[Event "Pan American Junior-ch03"]
[Site "Sao Paulo"]
[Date "1977.12.23"]
[Round "11"]
[White "Braga, Cicero Nogueira"]
[Black "Vaca Pereira, Jaime"]
[Result "0-1"]
[ECO "B76"]
[PlyCount "60"]
[EventDate "1977.12.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 0-0 8. Qd2 Nc6 9. 0-0-0 Bd7 10. h4 Ne5 11. h5 Rc8 12. Kb1 Nc4 13. Bxc4 Rxc4 14. Nde2 b5 15. e5 dxe5 16. hxg6 Qc8 17. Bh6 fxg6 18. Bxg7 Kxg7 19. g4 Be6 20. Qh6+ Kg8 21. g5 Nh5 22. Rxh5 gxh5 23. g6 hxg6 24. Qxg6+ Kh8 25. Qh6+ Kg8 26. Qg6+ Kh8 27. Qxh5+ Kg8 28. Rg1+ Bg4 29. Qg6+ Kh8 30. Qh5+ Bxh5 0-1

[Event "Pan American Junior-ch03"]
[Site "Sao Paulo"]
[Date "1977.12.21"]
[Round "10"]
[White "Vaca Pereira, Jaime"]
[Black "Delgado, Felipe"]
[Result "1/2-1/2"]
[ECO "B76"]
[PlyCount "76"]
[EventDate "1977.12.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 g6 7. Be3 Bg7 8. f3 0-0 9. Qd2 d5 10. 0-0-0 e6 11. exd5 Nxd5 12. Nxd5 Qxd5 13. Kb1 Nxd4 14. Bxd4 e5 15. Bc3 Qc6 16. Qd6 Qxd6 17. Rxd6 Be6 18. Rhd1 Rfc8 19. Bb5 Bf8 20. R6d3 Bf5 21. Re3 Rd8 22. Rxd8 Rxd8 23. Bd3 Bxd3 24. Rxd3 Rxd3 25. cxd3 Bd6 26. Kc2 f5 27. Kb3 Kf7 28. h3 Ke6 29. Kc4 a6 30. a4 h6 31. b4 b6 32. Bd2 h5 33. Be3 Bc7 34. g3 h4 35. gxh4 Kd6 36. Bg5 Ke6 37. Be3 Kd6 38. Bg5 Ke6 1/2-1/2

[Event "Pan American Junior-ch03"]
[Site "Sao Paulo"]
[Date "1977.12.20"]
[Round "9"]
[White "Clara Melendez, Romeo"]
[Black "Vaca Pereira, Jaime"]
[Result "1-0"]
[ECO "B95"]
[PlyCount "55"]
[EventDate "1977.12.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. Qf3 Be7 8. 0-0-0 Qc7 9. Be2 Nc6 10. Qg3 e5 11. Nf5 Bxf5 12. exf5 Nd4 13. Bd3 Rc8 14. Be3 Qa5 15. Kb1 Nb5 16. Bxb5+ axb5 17. Nd5 Nxd5 18. Rxd5 Qc7 19. Qxg7 Qxc2+ 20. Ka1 Qe4 21. Rhd1 Kd7 22. Qxf7 Rc6 23. f6 Re8 24. fxe7 Rxe7 25. Qg8 Ra6 26. Qb8 Qa4 27. Rxd6+ Rxd6 28. Rxd6# 1-0

[Event "Pan American Junior-ch03"]
[Site "Sao Paulo"]
[Date "1977.12.19"]
[Round "8"]
[White "Vaca Pereira, Jaime"]
[Black "McCambridge, Vincent"]
[Result "0-1"]
[ECO "B87"]
[PlyCount "86"]
[EventDate "1977.12.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 b5 8. Bg5 Be7 9. Qd2 Qa5 10. Bxf6 Bxf6 11. 0-0-0 Bb7 12. Nxe6 fxe6 13. Qxd6 Qd8 14. Qxe6+ Qe7 15. Qb6 Bxc3 16. bxc3 Nc6 17. f4 Rb8 18. e5 Qa3+ 19. Kb1 Ba8 20. Qc7 Qe7 21. Qxe7+ Kxe7 22. Rd6 Rhd8 23. Rhd1 Bb7 24. g4 Na5 25. f5 Nxb3 26. cxb3 Rxd6 27. Rxd6 Bf3 28. Rxa6 Bxg4 29. Ra7+ Kf8 30. f6 gxf6 31. exf6 Rb6 32. Kc1 h5 33. a4 bxa4 34. bxa4 Rxf6 35. Kd2 Rf2+ 36. Ke3 Rxh2 37. a5 h4 38. a6 h3 39. Ra8+ Kg7 40. Rb8 Ra2 41. Kf4 h2 42. Rb1 Bd7 43. a7 Bc6 0-1

[Event "Pan American Junior-ch03"]
[Site "Sao Paulo"]
[Date "1977.12.17"]
[Round "7"]
[White "Vaca Pereira, Jaime"]
[Black "Bernat, Miguel"]
[Result "0-1"]
[ECO "A53"]
[PlyCount "96"]
[EventDate "1977.12.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. e4 e5 5. d5 Be7 6. Bd3 0-0 7. Nge2 Ne8 8. 0-0 Bg5 9. f4 exf4 10. Bxf4 Ne5 11. Bxe5 dxe5 12. Kh1 Nf6 13. Qe1 Qe7 14. a3 a5 15. Nd1 Bd7 16. Nec3 Nh5 17. Ne2 Ra6 18. c5 Rh6 19. b4 Ra8 20. Bc4 Nf6 21. Nf2 Be3 22. h3 Bxf2 23. Qxf2 Nxe4 24. Qe3 Nf6 25. Rad1 Rh4 26. d6 cxd6 27. cxd6 Qd8 28. Bd5 Nxd5 29. Rxd5 Be6 30. Rdd1 Qd7 31. Kh2 axb4 32. axb4 Rxb4 33. Qxe5 Ra6 34. Nf4 Rb5 35. Qd4 Bb3 36. Rc1 Rxd6 37. Qa7 Re5 38. Rb1 Ra6 39. Qf2 Ba4 40. Qb2 Rb5 41. Qf2 Rxb1 42. Rxb1 Bc6 43. Re1 h6 44. Qc5 Qd2 45. Rf1 Ra5 46. Qf2 Ra2 47. Ne2 Qd6+ 48. Kh1 Qe6 0-1

[Event "Pan American Junior-ch03"]
[Site "Sao Paulo"]
[Date "1977.12.16"]
[Round "6"]
[White "Ferrao, Luis"]
[Black "Vaca Pereira, Jaime"]
[Result "1-0"]
[ECO "B84"]
[PlyCount "49"]
[EventDate "1977.12.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 e6 7. 0-0 Be7 8. Be3 a6 9. f4 Qc7 10. Qe1 b5 11. Nxc6 Qxc6 12. Bf3 e5 13. Qg3 h5 14. Nd5 Ng4 15. Bxg4 hxg4 16. Nxe7 Kxe7 17. fxe5 dxe5 18. Qxe5+ Kf8 19. Qg5 Be6 20. Bd4 Rh7 21. Qg6 Qd6 22. Rxf7+ Bxf7 23. Qxd6+ Kg8 24. Rf1 Rh6 25. Qe7 1-0

[Event "Pan American Junior-ch03"]
[Site "Sao Paulo"]
[Date "1977.12.15"]
[Round "5"]
[White "Vaca Pereira, Jaime"]
[Black "Rivera Kuzawka, Daniel"]
[Result "0-1"]
[ECO "B03"]
[PlyCount "74"]
[EventDate "1977.12.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. d4 d6 5. f4 dxe5 6. fxe5 Nc6 7. Nf3 Bf5 8. a3 e6 9. Nc3 Be7 10. Be3 Bg4 11. Be2 Bxf3 12. Bxf3 Nxc4 13. Bxc6+ bxc6 14. Qe2 Nxe3 15. Qxe3 Bh4+ 16. g3 Bg5 17. Qe4 0-0 18. Rd1 Qb8 19. b4 a5 20. Rb1 axb4 21. Rxb4 Qa7 22. a4 c5 23. dxc5 Qxc5 24. Rc4 Qb6 25. h4 Be3 26. Ke2 Bg1 27. Nd1 Rad8 28. Ne3 Bxe3 29. Qxe3 Qb2+ 30. Kf3 Rd5 31. Qc3 Qb7 32. Kg4 h5+ 33. Kxh5 f6 34. Rxc7 Rxe5+ 35. Qxe5 Qf3+ 36. Kg6 Qd3+ 37. Kh5 fxe5 0-1

[Event "Pan American Junior-ch03"]
[Site "Sao Paulo"]
[Date "1977.12.13"]
[Round "4"]
[White "Cifuentes Parada, Roberto"]
[Black "Vaca Pereira, Jaime"]
[Result "0-1"]
[ECO "A29"]
[WhiteElo "2270"]
[PlyCount "70"]
[EventDate "1977.12.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Be6 7. d3 Be7 8. Bd2 0-0 9. 0-0 Qd7 10. Ng5 Bxg5 11. Bxg5 Nxc3 12. bxc3 Bh3 13. Rb1 Bxg2 14. Kxg2 Qd5+ 15. e4 Qxa2 16. Rxb7 Rfc8 17. Rb5 h6 18. Be3 a5 19. d4 exd4 20. cxd4 a4 21. Qb1 Qxb1 22. Rfxb1 a3 23. Ra1 Ra4 24. d5 Ne5 25. Rc5 Nd7 26. Rc3 a2 27. Rc2 Rxe4 28. Raxa2 Re5 29. d6 c5 30. Ra7 Rd8 31. Rd2 Nf6 32. Rb2 Rd5 33. Rbb7 R5xd6 34. Rxf7 R8d7 35. Bxc5 Kxf7 0-1

[Event "Pan American Junior-ch03"]
[Site "Sao Paulo"]
[Date "1977.12.12"]
[Round "3"]
[White "Vaca Pereira, Jaime"]
[Black "Navarro Segura, Roberto"]
[Result "1-0"]
[ECO "C54"]
[PlyCount "61"]
[EventDate "1977.12.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[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. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. 0-0 Bxc3 9. d5 Bf6 10. Re1 Ne7 11. Rxe4 d6 12. Bg5 Bxg5 13. Nxg5 f6 14. Ne6 Bxe6 15. Rxe6 0-0 16. f4 f5 17. Qd4 Ng6 18. Rae1 a6 19. Be2 Qd7 20. Bd3 Rf7 21. Qb4 Raf8 22. g3 Qc8 23. h4 Rd8 24. h5 Nf8 25. R6e3 Nd7 26. h6 Nf6 27. Qd4 Ng4 28. Bxf5 Nxe3 29. Bxc8 Nc2 30. Qa7 Rxc8 31. Rc1 1-0

[Event "Pan American Junior-ch03"]
[Site "Sao Paulo"]
[Date "1977.12.11"]
[Round "2"]
[White "Hernandez, Hugo"]
[Black "Vaca Pereira, Jaime"]
[Result "1-0"]
[ECO "B84"]
[PlyCount "111"]
[EventDate "1977.12.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. Be3 Be7 8. 0-0 0-0 9. Qe1 b5 10. a3 Bb7 11. Bd3 Nbd7 12. Rd1 Nc5 13. Bc1 Nxd3 14. Rxd3 Qc7 15. Kh1 Rfe8 16. f4 d5 17. e5 Ne4 18. Rff3 Rac8 19. Be3 b4 20. axb4 Bxb4 21. Bd2 Bxc3 22. Bxc3 Nxc3 23. Qxc3 Qb6 24. Qa3 Rc4 25. c3 Rec8 26. h3 g6 27. Rde3 Qc5 28. Qxc5 R4xc5 29. Kh2 Bc6 30. Rf2 Bb5 31. Rc2 Rc4 32. Rd2 Bd7 33. Re1 a5 34. Ra1 a4 35. Kg3 Rb8 36. Kf3 h5 37. g3 Kg7 38. h4 Rc7 39. Ke3 Rcb7 40. Ra2 Rc7 41. Nc2 Rc4 42. Rd4 Rxd4 43. Nxd4 Kf8 44. Kd2 Ke7 45. Kc2 Ra8 46. Ra1 Ra7 47. Kb1 Rb7 48. Ka2 Rb6 49. Rd1 Bc8 50. Rd2 Bd7 51. Ka3 Kd8 52. Nc2 Rb3+ 53. Ka2 Kc7 54. Rd4 Rb6 55. Nb4 Bb5 56. Ka3 1-0

[Event "Pan American Junior-ch03"]
[Site "Sao Paulo"]
[Date "1977.12.10"]
[Round "1"]
[White "Vaca Pereira, Jaime"]
[Black "Masculo, Jose Soares"]
[Result "0-1"]
[ECO "B62"]
[PlyCount "64"]
[EventDate "1977.12.10"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Nxc6 bxc6 8. e5 dxe5 9. Qf3 Be7 10. Bxf6 gxf6 11. Bb5 0-0 12. 0-0 Kh8 13. Bxc6 Rb8 14. Rad1 Qa5 15. Qh5 Ba6 16. Rfe1 Rbd8 17. Rxd8 Qxd8 18. Be4 f5 19. Bd3 Bxd3 20. Re3 Bxc2 21. Rh3 f4 22. Qxe5+ Bf6 23. Qe2 Bf5 24. Rh5 Qd3 25. Qxd3 Bxd3 26. Rc5 Rd8 27. h3 Bg6 28. Rc7 Rd2 29. Rxa7 Rxb2 30. Ra8+ Kg7 31. Ra3 Bd4 32. Kh2 Bxf2 0-1

