3 Be8 17. d5 e5 18. f4 exf4 19. Rxf4 Qd8 20. Qf1 Nh5 21. Rf3 f5 22. Re1 b5 23. axb5 axb5 24. Nxb5 Bxb5 25. cxb5 Be5 26. Rb1 Rc2 27. Rc1 Rxc1 28. Bxc1 Qd7 29. b4 Rxb5 30. Bd2 Nf6 31. Rd3 Rb8 32. Rb3 Qa7 33. Be3 Qa2 34. Qb1 Qe2 35. Bg1 Qh5 36. Bf3 Qh3 37. b5 Ra8 38. b6 Ra1 39. b7 Nd7 40. b8=Q+ Nxb8 41. Rxb8+ Kg7 42. Qd3 Bxg3 43. Rb1 Bxh2 44. Bxh2 Rxb1+ 45. Qxb1 Qxf3+ 46. Kg1 Qxd5 47. Qa1+ Kf7 48. Qa7+ Kf6 49. Qxh7 Qd1+ 50. Kg2 Qe2+ 51. Kg1 Qe3+ 52. Kg2 Qe4+ 53. Kf2 f4 54. Qh8+ Kf5 55. Qc8+ Ke5 56. Qe8+ Kf5 57. Qd7+ 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.28"]
[Round "6"]
[White "Savon, Vladimir"]
[Black "Rubinetti, Jorge Alberto"]
[Result "1/2-1/2"]
[ECO "C01"]
[EventDate "1971.03.22"]
[PlyCount "112"]

1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. e4 Nc6 5. Be2 d5 6. exd5 exd5 7. d4 Be7 8. O-O O-O 9. Be3 cxd4 10. Nxd4 Nxd4 11. Bxd4 dxc4 12. Bxc4 Bd7 13. Qb3 Bc6 14. Rad1 Qa5 15. Rfe1 Qb4 16. Qxb4 Bxb4 17. a3 Bxc3 18. Bxc3 Rfe8 19. Rxe8+ Rxe8 20. f3 Nd7 21. Kf2 Nb6 22. Ba2 Na4 23. Bd4 Rd8 24. Bb3 h6 25. h4 b6 26. Bc2 Nc5 27. Bc3 Rxd1 28. Bxd1 Kf8 29. b4 Nd7 30. Bb3 f6 31. Ke3 Ke7 32. Kf4 Nf8 33. h5 Be8 34. g4 Bc6 35. a4 Ne6+ 36. Ke3 b5 37. a5 a6 38. Bc2 Kd6 39. Be4 Bd5 40. Bd4 Bxe4 41. Kxe4 Ng5+ 42. Ke3 Kd5 43. f4 Ne6 44. Ba1 Nc7 45. Bd4 Ne6 46. Bb2 Nc7 47. Kd3 Ne6 48. Bc1 Nd4 49. Bd2 Ne6 50. Be3 Nc7 51. Bb6 Ne6 52. Ke3 Kc4 53. f5 Nf8 54. Bc5 Nd7 55. Bd6 Kd5 56. Be7 Ke5 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.28"]
[Round "6"]
[White "Sumiacher, Carlos"]
[Black "Gheorghiu, Florin"]
[Result "1/2-1/2"]
[ECO "A25"]
[EventDate "1971.03.22"]
[PlyCount "57"]

1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Nge7 7. Rb1 Be6 8. Nd5 f5 9. d3 O-O 10. b4 Qd7 11. b5 Nd8 12. O-O Nc8 13. Qb3 c6 14. bxc6 bxc6 15. Ndc3 Nb6 16. Qc2 Nb7 17. f4 e4 18. dxe4 Bxc4 19. Rd1 fxe4 20. Nxe4 d5 21. Ng5 Nd6 22. e4 h6 23. Bh3 Qe7 24. Ne6 Nxe4 25. Nxg7 Bxe2 26. Qxe2 Kxg7 27. Bb2+ Kh7 28. Rbc1 c5 29. Ba3 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.30"]
[Round "7"]
[White "Brond, Victor"]
[Black "Quinteros, Miguel Angel"]
[Result "0-1"]
[ECO "E62"]
[EventDate "1971.03.22"]
[PlyCount "80"]

1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. Nf3 Nf6 5. g3 O-O 6. Bg2 c6 7. O-O Qa5 8. d5 Qb4 9. Nd2 Bd7 10. e4 a5 11. a3 Qb6 12. Rb1 Na6 13. Nf3 e5 14. dxe6 Bxe6 15. Be3 Qc7 16. b3 Rfe8 17. Qd2 Ng4 18. Bd4 Bh6 19. Qc2 Ne5 20. Nd2 Bg7 21. Rbd1 f5 22. h3 Nc5 23. f4 Ned3 24. Bxg7 Qxg7 25. Kh2 Rad8 26. Nf3 fxe4 27. Nxe4 Bf5 28. Nxc5 Nxc5 29. Qa2 Qc3 30. Nd4 Re3 31. Qf2 Ne4 32. Bxe4 Bxe4 33. Rfe1 Rxe1 34. Rxe1 d5 35. cxd5 Bxd5 36. f5 Rf8 37. b4 axb4 38. axb4 Qxb4 39. h4 Qd6 40. Qc2 Qf6 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.30"]
[Round "7"]
[White "Gheorghiu, Florin"]
[Black "Browne, Walter Shawn"]
[Result "1/2-1/2"]
[ECO "B98"]
[EventDate "1971.03.22"]
[PlyCount "50"]

1. e4 c5 2. Nf3 d6 3. Nc3 a6 4. d4 cxd4 5. Nxd4 Nf6 6. Bg5 e6 7. f4 Be7 8. Qf3 h6 9. Bh4 g5 10. fxg5 Nfd7 11. Nxe6 fxe6 12. Qh5+ Kf8 13. Bb5 Rh7 14. O-O+ Kg8 15. g6 Rg7 16. Rf7 Bxh4 17. Qxh6 Rxf7 18. gxf7+ Kxf7 19. Qh7+ Ke8 20. Qh8+ Kf7 21. Qh7+ Ke8 22. Qh5+ Kf8 23. Rf1+ Bf6 24. Qh8+ Ke7 25. Qh7+ Ke8 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.30"]
[Round "7"]
[White "Juarez, Carlos Eleodoro"]
[Black "Poch, Caesar G."]
[Result "0-1"]
[ECO "B43"]
[EventDate "1971.03.22"]
[PlyCount "56"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Nb3 b5 7. a3 Bb7 8. Bd3 d6 9. O-O Nd7 10. f4 Ngf6 11. Qf3 Be7 12. Be3 Rc8 13. Rae1 O-O 14. Bc1 d5 15. exd5 Nxd5 16. Qh3 N5f6 17. f5 e5 18. g4 e4 19. g5 exd3 20. Rxe7 Nd5 21. Nxd5 Bxd5 22. g6 hxg6 23. Bf4 Qd8 24. Bg5 Rxc2 25. Rf2 Rxf2 26. Kxf2 Bxb3 27. Qxd3 Nf6 28. Qe2 Bc4 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.30"]
[Round "7"]
[White "Mecking, Henrique"]
[Black "Najdorf, Miguel"]
[Result "1-0"]
[ECO "B99"]
[EventDate "1971.03.22"]
[PlyCount "75"]

1. e4 c5 2. Nf3 d6 3. Nc3 Nf6 4. d4 cxd4 5. Nxd4 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. O-O-O Nbd7 10. Be2 Rb8 11. g4 b5 12. Bxf6 Nxf6 13. g5 Nd7 14. Bd3 b4 15. Nce2 Nc5 16. Rhg1 g6 17. f5 e5 18. Nb3 Nxd3+ 19. Qxd3 Bd7 20. f6 Bb5 21. Qd2 Bd8 22. Ng3 O-O 23. Qg2 Rc8 24. Kb1 Qd7 25. Nf5 gxf5 26. Qh3 Kh8 27. exf5 Be2 28. Rg3 Bh5 29. Rf1 Qb5 30. Rf2 Qb6 31. Rfg2 Qb5 32. g6 fxg6 33. fxg6 Bxf6 34. Qxh5 Qf1+ 35. Nc1 Rc7 36. gxh7 Rxh7 37. Qxh7+ Kxh7 38. Rh3+ 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.30"]
[Round "7"]
[White "Pilnik, Herman"]
[Black "Planinc, Albin"]
[Result "0-1"]
[ECO "C12"]
[EventDate "1971.03.22"]
[PlyCount "119"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Nge2 Nf6 5. Bg5 dxe4 6. a3 Be7 7. Bxf6 gxf6 8. Nxe4 b6 9. Qd3 Bb7 10. O-O-O Nd7 11. Kb1 f5 12. N4c3 c6 13. Nf4 Qc7 14. Qe3 O-O-O 15. h4 Nf6 16. Be2 Rhg8 17. g3 Ng4 18. Bxg4 Rxg4 19. Rhe1 Kb8 20. Nce2 c5 21. dxc5 Rxd1+ 22. Rxd1 Bxc5 23. Qc3 Rg8 24. Nd3 Bd6 25. Qd2 Rc8 26. Nb4 Be5 27. f4 Bf6 28. Qd6 a5 29. Qxc7+ Kxc7 30. Na2 Bf3 31. Rd2 Rg8 32. Nac3 Bxc3 33. Nxc3 Rxg3 34. Nb5+ Kc6 35. Nd4+ Kc5 36. Nb3+ Kb5 37. Rd7 Rg1+ 38. Nc1 Bh5 39. Rc7 Ka6 40. b4 axb4 41. axb4 Rf1 42. c4 b5 43. Rc6+ Kb7 44. cxb5 Be2 45. Rd6 Bxb5 46. Rd4 Rh1 47. Kb2 Rxh4 48. Kb3 Rh2 49. Kc3 Rh3+ 50. Kb2 h5 51. Rd8 Rf3 52. Rf8 Rxf4 53. Nb3 Kc6 54. Kc3 e5 55. Rxf7 Rf3+ 56. Kd2 e4 57. Re7 Kd6 58. Re6+ Kd5 59. Re7 h4 60. Rb7 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.30"]
[Round "7"]
[White "Polugaevsky, Lev"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]
[ECO "A29"]
[EventDate "1971.03.22"]
[PlyCount "64"]

1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 O-O 5. Nf3 Re8 6. O-O e4 7. Nd4 Nc6 8. Nc2 Bxc3 9. dxc3 h6 10. Ne3 Ne5 11. Qc2 d6 12. Bxe4 Nxc4 13. Bg2 Nxe3 14. Bxe3 Qe7 15. c4 Ne4 16. b3 Bd7 17. Bd4 f5 18. Rae1 Rf8 19. f3 Nf6 20. e3 Rae8 21. Bh3 Nh7 22. f4 b6 23. e4 fxe4 24. Bxd7 Qxd7 25. Rxe4 Nf6 26. Rxe8 Qxe8 27. Qd1 c6 28. Re1 Qd7 29. Qd3 Re8 30. Rxe8+ Nxe8 31. Qg6 Kf8 32. Qe4 Kf7 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.30"]
[Round "7"]
[White "Rubinetti, Jorge Alberto"]
[Black "Sumiacher, Carlos"]
[Result "1-0"]
[ECO "E91"]
[EventDate "1971.03.22"]
[PlyCount "51"]

1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 d6 5. e4 Bg7 6. Nf3 O-O 7. Be2 Na6 8. O-O Nc7 9. Bf4 Nh5 10. Bg5 h6 11. Be3 e5 12. dxe6 Nxe6 13. Qd2 Kh7 14. Rfd1 Qf6 15. g3 Rd8 16. Rab1 Bf8 17. Nh4 Bd7 18. Nd5 Qg7 19. Bxh5 gxh5 20. Qe2 Nd4 21. Bxd4 cxd4 22. Qxh5 Rac8 23. b3 Re8 24. Nf5 Qg6 25. Qxg6+ Kxg6 26. Nh4+ 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.30"]
[Round "7"]
[White "Schweber, Samuel"]
[Black "Savon, Vladimir"]
[Result "1/2-1/2"]
[ECO "C80"]
[EventDate "1971.03.22"]
[PlyCount "82"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. Re1 Nc5 7. Nc3 Be7 8. Nd5 e4 9. Bxc6 dxc6 10. Nxe7 Qxe7 11. d4 Nd7 12. Bg5 f6 13. Nd2 O-O 14. Rxe4 Qf7 15. Bf4 Nb6 16. Nf3 Nd5 17. Bd2 b5 18. c3 a5 19. a4 Bf5 20. Re1 Nb6 21. axb5 cxb5 22. Bf4 Nc4 23. Qc1 a4 24. Nd2 Nb6 25. Qd1 g5 26. Bg3 Nd5 27. Nf1 Rae8 28. Qf3 Qd7 29. Ne3 Be4 30. Qg4 Qxg4 31. Nxg4 Kf7 32. Ne3 Nf4 33. f3 Bb7 34. Rad1 Kg6 35. Bxf4 gxf4 36. Nc2 Bd5 37. Rxe8 Rxe8 38. Re1 Rxe1+ 39. Nxe1 Bc4 40. Kf2 Kf5 41. g4+ fxg3+ 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.31"]
[Round "8"]
[White "Browne, Walter Shawn"]
[Black "Quinteros, Miguel Angel"]
[Result "0-1"]
[ECO "B80"]
[EventDate "1971.03.22"]
[PlyCount "56"]

1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. d4 cxd4 5. Nxd4 Qc7 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. f4 d6 10. g4 Nc6 11. Nxc6 bxc6 12. g5 Ne8 13. f5 exf5 14. exf5 d5 15. Kh1 Bd6 16. g6 h6 17. f6 Nxf6 18. Rxf6 gxf6 19. Bxh6 fxg6 20. Nxd5 Qh7 21. Nb6 Be5 22. Nxa8 Qxh6 23. Qg1 Rd8 24. Nb6 Bd4 25. Qf1 Bxb6 26. Qxf6 Bc7 27. h4 Rf8 28. Qe7 Qf4 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.31"]
[Round "8"]
[White "Gheorghiu, Florin"]
[Black "Rubinetti, Jorge Alberto"]
[Result "1-0"]
[ECO "D37"]
[EventDate "1971.03.22"]
[PlyCount "115"]

1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. d4 Be7 5. Bf4 c5 6. dxc5 Na6 7. e3 Nxc5 8. cxd5 exd5 9. Bb5+ Bd7 10. Bxd7+ Qxd7 11. O-O O-O 12. Be5 Rfd8 13. Qe2 a6 14. Rfd1 Qf5 15. Bc7 Rd7 16. Nd4 Qg6 17. Be5 Nfe4 18. Rac1 Re8 19. Nf3 Qe6 20. b3 Bf8 21. Qc2 h6 22. Ne2 Ng5 23. Ned4 Nxf3+ 24. Nxf3 Ne4 25. Bb2 Rdd8 26. Nd4 Qd7 27. Qc7 Bd6 28. Qxd7 Rxd7 29. Nf5 Be5 30. Bxe5 Rxe5 31. Rc8+ Kh7 32. Nd4 Nf6 33. Rdc1 Re8 34. R8c7 Red8 35. f3 g6 36. Rxd7 Rxd7 37. Rc8 Kg7 38. Kf2 Nh7 39. Ke2 Nf8 40. Kd3 h5 41. a4 Re7 42. a5 Nd7 43. Kd2 Nf6 44. b4 Ne8 45. Rd8 Nc7 46. Kd3 Kf6 47. Nb3 Ke5 48. Nc5 g5 49. g3 f6 50. h3 Nb5 51. f4+ gxf4 52. gxf4+ Kf5 53. Rxd5+ Kg6 54. Rd7 Rxd7+ 55. Nxd7 Na7 56. e4 Nc6 57. Kc4 Kf7 58. e5 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.31"]
[Round "8"]
[White "Najdorf, Miguel"]
[Black "Juarez, Carlos Eleodoro"]
[Result "1-0"]
[ECO "A30"]
[EventDate "1971.03.22"]
[PlyCount "53"]

1. c4 e6 2. g3 c5 3. Nf3 b6 4. Bg2 Bb7 5. O-O Nf6 6. b3 g6 7. Bb2 Bg7 8. d3 d5 9. e3 O-O 10. Qe2 Nc6 11. Rd1 Qc7 12. Nc3 Rac8 13. cxd5 exd5 14. d4 Na5 15. Rac1 c4 16. Ba3 Rfd8 17. Nb5 Qb8 18. Be7 cxb3 19. Bxd8 Rxd8 20. Ne5 bxa2 21. Qxa2 Ne8 22. Nc3 Nc7 23. e4 Qa8 24. Nxd5 Nxd5 25. exd5 Bxd5 26. Bxd5 Rxd5 27. Nc6 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.31"]
[Round "8"]
[White "Panno, Oscar"]
[Black "Mecking, Henrique"]
[Result "1-0"]
[ECO "E05"]
[EventDate "1971.03.22"]
[PlyCount "171"]

1. c4 Nf6 2. g3 e6 3. Bg2 d5 4. Nf3 Be7 5. O-O O-O 6. d4 dxc4 7. Ne5 c5 8. dxc5 Bxc5 9. Nc3 Qe7 10. Bg5 h6 11. Bxf6 Qxf6 12. Nxc4 Nc6 13. Ne4 Qe7 14. e3 Rd8 15. Qb3 Bd7 16. Qxb7 Rab8 17. Qc7 Rdc8 18. Qf4 e5 19. Qf3 Be6 20. Rfc1 Nb4 21. b3 Bb6 22. g4 Nd3 23. Rc3 Bxc4 24. bxc4 Nc5 25. Rd1 Rd8 26. Rd5 Rbc8 27. Qf5 Na4 28. Rxe5 Rd1+ 29. Bf1 Qd8 30. Ra3 Nb2 31. Rd5 Rxd5 32. Qxd5 Qe7 33. Rb3 Rd8 34. Qf5 Na4 35. Rd3 Rxd3 36. Bxd3 g6 37. Nf6+ Kg7 38. Nh5+ Kf8 39. Qc8+ Qd8 40. Qxd8+ Bxd8 41. Nf4 Ke7 42. Kf1 Kd6 43. Bc2 Nb6 44. Bb3 Kc5 45. Nd3+ Kc6 46. Ke2 Be7 47. h3 Kc7 48. f4 Nd7 49. c5 f6 50. Bf7 g5 51. Nb4 Nxc5 52. Nd5+ Kd6 53. Nxe7 Kxe7 54. Bg8 Kd6 55. Kf3 Ke7 56. h4 Kd6 57. hxg5 hxg5 58. Bb3 Ke7 59. Bc4 Kd6 60. e4 gxf4 61. Kxf4 Ke7 62. Kf5 Nd7 63. Bb5 Nc5 64. e5 fxe5 65. Kxe5 Kf7 66. Kd5 Ne6 67. Bd7 Nf4+ 68. Kc6 Nd3 69. Kb5 Kf6 70. a4 Nc1 71. a5 Nb3 72. Kb4 Nd4 73. Kc4 Ne2 74. Kd5 Nc1 75. Ba4 Kg5 76. Kc6 Kxg4 77. Kb7 Nd3 78. Kxa7 Nc5 79. Bd1+ Kf4 80. Kb6 Nd7+ 81. Kc6 Nb8+ 82. Kb7 Nd7 83. Ba4 Nc5+ 84. Kc6 Na6 85. Bb5 Nb4+ 86. Kc5 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.31"]
[Round "8"]
[White "Planinc, Albin"]
[Black "Polugaevsky, Lev"]
[Result "0-1"]
[ECO "B61"]
[EventDate "1971.03.22"]
[PlyCount "122"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 Bd7 7. Qd2 Rc8 8. f4 h6 9. Bh4 Nxd4 10. Qxd4 Qb6 11. Qxb6 axb6 12. e5 dxe5 13. fxe5 Ng4 14. e6 Bxe6 15. Bb5+ Bd7 16. Bxd7+ Kxd7 17. O-O-O+ Ke8 18. Nd5 Rc6 19. Rd4 g5 20. Rxg4 gxh4 21. Rxh4 e6 22. Nf6+ Ke7 23. Rf1 Bg7 24. Rhf4 h5 25. R4f3 Bxf6 26. Rxf6 Rh7 27. R1f3 Rg7 28. g3 Rc4 29. Rh6 h4 30. Rb3 hxg3 31. hxg3 Rc6 32. Rh4 Kd7 33. Rhb4 Kc7 34. a4 Rg5 35. Rf4 f5 36. Rfb4 Rh5 37. c4 Rh1+ 38. Kd2 Rh2+ 39. Ke3 Rc2 40. Kd4 Re2 41. a5 Re4+ 42. Kd3 bxa5 43. Rxb7+ Kd6 44. R3b6 Rexc4 45. Rxc6+ Kxc6 46. Re7 Re4 47. g4 Rxg4 48. Rxe6+ Kd5 49. Ra6 a4 50. Ra5+ Ke6 51. Ra6+ Ke5 52. Ra5+ Kf6 53. Ke3 Rb4 54. Ra8 f4+ 55. Kf3 Ke5 56. Re8+ Kd5 57. Rc8 Rxb2 58. Kxf4 a3 59. Ke3 a2 60. Rd8+ Kc4 61. Ra8 Kc3 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.31"]
[Round "8"]
[White "Poch, Caesar G."]
[Black "Brond, Victor"]
[Result "0-1"]
[ECO "E62"]
[EventDate "1971.03.22"]
[PlyCount "108"]

1. Nf3 Nf6 2. c4 g6 3. d4 Bg7 4. Nc3 d6 5. g3 O-O 6. Bg2 Nc6 7. O-O Bg4 8. h3 Bxf3 9. Bxf3 Nd7 10. e3 e5 11. d5 Ne7 12. Bg2 f5 13. e4 f4 14. b4 g5 15. c5 Nf6 16. Bd2 Ng6 17. Rc1 Rf7 18. cxd6 cxd6 19. a4 Bf8 20. Bf3 Rg7 21. Qe2 Kh8 22. Kh2 Rc8 23. Nb5 a6 24. Rxc8 Qxc8 25. Rc1 Qd8 26. Nc3 Be7 27. a5 Nf8 28. Bh5 Qd7 29. Bg4 Qe8 30. Bf5 Bd8 31. Nb1 Bc7 32. Na3 Qf7 33. Qd3 h5 34. b5 g4 35. h4 Ng6 36. b6 Bd8 37. Be1 Ng8 38. Rc8 Bxh4 39. Bxg6 Rxg6 40. gxh4 Qe7 41. f3 g3+ 42. Kg1 Qxh4 43. Rc2 Nf6 44. Nc4 Qh3 45. Qf1 Qd7 46. Nd2 g2 47. Qf2 Rg3 48. Qxg3 fxg3 49. Bxg3 h4 50. Bh2 h3 51. Nc4 Qa4 52. Ne3 Qxa5 53. Rc8+ Ng8 54. Bg3 Qa1+ 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.31"]
[Round "8"]
[White "Savon, Vladimir"]
[Black "Pilnik, Herman"]
[Result "1-0"]
[ECO "A41"]
[EventDate "1971.03.22"]
[PlyCount "80"]

1. c4 e5 2. Nc3 d6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nh6 6. d4 Nd7 7. dxe5 dxe5 8. h4 f6 9. Bxh6 Bxh6 10. h5 g5 11. Qc2 c6 12. Rd1 Qe7 13. Bh3 O-O 14. Nh2 f5 15. Bxf5 Rxf5 16. Qxf5 Nc5 17. Qf3 e4 18. Qe3 a5 19. f3 Bg7 20. Nxe4 Nxe4 21. Qxe4 Qxe4 22. fxe4 Be6 23. b3 Be5 24. Kf2 g4 25. Nf1 Bc7 26. Ne3 Bb6 27. Rd3 a4 28. Rhd1 axb3 29. axb3 Kf7 30. Kg2 Kf6 31. Nf5 Ke5 32. Nd6 Ra7 33. Rf1 Ra2 34. Nf7+ Bxf7 35. Rxf7 Rxe2+ 36. Kf1 Rh2 37. Re7+ Kf6 38. Rxb7 Bc5 39. b4 Be7 40. Rdd7 Ke5 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.03.31"]
[Round "8"]
[White "Sumiacher, Carlos"]
[Black "Schweber, Samuel"]
[Result "1-0"]
[ECO "A25"]
[EventDate "1971.03.22"]
[PlyCount "65"]

1. c4 Nf6 2. Nc3 e5 3. g3 Bb4 4. Bg2 O-O 5. e4 d6 6. Nge2 a5 7. O-O Nc6 8. d3 Bc5 9. h3 Ne8 10. Nb5 Be6 11. b3 Bd7 12. d4 exd4 13. Nbxd4 Nf6 14. Bb2 Re8 15. Qd3 Nxd4 16. Nxd4 a4 17. Rad1 axb3 18. Nxb3 Bb4 19. Nd4 Qe7 20. a3 Bc5 21. Rfe1 Ra4 22. Kh2 Bxd4 23. Qxd4 b5 24. e5 dxe5 25. Rxe5 Qf8 26. Rg5 h6 27. Rc5 Be6 28. Rxc7 Rxc4 29. Rxc4 Bxc4 30. Qf4 Qe7 31. Rd6 Nh7 32. Bc6 Rd8 33. Qd4 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.02"]
[Round "9"]
[White "Brond, Victor"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "E30"]
[EventDate "1971.03.22"]
[PlyCount "92"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 c5 5. d5 h6 6. Bh4 exd5 7. cxd5 O-O 8. e3 Re8 9. Bd3 Bxc3+ 10. bxc3 d6 11. Ne2 Nbd7 12. O-O Ne5 13. c4 Ng6 14. Bg3 Nh5 15. Qc2 Qf6 16. Rae1 Bd7 17. Nc3 Nxg3 18. hxg3 Ne5 19. Be2 Ng4 20. Bxg4 Bxg4 21. e4 a6 22. Re3 Rab8 23. a4 b6 24. Rfe1 Qe5 25. Qb3 Bd7 26. f4 Qd4 27. Kh2 b5 28. axb5 axb5 29. cxb5 Qb4 30. Qd1 Bxb5 31. e5 dxe5 32. fxe5 Bd7 33. e6 fxe6 34. dxe6 Bc6 35. Qd6 Rbc8 36. e7 Qd4 37. Qe6+ Kh8 38. Rf1 Bd7 39. Qe5 Bc6 40. Rf4 Qxe5 41. Rxe5 Kg8 42. Rxc5 Bd7 43. Rxc8 Bxc8 44. Re4 Bd7 45. Nd5 Kf7 46. Rf4+ Kg8 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.02"]
[Round "9"]
[White "Juarez, Carlos Eleodoro"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "B43"]
[EventDate "1971.03.22"]
[PlyCount "91"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be3 Nf6 7. Bd3 b5 8. a3 Bb7 9. O-O Bc5 10. Qe2 d6 11. Rae1 Nbd7 12. f4 Rc8 13. h3 O-O 14. Nb3 Bxe3+ 15. Qxe3 Nc5 16. Nxc5 Qxc5 17. Kh2 Qxe3 18. Rxe3 Nd7 19. Rd1 Rfd8 20. Be2 Nb6 21. Rd4 Kf8 22. Bd3 Ke7 23. a4 Nc4 24. Bxc4 bxc4 25. b3 cxb3 26. cxb3 Rc5 27. b4 Rc7 28. b5 Rdc8 29. bxa6 Bxa6 30. Nb5 Rc4 31. Rxc4 Rxc4 32. Nc3 g6 33. g4 h6 34. Kg3 Bb7 35. Kf2 Bc6 36. a5 Rc5 37. Nd5+ Bxd5 38. exd5 Rxa5 39. dxe6 fxe6 40. Rb3 g5 41. Kg3 Kf6 42. h4 gxf4+ 43. Kxf4 Ra4+ 44. Kg3 Re4 45. Rb8 d5 46. h5 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.02"]
[Round "9"]
[White "Mecking, Henrique"]
[Black "Planinc, Albin"]
[Result "0-1"]
[ECO "C78"]
[EventDate "1971.03.22"]
[PlyCount "116"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 7. Re1 Bc5 8. c3 O-O 9. d4 Bb6 10. Bg5 h6 11. Bh4 d6 12. Qd3 Na5 13. Bc2 c5 14. d5 c4 15. Qe2 g6 16. Nbd2 Rc8 17. Rac1 Kg7 18. b4 cxb3 19. axb3 Qc7 20. c4 b4 21. Bxf6+ Kxf6 22. Ra1 Ra8 23. Rf1 Bc8 24. Ne1 Nb7 25. Nd3 a5 26. Kh1 Kg7 27. f4 exf4 28. Rxf4 Bd4 29. Rd1 Bd7 30. Rff1 Rae8 31. Qf3 Qd8 32. Qf4 Qe7 33. Nf3 Bc3 34. Qe3 f5 35. Qa7 fxe4 36. Qxb7 exf3 37. gxf3 Bh3 38. Qxe7+ Rxe7 39. Rg1 Rxf3 40. c5 Re2 41. Rxg6+ Kxg6 42. Nf4+ Kf7 43. Nxe2 Rf2 44. Nxc3 Rxc2 45. Na4 dxc5 46. Nb6 Rf2 47. Na4 Rc2 48. Nb6 Ke8 49. d6 Rf2 50. Na4 c4 51. bxc4 Rf1+ 52. Rxf1 Bxf1 53. Nb2 Kd7 54. Kg1 Bh3 55. c5 Kc6 56. Na4 b3 57. Kf2 Kb5 58. Ke3 Bd7 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.02"]
[Round "9"]
[White "Pilnik, Herman"]
[Black "Sumiacher, Carlos"]
[Result "1-0"]
[ECO "B31"]
[EventDate "1971.03.22"]
[PlyCount "77"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. c3 Nf6 5. d3 Bg7 6. O-O O-O 7. Nbd2 Qc7 8. Re1 d6 9. Nf1 e5 10. Ne3 a6 11. Ba4 b5 12. Bb3 Bb7 13. a4 Na5 14. Ba2 Rad8 15. axb5 axb5 16. b4 Nc6 17. Ba3 cxb4 18. cxb4 Rfe8 19. Rc1 Qe7 20. Re2 Rd7 21. Rcc2 Ra8 22. Nd5 Qd8 23. Qc1 Nxd5 24. Bxd5 Ne7 25. Bb3 h6 26. Bb2 Rc8 27. Rxc8 Qxc8 28. Rc2 Qe8 29. Qe3 Nc6 30. Bc3 Qd8 31. h3 Qa8 32. Ra2 Qd8 33. d4 exd4 34. Nxd4 Nxd4 35. Bxd4 Bxd4 36. Qxd4 Qg5 37. Rc2 Re7 38. Bd5 Bxd5 39. Rc8+ 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.02"]
[Round "9"]
[White "Polugaevsky, Lev"]
[Black "Savon, Vladimir"]
[Result "1/2-1/2"]
[ECO "E14"]
[EventDate "1971.03.22"]
[PlyCount "28"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 Be7 6. O-O O-O 7. b3 d5 8. Bb2 Nbd7 9. Nc3 c5 10. cxd5 Nxd5 11. Nxd5 Bxd5 12. Qe2 cxd4 13. Nxd4 Nc5 14. Bc4 Rc8 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.02"]
[Round "9"]
[White "Quinteros, Miguel Angel"]
[Black "Poch, Caesar G."]
[Result "0-1"]
[ECO "E60"]
[EventDate "1971.03.22"]
[PlyCount "58"]

1. c4 Nf6 2. d4 g6 3. d5 c6 4. Nc3 b5 5. cxb5 cxb5 6. Nxb5 Qa5+ 7. Nc3 Bg7 8. Qd4 O-O 9. Bd2 e5 10. dxe6 dxe6 11. Ne4 Qf5 12. Ng3 Qb5 13. e3 Qb7 14. Qb4 Qd7 15. Bb5 Nc6 16. Qa4 Bb7 17. Nf3 Nd5 18. Nd4 Bxd4 19. Bxc6 Bxc6 20. Qxd4 Bb5 21. a4 e5 22. Qxe5 Ba6 23. Ne4 Qg4 24. Ng3 Rad8 25. Qd4 Qd7 26. Bc3 f6 27. Rd1 Rfe8 28. Ne2 Qf5 29. Rd2 Bxe2 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.02"]
[Round "9"]
[White "Rubinetti, Jorge Alberto"]
[Black "Browne, Walter Shawn"]
[Result "1/2-1/2"]
[ECO "A43"]
[EventDate "1971.03.22"]
[PlyCount "135"]

1. d4 c5 2. d5 Nf6 3. Nc3 d6 4. e4 g6 5. Nf3 Bg7 6. Bb5+ Nbd7 7. Be2 O-O 8. O-O Ne8 9. Bf4 Rb8 10. a4 Nc7 11. Re1 a6 12. Bf1 b5 13. Qd2 Re8 14. e5 b4 15. exd6 exd6 16. Rxe8+ Nxe8 17. Nd1 Qe7 18. c4 bxc3 19. Nxc3 Ndf6 20. Re1 Qb7 21. b3 Qb4 22. Bc4 Bg4 23. Na2 Qb6 24. a5 Qb7 25. Qd3 Bf5 26. Qd1 Bd7 27. h3 Bb5 28. Qd3 Qc7 29. Bd2 Nd7 30. Qc2 Nef6 31. Bc3 Qb7 32. Qd3 Bxc4 33. bxc4 Qb3 34. Nc1 Qb1 35. Qxb1 Rxb1 36. Nd2 Rb8 37. Nd3 Bf8 38. f4 Ne8 39. Kf2 Bg7 40. Bxg7 Kxg7 41. Re7 Nef6 42. g4 Kf8 43. Re1 Re8 44. Rxe8+ Kxe8 45. Kf3 Ke7 46. Nf1 Ng8 47. Ng3 f6 48. h4 Nh6 49. g5 Nf7 50. Ne4 f5 51. Ng3 Nd8 52. Nc1 Nf8 53. Nb3 Nd7 54. Ke3 Nf8 55. Kd3 Nb7 56. Kc3 Kf7 57. Kb2 Kg7 58. Ka3 h5 59. Ka4 Kf7 60. Nd2 Ke7 61. Nb1 Kd7 62. Na3 Kc7 63. Ne2 Nd7 64. Nc3 Nf8 65. Nd1 Nd7 66. Nb2 Nf8 67. Nb5+ Kb8 68. Nc3 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.02"]
[Round "9"]
[White "Schweber, Samuel"]
[Black "Gheorghiu, Florin"]
[Result "1/2-1/2"]
[ECO "B31"]
[EventDate "1971.03.22"]
[PlyCount "61"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. Re1 Nf6 6. Nc3 O-O 7. e5 Ne8 8. Bxc6 bxc6 9. d3 d6 10. h3 f6 11. exd6 exd6 12. d4 cxd4 13. Nxd4 Bd7 14. Qe2 Rf7 15. Ne6 Bxe6 16. Qxe6 Nc7 17. Qb3 f5 18. Bd2 Rb8 19. Qa3 Qd7 20. Bf4 Bf8 21. Rad1 d5 22. Qxa7 Rxb2 23. Rb1 Rxb1 24. Nxb1 Nb5 25. Qa8 Qb7 26. Re8 Qxa8 27. Rxa8 Ra7 28. Rxa7 Nxa7 29. Kf1 Kf7 30. Ke2 c5 31. c4 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.03"]
[Round "10"]
[White "Browne, Walter Shawn"]
[Black "Poch, Caesar G."]
[Result "1/2-1/2"]
[ECO "B80"]
[EventDate "1971.03.22"]
[PlyCount "92"]

1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. d4 cxd4 5. Nxd4 Qc7 6. g3 Nf6 7. Bg2 d6 8. O-O Be7 9. Nce2 Nbd7 10. c3 O-O 11. b3 Rb8 12. c4 Nc5 13. Nc3 Rd8 14. Bb2 b6 15. Qe2 Bb7 16. Rac1 Rbc8 17. Rfd1 Qb8 18. Re1 Bf8 19. Rcd1 Ncd7 20. Rd2 Ne5 21. f4 Nc6 22. Nc2 Ba8 23. Kh1 Nd7 24. Nd4 Nf6 25. Red1 Nxd4 26. Rxd4 Bc6 27. a4 Nd7 28. b4 a5 29. bxa5 bxa5 30. Nb5 Nc5 31. Qc2 Qb7 32. Ba3 Qa8 33. Bxc5 dxc5 34. Rxd8 Rxd8 35. Rxd8 Qxd8 36. e5 Bxb5 37. axb5 Be7 38. h3 h6 39. Kh2 Qb6 40. Qe4 Bd8 41. Qa8 Qc7 42. Bc6 g6 43. Kg2 Kg7 44. Kf3 Qe7 45. Qa6 Qc7 46. Ke2 Qb8 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.03"]
[Round "10"]
[White "Gheorghiu, Florin"]
[Black "Pilnik, Herman"]
[Result "1/2-1/2"]
[ECO "A13"]
[EventDate "1971.03.22"]
[PlyCount "41"]

1. Nf3 d5 2. c4 e6 3. g3 dxc4 4. Qa4+ Nd7 5. Qxc4 a6 6. Qc2 b5 7. Bg2 Bb7 8. O-O Ngf6 9. d4 Rc8 10. Bg5 c5 11. Qd1 h6 12. Bxf6 Nxf6 13. a4 Qb6 14. axb5 axb5 15. dxc5 Bxc5 16. e3 O-O 17. Qe2 Bd5 18. Nbd2 Rfd8 19. Rfc1 Bf8 20. Nd4 Rxc1+ 21. Rxc1 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.03"]
[Round "10"]
[White "Najdorf, Miguel"]
[Black "Quinteros, Miguel Angel"]
[Result "1/2-1/2"]
[ECO "A37"]
[EventDate "1971.03.22"]
[PlyCount "115"]

1. c4 g6 2. Nc3 c5 3. g3 Bg7 4. Bg2 Nc6 5. Nf3 e6 6. O-O Nge7 7. b3 d5 8. cxd5 Nxd5 9. Bb2 O-O 10. Qc1 Nxc3 11. Bxc3 e5 12. d3 Bg4 13. h3 Bd7 14. Qd2 Rc8 15. Rac1 h6 16. e3 Bf5 17. Rfd1 Qd6 18. Ne1 Rfd8 19. Qe2 Qe7 20. Nc2 Qd7 21. e4 Bxh3 22. Bxh3 Qxh3 23. Ne3 Qe6 24. Kg2 h5 25. Rh1 Bh6 26. Rcd1 Nd4 27. Qe1 Rf8 28. Nd5 f5 29. Bd2 Bxd2 30. Qxd2 Kg7 31. Qg5 fxe4 32. dxe4 Nf3 33. Qe7+ Qxe7 34. Nxe7 Rc7 35. Nf5+ gxf5 36. Kxf3 fxe4+ 37. Kg2 Kg6 38. Rh4 Rcc8 39. Rd2 e3 40. fxe3 b6 41. b4 cxb4 42. Rxb4 Rc7 43. Rb5 Rf5 44. a4 Rg5 45. Kh3 Rc3 46. a5 Rxe3 47. Rg2 e4 48. Rxg5+ Kxg5 49. axb6 axb6 50. Rb2 Rf3 51. Rxb6 Rf6 52. Rb5+ Rf5 53. Rb8 Kf6 54. Rb6+ Ke5 55. Rb5+ Ke6 56. Rb6+ Kd7 57. Kg2 Ke7 58. Ra6 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.03"]
[Round "10"]
[White "Panno, Oscar"]
[Black "Brond, Victor"]
[Result "1-0"]
[ECO "A56"]
[EventDate "1971.03.22"]
[PlyCount "83"]

1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6 6. Bd3 Bg7 7. h3 a6 8. Nf3 Nbd7 9. Qe2 Rb8 10. a3 b6 11. Be3 Rb7 12. Rb1 Qc7 13. Nd2 h5 14. Nf3 Nh7 15. b4 Qd8 16. g3 Bf6 17. h4 Be7 18. Rb3 Ndf6 19. bxc5 bxc5 20. Rxb7 Bxb7 21. Qb2 Bc8 22. Bd2 Ng4 23. Ng1 f5 24. f3 Ngf6 25. Qb1 f4 26. Ke2 fxg3 27. Qe1 g2 28. Rh2 Ng4 29. fxg4 Bxg4+ 30. Ke3 g5 31. Rxg2 gxh4 32. Be2 h3 33. Rh2 Bh4 34. Qd1 Nf6 35. Nxh3 O-O 36. Kd3 Qd7 37. Ng5 Bxg5 38. Bxg5 Qg7 39. Bxf6 Rxf6 40. Rg2 Rg6 41. Bxg4 Rxg4 42. Rxg4 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.03"]
[Round "10"]
[White "Planinc, Albin"]
[Black "Juarez, Carlos Eleodoro"]
[Result "1-0"]
[ECO "B42"]
[EventDate "1971.03.22"]
[PlyCount "85"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Qc7 6. O-O Nc6 7. Nxc6 bxc6 8. Qe2 d6 9. Nd2 Nf6 10. f4 Be7 11. e5 Nd7 12. exd6 Qxd6 13. Nc4 Qc7 14. f5 e5 15. Bd2 a5 16. Qe1 a4 17. Ba5 Qb8 18. Bc3 f6 19. Qh4 Ba6 20. Qh5+ Kf8 21. Rae1 Bb4 22. Bxb4+ Qxb4 23. Re4 Qc5+ 24. Kh1 Bb5 25. b4 axb3 26. axb3 Ra6 27. b4 Qe7 28. Nb2 Bxd3 29. Nxd3 Ra2 30. Qe2 Nb6 31. Nc5 Kg8 32. Qe3 Nd5 33. Qb3 Qa7 34. Ree1 Kf7 35. Qh3 h5 36. Qg3 Rh6 37. Ne6 Kg8 38. b5 Ra3 39. Rf3 Ra1 40. h4 cxb5 41. Rxa1 Qxa1+ 42. Kh2 g6 43. Ra3 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.03"]
[Round "10"]
[White "Rubinetti, Jorge Alberto"]
[Black "Schweber, Samuel"]
[Result "0-1"]
[ECO "D27"]
[EventDate "1971.03.22"]
[PlyCount "130"]

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 cxd4 9. exd4 Nc6 10. Bg5 Be7 11. Rc1 a6 12. Bd3 Nb4 13. Bb1 b6 14. Ne5 Bb7 15. Re1 Nbd5 16. Qd3 g6 17. Bh6 Re8 18. Qh3 Bf8 19. Bxf8 Rxf8 20. Qh6 Rc8 21. f3 Nxc3 22. bxc3 b5 23. Qd2 Rc7 24. Qb2 Nd5 25. c4 bxc4 26. Rxc4 Rxc4 27. Nxc4 Bc6 28. Ne5 Bb5 29. Bd3 Bxd3 30. Nxd3 Qd6 31. Rb1 Rd8 32. Nc5 Nf4 33. Nb3 Qb4 34. Kh1 Rb8 35. Rd1 a5 36. Qc1 Nd5 37. h4 a4 38. Nc5 Qb2 39. Qxb2 Rxb2 40. a3 Ra2 41. Nxa4 Rxa3 42. Nc5 Ra2 43. Rg1 Rd2 44. Nb3 Rd3 45. Rb1 Ne7 46. Kh2 Nf5 47. Kh3 h5 48. Rb2 Kf8 49. Rb1 Ke7 50. Nc5 Rxd4 51. Rb7+ Ke8 52. Rb8+ Rd8 53. Rxd8+ Kxd8 54. Nd3 Ke7 55. Ne5 Nh6 56. g3 Kd6 57. f4 Kd5 58. Kg2 Ke4 59. Nd7 Ng4 60. Nc5+ Ke3 61. Nd7 Ke2 62. Nc5 Ne3+ 63. Kh3 Kf2 64. Nd3+ Kg1 65. Ne5 f5 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.03"]
[Round "10"]
[White "Savon, Vladimir"]
[Black "Mecking, Henrique"]
[Result "1-0"]
[ECO "D13"]
[EventDate "1971.03.22"]
[PlyCount "143"]

1. c4 c6 2. d4 d5 3. cxd5 cxd5 4. Nc3 Nf6 5. Nf3 Nc6 6. Bf4 e6 7. e3 Bd6 8. Bg3 O-O 9. Bd3 h6 10. Rc1 Bxg3 11. hxg3 Qb6 12. Qd2 Bd7 13. Na4 Qc7 14. Nc5 Rfc8 15. O-O Be8 16. b4 Qd6 17. b5 Nd8 18. Ne5 Nd7 19. Ncxd7 Bxd7 20. Rxc8 Rxc8 21. Rc1 Rxc1+ 22. Qxc1 Be8 23. Qc8 Kf8 24. Qa8 Qb6 25. Qb8 Ke7 26. a4 f6 27. Ng6+ Bxg6 28. Bxg6 Kd7 29. Kh2 Qa5 30. e4 dxe4 31. d5 exd5 32. Bf5+ Ke7 33. Qc8 Kd6 34. Qd7+ Ke5 35. g4 Qb6 36. Qe7+ Ne6 37. a5 Qd6 38. Qxb7 Nd4 39. b6 axb6 40. a6 Nb5 41. a7 Nxa7 42. Qxa7 Kd4+ 43. Kh3 g5 44. Qa1+ Kc5 45. Qc1+ Kb4 46. Qd2+ Kc5 47. Qc3+ Kb5 48. Bg6 Qe5 49. Qb3+ Kc5 50. Qa3+ Kb5 51. g3 Kc6 52. Qa4+ b5 53. Qa7 Qc7 54. Be8+ Kd6 55. Qxc7+ Kxc7 56. Bxb5 Kd6 57. Kg2 Ke5 58. Bd7 Kd4 59. Kf1 Kd3 60. Be6 Kd4 61. Ke2 Ke5 62. Bd7 Kd4 63. Bf5 Ke5 64. Bg6 Kd4 65. Kd2 Ke5 66. Ke3 d4+ 67. Ke2 Kd5 68. f3 e3 69. Kd3 Kc5 70. Be4 Kd6 71. f4 Kc5 72. Bf3 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.03"]
[Round "10"]
[White "Sumiacher, Carlos"]
[Black "Polugaevsky, Lev"]
[Result "0-1"]
[ECO "A11"]
[EventDate "1971.03.22"]
[PlyCount "43"]

1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. Bg2 Bf5 5. Qb3 Qb6 6. cxd5 Qxb3 7. axb3 Nxd5 8. Nc3 Nb4 9. Nd4 e5 10. Rxa7 Rxa7 11. Nxf5 Nc2+ 12. Kd1 Na1 13. d3 g6 14. Be3 Ra6 15. Nh4 Nxb3 16. Nf3 Bg7 17. Kc2 Nd4+ 18. Bxd4 exd4 19. Ne4 Nd7 20. h4 f5 21. Neg5 Ke7 22. Nd2 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.04"]
[Round "11"]
[White "Brond, Victor"]
[Black "Planinc, Albin"]
[Result "1-0"]
[ECO "A76"]
[EventDate "1971.03.22"]
[PlyCount "65"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Qc2 Bg4 11. h3 Bxf3 12. Bxf3 a6 13. a4 Nbd7 14. Bf4 Qc7 15. Rac1 Rab8 16. Be2 c4 17. Rfe1 b5 18. axb5 axb5 19. b4 cxb3 20. Qxb3 Nc5 21. Qb1 b4 22. Nb5 Qb6 23. Nxd6 Ncxe4 24. Nxe4 Nxe4 25. Bxb8 Qxf2+ 26. Kh1 Nc3 27. Qxb4 Nxe2 28. Qb5 Re3 29. Rf1 Qh4 30. Rc8+ Bf8 31. Qd7 f5 32. Rxf8+ Kxf8 33. Bd6+ 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.04"]
[Round "11"]
[White "Juarez, Carlos Eleodoro"]
[Black "Savon, Vladimir"]
[Result "1/2-1/2"]
[ECO "B07"]
[EventDate "1971.03.22"]
[PlyCount "109"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5 h6 5. Be3 Ng4 6. Bf4 Bg7 7. Nf3 Nc6 8. Bg3 e5 9. dxe5 Ngxe5 10. Nxe5 Nxe5 11. Be2 O-O 12. O-O Be6 13. Nd5 c6 14. Nf4 Bc4 15. c3 Re8 16. Re1 Qb6 17. b3 Bxe2 18. Rxe2 Rad8 19. Kh1 h5 20. f3 Bh6 21. Nd3 Qa5 22. Qc2 Bg7 23. Rd1 Nxd3 24. Rxd3 d5 25. e5 Qc7 26. f4 Qd7 27. Bh4 Rc8 28. Rg3 c5 29. h3 Rc6 30. Rd2 Qe6 31. Bg5 d4 32. cxd4 cxd4 33. Qe4 f6 34. Qxg6 fxg5 35. Qxg5 Kh7 36. Rxd4 Qf7 37. Rgd3 Bh6 38. Rd7 Bxg5 39. Rxf7+ Kg6 40. Rdd7 Bh6 41. h4 Rc1+ 42. Kh2 Bxf4+ 43. Rxf4 Rxe5 44. Rxb7 Rc2 45. Rff7 Rxa2 46. Rg7+ Kh6 47. Rxa7 Rxa7 48. Rxa7 Rb5 49. Ra3 Kg6 50. Kg3 Rb4 51. Kf3 Rxh4 52. Ra2 Rb4 53. Rb2 Kf5 54. Kg3 h4+ 55. Kh3 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.04"]
[Round "11"]
[White "Mecking, Henrique"]
[Black "Sumiacher, Carlos"]
[Result "1/2-1/2"]
[ECO "A79"]
[EventDate "1971.03.22"]
[PlyCount "61"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 g6 6. e4 d6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 Na6 11. f3 Nc7 12. a4 Nd7 13. f4 f5 14. Nc4 Bd4+ 15. Kh1 Qf6 16. exf5 gxf5 17. Ra3 b6 18. Bh5 Re7 19. Ne2 Bb7 20. Nxd4 cxd4 21. Rd3 Nc5 22. Rg3+ Kh8 23. Nxd6 Nxd5 24. Nxb7 Rxb7 25. Be2 Rd8 26. Bc4 Ne4 27. Rd3 Nb4 28. Rdf3 Rc7 29. b3 a5 30. Bb2 h6 31. Re1 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.04"]
[Round "11"]
[White "Pilnik, Herman"]
[Black "Rubinetti, Jorge Alberto"]
[Result "1-0"]
[ECO "C63"]
[EventDate "1971.03.22"]
[PlyCount "85"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. d3 fxe4 5. dxe4 Nf6 6. O-O d6 7. Nc3 Be7 8. Qd3 Bg4 9. h3 Bxf3 10. Qxf3 O-O 11. Qd1 Kh8 12. Be3 Qe8 13. Nd5 Bd8 14. Nxf6 Bxf6 15. c3 Qg6 16. Qg4 Qxg4 17. hxg4 h6 18. g3 Bg5 19. f4 Bf6 20. Kg2 Rfe8 21. f5 Kg8 22. Rh1 Kf7 23. Bc4+ Ke7 24. Rh5 Nd8 25. g5 hxg5 26. Bxg5 Nf7 27. Be3 Rh8 28. Rah1 Rxh5 29. Rxh5 Rg8 30. Kf3 a6 31. Rh7 Rh8 32. Rxh8 Nxh8 33. Kg4 g6 34. fxg6 Nxg6 35. Kf5 Nf8 36. Bh6 Nd7 37. g4 Bh4 38. g5 c6 39. g6 Nf6 40. g7 d5 41. exd5 b5 42. d6+ Kxd6 43. Bb3 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.04"]
[Round "11"]
[White "Poch, Caesar G."]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "E92"]
[EventDate "1971.03.22"]
[PlyCount "94"]

1. Nf3 c5 2. c4 Nf6 3. Nc3 g6 4. d4 Bg7 5. d5 O-O 6. e4 d6 7. Be2 e5 8. Bg5 h6 9. Bd2 Nbd7 10. Qc1 Kh7 11. h4 Rh8 12. Nh2 h5 13. Nf3 Kg8 14. a3 Nf8 15. b4 b6 16. Rb1 Ng4 17. Rb3 Bh6 18. bxc5 bxc5 19. Qb2 Bxd2+ 20. Nxd2 Nd7 21. a4 Ngf6 22. Nf3 Kg7 23. g3 Ba6 24. Nd2 Re8 25. Bf1 Qa5 26. Bd3 Reb8 27. O-O Rxb3 28. Nxb3 Qb4 29. Nb5 Bxb5 30. axb5 a5 31. Qa2 Nb6 32. Nd2 a4 33. Rb1 Qa5 34. f3 Ng8 35. Kf2 Ne7 36. Ke2 f6 37. Ra1 Qc3 38. Rb1 g5 39. Rh1 Rh8 40. Nb1 Qd4 41. hxg5 fxg5 42. Na3 Qc3 43. Nb1 Qb4 44. Na3 h4 45. f4 hxg3 46. Rxh8 Kxh8 47. f5 Qc3 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.04"]
[Round "11"]
[White "Polugaevsky, Lev"]
[Black "Gheorghiu, Florin"]
[Result "1/2-1/2"]
[ECO "A16"]
[EventDate "1971.03.22"]
[PlyCount "35"]

1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nxc3 6. bxc3 Bg7 7. Rb1 Nd7 8. Nf3 O-O 9. O-O c5 10. c4 Qc7 11. d3 Rb8 12. Bf4 e5 13. Bd2 b6 14. Ng5 Bb7 15. Ne4 Qc6 16. Bf3 Qc7 17. Bg2 Qc6 18. Bf3 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.04"]
[Round "11"]
[White "Quinteros, Miguel Angel"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]
[ECO "E18"]
[EventDate "1971.03.22"]
[PlyCount "57"]

1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. c4 e6 5. O-O Be7 6. Nc3 O-O 7. d4 Ne4 8. Nxe4 Bxe4 9. Bf4 d6 10. Qd2 Nd7 11. Qe3 Nf6 12. b4 Qc8 13. Bh3 Re8 14. Nd2 Bf5 15. Bxf5 exf5 16. Qd3 c6 17. Rac1 Qe6 18. Bg5 Rad8 19. e3 Qd7 20. a4 Ne4 21. Bxe7 Qxe7 22. Nxe4 fxe4 23. Qe2 c5 24. bxc5 bxc5 25. dxc5 dxc5 26. Rfd1 Qe6 27. Rxd8 Rxd8 28. Rd1 Rxd1+ 29. Qxd1 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.04"]
[Round "11"]
[White "Schweber, Samuel"]
[Black "Browne, Walter Shawn"]
[Result "1/2-1/2"]
[ECO "B74"]
[EventDate "1971.03.22"]
[PlyCount "144"]

1. d4 c5 2. Nf3 cxd4 3. Nxd4 Nc6 4. e4 g6 5. Be3 Nf6 6. Nc3 Bg7 7. Be2 O-O 8. O-O d6 9. Nb3 Be6 10. Qd2 Re8 11. Nd4 Nxd4 12. Bxd4 a6 13. Rfd1 Rc8 14. a4 Qc7 15. a5 Nd7 16. Bxg7 Kxg7 17. Qd4+ Kg8 18. Qe3 Qc5 19. Rd4 Ne5 20. Qd2 Rc7 21. h3 Rec8 22. Rda4 Bc4 23. Qe1 e6 24. Bxc4 Nxc4 25. Nd1 Qe5 26. b3 Nb2 27. Nxb2 Qxb2 28. R1a2 Qe5 29. Qd2 Rc3 30. Rd4 R8c6 31. Rb4 Kg7 32. Qd1 Rc7 33. Qd4 Kf6 34. f4 Qxd4+ 35. Rxd4 Ke7 36. Rd2 Re3 37. Ra4 Rec3 38. Ra2 f5 39. exf5 gxf5 40. Re2 Kf6 41. Kf2 h5 42. Rd2 Ke7 43. Ke2 e5 44. Kd1 e4 45. Ra4 h4 46. Rad4 Rd7 47. Kc1 Re3 48. Kd1 Ke6 49. Rc4 d5 50. Rc8 d4 51. Re8+ Kf6 52. Rf8+ Kg6 53. Rg8+ Kf6 54. Rf8+ Kg6 55. Rg8+ Kh6 56. Rf8 Rd5 57. Rb8 Rg3 58. Kc1 e3 59. Re2 Rxa5 60. Kb2 Rb5 61. Ka3 Rd5 62. Rxb7 Rd6 63. Kb4 Rdg6 64. Kc4 Rxg2 65. Rxg2 Rxg2 66. Kxd4 Rxc2 67. Kxe3 Rc3+ 68. Kd4 Rxh3 69. Ke5 Rc3 70. Kxf5 h3 71. Kg4 h2 72. Rb6+ Kg7 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.06"]
[Round "12"]
[White "Browne, Walter Shawn"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "B99"]
[EventDate "1971.03.22"]
[PlyCount "114"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Nf6 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 Qe7 16. Nxe6 Bxe6 17. fxe6 g6 18. exf7+ Kxf7 19. Qe2 Kg7 20. Nd5 Qd8 21. Bh3 Ra7 22. Rhf1 Re8 23. Rd4 Rf8 24. Rdd1 Raf7 25. Rxf7+ Rxf7 26. Be6 Rf3 27. Bg4 Rf8 28. Bh3 h5 29. b3 Bh6 30. Rf1 Qg5 31. Nc7 Kh7 32. Bg2 Rxf1+ 33. Qxf1 Qd8 34. Nd5 Qh4 35. h3 Bg7 36. a3 Qg3 37. Qe2 Nc6 38. Qd2 a5 39. Ka2 b4 40. axb4 axb4 41. Kb1 Qe5 42. c3 bxc3 43. Qc2 Qd4 44. Bf1 Qg1 45. Qg2 Qa7 46. Qc2 Be5 47. Bd3 Qg1+ 48. Qc1 Qg3 49. Qf1 Bg7 50. Bc2 Ne5 51. b4 Nf3 52. Qd3 Qg1+ 53. Qd1 Nd2+ 54. Ka2 Qa7+ 55. Ba4 Nxe4 56. Kb3 Nd2+ 57. Ka2 Qd4 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.06"]
[Round "12"]
[White "Gheorghiu, Florin"]
[Black "Mecking, Henrique"]
[Result "1/2-1/2"]
[ECO "E12"]
[EventDate "1971.03.22"]
[PlyCount "39"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. a3 d5 6. cxd5 exd5 7. b4 Be7 8. e3 O-O 9. Be2 Nbd7 10. Qb3 c6 11. O-O Bd6 12. a4 a5 13. Ba3 axb4 14. Bxb4 Qc7 15. Rfb1 Ba6 16. Bxa6 Rxa6 17. Bxd6 Qxd6 18. Qb4 Qxb4 19. Rxb4 Rfa8 20. h3 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.06"]
[Round "12"]
[White "Panno, Oscar"]
[Black "Poch, Caesar G."]
[Result "1-0"]
[ECO "D76"]
[EventDate "1971.03.22"]
[PlyCount "79"]

1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nb6 6. Nf3 Bg7 7. d4 O-O 8. O-O Nc6 9. e3 e5 10. d5 Ne7 11. e4 Nc4 12. b3 Nd6 13. Ba3 a6 14. Qd3 Bd7 15. Rfd1 h6 16. Nd2 f5 17. Nc4 Nec8 18. Rac1 f4 19. Nb1 g5 20. Qc2 Be8 21. Nxd6 cxd6 22. Qc7 Bh5 23. Rd2 Qxc7 24. Rxc7 Rf7 25. Rdc2 Rxc7 26. Rxc7 Rb8 27. Nd2 Bf8 28. Nc4 Na7 29. Nxd6 Bxd6 30. Bxd6 Nb5 31. Rg7+ Kxg7 32. Bxe5+ Kf7 33. Bxb8 Nc3 34. gxf4 gxf4 35. f3 a5 36. a4 Ke7 37. Bc7 Ne2+ 38. Kf2 Nc1 39. Bxa5 Nxb3 40. Bc7 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.06"]
[Round "12"]
[White "Planinc, Albin"]
[Black "Quinteros, Miguel Angel"]
[Result "0-1"]
[ECO "A42"]
[EventDate "1971.03.22"]
[PlyCount "74"]

1. e4 g6 2. d4 Bg7 3. c4 d6 4. Nc3 e5 5. d5 Nd7 6. Nf3 Ne7 7. Be2 a5 8. Be3 f5 9. exf5 Nxf5 10. Bg5 Bf6 11. h4 Nc5 12. Qd2 h6 13. Bxf6 Qxf6 14. O-O-O Ne7 15. g3 Bd7 16. Rdf1 Bg4 17. Nh2 Bxe2 18. Qxe2 Qf5 19. f4 exf4 20. Rf3 g5 21. Rd1 Kd7 22. Qf1 Ng6 23. gxf4 gxf4 24. Ne2 Ne5 25. Nd4 Qe4 26. Qh3+ Kd8 27. Ne6+ Nxe6 28. Qxe6 Re8 29. Qf6+ Kd7 30. Rb3 Qxc4+ 31. Rc3 Qe4 32. Qg7+ Re7 33. Rxc7+ Kxc7 34. Qxe7+ Kb8 35. Qxd6+ Ka7 36. Qc5+ b6 37. Qd4 Rc8+ 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.06"]
[Round "12"]
[White "Rubinetti, Jorge Alberto"]
[Black "Polugaevsky, Lev"]
[Result "0-1"]
[ECO "E31"]
[EventDate "1971.03.22"]
[PlyCount "76"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 c5 5. d5 h6 6. Bh4 d6 7. e3 Bxc3+ 8. bxc3 e5 9. Qc2 Qe7 10. Nf3 Nbd7 11. Nd2 e4 12. Be2 g5 13. Bg3 Nf8 14. h4 Rg8 15. Rb1 Kd8 16. h5 N8d7 17. Rb2 Ne5 18. Nxe4 Bf5 19. Nxf6 Bxc2 20. Nxg8 Qf8 21. Bxe5 dxe5 22. Nxh6 Bh7 23. Ng4 Kc7 24. Kd1 Qd6 25. f3 e4 26. Nf2 exf3 27. gxf3 Re8 28. Nd3 b6 29. e4 f6 30. a4 g4 31. fxg4 Rxe4 32. a5 Qg3 33. axb6+ axb6 34. Nc1 Qxc3 35. Rd2 Rd4 36. Rxd4 Qxd4+ 37. Ke1 Qe3 38. Kd1 Qc3 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.06"]
[Round "12"]
[White "Savon, Vladimir"]
[Black "Brond, Victor"]
[Result "1-0"]
[ECO "E86"]
[EventDate "1971.03.22"]
[PlyCount "51"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. f3 O-O 6. Be3 e5 7. Nge2 c6 8. Qd2 Nbd7 9. O-O-O Qa5 10. Kb1 a6 11. Nc1 Re8 12. dxe5 dxe5 13. Nb3 Qc7 14. c5 Bf8 15. Na4 Be7 16. Qc3 Nf8 17. Nb6 Rb8 18. Nc4 N6d7 19. h4 Ne6 20. Nd6 Rd8 21. Bc4 Ndxc5 22. Nxf7 Kxf7 23. Nxc5 Bxc5 24. Bxc5 Kf6 25. Rxd8 Qxd8 26. f4 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.06"]
[Round "12"]
[White "Schweber, Samuel"]
[Black "Pilnik, Herman"]
[Result "1/2-1/2"]
[ECO "E66"]
[EventDate "1971.03.22"]
[PlyCount "33"]

1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. d4 O-O 5. Bg2 d6 6. O-O Nc6 7. d5 Na5 8. Nfd2 c5 9. Nc3 a6 10. Qc2 Rb8 11. b3 b5 12. Bb2 bxc4 13. bxc4 e5 14. Rab1 Qc7 15. h3 Nh5 16. Ba1 Bd7 17. Rxb8 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.06"]
[Round "12"]
[White "Sumiacher, Carlos"]
[Black "Juarez, Carlos Eleodoro"]
[Result "1-0"]
[ECO "A33"]
[EventDate "1971.03.22"]
[PlyCount "77"]

1. c4 e6 2. g3 c5 3. Bg2 Nc6 4. Nf3 Nf6 5. O-O Be7 6. d4 cxd4 7. Nxd4 O-O 8. Nc3 a6 9. b3 Qc7 10. Bb2 d6 11. Rc1 Bd7 12. Nd5 exd5 13. cxd5 Nxd5 14. Bxd5 Qa5 15. Nxc6 bxc6 16. Bxc6 Bxc6 17. Rxc6 Qxa2 18. Qa1 Qxa1 19. Rxa1 Rfb8 20. Raxa6 Rxa6 21. Rxa6 Rxb3 22. Ba3 Rb1+ 23. Kg2 Ra1 24. Ra8+ Bf8 25. e4 f6 26. f4 Kf7 27. Kf3 g6 28. g4 Bh6 29. Ra7+ Kg8 30. f5 Rf1+ 31. Ke2 Rf4 32. Bc1 Rxg4 33. Bxh6 Rxe4+ 34. Kf3 Re5 35. fxg6 hxg6 36. Rg7+ Kh8 37. Rxg6 Rf5+ 38. Bf4 d5 39. Rg2 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.07"]
[Round "13"]
[White "Brond, Victor"]
[Black "Sumiacher, Carlos"]
[Result "1-0"]
[ECO "E80"]
[EventDate "1971.03.22"]
[PlyCount "79"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 c6 6. Be3 a6 7. Qd2 b5 8. O-O-O Qa5 9. Kb1 Nbd7 10. g4 Nb6 11. c5 b4 12. cxb6 bxc3 13. Qxc3 Qxc3 14. bxc3 Nd7 15. Kc2 Rb8 16. Rb1 Rxb6 17. Rxb6 Nxb6 18. Bd3 Kd8 19. Ne2 Kc7 20. Rb1 Bd7 21. c4 Ra8 22. c5 Nc8 23. Nc3 e5 24. d5 Bf8 25. Bc4 dxc5 26. dxc6 Bxc6 27. Bxf7 Nb6 28. f4 Bd6 29. f5 Rf8 30. Be6 Be7 31. Bh6 Rd8 32. Bg7 Bd6 33. h4 Be8 34. Nd5+ Nxd5 35. Bxd5 Bc6 36. Bxc6 Kxc6 37. fxg6 hxg6 38. h5 gxh5 39. gxh5 Bf8 40. h6 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.07"]
[Round "13"]
[White "Juarez, Carlos Eleodoro"]
[Black "Gheorghiu, Florin"]
[Result "0-1"]
[ECO "B43"]
[EventDate "1971.03.22"]
[PlyCount "66"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be3 Nf6 7. a3 b5 8. Be2 Bb7 9. O-O Nxe4 10. Nxe4 Bxe4 11. Rc1 Nc6 12. Kh1 Nxd4 13. Qxd4 Qb7 14. f3 Bc6 15. c3 f6 16. Rfe1 Be7 17. Bd3 O-O 18. Bb1 Rac8 19. Qh4 g6 20. Rcd1 Rf7 21. Qg3 Kh8 22. Rd4 Rg8 23. Rh4 f5 24. Rh6 Bf6 25. Bf4 Qc8 26. Qf2 Bd5 27. Bd3 Qf8 28. Rh3 g5 29. Be5 g4 30. Rh5 gxf3 31. gxf3 Bxe5 32. Rxe5 Qc5 33. Re3 Rfg7 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.07"]
[Round "13"]
[White "Mecking, Henrique"]
[Black "Rubinetti, Jorge Alberto"]
[Result "1/2-1/2"]
[ECO "C41"]
[EventDate "1971.03.22"]
[PlyCount "114"]

1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. g3 Be7 6. Bg2 O-O 7. O-O c6 8. b3 Re8 9. Bb2 Bf8 10. a4 a5 11. Re1 Qc7 12. h3 b6 13. Qd2 Ba6 14. Rad1 Rac8 15. Nb1 h6 16. c4 g6 17. Nc3 Rcd8 18. Qc2 Bg7 19. Ba3 Nh7 20. Re2 Nhf8 21. Red2 exd4 22. Nxd4 Nc5 23. e5 dxe5 24. Nxc6 Rxd2 25. Rxd2 e4 26. Nd4 e3 27. Rd1 exf2+ 28. Qxf2 Qe5 29. Nd5 Ne4 30. Bxe4 Qxe4 31. Nc6 f5 32. Kh2 Re6 33. Nce7+ Kh7 34. Nc7 Rxe7 35. Bxe7 Qxe7 36. Nxa6 Qb7 37. Rd6 Qxa6 38. Qxb6 Qa8 39. Rd5 Qe8 40. Qf2 Qe4 41. Rxa5 Ne6 42. Ra7 h5 43. Re7 h4 44. gxh4 f4 45. h5 g5 46. Qb2 Qd3 47. h6 Qg3+ 48. Kh1 Qxh3+ 49. Qh2 Qf1+ 50. Qg1 Qf3+ 51. Qg2 Qd1+ 52. Qg1 Qh5+ 53. Qh2 Qd1+ 54. Qg1 Qf3+ 55. Qg2 Qh5+ 56. Qh2 Qd1+ 57. Qg1 Qf3+ 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.07"]
[Round "13"]
[White "Najdorf, Miguel"]
[Black "Panno, Oscar"]
[Result "1-0"]
[ECO "A17"]
[EventDate "1971.03.22"]
[PlyCount "59"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 Bb4 4. Qc2 O-O 5. a3 Bxc3 6. Qxc3 d6 7. g3 e5 8. Bg2 Re8 9. O-O c5 10. d3 Nc6 11. e3 a5 12. b3 Rb8 13. Bb2 b5 14. cxb5 Rxb5 15. Nd2 Ne7 16. f4 Bb7 17. e4 Nc6 18. fxe5 dxe5 19. a4 Rb4 20. Qxc5 Nd7 21. Qf2 f6 22. Bc3 Ba6 23. Bxb4 Nxb4 24. Nc4 Nxd3 25. Qe3 Bxc4 26. bxc4 Qb6 27. Qxb6 Nxb6 28. Rfb1 Nb4 29. c5 Nd7 30. Rc1 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.07"]
[Round "13"]
[White "Pilnik, Herman"]
[Black "Browne, Walter Shawn"]
[Result "1-0"]
[ECO "B14"]
[EventDate "1971.03.22"]
[PlyCount "110"]

1. e4 c5 2. Nf3 g6 3. c3 Bg7 4. d4 cxd4 5. cxd4 d5 6. exd5 Qxd5 7. Nc3 Qd8 8. Bc4 Nf6 9. Ne5 O-O 10. Qb3 e6 11. Be3 Nc6 12. Nxc6 bxc6 13. Be2 Nd5 14. Nxd5 cxd5 15. O-O Qd6 16. g3 Rb8 17. Qc3 Qb6 18. b3 Ba6 19. Bxa6 Qxa6 20. Qd2 Qb6 21. Rac1 a5 22. Rc5 a4 23. bxa4 Qb4 24. Qd1 Ra8 25. a5 Rfb8 26. Qd3 Rxa5 27. Rxa5 Qxa5 28. Rb1 Ra8 29. Qc2 h5 30. Rb2 h4 31. Kg2 Bf6 32. gxh4 Bxh4 33. Qc6 Bf6 34. a4 Rf8 35. Rb7 Qe1 36. Qc2 Kg7 37. Qc6 Kg8 38. Qc2 Qa1 39. Rb1 Qa3 40. Rb7 Qa1 41. Rb1 Qa3 42. Rb7 Qd6 43. Qc5 Qa6 44. Qb5 Qa8 45. a5 e5 46. a6 exd4 47. Bh6 Qc8 48. h3 Qf5 49. Qe2 Bg7 50. a7 Bxh6 51. Rb8 d3 52. Qe7 d2 53. Rxf8+ Bxf8 54. a8=Q Qg5+ 55. Qxg5 d1=Q 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.07"]
[Round "13"]
[White "Poch, Caesar G."]
[Black "Planinc, Albin"]
[Result "0-1"]
[ECO "D91"]
[EventDate "1971.03.22"]
[PlyCount "54"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 d5 5. Bg5 Ne4 6. cxd5 Nxg5 7. Nxg5 e6 8. Nf3 exd5 9. e3 O-O 10. b4 c6 11. Qb3 Be6 12. Be2 Nd7 13. O-O g5 14. Rfd1 Qe7 15. b5 f5 16. Rac1 g4 17. Ne1 f4 18. bxc6 bxc6 19. Na4 Rab8 20. Qc3 g3 21. hxg3 fxg3 22. fxg3 Qg5 23. Nf3 Qxg3 24. Qxc6 Rbe8 25. Qc7 Ne5 26. dxe5 Bh3 27. Bf1 Rxf3 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.07"]
[Round "13"]
[White "Polugaevsky, Lev"]
[Black "Schweber, Samuel"]
[Result "1-0"]
[ECO "D46"]
[EventDate "1971.03.22"]
[PlyCount "77"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 c6 5. e3 Nbd7 6. Bd3 Bd6 7. e4 dxe4 8. Nxe4 Nxe4 9. Bxe4 Bb4+ 10. Bd2 Qa5 11. O-O Bxd2 12. Nxd2 O-O 13. Re1 Nf6 14. Bf3 Rd8 15. Nb3 Qc7 16. Qe2 b6 17. Qe5 Rd7 18. a4 a5 19. c5 Qxe5 20. dxe5 Nd5 21. Bxd5 Rxd5 22. cxb6 Rb8 23. Red1 Rxb6 24. Nxa5 Rxb2 25. Nxc6 Rxd1+ 26. Rxd1 Bd7 27. h3 Be8 28. Rd8 Kf8 29. a5 Ra2 30. Ra8 Rc2 31. Nb4 Rc1+ 32. Kh2 Ra1 33. a6 Ke7 34. Rb8 Kd7 35. Nd3 Ke7 36. Rb7+ Kf8 37. a7 g5 38. Rc7 Bb5 39. Nc5 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.07"]
[Round "13"]
[White "Quinteros, Miguel Angel"]
[Black "Savon, Vladimir"]
[Result "1/2-1/2"]
[ECO "D74"]
[EventDate "1971.03.22"]
[PlyCount "22"]

1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. d4 Nf6 5. O-O O-O 6. c4 c5 7. dxc5 dxc4 8. Qa4 Qd5 9. Nc3 Qxc5 10. Be3 Qh5 11. Qxc4 Nc6 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.08"]
[Round "14"]
[White "Browne, Walter Shawn"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]
[ECO "B09"]
[EventDate "1971.03.22"]
[PlyCount "45"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4 c6 5. Nf3 Bg4 6. Be3 Nf6 7. h3 Bxf3 8. Qxf3 Qa5 9. Bd3 Nbd7 10. O-O O-O 11. a3 Qc7 12. e5 Ne8 13. e6 fxe6 14. Qg4 Rf5 15. Bxf5 exf5 16. Qe2 d5 17. Bf2 Nf8 18. Rae1 e6 19. g3 Nd6 20. Nb1 Re8 21. c3 Nd7 22. Kg2 Nf6 23. Be3 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.08"]
[Round "14"]
[White "Gheorghiu, Florin"]
[Black "Brond, Victor"]
[Result "1-0"]
[ECO "E73"]
[EventDate "1971.03.22"]
[PlyCount "81"]

1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6 6. Be2 Bg7 7. Bg5 h6 8. Bd2 a6 9. h4 h5 10. Nf3 Nbd7 11. g3 Rb8 12. Qc2 Nf8 13. Ng5 Ng4 14. f3 Nh6 15. a4 b6 16. a5 f6 17. Nh3 bxa5 18. Nd1 Bd7 19. Bxa5 Qc8 20. Nhf2 Nh7 21. Nd3 f5 22. b4 O-O 23. bxc5 dxc5 24. N1f2 fxe4 25. Nxe4 Nf5 26. Bc3 Nf6 27. Ndxc5 Nxg3 28. Nxg3 Qxc5 29. Qxg6 Rbe8 30. Rxa6 Nxd5 31. Ra5 Qb6 32. Qxb6 Nxb6 33. Nxh5 Bh8 34. Bb4 Rf5 35. Ng3 Rf7 36. Ne4 Rb8 37. Bd6 Re8 38. Rg1+ Bg7 39. Rxe5 Ra8 40. Reg5 Ra1+ 41. Kf2 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.08"]
[Round "14"]
[White "Pilnik, Herman"]
[Black "Polugaevsky, Lev"]
[Result "1/2-1/2"]
[ECO "B52"]
[EventDate "1971.03.22"]
[PlyCount "41"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. O-O Nc6 6. Re1 Nf6 7. c3 e6 8. d4 cxd4 9. cxd4 d5 10. e5 Ne4 11. Nbd2 Nxd2 12. Bxd2 Be7 13. Rc1 O-O 14. Qb3 Rfc8 15. Rc2 Rc7 16. Rec1 Rac8 17. h3 h6 18. a3 Nb8 19. Rxc7 Rxc7 20. Rxc7 Qxc7 21. Qc3 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.08"]
[Round "14"]
[White "Planinc, Albin"]
[Black "Najdorf, Miguel"]
[Result "1-0"]
[ECO "B42"]
[EventDate "1971.03.22"]
[PlyCount "81"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Bc5 6. Nb3 Ba7 7. Qe2 Nc6 8. c4 d6 9. Nc3 Nge7 10. Be3 Bxe3 11. Qxe3 e5 12. O-O O-O 13. Rfd1 Be6 14. Bf1 Rc8 15. Qd2 Nb8 16. Qxd6 Qxd6 17. Rxd6 Bxc4 18. Bxc4 Rxc4 19. Rb6 Rc7 20. Na5 Nd7 21. Rd6 Nc8 22. Rd2 Ncb6 23. Rad1 f6 24. g3 Kf7 25. Rd6 Re8 26. Kg2 Re6 27. R6d2 Re8 28. h4 h5 29. f4 exf4 30. gxf4 Nf8 31. Rd4 Nc8 32. Kf3 b5 33. a4 bxa4 34. Rxa4 Ne6 35. Rb4 Rd8 36. Nd5 Ne7 37. f5 Nc5 38. Rc4 Nxd5 39. exd5 Ke7 40. b4 Rdc8 41. d6+ 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.08"]
[Round "14"]
[White "Rubinetti, Jorge Alberto"]
[Black "Juarez, Carlos Eleodoro"]
[Result "1-0"]
[ECO "E02"]
[EventDate "1971.03.22"]
[PlyCount "77"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Qa4+ Nbd7 6. Bg2 a6 7. Qxc4 Bd6 8. Bf4 Bxf4 9. gxf4 b5 10. Qc6 Rb8 11. Nbd2 Bb7 12. Qc2 O-O 13. a3 Nd5 14. e3 b4 15. O-O Qe7 16. Rfc1 Rfc8 17. Nb3 Ba8 18. Nc5 Nxc5 19. Qxc5 bxa3 20. bxa3 Rb5 21. Qxe7 Nxe7 22. a4 Rb6 23. Ne5 Bxg2 24. Kxg2 Nd5 25. Kf3 f6 26. a5 Rb5 27. Nc6 Ra8 28. Ra3 f5 29. Ne5 Kf8 30. Rc6 Ke7 31. Ra1 Ra7 32. h4 g6 33. h5 gxh5 34. Rg1 Nb4 35. Rcc1 Kf6 36. Rg8 Rab7 37. Rcg1 c6 38. Rf8+ Ke7 39. Rf7+ 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.08"]
[Round "14"]
[White "Savon, Vladimir"]
[Black "Poch, Caesar G."]
[Result "1-0"]
[ECO "A16"]
[EventDate "1971.03.22"]
[PlyCount "37"]

1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nxc3 6. bxc3 Bg7 7. Rb1 Nd7 8. Nf3 Rb8 9. O-O O-O 10. d4 b6 11. e4 e5 12. Re1 Bb7 13. Qa4 Ra8 14. Bh3 c6 15. Ba3 Re8 16. Qb3 Qc7 17. Ng5 Nf8 18. Bd6 Qxd6 19. Nxf7 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.08"]
[Round "14"]
[White "Schweber, Samuel"]
[Black "Mecking, Henrique"]
[Result "0-1"]
[ECO "B31"]
[EventDate "1971.03.22"]
[PlyCount "86"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. Re1 e5 6. b4 cxb4 7. a3 bxa3 8. Nxa3 Nge7 9. Nc4 O-O 10. Nd6 Qc7 11. Ba3 a6 12. Bf1 b5 13. c3 h6 14. Bc5 Rb8 15. Qc1 Bb7 16. Qa3 Bf6 17. d4 exd4 18. cxd4 Bg7 19. Nxb7 Rxb7 20. d5 b4 21. Qe3 d6 22. dxc6 Nxc6 23. Bd4 Nxd4 24. Nxd4 Qb6 25. Red1 a5 26. Bc4 b3 27. Bd5 b2 28. Rab1 Rc7 29. Ne2 Qxe3 30. fxe3 Rfc8 31. Kf2 a4 32. Nd4 Rc1 33. Ke2 Bxd4 34. exd4 R8c2+ 35. Kd3 Rc3+ 36. Ke2 R3c2+ 37. Kd3 a3 38. Ba2 Rc3+ 39. Ke2 R3c2+ 40. Kf3 Rxd1 41. Rxd1 Rc1 42. Ke2 Ra1 43. Bb1 Rxb1 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.08"]
[Round "14"]
[White "Sumiacher, Carlos"]
[Black "Quinteros, Miguel Angel"]
[Result "0-1"]
[ECO "B41"]
[EventDate "1971.03.22"]
[PlyCount "58"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 g6 6. Nc3 Bg7 7. Be2 d6 8. O-O Ne7 9. Bg5 O-O 10. Qd2 b6 11. Rfd1 Ra7 12. Bg4 Rc7 13. Nb3 Rc6 14. Ne2 h5 15. Bf3 f6 16. Be3 e5 17. c5 bxc5 18. Bxc5 Be6 19. Bxd6 Re8 20. Nc5 Bf7 21. Nc3 Nc8 22. Bxb8 Qxd2 23. Rxd2 Bh6 24. Nd5 Bxd2 25. Rd1 Kg7 26. Rxd2 Rxc5 27. h4 Rd8 28. Kh2 Rd7 29. b4 Rb5 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.10"]
[Round "15"]
[White "Brond, Victor"]
[Black "Rubinetti, Jorge Alberto"]
[Result "1/2-1/2"]
[ECO "A58"]
[EventDate "1971.03.22"]
[PlyCount "101"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. Nf3 g6 8. Nd2 Bg7 9. e4 Bxf1 10. Nxf1 O-O 11. Ne3 Nbd7 12. O-O Qa5 13. Bd2 Qa6 14. Qc2 Rfb8 15. b3 Ne8 16. Rfb1 Nc7 17. a4 Bd4 18. Nc4 Ne5 19. Nxe5 Bxe5 20. Ra2 Rb7 21. g3 Rab8 22. Nd1 Qe2 23. Ne3 Bd4 24. Ba5 Qf3 25. Bxc7 Rxc7 26. Nc4 Ra7 27. Na3 Rb4 28. Qe2 Rxb3 29. Qxf3 Rxf3 30. Nb5 Ra5 31. Nxd4 cxd4 32. Rb5 Rxb5 33. axb5 Rb3 34. Rd2 d3 35. Kg2 f5 36. exf5 gxf5 37. Kf3 Kf7 38. Ke3 Kf6 39. f4 Rxb5 40. Rxd3 Rb2 41. h3 Rh2 42. h4 Ra2 43. Kf3 Ra1 44. Kf2 Ra5 45. Kf3 h5 46. Kf2 e6 47. dxe6 Kxe6 48. Re3+ Kd5 49. Re8 Ra2+ 50. Kf3 Ra3+ 51. Kf2 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.10"]
[Round "15"]
[White "Juarez, Carlos Eleodoro"]
[Black "Schweber, Samuel"]
[Result "0-1"]
[ECO "B28"]
[EventDate "1971.03.22"]
[PlyCount "34"]

1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nde2 Bc5 7. Ng3 Qb6 8. Qf3 d6 9. h3 Nc6 10. Bd3 Nd4 11. Qd1 Nb5 12. Bxb5+ axb5 13. Qe2 b4 14. Nd1 Qa6 15. c4 b3 16. Nc3 Be6 17. Nb5 Qxa2 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.10"]
[Round "15"]
[White "Mecking, Henrique"]
[Black "Pilnik, Herman"]
[Result "1-0"]
[ECO "C90"]
[EventDate "1971.03.22"]
[PlyCount "147"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7 11. h3 Nc6 12. dxc5 dxc5 13. Nbd2 Be6 14. Nh4 g6 15. Nf1 Nd7 16. Nf3 Rd8 17. N3h2 c4 18. Ne3 Nc5 19. Nd5 Qd6 20. Nxe7 Qxe7 21. Qf3 Nd3 22. Rd1 Nxc1 23. Raxc1 O-O 24. Nf1 Kg7 25. Ne3 Qc5 26. b4 cxb3 27. Bxb3 Bxb3 28. axb3 Qe7 29. Ra1 Rxd1+ 30. Qxd1 Nb8 31. Qg4 Kh8 32. b4 Rd8 33. Nd5 Qe6 34. Qg5 Rd6 35. Nc7 Qf6 36. Qxf6+ Rxf6 37. Rd1 Rb6 38. Rd5 f6 39. Rd8+ Kg7 40. Nd5 Rb7 41. Rd6 f5 42. exf5 gxf5 43. Re6 e4 44. Ne3 Rf7 45. Rb6 Nd7 46. Rxa6 f4 47. Nc2 Rf6 48. Ra5 Rd6 49. Nd4 Kf6 50. Rxb5 Ne5 51. Ra5 h5 52. b5 Nc4 53. Ra8 e3 54. fxe3 fxe3 55. Kf1 Ke5 56. Re8+ Kd5 57. Nc2 Rf6+ 58. Kg1 Rb6 59. Nxe3+ Nxe3 60. Rxe3 Rxb5 61. Kf2 Rb8 62. Rg3 Rf8+ 63. Rf3 Rh8 64. g3 Kc4 65. g4 h4 66. g5 Rg8 67. Rf4+ Kxc3 68. Rg4 Kd3 69. Kf3 Rf8+ 70. Rf4 Rh8 71. Kg4 Ke3 72. Rf6 Ke4 73. Rh6 Rf8 74. Rxh4 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.10"]
[Round "15"]
[White "Najdorf, Miguel"]
[Black "Savon, Vladimir"]
[Result "1/2-1/2"]
[ECO "A16"]
[EventDate "1971.03.22"]
[PlyCount "56"]

1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nb6 6. Nf3 Bg7 7. O-O Nc6 8. d3 O-O 9. Bd2 e5 10. Qc1 Qe7 11. Re1 Be6 12. Ne4 Rad8 13. a4 a5 14. Nc5 Bc8 15. Ra3 Nd5 16. Qc4 b6 17. Ne4 Ncb4 18. Qc1 c5 19. Ra1 Bb7 20. h4 Rde8 21. Nc3 Nc7 22. h5 gxh5 23. Na2 Nxa2 24. Rxa2 f5 25. e4 Qf7 26. Ra3 Ne6 27. Qc4 fxe4 28. dxe4 h4 1/2-1/2

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.10"]
[Round "15"]
[White "Panno, Oscar"]
[Black "Planinc, Albin"]
[Result "1-0"]
[ECO "D07"]
[EventDate "1971.03.22"]
[PlyCount "79"]

1. Nf3 Nc6 2. d4 d5 3. c4 Bg4 4. cxd5 Bxf3 5. gxf3 Qxd5 6. e3 e5 7. Nc3 Bb4 8. Bd2 Bxc3 9. bxc3 Qd6 10. Be2 Nge7 11. O-O O-O-O 12. Kh1 g5 13. Rg1 Rdg8 14. Qb3 f5 15. Rad1 exd4 16. cxd4 Rg6 17. Bc1 Rd8 18. d5 Rh6 19. Rg2 Ne5 20. e4 f4 21. Qa3 g4 22. Qxa7 N7g6 23. fxg4 Rh3 24. f3 Nh4 25. Bxf4 Nhxf3 26. Qa8+ Kd7 27. Qxb7 Rf8 28. Bg3 Ke7 29. Bxf3 Rxf3 30. Rc1 Kd7 31. Qb5+ Ke7 32. Qb2 Rhxg3 33. Rxg3 Rxg3 34. hxg3 Nd3 35. Qg7+ Kd8 36. Qh8+ Ke7 37. Qxh7+ Kd8 38. Qh8+ Ke7 39. Rf1 Qxg3 40. Qf8+ 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.10"]
[Round "15"]
[White "Poch, Caesar G."]
[Black "Sumiacher, Carlos"]
[Result "0-1"]
[ECO "B35"]
[EventDate "1971.03.22"]
[PlyCount "110"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 Qa5 8. Bb3 Nxe4 9. O-O Nxc3 10. bxc3 O-O 11. Qd3 b6 12. Nxc6 dxc6 13. Qe4 Qxc3 14. Qxe7 Qe5 15. Qa3 Bf5 16. Rad1 Qc7 17. Qa4 Be5 18. h3 Rad8 19. Bg5 Rxd1 20. Rxd1 c5 21. Re1 Bd7 22. Qh4 Re8 23. Re3 Bb5 24. Bd5 Bg7 25. c4 Rxe3 26. Bxe3 Ba4 27. Bf4 Qd7 28. Bb8 Bd4 29. Qe4 a6 30. h4 Qd8 31. Bg3 Bd7 32. Qf4 Qf6 33. Qc7 Bg4 34. Kh2 Kg7 35. f3 Bf5 36. Bb7 b5 37. Bd5 b4 38. h5 gxh5 39. Kh1 h4 40. Bd6 h3 41. g4 Bd3 42. Qb8 h5 43. gxh5 Kh7 44. Qc7 Qg7 45. Bg3 Bf2 46. Bxf7 Qa1+ 47. Kh2 Qg1+ 48. Kxh3 Qxg3+ 49. Qxg3 Bxg3 50. Kxg3 a5 51. Be8 Bxc4 52. Bg6+ Kh6 53. Bb1 a4 54. Kf4 Bxa2 55. Bg6 Bg8 0-1

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.10"]
[Round "15"]
[White "Polugaevsky, Lev"]
[Black "Browne, Walter Shawn"]
[Result "1-0"]
[ECO "E94"]
[EventDate "1971.03.22"]
[PlyCount "141"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. Be2 O-O 6. Nf3 e5 7. d5 Nbd7 8. O-O Nc5 9. Qc2 a5 10. Bg5 h6 11. Be3 b6 12. Nd2 Ne8 13. f3 f5 14. exf5 gxf5 15. f4 e4 16. Nb3 Nxb3 17. axb3 Bd7 18. Qd2 Nf6 19. Bd4 Kh7 20. Nd1 Qe8 21. Ne3 Qg6 22. Bc3 Rg8 23. Qe1 Bh8 24. Qh4 Raf8 25. h3 Qg3 26. Qxg3 Rxg3 27. Kf2 Rgg8 28. b4 axb4 29. Bxb4 Ra8 30. Bc3 h5 31. g3 Kg6 32. Rg1 Kh6 33. Rxa8 Rxa8 34. g4 fxg4 35. hxg4 Bxg4 36. Bxg4 hxg4 37. f5 Kg5 38. Bd2 Ra2 39. Nxg4+ Kxf5 40. Nh6+ Ke5 41. Bc3+ Kf4 42. Ke2 Ra4 43. Rf1+ Kg3 44. Bxf6 Bxf6 45. Rxf6 Rxc4 46. Nf5+ Kg4 47. Ne3+ Kg5 48. Rf7 Rb4 49. Nd1 Rb5 50. Rxc7 Rxd5 51. Nc3 Rd4 52. Ke3 Rb4 53. Rg7+ Kf5 54. Rg2 Ke5 55. Rd2 Rc4 56. Rd5+ Ke6 57. Rb5 Kd7 58. Rxb6 Kc7 59. Nd5+ Kd7 60. b3 Rc6 61. Rb7+ Ke6 62. Kd4 Rc1 63. Re7+ Kf5 64. Ne3+ Kf4 65. Rxe4+ Kf3 66. Re7 Rb1 67. Kc3 Re1 68. Nf5 Rc1+ 69. Kd2 Rc5 70. Nd4+ Kg4 71. Rg7+ 1-0

[Event "24th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1971.04.10"]
[Round "15"]
[White "Quinteros, Miguel Angel"]
[Black "Gheorghiu, Florin"]
[Result "1/2-1/2"]
[ECO "D75"]
[EventDate "1971.03.22"]
[PlyCount "42"]

1. Nf3 g6 2. g3 Bg7 3. d4 d5 4. Bg2 Nf6 5. O-O O-O 6. c4 c5 7. cxd5 Nxd5 8. dxc5 Na6 9. Ng5 Ndb4 10. Nc3 h6 11. Nf3 Qxd1 12. Rxd1 Be6 13. Ne1 Nxc5 14. Be3 Rac8 15. Nb5 Na4 16. Nxa7 Rcd8 17. a3 Nd5 18. Bd4 Nxb2 19. Bxg7 Kxg7 20. Rdb1 Nc4 21. Rxb7 Nc3 1/2-1/2
