[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.15"]
[Round "1"]
[White "Ader Hausman, Walter"]
[Black "Mangini, Jose Thiago"]
[Result "1/2-1/2"]
[ECO "A18"]
[EventDate "1957.03.15"]
[PlyCount "81"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 Be7 4. e4 d5 5. e5 Ne4 6. d4 O-O 7. Bd3 Nxc3 8. bxc3 dxc4 9. Bxc4 c5 10. O-O b6 11. Qe2 Bb7 12. Rd1 Qc8 13. Bg5 Bxf3 14. Qxf3 Nc6 15. Bf4 cxd4 16. Bb5 Na5 17. cxd4 Qb7 18. Qg4 Rfd8 19. Bd3 g6 20. Bh6 Rac8 21. h4 Bf8 22. Bg5 Be7 23. Be4 Qd7 24. Rd3 Nc6 25. Rad1 Nb4 26. Rh3 h5 27. Qf3 Nd5 28. Bd2 Kg7 29. g4 Rh8 30. Rg3 hxg4 31. Rxg4 Rxh4 32. Rxh4 Bxh4 33. Kg2 Rh8 34. Rh1 Qd8 35. Qh3 f5 36. exf6+ Qxf6 37. Qf3 Qxf3+ 38. Bxf3 Bf6 39. Re1 Rh4 40. Rxe6 Rxd4 41. Bxd5 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.15"]
[Round "1"]
[White "Casas, Fernando"]
[Black "Keres, Paul"]
[Result "0-1"]
[ECO "E48"]
[EventDate "1957.03.15"]
[PlyCount "82"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nge2 d5 7. O-O cxd4 8. exd4 dxc4 9. Bxc4 Nbd7 10. Bb3 Nb6 11. Nf4 Bd7 12. Nd3 Be7 13. Ne5 Rc8 14. Bg5 Bc6 15. Qe2 Bd5 16. Nxd5 Nfxd5 17. Bd2 Qd6 18. Rac1 Bf6 19. Rfd1 Rfd8 20. Qe4 Rxc1 21. Rxc1 Ne7 22. Be3 Nbd5 23. Ng4 Nc6 24. Bc2 g6 25. Nxf6+ Nxf6 26. Qf3 Nd5 27. Bb3 Kg7 28. h4 h5 29. a3 Rd7 30. Rc5 Nce7 31. Ba4 Rc7 32. Rxc7 Qxc7 33. Bd2 Qc4 34. Bb3 Qxd4 35. Bc3 Nxc3 36. Qxc3 Qxc3 37. bxc3 Kf6 38. Kf1 Nd5 39. c4 Nc3 40. Ke1 Ke5 41. Kd2 Kd4 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.15"]
[Round "1"]
[White "Incutto, Carlos"]
[Black "Eliskases, Erich"]
[Result "1/2-1/2"]
[ECO "E69"]
[EventDate "1957.03.15"]
[PlyCount "125"]

1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. Nc3 e5 7. d4 Nbd7 8. e4 c6 9. h3 Qe7 10. d5 c5 11. Bg5 h6 12. Be3 Ne8 13. Qd2 Kh7 14. Ne1 f5 15. Nd3 Nef6 16. Rac1 Nb6 17. exf5 Nxc4 18. fxg6+ Kh8 19. Qe2 Qe8 20. Ne1 Nb6 21. Nf3 Qxg6 22. Rcd1 h5 23. Kh2 Bf5 24. Ne1 e4 25. Bf4 Rad8 26. Nc2 h4 27. Ne3 Bc8 28. Qc2 Rfe8 29. a4 Bh6 30. Bxh6 Qxh6 31. g4 Nbd7 32. Nf5 Qf4+ 33. Kh1 Ne5 34. Qd2 Qxd2 35. Rxd2 Bxf5 36. gxf5 Nf7 37. Re1 Ng5 38. Rde2 Re5 39. Nxe4 Ngxe4 40. Bxe4 Rde8 41. f3 Nh5 42. Re3 Ng3+ 43. Kg2 Nxf5 44. Rb3 b6 45. Kf2 Ng3 46. a5 bxa5 47. Ra1 Nxe4+ 48. fxe4 Rxe4 49. Rxa5 Rd4 50. Rxa7 Rxd5 51. Rbb7 Rf5+ 52. Kg2 Rg5+ 53. Kf3 Rf8+ 54. Ke3 Kg8 55. Rh7 Rb8 56. Rxh4 Rxb2 57. Rg4 Rxg4 58. hxg4 Rb4 59. Rd7 Rd4 60. g5 d5 61. g6 Re4+ 62. Kf3 Rd4 63. Ke3 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.15"]
[Round "1"]
[White "Kotov, Alexander"]
[Black "Esposito, Alfredo H"]
[Result "1-0"]
[ECO "A36"]
[EventDate "1957.03.15"]
[PlyCount "101"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. e4 c5 6. a3 Nc6 7. Rb1 d6 8. b4 Ne8 9. Nge2 Nc7 10. O-O Ne6 11. d3 Rb8 12. Nd5 b6 13. Be3 Bd7 14. Qd2 Ned4 15. Nxd4 Nxd4 16. Bh6 Bh3 17. Bxg7 Kxg7 18. f4 Bxg2 19. Qxg2 e6 20. Ne3 f5 21. Rf2 Qd7 22. Ra2 Rbe8 23. a4 Rb8 24. b5 e5 25. Nd5 fxe4 26. dxe4 Rf7 27. a5 bxa5 28. Rxa5 Qg4 29. h3 Qf3 30. Rba1 Rbb7 31. R1a3 Qd1+ 32. Kh2 Qb1 33. Ra6 Rbd7 34. h4 h5 35. Re3 Qc1 36. Rc3 Qd1 37. Raa3 Qe2 38. Qxe2 Nxe2 39. Re3 Nd4 40. Ra6 Ne6 41. fxe5 Rf2+ 42. Kg1 Rc2 43. Rxd6 Rc1+ 44. Kg2 Rc2+ 45. Kh3 Rf7 46. Rxe6 Rff2 47. g4 Rh2+ 48. Kg3 Rhg2+ 49. Kf4 Rxg4+ 50. Kf3 Rcg2 51. Re2 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.15"]
[Round "1"]
[White "Lombardy, William James"]
[Black "Cuellar Gacharna, Miguel"]
[Result "1/2-1/2"]
[ECO "E65"]
[EventDate "1957.03.15"]
[PlyCount "45"]

1. Nf3 Nf6 2. g3 g6 3. c4 Bg7 4. Bg2 c5 5. d4 O-O 6. O-O d6 7. Nc3 Nc6 8. dxc5 dxc5 9. Bf4 Be6 10. Ne5 Nxe5 11. Bxe5 Nd7 12. Bxg7 Kxg7 13. b3 Qc7 14. Qc1 Rad8 15. Rd1 Nf6 16. Qf4 Qxf4 17. gxf4 b6 18. Bf3 Rd7 19. Rxd7 Bxd7 20. Rd1 Rc8 21. Kg2 Rc7 22. a4 a5 23. e4 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.15"]
[Round "1"]
[White "Panno, Oscar"]
[Black "Behrensen, Jorge"]
[Result "1/2-1/2"]
[ECO "D15"]
[EventDate "1957.03.15"]
[PlyCount "84"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e3 b5 6. a4 b4 7. Na2 e6 8. Bxc4 Be7 9. O-O O-O 10. Qe2 Bb7 11. Rd1 Nbd7 12. Bd2 a5 13. Nc1 Qb6 14. Nb3 c5 15. Rac1 Rac8 16. Be1 Rfd8 17. Bb5 cxd4 18. exd4 Rxc1 19. Rxc1 Ne4 20. Bd3 Nd6 21. Nc5 Bd5 22. Bd2 Nb7 23. Nxd7 Rxd7 24. Ne5 Rc7 25. Bxh7+ Kf8 26. Rxc7 Qxc7 27. Bd3 Bf6 28. Bf4 Qd8 29. Qc2 Nd6 30. h3 Kg8 31. Be3 Qa8 32. f3 Qa7 33. Bf2 g6 34. Kf1 Nf5 35. Bxf5 gxf5 36. Qc8+ Kg7 37. Nd7 Be7 38. Nc5 Bxc5 39. Qxc5 Qxc5 40. dxc5 Bc6 41. b3 Bd5 42. Bd4+ f6 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.15"]
[Round "1"]
[White "Rossetto, Hector Decio"]
[Black "Wexler, Bernardo"]
[Result "1-0"]
[ECO "A65"]
[EventDate "1957.03.15"]
[PlyCount "113"]

1. c4 Nf6 2. Nc3 g6 3. d4 Bg7 4. e4 d6 5. f3 O-O 6. Bg5 c5 7. d5 e6 8. Qd2 exd5 9. cxd5 a6 10. a4 Re8 11. Bc4 Qa5 12. Ra2 Nbd7 13. Nge2 Ne5 14. b3 Nfd7 15. O-O Nxc4 16. bxc4 Ne5 17. f4 Nxc4 18. Qd3 Nb6 19. f5 Nd7 20. f6 Qd8 21. Qf3 Ne5 22. Qf4 Bh8 23. h3 Bd7 24. Qh4 b5 25. Ng3 b4 26. Nd1 c4 27. Qh6 Nd3 28. Ne3 c3 29. Raa1 Re5 30. Rad1 Nb2 31. Rde1 Qf8 32. Qh4 Rc8 33. Nef5 Bxf5 34. Nxf5 Rxf5 35. exf5 Nd3 36. fxg6 hxg6 37. Re3 Ne5 38. Qxb4 Rc4 39. Qb3 Qc8 40. Kh2 c2 41. Ree1 Rc3 42. Qb6 Nd3 43. Qxd6 Nxe1 44. Rxe1 c1=Q 45. Bxc1 Rxc1 46. Re7 Rb1 47. Rxf7 Rb6 48. Rc7 Rxd6 49. Rxc8+ Kf7 50. Rxh8 Rxd5 51. Rb8 Ra5 52. Rb4 Kxf6 53. Kg3 Rg5+ 54. Kf3 Ra5 55. h4 Kg7 56. g4 Kh7 57. Ke4 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.15"]
[Round "1"]
[White "Rubio Aguado, Fernando"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "E95"]
[EventDate "1957.03.15"]
[PlyCount "100"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Nf3 e5 7. O-O Nbd7 8. Re1 c6 9. Bf1 Re8 10. d5 c5 11. g3 Ng4 12. Bh3 Nf8 13. Ng5 Nh6 14. Bxc8 Qxc8 15. Kg2 f6 16. Nh3 Nf7 17. a3 f5 18. Qe2 Nd7 19. f3 Nf6 20. b4 h6 21. Bd2 Qd7 22. Nf2 Rac8 23. Rac1 Rf8 24. Rf1 b6 25. b5 h5 26. Nh3 h4 27. Ng5 Nxg5 28. Bxg5 Nh5 29. a4 hxg3 30. hxg3 f4 31. Bh4 fxg3 32. Bg5 Nf4+ 33. Bxf4 exf4 34. e5 Bxe5 35. Ne4 Qf5 36. Rh1 Kg7 37. Rh4 Rh8 38. Rch1 Rxh4 39. Rxh4 Rh8 40. Rxh8 Kxh8 41. Qf1 Kg7 42. Qh1 Bf6 43. Nxd6 Qc2+ 44. Kh3 Be5 45. Ne4 Qxc4 46. Qd1 Qa2 47. Qd2 Qa1 48. Qg2 Qd4 49. Qe2 Qxd5 50. Nd2 Bf6 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.15"]
[Round "1"]
[White "Sanguineti, Raul"]
[Black "Albert, E."]
[Result "1-0"]
[ECO "C02"]
[EventDate "1957.03.15"]
[PlyCount "87"]

1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3 Nc6 5. Bd3 cxd4 6. O-O Nge7 7. Bf4 Ng6 8. Bg3 Be7 9. Nbd2 Bd7 10. Re1 Rc8 11. a3 a5 12. Rb1 a4 13. Qe2 O-O 14. h4 Bxh4 15. Nxh4 Nxh4 16. Bxh7+ Kxh7 17. Qh5+ Kg8 18. Bxh4 f6 19. exf6 Rxf6 20. Bxf6 Qxf6 21. Nf3 Rf8 22. Qh2 Qg6 23. Ne5 Nxe5 24. Qxe5 Qxc2 25. Qxd4 Qf5 26. Rbc1 Bc6 27. Re5 Qg6 28. Re3 Rf6 29. Rce1 Kf7 30. Qe5 Qf5 31. Qxf5 exf5 32. Re7+ Kg6 33. f4 d4 34. R1e6 d3 35. Kf2 d2 36. Ke2 Bxg2 37. Kxd2 Bc6 38. Kc3 Rxe6 39. Rxe6+ Kh5 40. Kd4 Kg4 41. Ke5 Kh5 42. Rd6 g6 43. Rd1 Be8 44. Rg1 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.16"]
[Round "2"]
[White "Albert, E."]
[Black "Lombardy, William James"]
[Result "0-1"]
[ECO "B96"]
[EventDate "1957.03.15"]
[PlyCount "80"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Bd7 8. Qf3 Nc6 9. O-O-O Nxd4 10. Rxd4 Bc6 11. Be2 Be7 12. Qg3 Qa5 13. Bf3 h6 14. Bh4 e5 15. Rd3 exf4 16. Qxg7 Rh7 17. Bxf6 Rxg7 18. Bxg7 Qg5 19. Bd4 f5 20. Re1 Kf8 21. Re2 Re8 22. exf5 Qxf5 23. Bb6 Bxf3 24. Rxf3 Bg5 25. Rd2 Re1+ 26. Nd1 Qe4 27. Bf2 Rh1 28. Rd4 Qe6 29. h4 Qxa2 30. Ra3 Qe6 31. hxg5 hxg5 32. g3 Qe2 33. gxf4 Qxf2 34. Rad3 g4 35. Rxd6 g3 36. Rd8+ Kf7 37. R8d7+ Kf6 38. R7d6+ Kf5 39. R6d5+ Ke4 40. Rh5 Qxf4+ 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.16"]
[Round "2"]
[White "Behrensen, Jorge"]
[Black "Rubio Aguado, Fernando"]
[Result "1/2-1/2"]
[ECO "E64"]
[EventDate "1957.03.15"]
[PlyCount "70"]

1. d4 Nf6 2. Nf3 c5 3. g3 b6 4. d5 d6 5. Bg2 g6 6. O-O Bg7 7. c4 O-O 8. Nc3 Na6 9. Nd2 Nc7 10. e4 Rb8 11. a4 a6 12. Re1 e5 13. dxe6 Bxe6 14. Nd5 b5 15. axb5 axb5 16. Ra7 Ncxd5 17. cxd5 Qb6 18. Ra2 Bd7 19. h3 Nh5 20. Nf3 Ra8 21. Rxa8 Rxa8 22. g4 Nf6 23. e5 dxe5 24. Nxe5 h6 25. h4 Rd8 26. g5 hxg5 27. hxg5 Nh5 28. Nxd7 Rxd7 29. Re8+ Bf8 30. Qe2 Ng7 31. Re3 Nf5 32. Rh3 Re7 33. Be3 Bg7 34. b4 cxb4 35. Qd3 Nxe3 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.16"]
[Round "2"]
[White "Casas, Fernando"]
[Black "Ader Hausman, Walter"]
[Result "1-0"]
[ECO "D43"]
[EventDate "1957.03.15"]
[PlyCount "95"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 h6 6. Bxf6 Qxf6 7. e3 Nd7 8. Qc2 Bd6 9. Be2 O-O 10. O-O Qe7 11. e4 dxc4 12. e5 Bc7 13. Rfe1 c5 14. Bxc4 cxd4 15. Nb5 Bb6 16. Rad1 a6 17. Nbxd4 Rd8 18. Nxe6 fxe6 19. Rd6 Bxf2+ 20. Qxf2 Nf8 21. Qb6 Re8 22. Red1 Bd7 23. Qxb7 Reb8 24. Qe4 Bb5 25. Bb3 Re8 26. a4 Qa7+ 27. Kh1 Bd7 28. Bc2 Rac8 29. Nh4 Qc5 30. R1d2 Bc6 31. Qe1 Qb4 32. R6d4 Qb7 33. h3 Bd5 34. b4 Rc3 35. Kh2 Qc7 36. Bd1 Nd7 37. Ng6 Nb6 38. Nf4 Ra3 39. a5 Nc4 40. Re2 Qa7 41. Qg1 Qb8 42. Nxd5 exd5 43. Rxd5 Qxb4 44. Qd4 Qc3 45. Qxc3 Rxc3 46. Rc5 Kh8 47. e6 Re7 48. Re4 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.16"]
[Round "2"]
[White "Cuellar Gacharna, Miguel"]
[Black "Kotov, Alexander"]
[Result "0-1"]
[ECO "B06"]
[EventDate "1957.03.15"]
[PlyCount "134"]

1. d4 d6 2. e4 g6 3. g3 Bg7 4. Bg2 Nc6 5. c3 e5 6. Ne2 h5 7. h3 Qf6 8. d5 Nb8 9. c4 h4 10. Nbc3 a5 11. Be3 Bh6 12. Qd2 Na6 13. g4 Bxe3 14. fxe3 Bd7 15. Nc1 Ne7 16. Nd3 Nc8 17. b3 Nc5 18. Rf1 Qe7 19. Nxc5 dxc5 20. d6 Qxd6 21. Qf2 Qe6 22. Nd5 Kd8 23. Qxf7 Qxf7 24. Rxf7 Ra6 25. O-O-O Rd6 26. Rdf1 Re6 27. g5 Nd6 28. Rf8+ Rxf8 29. Rxf8+ Re8 30. Rf6 Be6 31. Nc3 Ke7 32. Rxg6 Rg8 33. Rxg8 Bxg8 34. Kd2 Be6 35. Nd1 Nf7 36. g6 Ng5 37. Nf2 Kf6 38. Ke2 b6 39. Kd3 Kxg6 40. Kc3 Kf6 41. a4 Bf7 42. Kd3 c6 43. Kc3 Ke7 44. Kc2 Kd7 45. Kc3 Kd6 46. Kd2 b5 47. Kc3 bxa4 48. bxa4 Bh5 49. Kd2 Nf3+ 50. Bxf3 Bxf3 51. Ke1 Ke6 52. Kd2 Ke7 53. Ke1 Kf6 54. Kd2 Kg5 55. Ke1 Kf6 56. Kd2 Ke6 57. Kd3 Kd6 58. Kd2 Bh5 59. Kd3 Bf7 60. Kc3 Be6 61. Kb3 Ke7 62. Kc3 Kf6 63. Kd3 Kg5 64. Kc3 Bxh3 65. Nxh3+ Kg4 66. Ng1 Kg3 67. Ne2+ Kg2 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.16"]
[Round "2"]
[White "Esposito, Alfredo H"]
[Black "Rossetto, Hector Decio"]
[Result "1/2-1/2"]
[ECO "E01"]
[EventDate "1957.03.15"]
[PlyCount "40"]

1. c4 Nf6 2. g3 e6 3. Bg2 d5 4. Nf3 Nbd7 5. b3 c6 6. O-O Bd6 7. Bb2 O-O 8. d4 b6 9. Nbd2 Qe7 10. Ne5 Bb7 11. e4 Ba3 12. Bxa3 Qxa3 13. Nxd7 Nxd7 14. Qc1 Qd6 15. Qc3 c5 16. exd5 exd5 17. Rad1 Rac8 18. cxd5 Bxd5 19. dxc5 Rxc5 20. Nc4 Qf6 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.16"]
[Round "2"]
[White "Keres, Paul"]
[Black "Eliskases, Erich"]
[Result "1-0"]
[ECO "C19"]
[EventDate "1957.03.15"]
[PlyCount "81"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Nf3 Nbc6 8. a4 Qc7 9. Qd2 b6 10. Bd3 Bd7 11. O-O c4 12. Be2 Nf5 13. Ba3 h5 14. Rfe1 f6 15. Bf1 O-O-O 16. g3 Kb7 17. Bh3 Rde8 18. Re2 Ka8 19. Rae1 Qc8 20. Bxf5 exf5 21. Nh4 fxe5 22. dxe5 Be6 23. Ng6 Rh6 24. Nf4 Qd7 25. Rd1 Rd8 26. Bd6 Bf7 27. h4 Rxd6 28. exd6 Qxd6 29. Qe3 Qa3 30. Qf3 g6 31. Nxd5 Kb7 32. Re7+ Nxe7 33. Nxe7+ Ka6 34. Rxd8 Qxe7 35. Rd1 Qe6 36. a5 Be8 37. axb6 Bc6 38. Ra1+ Kxb6 39. Qf4 Qe4 40. Qb8+ Bb7 41. Qd6+ 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.16"]
[Round "2"]
[White "Mangini, Jose Thiago"]
[Black "Sanguineti, Raul"]
[Result "0-1"]
[ECO "B85"]
[EventDate "1957.03.15"]
[PlyCount "68"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e6 7. Be3 Be7 8. O-O a6 9. f4 Qc7 10. a4 O-O 11. Bd3 Bd7 12. h3 Na5 13. Qe2 Rac8 14. g4 Nc4 15. Bxc4 Qxc4 16. g5 Qxe2 17. Ndxe2 Nh5 18. Rad1 b5 19. axb5 axb5 20. Rd4 Bc6 21. Nc1 e5 22. Nd5 Bd8 23. Rdd1 exf4 24. Bxf4 Nxf4 25. Rxf4 Bxg5 26. Rf5 Bd8 27. Nc3 g6 28. Rff1 Bb6+ 29. Kh2 Rfe8 30. Rf4 b4 31. N3a2 Be3 32. Rff1 Bb5 33. Nxb4 Bxf1 34. Rxf1 Bxc1 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.16"]
[Round "2"]
[White "Najdorf, Miguel"]
[Black "Incutto, Carlos"]
[Result "1-0"]
[ECO "E62"]
[EventDate "1957.03.15"]
[PlyCount "39"]

1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. d4 d6 5. Bg2 O-O 6. O-O Nc6 7. Nc3 e5 8. d5 Ne7 9. Ne1 Ne8 10. e4 c5 11. Nd3 f5 12. f4 exf4 13. Bxf4 fxe4 14. Nxe4 h6 15. g4 Kh8 16. h3 a6 17. Bd2 b5 18. Rxf8+ Bxf8 19. Bc3+ Kg8 20. Qf3 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.16"]
[Round "2"]
[White "Wexler, Bernardo"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "E62"]
[EventDate "1957.03.15"]
[PlyCount "76"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 d6 6. d4 Nc6 7. O-O Bg4 8. h3 Bxf3 9. Bxf3 Nd7 10. Be3 e5 11. Bxc6 bxc6 12. Rc1 exd4 13. Bxd4 Bh6 14. f4 Re8 15. Qd3 Qb8 16. b3 Bg7 17. Bxg7 Kxg7 18. e4 Qb6+ 19. Kg2 Re7 20. Rfe1 Rae8 21. Re2 a5 22. Rce1 f6 23. h4 Qc5 24. Nb1 a4 25. Qc3 axb3 26. axb3 d5 27. Nd2 d4 28. Qd3 Qd6 29. b4 c5 30. b5 c6 31. Ra1 Rb8 32. Ra6 Rb6 33. Rxb6 Nxb6 34. bxc6 Qxc6 35. Kh2 Na4 36. e5 Nc3 37. Re1 fxe5 38. fxe5 Qe8 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.17"]
[Round "3"]
[White "Ader Hausman, Walter"]
[Black "Keres, Paul"]
[Result "0-1"]
[ECO "E13"]
[EventDate "1957.03.15"]
[PlyCount "64"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. e3 b6 5. Nc3 cxd4 6. exd4 Bb7 7. Bd3 Bb4 8. O-O O-O 9. Bg5 h6 10. Bh4 Be7 11. Qe2 Nc6 12. Rac1 Rc8 13. Rfd1 Re8 14. Bb1 Nh5 15. Bg3 Na5 16. Ne5 Nxg3 17. hxg3 d6 18. b4 dxe5 19. dxe5 Qc7 20. bxa5 Qxc4 21. Bd3 Qb4 22. a6 Bxa6 23. Bxa6 Rxc3 24. Rxc3 Qxc3 25. Rd7 Bc5 26. Bd3 g6 27. Kh2 Re7 28. Rd8+ Kg7 29. Qe4 Rc7 30. f4 Qc1 31. g4 Qg1+ 32. Kh3 Bf2 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.17"]
[Round "3"]
[White "Eliskases, Erich"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "E02"]
[EventDate "1957.03.15"]
[PlyCount "49"]

1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Bd7 6. Qxc4 Bc6 7. O-O Nbd7 8. d4 Nb6 9. Qd3 Be4 10. Qd1 c5 11. dxc5 Bxc5 12. Nc3 Bc6 13. Bg5 h6 14. Bxf6 Qxf6 15. Nd2 Bxg2 16. Kxg2 O-O 17. Nde4 Qf5 18. Nxc5 Qxc5 19. Qb3 Nc4 20. Rfd1 Qc6+ 21. Kg1 Rfd8 22. Rac1 a6 23. Nb1 b5 24. Rxd8+ Rxd8 25. Na3 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.17"]
[Round "3"]
[White "Incutto, Carlos"]
[Black "Behrensen, Jorge"]
[Result "1/2-1/2"]
[ECO "E15"]
[EventDate "1957.03.15"]
[PlyCount "53"]

1. d4 Nf6 2. Nf3 e6 3. c4 b6 4. g3 Ba6 5. Qa4 Be7 6. Bg2 O-O 7. O-O d5 8. Ne5 c6 9. cxd5 cxd5 10. Nc3 Qe8 11. Qd1 Nc6 12. Nxc6 Qxc6 13. Bg5 Rac8 14. Qd2 h6 15. Bxf6 Bxf6 16. Rfc1 Qd7 17. e3 Rc7 18. Rc2 Rfc8 19. Rac1 Be7 20. Ne2 Rxc2 21. Rxc2 Qa4 22. Rxc8+ Bxc8 23. Qc1 Ba6 24. Nc3 Qc6 25. Bf1 Qc8 26. Ne2 Qxc1 27. Nxc1 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.17"]
[Round "3"]
[White "Kotov, Alexander"]
[Black "Albert, E."]
[Result "1-0"]
[ECO "A28"]
[EventDate "1957.03.15"]
[PlyCount "97"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Be7 5. d4 d6 6. d5 Nb8 7. e4 O-O 8. h3 c6 9. Be3 cxd5 10. cxd5 Nbd7 11. Nd2 Ne8 12. Nc4 Bg5 13. Qd2 Bxe3 14. Qxe3 a5 15. Be2 b6 16. O-O Nc5 17. f4 exf4 18. Rxf4 f6 19. Nb5 Ba6 20. Nd4 Qc7 21. Rc1 g5 22. Rf2 Ng7 23. Nd2 Bxe2 24. Qxe2 Rae8 25. Qb5 Qd8 26. Nc6 Qc7 27. Qc4 Nh5 28. Rf3 Nf4 29. Rcf1 Rf7 30. Kh2 Qc8 31. Nd4 Qd8 32. Nf5 Kh8 33. Qd4 Re5 34. Nh6 Rf8 35. Ng4 h5 36. Nxe5 fxe5 37. Qc3 h4 38. a3 a4 39. Qb4 Qc7 40. Nc4 Rb8 41. Ne3 Rg8 42. Ng4 Rg7 43. Rc1 Qd8 44. Rc4 b5 45. Qxb5 Rb7 46. Qc6 Rb6 47. Rxc5 Rxc6 48. Rxc6 Ne2 49. Rf7 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.17"]
[Round "3"]
[White "Lombardy, William James"]
[Black "Mangini, Jose Thiago"]
[Result "1-0"]
[ECO "E52"]
[EventDate "1957.03.15"]
[PlyCount "77"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 d5 5. Nf3 O-O 6. Bd3 b6 7. O-O Bb7 8. a3 Bxc3 9. bxc3 Nbd7 10. cxd5 exd5 11. Nd2 c5 12. Bb2 c4 13. Bc2 b5 14. a4 a6 15. Re1 Re8 16. f3 Qc7 17. Ba3 Nb6 18. axb5 axb5 19. Nf1 Ra6 20. Bb4 Rxa1 21. Qxa1 Bc6 22. Ng3 g6 23. Qc1 Qb7 24. e4 dxe4 25. Nf5 exf3 26. Rxe8+ Nxe8 27. Qh6 Nd7 28. Ne7+ Kh8 29. Bxg6 f2+ 30. Kxf2 Nef6 31. Bf5 Bxg2 32. Qf4 Nh5 33. Qg4 Ndf6 34. Qxg2 Qa7 35. Qf3 Qa1 36. Kg2 Qc1 37. Bd6 Qd2+ 38. Kh3 b4 39. cxb4 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.17"]
[Round "3"]
[White "Panno, Oscar"]
[Black "Esposito, Alfredo H"]
[Result "1/2-1/2"]
[ECO "D53"]
[EventDate "1957.03.15"]
[PlyCount "113"]

1. c4 e6 2. d4 d5 3. Nf3 Nf6 4. Nc3 Be7 5. Bg5 h6 6. Bh4 O-O 7. Rc1 b6 8. Bxf6 Bxf6 9. cxd5 exd5 10. g3 Be6 11. Bg2 c5 12. O-O Nc6 13. e3 Rc8 14. Qa4 Qd7 15. dxc5 bxc5 16. Rfd1 Rfd8 17. Ne4 Bxb2 18. Nxc5 Qe7 19. Nxe6 Qxe6 20. Rc2 Bf6 21. Rdc1 Ne7 22. Qxa7 Ra8 23. Qc7 Rd7 24. Qf4 Rda7 25. Nd4 Qd7 26. Bf1 Ng6 27. Qf5 Qxf5 28. Nxf5 Rxa2 29. Rxa2 Rxa2 30. Rd1 Ra5 31. Bg2 Ne7 32. Nxe7+ Bxe7 33. Bxd5 g6 34. Kg2 Kg7 35. Kf3 h5 36. Bb3 Ra7 37. Rd3 Bf6 38. h3 Rb7 39. Kg2 Rc7 40. Ba4 Rc4 41. Bd1 Rc8 42. Rb3 Rc7 43. Rb5 Re7 44. Bxh5 gxh5 45. Rxh5 Rc7 46. g4 Rc2 47. h4 Be7 48. Kg3 Rc1 49. Kg2 Rc2 50. Kf3 Rc3 51. Ke4 Rc4+ 52. Kf3 Rc3 53. Kf4 Bd6+ 54. Ke4 Be7 55. Kf3 Ra3 56. Kg3 Ra1 57. Kg2 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.17"]
[Round "3"]
[White "Rossetto, Hector Decio"]
[Black "Cuellar Gacharna, Miguel"]
[Result "0-1"]
[ECO "E86"]
[EventDate "1957.03.15"]
[PlyCount "120"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. f3 e5 6. Nge2 c6 7. Be3 O-O 8. Qd2 exd4 9. Nxd4 d5 10. e5 Ne8 11. cxd5 cxd5 12. f4 f6 13. Nf3 fxe5 14. fxe5 Nc7 15. O-O-O Nc6 16. Bg5 Qe8 17. Nxd5 Nxd5 18. Bc4 Kh8 19. Qxd5 Bf5 20. Rhe1 Rc8 21. b3 Nb4 22. Qxb7 Nd3+ 23. Kd2 Nxe1 24. Rxe1 Be6 25. Bb5 Rb8 26. Qxg7+ Kxg7 27. Bxe8 Rfxe8 28. Bf6+ Kg8 29. Nd4 Bd5 30. g4 a6 31. h4 Rbc8 32. h5 Rc7 33. Re2 Rd7 34. Ke3 Be6 35. Rg2 Kf7 36. h6 Rc8 37. Bg7 Rc3+ 38. Ke4 Bd5+ 39. Kf4 Bxg2 40. e6+ Ke7 41. exd7 Kxd7 42. Bf8 Rc1 43. Kg5 Rf1 44. Bc5 Bd5 45. a3 Ke8 46. b4 Kf7 47. a4 Re1 48. a5 Re5+ 49. Kf4 Re4+ 50. Kg3 Be6 51. Kf3 Bd5 52. Kg3 Kf6 53. b5 axb5 54. Nxb5 Kg5 55. Nc7 Rxg4+ 56. Kf2 Bc6 57. Be3+ Kf5 58. a6 Rg2+ 59. Ke1 Ra2 60. a7 g5 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.17"]
[Round "3"]
[White "Rubio Aguado, Fernando"]
[Black "Wexler, Bernardo"]
[Result "0-1"]
[ECO "E97"]
[EventDate "1957.03.15"]
[PlyCount "112"]

1. d4 Nf6 2. c4 d6 3. Nf3 g6 4. Nc3 Bg7 5. e4 O-O 6. Be2 Bg4 7. O-O e5 8. Be3 Nc6 9. d5 Ne7 10. b4 Bxf3 11. Bxf3 Ne8 12. Be2 f5 13. f3 f4 14. Bf2 g5 15. c5 Rf7 16. Rc1 Bf8 17. Nb5 a6 18. Na3 Kh8 19. cxd6 Nxd6 20. Nc4 Nxc4 21. Rxc4 Ng8 22. a4 Nf6 23. Qc2 Bd6 24. Rc1 Kg7 25. b5 axb5 26. axb5 b6 27. Be1 Nd7 28. Rxc7 Bxc7 29. Qxc7 Qxc7 30. Rxc7 Nc5 31. Rc6 Ra2 32. Bf1 Rc2 33. Bf2 Ra7 34. Bxc5 bxc5 35. Ra6 Rxa6 36. bxa6 Kf8 37. d6 Rd2 38. Bc4 Rxd6 39. Kf2 Rd2+ 40. Ke1 Rc2 41. Bd5 Rc1+ 42. Kd2 Ra1 43. Bb7 Ke7 44. Kc3 Kd6 45. Kc4 Rc1+ 46. Kb5 Rb1+ 47. Kc4 Rb4+ 48. Kc3 Kc7 49. Bd5 Kb6 50. Bc4 h5 51. Bd3 Rd4 52. Bc4 Rd1 53. Be2 Rg1 54. a7 Kxa7 55. Kc4 Rxg2 56. Bd3 Rd2 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.17"]
[Round "3"]
[White "Sanguineti, Raul"]
[Black "Casas, Fernando"]
[Result "0-1"]
[ECO "A14"]
[EventDate "1957.03.15"]
[PlyCount "82"]

1. c4 Nf6 2. g3 c6 3. b3 d5 4. Nf3 e6 5. Bg2 Be7 6. Bb2 O-O 7. O-O a5 8. Nc3 d4 9. Na4 c5 10. e3 Nc6 11. Ba3 Nb4 12. exd4 cxd4 13. Bb2 Nc6 14. Re1 Ne8 15. Bh3 Rb8 16. Rc1 b6 17. d3 Nc7 18. Re4 Bf6 19. Bg2 Re8 20. Re1 Na6 21. Ba3 Ncb4 22. Ra1 Bb7 23. Nb2 Bc6 24. Qd2 Qc7 25. Re2 Rbd8 26. Ne1 Bxg2 27. Kxg2 Qc6+ 28. f3 Be7 29. Qc1 Bf8 30. Nd1 f5 31. Nf2 e5 32. Qd1 Nc5 33. Kg1 g6 34. Bc1 e4 35. fxe4 fxe4 36. Nxe4 Nxe4 37. Rxe4 Rxe4 38. dxe4 Qxe4 39. Bd2 d3 40. Nf3 Bc5+ 41. Kg2 Nc2 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.19"]
[Round "4"]
[White "Ader Hausman, Walter"]
[Black "Sanguineti, Raul"]
[Result "0-1"]
[ECO "E91"]
[EventDate "1957.03.15"]
[PlyCount "98"]

1. c4 c5 2. Nc3 Nf6 3. Nf3 g6 4. d4 Bg7 5. e4 O-O 6. Be2 d6 7. O-O Bg4 8. d5 e5 9. Ne1 Bd7 10. Nd3 Qe7 11. Bg5 h6 12. Be3 Na6 13. a3 Nc7 14. f3 b6 15. b4 Nfe8 16. a4 a5 17. bxa5 bxa5 18. Qd2 Kh7 19. Nb5 Qd8 20. Nxc5 dxc5 21. Bxc5 Na6 22. Be3 f5 23. c5 Nf6 24. Nd6 Qc7 25. Rfc1 fxe4 26. fxe4 Bg4 27. Bd3 Nb4 28. Bb1 Nh5 29. Bd3 Nxd3 30. Qxd3 Nf4 31. Bxf4 exf4 32. Rab1 Rab8 33. Nb5 Qe5 34. d6 f3 35. c6 Bh3 36. c7 Rb6 37. d7 Qg5 38. g3 Bxd7 39. Qxd7 Qe3+ 40. Kh1 Qxe4 41. h4 Rbf6 42. Nc3 Qe5 43. Nd5 Qxg3 44. Nxf6+ Rxf6 45. Rb2 Rf4 46. Rh2 Rxh4 47. Qd2 f2 48. Rxh4 Qf3+ 49. Kh2 Be5+ 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.19"]
[Round "4"]
[White "Albert, E."]
[Black "Rossetto, Hector Decio"]
[Result "1-0"]
[ECO "D25"]
[EventDate "1957.03.15"]
[PlyCount "55"]

1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 g6 5. Bxc4 Bg7 6. O-O O-O 7. Nc3 Nfd7 8. Qe2 Nb6 9. Bb3 Nc6 10. Rd1 a5 11. d5 Ne5 12. Nxe5 Bxe5 13. a4 Bd7 14. e4 Qe8 15. Bh6 Bg7 16. Bxg7 Kxg7 17. Qe3 Nc8 18. e5 e6 19. Ne4 Nb6 20. Nf6 Qe7 21. d6 Qd8 22. dxc7 Qxc7 23. Ng4 Rg8 24. Qh6+ Kh8 25. Rd3 f5 26. exf6 Bc8 27. Rc1 Qf7 28. Ne5 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.19"]
[Round "4"]
[White "Behrensen, Jorge"]
[Black "Eliskases, Erich"]
[Result "1/2-1/2"]
[ECO "E68"]
[EventDate "1957.03.15"]
[PlyCount "82"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nbd7 7. Qc2 c6 8. e4 e5 9. Rd1 Qc7 10. Nc3 b5 11. cxb5 cxb5 12. Qe2 a6 13. Bg5 h6 14. Be3 Bb7 15. Rac1 Qb8 16. dxe5 dxe5 17. Nd2 Rd8 18. b4 Nf8 19. Nb3 Ne6 20. Nd5 Kh7 21. Nb6 Bxe4 22. Rxd8 Qxd8 23. Bxe4 Nxe4 24. Nxa8 Qxa8 25. Qf3 f5 26. Nd2 Nd4 27. Bxd4 exd4 28. Re1 Qd5 29. Nxe4 fxe4 30. Qxe4 Qxa2 31. h4 h5 32. g4 hxg4 33. Qxg4 Qf7 34. Re6 Bf8 35. Rxa6 d3 36. Qd4 Qf5 37. Ra7+ Kg8 38. Rd7 d2 39. Qd5+ Qxd5 40. Rxd5 Bxb4 41. Kf1 Bc3 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.19"]
[Round "4"]
[White "Casas, Fernando"]
[Black "Lombardy, William James"]
[Result "1-0"]
[ECO "E59"]
[EventDate "1957.03.15"]
[PlyCount "81"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Bxc3 9. bxc3 dxc4 10. Bxc4 Qc7 11. Bb2 e5 12. h3 e4 13. Nd2 Na5 14. Ba2 c4 15. f3 Qc6 16. Bb1 Qb5 17. Ra2 Qg5 18. fxe4 Bxh3 19. Qf3 Be6 20. a4 Rfe8 21. Ba3 Rad8 22. Qf4 Qxf4 23. exf4 Nb3 24. d5 Bd7 25. e5 Nxd5 26. Nxc4 Nxc3 27. Rb2 Bxa4 28. Nd6 Re7 29. Bc2 Nd4 30. Bxa4 Nxa4 31. Rb4 Nc3 32. Rc4 Ncb5 33. Nxb5 Red7 34. Nxa7 Ne2+ 35. Kh2 g5 36. fxg5 Rd4 37. Rxd4 Rxd4 38. g3 Nc3 39. Bc5 Rd5 40. Bd6 Ne4 41. Nc8 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.19"]
[Round "4"]
[White "Cuellar Gacharna, Miguel"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "D77"]
[EventDate "1957.03.15"]
[PlyCount "114"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. d4 d5 5. c4 dxc4 6. O-O O-O 7. Na3 Nc6 8. Nxc4 Be6 9. b3 a5 10. Bb2 Bd5 11. Qc1 Qc8 12. Rd1 a4 13. Nfe5 Bxg2 14. Kxg2 Qe6 15. Nxc6 Qxc6+ 16. Kg1 axb3 17. axb3 Rxa1 18. Bxa1 Ra8 19. Qb1 Qe6 20. Ne3 c6 21. Qb2 h5 22. h4 Ne4 23. Nf1 Qf5 24. f3 Nd6 25. Kg2 Nb5 26. Qd2 c5 27. Ne3 Qd7 28. Nc4 Ra6 29. e3 cxd4 30. Bxd4 Nxd4 31. exd4 b5 32. Ne5 Qd5 33. Qc2 Ra3 34. Nc6 Bf6 35. Rd3 Kg7 36. Re3 e6 37. Qb2 Ra8 38. Ne5 Rd8 39. Re4 Rc8 40. Re2 Rd8 41. Re4 Rc8 42. g4 hxg4 43. Nxg4 Bxh4 44. Re5 Qd6 45. Qd2 Rh8 46. Qc3 b4 47. Qa1 Rh5 48. Qa7 Bf6 49. Nxf6 Kxf6 50. Rxh5 gxh5 51. Qa8 Qd5 52. Qb8 Qxb3 53. Qd8+ Kf5 54. Qh8 Qd5 55. Qg7 Kf4 56. Qg3+ Ke3 57. Qe1+ Kd3 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.19"]
[Round "4"]
[White "Esposito, Alfredo H"]
[Black "Rubio Aguado, Fernando"]
[Result "1-0"]
[ECO "A05"]
[EventDate "1957.03.15"]
[PlyCount "79"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d3 c5 6. e4 d6 7. Nbd2 Nc6 8. a4 e5 9. Nc4 b6 10. c3 Ne8 11. Ne1 Bb7 12. f4 f5 13. Nf3 Nc7 14. exf5 Rxf5 15. Qb3 Kh8 16. Bd2 Qg8 17. Qc2 Rd8 18. Rae1 Ba6 19. Nh4 Ne7 20. Nxf5 gxf5 21. fxe5 dxe5 22. Nxe5 Bxe5 23. Rxe5 Bxd3 24. Qc1 Bxf1 25. Bxf1 Ng6 26. Rxf5 Qe6 27. Rf2 Nd5 28. c4 Nb4 29. Bc3+ Kg8 30. Qh6 Rd7 31. Rd2 Nc6 32. Re2 Qf7 33. Rf2 Qe6 34. Bd3 Nce5 35. Bf5 Rd1+ 36. Kg2 Qc6+ 37. Kh3 Rd4 38. Bxg6 Nxg6 39. Rf8+ Nxf8 40. Qxc6 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.19"]
[Round "4"]
[White "Keres, Paul"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "B66"]
[EventDate "1957.03.15"]
[PlyCount "56"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8. O-O-O h6 9. Bf4 Bd7 10. Nxc6 Bxc6 11. f3 d5 12. Qe1 Be7 13. exd5 exd5 14. Bd3 O-O 15. Qf2 Re8 16. Be3 Bd6 17. Ne2 Nd7 18. Nd4 Ne5 19. Nf5 Bc7 20. Kb1 Bd7 21. g4 Nxd3 22. Rxd3 Bxf5 23. gxf5 Be5 24. f4 Bf6 25. Rhd1 Qe7 26. Bb6 Qe4 27. Rxd5 Rac8 28. a3 Qc4 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.19"]
[Round "4"]
[White "Mangini, Jose Thiago"]
[Black "Kotov, Alexander"]
[Result "0-1"]
[ECO "B40"]
[EventDate "1957.03.15"]
[PlyCount "57"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Bd3 Nc6 6. c3 e5 7. Nc2 d5 8. exd5 Nxd5 9. O-O Be6 10. Qf3 Bd6 11. Ne3 Nxe3 12. Bxe3 O-O 13. Nd2 f5 14. Bc4 Qe7 15. Bxe6+ Qxe6 16. b4 e4 17. Qe2 Qe5 18. Qc4+ Kh8 19. g3 Rac8 20. Rfd1 Qf6 21. Qb3 Be5 22. Nc4 f4 23. Bc5 e3 24. Bxf8 exf2+ 25. Kg2 Rxf8 26. Rd3 fxg3 27. Nd2 gxh2 28. Nf1 Qg6+ 29. Rg3 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.19"]
[Round "4"]
[White "Wexler, Bernardo"]
[Black "Incutto, Carlos"]
[Result "0-1"]
[ECO "B88"]
[EventDate "1957.03.15"]
[PlyCount "58"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. O-O Be7 8. a3 a6 9. Ba2 Qc7 10. Kh1 Bd7 11. f4 Nxd4 12. Qxd4 O-O 13. e5 Ne8 14. Bd2 Bc6 15. Qe3 Rd8 16. Rad1 g6 17. Ne2 Ng7 18. exd6 Qxd6 19. Ng3 Qd4 20. Qxd4 Rxd4 21. Bb4 Rxd1 22. Rxd1 Rd8 23. Rxd8+ Bxd8 24. Bd6 h5 25. Ne2 Nf5 26. Bc5 Nh4 27. Kg1 Nxg2 28. Kf2 Bc7 29. Nd4 Be4 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.20"]
[Round "5"]
[White "Eliskases, Erich"]
[Black "Wexler, Bernardo"]
[Result "1/2-1/2"]
[ECO "E63"]
[EventDate "1957.03.15"]
[PlyCount "35"]

1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nc6 7. Nc3 a6 8. h3 Rb8 9. Be3 b5 10. cxb5 axb5 11. Qc1 b4 12. Nb1 Na5 13. Bh6 Ba6 14. Bxg7 Kxg7 15. Re1 c5 16. dxc5 Rc8 17. Nbd2 Rxc5 18. Qd1 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.20"]
[Round "5"]
[White "Incutto, Carlos"]
[Black "Esposito, Alfredo H"]
[Result "1-0"]
[ECO "D32"]
[EventDate "1957.03.15"]
[PlyCount "141"]

1. d4 Nf6 2. Nf3 e6 3. c4 c5 4. e3 d5 5. Nc3 Nc6 6. cxd5 exd5 7. Bd3 Bg4 8. Be2 Bd6 9. dxc5 Bxc5 10. O-O O-O 11. a3 Re8 12. b4 Bd6 13. Nb5 Bb8 14. Bb2 a6 15. Nbd4 Qd6 16. g3 Bh3 17. Re1 Ne5 18. Nxe5 Qxe5 19. Rb1 Qe7 20. Bf3 Ba7 21. Ne2 Bf5 22. Ra1 Be4 23. Nf4 Rad8 24. Bg2 h6 25. Rc1 Bxg2 26. Nxg2 Ne4 27. Qg4 Qg5 28. Qxg5 Nxg5 29. Nh4 Rd7 30. Red1 Kh7 31. Kg2 Bb6 32. Nf3 Ne6 33. Ne5 Rde7 34. Rxd5 Rc7 35. Rxc7 Bxc7 36. Nxf7 Re7 37. Ne5 Ng5 38. f4 Ne4 39. Rd7 Rxd7 40. Nxd7 Nd2 41. Nf8+ Kg8 42. Ne6 Nc4 43. Nxc7 Nxb2 44. Nd5 Kf7 45. Kf3 Nc4 46. a4 a5 47. bxa5 Nxa5 48. f5 Nb3 49. e4 Nc5 50. Nc3 Kf6 51. Kf4 Nd3+ 52. Ke3 Ne5 53. h4 g6 54. Nd5+ Kf7 55. Kd4 Nf3+ 56. Kc5 Nd2 57. fxg6+ Kxg6 58. Nf4+ Kf6 59. Kd5 Nf1 60. e5+ Ke7 61. Ne2 Nd2 62. Nd4 Nb1 63. Nf5+ Ke8 64. Kd6 Nc3 65. e6 Ne4+ 66. Ke5 Nc5 67. a5 h5 68. Kd5 Nb3 69. Kd6 Kf8 70. e7+ Kf7 71. Ng7 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.20"]
[Round "5"]
[White "Kotov, Alexander"]
[Black "Casas, Fernando"]
[Result "1-0"]
[ECO "A60"]
[EventDate "1957.03.15"]
[PlyCount "65"]

1. d4 Nf6 2. c4 c5 3. d5 e5 4. dxe6 fxe6 5. Bg5 Be7 6. Nc3 O-O 7. e3 b6 8. Nf3 Bb7 9. Bd3 d6 10. Qc2 Nbd7 11. Bxf6 Nxf6 12. Ng5 Qc8 13. Bxh7+ Kh8 14. O-O-O a6 15. Bg6 Ng4 16. Bh5 Bxg5 17. Bxg4 Be7 18. Nd5 Bxd5 19. cxd5 Qc7 20. dxe6 Rf6 21. Rd5 Raf8 22. f4 c4 23. Rh5+ Rh6 24. Qg6 Rf6 25. Qe8+ Bf8 26. Qd7 Qxd7 27. exd7 Be7 28. Rxh6+ Rxh6 29. e4 Kg8 30. Rd1 Bd8 31. a4 Kf8 32. h3 Rf6 33. g3 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.20"]
[Round "5"]
[White "Lombardy, William James"]
[Black "Ader Hausman, Walter"]
[Result "1-0"]
[ECO "A96"]
[EventDate "1957.03.15"]
[PlyCount "85"]

1. Nf3 e6 2. g3 f5 3. Bg2 Nf6 4. O-O Be7 5. d4 O-O 6. b3 d6 7. Bb2 Qe8 8. Nbd2 Nc6 9. c4 Bd8 10. Re1 Qg6 11. e3 Qh6 12. e4 f4 13. e5 Ne8 14. Ne4 Ne7 15. exd6 cxd6 16. Ba3 Nf5 17. c5 d5 18. Nd6 Be7 19. Nxe8 Rxe8 20. Bc1 g5 21. Ne5 fxg3 22. hxg3 Qg7 23. b4 Bf6 24. Bb2 Bd7 25. a4 Rf8 26. Qb3 Be8 27. Qd3 Rd8 28. b5 h5 29. a5 h4 30. a6 hxg3 31. fxg3 g4 32. axb7 Qxb7 33. c6 Qc7 34. Ra6 Bg5 35. Ba3 Nd6 36. Bc5 Qg7 37. Rxa7 Qh6 38. Nxg4 Qh5 39. Rxe6 Nf5 40. Nf2 Ng7 41. Rxg7+ Kxg7 42. Bxf8+ Kxf8 43. Qf5+ 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.20"]
[Round "5"]
[White "Najdorf, Miguel"]
[Black "Behrensen, Jorge"]
[Result "1-0"]
[ECO "E66"]
[EventDate "1957.03.15"]
[PlyCount "85"]

1. c4 Nf6 2. g3 c5 3. Bg2 g6 4. Nf3 Nc6 5. O-O Bg7 6. d4 O-O 7. Nc3 d6 8. d5 Na5 9. Nd2 Rb8 10. a3 Ne8 11. Qc2 b6 12. b4 Nb7 13. Bb2 cxb4 14. axb4 a5 15. Nb5 Bd7 16. Nd4 axb4 17. Qb3 Na5 18. Qxb4 Nc7 19. Bc3 Na6 20. Qa3 Nc5 21. e3 Ra8 22. Rfb1 Qc7 23. Bf1 Rfb8 24. Qc1 Qc8 25. Qc2 Qe8 26. Nb5 Rc8 27. Bxg7 Kxg7 28. Nd4 Rab8 29. Rb4 Kg8 30. h4 h5 31. N2f3 Qd8 32. Ng5 b5 33. Nde6 Bxe6 34. dxe6 f5 35. Qb2 Qc7 36. cxb5 Qb6 37. Rb1 Rf8 38. Qd4 Rf6 39. Bg2 Nab7 40. Ra1 Nd8 41. Bd5 Kg7 42. Qc4 Rc8 43. Qa2 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.20"]
[Round "5"]
[White "Panno, Oscar"]
[Black "Albert, E."]
[Result "1-0"]
[ECO "E55"]
[EventDate "1957.03.15"]
[PlyCount "77"]

1. c4 e6 2. Nf3 Nf6 3. Nc3 d5 4. d4 Bb4 5. e3 O-O 6. Bd3 dxc4 7. Bxc4 c5 8. O-O Nbd7 9. Qe2 cxd4 10. exd4 a6 11. a4 Nb6 12. Bb3 Nbd5 13. Bd2 Be7 14. Rfe1 b6 15. Rad1 Bb7 16. Ne5 Rc8 17. Ba2 Rc7 18. Bb1 Qa8 19. f3 Qc8 20. Ne4 Re8 21. Qf2 Nh5 22. g4 Nhf4 23. Qg3 Ng6 24. g5 Nb4 25. Bc3 Nd5 26. Bd2 Nb4 27. Nxg6 hxg6 28. Bf4 Rc6 29. Be5 Rd8 30. Qh4 Rd5 31. Nc3 Rd7 32. Re4 Rxc3 33. Bxg7 f5 34. gxf6 Rc1 35. Ree1 Rxd1 36. Rxd1 Bxf6 37. Bxf6 Nd5 38. Qh8+ Kf7 39. Qg7+ 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.20"]
[Round "5"]
[White "Rossetto, Hector Decio"]
[Black "Mangini, Jose Thiago"]
[Result "1-0"]
[ECO "A18"]
[EventDate "1957.03.15"]
[PlyCount "69"]

1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. bxc3 Qxf6 7. d4 Nd7 8. Nf3 h6 9. Bd3 Bd6 10. O-O c5 11. Nd2 O-O 12. Ne4 Qe7 13. Re1 Bc7 14. Qf3 b6 15. Ng3 Rb8 16. Nh5 Bb7 17. Qg4 g5 18. h4 Bd8 19. hxg5 hxg5 20. Bf4 Rc8 21. Qg3 f5 22. d5 Qf7 23. Bxg5 Qxh5 24. Bxd8+ Kh8 25. Bc7 Rg8 26. Be5+ Kh7 27. Qh2 Qxh2+ 28. Bxh2 Rg5 29. Rxe6 Rcg8 30. Re7+ R8g7 31. Rxg7+ Kxg7 32. Re1 Kf8 33. Bd6+ Kg8 34. Re8+ Kf7 35. Re7+ 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.20"]
[Round "5"]
[White "Rubio Aguado, Fernando"]
[Black "Cuellar Gacharna, Miguel"]
[Result "0-1"]
[ECO "E29"]
[EventDate "1957.03.15"]
[PlyCount "64"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3 O-O 7. Bd3 Nc6 8. Ne2 b6 9. e4 Ne8 10. Ng3 d6 11. Be3 f5 12. f4 Qh4 13. O-O Nf6 14. Kh1 Ng4 15. Bg1 cxd4 16. exf5 Rf6 17. Be2 exf5 18. cxd4 Bd7 19. Rf3 Re8 20. Nf1 Rfe6 21. Ra2 Re4 22. Rd2 Qh6 23. d5 Na5 24. h3 Nxc4 25. Bxc4 Rxc4 26. Bd4 Qh4 27. Kg1 Re1 28. Qb3 Rcc1 29. Bb2 Rb1 30. Qc3 Rxf1+ 31. Rxf1 Rxf1+ 32. Kxf1 Bb5+ 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.20"]
[Round "5"]
[White "Sanguineti, Raul"]
[Black "Keres, Paul"]
[Result "1/2-1/2"]
[ECO "A37"]
[EventDate "1957.03.15"]
[PlyCount "72"]

1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. c4 Bg7 5. Nc3 d6 6. d3 a6 7. Bd2 Rb8 8. a4 Bd7 9. Rb1 Nh6 10. h4 Nf5 11. h5 Nfd4 12. Nxd4 cxd4 13. Nd5 e6 14. Nb4 g5 15. h6 Bf6 16. Nxc6 bxc6 17. b4 O-O 18. e4 dxe3 19. Bxe3 Bc3+ 20. Bd2 Bxd2+ 21. Qxd2 f5 22. f4 gxf4 23. gxf4 e5 24. fxe5 dxe5 25. Rh5 Kh8 26. Qg5 Rg8 27. Qxd8 Rbxd8 28. Kf2 e4 29. Bf1 exd3 30. Bxd3 Be6 31. Bf1 Rg4 32. b5 axb5 33. axb5 cxb5 34. cxb5 Rf4+ 35. Kg3 Rg4+ 36. Kf2 Rf4+ 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.21"]
[Round "6"]
[White "Ader Hausman, Walter"]
[Black "Kotov, Alexander"]
[Result "0-1"]
[ECO "B06"]
[EventDate "1957.03.15"]
[PlyCount "70"]

1. d4 d6 2. e4 g6 3. f4 Bg7 4. Nf3 c5 5. dxc5 Qa5+ 6. Nbd2 Qxc5 7. Nb3 Qc7 8. Bd3 Nf6 9. Qe2 O-O 10. O-O Nc6 11. Kh1 a6 12. c3 b5 13. Bd2 e5 14. fxe5 dxe5 15. Be3 Nh5 16. Qf2 Rb8 17. Rad1 Rd8 18. Rd2 f5 19. Bc2 f4 20. Bc5 Be6 21. Ng5 Bc4 22. Rfd1 Bf6 23. Bd6 Rxd6 24. Rxd6 Bxg5 25. Qc5 Rc8 26. Rd7 Qb8 27. Qa3 b4 28. cxb4 Qxb4 29. Nd2 Qxa3 30. bxa3 Be2 31. Bb3+ Kh8 32. Rc1 f3 33. gxf3 Bxf3+ 34. Kg1 Be3+ 35. Kf1 Bg4 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.21"]
[Round "6"]
[White "Albert, E."]
[Black "Rubio Aguado, Fernando"]
[Result "1-0"]
[ECO "B66"]
[EventDate "1957.03.15"]
[PlyCount "111"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O a6 9. f4 Qc7 10. Nf3 b5 11. Bxf6 gxf6 12. Bd3 Bd7 13. Rhe1 h5 14. Qe2 Nb4 15. a3 Nxd3+ 16. Rxd3 a5 17. Nd5 exd5 18. exd5 Bg4 19. Re3 O-O 20. Rxe7 Qc5 21. h3 Bf5 22. Nh4 Bh7 23. Rd1 b4 24. a4 b3 25. c3 Bc2 26. Rd4 Rac8 27. Kd2 Bg6 28. Nxg6 Qxd4+ 29. cxd4 Rc2+ 30. Kd3 Rxe2 31. Rxe2 fxg6 32. Kc3 Rb8 33. Re6 Kf7 34. Rxd6 Rb4 35. Rd7+ Ke8 36. Rg7 Rxa4 37. Rxg6 Kf7 38. Rh6 Rb4 39. Rxh5 Rb6 40. d6 a4 41. Ra5 Rc6+ 42. Kd3 Rc2 43. g4 Ke6 44. Rxa4 Rxb2 45. Rb4 Kxd6 46. Ke4 Rb1 47. Kf5 b2 48. Kxf6 Rf1 49. Rxb2 Rxf4+ 50. Kg6 Rxd4 51. Re2 Ra4 52. Kh5 Ra3 53. h4 Rg3 54. g5 Rg1 55. Kh6 Rg4 56. h5 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.21"]
[Round "6"]
[White "Casas, Fernando"]
[Black "Rossetto, Hector Decio"]
[Result "0-1"]
[ECO "A56"]
[EventDate "1957.03.15"]
[PlyCount "66"]

1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 Be7 6. Be2 O-O 7. Nf3 Ne8 8. Qc2 a6 9. Be3 Nd7 10. O-O g6 11. Bd3 Ng7 12. Bh6 Nf6 13. Ne1 Ng4 14. Bd2 Bg5 15. Be2 f5 16. Bxg4 fxg4 17. g3 Bxd2 18. Qxd2 b5 19. cxb5 axb5 20. b4 cxb4 21. Nxb5 Qa5 22. Nxd6 Ba6 23. a4 Bxf1 24. Kxf1 Qc5 25. Nb7 Qb6 26. Nd3 Qxb7 27. Nxb4 Rxa4 28. Rxa4 Qb5+ 29. Qe2 Qxa4 30. Nc6 h5 31. Kg2 Qa1 32. d6 Qc3 33. Qa2+ Kh7 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.21"]
[Round "6"]
[White "Cuellar Gacharna, Miguel"]
[Black "Incutto, Carlos"]
[Result "1-0"]
[ECO "D35"]
[EventDate "1957.03.15"]
[PlyCount "71"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. cxd5 exd5 6. Bg5 Be7 7. e3 Nf8 8. Bd3 Ne6 9. Bh4 O-O 10. O-O c6 11. Qb1 g6 12. b4 Ne4 13. Bxe7 Nxc3 14. Bxd8 Nxb1 15. Bf6 Na3 16. Ne5 Ng7 17. g4 Re8 18. Rac1 a5 19. bxa5 Rxa5 20. h3 Re6 21. Bd8 Ra8 22. f4 Nc4 23. Bxc4 dxc4 24. Rxc4 Re8 25. Bf6 Rxa2 26. e4 Re6 27. Bh4 f6 28. f5 gxf5 29. gxf5 Rd6 30. Ng4 Nh5 31. e5 fxe5 32. dxe5 Rd3 33. f6 Be6 34. f7+ Bxf7 35. Nh6+ Kg7 36. Nxf7 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.21"]
[Round "6"]
[White "Esposito, Alfredo H"]
[Black "Eliskases, Erich"]
[Result "1/2-1/2"]
[ECO "A13"]
[EventDate "1957.03.15"]
[PlyCount "69"]

1. c4 Nf6 2. g3 e6 3. Bg2 d5 4. Nf3 dxc4 5. O-O c6 6. Qc2 b5 7. b3 cxb3 8. axb3 Bb7 9. d4 Qb6 10. Bb2 c5 11. Nbd2 Nbd7 12. e4 cxd4 13. e5 Nd5 14. Bxd4 Bc5 15. Bb2 Nb4 16. Qb1 f5 17. exf6 Nxf6 18. Ne5 O-O 19. Bxb7 Qxb7 20. Ndf3 Ne4 21. Qd1 Nd5 22. Rc1 b4 23. Rc4 Nb6 24. Rc2 Rad8 25. Qe2 Rc8 26. Bd4 Rfd8 27. Bxc5 Rxc5 28. Rxc5 Nxc5 29. Qc2 Ne4 30. Re1 Nf6 31. Nc6 Rd6 32. Nfe5 Nbd5 33. Qc5 Qc7 34. Qxa7 Qxa7 35. Nxa7 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.21"]
[Round "6"]
[White "Keres, Paul"]
[Black "Behrensen, Jorge"]
[Result "1-0"]
[ECO "B99"]
[EventDate "1957.03.15"]
[PlyCount "57"]

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. Be2 h6 11. Bh4 b5 12. a3 Bb7 13. Qe3 Rc8 14. Kb1 O-O 15. Rhg1 Nc5 16. e5 dxe5 17. fxe5 Nd5 18. Nxd5 Bxd5 19. Bxe7 Qxe7 20. Nf5 exf5 21. Rxd5 Rfd8 22. Rgd1 Rxd5 23. Rxd5 Ne4 24. Bd3 Qh4 25. h3 Re8 26. Ka2 Re6 27. g4 Nf6 28. Rd4 fxg4 29. exf6 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.21"]
[Round "6"]
[White "Mangini, Jose Thiago"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "B59"]
[EventDate "1957.03.15"]
[PlyCount "112"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O 9. Be3 a5 10. a3 Be6 11. f4 a4 12. Nc1 exf4 13. Rxf4 Nd7 14. Rf1 Nde5 15. Nd5 Bxd5 16. Qxd5 Bg5 17. Qd2 Bxe3+ 18. Qxe3 Qa5 19. Na2 Qc5 20. Qxc5 dxc5 21. Rad1 Nd4 22. Rd2 Rfd8 23. Kf2 Kf8 24. Nc3 Rd6 25. Nd5 Nxe2 26. Rxe2 Nc4 27. c3 Re8 28. Ke1 Nxb2 29. Rxb2 Rxd5 30. Rxb7 Rxe4+ 31. Kf2 Rd3 32. Rc1 g6 33. Rc7 Rc4 34. Ra7 Kg7 35. Ke2 Rd6 36. Rf1 Re4+ 37. Kf3 Re5 38. Kg4 h5+ 39. Kh3 Re3+ 40. g3 Rf6 41. Rxf6 Kxf6 42. Rxa4 Rxc3 43. Kh4 Kf5 44. Rf4+ Ke6 45. Ra4 Kd5 46. Kg5 Rf3 47. Ra8 Rf5+ 48. Kh6 c4 49. a4 c3 50. Rc8 Kd4 51. Kg7 Rc5 52. Rd8+ Kc4 53. Rd1 Rc7 54. a5 c2 55. Ra1 Kb3 56. a6 Ra7 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.21"]
[Round "6"]
[White "Sanguineti, Raul"]
[Black "Lombardy, William James"]
[Result "0-1"]
[ECO "C97"]
[EventDate "1957.03.15"]
[PlyCount "78"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. h3 d6 9. c3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Bd7 13. Nf1 Nc4 14. Qe2 Ne8 15. a4 Nf6 16. b3 Na5 17. Ne3 Be6 18. dxe5 dxe5 19. c4 bxc4 20. bxc4 Nd7 21. Nd5 Qd8 22. Bd2 Nc6 23. a5 Rb8 24. Ba4 Nd4 25. Qd3 Bd6 26. Rab1 h6 27. Bxd7 Rxb1 28. Rxb1 Qxd7 29. Nxd4 exd4 30. Rb6 Ra8 31. Bf4 Bxf4 32. Nxf4 Qa4 33. Qg3 Qxc4 34. Kh2 Qc3 35. f3 d3 36. Nh5 d2 37. e5 g5 38. h4 d1=Q 39. hxg5 Qde1 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.21"]
[Round "6"]
[White "Wexler, Bernardo"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "E69"]
[EventDate "1957.03.15"]
[PlyCount "74"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 d6 6. O-O e5 7. d4 Nbd7 8. h3 c6 9. e4 Qb6 10. Re1 exd4 11. Qxd4 Nc5 12. Qd2 Be6 13. Bf1 d5 14. cxd5 cxd5 15. exd5 Rad8 16. Qc2 Nxd5 17. Nxd5 Bxd5 18. Be3 Qxb2 19. Qxc5 Bxf3 20. Qxa7 Ra8 21. Qc5 Rfc8 22. Qe7 Bf6 23. Qd6 Be5 24. Qe7 Re8 25. Qh4 Bd5 26. a4 Bf6 27. Qf4 Be5 28. Qh4 Bc3 29. Reb1 Qc2 30. Rc1 Qf5 31. Qf4 Qxf4 32. Bxf4 Bxa1 33. Rxa1 Bc6 34. a5 Rad8 35. Rc1 Re6 36. Bc4 Re4 37. Be3 Rxc4 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.24"]
[Round "7"]
[White "Behrensen, Jorge"]
[Black "Wexler, Bernardo"]
[Result "1/2-1/2"]
[ECO "A26"]
[EventDate "1957.03.15"]
[PlyCount "96"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. Nc3 Nc6 7. d3 e5 8. Rb1 a5 9. a3 h6 10. b4 axb4 11. axb4 Be6 12. e4 Qd7 13. Nd5 Kh7 14. b5 Ne7 15. b6 Bxd5 16. exd5 c6 17. dxc6 Nxc6 18. Re1 Rfe8 19. Bb2 Ra5 20. Ba1 Qd8 21. Qb3 Nd7 22. c5 Nxc5 23. Qxf7 Rf8 24. Qd5 Qf6 25. Rf1 Ra4 26. Ne1 Qd8 27. f4 e4 28. Bxg7 Ne7 29. Qxc5 dxc5 30. Bxf8 Qxf8 31. dxe4 Qd8 32. f5 Ng8 33. Nf3 Rb4 34. Rbd1 Qe7 35. fxg6+ Kxg6 36. Nh4+ Kh7 37. Nf5 Qe8 38. Nd6 Qe5 39. Rd5 Qc3 40. Rf7+ Kg6 41. h4 Nf6 42. Rf5 Qd4+ 43. Kh2 Qxd6 44. e5 Ng4+ 45. Kh3 Nf2+ 46. Kh2 Ng4+ 47. Kh3 Nf2+ 48. Kh2 Ng4+ 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.24"]
[Round "7"]
[White "Eliskases, Erich"]
[Black "Cuellar Gacharna, Miguel"]
[Result "1/2-1/2"]
[ECO "A31"]
[EventDate "1957.03.15"]
[PlyCount "50"]

1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 a6 6. Nc2 e5 7. g3 Bc5 8. Bg2 d6 9. O-O Be6 10. Nd5 Bxd5 11. Bxd5 Nxd5 12. Qxd5 Qc7 13. Be3 Ne7 14. Qd3 O-O 15. b4 Bxe3 16. Nxe3 Rfd8 17. Nd5 Nxd5 18. Qxd5 Qc6 19. Rfd1 Rac8 20. Rac1 Qxd5 21. Rxd5 f6 22. c5 dxc5 23. Rcxc5 b6 24. Rxd8+ Rxd8 25. Rc6 Rd2 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.24"]
[Round "7"]
[White "Incutto, Carlos"]
[Black "Albert, E."]
[Result "1-0"]
[ECO "E69"]
[EventDate "1957.03.15"]
[PlyCount "83"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. c4 Nbd7 7. Nc3 e5 8. e4 Re8 9. Re1 c6 10. h3 a5 11. Be3 a4 12. dxe5 Nxe5 13. Nxe5 dxe5 14. Qc2 Qa5 15. Rab1 Bf8 16. Bd2 Qa6 17. Bf1 Nd7 18. b4 axb3 19. axb3 Nc5 20. Rb2 Bd7 21. Be3 b6 22. b4 Ne6 23. b5 Qa3 24. Rb3 Qa5 25. bxc6 Bxc6 26. Bxb6 Qa6 27. Be3 Rec8 28. Rd1 Kh8 29. Qb1 Nc5 30. Rb6 Qa5 31. Nd5 Na4 32. Rxc6 Rxc6 33. Qb7 Qa6 34. Qxf7 Bg7 35. Nc7 Rf6 36. Qd7 Qb7 37. Nxa8 Qxa8 38. Qe7 Rf8 39. Rd7 Rg8 40. Bh6 Qf8 41. Bxg7+ Qxg7 42. Qe6 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.24"]
[Round "7"]
[White "Kotov, Alexander"]
[Black "Sanguineti, Raul"]
[Result "0-1"]
[ECO "E16"]
[EventDate "1957.03.15"]
[PlyCount "140"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Be7 7. Nc3 d5 8. Ne5 O-O 9. O-O c6 10. Bf4 Nfd7 11. cxd5 cxd5 12. Ng4 f5 13. Ne5 Nxe5 14. Bxe5 Nc6 15. Bf4 Rc8 16. Rc1 a6 17. h4 Na5 18. b3 b5 19. Nb1 Qb6 20. Qd2 Nc6 21. e3 Na7 22. Rxc8 Rxc8 23. Rc1 b4 24. Rxc8+ Bxc8 25. Qc2 Bd7 26. Bf1 Qb7 27. Qc7 Qxc7 28. Bxc7 Bb5 29. Bb6 Bxf1 30. Kxf1 Nb5 31. Ke2 Kf7 32. Kd3 Ke8 33. Nd2 Nc3 34. Kc2 Kd7 35. Ba5 Nxa2 36. Nb1 Kc6 37. Kb2 Kb5 38. Bc7 Nc3 39. Nxc3+ bxc3+ 40. Kxc3 Bb4+ 41. Kc2 Be1 42. f3 g6 43. Bd6 Bb4 44. Bf4 Be7 45. Kc3 Bd8 46. Kc2 Kb4 47. Bd6+ Ka5 48. Bf4 Kb5 49. Kc3 Be7 50. Be5 g5 51. h5 g4 52. fxg4 fxg4 53. Bf4 Bf8 54. Kc2 Kb4 55. Kb2 Be7 56. Kc2 Ka3 57. Kc3 Ka2 58. Kc2 Bf8 59. e4 dxe4 60. Kc3 a5 61. Kc2 Bb4 62. Be3 Bd6 63. Bf2 Bc7 64. Kc3 e3 65. Bxe3 Bxg3 66. Bd2 Bd6 67. Kc4 g3 68. d5 exd5+ 69. Kxd5 Bb4 70. Bf4 g2 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.24"]
[Round "7"]
[White "Lombardy, William James"]
[Black "Keres, Paul"]
[Result "0-1"]
[ECO "E45"]
[EventDate "1957.03.15"]
[PlyCount "81"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Ba6 6. a3 Be7 7. Nf4 d5 8. cxd5 Bxf1 9. dxe6 Ba6 10. exf7+ Kxf7 11. e4 c5 12. Be3 Nc6 13. Qb3+ c4 14. Qd1 Bd6 15. e5 Nxe5 16. dxe5 Bxe5 17. Nfd5 Re8 18. Nxf6 Qxf6 19. O-O Bb7 20. Qg4 Qe6 21. Qxe6+ Rxe6 22. Rad1 Bc6 23. Bd4 Bc7 24. f3 b5 25. Rfe1 Rxe1+ 26. Rxe1 a5 27. Ne4 h6 28. Bf2 Re8 29. Bd4 b4 30. axb4 axb4 31. Bc5 Bxe4 32. fxe4 Be5 33. Rc1 c3 34. bxc3 Bxc3 35. Rf1+ Ke6 36. Rb1 Rb8 37. Kf2 b3 38. Ke2 b2 39. Kd3 Be5 40. g3 Rd8+ 41. Ke3 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.24"]
[Round "7"]
[White "Najdorf, Miguel"]
[Black "Esposito, Alfredo H"]
[Result "1-0"]
[ECO "E74"]
[EventDate "1957.03.15"]
[PlyCount "81"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 a6 8. a4 Qa5 9. Bd2 e6 10. Nf3 exd5 11. cxd5 Bg4 12. O-O Qc7 13. Be3 Bxf3 14. Bxf3 Nbd7 15. Qc2 Rab8 16. Be2 Ne8 17. f4 Qd8 18. Rad1 Nc7 19. Bg4 b5 20. e5 dxe5 21. Bxd7 Qxd7 22. Bxc5 Rfd8 23. f5 b4 24. Ne4 Nxd5 25. fxg6 hxg6 26. Qb3 Qc6 27. Bd6 Rxd6 28. Nxd6 Qxd6 29. Rxd5 Qb6+ 30. Kh1 Qe6 31. Qd1 e4 32. Rd6 Qc4 33. b3 Qc3 34. Qd5 Rf8 35. Qxe4 Qxb3 36. Rxa6 Qc3 37. Rc6 Qa3 38. Qc4 b3 39. Rxg6 b2 40. Rg3 Qd6 41. Qc3 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.24"]
[Round "7"]
[White "Panno, Oscar"]
[Black "Casas, Fernando"]
[Result "1-0"]
[ECO "E50"]
[EventDate "1957.03.15"]
[PlyCount "83"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 Bb4 5. e3 O-O 6. Be2 c5 7. O-O b6 8. dxc5 bxc5 9. Na4 Qe7 10. cxd5 exd5 11. a3 Ba5 12. Nxc5 Qxc5 13. b4 Qe7 14. bxa5 Ba6 15. Bd2 Rd8 16. Bb4 Qe4 17. Rc1 Bxe2 18. Qxe2 Nbd7 19. Bd6 Qe6 20. Rc6 Ne4 21. Nd4 Qe8 22. Bc7 Ne5 23. Rcc1 Rdc8 24. Bxe5 Qxe5 25. Qa6 Re8 26. Rc2 h5 27. Qd3 Nd6 28. Nc6 Qe6 29. Rd1 Nc4 30. Qxd5 Nxa3 31. Rc3 Qxd5 32. Rxd5 Nb1 33. Rc1 Na3 34. Rxh5 a6 35. Rhc5 Nb5 36. h4 Re4 37. R1c4 Rxc4 38. Rxc4 Kf8 39. Nb4 Ra7 40. Rc6 Nc7 41. g4 Ke7 42. Rxc7+ 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.24"]
[Round "7"]
[White "Rossetto, Hector Decio"]
[Black "Ader Hausman, Walter"]
[Result "1-0"]
[ECO "A34"]
[EventDate "1957.03.15"]
[PlyCount "82"]

1. c4 Nf6 2. Nc3 e6 3. e4 c5 4. Nf3 Nc6 5. d3 d5 6. Bf4 a6 7. Be2 d4 8. Nb1 Be7 9. O-O O-O 10. Ne5 Nxe5 11. Bxe5 Nd7 12. Bg3 f5 13. exf5 exf5 14. f4 Bd6 15. Bf3 Qc7 16. Na3 Nf6 17. Nc2 Bd7 18. a3 Rae8 19. b4 b6 20. bxc5 bxc5 21. Rb1 Bc8 22. Qc1 Kh8 23. Qb2 Ng4 24. Qb6 Ne3 25. Nxe3 Rxe3 26. Rfd1 h6 27. Bf2 Qe7 28. Rb2 Re6 29. Bd5 Bc7 30. Qb3 Rb6 31. Qxb6 Bxb6 32. Rxb6 Qc7 33. Rc6 Qa5 34. Rb1 Qxa3 35. h3 Bd7 36. Rc7 Qxd3 37. Rbb7 Qd1+ 38. Kh2 Qe2 39. Bh4 Qh5 40. Be7 Rc8 41. Rxd7 Qe8 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.24"]
[Round "7"]
[White "Rubio Aguado, Fernando"]
[Black "Mangini, Jose Thiago"]
[Result "1-0"]
[ECO "D37"]
[EventDate "1957.03.15"]
[PlyCount "93"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. e3 Be7 5. Nf3 b6 6. cxd5 exd5 7. Bb5+ c6 8. Bd3 Bg4 9. Bd2 O-O 10. Qc2 Bxf3 11. gxf3 c5 12. Ne2 Nbd7 13. O-O Rc8 14. Rac1 Bd6 15. Bc3 c4 16. Bf5 g6 17. Bh3 Re8 18. Bg2 Qe7 19. Rce1 Qf8 20. e4 dxe4 21. fxe4 Bxh2+ 22. Kxh2 Qh6+ 23. Bh3 Rxe4 24. Bd2 Qh4 25. f3 Re7 26. Ng3 Rxe1 27. Rxe1 Qxd4 28. Bg5 Rc7 29. Qd2 Qxd2+ 30. Bxd2 Nd5 31. Ne4 f5 32. Nd6 N7f6 33. Bf1 Rc6 34. Nxc4 b5 35. Ne3 Nc7 36. Rc1 Rd6 37. Bb4 Rd7 38. Ba5 Ne6 39. Rc6 Re7 40. Bb4 Re8 41. Bc3 f4 42. Ng4 Nd5 43. Nf6+ Nxf6 44. Bxf6 Kf7 45. Bc3 b4 46. Bxb4 Nd4 47. Bc4+ 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.25"]
[Round "8"]
[White "Ader Hausman, Walter"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]
[ECO "B68"]
[EventDate "1957.03.15"]
[PlyCount "129"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O a6 9. f4 Qc7 10. f5 Ne5 11. Nf3 Bd7 12. fxe6 fxe6 13. Be2 O-O-O 14. h3 Kb8 15. Bh4 Nxf3 16. Bxf3 Nxe4 17. Nxe4 Bxh4 18. Qxd6 Bc8 19. Qxc7+ Kxc7 20. Rxd8 Bxd8 21. Rf1 Rf8 22. Be2 Rf5 23. g4 Rxf1+ 24. Bxf1 Kc6 25. c4 Be7 26. Kc2 h6 27. Kd3 b6 28. Bg2 Kc7 29. Bf3 Bd7 30. b3 Ba3 31. Kc3 a5 32. Kc2 Bc6 33. Kd3 Bb4 34. Be2 Be8 35. Bf3 Ba3 36. Be2 Bg6 37. Bf3 Kc6 38. Bd1 Bb2 39. Bf3 Kc7 40. Bd1 Be8 41. Bf3 g5 42. Kc2 Ba3 43. Kd3 Bc6 44. Kd4 Bb2+ 45. Kd3 b5 46. Bd1 a4 47. Bc2 bxc4+ 48. bxc4 Kb6 49. Kd2 Ka5 50. Nc5 Kb4 51. Nd3+ Ka3 52. Nc5 e5 53. Be4 Be8 54. Ne6 Kb4 55. c5 Bd7 56. c6 Bxe6 57. c7 Bc8 58. Bf5 Bc3+ 59. Ke2 Bb7 60. Be4 Ba6+ 61. Bd3 Bc8 62. Bf5 Bd4 63. Bxc8 Bb6 64. Kd3 Bxc7 65. Bd7 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.25"]
[Round "8"]
[White "Albert, E."]
[Black "Eliskases, Erich"]
[Result "1/2-1/2"]
[ECO "E15"]
[EventDate "1957.03.15"]
[PlyCount "31"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Qa4 Be7 6. Bg2 c6 7. Nc3 O-O 8. O-O d5 9. cxd5 cxd5 10. Ne5 Qe8 11. Qxe8 Rxe8 12. Rd1 Bb7 13. Bd2 Nc6 14. Nxc6 Bxc6 15. Rdc1 Rac8 16. a4 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.25"]
[Round "8"]
[White "Casas, Fernando"]
[Black "Rubio Aguado, Fernando"]
[Result "1-0"]
[ECO "A75"]
[EventDate "1957.03.15"]
[PlyCount "81"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Be2 Bg7 8. Nf3 O-O 9. Bf4 Bg4 10. Nd2 Bxe2 11. Qxe2 Nh5 12. Be3 Nd7 13. O-O a6 14. a4 Nhf6 15. Bf4 Ne8 16. Bg3 f5 17. exf5 Rxf5 18. Qe6+ Kh8 19. Qe2 Ne5 20. Kh1 Nc7 21. Nde4 Qd7 22. Bxe5 Bxe5 23. f4 Bxc3 24. bxc3 Nxd5 25. Qd2 Raf8 26. Ng3 Ne7 27. Nxf5 Rxf5 28. Rae1 Rf7 29. Rf3 d5 30. Qe3 d4 31. Qe5+ Kg8 32. Qxc5 d3 33. Qc4 d2 34. Rd1 b5 35. axb5 axb5 36. Qe2 Nf5 37. Rxd2 Re7 38. Rxd7 Rxe2 39. g3 Ne3 40. Kg1 Rg2+ 41. Kh1 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.25"]
[Round "8"]
[White "Cuellar Gacharna, Miguel"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "B91"]
[EventDate "1957.03.15"]
[PlyCount "74"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 Be7 8. Bg2 Be6 9. O-O O-O 10. a4 a5 11. b3 Na6 12. Bg5 Nd7 13. Bxe7 Qxe7 14. Nb5 Ndc5 15. c4 Nb4 16. Nec3 Rad8 17. Re1 Qg5 18. Rb1 f5 19. Nc7 f4 20. Nxe6 Nxe6 21. Nd5 fxg3 22. hxg3 Nd4 23. Ne3 g6 24. Rb2 Rd7 25. Nf1 Rdf7 26. Nh2 h5 27. Rf1 Kg7 28. Kh1 h4 29. f4 Qh6 30. Ng4 Qh5 31. f5 hxg3+ 32. Kg1 gxf5 33. exf5 Rxf5 34. Rxf5 Rxf5 35. Bh1 Nbc2 36. Rxc2 Nxc2 37. Be4 Ne3 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.25"]
[Round "8"]
[White "Esposito, Alfredo H"]
[Black "Behrensen, Jorge"]
[Result "1-0"]
[ECO "A99"]
[EventDate "1957.03.15"]
[PlyCount "95"]

1. c4 e6 2. g3 f5 3. Bg2 Nf6 4. Nf3 Be7 5. O-O O-O 6. b3 d6 7. d4 Qe8 8. Bb2 a5 9. Nc3 Bd8 10. Re1 Qg6 11. e4 fxe4 12. Nxe4 Nxe4 13. Rxe4 e5 14. Re1 exd4 15. Nxd4 c6 16. Be4 Qh6 17. Bc1 Qf6 18. Bf4 Bb6 19. Nf3 Bg4 20. Qxd6 Nd7 21. Qxf6 Nxf6 22. Ne5 Rae8 23. Bg2 Bd4 24. Rac1 g5 25. Nxg4 Nxg4 26. Rxe8 Rxe8 27. Bxg5 Nxf2 28. Kf1 Ng4 29. Bf3 Nxh2+ 30. Kg2 Nxf3 31. Kxf3 Rf8+ 32. Ke4 Bf2 33. g4 Re8+ 34. Kf5 Bd4 35. Rd1 c5 36. Bf6 Re2 37. Bxd4 cxd4 38. Rxd4 a4 39. Rd8+ Kg7 40. Rd7+ Kg8 41. Rxb7 Rxa2 42. b4 a3 43. Ra7 Ra1 44. Kf6 Rf1+ 45. Kg5 Ra1 46. c5 a2 47. c6 Kf8 48. b5 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.25"]
[Round "8"]
[White "Keres, Paul"]
[Black "Wexler, Bernardo"]
[Result "1-0"]
[ECO "B66"]
[EventDate "1957.03.15"]
[PlyCount "81"]

1. e4 c5 2. Ne2 Nf6 3. Nbc3 Nc6 4. d4 cxd4 5. Nxd4 d6 6. Bg5 e6 7. Qd2 a6 8. O-O-O h6 9. Bf4 Bd7 10. Nxc6 Bxc6 11. f3 d5 12. Qe1 Be7 13. exd5 exd5 14. Ne2 O-O 15. Nd4 Bd6 16. Qd2 Re8 17. g4 Bxf4 18. Qxf4 Qa5 19. a3 Re1 20. Bd3 Rxh1 21. Rxh1 Re8 22. Rd1 Nd7 23. h4 Ne5 24. Bf1 Bd7 25. g5 hxg5 26. hxg5 Qc7 27. Kb1 Rc8 28. Qd2 Ng6 29. Bd3 Nf4 30. Rh1 g6 31. Qe1 Re8 32. Qh4 Nh5 33. Ne2 Bf5 34. Bxf5 Rxe2 35. Bd3 Re3 36. Qg4 Kg7 37. Qd4+ Qe5 38. Qb6 Qxg5 39. Qxb7 Qg2 40. Rc1 Qxf3 41. Rf1 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.25"]
[Round "8"]
[White "Lombardy, William James"]
[Black "Kotov, Alexander"]
[Result "1/2-1/2"]
[ECO "E42"]
[EventDate "1957.03.15"]
[PlyCount "53"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nge2 d5 6. a3 cxd4 7. axb4 dxc3 8. Nxc3 O-O 9. cxd5 exd5 10. Be2 Be6 11. O-O Nc6 12. b5 Na5 13. Ra4 Qc7 14. Rd4 Nc4 15. Bf3 Rfd8 16. Nxd5 Nxd5 17. Bxd5 Bxd5 18. Rxd5 Rxd5 19. Qxd5 Rd8 20. Qe4 Rc8 21. h3 Qb6 22. b3 Nd6 23. Qg4 Rc2 24. Rd1 h6 25. Qd7 Nxb5 26. Bd2 Qc6 27. Qd8+ 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.25"]
[Round "8"]
[White "Mangini, Jose Thiago"]
[Black "Incutto, Carlos"]
[Result "1-0"]
[ECO "B74"]
[EventDate "1957.03.15"]
[PlyCount "65"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 g6 7. Be3 Bg7 8. O-O O-O 9. Nb3 a6 10. f4 b5 11. Bf3 Bb7 12. a3 Na5 13. e5 Bxf3 14. Qxf3 Nd7 15. Nxa5 Qxa5 16. Qc6 Qd8 17. Nd5 Re8 18. Rfd1 Bf8 19. a4 bxa4 20. Rxa4 Rc8 21. Qxa6 Rxc2 22. b4 e6 23. Qd3 Qc8 24. Ra7 exd5 25. b5 Rc3 26. Qd2 Rxe3 27. Rc1 dxe5 28. Rxc8 Rxc8 29. Rxd7 Rec3 30. Qxd5 Rc1+ 31. Kf2 R8c2+ 32. Kg3 exf4+ 33. Kh3 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.25"]
[Round "8"]
[White "Sanguineti, Raul"]
[Black "Rossetto, Hector Decio"]
[Result "1-0"]
[ECO "C92"]
[EventDate "1957.03.15"]
[PlyCount "67"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. h3 d6 9. c3 Nd7 10. d4 Bf6 11. a4 Bb7 12. d5 Ne7 13. axb5 axb5 14. Rxa8 Bxa8 15. Na3 Nc5 16. Bc2 Qb8 17. b4 Na6 18. Qd3 c6 19. dxc6 Bxc6 20. Nd4 Bb7 21. Naxb5 Rd8 22. Ne2 g6 23. Na3 d5 24. exd5 Nxd5 25. Qg3 Rc8 26. Be4 Nb6 27. Qf3 Bxe4 28. Qxe4 Bg7 29. Rd1 Rd8 30. Rxd8+ Qxd8 31. Qc6 h5 32. Be3 Qd1+ 33. Kh2 Nd7 34. Qxa6 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.26"]
[Round "9"]
[White "Behrensen, Jorge"]
[Black "Cuellar Gacharna, Miguel"]
[Result "1-0"]
[ECO "E99"]
[EventDate "1957.03.15"]
[PlyCount "94"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Nd3 f5 11. f3 a5 12. Be3 b6 13. Rc1 Nc5 14. a3 Bd7 15. b4 axb4 16. axb4 Na4 17. Qb3 Nxc3 18. Rxc3 fxe4 19. fxe4 Rxf1+ 20. Bxf1 Ra1 21. Rc1 Qa8 22. Rxa1 Qxa1 23. c5 Bb5 24. cxb6 cxb6 25. Qc2 Bf6 26. Bxb6 Bg5 27. Bf2 Qa6 28. h4 Bh6 29. Qe2 Qc8 30. Qf3 Qa6 31. Be1 Qa1 32. Bg3 Bd2 33. Kh2 Kg7 34. Be2 Qa3 35. Nxe5 Qxf3 36. Nxf3 Bxe2 37. Nxd2 Nc8 38. Bf4 Kf6 39. Kg3 Ke7 40. Bg5+ Kd7 41. Nb3 Nb6 42. Kf2 Bb5 43. Ke3 Ke8 44. Kd4 Be2 45. Bf6 Ba6 46. e5 dxe5+ 47. Bxe5 Bb7 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.26"]
[Round "9"]
[White "Eliskases, Erich"]
[Black "Mangini, Jose Thiago"]
[Result "1-0"]
[ECO "E66"]
[EventDate "1957.03.15"]
[PlyCount "83"]

1. Nf3 c5 2. c4 Nf6 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. d4 d6 8. d5 Ne5 9. Nxe5 dxe5 10. e4 Ne8 11. Be3 b6 12. Qd2 Nd6 13. b3 f5 14. Rac1 Rf7 15. exf5 gxf5 16. Bh6 Qf8 17. Qg5 Kh8 18. Bxg7+ Qxg7 19. Qxg7+ Kxg7 20. Rfe1 Kf6 21. Rc2 Bd7 22. Rce2 e4 23. Re3 a6 24. f3 exf3 25. Bxf3 b5 26. Re6+ Bxe6 27. dxe6 Rff8 28. Bxa8 Rxa8 29. Nd5+ Kg5 30. Nxe7 bxc4 31. Nd5 cxb3 32. axb3 Ne8 33. Rc1 Rb8 34. Rxc5 Rxb3 35. Rc8 Kg4 36. Kf2 Nd6 37. Rg8+ Kh3 38. e7 Rb5 39. Rd8 Rxd5 40. Rxd6 Re5 41. Kf3 Kxh2 42. Rd2+ 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.26"]
[Round "9"]
[White "Incutto, Carlos"]
[Black "Casas, Fernando"]
[Result "1-0"]
[ECO "E66"]
[EventDate "1957.03.15"]
[PlyCount "82"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. c4 Nc6 7. Nc3 a6 8. d5 Na5 9. Nd2 c5 10. a3 Ng4 11. Qc2 Ne5 12. b3 Rb8 13. Rb1 Qc7 14. Bb2 b5 15. Nd1 bxc4 16. bxc4 Bd7 17. h3 Be8 18. f4 Nd7 19. Bxg7 Kxg7 20. Rxb8 Nxb8 21. e4 Nd7 22. Ne3 f6 23. h4 Bf7 24. Bh3 Rb8 25. Bxd7 Qxd7 26. Qc3 Qa4 27. Kh2 Kg8 28. e5 f5 29. e6 Be8 30. g4 fxg4 31. h5 Nb3 32. Rb1 Nxd2 33. Rxb8 Nf3+ 34. Kh1 gxh5 35. Rb7 Nd4 36. Rxe7 Bg6 37. Rd7 g3 38. Rd8+ Kg7 39. Qb2 Kh6 40. f5 Bxf5 41. Nxf5+ Nxf5 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.26"]
[Round "9"]
[White "Kotov, Alexander"]
[Black "Keres, Paul"]
[Result "1/2-1/2"]
[ECO "E59"]
[EventDate "1957.03.15"]
[PlyCount "34"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 O-O 7. O-O Nc6 8. a3 Bxc3 9. bxc3 dxc4 10. Bxc4 Qc7 11. Bd3 e5 12. Qc2 Re8 13. e4 c4 14. Bxc4 exd4 15. cxd4 Na5 16. Bd3 Qxc2 17. Bxc2 Nxe4 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.26"]
[Round "9"]
[White "Najdorf, Miguel"]
[Black "Albert, E."]
[Result "1-0"]
[ECO "E89"]
[EventDate "1957.03.15"]
[PlyCount "55"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 e5 6. Nge2 c6 7. Be3 O-O 8. d5 cxd5 9. cxd5 Ne8 10. h4 f5 11. h5 f4 12. Bf2 g5 13. h6 Bf6 14. g3 Nd7 15. Bh3 Nb6 16. gxf4 exf4 17. Nd4 Bxh3 18. Rxh3 Qd7 19. Rh2 Nc7 20. Qd3 Kh8 21. O-O-O Rac8 22. Kb1 Na6 23. Ne6 Rg8 24. Bd4 Qe7 25. Nb5 Nd7 26. Bxf6+ Nxf6 27. Qd4 Nc5 28. Nxd6 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.26"]
[Round "9"]
[White "Panno, Oscar"]
[Black "Sanguineti, Raul"]
[Result "1-0"]
[ECO "E43"]
[EventDate "1957.03.15"]
[PlyCount "77"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 c5 7. O-O O-O 8. Na4 cxd4 9. exd4 Be7 10. Re1 Qc7 11. Bg5 h6 12. Bh4 d6 13. Nc3 Re8 14. Rc1 Nbd7 15. d5 e5 16. b4 Qd8 17. Bc2 Nh7 18. Bxe7 Rxe7 19. Ba4 f6 20. Bc6 Nb8 21. b5 a5 22. Nh4 Ra7 23. Nf5 Bc8 24. Nxe7+ Rxe7 25. c5 bxc5 26. Rb1 f5 27. b6 f4 28. f3 g5 29. Qd3 Rg7 30. b7 Bd7 31. Bxd7 Qxd7 32. Ne4 g4 33. Rb6 Qc7 34. Reb1 c4 35. Qa3 gxf3 36. Qxf3 a4 37. Rc6 Qa5 38. Rxc4 Nf8 39. Nxd6 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.26"]
[Round "9"]
[White "Rossetto, Hector Decio"]
[Black "Lombardy, William James"]
[Result "0-1"]
[ECO "D36"]
[EventDate "1957.03.15"]
[PlyCount "80"]

1. c4 Nf6 2. Nf3 e6 3. Nc3 d5 4. cxd5 exd5 5. d4 c6 6. Qc2 Be7 7. Bg5 Na6 8. a3 Nc7 9. e3 Ne6 10. Bh4 g6 11. Bd3 Ng7 12. O-O Bf5 13. b4 a6 14. Na4 Bxd3 15. Qxd3 Nf5 16. Bg5 O-O 17. Nc5 Nd6 18. Nd2 Nh5 19. Bh6 Re8 20. Nf3 Nf5 21. Bf4 Nxf4 22. exf4 Qc7 23. g3 Bf8 24. Rac1 Nd6 25. h4 a5 26. h5 axb4 27. axb4 Nb5 28. hxg6 hxg6 29. f5 Ra3 30. Nb3 Qd6 31. Rfe1 Re4 32. fxg6 Qxg6 33. Qd1 Rxe1+ 34. Nxe1 Bxb4 35. Nd3 Bd6 36. Ne5 Qf5 37. f4 Qh3 38. Qd3 Nxd4 39. Qxd4 Rxb3 40. Rc3 Rb2 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.26"]
[Round "9"]
[White "Rubio Aguado, Fernando"]
[Black "Ader Hausman, Walter"]
[Result "0-1"]
[ECO "A72"]
[EventDate "1957.03.15"]
[PlyCount "148"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 e6 8. Nf3 exd5 9. cxd5 a6 10. a4 Qa5 11. O-O Re8 12. Nd2 Nbd7 13. f4 Qc7 14. Bh4 Nf8 15. Bg3 N6d7 16. Kh1 f5 17. Bd3 Nf6 18. h3 fxe4 19. Ncxe4 Nxe4 20. Nxe4 Bf5 21. Nc3 Qf7 22. Bh2 Re3 23. Be2 Rae8 24. Bg1 R3e7 25. Bf3 c4 26. Qd2 Bd3 27. Rfe1 Bh6 28. Rxe7 Qxe7 29. Bf2 Qf6 30. Bg3 Nd7 31. Re1 Rxe1+ 32. Qxe1 Nc5 33. Qe8+ Qf8 34. Qe3 Bg7 35. Bg4 Bf6 36. Be6+ Kg7 37. Bf2 Qe7 38. g4 g5 39. Bg3 h6 40. h4 Qd8 41. Be1 Qe7 42. Bd2 Nb3 43. hxg5 hxg5 44. fxg5 Bd4 45. Qh3 Kf8 46. Bf4 Ke8 47. Qh2 Qg7 48. Qh5+ Kd8 49. Qf7 Qh8+ 50. Bh2 Nc5 51. Qg8+ Qxg8 52. Bxg8 Ne4 53. Bf4 Nxc3 54. bxc3 Bxc3 55. Bf7 Be5 56. Bc1 Ke7 57. Be6 Be4+ 58. Kg1 b5 59. Kf2 b4 60. Ke3 Bc2 61. a5 b3 62. Bc8 c3 63. Bf5 Bxf5 64. gxf5 b2 65. f6+ Bxf6 66. gxf6+ Kxf6 67. Bxb2 cxb2 68. Kd4 Kf5 69. Kc4 b1=R 70. Kc3 Rb5 71. Kc4 Ke4 72. Kc3 Rxa5 73. Kb4 Rxd5 74. Ka4 Rb5 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.26"]
[Round "9"]
[White "Wexler, Bernardo"]
[Black "Esposito, Alfredo H"]
[Result "1/2-1/2"]
[ECO "D75"]
[EventDate "1957.03.15"]
[PlyCount "44"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 d5 6. cxd5 Nxd5 7. d4 c5 8. dxc5 Na6 9. Ng5 Ndb4 10. Nc3 h6 11. Nf3 Qxd1 12. Rxd1 Be6 13. Ne1 Nxc5 14. Be3 Rac8 15. Rac1 b6 16. a3 Nc6 17. Bxc5 bxc5 18. Bd5 Bxd5 19. Rxd5 c4 20. Nf3 Rfd8 21. Rcd1 Rxd5 22. Rxd5 Rb8 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.28"]
[Round "10"]
[White "Ader Hausman, Walter"]
[Black "Incutto, Carlos"]
[Result "1/2-1/2"]
[ECO "C90"]
[EventDate "1957.03.15"]
[PlyCount "109"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7 11. a4 Rb8 12. axb5 cxd4 13. bxa6 dxc3 14. Nxc3 Bxa6 15. Ba4+ Kf8 16. Nh4 Bc8 17. Qf3 Nb3 18. Bxb3 Rxb3 19. Nf5 Bxf5 20. Qxf5 Rb8 21. Bg5 Qc8 22. Qf3 Nd7 23. Bxe7+ Kxe7 24. Nd5+ Kf8 25. Qa3 Nc5 26. b4 Ne6 27. Qa7 Qd8 28. Re3 Nd4 29. Rc1 Ra8 30. Qb7 g6 31. g3 Rb8 32. Qa6 Ra8 33. Qc4 Kg7 34. b5 Rc8 35. Qxc8 Qxc8 36. Rxc8 Rxc8 37. b6 Ne6 38. Ra3 Nc5 39. f3 Nd7 40. g4 Rc1+ 41. Kg2 Rb1 42. Ra6 Rb2+ 43. Kg1 Rb1+ 44. Kf2 Rb2+ 45. Ke1 Nc5 46. Ra7 Rxh2 47. Rc7 Rb2 48. Rc6 Nd3+ 49. Kf1 h5 50. g5 Rb1+ 51. Kg2 Nf4+ 52. Nxf4 exf4 53. Rxd6 Rb4 54. Kh2 Rb2+ 55. Kg1 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.28"]
[Round "10"]
[White "Albert, E."]
[Black "Behrensen, Jorge"]
[Result "0-1"]
[ECO "E49"]
[EventDate "1957.03.15"]
[PlyCount "80"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 c5 8. cxd5 exd5 9. Ne2 b6 10. O-O Ba6 11. Bxa6 Nxa6 12. f3 Re8 13. Qd3 Nc7 14. Ng3 Ne6 15. Bb2 Rc8 16. Rae1 Qc7 17. Rf2 g6 18. e4 Nf4 19. Qd2 c4 20. Rff1 Nd3 21. Re3 Qe7 22. e5 Nd7 23. f4 f5 24. Re2 Nf8 25. Rf3 Ne6 26. Nf1 b5 27. g3 a5 28. Rg2 b4 29. axb4 axb4 30. g4 Nxb2 31. gxf5 bxc3 32. Rxc3 Nd3 33. fxe6 Qxe6 34. Ng3 Qb6 35. Qe3 Qb1+ 36. Nf1 Rf8 37. Rg4 Qd1 38. h3 Ra8 39. Qd2 Ra1 40. Qg2 Kh8 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.28"]
[Round "10"]
[White "Casas, Fernando"]
[Black "Eliskases, Erich"]
[Result "0-1"]
[ECO "E55"]
[EventDate "1957.03.15"]
[PlyCount "54"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. a3 cxd4 10. Nb5 Be7 11. Nbxd4 e5 12. Nf5 Nb6 13. Nxe7+ Qxe7 14. Ba2 Bg4 15. Qe1 Be6 16. b3 Bd5 17. Bb2 Nbd7 18. Nd2 Nc5 19. Qe2 Nfe4 20. Rfc1 Nxd2 21. Qxd2 Rad8 22. Qc3 Qg5 23. e4 Bxe4 24. g3 Nd3 25. Re1 Qf5 26. f4 Rc8 27. Qd2 Nxe1 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.28"]
[Round "10"]
[White "Cuellar Gacharna, Miguel"]
[Black "Wexler, Bernardo"]
[Result "1-0"]
[ECO "D07"]
[EventDate "1957.03.15"]
[PlyCount "91"]

1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 4. e3 e6 5. Bxc4 g6 6. Nf3 Bg7 7. Bd2 Nge7 8. O-O O-O 9. Qe2 b6 10. Rfd1 Bb7 11. Be1 Nf5 12. Rac1 Qe7 13. Ba6 Bxa6 14. Qxa6 Nb4 15. Qa4 a5 16. a3 Na6 17. e4 Nd6 18. e5 Nf5 19. Ne4 Qe8 20. Qc2 Ne7 21. Bd2 Nd5 22. Bg5 h6 23. Bh4 Qd7 24. Qd2 Rfc8 25. Bf6 Bf8 26. h4 c5 27. h5 cxd4 28. Rxc8 Rxc8 29. hxg6 fxg6 30. Qd3 Ra8 31. Nxd4 Nac7 32. Qg3 Kh7 33. Qh4 Bg7 34. Rd3 Rf8 35. Rh3 h5 36. Rg3 Bh6 37. Bg5 Bg7 38. Nf3 Rf5 39. Bf6 Nf4 40. Bxg7 Kxg7 41. Rg5 Ncd5 42. Rxf5 exf5 43. Nf6 Qc6 44. Kh2 Ne6 45. Nxd5 Qxd5 46. Qf6+ 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.28"]
[Round "10"]
[White "Keres, Paul"]
[Black "Esposito, Alfredo H"]
[Result "1-0"]
[ECO "C06"]
[EventDate "1957.03.15"]
[PlyCount "77"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. Bd3 c5 5. e5 Nfd7 6. c3 Nc6 7. Ne2 Qb6 8. Nf3 cxd4 9. cxd4 f6 10. exf6 Nxf6 11. O-O Bd6 12. Nf4 O-O 13. Re1 Ne4 14. g3 Bxf4 15. Bxf4 e5 16. Nxe5 Bf5 17. Nxc6 Qxc6 18. f3 Nd6 19. Rc1 Qb6 20. Bxd6 Qxd6 21. Re5 Bxd3 22. Qxd3 Rac8 23. Rxc8 Rxc8 24. Qb3 Qc6 25. Rxd5 Qc1+ 26. Kg2 Qc2+ 27. Kh3 Qxb3 28. axb3 b6 29. Rd7 Rc2 30. Rxa7 Rxb2 31. Kg4 Rxb3 32. Kf4 b5 33. d5 Kf8 34. Rb7 b4 35. Ke5 Re3+ 36. Kd4 Rxf3 37. d6 Rf2 38. Ke3 Rf6 39. Rb8+ 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.28"]
[Round "10"]
[White "Kotov, Alexander"]
[Black "Rossetto, Hector Decio"]
[Result "1-0"]
[ECO "E14"]
[EventDate "1957.03.15"]
[PlyCount "81"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. e3 Be7 5. b3 O-O 6. Bb2 b6 7. d4 Bb7 8. Bd3 Nbd7 9. O-O c5 10. Qe2 Rc8 11. Rac1 dxc4 12. bxc4 Qc7 13. Rfd1 Rfd8 14. Ne5 Qb8 15. f4 Nf8 16. d5 exd5 17. cxd5 Ng6 18. Ng4 Nxg4 19. Qxg4 Bf6 20. Bf5 Rc7 21. e4 Bd4+ 22. Kh1 Re7 23. Rf1 Ba6 24. Rf3 b5 25. e5 b4 26. d6 bxc3 27. dxe7 cxb2 28. exd8=Q+ Qxd8 29. Re1 Nh4 30. e6 fxe6 31. Bxe6+ Kh8 32. Rb3 g6 33. Bd7 Kg7 34. Re8 h5 35. Qe6 Qf6 36. Rg8+ Kh6 37. Qxf6 Bxf6 38. Rgb8 Bf1 39. Rxb2 Bxb2 40. Rxb2 c4 41. g3 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.28"]
[Round "10"]
[White "Lombardy, William James"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "E63"]
[EventDate "1957.03.15"]
[PlyCount "170"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nc6 7. Nc3 a6 8. b3 Bg4 9. Be3 Qd7 10. Qd2 Rab8 11. Rac1 Rfc8 12. Rfd1 Bxf3 13. exf3 e6 14. d5 Ne7 15. dxe6 fxe6 16. Ne4 Nf5 17. Ba7 Ra8 18. Be3 Qe7 19. Bg5 Qf7 20. Bxf6 Bxf6 21. f4 Be7 22. Re1 Re8 23. c5 d5 24. Ng5 Bxg5 25. fxg5 Rad8 26. Re5 Ne7 27. f4 Nc6 28. Re3 e5 29. fxe5 Rxe5 30. Rf3 Qe7 31. Rf6 d4 32. Qd3 Rxg5 33. Qc4+ Kg7 34. Re6 Qf7 35. Rce1 Rd7 36. Bxc6 bxc6 37. Rxc6 Qxc4 38. bxc4 d3 39. Rd1 d2 40. Kf2 a5 41. Re6 Rxc5 42. Re2 Rxc4 43. Rdxd2 Rxd2 44. Rxd2 Kf6 45. Ke3 Ke5 46. Rd7 h5 47. Kd3 Rc5 48. Rf7 Ke6 49. Rf4 Rg5 50. Kc4 Rg4 51. a4 Rg5 52. Rf2 Kd7 53. Rf6 Kc8 54. Rf7 Kb7 55. Rf6 c6 56. Rf8 Kc7 57. Rg8 Kd6 58. Rd8+ Ke5 59. Kc5 Rg4 60. Kxc6 Rxa4 61. Rd5+ Kf6 62. Kb5 Ra2 63. h4 Ra3 64. Rd6+ Kg7 65. Rd7+ Kh6 66. Rd1 Rxg3 67. Kxa5 Rb3 68. Ka4 Rh3 69. Rd4 Rg3 70. Kb4 Kg7 71. Kc5 Kf6 72. Kd5 Kf5 73. Rd1 Rg4 74. Rf1+ Rf4 75. Rh1 g5 76. hxg5 Kxg5 77. Ke5 h4 78. Rg1+ Rg4 79. Rh1 Rg2 80. Ke4 Kg4 81. Ra1 h3 82. Ra8 Re2+ 83. Kd3 Re5 84. Rh8 Rh5 85. Rg8+ Kh4 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.28"]
[Round "10"]
[White "Mangini, Jose Thiago"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "B92"]
[EventDate "1957.03.15"]
[PlyCount "52"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. Be3 Be6 9. O-O O-O 10. a4 Nc6 11. f3 Nb4 12. Re1 Rc8 13. Nc1 d5 14. exd5 Nfxd5 15. Nxd5 Nxd5 16. Bf2 Qc7 17. c3 Nf4 18. Bf1 Rfd8 19. Qc2 g6 20. g3 Bf5 21. Qb3 Nh3+ 22. Bxh3 Bxh3 23. Qb6 Qd7 24. Nb3 Qd5 25. Na5 Qxf3 26. Qxb7 Rd5 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.28"]
[Round "10"]
[White "Sanguineti, Raul"]
[Black "Rubio Aguado, Fernando"]
[Result "1-0"]
[ECO "B33"]
[EventDate "1957.03.15"]
[PlyCount "63"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be3 e5 7. Ndb5 a6 8. Na3 b5 9. Nd5 Nxd5 10. exd5 Nb8 11. c4 b4 12. Qa4+ Nd7 13. Qxb4 Be7 14. Be2 f5 15. f4 Rb8 16. Qd2 O-O 17. Rb1 exf4 18. Bxf4 Nc5 19. O-O Ne4 20. Qc1 Bf6 21. Nc2 g5 22. Be3 f4 23. Bd4 Bxd4+ 24. Nxd4 Qb6 25. Rd1 g4 26. b4 f3 27. Bf1 g3 28. gxf3 Rxf3 29. Bg2 gxh2+ 30. Kxh2 Qd8 31. Nxf3 Bg4 32. Qf4 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.29"]
[Round "11"]
[White "Behrensen, Jorge"]
[Black "Mangini, Jose Thiago"]
[Result "0-1"]
[ECO "A05"]
[EventDate "1957.03.15"]
[PlyCount "118"]

1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O e6 5. d3 Be7 6. e4 d6 7. Re1 O-O 8. Nbd2 c5 9. c3 Nbd7 10. a4 a6 11. d4 Rc8 12. e5 dxe5 13. dxe5 Ne8 14. Qe2 Qc7 15. Nc4 Bc6 16. Bf4 b5 17. axb5 axb5 18. Na5 Bd5 19. c4 bxc4 20. Nxc4 Rb8 21. Rac1 Qb7 22. Rcd1 Nc7 23. Bc1 Qb5 24. Nfd2 Nb6 25. b3 Bxg2 26. Kxg2 Nbd5 27. Qf3 f5 28. Ba3 Qc6 29. Kg1 Nb5 30. Bb2 Nd4 31. Bxd4 cxd4 32. Nd6 Qc3 33. Kg2 Bg5 34. N6c4 Bxd2 35. Nxd2 Rfc8 36. Qh5 Qc2 37. Nf1 d3 38. Qf3 Rxb3 39. Ne3 Nxe3+ 40. Qxe3 Rd8 41. Rd2 Qc6+ 42. f3 h6 43. Kf2 Qc3 44. Red1 Rd5 45. h4 Rxe5 46. Qxd3 Qc5+ 47. Qd4 Qxd4+ 48. Rxd4 Ree3 49. g4 Rxf3+ 50. Ke2 f4 51. Re4 Rbe3+ 52. Rxe3 Rxe3+ 53. Kf2 e5 54. Rd6 Rg3 55. Rg6 e4 56. h5 e3+ 57. Ke2 Rg2+ 58. Kf1 f3 59. Re6 e2+ 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.29"]
[Round "11"]
[White "Eliskases, Erich"]
[Black "Ader Hausman, Walter"]
[Result "1/2-1/2"]
[ECO "E60"]
[EventDate "1957.03.15"]
[PlyCount "52"]

1. c4 Nf6 2. Nf3 c6 3. b3 g6 4. Bb2 Bg7 5. g3 O-O 6. Bg2 d6 7. d4 e5 8. dxe5 Ng4 9. O-O Nd7 10. Nc3 Ndxe5 11. Nxe5 dxe5 12. Ne4 f5 13. Nd6 Qc7 14. c5 Be6 15. Qc2 Rad8 16. Rad1 Rd7 17. Bc1 Nh6 18. e4 f4 19. f3 Rdd8 20. Rf2 Qe7 21. gxf4 exf4 22. Bb2 Rd7 23. Rfd2 Rfd8 24. b4 Nf7 25. Bxg7 Kxg7 26. Nxf7 Kxf7 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.29"]
[Round "11"]
[White "Esposito, Alfredo H"]
[Black "Cuellar Gacharna, Miguel"]
[Result "1/2-1/2"]
[ECO "E65"]
[EventDate "1957.03.15"]
[PlyCount "91"]

1. c4 g6 2. Nc3 Bg7 3. g3 c5 4. Bg2 Nc6 5. Nf3 Nf6 6. d4 O-O 7. O-O d6 8. dxc5 dxc5 9. Bf4 Be6 10. Ne5 Nd4 11. Nd3 Qc8 12. e3 Nc6 13. Nd5 Bh3 14. Bg5 Bxg2 15. Kxg2 Qf5 16. Bxf6 Bxf6 17. Rc1 b6 18. Nxf6+ Qxf6 19. Qf3 Kg7 20. Qxf6+ Kxf6 21. Nf4 e6 22. Rfd1 Rfd8 23. h4 h6 24. b3 Ne5 25. Kf1 g5 26. hxg5+ hxg5 27. Ne2 Kf5 28. Nc3 g4 29. Rxd8 Rxd8 30. Rd1 Rxd1+ 31. Nxd1 Nf3 32. Nc3 Nd2+ 33. Ke1 Ne4 34. Nb5 a5 35. a4 Ke5 36. Ke2 Kf6 37. Ke1 Ke7 38. Ke2 Kd7 39. Ke1 f5 40. Ke2 Ke8 41. Ke1 Kd7 42. Ke2 Ng5 43. Nc3 Kd6 44. Nb5+ Ke5 45. Nc3 Nf7 46. Nb5 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.29"]
[Round "11"]
[White "Incutto, Carlos"]
[Black "Sanguineti, Raul"]
[Result "0-1"]
[ECO "D36"]
[EventDate "1957.03.15"]
[PlyCount "64"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. cxd5 exd5 6. Bg5 Be7 7. Qc2 Na6 8. a3 Nc7 9. e3 Ne6 10. Bh4 g6 11. Bd3 Ng7 12. O-O Bf5 13. b4 a6 14. Rab1 Bxd3 15. Qxd3 Nf5 16. Bg5 O-O 17. Rfc1 Ne4 18. Bxe7 Qxe7 19. Na4 Nfd6 20. Nb6 Rae8 21. a4 Qd8 22. a5 Kg7 23. Qc2 h5 24. Re1 h4 25. Ne5 h3 26. f3 Ng5 27. Nbd7 Rh8 28. Nc5 hxg2 29. Qxg2 Rh5 30. Qc2 Rxe5 31. dxe5 Nxf3+ 32. Kf1 Nxe1 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.29"]
[Round "11"]
[White "Najdorf, Miguel"]
[Black "Casas, Fernando"]
[Result "1-0"]
[ECO "E39"]
[EventDate "1957.03.15"]
[PlyCount "81"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O 6. Nf3 Na6 7. a3 Bxc3+ 8. Qxc3 Nxc5 9. Bf4 d5 10. e3 b6 11. b4 Nce4 12. Qb2 Bb7 13. Be5 Qe7 14. cxd5 Bxd5 15. Ba6 Rfd8 16. O-O Bb7 17. Bc4 Rac8 18. Rac1 Ne8 19. Nd4 N4d6 20. Ba2 Rxc1 21. Rxc1 Rc8 22. Rxc8 Nxc8 23. f3 Qd7 24. e4 Ne7 25. b5 Ng6 26. Bb8 a6 27. bxa6 Bxa6 28. h4 Qb7 29. Bg3 Nf6 30. Qb4 h6 31. a4 Nh5 32. Bf2 Ne7 33. Qd6 Kh7 34. Bb1 g6 35. g4 Ng7 36. Nb5 Bxb5 37. axb5 Nc8 38. Qe5 Ne8 39. Bd4 f6 40. Qxe6 Qc7 41. Kg2 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.29"]
[Round "11"]
[White "Panno, Oscar"]
[Black "Kotov, Alexander"]
[Result "0-1"]
[ECO "D29"]
[EventDate "1957.03.15"]
[PlyCount "81"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. Rd1 Nbd7 10. Nc3 cxd4 11. exd4 b4 12. d5 bxc3 13. dxe6 fxe6 14. Ne5 Qb6 15. Ba4 O-O-O 16. Nf7 Bc5 17. Nxh8 Rxh8 18. bxc3 Rd8 19. Bf4 Nd5 20. Bd2 e5 21. c4 Nc7 22. Be3 Bxe3 23. fxe3 Qg6 24. Rab1 Be4 25. Rb2 Nc5 26. Rxd8+ Kxd8 27. Rb8+ Ke7 28. Bd1 Nd7 29. Rb2 Ne6 30. Qf2 Nec5 31. Be2 Nf6 32. h3 h6 33. Kh2 Bc6 34. Rb6 Nfd7 35. Rb2 e4 36. Bg4 Qd6+ 37. Qg3 Ne5 38. Be2 g5 39. Kh1 Ncd3 40. Rb1 Nxc4 41. Qg4 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.29"]
[Round "11"]
[White "Rossetto, Hector Decio"]
[Black "Keres, Paul"]
[Result "0-1"]
[ECO "C46"]
[EventDate "1957.03.15"]
[PlyCount "44"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 g6 4. d4 exd4 5. Nxd4 Bg7 6. Be3 Nf6 7. Be2 O-O 8. Qd2 Re8 9. f3 d5 10. Nxc6 bxc6 11. exd5 Nxd5 12. Nxd5 cxd5 13. c3 c5 14. O-O d4 15. Bf2 Qa5 16. Rfc1 Bf5 17. Bc4 Rad8 18. Qg5 dxc3 19. bxc3 Bxc3 20. Rxc3 Qxc3 21. Rc1 Qb2 22. Be1 h6 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.29"]
[Round "11"]
[White "Rubio Aguado, Fernando"]
[Black "Lombardy, William James"]
[Result "0-1"]
[ECO "A62"]
[EventDate "1957.03.15"]
[PlyCount "76"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. g3 Bg7 8. Bg2 O-O 9. O-O Nbd7 10. Nd2 Ne8 11. e4 Ne5 12. Qe2 f5 13. f4 Nf7 14. a4 Nc7 15. Nc4 fxe4 16. Bxe4 Bh3 17. Re1 Qd7 18. Bd2 Nh6 19. Bg2 Bxg2 20. Qxg2 Nf5 21. Ne4 Nd4 22. Bc3 Nxd5 23. Nexd6 Qc6 24. Rad1 Nxc3 25. bxc3 Nf3+ 26. Kf1 Nxe1 27. Rxe1 Bxc3 28. Re7 Qxg2+ 29. Kxg2 b6 30. Kf3 Bg7 31. Ke4 Rf6 32. Rd7 Rff8 33. Kd5 Rad8 34. Rxa7 Rf6 35. Rb7 Bf8 36. Rxb6 Bxd6 37. Rxd6 Rfxd6+ 38. Nxd6 c4 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.29"]
[Round "11"]
[White "Wexler, Bernardo"]
[Black "Albert, E."]
[Result "1-0"]
[ECO "D56"]
[EventDate "1957.03.15"]
[PlyCount "55"]

1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. d4 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 Nbd7 8. cxd5 exd5 9. Qc2 c5 10. dxc5 Qa5 11. Be2 Qxc5 12. O-O Nb6 13. Rfd1 Be6 14. Nd4 Rac8 15. Bd3 Nh5 16. Bxe7 Qxe7 17. Rac1 Rfd8 18. Bf5 Nf6 19. b3 Nbd7 20. Qb1 Nc5 21. Rd2 a6 22. h3 Rc7 23. Nce2 Nfe4 24. Rdc2 Bxf5 25. Nxf5 Qe5 26. Ned4 Rdc8 27. b4 Na4 28. f4 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.30"]
[Round "12"]
[White "Ader Hausman, Walter"]
[Black "Najdorf, Miguel"]
[Result "0-1"]
[ECO "C97"]
[EventDate "1957.03.15"]
[PlyCount "93"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Re1 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Re8 13. Nf1 Bf8 14. Bg5 Nd7 15. Ne3 Nb6 16. Bh4 f6 17. b4 Nac4 18. Nd5 Nxd5 19. exd5 cxb4 20. cxb4 Qf7 21. Nh2 Bb7 22. Qd3 g5 23. Ng4 gxh4 24. Nxf6+ Kh8 25. Nxe8 Rxe8 26. f4 e4 27. Rxe4 Rxe4 28. Qxe4 Bxd5 29. Qf5 Qxf5 30. Bxf5 Bg7 31. Kh2 Ne3 32. Bc8 Bxd4 33. Re1 Bxa2 34. Bxa6 Bc4 35. g4 d5 36. Bc8 Bb6 37. f5 d4 38. Ra1 Bd5 39. Bd7 d3 40. Bxb5 d2 41. Be2 Kg7 42. b5 Bc4 43. Bf3 Kf6 44. Ra6 Nd5 45. Ra1 Ke5 46. Rb1 Ne3 47. Ra1 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.30"]
[Round "12"]
[White "Albert, E."]
[Black "Esposito, Alfredo H"]
[Result "1-0"]
[ECO "E10"]
[EventDate "1957.03.15"]
[PlyCount "83"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 b5 6. Bg5 Qa5+ 7. Nc3 d6 8. Bxf6 gxf6 9. Qd3 a6 10. g3 Nd7 11. Qe4+ Ne5 12. Nh4 Be7 13. Bg2 Nc4 14. Rc1 Nxb2 15. O-O b4 16. Nd1 Nxd1 17. Rfxd1 Qc7 18. Rd3 a5 19. Re3 Ra7 20. Qf4 Rg8 21. Be4 Rg5 22. Bf5 Kf8 23. g4 a4 24. Bxc8 Qxc8 25. Nf5 Rb7 26. h3 h5 27. f3 hxg4 28. fxg4 Qxf5 29. Qxf5 Rxf5 30. gxf5 Bd8 31. Rg3 b3 32. axb3 axb3 33. h4 c4 34. h5 Bb6+ 35. Kg2 Ke7 36. h6 Rb8 37. h7 Rh8 38. Rxc4 Rxh7 39. Rb4 Bc5 40. Rb7+ Kf8 41. Rb8+ Ke7 42. Rgg8 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.30"]
[Round "12"]
[White "Casas, Fernando"]
[Black "Behrensen, Jorge"]
[Result "1-0"]
[ECO "A38"]
[EventDate "1957.03.15"]
[PlyCount "113"]

1. c4 Nf6 2. Nc3 c5 3. g3 g6 4. Bg2 Bg7 5. Nf3 O-O 6. O-O Nc6 7. b3 e5 8. Bb2 d6 9. e3 Re8 10. d3 a6 11. Qd2 Rb8 12. a4 h6 13. Rad1 Qb6 14. Qc2 Nb4 15. Qb1 d5 16. cxd5 Nfxd5 17. Nxd5 Nxd5 18. Nxe5 Nxe3 19. fxe3 Bxe5 20. Bd5 Bf5 21. e4 Qd6 22. Bxf7+ Kxf7 23. Bxe5 Rxe5 24. d4 cxd4 25. exf5 Kg8 26. fxg6 Rg5 27. Qe4 Qxg6 28. Rxd4 Qxe4 29. Rxe4 b5 30. Re6 bxa4 31. bxa4 Ra5 32. Rf4 h5 33. Kg2 Rb2+ 34. Kh3 Ra2 35. Ree4 Rd5 36. Rd4 Re5 37. Rfe4 Rf5 38. Re7 a5 39. Rd8+ Rf8 40. Rdd7 Rff2 41. Re8+ Rf8 42. Rxf8+ Kxf8 43. Rh7 Rxa4 44. Rxh5 Ra2 45. g4 a4 46. Ra5 a3 47. Kg3 Kf7 48. Ra6 Ra1 49. Kh4 Kg7 50. Kg5 Rh1 51. h4 Rh3 52. Ra7+ Kf8 53. h5 Rb3 54. h6 Kg8 55. Kg6 Rb6+ 56. Kh5 Rb3 57. g5 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.30"]
[Round "12"]
[White "Keres, Paul"]
[Black "Cuellar Gacharna, Miguel"]
[Result "1-0"]
[ECO "B66"]
[EventDate "1957.03.15"]
[PlyCount "83"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8. O-O-O h6 9. Bf4 Bd7 10. Nxc6 Bxc6 11. f3 d5 12. Qe1 Be7 13. exd5 exd5 14. Ne2 O-O 15. Nd4 Bd6 16. Qd2 Bxf4 17. Qxf4 Nh5 18. Qd2 Qg5 19. g3 Qxd2+ 20. Kxd2 Bd7 21. Bd3 Rfe8 22. Rhe1 Kf8 23. Kc3 Rec8+ 24. Kb3 Nf6 25. h4 Ng8 26. Re5 Rc5 27. Rde1 Rac8 28. c3 Ra5 29. a3 Rac5 30. g4 a5 31. g5 hxg5 32. hxg5 g6 33. f4 Re8 34. Rxe8+ Bxe8 35. Bxg6 a4+ 36. Kc2 Ne7 37. Bd3 Nc6 38. Kd2 Na5 39. f5 Nc4+ 40. Kc1 Bd7 41. f6 Rc8 42. Rh1 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.30"]
[Round "12"]
[White "Kotov, Alexander"]
[Black "Rubio Aguado, Fernando"]
[Result "1-0"]
[ECO "E64"]
[EventDate "1957.03.15"]
[PlyCount "39"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. d4 d6 6. Nf3 c5 7. Bd2 Nc6 8. d5 Na5 9. b3 a6 10. a4 Bd7 11. Ra3 b5 12. axb5 axb5 13. cxb5 Qb6 14. O-O Bxb5 15. Qc2 Ra6 16. Rfa1 Rfa8 17. Nxb5 Qxb5 18. e4 R6a7 19. Ra4 Nxd5 20. Rxa5 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.30"]
[Round "12"]
[White "Lombardy, William James"]
[Black "Incutto, Carlos"]
[Result "1-0"]
[ECO "C97"]
[EventDate "1957.03.15"]
[PlyCount "111"]

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. Nbd2 O-O 12. h3 Rd8 13. d5 Bd7 14. Qe2 Nh5 15. Nf1 g6 16. N3h2 Rf8 17. Bh6 Ng7 18. Ne3 Nb7 19. Qd2 Nd8 20. a4 Rb8 21. axb5 axb5 22. f4 exf4 23. Bxf4 f6 24. Neg4 Nf7 25. Nh6+ Nxh6 26. Bxh6 Ra8 27. Nf3 Rxa1 28. Rxa1 Rb8 29. b4 Ne8 30. Bd3 Qc8 31. Qe2 c4 32. Bc2 Ra8 33. Rxa8 Qxa8 34. Qd2 Qc8 35. Be3 Bf8 36. Nd4 Ng7 37. Ne2 Be7 38. Bd4 Ne8 39. Ng3 Ng7 40. Bd1 Ne8 41. Qf4 Qd8 42. Bf3 Ng7 43. Nf1 h5 44. Qh6 Be8 45. Ng3 Bf7 46. Ne2 Bf8 47. Qd2 Ne8 48. Qa2 Ng7 49. Qa5 Qd7 50. Bxf6 Ne8 51. Bd4 Bh6 52. Qb6 Nc7 53. Qb7 Bg5 54. e5 dxe5 55. Bxe5 Bd8 56. d6 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.30"]
[Round "12"]
[White "Mangini, Jose Thiago"]
[Black "Wexler, Bernardo"]
[Result "1/2-1/2"]
[ECO "E62"]
[EventDate "1957.03.15"]
[PlyCount "83"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 O-O 5. Bg2 d6 6. Nf3 Nc6 7. O-O Bg4 8. h3 Bxf3 9. Bxf3 Nd7 10. e3 e5 11. d5 Ne7 12. e4 f5 13. g4 fxg4 14. hxg4 h6 15. Kg2 g5 16. Be3 Ng6 17. Kg3 Rf7 18. Be2 a6 19. Rc1 b6 20. b4 Qe7 21. a3 Nh4 22. c5 bxc5 23. bxc5 Raf8 24. f3 h5 25. c6 Nb6 26. gxh5 g4 27. fxg4 Rxf1 28. Bxf1 Rf3+ 29. Qxf3 Nxf3 30. Kxf3 Qf6+ 31. Kg2 Bh6 32. Re1 Bxe3 33. Rxe3 Qf4 34. Rf3 Qd2+ 35. Kh3 Qe1 36. g5 Na4 37. Nxa4 Qxe4 38. Kg3 Qxa4 39. Bh3 Qd4 40. Be6+ Kh8 41. Rf8+ Kh7 42. Rf7+ 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.30"]
[Round "12"]
[White "Rossetto, Hector Decio"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]
[ECO "B73"]
[EventDate "1957.03.15"]
[PlyCount "98"]

1. e4 c5 2. Nc3 Nc6 3. Nge2 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Be3 Nf6 7. Be2 O-O 8. O-O d6 9. Kh1 Be6 10. f4 Qd7 11. Qd2 a6 12. Rad1 Rac8 13. Bf3 Rfd8 14. Nxe6 Qxe6 15. Bb6 Rf8 16. b3 Nd7 17. Nd5 Nxb6 18. Nxb6 Rcd8 19. Qf2 Qf6 20. Nd5 Qb2 21. a4 e6 22. Nb6 Bd4 23. Nc4 Bxf2 24. Nxb2 Be3 25. g3 Rd7 26. Rd3 Ba7 27. Rfd1 Rfd8 28. c3 a5 29. Nc4 Bc5 30. g4 Kf8 31. h4 Ke7 32. Kg2 h6 33. Rh1 Rg8 34. Rb1 Rb8 35. Rbd1 Rdd8 36. Be2 Rd7 37. R3d2 Rdd8 38. Kf3 Rbc8 39. Kg2 Rb8 40. Kf3 Rbc8 41. Bf1 Rd7 42. Nb2 g5 43. Bb5 gxf4 44. Kxf4 Rg8 45. Nc4 Ne5 46. Nxe5 dxe5+ 47. Kf3 Rxd2 48. Rxd2 Rd8 49. Rxd8 Kxd8 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.03.30"]
[Round "12"]
[White "Sanguineti, Raul"]
[Black "Eliskases, Erich"]
[Result "1/2-1/2"]
[ECO "A07"]
[EventDate "1957.03.15"]
[PlyCount "62"]

1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. g3 Be7 5. Bg2 O-O 6. Ngf3 c6 7. O-O b5 8. Re1 Nfd7 9. Nf1 Bb7 10. e5 Nb6 11. h4 c5 12. Ng5 Nc6 13. Qh5 h6 14. Nf3 Qe8 15. Qg4 Kh8 16. N1h2 Rd8 17. Qf4 f6 18. exf6 Bxf6 19. Qd2 e5 20. Ng4 Qh5 21. Nfh2 e4 22. c3 exd3 23. Qxd3 c4 24. Qd1 Qf7 25. Nxf6 Qxf6 26. Be3 d4 27. cxd4 Nd5 28. Qf3 Qd6 29. Qxd5 Qxd5 30. Bxd5 Rxd5 31. Rad1 Bc8 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.02"]
[Round "13"]
[White "Behrensen, Jorge"]
[Black "Ader Hausman, Walter"]
[Result "0-1"]
[ECO "D75"]
[EventDate "1957.03.15"]
[PlyCount "64"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. c4 d5 6. cxd5 Nxd5 7. O-O c5 8. Nc3 cxd4 9. Nxd4 Nxc3 10. bxc3 Qa5 11. Qb3 e5 12. Bxb7 Bh3 13. Bxa8 exd4 14. Ba3 Be6 15. Qb4 Qa6 16. cxd4 Nd7 17. Bb7 Qxe2 18. Qe1 Qxe1 19. Rfxe1 Rb8 20. Bc6 Bxd4 21. Rad1 Ne5 22. Bd6 Bxf2+ 23. Kxf2 Rb2+ 24. Kg1 Nxc6 25. a3 g5 26. Rf1 h6 27. Rf2 Rb3 28. Rc2 Na5 29. Rdc1 Rd3 30. Bb4 Nb3 31. Rb1 Nd4 32. Re2 Nxe2+ 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.02"]
[Round "13"]
[White "Cuellar Gacharna, Miguel"]
[Black "Albert, E."]
[Result "0-1"]
[ECO "A13"]
[EventDate "1957.03.15"]
[PlyCount "88"]

1. c4 Nf6 2. Nf3 e6 3. g3 d5 4. Bg2 d4 5. b4 Bxb4 6. Qa4+ Nc6 7. Ne5 Rb8 8. Nxc6 bxc6 9. Qxa7 Rb6 10. Qa4 Bb7 11. O-O O-O 12. Qc2 c5 13. Bxb7 Rxb7 14. Na3 c6 15. Qd3 e5 16. f3 Qa8 17. Nc2 Qa4 18. Ne1 Nd7 19. Ng2 Rfb8 20. f4 Ba5 21. Nh4 Re8 22. fxe5 Nxe5 23. Qe4 Qxc4 24. Nf5 Qe6 25. Rb1 Nf3+ 26. Qxf3 Rxb1 27. Qg4 g6 28. Nh6+ Kg7 29. Rxf7+ Qxf7 30. Nxf7 Rxc1+ 31. Kg2 Kxf7 32. Qf3+ Kg7 33. Qxc6 Rxe2+ 34. Kf3 Re7 35. Qd6 Rf7+ 36. Kg2 Bc7 37. Qd5 Rc2 38. a4 Rxd2+ 39. Kh3 Rc2 40. a5 Bxa5 41. Qe5+ Kh6 42. g4 Rf3+ 43. Kh4 Rxh2+ 44. Qxh2 g5# 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.02"]
[Round "13"]
[White "Eliskases, Erich"]
[Black "Lombardy, William James"]
[Result "0-1"]
[ECO "E69"]
[EventDate "1957.03.15"]
[PlyCount "82"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nbd7 7. Nc3 e5 8. e4 exd4 9. Nxd4 Re8 10. h3 Nc5 11. Re1 a5 12. Qc2 c6 13. Be3 Nfd7 14. b3 Qb6 15. Red1 Nf8 16. Rac1 Qc7 17. Qd2 Nfd7 18. Bh6 Nf6 19. Bxg7 Kxg7 20. Nf5+ Bxf5 21. exf5 Rad8 22. Re1 Rd7 23. Rxe8 Nxe8 24. a3 Re7 25. b4 axb4 26. axb4 Nd7 27. Ne4 Ndf6 28. Nxf6 Nxf6 29. Rd1 d5 30. cxd5 cxd5 31. fxg6 hxg6 32. Bxd5 Rd7 33. Qb2 Qd8 34. g4 Kh7 35. Qe5 Rxd5 36. Rxd5 Nxd5 37. Qd4 Qd7 38. h4 Qe6 39. Kg2 Nf6 40. f3 Nd5 41. Kf2 Qb6 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.02"]
[Round "13"]
[White "Esposito, Alfredo H"]
[Black "Mangini, Jose Thiago"]
[Result "1-0"]
[ECO "D52"]
[EventDate "1957.03.15"]
[PlyCount "92"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Nbd7 5. Bg5 c6 6. cxd5 exd5 7. e3 Qa5 8. Bd3 Ne4 9. O-O Nxg5 10. Nxg5 Qd8 11. f4 Nf6 12. e4 dxe4 13. Bc4 Nd5 14. Qb3 h6 15. Ngxe4 Be7 16. Nxd5 cxd5 17. Bxd5 O-O 18. f5 Bf6 19. Rad1 Rb8 20. Qg3 Bd7 21. Qg6 Bc6 22. Nxf6+ Qxf6 23. Bb3 Be4 24. Qxf6 gxf6 25. Rde1 Rfe8 26. Re3 Kf8 27. Rf4 Bc6 28. Rxe8+ Rxe8 29. Kf2 Bb5 30. Bd1 Bc4 31. a3 Rc8 32. Ke3 Bd5 33. Bf3 Bxf3 34. Rxf3 Ke7 35. Kd3 Rc1 36. Re3+ Kd6 37. Rh3 Rg1 38. g3 Rf1 39. g4 Rf4 40. Rxh6 Rxg4 41. Rxf6+ Ke7 42. Rh6 Rf4 43. Rh8 Rxf5 44. h4 Rb5 45. b4 f5 46. Rh7+ Ke8 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.02"]
[Round "13"]
[White "Incutto, Carlos"]
[Black "Kotov, Alexander"]
[Result "0-1"]
[ECO "A42"]
[EventDate "1957.03.15"]
[PlyCount "54"]

1. e4 g6 2. d4 Bg7 3. c4 d6 4. Nc3 Nc6 5. d5 Nd4 6. Be3 e5 7. Nge2 Nxe2 8. Bxe2 f5 9. f3 Nf6 10. O-O O-O 11. b4 Rf7 12. c5 f4 13. Bf2 g5 14. Rc1 Bf8 15. Rc2 Rg7 16. Qd2 g4 17. cxd6 g3 18. hxg3 fxg3 19. Be3 Nh5 20. Rfc1 Qh4 21. Bb5 Qh2+ 22. Kf1 Qh1+ 23. Bg1 Nf4 24. d7 Rxd7 25. Nd1 Rf7 26. Qe1 Rg7 27. Qd2 Nxg2 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.02"]
[Round "13"]
[White "Najdorf, Miguel"]
[Black "Sanguineti, Raul"]
[Result "1-0"]
[ECO "D94"]
[EventDate "1957.03.15"]
[PlyCount "49"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 g6 5. Nc3 Bg7 6. Bd3 O-O 7. O-O Bf5 8. Bxf5 gxf5 9. b3 Ne4 10. Bb2 e6 11. Ne2 Nd7 12. Rc1 Re8 13. Nf4 Bf8 14. Ne1 f6 15. cxd5 cxd5 16. Ned3 Rc8 17. Rxc8 Qxc8 18. Qh5 Nb8 19. Rc1 Nc6 20. g4 fxg4 21. Qxg4+ Kh8 22. Kh1 Qd7 23. f3 Ng5 24. Rg1 Qg7 25. Qh5 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.02"]
[Round "13"]
[White "Panno, Oscar"]
[Black "Keres, Paul"]
[Result "0-1"]
[ECO "A23"]
[EventDate "1957.03.15"]
[PlyCount "74"]

1. c4 Nf6 2. Nc3 e5 3. g3 c6 4. Nf3 e4 5. Nd4 d5 6. cxd5 cxd5 7. Bg2 Nc6 8. Nxc6 bxc6 9. d3 exd3 10. Qxd3 Be7 11. O-O O-O 12. Be3 Re8 13. Rfd1 Be6 14. Rac1 Ng4 15. Bd2 Qb6 16. Be1 Qxb2 17. e4 Ne5 18. Qd4 Bf6 19. Qa4 Bg4 20. Rb1 Bxd1 21. Qxd1 Qa3 22. exd5 Rad8 23. Qc2 Qc5 24. Qb3 cxd5 25. Nxd5 Ng4 26. Nxf6+ Nxf6 27. Bb4 Qf5 28. Rc1 Re2 29. Bf3 Ree8 30. Rc5 Re5 31. Rxe5 Qxe5 32. Kg2 h5 33. Bc3 Qf5 34. Qc4 h4 35. gxh4 Rd3 36. Be2 Qh3+ 37. Kg1 Rxc3 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.02"]
[Round "13"]
[White "Rubio Aguado, Fernando"]
[Black "Rossetto, Hector Decio"]
[Result "1-0"]
[ECO "A56"]
[EventDate "1957.03.15"]
[PlyCount "99"]

1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 a6 6. h3 Be7 7. Bd3 Nbd7 8. Be3 h5 9. Nf3 h4 10. a4 Nh5 11. Ne2 g5 12. g4 hxg3 13. fxg3 Nf8 14. Qd2 g4 15. hxg4 Bxg4 16. Rf1 Bh3 17. Rg1 Rg8 18. O-O-O Bd7 19. Nc3 Qa5 20. Bg5 Bxg5 21. Nxg5 Bxa4 22. Rdf1 f6 23. Ne6 Nxe6 24. dxe6 O-O-O 25. Nd5 Qxd2+ 26. Kxd2 Kb8 27. g4 Nf4 28. e7 Rc8 29. Nxf4 exf4 30. Rxf4 Rce8 31. Rxf6 Rxe7 32. Rxd6 Bc6 33. Ke3 Kc7 34. Rf6 b5 35. Rf4 Be8 36. g5 b4 37. Rf5 Kb6 38. Rf6+ Kb7 39. Kf4 Rd7 40. Rg3 a5 41. b3 Rd4 42. Rf5 Kb6 43. Rd5 a4 44. Rxd4 cxd4 45. bxa4 Bxa4 46. g6 b3 47. g7 b2 48. e5 Bb3 49. Rg2 Kc5 50. Rxb2 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.02"]
[Round "13"]
[White "Wexler, Bernardo"]
[Black "Casas, Fernando"]
[Result "0-1"]
[ECO "A16"]
[EventDate "1957.03.15"]
[PlyCount "66"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 d6 6. Nc3 Nc6 7. h3 h6 8. d4 a6 9. Be3 Rb8 10. Rc1 e5 11. Qd2 Kh7 12. Rfd1 Bf5 13. g4 Ne4 14. Nxe4 Bxe4 15. dxe5 dxe5 16. Ng5+ hxg5 17. Bxe4 Nd4 18. Kg2 Bf6 19. h4 gxh4 20. g5 h3+ 21. Kxh3 Bg7 22. Rh1 Kg8 23. f3 Ne6 24. Bd3 Qe7 25. Kg2 Rfd8 26. Qe1 Nf4+ 27. Bxf4 exf4 28. Rh4 Qxg5+ 29. Rg4 Qe5 30. b3 c6 31. Be4 f5 32. Rg5 Qe7 33. Qh4 fxe4 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.03"]
[Round "14"]
[White "Ader Hausman, Walter"]
[Black "Wexler, Bernardo"]
[Result "1/2-1/2"]
[ECO "A53"]
[EventDate "1957.03.15"]
[PlyCount "69"]

1. c4 e5 2. Nc3 d6 3. Nf3 Bg4 4. e3 Nd7 5. Be2 Ngf6 6. O-O Be7 7. d4 O-O 8. b3 c6 9. Qc2 Re8 10. Bb2 Bf8 11. dxe5 dxe5 12. Rad1 Qc7 13. Ne4 Nxe4 14. Qxe4 Nf6 15. Qc2 Bc5 16. h3 Bh5 17. Nh4 Bg6 18. Nxg6 hxg6 19. a3 a5 20. Rd3 Qe7 21. Qc1 Ne4 22. Kh2 Bd6 23. Rdd1 f5 24. f3 Nf6 25. g4 e4+ 26. f4 Rad8 27. g5 Nh7 28. h4 Nf8 29. Kg2 Ne6 30. Rh1 Qc7 31. Rhf1 Bc5 32. Qc3 Qb6 33. Bc1 Bf8 34. Rxd8 Rxd8 35. Rd1 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.03"]
[Round "14"]
[White "Casas, Fernando"]
[Black "Esposito, Alfredo H"]
[Result "1/2-1/2"]
[ECO "A13"]
[EventDate "1957.03.15"]
[PlyCount "80"]

1. c4 e6 2. g3 d5 3. Bg2 Nf6 4. Nf3 dxc4 5. Qa4+ Bd7 6. Qxc4 Bc6 7. O-O Nbd7 8. b3 Be7 9. Bb2 a5 10. Na3 Nb6 11. Qc2 a4 12. d3 O-O 13. e4 Rc8 14. Rad1 axb3 15. axb3 Ra8 16. Qc1 Qb8 17. Ne5 Be8 18. Nac4 Nfd7 19. Ng4 f6 20. Nge3 Bf7 21. d4 Nxc4 22. bxc4 b5 23. e5 Ra2 24. Be4 bxc4 25. Nxc4 f5 26. Bg2 Nb6 27. Ne3 Na4 28. Ba1 Nb6 29. d5 Nxd5 30. Bxd5 exd5 31. Nxf5 Ba3 32. Qg5 Bg6 33. Ne3 c6 34. e6 Qd6 35. h4 Qxe6 36. Rde1 Be7 37. Nxd5 Bxg5 38. Rxe6 cxd5 39. hxg5 Re8 40. Rxe8+ Bxe8 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.03"]
[Round "14"]
[White "Keres, Paul"]
[Black "Albert, E."]
[Result "1-0"]
[ECO "B88"]
[EventDate "1957.03.15"]
[PlyCount "65"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. O-O a6 8. Be3 Qc7 9. Bd3 Be7 10. f4 Bd7 11. Qf3 O-O 12. Rae1 b5 13. a3 Na5 14. g4 e5 15. Nf5 Bxf5 16. exf5 Qc6 17. g5 Qxf3 18. Rxf3 Nd7 19. Nd5 Bd8 20. b3 Nc6 21. f6 exf4 22. Rxf4 Nde5 23. Be4 Rb8 24. Rd1 g6 25. h4 Re8 26. Kf2 a5 27. Rh1 Rb7 28. Bg2 Kf8 29. h5 Rd7 30. Rfh4 Kg8 31. Nf4 Bc7 32. hxg6 fxg6 33. Bd5+ 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.03"]
[Round "14"]
[White "Kotov, Alexander"]
[Black "Eliskases, Erich"]
[Result "1-0"]
[ECO "A11"]
[EventDate "1957.03.15"]
[PlyCount "81"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. c4 c6 6. b3 d5 7. Bb2 Nbd7 8. Na3 a5 9. cxd5 Nxd5 10. Bxg7 Kxg7 11. Nc4 N5b6 12. Qc2 Qc7 13. Qc3+ Kg8 14. Qe3 Re8 15. h4 Nd5 16. Qg5 f6 17. Qh6 e5 18. e4 Ne7 19. h5 Nf8 20. hxg6 hxg6 21. Nh2 Be6 22. f4 Nh7 23. Bh3 Bxc4 24. bxc4 Kh8 25. Ng4 Rf8 26. Rf2 exf4 27. gxf4 f5 28. Ne5 Rf6 29. Rg2 fxe4 30. Re1 Raf8 31. Rxe4 g5 32. Qh5 Rxf4 33. Rxf4 Rxf4 34. Rxg5 Qb6+ 35. Kh2 Rf2+ 36. Bg2 Rf8 37. Qh6 Nf5 38. Rxf5 Rxf5 39. Ng6+ Kg8 40. Ne7+ Kh8 41. Nxf5 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.03"]
[Round "14"]
[White "Lombardy, William James"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "E67"]
[EventDate "1957.03.15"]
[PlyCount "81"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nbd7 7. Qc2 e5 8. Rd1 Re8 9. Nc3 c6 10. b3 Qe7 11. Rb1 a6 12. dxe5 dxe5 13. Ng5 Nf8 14. Nge4 Nxe4 15. Nxe4 Bf5 16. Qc3 Ne6 17. Qa5 Bf8 18. Be3 Bg7 19. Bb6 Bxe4 20. Bxe4 f5 21. Bg2 e4 22. Rd2 Bh6 23. Rdd1 Rf8 24. Qe5 Rae8 25. Qd6 Qf6 26. Qa3 Rf7 27. Qb2 Qe7 28. b4 Bg7 29. Qc2 c5 30. Bxc5 Nxc5 31. bxc5 Qxc5 32. e3 b5 33. Rbc1 Rc8 34. Bf1 Qa3 35. Qb3 Bf8 36. Rb1 Qxb3 37. axb3 b4 38. Ra1 Ra7 39. Ra5 Bc5 40. Rd5 Bb6 41. Ra4 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.03"]
[Round "14"]
[White "Mangini, Jose Thiago"]
[Black "Cuellar Gacharna, Miguel"]
[Result "1/2-1/2"]
[ECO "B08"]
[EventDate "1957.03.15"]
[PlyCount "68"]

1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. Bc4 Nf6 5. Nc3 O-O 6. O-O Bg4 7. h3 Bxf3 8. Qxf3 Nc6 9. Ne2 e5 10. d5 Ne7 11. g4 h5 12. Kg2 Qd7 13. Bg5 hxg4 14. hxg4 Nh7 15. Bd2 f5 16. gxf5 gxf5 17. Qh3 Nf6 18. Ng3 Kf7 19. f4 Rh8 20. fxe5 dxe5 21. d6+ Ke8 22. Nxf5 Nxf5 23. Qxf5 Qxf5 24. exf5 cxd6 25. Rh1 Ke7 26. Bg5 Rac8 27. Rxh8 Bxh8 28. Bb3 d5 29. Bxd5 Rxc2+ 30. Kf3 Rxb2 31. Rh1 Bg7 32. Bb3 e4+ 33. Kg3 Kd7 34. Bxf6 Bxf6 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.03"]
[Round "14"]
[White "Panno, Oscar"]
[Black "Rubio Aguado, Fernando"]
[Result "1-0"]
[ECO "A74"]
[EventDate "1957.03.15"]
[PlyCount "83"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Be2 Bg7 8. Nf3 O-O 9. Bg5 a6 10. a4 Qc7 11. O-O Ne8 12. Nd2 f5 13. f4 Nd7 14. exf5 gxf5 15. Bd3 Bd4+ 16. Kh1 Ndf6 17. Qf3 Qf7 18. Nc4 Rb8 19. Nb6 Ng4 20. h3 h6 21. Bh4 Qh5 22. Qg3 Nef6 23. hxg4 fxg4 24. Ne2 Bf5 25. Bxf5 Qxf5 26. Nxd4 cxd4 27. Bxf6 Rxf6 28. Rae1 h5 29. Kg1 Rh6 30. Qh4 Rg6 31. Re6 Rxe6 32. dxe6 Re8 33. Qg5+ Qxg5 34. fxg5 Rxe6 35. Kf2 Kg7 36. Rd1 Re4 37. Kg3 Kg6 38. Kh4 Re2 39. Rxd4 Rxg2 40. Rxd6+ Kf5 41. Rf6+ Ke4 42. Kxh5 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.03"]
[Round "14"]
[White "Rossetto, Hector Decio"]
[Black "Incutto, Carlos"]
[Result "1-0"]
[ECO "B66"]
[EventDate "1957.03.15"]
[PlyCount "59"]

1. e4 c5 2. Ne2 Nc6 3. Nbc3 Nf6 4. d4 cxd4 5. Nxd4 d6 6. Bg5 e6 7. Qd2 a6 8. O-O-O h6 9. Bf4 Bd7 10. Nxc6 Bxc6 11. f3 d5 12. Qe1 Be7 13. exd5 exd5 14. Bd3 O-O 15. Ne2 Re8 16. g4 Nd7 17. Qg3 Bh4 18. Qg1 Bf6 19. h4 Qb6 20. Qxb6 Nxb6 21. g5 hxg5 22. hxg5 Be5 23. Bxe5 Rxe5 24. f4 Re3 25. Nd4 Bd7 26. Bh7+ Kf8 27. Bf5 Be8 28. Bc8 g6 29. Bxb7 Ra7 30. Rh8+ 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.03"]
[Round "14"]
[White "Sanguineti, Raul"]
[Black "Behrensen, Jorge"]
[Result "1/2-1/2"]
[ECO "B66"]
[EventDate "1957.03.15"]
[PlyCount "80"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8. O-O-O h6 9. Bf4 Bd7 10. Bg3 Be7 11. Be2 O-O 12. Bxd6 Bxd6 13. Nxc6 Bxc6 14. Qxd6 Nxe4 15. Nxe4 Bxe4 16. Qxd8 Rfxd8 17. Rxd8+ Rxd8 18. f3 Bc6 19. Rd1 Rxd1+ 20. Kxd1 Kf8 21. Kd2 Ke7 22. b4 g5 23. Ke3 f5 24. c4 b6 25. a3 Kd6 26. Kd4 e5+ 27. Kd3 f4 28. Bd1 a5 29. Kd2 axb4 30. axb4 e4 31. fxe4 Bxe4 32. Bf3 Ke5 33. Kc3 g4 34. Bxe4 Kxe4 35. c5 bxc5 36. bxc5 Kd5 37. Kd3 Kxc5 38. Ke4 f3 39. gxf3 gxf3 40. Kxf3 Kd6 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.05"]
[Round "15"]
[White "Albert, E."]
[Black "Mangini, Jose Thiago"]
[Result "1/2-1/2"]
[ECO "C99"]
[EventDate "1957.03.15"]
[PlyCount "69"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. h3 O-O 9. c3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Re8 13. Nf1 cxd4 14. cxd4 Bb7 15. Ng3 Rac8 16. Re2 h6 17. d5 Nc4 18. Bd3 Nd7 19. Rc2 Qa5 20. Nf5 Bf8 21. Nd2 Nxd2 22. Bxd2 Qd8 23. Qg4 Kh7 24. Rac1 Rxc2 25. Bxc2 g6 26. Ng3 Bc8 27. Qe2 Nb6 28. b3 Bd7 29. Qe3 Nc8 30. Qe1 Ne7 31. Bd3 Qb8 32. h4 Rc8 33. h5 Rxc1 34. hxg6+ fxg6 35. Qxc1 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.05"]
[Round "15"]
[White "Behrensen, Jorge"]
[Black "Lombardy, William James"]
[Result "1/2-1/2"]
[ECO "E65"]
[EventDate "1957.03.15"]
[PlyCount "80"]

1. Nf3 Nf6 2. g3 c5 3. Bg2 g6 4. O-O Bg7 5. c4 O-O 6. d4 d6 7. Nc3 Nc6 8. dxc5 dxc5 9. Be3 Qa5 10. Nd5 Ne4 11. Nd2 Nxd2 12. Bxd2 Qd8 13. Bc3 Ne5 14. Qb3 e6 15. Nf4 Qc7 16. Rfd1 Rb8 17. Nd3 b6 18. Nxe5 Bxe5 19. Rd2 Bxc3 20. Qxc3 Rd8 21. Rad1 Ba6 22. b3 Rxd2 23. Qxd2 b5 24. cxb5 Bxb5 25. Bf3 Bc6 26. Qc3 Bxf3 27. exf3 Rc8 28. Rc1 a5 29. Kg2 Qb6 30. Qc4 Qb4 31. Qe2 Rd8 32. Rc4 Qb6 33. Qe5 Rc8 34. h4 h5 35. g4 hxg4 36. Rxg4 Rd8 37. Rc4 Rd5 38. Qc3 Qb5 39. a3 Kh7 40. Qf6 Rf5 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.05"]
[Round "15"]
[White "Cuellar Gacharna, Miguel"]
[Black "Casas, Fernando"]
[Result "1/2-1/2"]
[ECO "E60"]
[EventDate "1957.03.15"]
[PlyCount "81"]

1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nc6 7. d5 Na5 8. Nbd2 c5 9. e4 a6 10. Re1 b5 11. h3 Rb8 12. e5 Nd7 13. exd6 exd6 14. cxb5 axb5 15. Ne4 Nc4 16. Bg5 f6 17. Bf4 Nde5 18. Nxe5 Nxe5 19. Bxe5 fxe5 20. Qd2 Bf5 21. a4 bxa4 22. Rxa4 Qb6 23. Rb1 Rfc8 24. g4 Bxe4 25. Bxe4 Rf8 26. Kg2 Rf4 27. f3 Bh6 28. Qe2 Qb3 29. Ra6 Rb4 30. Ra3 Rbxe4 31. fxe4 Qb4 32. Ra8+ Kg7 33. Ra7+ Kg8 34. Re1 Bg5 35. Rc7 Bh4 36. Ra1 Qb8 37. Raa7 Qf8 38. Rg7+ Qxg7 39. Rxg7+ Kxg7 40. Qa6 Be7 41. Qa7 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.05"]
[Round "15"]
[White "Eliskases, Erich"]
[Black "Rossetto, Hector Decio"]
[Result "1/2-1/2"]
[ECO "E65"]
[EventDate "1957.03.15"]
[PlyCount "51"]

1. Nf3 Nf6 2. c4 c5 3. g3 Nc6 4. Bg2 g6 5. O-O Bg7 6. d4 d6 7. dxc5 dxc5 8. Qxd8+ Nxd8 9. Nc3 O-O 10. Be3 b6 11. Rad1 Bb7 12. Bc1 Ne6 13. Ng5 Bxg2 14. Kxg2 Nd4 15. Nf3 Rfd8 16. b3 Ng4 17. Nxd4 cxd4 18. Nd5 e6 19. Nf4 Nf6 20. f3 Rac8 21. Nd3 b5 22. cxb5 Nd5 23. a4 Rc3 24. Bd2 Rxb3 25. Rb1 Rxb1 26. Rxb1 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.05"]
[Round "15"]
[White "Esposito, Alfredo H"]
[Black "Ader Hausman, Walter"]
[Result "1-0"]
[ECO "D75"]
[EventDate "1957.03.15"]
[PlyCount "83"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nf3 d5 6. cxd5 Nxd5 7. O-O c5 8. dxc5 Na6 9. Ng5 Ndb4 10. Nc3 Qxd1 11. Rxd1 Nc2 12. Rb1 Nxc5 13. Nd5 Bg4 14. f3 Be6 15. Nxe6 fxe6 16. Nc3 Rfd8 17. Bg5 Kf7 18. Rxd8 Rxd8 19. Rd1 Rc8 20. h4 b5 21. Nxb5 Rb8 22. Rc1 Nd4 23. Nxd4 Bxd4+ 24. e3 Nd3 25. exd4 Nxc1 26. Bxc1 Rb4 27. Kf2 Rc4 28. Bd2 Rc2 29. Ke2 Rxb2 30. a4 a5 31. f4 Kf6 32. g4 Rb3 33. Bxa5 Ra3 34. Bc6 h5 35. gxh5 gxh5 36. Bb4 Rb3 37. Bc5 Kf5 38. a5 Kxf4 39. a6 Rb2+ 40. Kd3 Ra2 41. a7 e5 42. a8=Q 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.05"]
[Round "15"]
[White "Incutto, Carlos"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "B94"]
[EventDate "1957.03.15"]
[PlyCount "65"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. Be2 Qc7 8. a4 e6 9. O-O Be7 10. Nb3 b6 11. Be3 Bb7 12. f3 O-O 13. Qe1 Nc5 14. Qg3 Rfc8 15. a5 b5 16. Nxc5 dxc5 17. Qxc7 Rxc7 18. Rfd1 Kf8 19. Bf4 Rd7 20. Rxd7 Nxd7 21. Rd1 Ke8 22. Nxb5 axb5 23. Bxb5 Bc8 24. Bc7 Bd8 25. Bc6 Ra6 26. Bb5 Ra7 27. Bd6 Rxa5 28. c4 Be7 29. Bc7 Ra2 30. Rd2 Bf6 31. e5 Bg5 32. Re2 Bc1 33. Bd6 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.05"]
[Round "15"]
[White "Najdorf, Miguel"]
[Black "Kotov, Alexander"]
[Result "1-0"]
[ECO "E55"]
[EventDate "1957.03.15"]
[PlyCount "55"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd3 c5 7. O-O dxc4 8. Bxc4 Nbd7 9. Qe2 a6 10. a4 Nb6 11. Bb3 cxd4 12. exd4 Bd7 13. Rd1 Rc8 14. Rd3 Nbd5 15. Nxd5 Nxd5 16. Qe4 Bc6 17. Ne5 Nf6 18. Qh4 Bd5 19. Bg5 Be7 20. Rh3 Re8 21. Bd1 Qa5 22. Bh5 Red8 23. Bxf7+ Kf8 24. Bh6 Ne8 25. Qf4 Bf6 26. Bxg7+ Ke7 27. Bxe8 Bxg7 28. Rxh7 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.05"]
[Round "15"]
[White "Rubio Aguado, Fernando"]
[Black "Keres, Paul"]
[Result "1/2-1/2"]
[ECO "E43"]
[EventDate "1957.03.15"]
[PlyCount "82"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 b6 6. e3 Bb7 7. Nf3 Ne4 8. Qc2 f5 9. Bd3 O-O 10. O-O Nd6 11. Ne5 Nc6 12. Nxc6 Bxc6 13. f3 Bb7 14. Qe2 Qe7 15. a4 e5 16. Ba3 e4 17. fxe4 fxe4 18. Bc2 Ba6 19. Bb3 Rxf1+ 20. Rxf1 Qe6 21. Bxd6 cxd6 22. Qa2 Kh8 23. c5 Qe8 24. Rf4 dxc5 25. Bd5 Rc8 26. Bf7 Qe7 27. d5 Rf8 28. Qf2 g6 29. c4 Qe5 30. h3 Kg7 31. d6 Bb7 32. h4 Bc6 33. h5 Bxa4 34. h6+ Kxh6 35. Qh4+ Kg7 36. Qe7 Qxf4 37. exf4 Rxf7 38. Qxe4 h5 39. g3 Bc6 40. Qe5+ Kh7 41. Qe8 Kg7 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.05"]
[Round "15"]
[White "Wexler, Bernardo"]
[Black "Sanguineti, Raul"]
[Result "0-1"]
[ECO "A04"]
[EventDate "1957.03.15"]
[PlyCount "76"]

1. Nf3 c5 2. g3 Nc6 3. Bg2 g6 4. O-O Bg7 5. e4 e5 6. d3 Nge7 7. c4 a6 8. Nc3 Rb8 9. Ne1 d6 10. Nc2 b5 11. Ne3 O-O 12. Ned5 Nxd5 13. Nxd5 Ne7 14. Nxe7+ Qxe7 15. b3 f5 16. Bd2 f4 17. g4 Qh4 18. f3 Bd7 19. Rb1 h5 20. Be1 Qe7 21. h3 Bf6 22. Kf2 Bh4+ 23. Ke2 Bg3 24. Kd2 a5 25. Kc2 a4 26. Bc3 Bc6 27. bxa4 b4 28. Bd2 Bxa4+ 29. Rb3 Ra8 30. Bc1 Bxb3+ 31. axb3 Ra1 32. Qd2 Qa7 33. Bb2 Rxf1 34. Bxf1 Ra8 35. gxh5 gxh5 36. h4 Qe7 37. Kb1 Qxh4 38. d4 cxd4 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.06"]
[Round "16"]
[White "Ader Hausman, Walter"]
[Black "Cuellar Gacharna, Miguel"]
[Result "0-1"]
[ECO "B28"]
[EventDate "1957.03.15"]
[PlyCount "86"]

1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nb3 Bb4 7. Bd3 d5 8. exd5 Nxd5 9. O-O Nxc3 10. bxc3 Bxc3 11. Ba3 Bxa1 12. Qxa1 Nc6 13. Rd1 Qg5 14. Be4 Ne7 15. Qc3 O-O 16. Qc7 Ng6 17. Bxf8 Bg4 18. Be7 Qxe7 19. Qxe7 Nxe7 20. f3 Bf5 21. Bxb7 Rb8 22. c4 Ng6 23. Na5 h5 24. c5 Nf4 25. c6 Ne6 26. Rd7 Nc5 27. Re7 Rd8 28. c7 Rd1+ 29. Kf2 Kf8 30. Ke2 Kxe7 31. Kxd1 Nxb7 32. Nxb7 Bc8 33. Nc5 Kd6 34. Nd3 f6 35. Kd2 Kxc7 36. Ke3 Kd6 37. f4 Bb7 38. g3 g5 39. fxe5+ fxe5 40. h4 g4 41. Nf2 Bf3 42. Kd3 Kd5 43. Ke3 e4 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.06"]
[Round "16"]
[White "Casas, Fernando"]
[Black "Albert, E."]
[Result "0-1"]
[ECO "B03"]
[EventDate "1957.03.15"]
[PlyCount "78"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. exd6 exd6 5. c4 Nf6 6. Bd3 Be7 7. h3 O-O 8. Nf3 d5 9. b3 Bb4+ 10. Kf1 c5 11. a3 Ba5 12. Bb2 dxc4 13. Bxc4 Nc6 14. Nbd2 cxd4 15. b4 Bb6 16. Nb3 Bf5 17. b5 Na5 18. Nxa5 Bxa5 19. Nxd4 Bg6 20. h4 Rc8 21. Be2 Bc3 22. Bxc3 Rxc3 23. h5 Be4 24. Qd2 Qc7 25. b6 axb6 26. h6 Rc8 27. f3 Qc5 28. Rd1 Bg6 29. Rh4 Nd5 30. Nf5 Bxf5 31. Qxd5 Re8 32. Bc4 Qxd5 33. Rxd5 Be6 34. Re5 Rxc4 35. f4 Rc1+ 36. Kf2 gxh6 37. f5 Bd7 38. Rd5 Bc6 39. Rd2 f6 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.06"]
[Round "16"]
[White "Keres, Paul"]
[Black "Mangini, Jose Thiago"]
[Result "1-0"]
[ECO "C86"]
[EventDate "1957.03.15"]
[PlyCount "61"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6 8. a4 Rb8 9. axb5 axb5 10. c3 O-O 11. d4 exd4 12. cxd4 Bg4 13. Rd1 d5 14. e5 Ne4 15. h3 Bh5 16. Nc3 Nxc3 17. bxc3 Qd7 18. g4 Bg6 19. Ne1 h5 20. Ng2 hxg4 21. Nf4 Bf5 22. hxg4 Bxg4 23. f3 Bf5 24. Bxd5 Nd8 25. Be4 Ne6 26. Bxf5 Nxf4 27. Qc2 Ne6 28. d5 Bc5+ 29. Kh1 Qe7 30. dxe6 fxe6 31. Bh7+ 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.06"]
[Round "16"]
[White "Kotov, Alexander"]
[Black "Behrensen, Jorge"]
[Result "1-0"]
[ECO "A16"]
[EventDate "1957.03.15"]
[PlyCount "81"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. Rb1 d6 6. Nf3 e5 7. b4 Bf5 8. d3 Qc8 9. h3 e4 10. Nh4 exd3 11. Nxf5 Qxf5 12. Bxb7 dxe2 13. Qxe2 Nbd7 14. Bxa8 Rxa8 15. Kf1 h5 16. Kg2 Re8 17. Qf3 Qe6 18. Nd5 Ne5 19. Nxf6+ Bxf6 20. Qe4 Nxc4 21. Qxe6 Rxe6 22. Kf3 Bd4 23. Rd1 c5 24. Bf4 Rf6 25. h4 Kg7 26. Rbc1 Ne5+ 27. Kg2 Nc6 28. Rxd4 Nxd4 29. bxc5 Re6 30. cxd6 Ne2 31. Rd1 Nxf4+ 32. Kf3 Re8 33. Kxf4 Kf6 34. d7 Rd8 35. Rd6+ Ke7 36. Ke5 a5 37. a4 Rxd7 38. Rxd7+ Kxd7 39. Kd5 f6 40. Kc5 Ke6 41. Kb5 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.06"]
[Round "16"]
[White "Lombardy, William James"]
[Black "Wexler, Bernardo"]
[Result "1-0"]
[ECO "E67"]
[EventDate "1957.03.15"]
[PlyCount "83"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nbd7 7. Qc2 e5 8. Rd1 Re8 9. Nc3 c6 10. b3 a6 11. dxe5 dxe5 12. Ng5 Qc7 13. Ba3 Bf8 14. Bxf8 Nxf8 15. Nge4 Nxe4 16. Nxe4 Rd8 17. Rxd8 Qxd8 18. Rd1 Qe7 19. Qc3 Bf5 20. Nd6 Rd8 21. c5 f6 22. b4 Be6 23. Rd2 Bf7 24. e3 Ne6 25. f4 Ng7 26. fxe5 fxe5 27. Bf1 Ne8 28. Nxf7 Rxd2 29. Nh6+ Kg7 30. Qxd2 Kxh6 31. Bh3 a5 32. a3 Kg7 33. Bc8 Qc7 34. Be6 axb4 35. Qxb4 Nf6 36. Qb6 Qxb6 37. cxb6 Ne4 38. a4 Nc5 39. a5 Kf6 40. Bc8 Ke7 41. Bxb7 Kd7 42. a6 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.06"]
[Round "16"]
[White "Panno, Oscar"]
[Black "Eliskases, Erich"]
[Result "1-0"]
[ECO "A07"]
[EventDate "1957.03.15"]
[PlyCount "99"]

1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. g3 Be7 5. Bg2 O-O 6. Ngf3 c6 7. O-O b5 8. Re1 Bb7 9. e5 Nfd7 10. Nf1 Re8 11. h4 Nf8 12. N1h2 c5 13. Ng4 Nc6 14. h5 Rc8 15. h6 g6 16. a4 b4 17. Be3 Nd7 18. Qc1 Ba6 19. Qd2 Na5 20. Bg5 c4 21. Bxe7 Qxe7 22. Nd4 Rb8 23. dxc4 Nxc4 24. Qf4 Bb7 25. b3 Na5 26. Bf1 a6 27. Bd3 Rec8 28. Re3 Nc6 29. Nf3 Rc7 30. Ng5 Rbc8 31. Rae1 Nd8 32. R3e2 Rc3 33. Kh2 R8c7 34. Kg1 Bc8 35. Rd2 R3c6 36. Nf3 Rb6 37. Qe3 Rb8 38. Bf1 Rc3 39. Bd3 Nc6 40. Qf4 Bb7 41. Ng5 Bc8 42. Bf1 Ra8 43. Rxd5 exd5 44. e6 fxe6 45. Rxe6 Qf8 46. Qxf8+ Kxf8 47. Nxh7+ Kg8 48. Ng5 Bb7 49. Rxg6+ Kf8 50. h7 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.06"]
[Round "16"]
[White "Rossetto, Hector Decio"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "A15"]
[EventDate "1957.03.15"]
[PlyCount "91"]

1. c4 Nf6 2. Nf3 g6 3. b3 Bg7 4. Bb2 O-O 5. g3 d6 6. Bg2 Bd7 7. O-O Qc8 8. Re1 Bh3 9. d3 e5 10. Nbd2 Bxg2 11. Kxg2 Nc6 12. a3 Nh5 13. Qc2 f5 14. e3 f4 15. d4 Qg4 16. h3 Qd7 17. dxe5 fxg3 18. fxg3 Nxe5 19. Nxe5 Bxe5 20. Bxe5 dxe5 21. Rad1 Nf6 22. b4 Qc6+ 23. e4 a5 24. Nf3 axb4 25. axb4 Nh5 26. Ra1 Rae8 27. c5 Kg7 28. Qc3 Re7 29. Rad1 Kg8 30. Qb3+ Kh8 31. Qc3 Qf6 32. Rd5 Rfe8 33. Red1 Qg7 34. Rd8 Nf6 35. Qc4 g5 36. g4 Qg6 37. Rxe8+ Rxe8 38. c6 bxc6 39. Qxc6 Nxe4 40. Qxg6 hxg6 41. Re1 Nf6 42. Rxe5 Rxe5 43. Nxe5 Kg7 44. Kf3 Nd5 45. Nd3 Kf6 46. Ke4 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.06"]
[Round "16"]
[White "Rubio Aguado, Fernando"]
[Black "Incutto, Carlos"]
[Result "1-0"]
[ECO "D48"]
[EventDate "1957.03.15"]
[PlyCount "55"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. O-O a6 10. e4 Be7 11. Qe2 c5 12. Rd1 O-O 13. dxc5 b4 14. Na4 Qa5 15. b3 Bc6 16. e5 Nd5 17. Bg5 Bxg5 18. Bxh7+ Kh8 19. Nxg5 g6 20. Qe4 Kg7 21. Bxg6 Qd8 22. Nxf7 Rxf7 23. Bxf7 Kxf7 24. Qh7+ Ke8 25. Nb6 N7xb6 26. cxb6 Qg5 27. b7 Rb8 28. Qh8+ 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.06"]
[Round "16"]
[White "Sanguineti, Raul"]
[Black "Esposito, Alfredo H"]
[Result "1-0"]
[ECO "A13"]
[EventDate "1957.03.15"]
[PlyCount "135"]

1. c4 e6 2. g3 d5 3. Bg2 Nf6 4. Nf3 dxc4 5. Qa4+ Bd7 6. Qxc4 Bc6 7. O-O Nbd7 8. b3 Bd6 9. Na3 O-O 10. Bb2 Qe7 11. Nc2 Nb6 12. Qh4 Rad8 13. Rfe1 Nfd5 14. Qxe7 Bxe7 15. Ne5 Be8 16. d4 Nb4 17. Nxb4 Bxb4 18. Rec1 c6 19. Nd3 Be7 20. Ne5 Rb8 21. Rc2 Nd7 22. Nd3 Nf6 23. b4 Bd7 24. Nc5 Rfd8 25. a3 Be8 26. e4 Nd7 27. Nd3 Nb6 28. Rd1 Na4 29. Ba1 Bf6 30. Ne1 h6 31. f4 Ra8 32. Nf3 a5 33. bxa5 Rxa5 34. Rb1 b5 35. Bf1 Nb6 36. Rb3 Rda8 37. Bb2 Be7 38. Ne5 Bxa3 39. Nxc6 Bxc6 40. Rxc6 Bxb2 41. Rxb2 Nc4 42. Bxc4 bxc4 43. Rxc4 Ra1+ 44. Kf2 Rh1 45. Kf3 Ra3+ 46. Kg4 Re3 47. Rc8+ Kh7 48. Rc7 Rxe4 49. Rxf7 Rxd4 50. Rbb7 Rxh2 51. Rxg7+ Kh8 52. Rh7+ Kg8 53. Rhe7 Rd8 54. Rxe6 Kh8 55. Ree7 Rg8+ 56. Kf3 Ra8 57. Rh7+ Kg8 58. Kg4 Ra3 59. Rhc7 Ra8 60. Rg7+ Kf8 61. Rh7 Kg8 62. Rbg7+ Kf8 63. Rg6 Ra3 64. Rgxh6 Rg2 65. Rh3 Kg8 66. Re7 Rg1 67. Re2 Kg7 68. Rf2 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.08"]
[Round "17"]
[White "Albert, E."]
[Black "Ader Hausman, Walter"]
[Result "0-1"]
[ECO "A43"]
[EventDate "1957.03.15"]
[PlyCount "76"]

1. d4 c5 2. d5 Nf6 3. Nc3 d6 4. e4 g6 5. Be2 Bg7 6. Nf3 O-O 7. Nd2 a6 8. a4 Nbd7 9. Nc4 b6 10. Bf4 Ne8 11. O-O Rb8 12. Qd2 Ne5 13. Bh6 Nc7 14. Bxg7 Kxg7 15. Ne3 f6 16. f4 Nf7 17. Nc4 Bd7 18. e5 b5 19. axb5 axb5 20. exf6+ exf6 21. Na5 b4 22. Ne4 Re8 23. Ng3 f5 24. Nc4 Bb5 25. Na5 Qf6 26. Bxb5 Nxb5 27. Nc4 Nd4 28. Ra7 h5 29. Rf2 Ra8 30. Rxa8 Rxa8 31. h3 Nh6 32. c3 bxc3 33. bxc3 h4 34. Ne2 Ra1+ 35. Rf1 Nxe2+ 36. Qxe2 Qxc3 37. Nxd6 Rxf1+ 38. Kxf1 Qc1+ 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.08"]
[Round "17"]
[White "Behrensen, Jorge"]
[Black "Rossetto, Hector Decio"]
[Result "0-1"]
[ECO "E98"]
[EventDate "1957.03.15"]
[PlyCount "66"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. d4 d6 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Ne8 10. Nd3 f5 11. f3 b6 12. Bd2 f4 13. b4 g5 14. c5 Rf6 15. Rc1 h5 16. cxd6 cxd6 17. g4 hxg4 18. fxg4 Rh6 19. Ne1 Nf6 20. Ng2 Ng6 21. Be1 Rh3 22. Nb5 Bf8 23. Nc7 Rb8 24. Ne6 Bxe6 25. dxe6 Qe7 26. Qc2 Qh7 27. Bf3 Rxh2 28. Qc7 Rb7 29. Qd8 Re7 30. Qxd6 Qh3 31. Rc2 Rh1+ 32. Kf2 Rxf1+ 33. Kxf1 Qxf3+ 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.08"]
[Round "17"]
[White "Cuellar Gacharna, Miguel"]
[Black "Sanguineti, Raul"]
[Result "1-0"]
[ECO "E46"]
[EventDate "1957.03.15"]
[PlyCount "89"]

1. c4 Nf6 2. Nc3 e6 3. d4 Bb4 4. e3 O-O 5. Nge2 d5 6. a3 Be7 7. cxd5 exd5 8. Nf4 c6 9. Bd3 Nbd7 10. Bd2 Re8 11. Qc2 Nf8 12. O-O Bd6 13. Rfe1 Ne6 14. Nxe6 Bxe6 15. h3 Bc7 16. Rac1 a6 17. f4 g6 18. Na4 Ne4 19. Bxe4 dxe4 20. Nc5 Rb8 21. Nxe6 Rxe6 22. Qb3 Rd6 23. Bb4 Rd7 24. Re2 Qf6 25. Be1 Bd6 26. d5 c5 27. Bc3 Qe7 28. g4 b5 29. g5 c4 30. Qd1 Bc5 31. Rcc2 Qe6 32. Rcd2 Qxh3 33. Rh2 Qxe3+ 34. Kh1 h5 35. gxh6 Kh7 36. Be5 Rb6 37. Kg2 f6 38. Rh3 Qg1+ 39. Qxg1 Bxg1 40. Kxg1 fxe5 41. fxe5 Rb8 42. Re3 Rbd8 43. d6 Re8 44. Rxe4 Re6 45. Kf2 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.08"]
[Round "17"]
[White "Eliskases, Erich"]
[Black "Rubio Aguado, Fernando"]
[Result "1-0"]
[ECO "E64"]
[EventDate "1957.03.15"]
[PlyCount "113"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. d4 d6 6. Nf3 c5 7. d5 Na6 8. O-O Nc7 9. h3 a6 10. a4 Rb8 11. a5 b5 12. axb6 Rxb6 13. Nd2 e6 14. e4 exd5 15. exd5 Rb4 16. Na2 Rb6 17. Nb3 Bf5 18. Na5 Qd7 19. g4 Be4 20. f3 Bxd5 21. cxd5 Nfxd5 22. Nc4 Bd4+ 23. Kh1 Rbb8 24. Nc3 Nxc3 25. bxc3 Bxc3 26. Bh6 Rfd8 27. Rc1 Bd4 28. f4 d5 29. Ne5 Bxe5 30. fxe5 Ne6 31. Qf3 Qe7 32. Qf6 Qxf6 33. exf6 d4 34. Rfd1 Rb3 35. Bd2 g5 36. Bf1 Rf3 37. Bc4 Nf4 38. Bxf4 Rxf4 39. Bd3 Rxf6 40. Rxc5 Rb6 41. Rxg5+ Kf8 42. Bxh7 Ke7 43. Bd3 Rdd6 44. Rf5 Rb7 45. Rdf1 f6 46. Re1+ Kd7 47. Rc5 Rdb6 48. Rc4 a5 49. Rxd4+ Rd6 50. Bf5+ Kc7 51. Rxd6 Kxd6 52. Re6+ Kd5 53. Rxf6 Ke5 54. Ra6 Rb5 55. Be6 Rb2 56. Rxa5+ Kxe6 57. Rf5 1-0

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.08"]
[Round "17"]
[White "Esposito, Alfredo H"]
[Black "Lombardy, William James"]
[Result "1/2-1/2"]
[ECO "E26"]
[EventDate "1957.03.15"]
[PlyCount "59"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3 Qa5 7. Bd2 Ne4 8. Bd3 Nxd2 9. Qxd2 Nc6 10. Nf3 d6 11. O-O h6 12. Qc2 Qc7 13. Nd2 O-O 14. f4 d5 15. cxd5 exd5 16. Nf3 c4 17. Bh7+ Kh8 18. Bf5 Ne7 19. Bxc8 Raxc8 20. f5 Ng8 21. e4 dxe4 22. Qxe4 Nf6 23. Qh4 Qa5 24. Rac1 Qxf5 25. Ne5 Qg5 26. Qh3 Kg8 27. Rb1 Rc7 28. Rf5 Qd2 29. Rf2 Qg5 30. Rf5 1/2-1/2

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.08"]
[Round "17"]
[White "Incutto, Carlos"]
[Black "Keres, Paul"]
[Result "0-1"]
[ECO "C92"]
[EventDate "1957.03.15"]
[PlyCount "50"]

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 a5 10. d4 exd4 11. Nxd4 Nxd4 12. Qxd4 Bb7 13. Bc2 Re8 14. Qd1 Bf8 15. Bg5 h6 16. Bxf6 Qxf6 17. Nd2 b4 18. Qf3 Qg6 19. Qg4 Qf6 20. Qf3 Qg5 21. Nf1 Re5 22. cxb4 axb4 23. Re3 d5 24. exd5 Bxd5 25. Be4 Rxe4 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.08"]
[Round "17"]
[White "Mangini, Jose Thiago"]
[Black "Casas, Fernando"]
[Result "0-1"]
[ECO "C70"]
[EventDate "1957.03.15"]
[PlyCount "104"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Na5 6. d4 exd4 7. Qxd4 Nxb3 8. axb3 Ne7 9. Bg5 f6 10. Bf4 Nc6 11. Qd2 Bb4 12. Nc3 d6 13. O-O Bb7 14. Qd5 Qd7 15. Qh5+ g6 16. Qh6 Bxc3 17. bxc3 Qf7 18. Rfd1 Ne7 19. Rd4 g5 20. Bxd6 cxd6 21. Rxd6 Qg6 22. Rxf6 Qxh6 23. Rxh6 Bxe4 24. Nd4 Kf7 25. Rhxa6 Rxa6 26. Rxa6 Rd8 27. Kf1 b4 28. Ne6 Rg8 29. cxb4 Bxc2 30. Nc5 Rb8 31. Ra2 Bf5 32. Ra4 Nc6 33. Ra6 Nxb4 34. Ra7+ Kg6 35. f3 Nd3 36. Nb7 Bc8 37. Nd6 Be6 38. Ra6 Nb4 39. Ra7 Bxb3 40. g4 Be6 41. Re7 Bd5 42. Kg2 Nd3 43. Ne4 Rb2+ 44. Kg3 Bxe4 45. fxe4 Nf4 46. e5 Re2 47. Kf3 Re3+ 48. Kxe3 Nd5+ 49. Kd4 Nxe7 50. Kc5 Kf7 51. Kd6 Ng6 52. e6+ Kf6 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.08"]
[Round "17"]
[White "Najdorf, Miguel"]
[Black "Panno, Oscar"]
[Result "0-1"]
[ECO "E90"]
[EventDate "1957.03.15"]
[PlyCount "128"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Bg5 c5 7. d5 e6 8. Nd2 h6 9. Bh4 a6 10. a4 Nbd7 11. Be2 Re8 12. f4 Qb6 13. Ra3 e5 14. f5 gxf5 15. exf5 e4 16. a5 Qc7 17. Qc2 e3 18. Nde4 Nxe4 19. Nxe4 Bxb2 20. Rxe3 Qxa5+ 21. Kf1 Bd4 22. Rg3+ Kf8 23. Nxd6 Qa1+ 24. Bd1 Re3 25. Rxe3 Bxe3 26. g4 Qe5 27. Ne4 b5 28. Kg2 bxc4 29. Re1 Rb8 30. Bg3 Bf4 31. Nxc5 Qxd5+ 32. Bf3 Qd2+ 33. Qxd2 Bxd2 34. Bd6+ Kg7 35. Re2 c3 36. Bxb8 Nxb8 37. Re8 c2 38. Nb3 Bd7 39. Rxb8 Ba4 40. Nxd2 c1=Q 41. Ne4 Qc2+ 42. Kh3 Bc6 43. Ng3 Qc3 44. Bxc6 Qxc6 45. Nh5+ Kh7 46. Rf8 Qf3+ 47. Kh4 Qf2+ 48. Kh3 Qe3+ 49. Kg2 Qe7 50. Re8 Qd6 51. h4 a5 52. Kh3 Qd3+ 53. Kg2 Qc2+ 54. Kg3 Qc3+ 55. Kf4 Qd4+ 56. Kg3 Qd6+ 57. Kh3 f6 58. Re6 Qd3+ 59. Kg2 a4 60. Re7+ Kg8 61. Rd7 Qc2+ 62. Kf3 Qc6+ 63. Kf2 a3 64. g5 hxg5 0-1

[Event "15th Mar del Plata it"]
[Site "Mar del Plata ARG"]
[Date "1957.04.08"]
[Round "17"]
[White "Wexler, Bernardo"]
[Black "Kotov, Alexander"]
[Result "1-0"]
[ECO "B08"]
[EventDate "1957.03.15"]
[PlyCount "111"]

1. d4 g6 2. e4 Bg7 3. Nf3 d6 4. Nc3 Nf6 5. h3 c6 6. Bf4 Qb6 7. Rb1 Nbd7 8. e5 dxe5 9. dxe5 Ng8 10. Bc4 Nf8 11. Ng5 Nh6 12. Qe2 Ne6 13. Nxe6 Bxe6 14. Bxe6 fxe6 15. Qc4 Nf7 16. Qxe6 Qd4 17. Bg3 Nxe5 18. Qb3 Qb6 19. O-O Qxb3 20. axb3 Rd8 21. Ne4 b6 22. Rfe1 Nf7 23. Ra1 Rd7 24. Ra6 O-O 25. Rea1 Bxb2 26. Rxa7 Rfd8 27. Rxd7 Rxd7 28. Ra8+ Kg7 29. Rc8 Rd4 30. f3 Rd1+ 31. Kf2 Bd4+ 32. Ke2 Rg1 33. Bf2 Rxg2 34. Kf1 Rxf2+ 35. Nxf2 Ng5 36. Kg2 c5 37. Nd3 e5 38. f4 exf4 39. Nxf4 b5 40. c3 Bxc3 41. Rxc5 Ne4 42. Rxb5 Nd6 43. Rb6 Nf5 44. Kf3 Ba5 45. Rb7+ Kf6 46. b4 Bd8 47. Rd7 Be7 48. b5 Ke5 49. b6 Nd4+ 50. Ke3 Nc6 51. Rd5+ Kf6 52. Ke4 Nb8 53. b7 Kf7 54. Nd3 Bh4 55. Ne5+ Ke6 56. Nd7 1-0
