[Event "Olympiad-29"]
[Site "Novi Sad"]
[Date "1990.11.29"]
[Round "11"]
[White "Jones, Iolo Cerredig"]
[Black "Araya Numana, Carlos"]
[Result "1/2-1/2"]
[ECO "A07"]
[WhiteElo "2250"]
[PlyCount "74"]
[EventDate "1990.11.17"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "YUG"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "Wales"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "WLS"]
[BlackTeamCountry "CRI"]

1. Nf3 d5 2. g3 e6 3. Bg2 Nf6 4. 0-0 Be7 5. d3 0-0 6. Nbd2 Nbd7 7. e4 dxe4 8. dxe4 c6 9. Qe2 e5 10. b3 Qc7 11. Bb2 Re8 12. Rfd1 Bc5 13. h3 b5 14. a4 a6 15. Ne1 Bb7 16. Nd3 Ba7 17. c4 bxa4 18. Rxa4 c5 19. Nb1 Rab8 20. Ra3 Nf8 21. Nc3 N6d7 22. Nd5 Qc6 23. h4 f6 24. Bh3 Ne6 25. Qg4 Bc8 26. Qh5 Ndf8 27. Rda1 Bb6 28. Kh2 Bd8 29. Bc3 g6 30. Qf3 Kg7 31. Nc1 Ra8 32. Ne2 Nd4 33. Bxd4 exd4 34. Bxc8 Qxc8 35. Nc1 Qe6 36. Nd3 Nd7 37. Re1 Ne5 1/2-1/2

[Event "Olympiad-29"]
[Site "Novi Sad"]
[Date "1990.11.27"]
[Round "10"]
[White "Araya Numana, Carlos"]
[Black "Aryanejad, Hossein"]
[Result "1/2-1/2"]
[ECO "E74"]
[PlyCount "73"]
[EventDate "1990.11.17"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "YUG"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "Costa Rica"]
[BlackTeam "Iran"]
[WhiteTeamCountry "CRI"]
[BlackTeamCountry "IRI"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Bg5 c5 7. d5 h6 8. Be3 Na6 9. h3 Nc7 10. Qd2 Kh7 11. Nf3 Bd7 12. 0-0 a6 13. a4 b6 14. Bd3 Ng8 15. Bf4 f6 16. Qc2 Be8 17. Bh2 Rb8 18. Ra2 b5 19. axb5 axb5 20. b3 Kh8 21. Nh4 b4 22. Ne2 e5 23. g3 Kh7 24. Kg2 Bd7 25. f4 Ne7 26. f5 Qc8 27. Rfa1 g5 28. Nf3 Ra8 29. Rxa8 Nxa8 30. Ra5 Nb6 31. Qa2 Qb8 32. Ne1 Nec8 33. Ra6 Rf7 34. Qa5 Bf8 35. Bg1 Be7 36. Qa1 Be8 37. Ra2 1/2-1/2

[Event "Olympiad-29"]
[Site "Novi Sad"]
[Date "1990.11.21"]
[Round "5"]
[White "Araya Numana, Carlos"]
[Black "Pacheco Asmat, Jorge"]
[Result "0-1"]
[ECO "E91"]
[PlyCount "70"]
[EventDate "1990.11.17"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "YUG"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "Costa Rica"]
[BlackTeam "Peru"]
[WhiteTeamCountry "CRI"]
[BlackTeamCountry "PER"]

1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 d6 5. e4 Bg7 6. Be2 0-0 7. Nf3 e6 8. Qc2 exd5 9. Nxd5 Nc6 10. Nxf6+ Qxf6 11. a3 Bg4 12. 0-0 Rab8 13. Rb1 Rfe8 14. Rd1 Bxf3 15. Bxf3 Nd4 16. Qd3 b6 17. Bg4 h5 18. Bh3 g5 19. Bf5 b5 20. cxb5 Rxb5 21. b4 cxb4 22. a4 Rxf5 23. exf5 Ne2+ 24. Kf1 Nc3 25. Bb2 d5 26. Re1 Rd8 27. a5 d4 28. Ra1 a6 29. h3 g4 30. hxg4 hxg4 31. Kg1 Bf8 32. Rf1 Bd6 33. f4 Bc5 34. g3 Rd5 35. Bxc3 dxc3+ 0-1

[Event "Olympiad-29"]
[Site "Novi Sad"]
[Date "1990.11.20"]
[Round "4"]
[White "Araya Numana, Carlos"]
[Black "Ibrahima, Konate"]
[Result "1-0"]
[ECO "E67"]
[BlackElo "2205"]
[PlyCount "103"]
[EventDate "1990.11.17"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "YUG"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "Costa Rica"]
[BlackTeam "Mali"]
[WhiteTeamCountry "CRI"]
[BlackTeamCountry "MLI"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 0-0 5. Nf3 d6 6. Nc3 a6 7. 0-0 Nbd7 8. Qc2 c6 9. b3 Re8 10. Bb2 e5 11. dxe5 dxe5 12. e4 Qc7 13. Rad1 Nc5 14. b4 Ne6 15. Na4 Nd7 16. c5 a5 17. a3 axb4 18. axb4 b6 19. Ra1 Bb7 20. Rfd1 bxc5 21. bxc5 Ba6 22. Bf1 Bb5 23. Rxd7 Bxa4 24. Qd2 Qa5 25. Ba3 Qxd2 26. Nxd2 Bc2 27. Bc4 Red8 28. Bxe6 fxe6 29. Rxd8+ Rxd8 30. Nc4 Bxe4 31. Bb2 Bf3 32. Bxe5 Rd1+ 33. Rxd1 Bxd1 34. Bxg7 Kxg7 35. Ne5 Ba4 36. f4 Kf6 37. Kf2 g5 38. Kf3 gxf4 39. Kxf4 h5 40. Nd7+ Ke7 41. Nb6 Bb3 42. Ke5 Kf7 43. Nc8 Bd5 44. Kd6 Kf6 45. Ne7 Bg2 46. Nxc6 Kf5 47. Ne5 Bd5 48. c6 Bxc6 49. Nxc6 Kg4 50. Kxe6 Kh3 51. Kf5 Kxh2 52. Kf4 1-0

[Event "Olympiad-29"]
[Site "Novi Sad"]
[Date "1990.11.19"]
[Round "3"]
[White "Araya Numana, Carlos"]
[Black "Savva, Panikos"]
[Result "1-0"]
[ECO "D79"]
[PlyCount "161"]
[EventDate "1990.11.17"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "YUG"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "Costa Rica"]
[BlackTeam "Cyprus"]
[WhiteTeamCountry "CRI"]
[BlackTeamCountry "CYP"]

1. d4 Nf6 2. c4 g6 3. g3 d5 4. Nf3 Bg7 5. Bg2 0-0 6. 0-0 c6 7. cxd5 cxd5 8. Nc3 Nc6 9. Bf4 a6 10. Rc1 Ne4 11. Ne5 Nxc3 12. Rxc3 Qb6 13. Bxd5 Qxd4 14. Bxc6 Bxe5 15. Bxe5 Qxe5 16. Bg2 Rb8 17. e3 Be6 18. Qa4 Rfd8 19. a3 Rd2 20. Qb4 b5 21. Qxe7 Rxb2 22. Rc5 Qg7 23. Qa7 Qf8 24. Rfc1 Bc4 25. Bf1 Bxf1 26. Kxf1 Rd8 27. Qb7 Qd6 28. Rc8 Rxc8 29. Qxc8+ Kg7 30. Qc3+ Qf6 31. Qxf6+ Kxf6 32. Rc6+ Kg7 33. Rxa6 Ra2 34. Rb6 Rxa3 35. Rxb5 Ra2 36. Kg2 h5 37. Rb7 Rc2 38. h3 Ra2 39. g4 hxg4 40. hxg4 g5 41. Kf3 Rc2 42. Kg3 Kg6 43. f4 gxf4+ 44. exf4 Rc1 45. Rb6+ Kg7 46. Kh4 Rc4 47. Kg5 Rc5+ 48. f5 Rc7 49. f6+ Kh7 50. Rb5 Ra7 51. Kf5 Rc7 52. g5 Ra7 53. Rd5 Ra1 54. g6+ fxg6+ 55. Ke6 Kh6 56. Re5 Ra6+ 57. Kf7 g5 58. Re6 Ra1 59. Kf8 Ra8+ 60. Re8 Ra5 61. Kg8 g4 62. f7 Rg5+ 63. Kh8 Rf5 64. Re6+ Kh5 65. Re5 Rxe5 66. f8Q Ra5 67. Qe8+ Kh6 68. Qe3+ Rg5 69. Qg3 Kg6 70. Kg8 Kh6+ 71. Kf7 Rg7+ 72. Kf6 Rg6+ 73. Kf5 Rg5+ 74. Kf4 Rg6 75. Qh4+ Kg7 76. Qe7+ Kh6 77. Kg3 Rg5 78. Kf4 Rg6 79. Kf5 g3 80. Qe8 Rg5+ 81. Kf6 1-0

[Event "Olympiad-29"]
[Site "Novi Sad"]
[Date "1990.11.18"]
[Round "2"]
[White "Kosic, Dragan"]
[Black "Araya Numana, Carlos"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "2480"]
[PlyCount "79"]
[EventDate "1990.11.17"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "YUG"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "Yugoslavia III"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "YUG"]
[BlackTeamCountry "CRI"]

1. d4 d5 2. Bf4 Nf6 3. e3 e6 4. Nd2 c5 5. c3 Nc6 6. Ngf3 Be7 7. h3 0-0 8. Bd3 c4 9. Bc2 b5 10. a3 Bb7 11. e4 dxe4 12. Nxe4 Nxe4 13. Bxe4 Bd6 14. Be3 Qc7 15. Ng5 h6 16. h4 Nd8 17. Qh5 Bxe4 18. Nxe4 Bf4 19. Qf3 Bxe3 20. fxe3 Qc6 21. Nc5 Qxf3 22. gxf3 Nc6 23. Kd2 Rfd8 24. f4 Rac8 25. Ke2 h5 26. Rhg1 Kh7 27. Rg5 Rd5 28. Rag1 Rxg5 29. Rxg5 f6 30. Rg1 Nd8 31. e4 Rc7 32. a4 bxa4 33. Ra1 e5 34. fxe5 fxe5 35. Rxa4 exd4 36. cxd4 Kh6 37. Rxc4 Ne6 38. b4 g5 39. hxg5+ Nxg5 40. d5 1-0

[Event "Olympiad-29"]
[Site "Novi Sad"]
[Date "1990.11.17"]
[Round "1"]
[White "Saleh, Nabil"]
[Black "Araya Numana, Carlos"]
[Result "1-0"]
[ECO "D36"]
[WhiteElo "2205"]
[PlyCount "87"]
[EventDate "1990.11.17"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "YUG"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "United Arab Emirates"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "UAE"]
[BlackTeamCountry "CRI"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. Nf3 c6 6. e3 Be7 7. cxd5 exd5 8. Qc2 0-0 9. Bd3 h6 10. Bh4 Re8 11. Rb1 a5 12. a3 Ne4 13. Bxe7 Qxe7 14. 0-0 Ndf6 15. b4 axb4 16. axb4 Nxc3 17. Qxc3 Ne4 18. Qb2 b5 19. Rfc1 Bb7 20. Bxe4 Qxe4 21. Nd2 Qe7 22. Rc5 Ra4 23. Qc3 Rea8 24. Nb3 Ra3 25. Qe1 R8a6 26. Na5 Ba8 27. Qc1 Qe4 28. Qxa3 Qxb1+ 29. Rc1 Qg6 30. Qc3 Qd6 31. f3 f5 32. Qb3 Kf8 33. Rc5 Ra7 34. Qc2 Qe6 35. Kf2 g6 36. Rc3 Ra6 37. Nb3 Qd6 38. Nc5 Ra7 39. g3 Re7 40. Ra3 Qb8 41. Qa2 Bb7 42. Ra7 Kg7 43. Qa5 f4 44. Qb6 1-0

[Event "Olympiad-27"]
[Site "Dubai"]
[Date "1986.12.01"]
[Round "14"]
[White "Araya Numana, Carlos"]
[Black "West, Guy"]
[Result "0-1"]
[ECO "A30"]
[BlackElo "2255"]
[PlyCount "72"]
[EventDate "1986.11.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "UAE"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]
[WhiteTeam "Costa Rica"]
[BlackTeam "Australia"]
[WhiteTeamCountry "CRI"]
[BlackTeamCountry "AUS"]

1. c4 Nf6 2. Nf3 c5 3. g3 b6 4. Bg2 Bb7 5. 0-0 g6 6. b3 Bg7 7. Bb2 0-0 8. Nc3 Na6 9. d4 e6 10. Qd2 Qe7 11. Rfd1 Rfd8 12. d5 d6 13. Ne1 e5 14. e4 Nc7 15. a3 Kh8 16. Nc2 Rg8 17. Ne3 Bc8 18. Qd3 Ng4 19. Nxg4 Bxg4 20. f3 Bd7 21. Rf1 f5 22. Rf2 f4 23. g4 h5 24. h3 a5 25. a4 hxg4 26. hxg4 Bf6 27. Bh1 Kg7 28. Qf1 Rh8 29. Rh2 Bh4 30. Ne2 g5 31. Bg2 Rh6 32. Rh3 Ne8 33. Bc1 Nf6 34. Ra2 Rah8 35. Rc2 Kf7 36. Rh1 Ke8 0-1

[Event "Olympiad-27"]
[Site "Dubai"]
[Date "1986.11.29"]
[Round "13"]
[White "Acosta, Alejandro"]
[Black "Araya Numana, Carlos"]
[Result "1-0"]
[ECO "C84"]
[WhiteElo "2325"]
[PlyCount "63"]
[EventDate "1986.11.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "UAE"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]
[WhiteTeam "Columbia"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "CRI"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d4 exd4 6. 0-0 Be7 7. Re1 0-0 8. e5 Nd5 9. Bb3 Nb6 10. Nxd4 Nxd4 11. Qxd4 d5 12. exd6 Bxd6 13. Bf4 Bxf4 14. Qxf4 Be6 15. Bxe6 fxe6 16. Qe4 Rf6 17. Nc3 c6 18. Rad1 Nd5 19. Qe5 Qb8 20. Qxb8+ Rxb8 21. Ne4 Rg6 22. Nc5 Nf4 23. g3 Nh3+ 24. Kg2 Nf4+ 25. Kf1 Nd5 26. c4 Nb6 27. b3 a5 28. Nxe6 Rf6 29. Rd8+ Rxd8 30. Nxd8 Rf8 31. Nxb7 a4 32. Re6 1-0

[Event "Olympiad-27"]
[Site "Dubai"]
[Date "1986.11.25"]
[Round "10"]
[White "Araya Numana, Carlos"]
[Black "Francisco, Joao"]
[Result "1/2-1/2"]
[ECO "A37"]
[PlyCount "54"]
[EventDate "1986.11.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "UAE"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]
[WhiteTeam "Costa Rica"]
[BlackTeam "Angola"]
[WhiteTeamCountry "CRI"]
[BlackTeamCountry "ANG"]

1. c4 c5 2. Nf3 e6 3. g3 g6 4. Bg2 Bg7 5. 0-0 Nc6 6. Nc3 Nge7 7. b3 0-0 8. Bb2 d6 9. d3 e5 10. Qd2 h6 11. Rac1 Kh7 12. Ne1 h5 13. e3 Be6 14. Nd5 Bxd5 15. cxd5 Nb4 16. Ba1 Nbxd5 17. d4 exd4 18. exd4 Bh6 19. f4 cxd4 20. Bxd4 Qd7 21. Ba1 Qb5 22. Nc2 Rad8 23. Na3 Qb4 24. Qxb4 Nxb4 25. Bxb7 Nxa2 26. Rc7 Nf5 27. Be4 Bg7 1/2-1/2

[Event "Olympiad-27"]
[Site "Dubai"]
[Date "1986.11.22"]
[Round "7"]
[White "Majdoubi, N."]
[Black "Araya Numana, Carlos"]
[Result "0-1"]
[ECO "E01"]
[PlyCount "76"]
[EventDate "1986.11.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "UAE"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]
[WhiteTeam "Morocco"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "MAR"]
[BlackTeamCountry "CRI"]

1. d4 d5 2. c4 e6 3. g3 Nf6 4. Bg2 Nbd7 5. Nf3 c6 6. cxd5 exd5 7. 0-0 Ne4 8. Nc3 Ndf6 9. Ne5 Be7 10. Bf4 0-0 11. a3 Bf5 12. f3 Nd6 13. g4 Be6 14. Na4 Nd7 15. Nxd7 Qxd7 16. Nc5 Qc8 17. b3 f5 18. g5 Nf7 19. Qc1 b6 20. Nd3 c5 21. Qd2 c4 22. Rfc1 Qd8 23. Ne5 Nxe5 24. Bxe5 Rc8 25. f4 b5 26. b4 Qb6 27. h4 Ra8 28. Qc3 a5 29. Rcb1 axb4 30. axb4 Qb7 31. e3 Rxa1 32. Rxa1 Ra8 33. Ra3 Qc6 34. Rxa8+ Qxa8 35. Bf3 Qa4 36. Kf1 Bxb4 37. Qc1 Qa2 38. Be2 Bd2 0-1

[Event "Olympiad-27"]
[Site "Dubai"]
[Date "1986.11.21"]
[Round "6"]
[White "Araya Numana, Carlos"]
[Black "Carton, Patrick"]
[Result "1/2-1/2"]
[ECO "A30"]
[BlackElo "2295"]
[PlyCount "92"]
[EventDate "1986.11.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "UAE"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]
[WhiteTeam "Costa Rica"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "CRI"]
[BlackTeamCountry "IRL"]

1. c4 Nf6 2. Nf3 c5 3. g3 b6 4. Bg2 Bb7 5. 0-0 g6 6. d4 cxd4 7. Nxd4 Bxg2 8. Kxg2 Bg7 9. Nc3 Qc8 10. Qd3 Nc6 11. Nxc6 Qxc6+ 12. f3 Rc8 13. b3 d5 14. Nxd5 Nxd5 15. cxd5 Qc2 16. Qxc2 Rxc2 17. Rb1 Kd7 18. Rf2 Rhc8 19. Bf4 Rxa2 20. e4 Rcc2 21. Rxc2 Rxc2+ 22. Kh3 h6 23. Rc1 Rxc1 24. Bxc1 a5 25. Kg2 b5 26. Kf1 a4 27. b4 h5 28. h3 Bc3 29. Ba3 Kd6 30. Ke2 f5 31. Kd3 Be1 32. g4 e6 33. dxe6 Kxe6 34. gxf5+ gxf5 35. f4 fxe4+ 36. Kxe4 Bc3 37. Kd3 Ba1 38. Ke4 Bc3 39. Kd3 Bf6 40. Ke4 Be7 41. f5+ Kf6 42. Kd5 Kxf5 43. Kc6 Kf4 44. Kxb5 Kg3 45. Kxa4 Kxh3 46. b5 Bd8 1/2-1/2

[Event "Olympiad-27"]
[Site "Dubai"]
[Date "1986.11.19"]
[Round "5"]
[White "Borg, Andrew"]
[Black "Araya Numana, Carlos"]
[Result "1/2-1/2"]
[ECO "D36"]
[PlyCount "71"]
[EventDate "1986.11.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "UAE"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]
[WhiteTeam "Malta"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "MLT"]
[BlackTeamCountry "CRI"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Nbd7 5. Bg5 Be7 6. cxd5 exd5 7. e3 c6 8. Bd3 0-0 9. Qc2 h6 10. Bh4 Re8 11. 0-0 Ne4 12. Bxe7 Qxe7 13. Rae1 Ndf6 14. Ne5 Nxc3 15. bxc3 c5 16. Qe2 c4 17. Bb1 b5 18. Qb2 a6 19. f3 Qa7 20. Kh1 Qb6 21. e4 Be6 22. a3 Qc7 23. h3 Nh5 24. Qf2 g5 25. exd5 Bxd5 26. Qc2 Ng3+ 27. Kg1 f6 28. Ng4 Qg7 29. Rxe8+ Rxe8 30. Rf2 Re1+ 31. Kh2 Nf1+ 32. Rxf1 Rxf1 33. Ne3 Qc7+ 34. g3 Rxf3 35. Qg6+ Kf8 36. Qxh6+ 1/2-1/2

[Event "Olympiad-27"]
[Site "Dubai"]
[Date "1986.11.18"]
[Round "4"]
[White "Araya Numana, Carlos"]
[Black "Hamadto, Izz El Din Faisal"]
[Result "1-0"]
[ECO "A37"]
[PlyCount "67"]
[EventDate "1986.11.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "UAE"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]
[WhiteTeam "Costa Rica"]
[BlackTeam "Sudan"]
[WhiteTeamCountry "CRI"]
[BlackTeamCountry "SUD"]

1. c4 c5 2. Nf3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nc3 b6 6. 0-0 Bb7 7. d3 a6 8. Bd2 e6 9. Qc1 Nge7 10. Bh6 0-0 11. Bxg7 Kxg7 12. Rd1 Nd4 13. Nxd4 Bxg2 14. Nxe6+ fxe6 15. Kxg2 Nf5 16. e3 d5 17. cxd5 exd5 18. e4 dxe4 19. dxe4 Nd4 20. f4 Qd7 21. Qe3 Qe6 22. Rd2 Rad8 23. Re1 Nf5 24. Qe2 Qc8 25. Qd1 Nd4 26. Rd3 Rf7 27. Qd2 Qc6 28. Kg1 Re7 29. Qg2 b5 30. e5 Qd7 31. Ne4 Qc6 32. Rc1 Ne6 33. Rd6 Qc7 34. Nf6 1-0

[Event "WchT U26 02 fin-B"]
[Site "Mexico City"]
[Date "1980.09.04"]
[Round "9"]
[White "Araya Numana, Carlos"]
[Black "Nunez Guzman, Jose Luis"]
[Result "0-1"]
[ECO "A03"]
[PlyCount "46"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Costa Rica"]
[BlackTeam "Mexico II"]
[WhiteTeamCountry "CRI"]
[BlackTeamCountry "MEX"]

1. f4 d5 2. Nf3 Nf6 3. e3 g6 4. b3 Bg7 5. Bb2 0-0 6. Be2 c5 7. 0-0 Nc6 8. Ne5 Qc7 9. Nxc6 Qxc6 10. d3 Rd8 11. Nd2 Ng4 12. Bxg4 Bxb2 13. Rb1 Bg7 14. Bxc8 Raxc8 15. Nf3 b5 16. Qc1 a5 17. c4 a4 18. bxa4 bxc4 19. dxc4 Qxa4 20. cxd5 Rxd5 21. Rb7 Qe4 22. Ng5 Rxg5 23. fxg5 Qxb7 0-1

[Event "WchT U26 02 fin-B"]
[Site "Mexico City"]
[Date "1980.09.02"]
[Round "8"]
[White "Waters, John Joseph"]
[Black "Araya Numana, Carlos"]
[Result "1-0"]
[ECO "C45"]
[PlyCount "81"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Wales"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "WLS"]
[BlackTeamCountry "CRI"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3 Bb6 6. Nc3 Nf6 7. Bg5 d6 8. Be2 Qe7 9. 0-0 h6 10. Nd5 Qe5 11. Bxf6 gxf6 12. a4 a5 13. Nd2 Qg5 14. Nf3 Qg7 15. Nxb6 Bh3 16. Nh4 cxb6 17. Qxd6 Rd8 18. Qg3 Qxg3 19. hxg3 Be6 20. Nf3 Nd4 21. Nxd4 Rxd4 22. f3 0-0 23. Rfd1 Rfd8 24. Rxd4 Rxd4 25. Kf1 Bd7 26. b3 Kf8 27. Ke1 Ke7 28. Bc4 Be6 29. Bxe6 Kxe6 30. Ke2 Kd6 31. Rh1 Kc5 32. Rh5+ Kb4 33. Rd5 Kc3 34. g4 Rb4 35. Kd1 b5 36. Kc1 Rd4 37. axb5 b6 38. Rxd4 Kxd4 39. c4 a4 40. Kb2 axb3 41. Kxb3 1-0

[Event "WchT U26 02 fin-B"]
[Site "Mexico City"]
[Date "1980.08.31"]
[Round "7"]
[White "Araya Numana, Carlos"]
[Black "Reyes Najera, Carlos Antonio"]
[Result "1/2-1/2"]
[ECO "A03"]
[PlyCount "80"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Costa Rica"]
[BlackTeam "Guatemala"]
[WhiteTeamCountry "CRI"]
[BlackTeamCountry "GUA"]

1. f4 d5 2. Nf3 Nf6 3. e3 g6 4. b3 Bg7 5. Bb2 0-0 6. Be2 b6 7. 0-0 Ba6 8. c4 dxc4 9. Bxc4 Bxc4 10. bxc4 c5 11. Qc2 Nc6 12. a3 Rc8 13. Ne5 Nxe5 14. Bxe5 Qd7 15. Nc3 Rfd8 16. Rfd1 Qd3 17. Qxd3 Rxd3 18. Kf1 Ne8 19. Bxg7 Kxg7 20. Nd5 e6 21. Ke2 Rb3 22. Nc3 Nd6 23. Kd3 b5 24. cxb5 c4+ 25. Kc2 Nxb5 26. Nxb5 Rxb5 27. Rdb1 Rd5 28. Rb7 Rcd8 29. Rd1 a5 30. a4 Rd3 31. Rc7 Ra3 32. Rxc4 Ra2+ 33. Kb3 Raxd2 34. Rxd2 Rxd2 35. Rc2 Rd5 36. Kc4 f5 37. h3 h5 38. g4 hxg4 39. hxg4 fxg4 40. Rg2 Rd1 1/2-1/2

[Event "WchT U26 02 fin-B"]
[Site "Mexico City"]
[Date "1980.08.30"]
[Round "6"]
[White "Kaminker, Harry"]
[Black "Araya Numana, Carlos"]
[Result "1/2-1/2"]
[ECO "C95"]
[PlyCount "38"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Canada"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "CAN"]
[BlackTeamCountry "CRI"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. h3 d6 9. c3 Nb8 10. d4 Nbd7 11. Bg5 Bb7 12. Nbd2 h6 13. Bh4 c5 14. Bg3 Qc7 15. Nh4 Rfe8 16. Nf5 Bf8 17. dxe5 dxe5 18. Bc2 c4 19. a4 Rad8 1/2-1/2

[Event "WchT U26 02 fin-B"]
[Site "Mexico City"]
[Date "1980.08.29"]
[Round "5"]
[White "Klauser, Markus"]
[Black "Araya Numana, Carlos"]
[Result "1-0"]
[ECO "A08"]
[PlyCount "53"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Switzerland"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "SUI"]
[BlackTeamCountry "CRI"]

1. g3 d5 2. Nf3 c5 3. Bg2 Nf6 4. 0-0 Nc6 5. d3 g6 6. Nbd2 Bg7 7. e4 0-0 8. Re1 Bg4 9. h3 Bc8 10. c3 dxe4 11. dxe4 b6 12. e5 Nd5 13. Nf1 Bb7 14. Qe2 e6 15. Bg5 Qc7 16. N1h2 h6 17. Bc1 Rad8 18. Ng4 Kh7 19. Qe4 Ndb4 20. cxb4 Nd4 21. Qf4 Nc2 22. Nf6+ Kh8 23. Be3 Bxf3 24. Bxf3 Nxa1 25. Rxa1 Qe7 26. Qh4 Bxf6 27. exf6 1-0

[Event "WchT U26 02 fin-B"]
[Site "Mexico City"]
[Date "1980.08.26"]
[Round "3"]
[White "Ruiz Gonzalez, Guillermo"]
[Black "Araya Numana, Carlos"]
[Result "1-0"]
[ECO "C50"]
[PlyCount "109"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Mexico"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "MEX"]
[BlackTeamCountry "CRI"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Be7 5. Nxd4 d6 6. 0-0 Nf6 7. Nc3 Nxd4 8. Qxd4 0-0 9. Re1 c6 10. a4 Nd7 11. Bf4 Qb6 12. Qd2 Ne5 13. Be2 Be6 14. Be3 Qc7 15. f4 Nc4 16. Bxc4 Bxc4 17. Rad1 Rad8 18. Qd4 Ba6 19. Qxa7 c5 20. Nd5 Qd7 21. Nxe7+ Qxe7 22. e5 Rfe8 23. exd6 Rxd6 24. Qxc5 Rxd1 25. Rxd1 Qe4 26. b3 h6 27. Re1 b6 28. Qxb6 Re6 29. Qd8+ Kh7 30. Qd2 Rg6 31. c4 Bb7 32. Re2 Qb1+ 33. Qc1 Qe4 34. Qc2 Qe7 35. Bd4 Qh4 36. Qd2 Qh3 37. Qc2 f5 38. a5 Be4 39. Rxe4 fxe4 40. Qxe4 Qxb3 41. h3 Qxc4 42. a6 Qc6 43. Qxc6 Rxc6 44. a7 Ra6 45. Kf2 Kg6 46. Ke3 Kf7 47. f5 g6 48. f6 g5 49. Kd3 h5 50. Kc4 h4 51. Kb5 Rxa7 52. Bxa7 Kxf6 53. Kc4 Kf5 54. Kd3 g4 55. Ke3 1-0

[Event "WchT U26 02 fin-B"]
[Site "Mexico City"]
[Date "1980.08.25"]
[Round "2"]
[White "Leal, Omar"]
[Black "Araya Numana, Carlos"]
[Result "1/2-1/2"]
[ECO "A34"]
[PlyCount "34"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Venezuela"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "VEN"]
[BlackTeamCountry "CRI"]

1. c4 Nf6 2. Nc3 e6 3. e4 c5 4. d3 Nc6 5. Nf3 d6 6. Be2 Be7 7. 0-0 0-0 8. h3 a6 9. Ne1 Nd4 10. f4 b5 11. Nc2 b4 12. Nb1 Nxe2+ 13. Qxe2 d5 14. e5 Ne8 15. Nd2 Bb7 16. Rd1 Qb6 17. Ne1 f6 1/2-1/2

[Event "WchT U26 02 fin-B"]
[Site "Mexico City"]
[Date "1980.08.24"]
[Round "1"]
[White "Araya Numana, Carlos"]
[Black "Carbajal, Jorge"]
[Result "1/2-1/2"]
[ECO "A03"]
[PlyCount "95"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Costa Rica"]
[BlackTeam "Honduras"]
[WhiteTeamCountry "CRI"]
[BlackTeamCountry "HON"]

1. f4 d5 2. Nf3 c5 3. e3 g6 4. Bb5+ Bd7 5. Qe2 a6 6. Bxd7+ Nxd7 7. 0-0 Ngf6 8. b3 Rc8 9. Bb2 Bg7 10. d3 0-0 11. Nbd2 Nh5 12. Bxg7 Nxg7 13. c4 Nf6 14. Ne5 Qd6 15. Rad1 Nf5 16. g4 Ng7 17. Ndf3 Nd7 18. g5 Ne6 19. Nxd7 Qxd7 20. Ne5 Qd6 21. Qf2 d4 22. Ng4 dxe3 23. Qxe3 Nd4 24. Nh6+ Kh8 25. f5 Nc2 26. Qf4 Qd4+ 27. Qxd4+ Nxd4 28. Rde1 Rce8 29. Re3 b6 30. Rf4 gxf5 31. Nxf5 e5 32. Rf2 Re6 33. Kf1 Kg8 34. Nh6+ Kg7 35. Ng4 Nc6 36. Nf6 Nd4 37. Rh3 Rh8 38. Rh6 Kf8 39. Rxh7 Rxh7 40. Nxh7+ Kg7 41. Nf6 Kg6 42. Ne4 Nf5 43. Rf3 Nd6 44. Nxd6 Rxd6 45. Rg3 Rd4 46. Ke2 Rh4 47. Rf3 Rxh2+ 48. Ke3 1/2-1/2

[Event "WchT U26 02 prel-5"]
[Site "Mexico City"]
[Date "1980.08.23"]
[Round "5"]
[White "Araya Numana, Carlos"]
[Black "Mendoza, Rafael Enrique"]
[Result "1/2-1/2"]
[ECO "C30"]
[PlyCount "40"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Costa Rica"]
[BlackTeam "Columbia"]
[WhiteTeamCountry "CRI"]
[BlackTeamCountry "COL"]

1. f4 e5 2. e4 Bc5 3. Nf3 d6 4. Bc4 Nf6 5. d3 0-0 6. Nc3 Ng4 7. Qe2 Nc6 8. Nd5 Bf2+ 9. Kd2 Nd4 10. Nxd4 exd4 11. h3 Be3+ 12. Nxe3 Nxe3 13. c3 c5 14. Qf3 Be6 15. Bxe6 fxe6 16. Ke2 Qb6 17. Rb1 c4 18. Bxe3 cxd3+ 19. Kxd3 dxe3 20. Qxe3 Qa6+ 1/2-1/2

[Event "WchT U26 02 prel-5"]
[Site "Mexico City"]
[Date "1980.08.21"]
[Round "4"]
[White "Liao, Yuan Eu"]
[Black "Araya Numana, Carlos"]
[Result "1/2-1/2"]
[ECO "C68"]
[PlyCount "81"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Dominican Republic"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "DOM"]
[BlackTeamCountry "CRI"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bc4 Nf6 5. 0-0 Be7 6. Re1 0-0 7. c3 d5 8. exd5 Nxd5 9. Nxe5 Nxe5 10. Rxe5 c6 11. d4 Bd6 12. Re1 Qh4 13. g3 Qh3 14. Be3 Bg4 15. Qd3 Rae8 16. Nd2 Re6 17. a4 Qh5 18. Qf1 b5 19. axb5 axb5 20. Bxd5 Qxd5 21. Qg2 Qh5 22. Ra2 Rfe8 23. f3 Bh3 24. Qf2 f5 25. f4 g5 26. fxg5 f4 27. Bxf4 Re2 28. Rxe2 Rxe2 29. Bxd6 Rxf2 30. Kxf2 Qxg5 31. Ra8+ Kg7 32. Ra7+ Kg6 33. Nf3 Qc1 34. Ba3 h5 35. Rc7 Kf5 36. Re7 Qf1+ 37. Ke3 Kf6 38. Re8 Qc1+ 39. Kf2 Bg4 40. Re1 Qc2+ 41. Re2 1/2-1/2

[Event "WchT U26 02 prel-5"]
[Site "Mexico City"]
[Date "1980.08.19"]
[Round "2"]
[White "Araya Numana, Carlos"]
[Black "Feltz, Marc"]
[Result "1-0"]
[ECO "A03"]
[PlyCount "57"]
[EventDate "1980.08.17"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "MEX"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]
[WhiteTeam "Costa Rica"]
[BlackTeam "Luxembourg"]
[WhiteTeamCountry "CRI"]
[BlackTeamCountry "LUX"]

1. f4 Nc6 2. Nf3 d5 3. e3 a6 4. b3 e6 5. Bb2 Nf6 6. c4 g6 7. Be2 Bg7 8. 0-0 0-0 9. Ne5 Nxe5 10. Bxe5 c6 11. Qc2 Nd7 12. Bxg7 Kxg7 13. Nc3 b5 14. a3 Bb7 15. d4 f6 16. e4 Qe7 17. Rfe1 f5 18. exd5 bxc4 19. Bxc4 cxd5 20. Nxd5 Qd6 21. Nb4 Qxd4+ 22. Qf2 Qxf2+ 23. Kxf2 a5 24. Rxe6 Nc5 25. Re7+ Kf6 26. Rc7 axb4 27. Rxc5 bxa3 28. Rc7 Be4 29. Rd1 1-0

[Event "WchT Students 22nd final B"]
[Site "Mexico City"]
[Date "1977.08.20"]
[Round "7"]
[White "Araya Numana, Carlos"]
[Black "Buchholz, Martin"]
[Result "0-1"]
[ECO "A06"]
[PlyCount "56"]
[EventDate "1977.08.14"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]
[WhiteTeam "Costa Rica"]
[BlackTeam "Canada"]
[WhiteTeamCountry "CRI"]
[BlackTeamCountry "CAN"]

1. b3 d5 2. Bb2 Bf5 3. Nf3 Nd7 4. e3 Ngf6 5. Be2 e6 6. 0-0 Bd6 7. Nh4 Bg6 8. f4 Qe7 9. d3 Bc5 10. d4 Bd6 11. c4 c6 12. Nxg6 hxg6 13. Nd2 g5 14. h3 gxf4 15. exf4 Nf8 16. Bd3 0-0-0 17. c5 Bb8 18. Rf3 Nh5 19. Qf1 f5 20. Re1 Qh4 21. b4 Nxf4 22. a4 Nxg2 23. Rxe6 Nxe6 24. Qxg2 g6 25. Qf2 Ng5 26. Qe2 Rde8 27. Re3 Nxh3+ 28. Kf1 Qf4+ 0-1

[Event "WchT Students 22nd final B"]
[Site "Mexico City"]
[Date "1977.08.15"]
[Round "2"]
[White "Hughes, Anthony"]
[Black "Araya Numana, Carlos"]
[Result "1-0"]
[ECO "B21"]
[PlyCount "23"]
[EventDate "1977.08.14"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "MEX"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]
[WhiteTeam "Wales"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "WLS"]
[BlackTeamCountry "CRI"]

1. d4 c5 2. e4 cxd4 3. c3 d3 4. c4 d6 5. Bxd3 Nc6 6. Nf3 g6 7. 0-0 Bg7 8. h3 Nf6 9. Nc3 0-0 10. Be3 Bd7 11. a3 a6 12. Qc2 1-0

[Event "WchT Students 22nd Group2"]
[Site "Mexico City"]
[Date "1977.08.08"]
[Round "2"]
[White "Vilela de Acuna, Jose Luis"]
[Black "Araya Numana, Carlos"]
[Result "1-0"]
[ECO "A65"]
[WhiteElo "2405"]
[PlyCount "15"]
[EventDate "1977.08.07"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "MEX"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]
[WhiteTeam "Cuba"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "CUB"]
[BlackTeamCountry "CRI"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Bb5+ Bd7 8. a4 1-0

