[Event "CACAC-chT 9th"]
[Site "Guatemala City"]
[Date "1971.??.??"]
[Round "7"]
[White "De Boer, Willem"]
[Black "Biava, Pio"]
[Result "1/2-1/2"]
[ECO "C05"]
[PlyCount "50"]
[EventDate "1971.07.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GUA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Netherlands Antilles"]
[BlackTeam "Venezuela"]
[WhiteTeamCountry "AHO"]
[BlackTeamCountry "VEN"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. c3 Nc6 5. Ngf3 Nf6 6. e5 Nd7 7. Be2 Be7 8. 0-0 f6 9. exf6 Bxf6 10. dxc5 Nxc5 11. Nb3 Nxb3 12. Qxb3 0-0 13. Be3 Na5 14. Qc2 e5 15. Rad1 Be6 16. Bd3 h6 17. Bh7+ Kh8 18. Bc5 Rf7 19. Bg6 Rc7 20. Bb4 Nc6 21. Ba3 Qc8 22. Bd6 Rd7 23. Bc5 b6 24. Be3 Rd6 25. Qd2 Bf5 1/2-1/2

[Event "CACAC-chT 9th"]
[Site "Guatemala City"]
[Date "1971.??.??"]
[Round "9"]
[White "De Boer, Willem"]
[Black "Escondrillas, Carlos"]
[Result "0-1"]
[ECO "B84"]
[PlyCount "74"]
[EventDate "1971.07.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GUA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Netherlands Antilles"]
[BlackTeam "Mexico"]
[WhiteTeamCountry "AHO"]
[BlackTeamCountry "MEX"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. 0-0 Qc7 8. f4 Be7 9. Bf3 Nbd7 10. Be3 Nb6 11. Kh1 Nc4 12. Bc1 Bd7 13. b3 Na5 14. Bb2 0-0 15. Nce2 e5 16. Nf5 Bxf5 17. exf5 e4 18. Bxf6 Bxf6 19. Bxe4 Bxa1 20. Qxa1 d5 21. Bd3 Qd6 22. Qe1 Nc6 23. c3 Rfe8 24. Rf3 Re7 25. Rh3 h6 26. g4 Qxf4 27. Nxf4 Rxe1+ 28. Kg2 Ne5 29. Nxd5 Nxg4 30. Rg3 Ne5 31. f6 Nxd3 32. Ne7+ Rxe7 33. fxe7 Nf4+ 34. Kf2 Re8 35. Re3 Ne6 36. c4 Rxe7 37. b4 Kf8 0-1

[Event "CACAC-chT 9th"]
[Site "Guatemala City"]
[Date "1971.??.??"]
[Round "6"]
[White "De Boer, Willem"]
[Black "Giron, Abel"]
[Result "1/2-1/2"]
[ECO "C64"]
[PlyCount "49"]
[EventDate "1971.07.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GUA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Netherlands Antilles"]
[BlackTeam "Guatemala"]
[WhiteTeamCountry "AHO"]
[BlackTeamCountry "GUA"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. 0-0 Nge7 5. c3 Bb6 6. d4 exd4 7. cxd4 d5 8. exd5 Nxd5 9. Re1+ Be6 10. Ne5 Nde7 11. Bxc6+ bxc6 12. Nxc6 Nxc6 13. d5 Qf6 14. Be3 0-0-0 15. Nc3 Ne7 16. Bxb6 axb6 17. Qe2 Bxd5 18. Qxe7 Qxe7 19. Rxe7 Be6 20. Rc1 Rde8 21. Rxe8+ Rxe8 22. f3 Re7 23. Rd1 Rd7 24. Rxd7 Kxd7 25. Kf2 1/2-1/2

[Event "CACAC-chT 9th"]
[Site "Guatemala City"]
[Date "1971.??.??"]
[Round "2"]
[White "De Boer, Willem"]
[Black "Haskins, Marcos"]
[Result "1/2-1/2"]
[ECO "B41"]
[PlyCount "34"]
[EventDate "1971.07.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GUA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Netherlands Antilles"]
[BlackTeam "Panama"]
[WhiteTeamCountry "AHO"]
[BlackTeamCountry "PAN"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Be7 6. Be2 Qc7 7. Nc3 b6 8. Be3 Bb7 9. 0-0 Nf6 10. Bd3 Nc6 11. Nxc6 Qxc6 12. Qe2 Rd8 13. f3 0-0 14. Qf2 Bc5 15. Bxc5 Qxc5 16. Qxc5 bxc5 17. e5 Ne8 1/2-1/2

[Event "CACAC-chT 9th"]
[Site "Guatemala City"]
[Date "1971.??.??"]
[Round "8"]
[White "De Boer, Willem"]
[Black "Jorge, Gustavo"]
[Result "0-1"]
[ECO "B84"]
[PlyCount "114"]
[EventDate "1971.07.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GUA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Netherlands Antilles"]
[BlackTeam "Nicaragua"]
[WhiteTeamCountry "AHO"]
[BlackTeamCountry "NCA"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. 0-0 Qc7 8. f4 Be7 9. Bf3 Nbd7 10. Be3 Nc5 11. Qe2 Bd7 12. b4 Na4 13. Nxa4 Bxa4 14. c4 0-0 15. Rfc1 Nd7 16. Rab1 g6 17. g4 e5 18. Nb3 exf4 19. Bxf4 Ne5 20. Bg2 Qd7 21. h3 Rac8 22. Bh6 Rfe8 23. Nd4 Bf6 24. g5 Bh8 25. Kh1 Nc6 26. Nxc6 Bxc6 27. Qd3 Qe6 28. Re1 b5 29. cxb5 Bxb5 30. Qd5 Qxd5 31. exd5 Bc3 32. Rxe8+ Rxe8 33. a3 Re1+ 34. Rxe1 Bxe1 35. Kg1 Bc3 36. Bf1 Bd2 37. Kf2 f5 38. Be2 Kf7 39. Kf3 Kg8 40. Kf2 Kf7 41. Kf3 Kg8 42. Kf2 Bc1 43. a4 Bxa4 44. Bxa6 Bb3 45. Bb7 Kf7 46. Bc6 Ba3 47. b5 Bc5+ 48. Kf3 Bc2 49. Ke2 Be4 50. h4 f4 51. Bd7 f3+ 52. Kd2 Bxd5 53. Bg4 f2 54. Be2 Bg2 55. Bc4+ d5 56. Be2 f1Q 57. Bxf1 Bxf1 0-1

[Event "CACAC-chT 9th"]
[Site "Guatemala City"]
[Date "1971.??.??"]
[Round "1"]
[White "Deras, Gonzalo"]
[Black "De Boer, Willem"]
[Result "1/2-1/2"]
[ECO "B53"]
[PlyCount "81"]
[EventDate "1971.07.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GUA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Honduras"]
[BlackTeam "Netherlands Antilles"]
[WhiteTeamCountry "HON"]
[BlackTeamCountry "AHO"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 a6 6. Bxc6+ bxc6 7. Nc3 c5 8. Qd3 e6 9. Bf4 Ra7 10. Rd1 Rd7 11. 0-0 Be7 12. Rfe1 Nf6 13. Bg5 0-0 14. Qe2 Re8 15. e5 Nd5 16. Nxd5 Bxg5 17. exd6 Rxd6 18. Nxg5 Rxd5 19. Qh5 Rxd1 20. Rxd1 Qf6 21. Qxh7+ Kf8 22. Qh4 Qxb2 23. Qh5 g6 24. Qf3 f5 25. Qh3 Qg7 26. Qh4 Kg8 27. Qc4 Qe7 28. f4 Kg7 29. Nf3 Bb7 30. Qc3+ Kg8 31. Ne5 Rd8 32. Rxd8+ Qxd8 33. Qd3 Qd4+ 34. Qxd4 cxd4 35. Kf2 Be4 36. Nd3 Bxd3 37. cxd3 Kg7 38. g3 Kf6 39. Kf3 e5 40. h4 exf4 41. gxf4 1/2-1/2

[Event "CACAC-chT 9th"]
[Site "Guatemala City"]
[Date "1971.??.??"]
[Round "3"]
[White "Potter, Adolphe"]
[Black "De Boer, Willem"]
[Result "1-0"]
[ECO "D00"]
[PlyCount "81"]
[EventDate "1971.07.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GUA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "US Virgin Islands"]
[BlackTeam "Netherlands Antilles"]
[WhiteTeamCountry "ISV"]
[BlackTeamCountry "AHO"]

1. d4 Nf6 2. e3 e6 3. Bd3 d5 4. Nd2 c5 5. c3 Nc6 6. f4 Bd6 7. Ngf3 0-0 8. Ne5 cxd4 9. cxd4 Nb4 10. Bb1 Qc7 11. a3 Nc6 12. 0-0 Bxe5 13. fxe5 Ne8 14. Qh5 g6 15. Qh6 f6 16. Nb3 Qg7 17. Qxg7+ Kxg7 18. exf6+ Rxf6 19. Nc5 Rxf1+ 20. Kxf1 b6 21. Nd3 Ba6 22. b4 Nd6 23. Ke1 Re8 24. Ra2 Ne4 25. Ne5 Nxe5 26. Bxe4 Ng4 27. Bf3 Nxh2 28. Rc2 Re7 29. a4 Bc4 30. b5 Bb3 31. Rc8 Bxa4 32. Ba3 Rf7 33. Be2 h5 34. Rc6 Kf6 35. e4 dxe4 36. d5 Kf5 37. dxe6 Rf6 38. e7 Rxc6 39. e8Q Rc3 40. Qf7+ Ke5 41. Qg7+ 1-0

[Event "CACAC-chT 9th"]
[Site "Guatemala City"]
[Date "1971.??.??"]
[Round "5"]
[White "Rojas, Benjamin"]
[Black "De Boer, Willem"]
[Result "0-1"]
[ECO "A60"]
[PlyCount "70"]
[EventDate "1971.07.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GUA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "El Salvador"]
[BlackTeam "Netherlands Antilles"]
[WhiteTeamCountry "ESA"]
[BlackTeamCountry "AHO"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. Nxd5 Nxd5 6. Qxd5 Nc6 7. Nf3 Nb4 8. Qd1 Be7 9. Bd2 Bf6 10. Qb3 Qe7 11. e3 a5 12. a3 a4 13. Qd1 Nc6 14. Qc2 d6 15. Ng1 Nd4 16. Qb1 Nb3 17. Ra2 Nxd2 18. Kxd2 Be6 19. Ke1 0-0 20. Ra1 Qc7 21. Bd3 h6 22. Ne2 Qa5+ 23. Kf1 Qd2 24. Ra2 Qa5 25. Nf4 Bg5 26. Nxe6 fxe6 27. Ke2 Qc7 28. Qd1 d5 29. cxd5 exd5 30. Bb5 Qe5 31. h4 Rxf2+ 32. Kxf2 Qxe3+ 33. Kf1 Rf8+ 34. Qf3 Rxf3+ 35. gxf3 Qxf3+ 0-1

[Event "CACAC-chT 9th"]
[Site "Guatemala City"]
[Date "1971.??.??"]
[Round "4"]
[White "Yabra, Frederico"]
[Black "De Boer, Willem"]
[Result "1-0"]
[ECO "E76"]
[PlyCount "125"]
[EventDate "1971.07.31"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "GUA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Dominican Republic"]
[BlackTeam "Netherlands Antilles"]
[WhiteTeamCountry "DOM"]
[BlackTeamCountry "AHO"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 c5 6. d5 0-0 7. Nf3 e5 8. fxe5 dxe5 9. Bg5 h6 10. Bh4 Qa5 11. Qd2 Nbd7 12. Bd3 a6 13. 0-0 Re8 14. a3 Nh7 15. Rfb1 g5 16. Bf2 Bf8 17. b4 Qc7 18. Be3 f6 19. Qf2 Kg7 20. Nd2 Be7 21. Nb3 cxb4 22. axb4 Bxb4 23. Na4 Bf8 24. c5 Rb8 25. d6 Qd8 26. Nc3 Nxc5 27. Nxc5 Bxd6 28. Rd1 Qe7 29. Nd5 Qf8 30. Nb6 Bg4 31. Ncd7 Qf7 32. Nxb8 Bxd1 33. Nxa6 Bg4 34. Nc5 Nf8 35. Nd5 Bxc5 36. Bxc5 Nd7 37. Bd6 Be6 38. Ne3 Nb8 39. Bb5 Rd8 40. Bxb8 Rxb8 41. Nf5+ Bxf5 42. Qxf5 Qb3 43. Qd7+ Kg6 44. Qc7 Qe3+ 45. Kh1 Qd4 46. Rf1 Qd8 47. Qc4 Qd6 48. Ba4 Rd8 49. Bb3 Qe7 50. h3 b6 51. Rc1 h5 52. Qb5 Rd6 53. Rc8 Rd8 54. Rc6 Rd6 55. Rxb6 Rxb6 56. Qxb6 Qa3 57. Qe3 Qa1+ 58. Kh2 Qf1 59. Qf3 Qa6 60. Qf5+ Kg7 61. Qd7+ Kg6 62. Qf7+ Kh6 63. Qf8+ 1-0

[Event "Caracas CACAC Team Ch 2nd"]
[Site "Caracas"]
[Date "1964.02.27"]
[Round "4"]
[White "De Boer, Willem"]
[Black "Castillo, Francisco"]
[Result "1/2-1/2"]
[ECO "C90"]
[PlyCount "80"]
[EventDate "1964.02.23"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "VEN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "Netherlands Antilles"]
[BlackTeam "Nicaragua"]
[WhiteTeamCountry "AHO"]
[BlackTeamCountry "NCA"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. h3 Na5 9. d4 Nxb3 10. axb3 Bb7 11. Nbd2 0-0 12. d5 Ne8 13. Nf1 g6 14. Bh6 Ng7 15. Ng3 Bc8 16. Qe2 f5 17. exf5 Bxf5 18. Bxg7 Kxg7 19. Nxf5+ Rxf5 20. Nd4 exd4 21. Qxe7+ Qxe7 22. Rxe7+ Kh6 23. Rxc7 Rxd5 24. Re1 d3 25. Rd1 d2 26. Re7 Rc8 27. c3 b4 28. Re3 a5 29. Kf1 bxc3 30. bxc3 Rdc5 31. b4 axb4 32. cxb4 Rd5 33. Ke2 Rc4 34. Rd3 Rxd3 35. Kxd3 Rxb4 36. Rxd2 Kg5 37. Kc3 Rf4 38. f3 Rf6 39. Kd4 Kf4 40. Kd5 Kg3 1/2-1/2

[Event "Caracas CACAC Team Ch 2nd"]
[Site "Caracas"]
[Date "1964.02.26"]
[Round "3"]
[White "Reissmann, Paul"]
[Black "De Boer, Willem"]
[Result "1-0"]
[ECO "B48"]
[PlyCount "79"]
[EventDate "1964.02.23"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "VEN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "Puerto Rico"]
[BlackTeam "Netherlands Antilles"]
[WhiteTeamCountry "PUR"]
[BlackTeamCountry "AHO"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. a3 Qc7 7. Be3 a6 8. Be2 b5 9. f4 Nxd4 10. Qxd4 Bb7 11. Bf3 d6 12. 0-0 Rd8 13. Qd2 Be7 14. Qf2 Rd7 15. Rad1 0-0 16. Rd2 d5 17. exd5 Nxd5 18. Nxd5 Bxd5 19. Rfd1 Qc6 20. Bxd5 Rxd5 21. Rxd5 exd5 22. c3 Bf6 23. g4 h6 24. h4 g6 25. g5 hxg5 26. hxg5 Bg7 27. Rd2 f6 28. Qg2 fxg5 29. Qxg5 Rf5 30. Qd8+ Kf7 31. Re2 Bf6 32. Qb8 Qd7 33. Rh2 Rh5 34. Rg2 Qh3 35. Qa7+ Be7 36. Kf2 Qh4+ 37. Ke2 Qf6 38. Bc5 Qe6+ 39. Kd2 Rh6 40. Re2 1-0

[Event "Caracas CACAC Team Ch 2nd"]
[Site "Caracas"]
[Date "1964.02.25"]
[Round "2"]
[White "De Boer, Willem"]
[Black "Diaz Calderon, Salvador"]
[Result "1/2-1/2"]
[ECO "C82"]
[PlyCount "77"]
[EventDate "1964.02.23"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "VEN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "Netherlands Antilles"]
[BlackTeam "Venezuela"]
[WhiteTeamCountry "AHO"]
[BlackTeamCountry "VEN"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5 10. Nbd2 0-0 11. Bc2 Nxf2 12. Rxf2 f6 13. Nf1 Bxf2+ 14. Kxf2 fxe5 15. Kg1 Bg4 16. Bb3 Ne7 17. Bg5 c6 18. Ne3 Qb6 19. Kh1 Bxf3 20. gxf3 Rf7 21. Qe2 Raf8 22. Bxe7 Rxe7 23. Bxd5+ cxd5 24. Nxd5 Qe6 25. Nxe7+ Qxe7 26. Rf1 Qf6 27. Qe4 g6 28. Kg2 Qg5+ 29. Qg4 Qe3 30. Qe4 Qg5+ 31. Qg4 Qe3 32. Qe4 Qxe4 33. fxe4 Rxf1 34. Kxf1 g5 35. h3 Kf7 36. Kf2 Ke6 37. Kf3 h5 38. b3 Kd6 39. b4 1/2-1/2

[Event "Caracas CACAC Team Ch 2nd"]
[Site "Caracas"]
[Date "1964.02.24"]
[Round "1"]
[White "De Boer, Willem"]
[Black "Gutierrez, Jairo"]
[Result "0-1"]
[ECO "B48"]
[PlyCount "44"]
[EventDate "1964.02.23"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "VEN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "Netherlands Antilles"]
[BlackTeam "Colombia"]
[WhiteTeamCountry "AHO"]
[BlackTeamCountry "COL"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Qc7 6. Be2 a6 7. Be3 b5 8. a3 Bb7 9. Qd2 Nf6 10. f3 Rd8 11. Rd1 Be7 12. 0-0 d5 13. exd5 Nxd5 14. Nxd5 Rxd5 15. Qc1 0-0 16. Nxc6 Bxc6 17. Rxd5 Bxd5 18. Bd3 Bf6 19. c3 Rd8 20. Qc2 h6 21. Qe2 Bb3 22. Qd2 Bc4 0-1

