[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Acosta, Alejandro"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "2325"]
[PlyCount "52"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Qxd4 e6 6. Bc4 Nc6 7. Qe4 Nb6 8. Bb3 d6 9. exd6 Bxd6 10. Nf3 Nd7 11. Bg5 Qb6 12. Nbd2 Nc5 13. Qe2 Be7 14. Bxe7 Nxe7 15. Nc4 Qc7 16. Bc2 Nd5 17. Qe5 Qxe5+ 18. Nfxe5 0-0 19. 0-0-0 b6 20. Nd6 f6 21. Nd3 Rd8 22. Nxc5 Rxd6 23. Ne4 Rd7 24. Rhe1 Ba6 25. Bb3 Rad8 26. g3 Kf7 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "10"]
[White "De Greif, Boris"]
[Black "Agudelo, Antonio"]
[Result "1/2-1/2"]
[ECO "B19"]
[WhiteElo "2325"]
[BlackElo "2345"]
[PlyCount "29"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nd7 7. h4 h6 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 Qc7 11. Bd2 e6 12. 0-0-0 Ngf6 13. Ne4 0-0-0 14. g4 Nxe4 15. Qxe4 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Alzate, Dario"]
[Result "1-0"]
[ECO "A81"]
[WhiteElo "2325"]
[PlyCount "82"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 e6 2. Nf3 f5 3. g3 Nf6 4. Bg2 Bb4+ 5. c3 Bd6 6. Nbd2 Nc6 7. Qc2 0-0 8. e4 fxe4 9. Nxe4 b6 10. Nfg5 Qe7 11. Be3 Rb8 12. Rd1 Ba6 13. b3 g6 14. Nxf6+ Rxf6 15. Ne4 Rf5 16. g4 Rf7 17. g5 Qf8 18. h4 Ne7 19. h5 Bb7 20. hxg6 Nxg6 21. d5 exd5 22. Nf6+ Rxf6 23. gxf6 Qxf6 24. Bxd5+ Bxd5 25. Rxd5 Be5 26. Rxd7 Bxc3+ 27. Kf1 Nf8 28. Rxc7 Be5 29. Rxa7 Rd8 30. Rg1+ Ng6 31. Bg5 Qf3 32. Bxd8 Qh3+ 33. Ke2 Qh5+ 34. Ke1 b5 35. Bg5 Qh3 36. Be3 Qe6 37. Rc7 Bxc7 38. Qxc7 Qe4 39. Qb8+ Kf7 40. Qc7+ Ke8 41. Qb8+ Kf7 1-0

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Betancourt Giraldo, David Rogelio"]
[Result "1-0"]
[ECO "D94"]
[WhiteElo "2325"]
[BlackElo "2350"]
[PlyCount "61"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. e3 0-0 6. cxd5 Nxd5 7. Bc4 Nb6 8. Bb3 Na6 9. 0-0 c5 10. Qe2 e6 11. Rd1 Qe7 12. e4 cxd4 13. Nxd4 e5 14. Ndb5 Nc7 15. Nxc7 Qxc7 16. Bg5 Bd7 17. Rac1 Qb8 18. a4 h6 19. Be7 Re8 20. Bd6 Qd8 21. a5 Nc8 22. Ba3 Qg5 23. Bxf7+ Kxf7 24. Rxd7+ Kg8 25. Rcd1 Ne7 26. Rxb7 Kh8 27. Rdd7 Bf8 28. g3 Rac8 29. Kg2 Qf6 30. Bxe7 Rxe7 31. Rxe7 1-0

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "12"]
[White "De Greif, Boris"]
[Black "Cuellar Gacharna, Miguel"]
[Result "1/2-1/2"]
[ECO "B42"]
[WhiteElo "2325"]
[BlackElo "2385"]
[PlyCount "64"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 g6 6. 0-0 Bg7 7. Be3 Nc6 8. Nxc6 bxc6 9. c3 Ne7 10. Nd2 0-0 11. Qe2 d5 12. Bc5 Re8 13. e5 Nf5 14. Nf3 Bb7 15. Rfe1 a5 16. a4 Bf8 17. Bxf8 Kxf8 18. Bxf5 exf5 19. Qe3 Kg7 20. b4 Qe7 21. Qc5 axb4 22. Qxe7 Rxe7 23. cxb4 Rae8 24. Reb1 f6 25. exf6+ Kxf6 26. Rd1 Re2 27. Nd4 Rb2 28. b5 cxb5 29. axb5 Rb4 30. f3 Rc8 31. Nc6 Rxb5 32. Na7 Rbc5 1/2-1/2

[Event "Match/Nation CUB-America"]
[Site "telex"]
[Date "1979.??.??"]
[Round "1.4"]
[White "De Greif, Boris"]
[Black "Fernandez Gonzalez, Juan Carlos"]
[Result "0-1"]
[ECO "A30"]
[WhiteElo "2325"]
[BlackElo "2385"]
[PlyCount "67"]
[EventDate "1979.??.??"]
[EventType "team"]
[EventRounds "1"]
[EventCountry "CUB"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]
[WhiteTeam "United States"]
[BlackTeam "Cuba"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "CUB"]

1. Nf3 c5 2. g3 b6 3. Bg2 Bb7 4. c4 Nf6 5. 0-0 e6 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 0-0 9. b3 a6 10. Bb2 d6 11. Rfd1 Nbd7 12. Ne1 Qc7 13. Rac1 Bxg2 14. Nxg2 Qb7 15. Ne3 b5 16. Nb1 Rfc8 17. Nd2 Ne5 18. Qf4 Nfd7 19. Qe4 Qb8 20. Qb1 f5 21. cxb5 Rxc1 22. Rxc1 axb5 23. Nc2 b4 24. Nd4 Nc5 25. f4 Ng4 26. Nc6 Qb7 27. Nxe7+ Qxe7 28. Bd4 Nf6 29. Qc2 Nd5 30. e4 Nc3 31. Bxc3 bxc3 32. Qxc3 fxe4 33. a4 Nd3 34. Rf1 0-1

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Gomez, Frank"]
[Result "1/2-1/2"]
[ECO "E71"]
[WhiteElo "2325"]
[PlyCount "83"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. h3 c5 6. dxc5 Qa5 7. Bd3 Qxc5 8. Be3 Qa5 9. Nf3 Nc6 10. Qd2 0-0 11. Rc1 Be6 12. b3 Rfc8 13. Nd5 Qxd2+ 14. Bxd2 Nd7 15. 0-0 Bxd5 16. exd5 Nd4 17. Nxd4 Bxd4 18. Rfe1 Re8 19. Kf1 f6 20. f4 Kf7 21. Re2 a6 22. b4 Rac8 23. Re4 Ba7 24. Bc2 f5 25. Ree1 Nf6 26. Bd3 Bd4 27. a4 h5 28. a5 Rc7 29. Re6 Rec8 30. Rce1 h4 31. Ke2 Nh5 32. Kf3 Ng7 33. R6e2 Nh5 34. Rc1 Nf6 35. Rce1 Nh5 36. Rc1 Nf6 37. Be1 Rh8 38. Bf2 Bxf2 39. Kxf2 Rhc8 40. Rce1 Ng8 41. Rc2 Nf6 42. Rce2 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Gonzalez, Gonzalo"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "2325"]
[PlyCount "171"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Bc4 Nf6 5. Bg5 0-0 6. Qe2 Nc6 7. 0-0-0 e5 8. dxe5 Nxe5 9. Bb3 h6 10. Bh4 g5 11. Bg3 Qe7 12. Nf3 Bd7 13. Nxe5 dxe5 14. h4 g4 15. h5 a5 16. a3 c6 17. Bh4 b5 18. Rd3 b4 19. Nb1 a4 20. Bc4 bxa3 21. Nxa3 Rfb8 22. Rhd1 Be6 23. Bxe6 Qxe6 24. Nc4 Rb4 25. Rc3 Ne8 26. Bd8 Rab8 27. Ba5 R4b5 28. Rg3 Rc5 29. b3 axb3 30. cxb3 Qe7 31. Kc2 Nf6 32. Bc3 Nxh5 33. Rxg4 Qb7 34. Rb1 Nf4 35. Rxf4 exf4 36. Qg4 Rg5 37. Qxf4 Bxc3 38. Kxc3 Qb4+ 39. Kc2 Rxg2 40. Qf3 Rg5 41. e5 Qc5 42. Rd1 Qa7 43. Kb2 Ra8 44. Kc3 Rg6 45. Qf5 Qe7 46. Rd7 Qe6 47. Qxe6 fxe6 48. Nd2 Rf8 49. Ne4 Rf3+ 50. Kc4 Rg4 51. Rd4 Kg7 52. Kc5 Kg6 53. Rc4 Rxb3 54. Kxc6 h5 55. Kd7 Kf5 56. Nd6+ Kxe5 57. Rc5+ Kf6 58. Rxh5 Rg7+ 59. Kc6 Rc3+ 60. Kb5 Ke7 61. Ne4 Rc2 62. Rh4 Rg1 63. Rh7+ Kf8 64. Nc5 Rb1+ 65. Kc6 Rbc1 66. Rh5 Kf7 67. f4 Rc4 68. Kb5 Rxf4 69. Rh7+ Kg6 70. Re7 Rxc5+ 71. Kxc5 Kf6 72. Re8 Ke5 73. Rh8 Ke4 74. Kd6 e5 75. Rh1 Rf6+ 76. Kc5 Rf2 77. Kd6 Rf6+ 78. Kc5 Rf2 79. Kd6 Re2 80. Rf1 Kd3 81. Rd1+ Kc2 82. Rd5 e4 83. Ke5 Kc3 84. Rd8 Re1 85. Rd7 e3 86. Ke4 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "14"]
[White "De Greif, Boris"]
[Black "Sanchez, Luis Augusto"]
[Result "1/2-1/2"]
[ECO "C28"]
[WhiteElo "2325"]
[BlackElo "2240"]
[PlyCount "23"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6 4. d3 Bb4 5. Nge2 d6 6. 0-0 h6 7. a3 Ba5 8. b4 Bb6 9. Na4 0-0 10. Nxb6 axb6 11. Bb2 Be6 12. Ng3 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "2"]
[White "Garcia, Luis E"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A36"]
[WhiteElo "2375"]
[BlackElo "2325"]
[PlyCount "83"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 c5 5. e4 d6 6. Nge2 Nc6 7. 0-0 0-0 8. h3 Ne8 9. f4 Nc7 10. d3 Ne6 11. f5 Ned4 12. g4 Rb8 13. Bg5 b5 14. Rb1 bxc4 15. dxc4 h6 16. Be3 Nxe2+ 17. Qxe2 g5 18. h4 Bxc3 19. bxc3 Rxb1 20. Rxb1 f6 21. hxg5 hxg5 22. Qd2 Rf7 23. Bxc5 Qc7 24. Bd4 Rh7 25. Bf1 Rh4 26. Qg2 Ne5 27. Be2 Bb7 28. c5 dxc5 29. Bxe5 fxe5 30. Qg3 Bxe4 31. Bc4+ Kh7 32. Re1 Qc6 33. Kf2 Bxf5 34. Qxe5 e6 35. gxf5 Rxc4 36. Qxe6 Rf4+ 37. Ke3 Qxe6+ 38. fxe6 Kg7 39. e7 Kf7 40. Rg1 Kxe7 41. Rxg5 Ra4 42. Rxc5 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "15"]
[White "Gonzalez Rodriguez, Jorge Armando"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E61"]
[BlackElo "2325"]
[PlyCount "31"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 c5 5. e3 0-0 6. Nge2 Nc6 7. 0-0 d6 8. d4 Bd7 9. b3 Rb8 10. Bb2 b6 11. Qd2 Qc8 12. Rfe1 a6 13. Rac1 Re8 14. e4 Nxd4 15. Nxd4 cxd4 16. Qxd4 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "8"]
[White "Gutierrez, Ramon"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B01"]
[BlackElo "2325"]
[PlyCount "57"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. Nf3 Nxd5 4. d4 Bg4 5. Be2 e6 6. h3 Bh5 7. Ne5 Bxe2 8. Qxe2 Nd7 9. 0-0 Be7 10. c4 N5f6 11. Nc3 0-0 12. Bg5 Nxe5 13. dxe5 Nd7 14. Bf4 Nc5 15. Rad1 Qe8 16. Qg4 f5 17. exf6 Rxf6 18. Bxc7 Qc6 19. Bg3 Rg6 20. Qe2 a5 21. Rfe1 Rf8 22. Nd5 Bg5 23. h4 exd5 24. cxd5 Qf6 25. hxg5 Qxg5 26. Qe7 Qxe7 27. Rxe7 Rd8 28. d6 Re6 29. Rd5 1-0

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "4"]
[White "Gutierrez Herrera, Jose Antonio"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C60"]
[BlackElo "2325"]
[PlyCount "115"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 4. d4 Nxd4 5. Nxd4 exd4 6. Qxd4 Qf6 7. Be3 Bg7 8. c3 Qxd4 9. cxd4 Ne7 10. Nc3 0-0 11. 0-0 c6 12. Bc4 d6 13. Rac1 b5 14. Bb3 a6 15. Rfd1 Bb7 16. Bg5 Rae8 17. a3 Nc8 18. f3 Kh8 19. f4 f5 20. e5 d5 21. Na2 Nb6 22. Nb4 Nc4 23. Nd3 Bc8 24. a4 Rf7 25. Ra1 Ra7 26. a5 Bf8 27. Kf2 Be6 28. Bc2 b4 29. Ba4 Rc8 30. Rdc1 Rac7 31. Ke2 Kg8 32. Bh4 Kf7 33. Be1 Rb7 34. b3 Nxa5 35. Nc5 Rb6 36. Nd3 Ke8 37. Rc2 Kd7 38. Rac1 Nb7 39. Bh4 a5 40. h3 Ra6 41. Kf3 h5 42. Bf6 Bf7 43. Ne1 Be8 44. g4 Ke6 45. gxh5 gxh5 46. Ke3 Nd6 47. Nf3 Ne4 48. Ng5+ Nxg5 49. fxg5 Kd7 50. Kf4 Ke6 51. Bb5 Rb6 52. Bd3 Bg6 53. Ra2 Ra8 54. Rca1 c5 55. dxc5 Bxc5 56. Rxa5 Rxa5 57. Rxa5 Bg1 58. Ra7 1-0

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "11"]
[White "Henao, Raul Fernando"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C61"]
[WhiteElo "2320"]
[BlackElo "2325"]
[PlyCount "59"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 exd4 5. 0-0 c6 6. Bc4 Nf6 7. Re1 d6 8. c3 Ng4 9. Be2 h5 10. d3 Qh4 11. Bxg4 hxg4 12. Bf4 dxc3 13. bxc3 Be7 14. d4 Bd7 15. Nd2 Bg5 16. Bg3 Qh6 17. Nf1 Bf4 18. e5 0-0-0 19. Qa4 Bxg3 20. fxg3 Kb8 21. Rab1 Bf5 22. Rb2 Ka8 23. Re3 dxe5 24. Rxe5 Qc1 25. Qb4 Bc8 26. Re7 Rxh2 27. Rb1 Qxb1 28. Qxb1 Rh6 29. Rxf7 Rdh8 30. Qb4 1-0

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "6"]
[White "Herrera, Gabriel"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C69"]
[BlackElo "2325"]
[PlyCount "42"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 f6 6. d4 Bg4 7. dxe5 Qxd1 8. Rxd1 fxe5 9. Rd3 Bd6 10. Nbd2 Ne7 11. Nc4 Ng6 12. h3 Bxf3 13. Rxf3 Rf8 14. Nxd6+ cxd6 15. Rd3 Kd7 16. Be3 Nf4 17. Rd2 Kc7 18. Rad1 Rad8 19. Bxf4 Rxf4 20. f3 Rf6 21. c4 c5 1/2-1/2

[Event "COL-ch28"]
[Site "Manizales"]
[Date "1979.??.??"]
[Round "13"]
[White "Zapata, Alonso"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C70"]
[WhiteElo "2375"]
[BlackElo "2325"]
[PlyCount "119"]
[EventDate "1979.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Na5 6. 0-0 d6 7. c3 Nxb3 8. axb3 Bb7 9. d3 Nf6 10. Na3 Be7 11. Nc2 0-0 12. Bg5 Nh5 13. Bxe7 Qxe7 14. Ne3 g6 15. Ne1 Qg5 16. Nf3 Qe7 17. b4 Kh8 18. g3 f5 19. exf5 Ng7 20. Nh4 gxf5 21. Neg2 f4 22. d4 e4 23. d5 Qg5 24. Qd2 Nh5 25. Qd4+ Qe5 26. Rad1 Rae8 27. b3 Bc8 28. c4 Bh3 29. Rfe1 e3 30. fxe3 f3 31. Nf4 Nxf4 32. gxf4 Qxd4 33. Rxd4 Bg4 34. Kf2 bxc4 35. bxc4 Rb8 36. Rb1 Bf5 37. Nxf5 Rxf5 38. Kxf3 Rg8 39. Rd2 Rh5 40. Re2 Rh3+ 41. Ke4 Re8+ 42. Kd4 Rf3 43. Kd3 h5 44. Ra1 Ra8 45. Rg1 Rb8 46. Rg3 Rxg3 47. hxg3 Kh7 48. Ra2 Kg6 49. Rxa6 Kf5 50. Ra7 Kg4 51. Rxc7 Kxg3 52. Rg7+ Kf3 53. Rh7 Re8 54. Rxh5 Rxe3+ 55. Kc2 Ke4 56. f5 Rf3 57. Rh4+ Kxf5 58. Rd4 Re3 59. Rd3 Re8 60. Kc3 1-0

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.11.10"]
[Round "14"]
[White "Braga, Cicero Nogueira"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C55"]
[BlackElo "2335"]
[PlyCount "109"]
[EventDate "1978.10.25"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Brazil"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "BRA"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. d4 d6 5. dxe5 dxe5 6. Qxd8+ Bxd8 7. Nc3 Nf6 8. Be3 Bg4 9. 0-0-0 0-0 10. Rd2 Re8 11. Ng5 Bh5 12. f3 h6 13. Nh3 Na5 14. Be2 Nh7 15. Rhd1 Nf8 16. Rd5 Nc6 17. Bb5 a6 18. Bxc6 bxc6 19. Rc5 Re6 20. Nf2 f6 21. Nd3 Be8 22. Ra5 Be7 23. Na4 Nd7 24. Nac5 Bxc5 25. Bxc5 Nb8 26. Ba3 Bf7 27. b3 g5 28. Kd2 Re8 29. Ke3 Be6 30. Nc5 Bc8 31. Bb2 Kf7 32. g3 Rg8 33. Rd2 h5 34. Nd3 h4 35. f4 exf4+ 36. gxf4 g4 37. f5 g3 38. Rg2 h3 39. Rxg3 Rxg3+ 40. hxg3 Nd7 41. Kf2 Bb7 42. Kg1 Re8 43. e5 fxe5 44. Nxe5+ Nxe5 45. Rxe5 Rxe5 46. Bxe5 c5 47. Kh2 Be4 48. g4 Bxc2 49. Kxh3 Ke8 50. Kg3 Kd7 51. Kf4 Bb1 52. a3 Kc6 53. g5 a5 54. Bc3 Kd5 55. g6 1-0

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.11.08"]
[Round "13"]
[White "Aldrete, Jorge"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "D03"]
[WhiteElo "2310"]
[BlackElo "2335"]
[PlyCount "83"]
[EventDate "1978.10.25"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Mexico"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "MEX"]
[BlackTeamCountry "COL"]

1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 d5 5. e3 0-0 6. Bd3 c5 7. c3 Nc6 8. 0-0 Qb6 9. Rb1 Re8 10. b4 cxb4 11. cxb4 Bg4 12. Qb3 Bxf3 13. Nxf3 e6 14. Rfc1 Rec8 15. a3 Ne8 16. Bf4 Bf8 17. Qa2 a6 18. Rc2 f6 19. h4 Na7 20. Rbc1 Rxc2 21. Rxc2 Rc8 22. Rxc8 Nxc8 23. Qc2 Ne7 24. h5 Kf7 25. hxg6+ hxg6 26. g4 Qc6 27. g5 Qxc2 28. Bxc2 Bg7 29. gxf6 Bxf6 30. Ng5+ Bxg5 31. Bxg5 Nc6 32. Bf4 Nf6 33. Kf1 b5 34. Bc7 Ne4 35. Ke2 Nc3+ 36. Kd3 Na4 37. Kd2 g5 38. Kc1 Kf6 39. Bd1 Kg6 40. Kc2 Kf6 41. Bh5 Ke7 42. Be2 1/2-1/2

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.11.02"]
[Round "8"]
[White "Hoen, Ragnar Harald"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C51"]
[WhiteElo "2380"]
[BlackElo "2335"]
[PlyCount "54"]
[EventDate "1978.10.25"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Norway"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "NOR"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7 6. d4 Na5 7. Nxe5 Nxc4 8. Nxc4 d5 9. exd5 Qxd5 10. Ne3 Qd8 11. 0-0 Nf6 12. Qf3 c6 13. Nf5 Bxf5 14. Qxf5 Qd5 15. Qd3 0-0 16. Nd2 Rad8 17. Nf3 Rfe8 18. Re1 Nd7 19. c4 Qa5 20. Bd2 Qa6 21. Qb3 Bf6 22. Rab1 b6 23. a4 Rxe1+ 24. Rxe1 Nf8 25. Be3 h6 26. Rd1 Ng6 27. h3 Qa5 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.29"]
[Round "15"]
[White "Gutierrez Herrera, Jose Antonio"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C71"]
[BlackElo "2340"]
[PlyCount "28"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c4 Bg4 6. Bxc6+ bxc6 7. h3 Bxf3 8. Qxf3 Nf6 9. 0-0 Be7 10. Nc3 0-0 11. d3 Rb8 12. b3 Nd7 13. Be3 Bg5 14. d4 Bxe3 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.28"]
[Round "14"]
[White "De Greif, Boris"]
[Black "Gomez, Frank"]
[Result "1-0"]
[ECO "E67"]
[WhiteElo "2340"]
[PlyCount "91"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 d6 3. g3 g6 4. Bg2 Bg7 5. 0-0 0-0 6. c4 c6 7. Nc3 Nbd7 8. d5 cxd5 9. cxd5 Nc5 10. Nd4 a5 11. h3 Bd7 12. Be3 Qb8 13. a4 Qc8 14. Kh2 h5 15. Bg5 Kh7 16. e4 Ng8 17. Ra3 Qe8 18. Re1 Rc8 19. Bf1 Na6 20. Ncb5 Nb4 21. Rc3 Bxb5 22. Bxb5 Qd8 23. Be3 Nf6 24. Qb1 Nd7 25. Rxc8 Qxc8 26. Rc1 Qd8 27. f4 Nc5 28. Rd1 Qc7 29. g4 hxg4 30. hxg4 Rh8 31. Kg3 Kg8 32. b3 Bf6 33. Nf3 Qc8 34. Rc1 b6 35. Bc4 Kf8 36. e5 dxe5 37. fxe5 Qb8 38. Bd4 Bg7 39. Re1 Nd7 40. Qe4 Nf6 41. Qe2 Nbxd5 42. Ng5 Bh6 43. Rh1 Kg7 44. Rxh6 Rxh6 45. Qf3 e6 46. Bxd5 1-0

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.26"]
[Round "13"]
[White "Alzate, Javier"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E63"]
[WhiteElo "2300"]
[BlackElo "2340"]
[PlyCount "81"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. 0-0 0-0 5. c4 d6 6. d4 Nc6 7. Nc3 a6 8. h3 Rb8 9. Bg5 b5 10. cxb5 axb5 11. d5 Na5 12. Nd4 Bd7 13. Rc1 h6 14. Bxf6 Bxf6 15. Qd3 Nc4 16. b3 Na3 17. h4 b4 18. Ne4 Bg7 19. Nc6 Bxc6 20. Rxc6 Nb5 21. h5 f5 22. Nd2 g5 23. Rc4 Na3 24. Rc6 Nb5 25. g4 fxg4 26. Rc4 Nc3 27. Rxg4 Qe8 28. f4 Qxh5 29. Bf3 Qh3 30. fxg5 h5 31. Rg2 Rf4 32. Rh2 Qg3+ 33. Kh1 Rh4 34. Rxh4 Qxh4+ 35. Kg2 Qxg5+ 36. Kf2 Rf8 37. Rh1 h4 38. Ne4 Qxd5 39. Rxh4 Qxd3 40. exd3 Nxe4+ 41. Rxe4 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.24"]
[Round "12"]
[White "De Greif, Boris"]
[Black "Rodriguez, Mauricio"]
[Result "1-0"]
[ECO "A08"]
[WhiteElo "2340"]
[PlyCount "67"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 g6 2. g3 Bg7 3. Bg2 c5 4. 0-0 Nc6 5. c3 e5 6. e4 Nge7 7. d3 0-0 8. Nbd2 d5 9. exd5 Nxd5 10. Re1 Nc7 11. Nc4 Re8 12. Ng5 f6 13. Ne4 Bf8 14. f4 Be7 15. fxe5 fxe5 16. a4 Nd5 17. Bh6 Be6 18. Qe2 b6 19. Rf1 a6 20. h4 Qc7 21. Rf2 b5 22. axb5 axb5 23. Rxa8 Rxa8 24. Ne3 Ra1+ 25. Kh2 Nxe3 26. Qxe3 Nd8 27. Nf6+ Bxf6 28. Rxf6 Bf7 29. Bd5 Qe7 30. Qf3 c4 31. dxc4 bxc4 32. Bxc4 e4 33. Qf4 Qb7 34. Rxf7 1-0

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.23"]
[Round "11"]
[White "Gonzalez, Sergio"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B25"]
[BlackElo "2340"]
[PlyCount "61"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. f4 g6 2. Nf3 Bg7 3. e4 c5 4. Nc3 d6 5. g3 Nc6 6. Bg2 f5 7. d3 Nf6 8. 0-0 0-0 9. Kh1 e6 10. Be3 Qa5 11. Nd2 Ng4 12. Bg1 Nd4 13. h3 Nh6 14. Nc4 Qa6 15. a4 Bd7 16. Nb5 Bxb5 17. axb5 Qxb5 18. c3 Nc6 19. Nxd6 Qxb2 20. Bxc5 Rfb8 21. Ra3 b6 22. Rf2 bxc5 23. Rxb2 Rxb2 24. Rb3 Rb8 25. Rxb2 Rxb2 26. exf5 Rxg2 27. Kxg2 Nxf5 28. Nxf5 gxf5 29. Qa4 Ne7 30. Qxa7 Nd5 31. Qd7 1-0

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.22"]
[Round "10"]
[White "De Greif, Boris"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "1/2-1/2"]
[ECO "C77"]
[WhiteElo "2340"]
[BlackElo "2410"]
[PlyCount "82"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 Nc6 2. Nf3 e5 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Bc5 7. c3 d6 8. 0-0 Be6 9. d3 0-0 10. Be3 Qe7 11. Nbd2 Ng4 12. h3 Nxe3 13. fxe3 Rad8 14. d4 Bxb3 15. axb3 Bb6 16. Rxa6 d5 17. Qxb5 Nb8 18. Raa1 exd4 19. cxd4 dxe4 20. Ne5 Qg5 21. Qe2 f5 22. Rae1 g6 23. Ndc4 Nd7 24. Nxd7 Rxd7 25. Qf2 Qf6 26. Qg3 c5 27. Nxb6 Qxb6 28. dxc5 Qxc5 29. Rc1 Qb5 30. Rc3 Rfd8 31. Re1 Kg7 32. Kh2 h6 33. h4 Qb8 34. Qxb8 Rxb8 35. Ra1 g5 36. Ra6 f4 37. Re6 Rb5 38. hxg5 hxg5 39. Rc4 Rxb3 40. Rcxe4 fxe3 41. Rxe3 Rxb2 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.21"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Herrera, Gabriel"]
[Result "1/2-1/2"]
[ECO "A07"]
[WhiteElo "2340"]
[PlyCount "92"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 c6 3. d3 Bg4 4. Nbd2 Nd7 5. Bg2 e6 6. 0-0 Bd6 7. e4 Ne7 8. Qe1 Rc8 9. Qe3 h6 10. b3 0-0 11. Bb2 c5 12. h3 d4 13. Qe1 Bxf3 14. Bxf3 e5 15. Nc4 Bb8 16. a4 Nf6 17. Ba3 b6 18. b4 Re8 19. bxc5 bxc5 20. Qd2 Rc6 21. Rfb1 Qc8 22. Kg2 Ra6 23. a5 Qc6 24. Rb3 Rc8 25. Rab1 Bd6 26. Rb5 Kh7 27. Bg4 Rc7 28. Qe2 Nxg4 29. hxg4 f6 30. Qf3 Kg6 31. Bc1 Qd7 32. Bd2 Rac6 33. Rh1 Rb7 34. Rxb7 Qxb7 35. g5 fxg5 36. Qh5+ Kf6 37. f4 exf4 38. gxf4 Bxf4 39. Bxf4 gxf4 40. Rf1 Ng6 41. Ne5 Nxe5 42. Qf5+ Ke7 43. Qxe5+ Kf7 44. Rxf4+ Rf6 45. Rxf6+ gxf6 46. Qxc5 Qd7 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.20"]
[Round "8"]
[White "Henao, Raul Fernando"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C60"]
[WhiteElo "2290"]
[BlackElo "2340"]
[PlyCount "65"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. 0-0 g6 5. c3 Bg7 6. d4 exd4 7. cxd4 d5 8. exd5 Nxd5 9. Bg5 Qd6 10. Re1+ Be6 11. Nbd2 0-0 12. Ne4 Qb4 13. Bxc6 bxc6 14. Qc1 Rab8 15. b3 Rb6 16. Bh6 Qe7 17. Bxg7 Kxg7 18. Nc5 Qf6 19. Ne5 Nf4 20. Re4 g5 21. Nxe6+ Qxe6 22. f3 f6 23. Rxf4 gxf4 24. Nc4 Rb5 25. Qxf4 Re8 26. Qxc7+ Re7 27. Qf4 Rd5 28. Rc1 h5 29. h4 Kh7 30. Nd2 Qd6 31. Qxd6 Rxd6 32. Ne4 Rde6 33. Rc5 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.19"]
[Round "7"]
[White "Agudelo, Antonio"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A36"]
[WhiteElo "2300"]
[BlackElo "2340"]
[PlyCount "82"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 Nf6 6. Bd2 0-0 7. h4 d6 8. Qc1 Nd4 9. Kf1 Rb8 10. Nf3 a6 11. Nxd4 cxd4 12. Nd5 b5 13. Nxf6+ Bxf6 14. h5 bxc4 15. hxg6 fxg6 16. Qxc4+ e6 17. b4 Be5 18. Kg1 Rf7 19. Rc1 d5 20. Qb3 Bd7 21. Qd1 Bd6 22. a3 Qf6 23. Qe1 Rbf8 24. Bh6 Rc8 25. Rxc8+ Bxc8 26. Bf3 Bb7 27. Bg4 e5 28. f3 Rc7 29. Qd2 e4 30. f4 Be7 31. Bg5 Qd6 32. Bxe7 Rxe7 33. Kg2 h5 34. Bh3 h4 35. Rf1 hxg3 36. f5 e3 37. Qe1 Bc8 38. Qxg3 Qxg3+ 39. Kxg3 Rc7 40. fxg6 Bxh3 41. Kxh3 Rc2 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.17"]
[Round "6"]
[White "Cuartas, Carlos Enrique"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A03"]
[WhiteElo "2440"]
[BlackElo "2340"]
[PlyCount "91"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. f4 Nf6 2. Nf3 g6 3. d3 d5 4. g3 Bg7 5. Bg2 0-0 6. 0-0 c6 7. c3 Nbd7 8. Qc2 a5 9. e4 dxe4 10. dxe4 Nc5 11. Ne5 Ng4 12. Nxg4 Bxg4 13. h3 Be6 14. Rd1 Qc8 15. Be3 b6 16. Kh2 a4 17. Na3 f5 18. Bxc5 bxc5 19. exf5 Bxf5 20. Qe2 Qa6 21. Qe3 e5 22. fxe5 Rae8 23. Bf1 Qb7 24. Nc4 Be6 25. b3 axb3 26. Nd6 Qb8 27. Nxe8 Rxe8 28. axb3 Qxe5 29. Qxe5 Bxe5 30. Bc4 Bxc4 31. bxc4 Bxc3 32. Ra7 Bd4 33. Rb1 h5 34. h4 Be5 35. Kh3 Bd6 36. Rbb7 Re6 37. Ra8+ Bf8 38. Rc8 Rf6 39. Rbc7 Rf2 40. Rxc6 Kg7 41. R8c7+ Kh6 42. Re6 Ra2 43. Rcc6 Ra4 44. Rxg6+ Kh7 45. Rgf6 Bg7 46. Rf4 1-0

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.16"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Garcia, Gildardo"]
[Result "1-0"]
[ECO "A23"]
[WhiteElo "2340"]
[BlackElo "2340"]
[PlyCount "99"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. g3 c6 4. Nf3 e4 5. Nd4 Qb6 6. Nc2 d5 7. Bg2 Be6 8. 0-0 Nbd7 9. cxd5 cxd5 10. d3 Rd8 11. Be3 Qa6 12. Nd4 exd3 13. exd3 Bc5 14. Qa4 Qb6 15. Nxe6 fxe6 16. Bxc5 Qxc5 17. Rae1 Kf7 18. d4 Qc6 19. Qb3 Rhe8 20. Re2 Nb6 21. Rfe1 Nc4 22. Bh3 Rd6 23. Nb5 Ne4 24. Rxe4 dxe4 25. Qxc4 Rd7 26. Qxc6 bxc6 27. Nc3 Rxd4 28. Nxe4 e5 29. Bg2 a5 30. h4 h6 31. Rc1 Rb8 32. b3 a4 33. Rxc6 axb3 34. axb3 Rxb3 35. Nd6+ Kg8 36. h5 Rb8 37. Nf5 Rd1+ 38. Bf1 Rbb1 39. Ne3 Rdc1 40. Rd6 Rc5 41. Kg2 Kf7 42. Rg6 Rb7 43. Bc4+ Kf8 44. Ra6 Rb4 45. Ra8+ Ke7 46. Nd5+ Ke6 47. Nxb4+ Rxc4 48. Nd3 Rc3 49. Nb2 Rc1 50. Rd8 1-0

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.15"]
[Round "4"]
[White "Silva Morales, Marco Antonio"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C60"]
[BlackElo "2340"]
[PlyCount "60"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. Nc3 Ng6 5. d4 exd4 6. Nxd4 Bc5 7. Nf5 0-0 8. Qh5 d5 9. 0-0 Bxf5 10. exf5 Qh4 11. Qxh4 Nxh4 12. Nxd5 Nd4 13. Bd3 c6 14. Ne3 Rad8 15. b4 Bxb4 16. Rb1 Bc5 17. Rxb7 Rb8 18. Rxb8 Rxb8 19. g3 Nhf3+ 20. Kg2 Ne5 21. Be4 Ne2 22. Bd2 Rd8 23. Be1 f6 24. Bf3 Nd4 25. Bd1 Nxf5 26. Nxf5 Rxd1 27. Bc3 Rxf1 28. Kxf1 Kf7 29. Ke2 g6 30. Nd4 a6 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.14"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Garcia, Luis E"]
[Result "1/2-1/2"]
[ECO "B08"]
[WhiteElo "2340"]
[BlackElo "2330"]
[PlyCount "62"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 g6 2. e4 Bg7 3. d4 d6 4. Nc3 c6 5. Be2 Nf6 6. 0-0 0-0 7. a4 Qc7 8. Be3 Nbd7 9. h3 e5 10. dxe5 dxe5 11. Qd2 Re8 12. Rfd1 Bf8 13. Bc4 Nc5 14. Ng5 Ne6 15. Qe2 Nh5 16. Nxe6 Bxe6 17. Bxe6 Rxe6 18. Qc4 Qe7 19. g3 Nf6 20. Rd3 h6 21. Rad1 Kg7 22. Na2 Qc7 23. f3 Rd6 24. Qc3 Rxd3 25. Rxd3 Be7 26. Nc1 h5 27. a5 b6 28. Nb3 Rd8 29. axb6 axb6 30. Nd2 Rxd3 31. Qxd3 Nd7 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.13"]
[Round "2"]
[White "Zapata, Alonso"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C60"]
[WhiteElo "1900"]
[BlackElo "2340"]
[PlyCount "60"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. c3 d5 5. Nxe5 dxe4 6. d4 exd3 7. Bf4 Qd5 8. Qxd3 Qxg2 9. Rf1 Bf5 10. Qe2 Qe4 11. Qxe4 Bxe4 12. Nd2 Bd5 13. Nxc6 Bxc6 14. Bxc6+ Nxc6 15. Bxc7 Kd7 16. Bf4 Bd6 17. Bxd6 Rhe8+ 18. Kd1 Kxd6 19. Kc2 Re2 20. Rae1 Rae8 21. Rxe2 Rxe2 22. Kd3 Re6 23. Nc4+ Kc7 24. Rg1 g6 25. a4 Ne5+ 26. Nxe5 Rxe5 27. Rg3 Rd5+ 28. Ke2 f5 29. h4 Ra5 30. b3 Rc5 1/2-1/2

[Event "COL-ch26"]
[Site "Medellin"]
[Date "1977.03.12"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Minaya Molano, Juan M"]
[Result "1-0"]
[ECO "E67"]
[WhiteElo "2340"]
[BlackElo "2355"]
[PlyCount "61"]
[EventDate "1977.03.12"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. Nf3 Nd7 5. g3 Ngf6 6. Bg2 0-0 7. 0-0 a6 8. e4 c5 9. Re1 cxd4 10. Nxd4 Nc5 11. h3 Bd7 12. Be3 Rc8 13. Rc1 Qa5 14. a3 Na4 15. b4 Nxc3 16. Rxc3 Qa4 17. Qc1 Rc7 18. e5 Ne8 19. Bf4 Bc8 20. c5 dxe5 21. Bxe5 Bxe5 22. Rxe5 f6 23. Rd5 e6 24. Rd8 Rd7 25. Rxd7 Qxd7 26. Rc4 Ng7 27. c6 bxc6 28. Bxc6 Qd6 29. Bg2 e5 30. Rxc8 exd4 31. Qc4+ 1-0

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.09"]
[Round "13.3"]
[White "De Greif, Boris"]
[Black "Padilla Liceaga, Jorge"]
[Result "1/2-1/2"]
[ECO "A88"]
[WhiteElo "2320"]
[PlyCount "20"]
[EventDate "1976.10.25"]
[EventType "team-swiss"]
[EventRounds "13"]
[EventCountry "ISR"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Columbia"]
[BlackTeam "Honduras"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "HON"]

1. c4 f5 2. Nf3 Nf6 3. g3 g6 4. Bg2 Bg7 5. 0-0 0-0 6. Nc3 d6 7. d4 c6 8. d5 e5 9. dxe6 Bxe6 10. Qd3 Kh8 1/2-1/2

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.06"]
[Round "11.3"]
[White "De Greif, Boris"]
[Black "Janetschek, Karl"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "2320"]
[BlackElo "2355"]
[PlyCount "83"]
[EventDate "1976.10.25"]
[EventType "team-swiss"]
[EventRounds "13"]
[EventCountry "ISR"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Columbia"]
[BlackTeam "Austria"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "AUT"]

1. e4 c5 2. Nf3 e6 3. d3 Nf6 4. g3 d5 5. Nbd2 Nc6 6. Bg2 Be7 7. 0-0 0-0 8. Re1 Qc7 9. c3 b5 10. Qe2 a5 11. e5 Nd7 12. h4 a4 13. Nf1 Bb7 14. h5 b4 15. h6 g6 16. a3 bxc3 17. bxc3 Ba6 18. N1h2 Rab8 19. Bf4 Rb3 20. Qd2 Qa5 21. Rec1 d4 22. c4 Rfb8 23. Ng4 Qxd2 24. Nxd2 R3b6 25. Ne4 g5 26. Nxg5 Bxg5 27. Bxg5 Ncxe5 28. Nxe5 Nxe5 29. Rd1 Nd7 30. Re1 f6 31. Bd2 Bb7 32. Ba5 Bxg2 33. Bxb6 Bh3 34. Bc7 Rb3 35. f3 Rb2 36. g4 Kf7 37. Rab1 Ra2 38. Rb7 Bg2 39. Bd6 e5 40. Rxd7+ Ke6 41. Rxh7 Kxd6 42. Rd7+ 1-0

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.02"]
[Round "8.4"]
[White "Bonner, Gerald"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C28"]
[WhiteElo "2255"]
[BlackElo "2320"]
[PlyCount "101"]
[EventDate "1976.10.25"]
[EventType "team-swiss"]
[EventRounds "13"]
[EventCountry "ISR"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Scotland"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "SCO"]
[BlackTeamCountry "COL"]

1. e4 e5 2. Nc3 Nf6 3. Bc4 Bb4 4. d3 Nc6 5. Nf3 d6 6. Bd2 Na5 7. Nd5 Bxd2+ 8. Nxd2 Nxc4 9. dxc4 0-0 10. Ne3 a5 11. 0-0 Nd7 12. Qh5 c6 13. Rad1 Nc5 14. f4 exf4 15. Rxf4 Qe7 16. Rdf1 h6 17. Qf3 Bd7 18. Ng4 Bxg4 19. Rxg4 Qe5 20. Qf6 Qxf6 21. Rxf6 h5 22. Rg3 Rfe8 23. Rf4 Re5 24. Rf5 Rae8 25. Rgf3 f6 26. Rxe5 dxe5 27. Nb3 Nxe4 28. Nxa5 Re7 29. Rd3 Nc5 30. Rd8+ Kf7 31. b4 Ne6 32. Rb8 Nd4 33. Rxb7 Rxb7 34. Nxb7 Nxc2 35. b5 cxb5 36. cxb5 Na3 37. b6 Ke7 38. Na5 Kd7 39. Kf2 g5 40. Ke3 f5 41. b7 Kc7 42. h4 gxh4 43. b8Q+ Kxb8 44. Nc6+ Kc7 45. Nxe5 Kd6 46. Nf3 Nc2+ 47. Kf4 Nb4 48. a3 Nd5+ 49. Kg5 Kc5 50. Kxh5 Ne3 51. Kg5 1/2-1/2

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.01"]
[Round "7.4"]
[White "Goldenberg, Richard"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "A86"]
[BlackElo "2320"]
[PlyCount "116"]
[EventDate "1976.10.25"]
[EventType "team-swiss"]
[EventRounds "13"]
[EventCountry "ISR"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "France"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "FRA"]
[BlackTeamCountry "COL"]

1. g3 f5 2. d4 Nf6 3. c4 g6 4. Nc3 Bg7 5. Bg2 0-0 6. Nh3 Nc6 7. 0-0 d6 8. Nf4 e5 9. dxe5 Nxe5 10. b3 c6 11. Ba3 Nf7 12. Qc2 Qa5 13. Bb2 Bd7 14. Rad1 Rfe8 15. h4 Rad8 16. e3 Bc8 17. a3 Qc7 18. b4 Ne5 19. Nce2 Qf7 20. Rc1 h6 21. Nd3 g5 22. hxg5 hxg5 23. Nd4 Nxd3 24. Qxd3 Ng4 25. Qc2 Qh5 26. Rfe1 Be5 27. Nf3 Be6 28. Red1 Bxb2 29. Qxb2 d5 30. Nd4 dxc4 31. Nxe6 Rxd1+ 32. Rxd1 Rxe6 33. Qd4 Ne5 34. Qd8+ Re8 35. Qd6 Qg6 36. Qd4 a6 37. f4 gxf4 38. exf4 Nf7 39. Qxc4 Qxg3 40. Kf1 Qe3 41. a4 Re6 42. Bh1 Kg7 43. Qd4+ Qxd4 44. Rxd4 Nd6 45. Bf3 Kf6 46. Kf2 Ke7 47. a5 Rh6 48. Kg3 Nb5 49. Rd1 Nc7 50. Re1+ Ne6 51. Bd1 Kf6 52. Bc2 Rg6+ 53. Kf2 Nxf4 54. Re8 Rg2+ 55. Kf3 Rxc2 56. Kxf4 Rc4+ 57. Ke3 Rxb4 58. Rf8+ Ke5 0-1

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.10.31"]
[Round "6.4"]
[White "De Greif, Boris"]
[Black "Pane, L."]
[Result "1-0"]
[ECO "C28"]
[WhiteElo "2320"]
[PlyCount "99"]
[EventDate "1976.10.25"]
[EventType "team-swiss"]
[EventRounds "13"]
[EventCountry "ISR"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Columbia"]
[BlackTeam "Paraguay"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "PAR"]

1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6 4. d3 Na5 5. Nge2 Nxc4 6. dxc4 d6 7. 0-0 Be6 8. b3 c6 9. Qd3 Qc7 10. f4 Bd7 11. h3 g6 12. a4 h5 13. a5 Rd8 14. Qf3 d5 15. fxe5 dxe4 16. Nxe4 Nxe4 17. Qxe4 Bf5 18. Qf4 h4 19. Be3 Rh5 20. e6 Bd6 21. exf7+ Kxf7 22. Qf3 Kg8 23. Nd4 Be5 24. Nxf5 Bxa1 25. Qg4 Qh7 26. Nxh4 Rxh4 27. Qe6+ Kh8 28. Rxa1 Qg7 29. Rf1 Rh5 30. Rf6 Rd1+ 31. Kf2 Rd7 32. Bf4 Qe7 33. Qxe7 Rxe7 34. a6 Kg7 35. axb7 Rxb7 36. Rxc6 Rf5 37. Kg3 Re7 38. Ra6 Rff7 39. h4 Re2 40. c3 Rd7 41. Kf3 Ree7 42. Bd6 Re1 43. Bc5 Kh6 44. Be3+ Kh7 45. Bd4 Rf7+ 46. Kg3 Rd1 47. c5 Kh6 48. c6 Kh5 49. Ra5+ Kh6 50. Rd5 1-0

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.10.28"]
[Round "4.3"]
[White "De Greif, Boris"]
[Black "Diaz, Alberto"]
[Result "1/2-1/2"]
[ECO "E61"]
[WhiteElo "2320"]
[PlyCount "71"]
[EventDate "1976.10.25"]
[EventType "team-swiss"]
[EventRounds "13"]
[EventCountry "ISR"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Columbia"]
[BlackTeam "Venezuela"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "VEN"]

1. Nf3 Nf6 2. d4 g6 3. c4 Bg7 4. Nc3 0-0 5. Bg5 c5 6. e3 d6 7. Be2 h6 8. Bh4 g5 9. Bg3 Nh5 10. d5 Nd7 11. Qc2 Nxg3 12. hxg3 Nf6 13. Bd3 Re8 14. Rd1 a6 15. Kf1 Qc7 16. Nd2 Rb8 17. f3 e6 18. dxe6 Bxe6 19. Nde4 Nxe4 20. Nxe4 Red8 21. Nc3 Qc6 22. Kf2 b5 23. Be4 Qc7 24. cxb5 axb5 25. Nd5 Bxd5 26. Bxd5 Qe7 27. Qf5 Re8 28. Be4 Qe6 29. Qh7+ Kf8 30. Rd5 Qf6 31. Rhd1 Rb6 32. R1d2 Re5 33. g4 Rxd5 34. Bxd5 Qg6 35. Qxg6 fxg6 36. a3 1/2-1/2

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.10.27"]
[Round "3.4"]
[White "De Greif, Boris"]
[Black "Viglundsson, Bjorgvin"]
[Result "1-0"]
[ECO "B18"]
[WhiteElo "2320"]
[BlackElo "2310"]
[PlyCount "67"]
[EventDate "1976.10.25"]
[EventType "team-swiss"]
[EventRounds "13"]
[EventCountry "ISR"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Columbia"]
[BlackTeam "Iceland"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "ISL"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Bc4 Nf6 7. N1e2 e6 8. 0-0 Bd6 9. f4 Qd7 10. Bd3 Bxd3 11. Qxd3 g6 12. b3 Na6 13. Bb2 Be7 14. c4 0-0-0 15. Rad1 h5 16. Qf3 h4 17. Nh1 Rh5 18. Nf2 Ra5 19. a4 Nb4 20. Bc3 Rh5 21. Qe3 Kb8 22. g4 hxg3 23. Nxg3 Rdh8 24. Nxh5 Rxh5 25. h3 Rf5 26. Ng4 a5 27. Bxb4 axb4 28. Ne5 Qe8 29. a5 Nh5 30. a6 g5 31. d5 c5 32. dxe6 gxf4 33. exf7 Qh8 34. Qe4 1-0

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.06.02"]
[Round "17"]
[White "De Greif, Boris"]
[Black "Garcia, Gilberto"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "2320"]
[PlyCount "81"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d3 b6 3. Nf3 Bb7 4. g3 Be7 5. Bg2 d6 6. Nbd2 Nd7 7. Nc4 Bf6 8. h4 Qe7 9. Qe2 h6 10. a4 a5 11. Kf1 g6 12. e5 Bg7 13. exd6 cxd6 14. Bf4 e5 15. Re1 Kf8 16. Bc1 Ngf6 17. b3 Kg8 18. Ba3 Ne8 19. Nfd2 Nc5 20. Nxb6 Bxg2+ 21. Kxg2 Qb7+ 22. Qf3 e4 23. Nxe4 Qxb6 24. Nxc5 Rc8 25. Re7 dxc5 26. Qxf7+ Kh7 27. Bb2 Qc6+ 28. Kh2 Rg8 29. Re6 Nf6 30. Rxc6 Rxc6 31. Re1 Rf8 32. Qb7 Rd6 33. Re7 Rg8 34. f3 g5 35. hxg5 hxg5 36. g4 Kg6 37. Bxf6 Rxf6 38. Qe4+ Kh6 39. Kg2 Rh8 40. Re6 Rhf8 41. Qc6 1-0

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.06.01"]
[Round "16"]
[White "Garcia, Wilfredo"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A42"]
[WhiteElo "2305"]
[BlackElo "2320"]
[PlyCount "115"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 Nc6 5. Be3 e5 6. Nge2 f5 7. f3 Nf6 8. d5 Ne7 9. Qd2 fxe4 10. fxe4 Ng4 11. Bg5 h6 12. Bh4 g5 13. Bg3 Ng6 14. 0-0-0 0-0 15. Ng1 c5 16. Nf3 Nf6 17. Bd3 a6 18. Rdf1 Nh5 19. Bf2 Qa5 20. Be3 Bd7 21. Be2 Nhf4 22. Ne1 b5 23. Kb1 Rfb8 24. g3 Nxe2 25. Nxe2 Qxd2 26. Bxd2 bxc4 27. h4 gxh4 28. gxh4 Nf4 29. Nc3 Kh7 30. Kc2 Rf8 31. Bxf4 exf4 32. Nf3 Rae8 33. Nd2 Be5 34. Nxc4 Bb5 35. Nxb5 axb5 36. Nxe5 Rxe5 37. Kd3 f3 38. Rf2 Rf4 39. Re1 Kg6 40. Re3 Kh5 41. Rfxf3 Rexe4 42. Rxf4 Rxf4 43. Re6 Rd4+ 44. Kc3 Rxd5 45. b3 Rd4 46. a4 bxa4 47. bxa4 Kxh4 48. a5 h5 49. a6 Kg3 50. Re3+ Kf4 51. Rd3 Ra4 52. Rxd6 h4 53. Kb3 Ra5 54. Kc4 h3 55. Rh6 Kg3 56. Rg6+ Kf2 57. Rh6 Kg2 58. Rg6+ 1/2-1/2

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.05.31"]
[Round "15"]
[White "De Greif, Boris"]
[Black "Szmetan, Jorge"]
[Result "1/2-1/2"]
[ECO "A47"]
[WhiteElo "2320"]
[BlackElo "2450"]
[PlyCount "81"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. c3 e6 4. g3 b6 5. Bg2 Bb7 6. 0-0 Be7 7. Nbd2 0-0 8. Re1 cxd4 9. Nxd4 Bxg2 10. Kxg2 Nc6 11. Nxc6 dxc6 12. Nf3 Qc8 13. Bg5 h6 14. Bxf6 Bxf6 15. Qa4 Rd8 16. Rad1 Qb7 17. Rxd8+ Rxd8 18. Rd1 Rd5 19. e4 b5 20. Qc2 Rxd1 21. Qxd1 c5 22. Qe2 c4 23. a3 a6 24. Kf1 Be7 25. h4 Bc5 26. Nd2 Qc6 27. a4 Be7 28. axb5 axb5 29. Ke1 Qa8 30. Qd1 Bc5 31. Ke2 Qd8 32. Kf1 Qd3+ 33. Qe2 Qc2 34. Nf3 Qb1+ 35. Kg2 Qa2 36. Qd2 Qa8 37. Qf4 Qb7 38. h5 Be7 39. Qe3 Bf6 40. Nd2 Qc6 41. Nf3 1/2-1/2

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.05.30"]
[Round "14"]
[White "Andres Mendez, Miguel"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A81"]
[WhiteElo "2355"]
[BlackElo "2320"]
[PlyCount "18"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. Nf3 g6 2. g3 Bg7 3. Bg2 f5 4. 0-0 Nf6 5. d4 0-0 6. Nbd2 d6 7. Re1 Nc6 8. e4 e5 9. dxe5 dxe5 1/2-1/2

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.05.29"]
[Round "13"]
[White "De Greif, Boris"]
[Black "Barreras, Alberto"]
[Result "1/2-1/2"]
[ECO "C26"]
[WhiteElo "2320"]
[BlackElo "2340"]
[PlyCount "185"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. g3 d5 4. exd5 Nxd5 5. Bg2 Nxc3 6. bxc3 Nc6 7. Ne2 Bc5 8. 0-0 0-0 9. Rb1 Bb6 10. d3 Bg4 11. h3 Bh5 12. g4 Bg6 13. Ng3 Ne7 14. Ba3 c6 15. Qe2 Re8 16. c4 Qc7 17. Kh1 Rad8 18. h4 h6 19. h5 Bh7 20. Rg1 f5 21. c5 Ba5 22. Bb2 Nd5 23. gxf5 Qe7 24. Qg4 Nf6 25. Qh3 Qxc5 26. Ne4 Qe7 27. Nxf6+ Qxf6 28. Be4 Bb6 29. Rg2 Rd7 30. f4 Bd4 31. Bxd4 exd4 32. Rbg1 Rf8 33. Rg6 Bxg6 34. Rxg6 Qe7 35. Qg4 Rf6 36. Kg2 c5 37. Kf3 b5 38. Qg1 a6 39. Qb1 Rxg6 40. fxg6 Qh4 41. Qb3+ c4 42. Qa3 Qh3+ 43. Kf2 Qe3+ 44. Kg2 Qxf4 45. Qxa6 Qg5+ 46. Kf2 Rd8 47. Qe6+ Kh8 48. Qf7 Qc5 49. Kg2 Rf8 50. Qd5 Qb4 51. Qxd4 Qd2+ 52. Kh3 Qxc2 53. dxc4 Qxc4 54. Qd5 Re8 55. Bf3 Qf4 56. Kg2 Qe5 57. Kh3 Qb8 58. Qf5 Re5 59. Qc2 Rg5 60. Bg4 Qa8 61. Kg3 Qa3+ 62. Kf2 Qf8+ 63. Kg3 Qd6+ 64. Kf3 Rc5 65. Qe4 Rc3+ 66. Ke2 Qb8 67. Kd2 Ra3 68. Be6 Ra4 69. Qd3 Qh2+ 70. Kc1 Qg1+ 71. Kb2 Rd4 72. Qc2 Qg5 73. Kb1 Rd8 74. Qe2 Rd2 75. Qf1 Qf6 76. Qc1 Qd8 77. Bb3 Rh2 78. Qc5 Qb8 79. Bc2 Rg2 80. Qb4 Qc8 81. Qe4 Rh2 82. Bd1 Qd8 83. Be2 Rh4 84. Qc6 Rb4+ 85. Kc1 Ra4 86. Kb1 Qg8 87. Qc2 Qe6 88. Qd2 Qe4+ 89. Kc1 Rd4 90. Qc3 Qf4+ 91. Kc2 Qf5+ 92. Bd3 Qg4 93. Qc5 1/2-1/2

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.05.28"]
[Round "12"]
[White "Cuartas, Carlos Enrique"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C26"]
[WhiteElo "2425"]
[BlackElo "2320"]
[PlyCount "19"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 0-0 5. Nge2 c6 6. d4 d5 7. exd5 exd4 8. Qxd4 Nxd5 9. 0-0 Nxc3 10. bxc3 1/2-1/2

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.05.27"]
[Round "11"]
[White "Ostos, Julio Eduardo"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "C60"]
[WhiteElo "2255"]
[BlackElo "2320"]
[PlyCount "143"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. 0-0 g6 5. c3 Bg7 6. d4 exd4 7. cxd4 d5 8. exd5 Nxd5 9. Re1+ Be6 10. Ne5 0-0 11. Nxc6 bxc6 12. Bxc6 Rb8 13. Nc3 Nb4 14. Be4 Bxd4 15. Bh6 Bxf2+ 16. Kxf2 Qh4+ 17. Kg1 Qxh6 18. Qd4 a5 19. a3 Na6 20. Bd5 Rb6 21. Bxe6 fxe6 22. Rf1 Rd6 23. Qe5 Rf5 24. Rxf5 gxf5 25. Re1 Qg7 26. Qxa5 Qd4+ 27. Kh1 Nc5 28. Nb5 Qd2 29. Qxd2 Rxd2 30. b4 Nd3 31. Ra1 c5 32. bxc5 Nxc5 33. a4 Nxa4 34. g4 Nc5 35. gxf5 exf5 36. Rf1 Rd5 37. Nc3 Re5 38. Kg2 Kg7 39. Ra1 Ne6 40. Kf3 Rc5 41. Ne2 Kf6 42. Ra3 Rc4 43. Ra6 h5 44. Ng3 h4 45. Ne2 Rb4 46. Ke3 Re4+ 47. Kf3 Kg5 48. Ra8 Rb4 49. Ra3 Nc5 50. Re3 Rb2 51. Re5 Nd7 52. Ra5 Rb3+ 53. Kf2 Rd3 54. Ng1 h3 55. Nf3+ Kg4 56. Ne5+ Nxe5 57. Rxe5 Rd1 58. Re2 Rh1 59. Ke3 f4+ 60. Ke4 Rf1 61. Kd4 Kf3 62. Ra2 Rf2 63. Ra3+ Kg4 64. Ra8 Rxh2 65. Rg8+ Kf3 66. Rh8 Rh1 67. Ke5 h2 68. Kf5 Ra1 69. Rxh2 Ra5+ 70. Ke6 Kg3 71. Rh1 f3 72. Rg1+ 0-1

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.05.26"]
[Round "10"]
[White "De Greif, Boris"]
[Black "Hernandez, Jose de Jesus"]
[Result "1/2-1/2"]
[ECO "A05"]
[WhiteElo "2320"]
[BlackElo "2300"]
[PlyCount "55"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. Nf3 e6 2. b3 c5 3. Bb2 Nf6 4. e3 Be7 5. Be2 0-0 6. 0-0 b6 7. d3 d5 8. Nbd2 Bb7 9. Ne5 Nc6 10. Ndf3 Nxe5 11. Nxe5 Nd7 12. Nxd7 Qxd7 13. f4 Qd8 14. Bf3 Bf6 15. Qc1 Rb8 16. a4 a5 17. Rb1 Re8 18. Bxf6 Qxf6 19. Qd2 Red8 20. Rbe1 Rd7 21. e4 dxe4 22. Bxe4 Bxe4 23. Rxe4 Rbd8 24. Re5 g6 25. Qe3 Rd4 26. g3 Kg7 27. h4 h5 28. Re1 1/2-1/2

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.05.25"]
[Round "9"]
[White "Sieiro Gonzalez, Luis"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "B15"]
[BlackElo "2320"]
[PlyCount "86"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nf3 c6 4. h3 d6 5. Be2 Nf6 6. Nc3 0-0 7. a4 d5 8. e5 Ne4 9. 0-0 c5 10. Bd3 Nxc3 11. bxc3 Nc6 12. Ba3 c4 13. Be2 f6 14. exf6 Bxf6 15. Nh2 Qa5 16. Qe1 Re8 17. Ng4 Bf5 18. Nh6+ Kg7 19. Nxf5+ gxf5 20. Bh5 Rf8 21. Kh1 Kh8 22. f4 Bg7 23. Rf3 Rf6 24. Re3 e6 25. Bc1 Rg8 26. Bd2 Nd8 27. Qe2 b5 28. g4 bxa4 29. g5 Rff8 30. Bc1 e5 31. Ba3 e4 32. Qf2 Ne6 33. Bg6 Qc7 34. Bxf8 Bxf8 35. Bxf5 Nxf4 36. Rf1 Bd6 37. Qh4 Ng6 38. Bxg6 Rxg6 39. Rf6 Rxf6 40. gxf6 Qf7 41. Re1 a3 42. Qg5 a5 43. Rb1 a4 1/2-1/2

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.05.24"]
[Round "8"]
[White "De Greif, Boris"]
[Black "Pesantes Carbajal, Carlos"]
[Result "1-0"]
[ECO "E42"]
[WhiteElo "2320"]
[BlackElo "2325"]
[PlyCount "71"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nge2 d5 6. a3 Bxc3+ 7. Nxc3 cxd4 8. exd4 0-0 9. Be3 b6 10. cxd5 Nxd5 11. Qf3 Bb7 12. Bd3 f5 13. 0-0 Rf7 14. Qh3 Nd7 15. Rfe1 Nf8 16. Rad1 Rc8 17. Bd2 Qd7 18. Bb1 Rf6 19. Ba2 Nxc3 20. Bxc3 Rg6 21. d5 exd5 22. Re5 Kh8 23. Qxf5 Qxf5 24. Rxf5 d4 25. Rxd4 Rxg2+ 26. Kf1 Rxh2 27. Rg4 Ng6 28. Rf7 Rh1+ 29. Rg1 Ba6+ 30. Kg2 Rxg1+ 31. Kxg1 Rc5 32. Bxg7+ Kg8 33. Rc7+ Bc4 34. Bxc4+ Rxc4 35. Rxc4 Kxg7 36. Rc7+ 1-0

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.05.23"]
[Round "7"]
[White "Frey Beckman, Kenneth"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "D07"]
[WhiteElo "2295"]
[BlackElo "2320"]
[PlyCount "84"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4 5. Bxc4 e6 6. Nc3 Nc6 7. 0-0 Bd6 8. Be2 0-0 9. h3 Bh5 10. e4 Bxf3 11. Bxf3 Nxd4 12. Be3 e5 13. g3 Bc5 14. Bg2 Ne6 15. Qe2 c6 16. Bxc5 Nxc5 17. Rfd1 Qe7 18. h4 Rfd8 19. Bh3 Rd4 20. Bg2 Rad8 21. Rdb1 a5 22. Kf1 h6 23. Bf3 R8d7 24. Qe3 Qd8 25. Re1 Qb6 26. Red1 Rd3 27. Rxd3 Rxd3 28. Qe2 Qd8 29. Ke1 Rd4 30. Qe3 Qd6 31. Kf1 Rd3 32. Qe2 Rd2 33. Qe3 Qd4 34. Qxd4 exd4 35. Ne2 Nfxe4 36. Ke1 Nd3+ 37. Kf1 f5 38. Nxd4 Rxf2+ 39. Kg1 c5 40. Bxe4 fxe4 41. Nb3 e3 42. Nxa5 Ne5 0-1

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.05.22"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Pineda, Boris"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "2320"]
[PlyCount "68"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3 Bg4 6. Be2 e6 7. Be3 cxd4 8. cxd4 Bb4+ 9. Nc3 Nf6 10. h3 Bh5 11. 0-0 Bxc3 12. bxc3 0-0 13. Qb3 Na5 14. Qa4 Rfc8 15. Rab1 a6 16. Qb4 Qxa2 17. Rb2 Qd5 18. g4 Bg6 19. Ne5 Nc6 20. Nxc6 bxc6 21. c4 Qd8 22. Ra1 Rcb8 23. Qa3 h5 24. Bf4 Rxb2 25. Qxb2 hxg4 26. hxg4 Qc8 27. Qb6 e5 28. dxe5 Nxg4 29. f3 Qf5 30. Qxc6 Qxf4 31. Qxa8+ Kh7 32. fxg4 Be4 33. Qxa6 Qg3+ 34. Kf1 Bg2+ 0-1

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.05.21"]
[Round "5"]
[White "Perez Perez, Francisco Jose"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "D79"]
[BlackElo "2320"]
[PlyCount "21"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. Nf3 g6 2. g3 Bg7 3. Bg2 d5 4. 0-0 Nf6 5. c4 c6 6. cxd5 cxd5 7. d4 0-0 8. Nc3 b6 9. Bf4 Bb7 10. Rc1 Nc6 11. Ne5 1/2-1/2

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.05.20"]
[Round "4"]
[White "De Greif, Boris"]
[Black "Rodriguez Cordoba, Jesus R"]
[Result "1/2-1/2"]
[ECO "C50"]
[WhiteElo "2320"]
[PlyCount "36"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6 5. d3 h6 6. Be3 Bb6 7. Nd5 d6 8. Nxb6 axb6 9. h3 Be6 10. Bb5 0-0 11. Bxc6 bxc6 12. 0-0 c5 13. c4 Nd7 14. g4 g5 15. Kg2 Kg7 16. Ng1 Rh8 17. Ne2 Nf8 18. Ng3 Ng6 1/2-1/2

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.05.19"]
[Round "3"]
[White "Durao, Joaquim Manuel"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "B15"]
[WhiteElo "2325"]
[BlackElo "2320"]
[PlyCount "31"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. Be3 d5 5. e5 h5 6. Nge2 Nh6 7. Nf4 Bf5 8. Bd3 e6 9. 0-0 Nd7 10. Be2 Qe7 11. f3 0-0-0 12. a3 Nxe5 13. dxe5 d4 14. Bxd4 c5 15. Nb5 cxd4 16. Nd6+ 1/2-1/2

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.05.18"]
[Round "2"]
[White "De Greif, Boris"]
[Black "Remon, Adelquis"]
[Result "0-1"]
[ECO "E61"]
[WhiteElo "2320"]
[PlyCount "84"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. e3 g6 4. c4 Bg7 5. Nc3 0-0 6. Be2 Nc6 7. d5 Nb4 8. 0-0 d6 9. a3 Na6 10. Qc2 Nc7 11. Rd1 a6 12. Rb1 Bg4 13. h3 Bxf3 14. Bxf3 b5 15. b3 Rb8 16. Bd2 Nd7 17. Be2 Rb7 18. Na2 Qa8 19. Ba5 Rfb8 20. Nc3 Ne8 21. Ne4 bxc4 22. Bxc4 Ne5 23. Bc3 Nc7 24. Bxe5 Bxe5 25. f4 Bg7 26. a4 Rb4 27. Rd3 Qb7 28. Rf1 Qc8 29. g4 Nb5 30. axb5 axb5 31. Nd2 bxc4 32. Nxc4 Qb7 33. Na5 Qb5 34. Nc6 Rxb3 35. Rxb3 Qxb3 36. Qe4 Re8 37. f5 Bf6 38. Rf3 Ra8 39. Rf1 Ra2 40. fxg6 Qb2 41. Nxe7+ Bxe7 42. gxf7+ Kg7 0-1

[Event "Capablanca Memorial-13 Group B"]
[Site "Cienfuegos"]
[Date "1976.05.17"]
[Round "1"]
[White "Verduga Zavala, Denis"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A36"]
[WhiteElo "2265"]
[BlackElo "2320"]
[PlyCount "21"]
[EventDate "1976.05.17"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "3"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. c4 g6 2. Nc3 Bg7 3. g3 c5 4. Bg2 Nc6 5. d3 Nf6 6. a3 0-0 7. Rb1 a5 8. Bd2 d6 9. Qc1 Bd7 10. Bh6 a4 11. h4 1/2-1/2

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.21"]
[Round "11"]
[White "De Greif, Boris"]
[Black "Yepez Jaramillo, Marcos Vinicio"]
[Result "1-0"]
[ECO "D41"]
[WhiteElo "2320"]
[PlyCount "81"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. e3 cxd4 4. exd4 d5 5. c4 e6 6. Nc3 Be7 7. cxd5 Nxd5 8. Bd3 Nxc3 9. bxc3 Qc7 10. Qc2 Nd7 11. 0-0 Nf6 12. Re1 0-0 13. Ne5 h6 14. Re3 Nd7 15. Qe2 Nxe5 16. dxe5 Bg5 17. Rg3 Bxc1 18. Rxc1 f5 19. exf6 Rxf6 20. Rd1 e5 21. Be4 Be6 22. Qb5 Raf8 23. f3 b6 24. Qb2 Qc4 25. Qd2 Rf4 26. h3 R4f6 27. Kh2 Kh8 28. Qd6 Qxa2 29. Qxe5 Qe2 30. Rd6 Qa2 31. Rc6 Bg8 32. Rc7 Bf7 33. Qe7 Re8 34. Qd7 a5 35. Rxg7 Kxg7 36. Qxe8 Qd2 37. Qe7 Qd6+ 38. Qxd6 Rxd6 39. c4 Kf6 40. Kg3 a4 41. Kf4 1-0

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.20"]
[Round "10"]
[White "Garcia, Luis E"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "A04"]
[WhiteElo "2350"]
[BlackElo "2320"]
[PlyCount "78"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. c4 g6 2. Nc3 Bg7 3. g3 c5 4. Bg2 Nc6 5. Nf3 e6 6. 0-0 d5 7. cxd5 exd5 8. d4 cxd4 9. Nb5 a6 10. Nbxd4 Nge7 11. Be3 0-0 12. Qd2 Re8 13. Rfd1 Bg4 14. h3 Bxf3 15. Bxf3 Ne5 16. Bg5 Nxf3+ 17. Nxf3 Qd7 18. Bxe7 Rxe7 19. Kg2 Qb5 20. e3 Qxb2 21. Qxb2 Bxb2 22. Rab1 Bg7 23. Rxd5 Rc8 24. a4 h6 25. Rd3 Rc2 26. Rd8+ Kh7 27. Rb3 Rb2 28. Rxb2 Bxb2 29. Rb8 Kg7 30. Kf1 Rd7 31. Ke2 Bc3 32. Rc8 Bf6 33. Nd2 Be7 34. Nb3 b5 35. axb5 axb5 36. Rb8 b4 37. Nd4 Rc7 38. Kd2 h5 39. Nc2 Rc4 0-1

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.19"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Minaya Molano, Juan M"]
[Result "0-1"]
[ECO "A04"]
[WhiteElo "2320"]
[BlackElo "2325"]
[PlyCount "78"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d3 g6 4. g3 Bg7 5. Bg2 d6 6. Nbd2 e6 7. 0-0 Nge7 8. Re1 0-0 9. a4 e5 10. c3 h6 11. Nc4 Be6 12. Rb1 f5 13. exf5 Nxf5 14. b3 Qd7 15. h3 Rf7 16. Rb2 Raf8 17. Rc2 Nfe7 18. g4 Bd5 19. Ncd2 Nd8 20. c4 Bc6 21. Ne4 Ne6 22. Nh2 b6 23. Nf1 Nd4 24. Rb2 d5 25. cxd5 Nxd5 26. Nfg3 Nf4 27. Re3 a5 28. Kh2 Bd5 29. h4 Nxg2 30. Kxg2 Nf3 31. Qxf3 Rxf3 32. Rxf3 Qxg4 33. Rxf8+ Kxf8 34. h5 gxh5 35. f3 Qg6 36. Kh2 Be6 37. Rg2 Bxb3 38. Ne2 Qc6 39. N2c3 Bf7 0-1

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.18"]
[Round "8"]
[White "Gonzalez Rodriguez, Jorge Armando"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A00"]
[BlackElo "2320"]
[PlyCount "46"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 dxe4 3. Nxe4 e5 4. Bc4 Nc6 5. Nf3 Be7 6. d3 Nf6 7. Nfg5 0-0 8. Nxf7 Rxf7 9. Ng5 Nd5 10. Nxf7 Kxf7 11. Qf3+ Ke6 12. Be3 Na5 13. 0-0-0 c6 14. Rhe1 Qf8 15. Bxd5+ cxd5 16. Qg3 Nc6 17. Bf4 Kf7 18. Bxe5 Kg8 19. Kb1 Bf5 20. f4 Qf7 21. Rd2 d4 22. a3 Nxe5 23. fxe5 Be6 1/2-1/2

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.17"]
[Round "7"]
[White "De Greif, Boris"]
[Black "Cuartas, Carlos Enrique"]
[Result "0-1"]
[ECO "B06"]
[WhiteElo "2320"]
[BlackElo "2425"]
[PlyCount "106"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 g6 2. e4 Bg7 3. d4 c6 4. Nbd2 d6 5. Be2 Nh6 6. 0-0 0-0 7. c3 d5 8. h3 Nd7 9. exd5 cxd5 10. Qb3 Nb8 11. Ne5 Nc6 12. Nxc6 bxc6 13. Nf3 Qc7 14. Qa4 f6 15. Ne1 e5 16. Nd3 Nf7 17. Be3 Nd6 18. Nb4 Bb7 19. Na6 Bxa6 20. Bxa6 Rab8 21. b4 f5 22. Rac1 f4 23. dxe5 fxe3 24. exd6 exf2+ 25. Kh1 Qxd6 26. Qd1 Bh6 27. Rc2 Be3 28. Qg4 Rbe8 29. Bd3 Kg7 30. c4 h5 31. c5 Qf6 32. Qg3 Bd4 33. Rcxf2 Bxf2 34. Rxf2 Re1+ 35. Kh2 Qe5 36. Qxe5+ Rxe5 37. Rd2 Rf4 38. Rb2 Re3 39. Ba6 d4 40. Rd2 d3 41. a3 Rd4 42. Kg1 Re1+ 43. Kf2 Ra1 44. Ke3 Rd8 45. Rxd3 Rxd3+ 46. Bxd3 Rxa3 47. Kd4 Kf6 48. Be4 Ra4 49. Bxc6 Rxb4+ 50. Kd5 Ke7 51. Ke5 a5 52. Bd5 a4 53. c6 Rb5 0-1

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.15"]
[Round "6"]
[White "Martinez, Carlos Alejandro"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B12"]
[BlackElo "2320"]
[PlyCount "93"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nf3 c6 4. Nbd2 d5 5. c3 Bg4 6. h3 Bxf3 7. Qxf3 e6 8. Bd3 Nf6 9. 0-0 0-0 10. Re1 a5 11. exd5 cxd5 12. Nf1 Qb6 13. Qf4 Nc6 14. Qh4 Rfe8 15. Bg5 Nd7 16. Re2 a4 17. Rae1 Na5 18. Ne3 Rec8 19. Ng4 Nc4 20. Nh6+ Bxh6 21. Bxh6 Qd8 22. Qg3 Rc6 23. h4 Qf6 24. h5 Rac8 25. Bg5 Qg7 26. hxg6 hxg6 27. a3 Rb6 28. Bc1 Nf6 29. Qh4 Rbc6 30. Bh6 Qh8 31. Qg5 Ng4 32. Qxg4 Qxh6 33. Qg3 Nd6 34. Re5 Rb6 35. Rg5 Nf5 36. Bxf5 exf5 37. Rxf5 Rxb2 38. Rxd5 Qd2 39. Rde5 Kg7 40. Re7 Rc6 41. Qe5+ Rf6 42. Rf1 Qxc3 43. Re8 Qxa3 44. Qh2 g5 45. Qh8+ Kg6 46. Rg8+ Kf5 47. g4+ 1-0

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.14"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Castro Murillo, Gonzalo Fernando"]
[Result "1-0"]
[ECO "A04"]
[WhiteElo "2320"]
[PlyCount "89"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 c5 2. g3 g6 3. Bg2 Bg7 4. 0-0 d6 5. d3 Nc6 6. Nbd2 Nh6 7. c3 0-0 8. a4 Rb8 9. e4 Ng4 10. h3 Nge5 11. Ne1 f5 12. f4 Nf7 13. exf5 gxf5 14. Qh5 e6 15. g4 Ne7 16. Nef3 Ng6 17. Nc4 d5 18. Nce5 Ngxe5 19. fxe5 Nxe5 20. Nxe5 Bxe5 21. Bh6 Bg7 22. gxf5 Bxh6 23. Qxh6 exf5 24. Rae1 b5 25. Re3 Kh8 26. Rg3 Qe7 27. a5 Bb7 28. Kh2 Rbd8 29. Qf4 Qd6 30. d4 cxd4 31. Qxd4+ Qf6 32. Rxf5 Qxd4 33. Rxf8+ Rxf8 34. cxd4 Rf4 35. Rc3 Kg7 36. Kg3 Rf7 37. Rc5 Rd7 38. Rxb5 Kf6 39. Kf4 Ke6 40. Rc5 Rg7 41. Bf3 Kd6 42. b4 Rf7+ 43. Ke3 Re7+ 44. Kf2 Rc7 45. Rxc7 1-0

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.13"]
[Round "4"]
[White "Gutierrez Herrera, Jose Antonio"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C60"]
[BlackElo "2320"]
[PlyCount "54"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. 0-0 g6 5. c3 Bg7 6. d4 exd4 7. cxd4 d5 8. exd5 Nxd5 9. Re1+ Be6 10. Bg5 Qd6 11. Nbd2 0-0 12. Ne4 Qb4 13. Bxc6 bxc6 14. Qc1 Rab8 15. b3 Rb6 16. Nc5 Bxd4 17. Nxd4 Qxd4 18. Re4 Qc3 19. Nxe6 Qxc1+ 20. Rxc1 fxe6 21. Rxe6 Ra6 22. Bh6 Rd8 23. h3 Rxa2 24. Rexc6 Ra5 25. b4 Rb5 26. Ra6 Rxb4 27. Rxa7 Rdb8 1/2-1/2

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.12"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Cuellar Gacharna, Miguel"]
[Result "1/2-1/2"]
[ECO "E60"]
[WhiteElo "2320"]
[BlackElo "2345"]
[PlyCount "151"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. b3 g6 3. Bb2 Bg7 4. e3 0-0 5. Be2 d6 6. d4 e5 7. c4 Nc6 8. 0-0 e4 9. Nfd2 Re8 10. Nc3 Bf5 11. a3 a5 12. Nb5 h5 13. Rc1 Bg4 14. Nc3 Bf5 15. Rc2 Rc8 16. Nb5 Ng4 17. g3 Qg5 18. h4 Qe7 19. Kg2 Bh6 20. Rc3 Kh7 21. Rh1 Rg8 22. Nf1 g5 23. d5 Nce5 24. Nd4 Qf6 25. hxg5 Rxg5 26. Rc2 Rcg8 27. Rd2 Bd7 28. Qe1 Qg6 29. Rh4 c5 30. dxc6 bxc6 31. Bc1 c5 32. Nb5 Bf8 33. Nc3 Bc6 34. Nd5 Bxd5 35. Rxd5 Nf3 36. Bxf3 exf3+ 37. Kg1 Rxd5 38. cxd5 Be7 39. Rh1 h4 40. e4 Bf6 41. Bf4 Re8 42. Nd2 Kg8 43. Nxf3 Rxe4 44. Qd2 hxg3 45. Bxg3 Ne5 46. Nxe5 Bxe5 47. Qxa5 Kg7 48. Rh3 Rg4 49. Qe1 Qd3 50. Kh2 Bxg3+ 51. Rxg3 Rxg3 52. fxg3 Qxb3 53. Qd2 f6 54. Kh3 Kg6 55. Kh4 Qf3 56. g4 c4 57. a4 Qd3 58. Qa5 Qe2 59. Kg3 Kg5 60. Qc3 Qxg4+ 61. Kf2 Qf5+ 62. Qf3 Qc2+ 63. Kg3 Qb3 64. a5 f5 65. a6 f4+ 66. Kg2 Qa2+ 67. Kh3 Qxa6 68. Qg4+ Kf6 69. Qxf4+ Ke7 70. Qg5+ Kd7 71. Qg7+ Kc8 72. Kg4 Qb6 73. Kf3 Qc5 74. Ke4 Qf2 75. Qg8+ Kc7 76. Qg7+ 1/2-1/2

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.11"]
[Round "2"]
[White "Panno, Oscar"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A41"]
[WhiteElo "2520"]
[BlackElo "2320"]
[PlyCount "79"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. c4 g6 2. e4 Bg7 3. d4 d6 4. Be3 Nc6 5. f3 e5 6. Ne2 exd4 7. Nxd4 Nxd4 8. Bxd4 Bxd4 9. Qxd4 Qh4+ 10. g3 Qf6 11. Qf2 Ne7 12. Nc3 Bd7 13. 0-0-0 a6 14. f4 Bc6 15. h4 h5 16. Bh3 b5 17. Nd5 Nxd5 18. cxd5 Bb7 19. Kb1 0-0 20. Rc1 Qe7 21. Rhe1 Bc8 22. Bg2 f6 23. Qc2 Ra7 24. Ka1 Kh7 25. Qc3 Bg4 26. e5 fxe5 27. fxe5 dxe5 28. Rxe5 Qg7 29. Qe3 c5 30. dxc6 Raf7 31. Be4 Rf1 32. Rg5 R8f6 33. a3 Rxc1+ 34. Qxc1 Qc7 35. Qc3 Rf1+ 36. Ka2 Be6+ 37. Bd5 Qf7 38. Qb3 Bxd5 39. Rxd5 Qf2 40. Rd7+ 1-0

[Event "Bogota"]
[Site "Bogota"]
[Date "1976.04.10"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "0-1"]
[ECO "C44"]
[WhiteElo "2320"]
[BlackElo "2380"]
[PlyCount "110"]
[EventDate "1976.04.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "COL"]
[EventCategory "4"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 Nc6 2. d4 e5 3. Nf3 exd4 4. c3 d5 5. exd5 Qxd5 6. cxd4 Bg4 7. Be2 0-0-0 8. Nc3 Qa5 9. Be3 Nf6 10. 0-0 Bc5 11. Nb5 Bxf3 12. gxf3 Nxd4 13. Nxd4 Qb6 14. Qb3 Bxd4 15. Bc4 Qxb3 16. axb3 a6 17. Bxf7 Rhf8 18. Be6+ Kb8 19. f4 Bxb2 20. Rad1 Ne4 21. Bf5 Nd2 22. Rxd2 Rxd2 23. Bxd2 Rxf5 24. Re1 Kc8 25. Kg2 a5 26. Kf3 Rd5 27. Re2 Bf6 28. Ke4 Rb5 29. Re3 b6 30. Rd3 Rc5 31. f5 Re5+ 32. Kf4 Re8 33. Bc3 Bxc3 34. Rxc3 Re2 35. Rg3 Rxf2+ 36. Ke5 Re2+ 37. Kd5 Re7 38. Rh3 Rf7 39. Ke6 Rf6+ 40. Ke5 h6 41. Rg3 Rf7 42. Rg6 Kd7 43. h4 Re7+ 44. Kd4 c6 45. h5 Rf7 46. Ke5 b5 47. Rg1 Re7+ 48. Kd4 Kc7 49. Rg6 Rd7+ 50. Kc3 Rf7 51. f6 Rxf6 52. Rxg7+ Kd6 53. Kd4 Rf4+ 54. Ke3 Rb4 55. Rg6+ Kd5 0-1

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.27"]
[Round "17"]
[White "Garcia, Wilfredo"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E19"]
[PlyCount "21"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. Nc3 Ne4 7. Qc2 Nxc3 8. Qxc3 0-0 9. 0-0 f5 10. b3 Bf6 11. Bb2 1/2-1/2

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.24"]
[Round "16"]
[White "De Greif, Boris"]
[Black "Andres Mendez, Miguel"]
[Result "1/2-1/2"]
[ECO "B25"]
[PlyCount "25"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. g3 g6 2. Bg2 Bg7 3. f4 c5 4. e4 Nc6 5. Nf3 d6 6. d3 e6 7. 0-0 Nge7 8. Nc3 0-0 9. Be3 Nd4 10. Qd2 Rb8 11. Nd1 b6 12. c3 Nxf3+ 13. Bxf3 1/2-1/2

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.23"]
[Round "15"]
[White "Serrano, Waldo"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E60"]
[PlyCount "23"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 0-0 5. Bg2 c5 6. c4 Nc6 7. 0-0 d6 8. d4 cxd4 9. Nxd4 Bd7 10. Nc3 Qa5 11. h3 Rfc8 12. e3 1/2-1/2

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.22"]
[Round "14"]
[White "De Greif, Boris"]
[Black "Fernandez Bravo, Ciro Angel"]
[Result "1/2-1/2"]
[ECO "A55"]
[PlyCount "48"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e5 3. g3 d6 4. Bg2 c6 5. d4 Nbd7 6. Nf3 Be7 7. 0-0 0-0 8. Qc2 Re8 9. b3 Bf8 10. e4 a5 11. h3 g6 12. Be3 exd4 13. Nxd4 Nc5 14. Rfe1 Nfd7 15. Rad1 Bg7 16. Nde2 Qe7 17. Rd2 Nf6 18. f3 Be6 19. Red1 Rad8 20. e5 Bf5 21. Qc1 Qxe5 22. Bf4 Qe7 23. g4 Bc8 24. Rxd6 Ne6 1/2-1/2

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.20"]
[Round "13"]
[White "Soler, Alberto"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "B15"]
[PlyCount "119"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. Nf3 d5 5. Be2 Bg4 6. Be3 Nf6 7. e5 Nfd7 8. 0-0 0-0 9. Ng5 Bxe2 10. Nxe2 e6 11. f4 Qe7 12. g4 f6 13. exf6 Nxf6 14. Ng3 Nbd7 15. Qe2 Rae8 16. Rae1 h6 17. Nh3 Nh7 18. Qd3 Qh4 19. Nf2 Rf6 20. Kg2 Ndf8 21. Ne2 Rf7 22. Ng1 Qd8 23. Nf3 Bf6 24. h4 Bxh4 25. Nxh4 Qxh4 26. Rh1 Qd8 27. Rxh6 Nf6 28. Reh1 Rg7 29. g5 Ne4 30. Nxe4 dxe4 31. Qxe4 Qd5 32. Kf3 Qxa2 33. b3 Qa5 34. c4 Qf5 35. Qxf5 exf5 36. Rh8+ Kf7 37. d5 cxd5 38. cxd5 Rd8 39. Bd4 Rxd5 40. Bxg7 Kxg7 41. R8h3 Rb5 42. Ke2 Rb4 43. Re3 Kf7 44. Kf3 Ne6 45. Rh7+ Kg8 46. Rd7 Rb6 47. Rc3 Rc6 48. Rxc6 bxc6 49. Ke3 c5 50. Rxa7 Kf8 51. Rb7 Ke8 52. Ra7 Kf8 53. Kd3 Nxf4+ 54. Kc4 Ne6 55. Kd5 Nxg5 56. Kxc5 Ke8 57. b4 f4 58. b5 Ne6+ 59. Kd6 Nd4 60. b6 1-0

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.19"]
[Round "12"]
[White "De Greif, Boris"]
[Black "Fraguela Gil, Jose Miguel"]
[Result "1/2-1/2"]
[ECO "B38"]
[PlyCount "48"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. e4 d6 7. Be2 0-0 8. Be3 Nc6 9. Qd2 Bd7 10. 0-0 Nxd4 11. Bxd4 Bc6 12. f3 Nd7 13. Be3 f5 14. exf5 Rxf5 15. Rae1 Nf8 16. f4 Qa5 17. Bg4 Rf7 18. Rf2 a6 19. Ref1 b5 20. f5 b4 21. Nd5 gxf5 22. Rxf5 Bxd5 23. cxd5 Rxf5 24. Rxf5 Qxa2 1/2-1/2

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.18"]
[Round "11"]
[White "Boudy Bueno, Julio Leonardo"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E91"]
[PlyCount "79"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0-0 5. Be2 d6 6. Nf3 Bg4 7. 0-0 Nfd7 8. Be3 Nc6 9. d5 Bxf3 10. Bxf3 Na5 11. Be2 c5 12. Rc1 a6 13. f4 Qc7 14. Kh1 Rfb8 15. a3 b5 16. cxb5 Bxc3 17. Rxc3 axb5 18. b4 Nc4 19. Bc1 cxb4 20. axb4 Ra1 21. Qb3 Rba8 22. Bxc4 bxc4 23. Rxc4 Qb7 24. Qc3 Qb5 25. Rg1 Nf6 26. h3 Nd7 27. Rc8+ Rxc8 28. Qxc8+ Nf8 29. Qc3 Ra2 30. Bb2 f6 31. e5 Qe2 32. exf6 Qxb2 33. Qxb2 Rxb2 34. fxe7 Kf7 35. Re1 Ne6 36. Rxe6 Ke8 37. Rxd6 Rxb4 38. Re6 Rxf4 39. d6 Rd4 40. Kg1 1-0

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.17"]
[Round "10"]
[White "De Greif, Boris"]
[Black "Fernandez Gonzalez, Juan Carlos"]
[Result "1/2-1/2"]
[ECO "D42"]
[PlyCount "36"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3 Be7 7. Bd3 Nc6 8. 0-0 0-0 9. a3 g6 10. Qe2 Bf6 11. Nxd5 Qxd5 12. e4 Qh5 13. dxc5 Qxc5 14. Be3 Qe7 15. Rac1 Rd8 16. Rfd1 Nd4 17. Nxd4 Bxd4 18. Bxd4 Rxd4 1/2-1/2

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.14"]
[Round "9"]
[White "Rodriguez Cespedes, Amador"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C70"]
[PlyCount "63"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. c3 a6 5. Ba4 b5 6. Bb3 d5 7. d4 dxe4 8. Ng5 Nd5 9. dxe5 Be6 10. Nxe6 fxe6 11. Qg4 Qd7 12. Qxe4 Bc5 13. 0-0 0-0 14. Nd2 Rf5 15. Nf3 Raf8 16. Bc2 g6 17. Qe2 Nf4 18. Bxf4 Rxf4 19. Be4 Ne7 20. Rad1 Nd5 21. g3 R4f7 22. Bxd5 exd5 23. e6 Re7 24. exd7 Rxe2 25. Rxd5 Bd6 26. Nd4 Re7 27. d8Q Rxd8 28. Nc6 Rde8 29. Nxe7+ Rxe7 30. Rfd1 Re6 31. Kf1 Kf7 32. Re1 1-0

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.13"]
[Round "8"]
[White "De Greif, Boris"]
[Black "Cuartas, Carlos Enrique"]
[Result "1/2-1/2"]
[ECO "B06"]
[PlyCount "90"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 Nc6 2. Nc3 g6 3. g3 Bg7 4. Bg2 d6 5. Nge2 f5 6. d3 Nf6 7. Bg5 Ng4 8. exf5 Bxf5 9. h3 Nge5 10. Qd2 h5 11. Be3 Qd7 12. f4 Nf7 13. 0-0-0 Be6 14. Nd5 Bxd5 15. Bxd5 e6 16. Bf3 d5 17. g4 hxg4 18. hxg4 0-0-0 19. Ng3 Nd4 20. Bxd4 Bxd4 21. c3 Bg7 22. d4 Nd6 23. Be2 Qf7 24. Bd3 Rh6 25. Rxh6 Bxh6 26. g5 Bg7 27. Rh1 Rh8 28. Rxh8+ Bxh8 29. Qe3 Kd7 30. Qf3 b6 31. b4 Ke7 32. Kb1 Qg7 33. Qh1 c5 34. Ne2 c4 35. Bc2 Kf7 36. a4 Kg8 37. Qh3 Qf7 38. Kc1 Bg7 39. Kd1 Qe8 40. Ke1 Kf7 41. Qh1 a5 42. bxa5 bxa5 43. Kf2 Qb8 44. Qb1 Qxb1 45. Bxb1 Nc8 1/2-1/2

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.12"]
[Round "7"]
[White "Cobo Arteaga, Eldis"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "E94"]
[PlyCount "80"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. d4 0-0 6. Be2 e5 7. 0-0 Qe7 8. Bg5 Nbd7 9. Nd5 Qd8 10. dxe5 dxe5 11. Qc2 c6 12. Nxf6+ Bxf6 13. Be3 Qe7 14. c5 Rd8 15. Rfd1 Nf8 16. Rxd8 Qxd8 17. Rd1 Qe7 18. h3 Be6 19. Qa4 a6 20. Qa5 Rd8 21. Rxd8 Qxd8 22. Qxd8 Bxd8 23. a3 Nd7 24. Nd2 Bc7 25. Nc4 f6 26. Kf1 Kf7 27. Ke1 h5 28. Kd2 Ke7 29. Kc3 Bxc4 30. Kxc4 Nf8 31. h4 Ne6 32. b4 Kf7 33. a4 Ke7 34. g3 Kd7 35. Bd1 Ke7 36. b5 axb5+ 37. axb5 Ba5 38. Ba4 Kd7 39. Bd1 Ke7 40. b6 Be1 1/2-1/2

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.11"]
[Round "6"]
[White "De Greif, Boris"]
[Black "Gutierrez Herrera, Jose Antonio"]
[Result "1/2-1/2"]
[ECO "D79"]
[PlyCount "33"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 d5 6. c4 c6 7. cxd5 cxd5 8. Nc3 Nc6 9. Ne5 e6 10. Bf4 Nxe5 11. Bxe5 Bd7 12. Qb3 Bc6 13. Rac1 Qa5 14. Rfd1 Rfc8 15. e3 b5 16. a3 Ne8 17. Bf4 1/2-1/2

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.09"]
[Round "5"]
[White "Camps Galceran, Pere"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "A05"]
[PlyCount "118"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. 0-0 0-0 5. d3 Nc6 6. e4 e5 7. Nbd2 d6 8. c3 Re8 9. a4 a5 10. Nc4 Bg4 11. h3 Be6 12. Ne3 Bd7 13. Nh4 Qe7 14. Kh2 Kh8 15. Bf3 Nd8 16. Bg4 Ne6 17. Nd5 Qd8 18. Nxf6 Bxf6 19. Ng2 Bg7 20. f4 exf4 21. gxf4 Nc5 22. f5 g5 23. Be3 b6 24. Bd4 Be5+ 25. Bxe5+ dxe5 26. Bh5 Rf8 27. Rf3 f6 28. Rg3 Be8 29. Bxe8 Qxe8 30. h4 h6 31. Qe2 Kg7 32. Ne3 Nxa4 33. Nd5 Rc8 34. d4 c6 35. Nxf6 Kxf6 36. Rxa4 c5 37. dxe5+ Qxe5 38. Qh5 Rh8 39. Qg6+ Ke7 40. h5 Rcd8 41. f6+ Qxf6 42. Qxf6+ Kxf6 43. Rf3+ Ke6 44. Ra1 Rhf8 45. Raf1 Rxf3 46. Rxf3 Ke5 47. Rf5+ Ke6 48. Kg3 Rd3+ 49. Kg2 Re3 50. Rf8 Rxe4 51. Rb8 Re2+ 52. Kg3 Rxb2 53. Rh8 a4 54. Rxh6+ Kf7 55. Rh7+ Kf6 56. Rb7 Re2 57. h6 Kg6 58. Rxb6+ Kh7 59. Kg4 Rc2 1/2-1/2

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.08"]
[Round "4"]
[White "Wade, Robert Graham"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "D55"]
[PlyCount "50"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 Be7 5. e3 0-0 6. Nc3 h6 7. Bxf6 Bxf6 8. Qb3 c6 9. Rd1 Nd7 10. Be2 b6 11. e4 dxc4 12. Bxc4 b5 13. Be2 Qa5 14. 0-0 e5 15. d5 b4 16. Nb1 Bb7 17. d6 Rad8 18. Nbd2 Nb6 19. Nc4 Nxc4 20. Bxc4 Rd7 21. Rd3 c5 22. Bd5 Ba6 23. Bc4 Bb7 24. Bd5 Ba6 25. Bc4 Bb7 1/2-1/2

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.07"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Durao, Joaquim Manuel"]
[Result "1-0"]
[ECO "C26"]
[PlyCount "75"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. g3 Bc5 4. Bg2 d6 5. Nf3 Nc6 6. d3 0-0 7. 0-0 Bd7 8. h3 Nd4 9. Nxd4 Bxd4 10. Ne2 Bb6 11. Kh2 c6 12. f4 exf4 13. Nxf4 Be6 14. Bd2 Qe7 15. Bc3 Be3 16. Qf3 Bxf4 17. gxf4 Rad8 18. Rg1 Ne8 19. f5 Bc8 20. Qg3 f6 21. Bf3 d5 22. Rg2 Qc7 23. Qxc7 Nxc7 24. Rag1 Rd7 25. e5 fxe5 26. Bxe5 Ne8 27. f6 g6 28. Bg4 Rd8 29. Rf2 Kf7 30. Re1 Bxg4 31. hxg4 Nd6 32. Bxd6 Rxd6 33. Re7+ Kg8 34. Rg7+ Kh8 35. g5 Rb8 36. Re2 h6 37. Ree7 hxg5 38. Rh7+ 1-0

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.06"]
[Round "2"]
[White "Garcia, Gilberto"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "E82"]
[PlyCount "93"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0-0 5. Be3 d6 6. f3 b6 7. Qd2 c5 8. d5 a6 9. a4 e6 10. Bd3 exd5 11. cxd5 Nbd7 12. Nh3 Ne5 13. Be2 Bxh3 14. gxh3 b5 15. axb5 axb5 16. Rxa8 Qxa8 17. Nxb5 Rb8 18. 0-0 Qa2 19. b4 Qb3 20. Nxd6 Qxb4 21. Rd1 Bf8 22. Qxb4 cxb4 23. Nb5 Nxf3+ 24. Bxf3 Rxb5 25. e5 Nd7 26. Be2 Rb8 27. Bf4 g5 28. Bg3 Bc5+ 29. Kf1 Ra8 30. e6 fxe6 31. dxe6 Nb6 32. Bd6 Bxd6 33. Rxd6 Rf8+ 34. Kg2 Nc8 35. Rd7 Nb6 36. Rb7 Nd5 37. e7 Nf4+ 38. Kf3 Re8 39. Bb5 Kf7 40. Bxe8+ Kxe8 41. Kg4 Nd5 42. Kxg5 Kf7 43. Kh6 Nxe7 44. Kxh7 Kf6 45. Rxb4 Kg5 46. Rb5+ Kh4 47. Rc5 1-0

[Event "Capablanca Memorial-12 Maestros"]
[Site "Cienfuegos"]
[Date "1975.03.05"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Rodriguez Gonzales, Jesus"]
[Result "0-1"]
[ECO "E60"]
[PlyCount "87"]
[EventDate "1975.03.05"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "CUB"]
[EventCategory "4"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. b3 g6 3. Bb2 Bg7 4. c4 0-0 5. g3 c5 6. Bg2 Nc6 7. 0-0 d6 8. d4 cxd4 9. Nxd4 Bd7 10. Nc3 Rc8 11. Nd5 Nxd5 12. Nxc6 bxc6 13. Bxg7 Kxg7 14. cxd5 c5 15. Qd2 Rb8 16. h4 f6 17. e4 Rb4 18. f4 Qb6 19. Kh2 Rd4 20. Qe3 Qb4 21. Rf2 a5 22. a3 Qb5 23. Bf1 Qb7 24. a4 e6 25. Bc4 Re8 26. Qf3 exd5 27. exd5 Bf5 28. Qc3 Qa7 29. Re1 Rde4 30. Rxe4 Rxe4 31. Qd2 Qb6 32. Re2 Qb4 33. Qxb4 Rxe2+ 34. Bxe2 cxb4 35. Bc4 Be4 36. Kg1 g5 37. Kf2 gxf4 38. gxf4 Kh6 39. Ke3 Bc2 40. Kd2 Bf5 41. Be2 Be4 42. Bc4 f5 43. Ke3 Kh5 44. Kd4 0-1

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "2"]
[White "Agudelo, Antonio"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "A37"]
[PlyCount "61"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 c5 2. c4 g6 3. g3 Bg7 4. Bg2 Nc6 5. Nc3 e6 6. 0-0 Nge7 7. d3 d5 8. cxd5 exd5 9. Bd2 0-0 10. Qc1 b6 11. Bh6 Bb7 12. Bxg7 Kxg7 13. a3 d4 14. Ne4 Nd5 15. Rb1 Qe7 16. Re1 Rad8 17. h4 h6 18. g4 f5 19. gxf5 Rxf5 20. Ng3 Rdf8 21. Nxf5+ Rxf5 22. e4 dxe3 23. fxe3 Ne5 24. Nxe5 Rxe5 25. e4 Qxh4 26. Rf1 Rg5 27. Rf2 Nc7 28. Qc3+ Kg8 29. Qf6 Rxg2+ 30. Kxg2 Qxf6 31. Rxf6 1-0

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "8"]
[White "Alzate, Javier"]
[Black "De Greif, Boris"]
[Result "1/2-1/2"]
[ECO "C26"]
[PlyCount "62"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 Nf6 2. d3 e5 3. Nc3 d5 4. Bg5 d4 5. Nd5 Nbd7 6. Nf3 c6 7. Nxf6+ Nxf6 8. Qd2 Bd6 9. Be2 Qe7 10. 0-0 h6 11. Bh4 g5 12. Bg3 Nd7 13. c3 c5 14. a3 Nf8 15. b4 dxc3 16. Qxc3 cxb4 17. axb4 Ng6 18. d4 Bxb4 19. Bb5+ Kf8 20. Qb2 Bd6 21. dxe5 Bc7 22. Rac1 Be6 23. Bc4 Bb6 24. Nd4 Bxd4 25. Qxd4 Kg7 26. f4 gxf4 27. Bxf4 Nxf4 28. Rxf4 Rac8 29. Rc3 Rxc4 30. Rxc4 Rd8 31. Qc3 Rd1+ 1/2-1/2

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "4"]
[White "Castro, German"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "B06"]
[PlyCount "104"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 g6 2. Nf3 Bg7 3. Bc4 c6 4. a4 d5 5. exd5 cxd5 6. Bb5+ Nc6 7. d4 Bg4 8. c3 Nf6 9. Nbd2 0-0 10. Bxc6 bxc6 11. h3 Bc8 12. 0-0 Nd7 13. Re1 Re8 14. Nb3 Qb6 15. Bf4 Ba6 16. Qc2 Rac8 17. Ra3 Bf8 18. Nc1 e5 19. Rb3 Qa5 20. dxe5 Qxa4 21. Qd2 Bc4 22. e6 Rxe6 23. Rxe6 fxe6 24. Qe3 d4 25. Nxd4 Bxb3 26. Ndxb3 e5 27. Bg3 Re8 28. Qd3 Nf6 29. c4 Qb4 30. Kh2 Bg7 31. Na2 Qe7 32. Qe3 Rb8 33. Na5 Rxb2 34. Nxc6 Qd6 35. Bxe5 Ng4+ 36. hxg4 Bxe5+ 37. Nxe5 Rxa2 38. f4 g5 39. c5 Qh6+ 40. Kg3 gxf4+ 41. Qxf4 Ra3+ 42. Nf3 Qxf4+ 43. Kxf4 Rc3 44. g5 Rxc5 45. Ke4 a5 46. Kd4 Rc2 47. g4 a4 48. Kd3 Rc7 49. Nd2 a3 50. Nb3 a2 51. Kd2 Rb7 52. Kc2 Rxb3 0-1

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "12"]
[White "Cuartas, Carlos Enrique"]
[Black "De Greif, Boris"]
[Result "1-0"]
[ECO "C44"]
[PlyCount "77"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 d5 4. Bb5 dxe4 5. Nxe5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bg5 Be7 9. Nxc6 bxc6 10. Bxf6 Bxf6 11. Nxe4 Qxd4 12. Qxd4 Bxd4 13. 0-0-0 0-0-0 14. c3 Be5 15. g3 Rxd1+ 16. Kxd1 f5 17. Ng5 Bf6 18. Nf3 Re8 19. Re1 Rxe1+ 20. Nxe1 Kd7 21. Kd2 Kd6 22. Kd3 Kc5 23. Nc2 g6 24. a4 Kd5 25. Ne3+ Ke6 26. f4 Be7 27. Kc4 Kd7 28. Nc2 Bf8 29. Nd4 Bg7 30. Nf3 Kd6 31. b4 Bf6 32. a5 Kd7 33. a6 Kd6 34. Ng5 h6 35. Nf3 Kd7 36. Nh4 Bxh4 37. gxh4 Kd6 38. h3 c5 39. b5 1-0

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "6"]
[White "Cuellar Gacharna, Miguel"]
[Black "De Greif, Boris"]
[Result "0-1"]
[ECO "A81"]
[PlyCount "122"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 f5 2. b3 Nf6 3. Bb2 g6 4. c4 Bg7 5. g3 0-0 6. Bg2 c5 7. 0-0 Nc6 8. e3 d6 9. d4 Ne4 10. Nc3 e6 11. Rc1 Qe7 12. d5 Nb4 13. dxe6 Bxe6 14. Qe2 Rad8 15. Rfd1 Nxc3 16. Bxc3 Bxc3 17. Rxc3 d5 18. a3 Nc6 19. cxd5 Rxd5 20. Rdc1 Rfd8 21. h4 h6 22. R3c2 Qd6 23. Ne1 Rd1 24. Rxc5 Rxc1 25. Rxc1 Qxa3 26. Rb1 Qb4 27. Qb2 Qe7 28. b4 Bd5 29. Bxd5+ Rxd5 30. Qa2 Qd7 31. b5 Ne7 32. Qxa7 Rxb5 33. Qa4 Rd5 34. Qb3 Kf8 35. Qxb7 Qxb7 36. Rxb7 Rd1 37. Kf1 Nd5 38. Rb3 Rc1 39. Rb2 Nc3 40. Rb6 Kg7 41. Rc6 Na2 42. Rxc1 Nxc1 43. Nf3 Kf6 44. Ke1 Nd3+ 45. Ke2 Nc5 46. Nd2 Ke5 47. f3 Kd5 48. g4 fxg4 49. fxg4 Ke5 50. Nc4+ Kd5 51. Nb2 g5 52. h5 Nd7 53. Nd3 Ke4 54. Nf2+ Kd5 55. Kd3 Nc5+ 56. Kc3 Ne4+ 57. Nxe4 Kxe4 58. Kd2 Kf3 59. Kd3 Kxg4 60. Kd4 Kf3 61. e4 g4 0-1

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "13"]
[White "De Greif, Boris"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "0-1"]
[ECO "A00"]
[PlyCount "120"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. g3 f5 2. Bg2 Nf6 3. b3 e6 4. Bb2 Be7 5. Nf3 a5 6. a4 0-0 7. 0-0 Qe8 8. e3 d6 9. d4 Nc6 10. Nc3 Nd8 11. Nb5 Qd7 12. Qe2 Nf7 13. Rfd1 c6 14. Na3 Qc7 15. Rac1 Bd7 16. c4 Rad8 17. Qe1 b6 18. d5 e5 19. Nd2 Rde8 20. f4 Ng4 21. h3 Nf6 22. Kh2 exf4 23. gxf4 Nh5 24. Qf2 Bf6 25. Bxf6 Nxf6 26. Rg1 Re7 27. Bf3 Rfe8 28. Qg2 Nd8 29. dxc6 Bxc6 30. Nb5 Qd7 31. Bxc6 Nxc6 32. Nf1 Re6 33. Rd1 R8e7 34. Nc3 Nb4 35. Qd2 Qe8 36. Ng3 Rxe3 37. Rg2 Rd3 38. Qc1 Ree3 39. Rxd3 Nxd3 40. Qf1 Ne1 41. Re2 Nf3+ 42. Kg2 Nh4+ 43. Kh2 Nf3+ 44. Kg2 Nd4 45. Rxe3 Qxe3 46. Nb5 Ne6 47. Kh2 g6 48. Qe2 Qxe2+ 49. Nxe2 Ne4 50. Nbd4 N6c5 51. Kg2 Kf7 52. h4 Ke7 53. Nc1 d5 54. cxd5 Kd6 55. Kf3 Kxd5 56. Ke3 Nd2 57. Nxf5 gxf5 58. Kxd2 Ke4 59. Kc3 Kxf4 60. Kd4 Kf3 0-1

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "1/2-1/2"]
[ECO "C47"]
[PlyCount "111"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. Nf3 Nc6 2. g3 Nf6 3. Bg2 e5 4. d3 Bc5 5. e4 d5 6. exd5 Nxd5 7. 0-0 0-0 8. Nc3 Bg4 9. h3 Nxc3 10. bxc3 Bh5 11. Qe1 Re8 12. Qe4 Qd7 13. Nh4 Bb6 14. g4 Bg6 15. Nxg6 hxg6 16. Bg5 Rab8 17. Rab1 Qe6 18. Qd5 Qxd5 19. Bxd5 Ne7 20. Bxe7 Rxe7 21. Kg2 c6 22. Bb3 Ba5 23. f4 Bxc3 24. fxe5 Rf8 25. e6 fxe6 26. Rxf8+ Kxf8 27. Rf1+ Ke8 28. Rf4 g5 29. Re4 Kd7 30. Rc4 Bf6 31. a4 Kd6 32. Re4 c5 33. Re1 Be5 34. Rf1 Bf6 35. Re1 Be5 36. Rf1 a6 37. Bc4 Bf4 38. h4 Kc6 39. hxg5 Bxg5 40. Re1 Kd6 41. Rb1 Bd2 42. Rh1 Ke5 43. Rh8 Kd4 44. Kf3 Ba5 45. Rf8 Bc7 46. g5 Kc3 47. Bb3 b5 48. axb5 axb5 49. g6 c4 50. dxc4 bxc4 51. Ba4 Kb4 52. Re8 Rxe8 53. Bxe8 Kc3 54. Bb5 Kd4 55. Bd7 Kd5 56. Bc8 1/2-1/2

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Garcia, Luis E"]
[Result "1-0"]
[ECO "A01"]
[PlyCount "107"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. b3 Nf6 2. Bb2 e6 3. e3 c5 4. f4 Be7 5. Nf3 Qc7 6. Bd3 Nc6 7. 0-0 b6 8. Nc3 Bb7 9. a3 a6 10. Ne2 b5 11. Rc1 Qb6 12. Rb1 Na5 13. Nc1 Rc8 14. b4 cxb4 15. axb4 Nc6 16. Bxf6 gxf6 17. c3 f5 18. Nb3 d6 19. Qe2 Bf6 20. Nbd4 Nxd4 21. exd4 Kf8 22. Ng5 Qc7 23. Rbe1 Qd7 24. Qh5 h6 25. Nf3 Qd8 26. Re3 Bg7 27. Nh4 Qf6 28. Rg3 Bd5 29. Bxf5 exf5 30. Nxf5 Be4 31. Nxg7 Rg8 32. Qe2 Bb7 33. Nh5 Qf5 34. Rxg8+ Kxg8 35. Qg4+ Qg6 36. f5 Qg5 37. h4 Qxg4 38. Nf6+ Kf8 39. Nxg4 Kg7 40. Re1 h5 41. Ne3 Kf6 42. Rf1 Rg8 43. Rf4 Rh8 44. Kh2 a5 45. bxa5 Ra8 46. Nf1 Kg7 47. Ng3 Kh6 48. f6 Kg6 49. Nf5 Ra6 50. Ne7+ Kh6 51. d5 Rxa5 52. Rb4 Ba6 53. g4 hxg4 54. Rxg4 1-0

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Gutierrez Herrera, Jose Antonio"]
[Result "1-0"]
[ECO "C02"]
[PlyCount "113"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 c4 7. g3 f6 8. exf6 gxf6 9. Nh4 Bd7 10. Qh5+ Kd8 11. Bh3 Kc7 12. 0-0 Bd6 13. Nd2 Nge7 14. Rb1 Rag8 15. Qd1 Ng6 16. Ndf3 Kb8 17. Re1 Nxh4 18. Nxh4 f5 19. Qf3 Qc7 20. Ng2 h5 21. Bf4 h4 22. Bxd6 Qxd6 23. Qf4 Qxf4 24. Nxf4 hxg3 25. fxg3 Rh6 26. Bg2 Kc7 27. Re3 Kd6 28. Rbe1 a5 29. h4 b5 30. Kf2 b4 31. axb4 axb4 32. Ra1 Rb8 33. Bf3 Rb5 34. Ra8 e5 35. dxe5+ Nxe5 36. Ra6+ Bc6 37. Ne2 bxc3 38. bxc3 Rb2 39. Ke1 Nxf3+ 40. Rxf3 Re6 41. Rf2 d4 42. cxd4 c3 43. Kd1 Rd2+ 44. Ke1 Kd7 45. Ra5 Rb2 46. Kd1 Rexe2 47. Rxe2 Bf3 48. Rae5 Rxe2 49. Rxe2 Kd6 50. Ke1 Kd5 51. Re3 Bg4 52. Rxc3 Kxd4 53. Ra3 Ke5 54. Ra4 Bh5 55. Kf2 Kf6 56. Ke3 Kg6 57. Ra6+ 1-0

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "9"]
[White "De Greif, Boris"]
[Black "Idrovo, Franklin"]
[Result "1/2-1/2"]
[ECO "E12"]
[PlyCount "164"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. e3 b6 4. c4 Bb7 5. a3 Be7 6. Nc3 d5 7. cxd5 exd5 8. Bb5+ c6 9. Bd3 0-0 10. 0-0 Nbd7 11. b4 a5 12. Rb1 axb4 13. axb4 Bd6 14. e4 dxe4 15. Nxe4 Nxe4 16. Bxe4 Nf6 17. Bg5 h6 18. Bxf6 Qxf6 19. b5 Ra2 20. bxc6 Bc8 21. Rxb6 Bg4 22. h3 Bh5 23. Rb5 Bxf3 24. Qxf3 Qxd4 25. Rd5 Qb4 26. Rb1 Rb2 27. Rdd1 Bc7 28. Rxb2 Qxb2 29. g3 Qe5 30. Bd5 Bb6 31. Kg2 Bc7 32. Rb1 Kh8 33. Qe4 Qd6 34. Rb3 g6 35. Rf3 Kg7 36. Qd4+ Qe5 37. Qxe5+ Bxe5 38. h4 h5 39. Kf1 f6 40. Ra3 Rc8 41. f4 Bd6 42. Ra7+ Rc7 43. Ra8 Re7 44. Rg8+ Kh7 45. Rd8 Bc7 46. Rc8 Bd6 47. Rd8 Bc7 48. Ra8 Bd6 49. Ra4 Kg7 50. Bf3 Kh6 51. Ra8 Kg7 52. Kg2 Kh7 53. Ra5 Kh6 54. Kf2 Bb4 55. Rb5 Bd6 56. Be2 Rc7 57. Bf3 Re7 58. Ra5 Bc7 59. Ra8 Bd6 60. Ra6 Kg7 61. Kg2 Kh7 62. Ra2 Kg7 63. Bd5 Bc5 64. Rb2 Kh7 65. Rc2 Bb6 66. Kf1 Kg7 67. Rc4 Bc7 68. Ra4 Bd6 69. Be4 Kh6 70. Bd3 Kg7 71. Rd4 Bc7 72. Ba6 Bb6 73. Rc4 Bc7 74. Rd4 Bb6 75. Rd3 Rc7 76. Bb7 Bc5 77. Ke2 g5 78. Rd5 Be7 79. f5 Kf7 80. Kf3 Bb4 81. Ke4 Be1 82. Rd3 Bf2 1/2-1/2

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "1"]
[White "De Greif, Boris"]
[Black "Minaya Molano, Juan M"]
[Result "0-1"]
[ECO "A42"]
[PlyCount "78"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. c4 g6 2. Nc3 Bg7 3. e4 d6 4. d4 Nd7 5. Nf3 e5 6. Be2 c6 7. 0-0 Nh6 8. dxe5 dxe5 9. Qd6 Qe7 10. Qxe7+ Kxe7 11. b3 f6 12. Ba3+ Ke8 13. Rad1 Bf8 14. Bxf8 Nxf8 15. Rd2 Ne6 16. Rfd1 Ke7 17. Na4 Nf7 18. c5 Rd8 19. Bc4 Rxd2 20. Rxd2 Nf4 21. Bxf7 Kxf7 22. g3 Ne6 23. b4 Ke7 24. h4 h5 25. Kg2 Rb8 26. Ne1 b5 27. cxb6 axb6 28. Nc2 Bd7 29. Nc3 b5 30. f3 Ra8 31. Kf2 Nd8 32. f4 Be6 33. fxe5 fxe5 34. Ne1 Ra3 35. Rc2 Nf7 36. Nd3 Nd6 37. Nc5 Bg4 38. Kg1 Nc4 39. Kf2 Ra8 0-1

[Event "COL-ch"]
[Site "Bogota"]
[Date "1975.??.??"]
[Round "14"]
[White "De Greif, Boris"]
[Black "Munoz, Francisco"]
[Result "1/2-1/2"]
[ECO "A43"]
[PlyCount "46"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "COL"]
[EventCategory "2"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nf3 c5 4. d5 d6 5. Nc3 a6 6. a4 b6 7. Be2 Nf6 8. 0-0 Nbd7 9. h3 0-0 10. Nd2 Ne8 11. Nc4 Rb8 12. Bf4 Ne5 13. Qd2 f5 14. exf5 gxf5 15. Rfe1 b5 16. axb5 axb5 17. Nxe5 dxe5 18. Bg5 Nd6 19. Ra7 b4 20. Na4 Ne4 21. Qe3 Rb7 22. Rxb7 Bxb7 23. Nxc5 Nxg5 1/2-1/2

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "5"]
[White "De Greif, Boris"]
[Black "Rodriguez Gonzales, Jesus"]
[Result "1/2-1/2"]
[ECO "B15"]
[PlyCount "35"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 g6 2. e4 Bg7 3. Nf3 c6 4. Nc3 d5 5. h3 dxe4 6. Nxe4 Nd7 7. Bc4 Ngf6 8. Nxf6+ Nxf6 9. 0-0 0-0 10. Re1 Bf5 11. a4 e6 12. c3 Nd5 13. Bg5 Qc7 14. Qd2 Rfe8 15. Bh6 Bh8 16. Bxd5 cxd5 17. Qf4 Qxf4 18. Bxf4 1/2-1/2

[Event "Quito"]
[Site "Quito"]
[Date "1975.??.??"]
[Round "3"]
[White "De Greif, Boris"]
[Black "Rossetto, Hector"]
[Result "1/2-1/2"]
[ECO "C05"]
[PlyCount "90"]
[EventDate "1975.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "ECU"]
[EventCategory "3"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. Bd3 c5 5. e5 Ng8 6. c3 Qb6 7. Ne2 Bd7 8. 0-0 Nc6 9. Nf3 a6 10. dxc5 Bxc5 11. b4 Be7 12. Re1 h5 13. Rb1 Qc7 14. Ned4 g6 15. h4 Nh6 16. Bxh6 Rxh6 17. Qd2 Rh8 18. g3 Kf8 19. Qf4 Kg7 20. Ng5 Raf8 21. Qxf7+ Rxf7 22. Ngxe6+ Bxe6 23. Nxe6+ Kh6 24. Nxc7 d4 25. Nd5 dxc3 26. e6 Rg7 27. Nxc3 Bxb4 28. Rec1 Ba3 29. Re1 Bb4 30. Rbc1 Re8 31. Re4 Rd8 32. Bc4 Rd2 33. Nd5 Bc5 34. Re2 Ba3 35. Rxd2 Bxc1 36. Rd1 Ba3 37. f4 Ne7 38. Nxe7 Rxe7 39. Rd7 Kg7 40. Rxe7+ Bxe7 41. a4 Kf6 42. Kg2 b5 43. axb5 axb5 44. Bb3 b4 45. Kf3 Bc5 1/2-1/2

