[Event "World U20-ch15"]
[Site "Groningen"]
[Date "1977.01.05"]
[Round "13"]
[White "Marrero, Miguel A"]
[Black "Karaosmanoglu, Sedat"]
[Result "1/2-1/2"]
[ECO "C05"]
[PlyCount "26"]
[EventDate "1976.12.21"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. f4 c5 6. c3 Nc6 7. Ndf3 Qa5 8. Kf2 Be7 9. Bd3 b5 10. Ne2 b4 11. g4 bxc3 12. bxc3 f6 13. Kg2 Ba6 1/2-1/2

[Event "World U20-ch15"]
[Site "Groningen"]
[Date "1977.01.03"]
[Round "12"]
[White "Yap, Andronico"]
[Black "Marrero, Miguel A"]
[Result "1-0"]
[ECO "B22"]
[PlyCount "59"]
[EventDate "1976.12.21"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. c3 Nf6 4. e5 Nd5 5. c4 Nc7 6. d4 d5 7. exd6 Bxd6 8. Nc3 cxd4 9. Qxd4 0-0 10. Bd3 Nc6 11. Qe3 e5 12. c5 Be7 13. 0-0 Bf6 14. Rd1 Qe7 15. Be4 Bg4 16. Bxh7+ Kxh7 17. Qe4+ Kg8 18. Qxg4 Rad8 19. Be3 Nd4 20. Rac1 Nce6 21. Bxd4 exd4 22. Ne4 Rd5 23. c6 bxc6 24. Rxc6 Rfd8 25. Rd3 g6 26. Rxe6 fxe6 27. Qxg6+ Bg7 28. Nfg5 Rf5 29. Rh3 d3 30. Rh8+ 1-0

[Event "World U20-ch15"]
[Site "Groningen"]
[Date "1977.01.02"]
[Round "11"]
[White "Marrero, Miguel A"]
[Black "Sequeira, Joao FA"]
[Result "1/2-1/2"]
[ECO "B74"]
[PlyCount "26"]
[EventDate "1976.12.21"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Nf3 d6 4. d4 cxd4 5. Nxd4 Nf6 6. Be2 g6 7. 0-0 Bg7 8. Nb3 0-0 9. Be3 Be6 10. f4 Qc8 11. h3 a5 12. a4 Nb4 13. Rf3 Rd8 1/2-1/2

[Event "World U20-ch15"]
[Site "Groningen"]
[Date "1977.01.01"]
[Round "10"]
[White "Salazar Jacob, Hernan"]
[Black "Marrero, Miguel A"]
[Result "1-0"]
[ECO "C10"]
[PlyCount "113"]
[EventDate "1976.12.21"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. Bd3 Be7 8. 0-0 0-0 9. Re1 c5 10. c3 cxd4 11. Nxd4 Bd7 12. Qf3 Bc6 13. Nxc6 bxc6 14. Bg5 Rb8 15. b3 Qb6 16. Re3 Rfd8 17. Qh3 g6 18. Qh4 Nd5 19. Rh3 Bxg5 20. Qxg5 Qc7 21. Bc4 Qf4 22. Qxf4 Nxf4 23. Rf3 Nd5 24. Rd1 Kf8 25. g3 Ke7 26. Re1 Nb6 27. Bd3 Rd6 28. Be4 Rbd8 29. Rfe3 c5 30. f4 Rd2 31. R3e2 Rxe2 32. Rxe2 Rd1+ 33. Kf2 Nd5 34. Bxd5 Rxd5 35. Ke3 h5 36. Rd2 Kd6 37. b4 Kc6 38. a4 a6 39. Rd3 Kb6 40. Ke4 f5+ 41. Ke3 Kc6 42. Kd2 Kb6 43. Kc2 Kc6 44. c4 Rxd3 45. b5+ Kb6 46. Kxd3 a5 47. Ke3 Kc7 48. Kf3 h4 49. Kg2 Kd6 50. Kh3 hxg3 51. hxg3 e5 52. fxe5+ Kxe5 53. b6 Kd6 54. Kh4 Kc6 55. Kg5 Kxb6 56. Kxg6 Kc6 57. Kxf5 1-0

[Event "World U20-ch15"]
[Site "Groningen"]
[Date "1976.12.31"]
[Round "9"]
[White "Marrero, Miguel A"]
[Black "Hebert, Jean"]
[Result "0-1"]
[ECO "B74"]
[BlackElo "2255"]
[PlyCount "62"]
[EventDate "1976.12.21"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 g6 7. 0-0 Bg7 8. Nb3 0-0 9. Be3 Be6 10. f4 Qc8 11. h3 a5 12. a4 Nb4 13. Bf3 Nd7 14. Nd4 Nc5 15. Nd5 Bxd5 16. exd5 e6 17. dxe6 Nxe6 18. Rf2 Nxd4 19. Bxd4 Bxd4 20. Qxd4 Nxc2 21. Rxc2 Qxc2 22. Qxd6 Qxb2 23. Rd1 Rad8 24. Qxd8 Rxd8 25. Rxd8+ Kg7 26. Rd7 b5 27. axb5 Qxb5 28. Rb7 Qc5+ 29. Kh2 a4 30. Bd1 Qd4 31. Bf3 a3 0-1

[Event "World U20-ch15"]
[Site "Groningen"]
[Date "1976.12.29"]
[Round "8"]
[White "Egmond, Peter"]
[Black "Marrero, Miguel A"]
[Result "0-1"]
[ECO "A94"]
[PlyCount "85"]
[EventDate "1976.12.21"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. Nf3 f5 2. g3 Nf6 3. Bg2 e6 4. 0-0 Be7 5. c4 0-0 6. d4 d5 7. b3 c6 8. Ba3 Nbd7 9. Qc1 Ne4 10. Nbd2 Bxa3 11. Qxa3 Qf6 12. Qb2 Kh8 13. Nxe4 fxe4 14. Ne5 Nxe5 15. dxe5 Qg5 16. f4 Qg4 17. Qd2 Bd7 18. Qe3 b6 19. b4 Rab8 20. cxd5 cxd5 21. h3 Qg6 22. Rac1 Rbc8 23. Kh2 Bb5 24. Rxc8 Rxc8 25. Rc1 Qe8 26. Rd1 Rc2 27. Rd2 Qc6 28. Rxc2 Qxc2 29. f5 exf5 30. Qg5 Qc8 31. e3 h6 32. Qg6 Be8 33. Qd6 Bf7 34. Qe7 Bh5 35. e6 Bf3 36. h4 Qc2 37. Qf8+ Kh7 38. Qxf5+ Kh8 39. Qh3 Qxg2+ 40. Qxg2 Bxg2 41. Kxg2 Kg8 42. Kh3 h5 43. g4 0-1

[Event "World U20-ch15"]
[Site "Groningen"]
[Date "1976.12.28"]
[Round "7"]
[White "Marrero, Miguel A"]
[Black "Duer, Arne"]
[Result "1/2-1/2"]
[ECO "B70"]
[PlyCount "56"]
[EventDate "1976.12.21"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Nde2 Nf6 7. g3 0-0 8. Bg2 d6 9. 0-0 Bd7 10. h3 a6 11. a4 Rb8 12. Nd5 Nxd5 13. exd5 Ne5 14. a5 Nc4 15. Nd4 Nxa5 16. Bg5 h6 17. Bxe7 Qxe7 18. Rxa5 Qd8 19. Ra2 Qc8 20. Kh2 Qc4 21. Nb3 Rfe8 22. Ra1 Bxb2 23. Rb1 Bg7 24. Nd2 Qc7 25. c4 b5 26. cxb5 Bxb5 27. Re1 Rxe1 28. Qxe1 a5 1/2-1/2

[Event "World U20-ch15"]
[Site "Groningen"]
[Date "1976.12.27"]
[Round "6"]
[White "Marrero, Miguel A"]
[Black "Messa, Roberto"]
[Result "1/2-1/2"]
[ECO "B06"]
[PlyCount "101"]
[EventDate "1976.12.21"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. c3 Nd7 5. Bd3 c5 6. 0-0 Qc7 7. Qe2 a6 8. a4 Ngf6 9. Re1 cxd4 10. cxd4 0-0 11. a5 b5 12. axb6 Qxb6 13. Na3 e5 14. Nc4 Qb8 15. Bd2 exd4 16. Nxd4 Ne5 17. Nxe5 dxe5 18. Nc6 Bg4 19. Qe3 Qb7 20. Nxe5 Qxb2 21. Nc4 Qb7 22. Reb1 Qc7 23. Ba5 Qa7 24. Bb6 Qd7 25. Bc5 Rfd8 26. Nb6 Qxd3 27. Qxd3 Rxd3 28. Nxa8 Nd7 29. Be3 Bxa1 30. Rxa1 Rd1+ 31. Rxd1 Bxd1 32. Nb6 Ne5 33. f4 Nd3 34. Bd2 Nc5 35. e5 Nb3 36. Be3 a5 37. Kf2 h5 38. Ke1 Bc2 39. Na4 Kf8 40. Nc5 Ke7 41. Nxb3 Bxb3 42. h4 Ke6 43. Bb6 a4 44. Kd2 Kf5 45. g3 Kg4 46. Bd8 Kxg3 47. Bg5 a3 48. Kc1 Ba2 49. Kc2 Kf3 50. Kc3 Bc4 51. Kc2 1/2-1/2

[Event "World U20-ch15"]
[Site "Groningen"]
[Date "1976.12.26"]
[Round "5"]
[White "Girault, Eric"]
[Black "Marrero, Miguel A"]
[Result "0-1"]
[ECO "A88"]
[PlyCount "102"]
[EventDate "1976.12.21"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. d4 f5 2. c4 Nf6 3. Nc3 g6 4. g3 Bg7 5. Bg2 0-0 6. Nf3 d6 7. 0-0 c6 8. Nd2 Qb6 9. e3 e5 10. dxe5 dxe5 11. Nf3 Qc7 12. Qc2 Be6 13. b3 Kh8 14. Ba3 Rd8 15. Rfd1 Na6 16. Rxd8+ Rxd8 17. Rd1 e4 18. Rxd8+ Qxd8 19. Nd4 Bf7 20. Nde2 Qa5 21. Qc1 Nd7 22. Bb2 Nb4 23. Na4 Nd3 24. Bxg7+ Kxg7 25. Qc3+ Qxc3 26. Naxc3 Kf6 27. f3 exf3 28. Bxf3 N7e5 29. Bg2 Ne1 30. Kf1 Nxg2 31. Kxg2 Nd3 32. Nf4 Nc5 33. Kf3 g5 34. Nfe2 Bh5+ 35. Kf2 Ke5 36. Ke1 Ne4 37. Nxe4 Kxe4 38. Kd2 Bxe2 39. Kxe2 g4 40. b4 b5 41. c5 a6 42. a3 h5 43. Kd2 Kf3 44. Kd3 Kg2 45. Kd4 Kxh2 46. Ke5 Kxg3 47. Kd6 h4 48. Kxc6 h3 49. Kd7 h2 50. c6 h1Q 51. c7 Qb7 0-1

[Event "World U20-ch15"]
[Site "Groningen"]
[Date "1976.12.24"]
[Round "4"]
[White "Marrero, Miguel A"]
[Black "Smith, Louis A"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "178"]
[EventDate "1976.12.21"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Bd7 6. Bc4 Be7 7. 0-0 Nc6 8. h3 Nxd4 9. Qxd4 0-0 10. Bg5 a6 11. a4 Be6 12. f4 b6 13. Qd3 Bxc4 14. Qxc4 h6 15. Bh4 Ne8 16. Bxe7 Qxe7 17. Nd5 Qe6 18. Qc6 Rc8 19. a5 Kh8 20. e5 Kh7 21. f5 Qxe5 22. axb6 Rb8 23. b7 Nf6 24. Nxf6+ Qxf6 25. Qxc7 Qd4+ 26. Kh1 Qb4 27. Rxa6 Rxb7 28. Qxd6 Qxd6 29. Rxd6 Rxb2 30. Rc1 Rc8 31. c4 Rc5 32. Rd5 Rxd5 33. cxd5 Rd2 34. Rc5 g6 35. fxg6+ Kxg6 36. Kh2 Rd3 37. Kg1 Rd2 38. Kh2 Rd3 39. Kg1 Kf5 40. Kf2 Ke5 41. Rc6 Rxd5 42. Rxh6 Rd3 43. Rh4 Kf6 44. Rf4+ Kg7 45. Rf3 Rd2+ 46. Kg3 Kg6 47. Ra3 Rc2 48. Kf3 Rd2 49. g3 Rh2 50. h4 Rc2 51. Ra4 Rc3+ 52. Kf4 Rc5 53. g4 Rb5 54. Ra6+ Kg7 55. Ra4 Rc5 56. h5 Rc1 57. g5 Rf1+ 58. Kg4 Rg1+ 59. Kf5 Rb1 60. h6+ Kh7 61. Ra5 Rf1+ 62. Ke5 Kg6 63. Ra8 Rf5+ 64. Ke4 Rxg5 65. Kf4 Rh5 66. Ra6+ f6 67. Ra1 Rxh6 68. Rg1+ Kf7 69. Kf5 Rh5+ 70. Kf4 Rb5 71. Rg2 Rb1 72. Rf2 Rg1 73. Kf5 Rg5+ 74. Kf4 Kg6 75. Ra2 Rg1 76. Ra6 Rf1+ 77. Kg4 Rb1 78. Kf4 Rb4+ 79. Kf3 Kg5 80. Ra1 Rb3+ 81. Kf2 f5 82. Rg1+ Kf4 83. Ra1 Rb2+ 84. Kf1 Kg4 85. Ra3 f4 86. Ra4 Kg3 87. Ra8 Rb1+ 88. Ke2 f3+ 89. Ke3 Re1+ 0-1

[Event "World U20-ch15"]
[Site "Groningen"]
[Date "1976.12.23"]
[Round "3"]
[White "Tonoli, Walter"]
[Black "Marrero, Miguel A"]
[Result "1/2-1/2"]
[ECO "B50"]
[PlyCount "106"]
[EventDate "1976.12.21"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. b3 d6 4. Bb2 e5 5. Bb5+ Nc6 6. 0-0 Nf6 7. c3 Be7 8. d4 Bd7 9. d5 Nb8 10. Bxd7+ Nbxd7 11. Nbd2 b5 12. Qe2 Rb8 13. c4 a6 14. Ne1 0-0 15. Nd3 Nb6 16. g3 bxc4 17. Nxc4 Nxc4 18. bxc4 Qd7 19. f4 Qg4 20. Qxg4 Nxg4 21. Rfe1 f6 22. Bc3 Rb7 23. Bd2 Rfb8 24. h3 Nh6 25. Kg2 Nf7 26. Rac1 Bd8 27. Kf3 h5 28. f5 Ng5+ 29. Kg2 Kf7 30. h4 Nh7 31. g4 hxg4 32. Kg3 g6 33. Kxg4 Be7 34. Rg1 Rg8 35. Kf3 gxf5 36. exf5 Rbb8 37. Rxg8 Kxg8 38. Bh6 Bf8 39. Bd2 Kf7 40. Rg1 Be7 41. Bc3 Nf8 42. Nf2 Nd7 43. Ne4 Rh8 44. Kg3 Rg8+ 45. Kf2 Rxg1 46. Kxg1 Nb6 47. Nd2 Bf8 48. Ba5 Na4 49. Bc7 Nb2 50. Kf2 Ke7 51. Ke2 Bh6 52. h5 Kd7 53. Ba5 Ke7 1/2-1/2

[Event "World U20-ch15"]
[Site "Groningen"]
[Date "1976.12.22"]
[Round "2"]
[White "Marrero, Miguel A"]
[Black "Dunne, David Joseph"]
[Result "1/2-1/2"]
[ECO "B07"]
[PlyCount "88"]
[EventDate "1976.12.21"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nd2 g6 4. Ngf3 Bg7 5. Bd3 0-0 6. 0-0 Nc6 7. c3 e5 8. dxe5 Nxe5 9. Bc2 Re8 10. Re1 Bd7 11. h3 Nxf3+ 12. Nxf3 Bc6 13. Bg5 h6 14. Bxf6 Qxf6 15. Nd4 Bd7 16. Qd2 Rad8 17. Bb3 Kh7 18. Re3 Rf8 19. Rf1 h5 20. f4 Bh6 21. Ref3 Rde8 22. Qd3 Re7 23. e5 dxe5 24. fxe5 Qxe5 25. Bxf7 Bf5 26. Nxf5 Rexf7 27. Nxh6 Rxf3 28. Rxf3 Rxf3 29. Qxf3 Kxh6 30. Qxb7 Qe1+ 31. Kh2 Qe5+ 32. Kh1 Qe1+ 33. Kh2 Qe5+ 34. g3 h4 35. Qf3 hxg3+ 36. Qxg3 Qe2+ 37. Qg2 Qe5+ 38. Kg1 Qe1+ 39. Qf1 Qe3+ 40. Kg2 Qg5+ 41. Kf2 Qf5+ 42. Kg2 Qg5+ 43. Kh2 Qe5+ 44. Kg2 Qg5+ 1/2-1/2

[Event "World U20-ch15"]
[Site "Groningen"]
[Date "1976.12.21"]
[Round "1"]
[White "Vladimirov, Yevgeniy"]
[Black "Marrero, Miguel A"]
[Result "1-0"]
[ECO "A38"]
[PlyCount "35"]
[EventDate "1976.12.21"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. Nf3 g6 4. g3 Bg7 5. Bg2 0-0 6. 0-0 cxd4 7. Nxd4 Nc6 8. Nc3 a6 9. Nc2 d6 10. b3 Be6 11. Bb2 Rc8 12. Rc1 Nd7 13. Qd2 b5 14. cxb5 axb5 15. Bxc6 Rxc6 16. Nb4 Rb6 17. Ncd5 Bxb2 18. Rc8 1-0

