[Event "BOL-ch"]
[Site "Santa Cruz"]
[Date "2004.08.16"]
[Round "11"]
[White "Anez, Jorge"]
[Black "Rivas, Oswaldo"]
[Result "1-0"]
[ECO "C56"]
[WhiteElo "2161"]
[BlackElo "2210"]
[PlyCount "79"]
[EventDate "2004.08.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BOL"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. 0-0 Nxe4 6. Re1 d5 7. Bxd5 Qxd5 8. Nc3 Qa5 9. Nxe4 Be6 10. Neg5 0-0-0 11. Nxe6 fxe6 12. Rxe6 Bd6 13. Qe2 Qh5 14. Bd2 g5 15. Bxg5 Rdf8 16. Rh6 Qf7 17. Qe6+ Qxe6 18. Rxe6 Rhg8 19. h4 Kd7 20. Rh6 Rg7 21. Rd1 Re8 22. Kf1 Re4 23. Bf6 Rgg4 24. Rxh7+ Ke6 25. Rh6 Kd5 26. c3 Ref4 27. Nxd4 Bf8 28. Nxc6+ Kxc6 29. Bg7+ Bd6 30. Be5 Rxh4 31. Bxf4 Rxf4 32. Rd4 Rf5 33. g4 Rb5 34. b3 Ra5 35. a4 Rg5 36. Kg2 a5 37. Rh5 Rg7 38. Rxa5 Bc5 39. Rf4 b6 40. Ra8 1-0

[Event "BOL-ch"]
[Site "Santa Cruz"]
[Date "2004.08.15"]
[Round "9"]
[White "Campero, Ronald"]
[Black "Rivas, Oswaldo"]
[Result "1-0"]
[ECO "E92"]
[WhiteElo "2188"]
[BlackElo "2210"]
[PlyCount "65"]
[EventDate "2004.08.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BOL"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. d5 Re8 8. Be3 Na6 9. Nd2 Nd7 10. g4 Ndc5 11. Rg1 Kh8 12. Nf3 c6 13. Qd2 Qa5 14. 0-0-0 cxd5 15. cxd5 Nb4 16. Bc4 b5 17. Bxc5 bxc4 18. Bxb4 Qxb4 19. Kb1 a5 20. Ka1 Rb8 21. h4 h6 22. Rb1 Bd7 23. h5 f5 24. g5 f4 25. gxh6 Bxh6 26. Rxg6 Kh7 27. Rbg1 Rg8 28. Rxg8 Rxg8 29. Rxg8 Kxg8 30. Qd1 Be8 31. Qg1+ Kh8 32. Qg4 Qb7 33. Qe6 1-0

[Event "BOL-ch"]
[Site "Santa Cruz"]
[Date "2004.08.15"]
[Round "10"]
[White "Rivas, Oswaldo"]
[Black "Andrade, Marko"]
[Result "0-1"]
[ECO "B77"]
[WhiteElo "2210"]
[BlackElo "2175"]
[PlyCount "108"]
[EventDate "2004.08.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BOL"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Qd2 0-0 8. f3 Nc6 9. Bc4 Bd7 10. Nxc6 bxc6 11. Bh6 Qa5 12. Bxg7 Kxg7 13. Bb3 Rab8 14. 0-0 h6 15. Rad1 Qg5 16. Qxg5 hxg5 17. e5 Ne8 18. exd6 exd6 19. Ne4 d5 20. Nxg5 Rd8 21. Rfe1 Nc7 22. f4 Rfe8 23. Kf2 Bg4 24. Rd2 Rxe1 25. Kxe1 f6 26. Nf3 Bxf3 27. gxf3 Ne6 28. f5 gxf5 29. Kf2 Rh8 30. Kg3 f4+ 31. Kg2 Ng5 32. Rd3 Re8 33. h4 Ne6 34. Kh3 Kg6 35. Ba4 Rc8 36. b4 a6 37. c4 d4 38. c5 Kf5 39. Bb3 Rg8 40. Bc4 a5 41. a3 axb4 42. axb4 Rd8 43. Ra3 Nc7 44. Ra7 Nd5 45. Bd3+ Ke5 46. Rb7 Rg8 47. Be4 f5 48. Bxd5 Kxd5 49. Rd7+ Kc4 50. b5 cxb5 51. c6 b4 52. h5 Rc8 53. c7 b3 54. Rg7 b2 0-1

[Event "BOL-ch"]
[Site "Santa Cruz"]
[Date "2004.08.14"]
[Round "7"]
[White "Ferrufino, Boris"]
[Black "Rivas, Oswaldo"]
[Result "1-0"]
[ECO "E60"]
[WhiteElo "2231"]
[BlackElo "2210"]
[PlyCount "103"]
[EventDate "2004.08.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BOL"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Nbd2 d5 4. e3 Bg7 5. c4 0-0 6. Bd3 Nc6 7. cxd5 Nxd5 8. Nc4 Ndb4 9. Bb1 Qd5 10. Qe2 Bg4 11. a3 Bxf3 12. gxf3 Na6 13. Be4 Qd7 14. f4 e6 15. b4 Nd8 16. Ne5 Qe8 17. b5 Nb8 18. 0-0 f6 19. Nc4 Qxb5 20. Rb1 Qa6 21. Bd3 b5 22. Nd2 c6 23. Ne4 Nd7 24. Qa2 Qc8 25. Bd2 a5 26. Rfc1 Qb8 27. Be2 Kh8 28. Bf3 Nb6 29. Nc5 Qd6 30. Nxe6 Qxe6 31. Qxe6 Nxe6 32. Rxc6 Nc4 33. Bc1 Rae8 34. Rxb5 Nxd4 35. exd4 Re1+ 36. Kg2 Rxc1 37. Rbc5 Rc3 38. a4 Rxf3 39. Kxf3 Nd2+ 40. Ke3 Nf1+ 41. Kd3 Nxh2 42. d5 Ng4 43. f3 Nh6 44. d6 f5 45. d7 Nf7 46. Rxa5 Rd8 47. Rd5 Kg8 48. a5 Kf8 49. Re6 Ra8 50. Re8+ Rxe8 51. dxe8Q+ Kxe8 52. a6 1-0

[Event "BOL-ch"]
[Site "Santa Cruz"]
[Date "2004.08.14"]
[Round "8"]
[White "Rivas, Oswaldo"]
[Black "Sustach, Marcos Antonio"]
[Result "1/2-1/2"]
[ECO "B41"]
[WhiteElo "2210"]
[BlackElo "2303"]
[PlyCount "101"]
[EventDate "2004.08.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BOL"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 d6 7. Be2 Be7 8. 0-0 0-0 9. Be3 Qc7 10. f4 b6 11. Rc1 Bb7 12. Bf3 Nbd7 13. Kh1 Rfe8 14. Bf2 e5 15. Nd5 Bxd5 16. cxd5 Qb7 17. fxe5 Nxe5 18. Nc6 Nfd7 19. Nxe7+ Rxe7 20. Bg3 a5 21. b3 b5 22. Bf2 Nxf3 23. gxf3 f5 24. Bg3 Ne5 25. exf5 Rf7 26. f4 Nd7 27. Rc6 Rxf5 28. Qg4 Raf8 29. Re1 Nb6 30. Rxd6 Nxd5 31. Qf3 Qf7 32. Rd1 Nxf4 33. Bxf4 Rxf4 34. Qd5 Qxd5+ 35. R6xd5 R4f5 36. R1d2 h5 37. Rxf5 Rxf5 38. Kg2 g5 39. Rd7 b4 40. Ra7 Kf8 41. Kg3 Ke8 42. Kg2 Kd8 43. Rh7 g4 44. Kg3 Rf3+ 45. Kg2 Rf5 46. Kg3 Rf3+ 47. Kg2 Rf5 48. Kg3 Kc8 49. Ra7 Kb8 50. Rh7 Rf3+ 51. Kg2 1/2-1/2

[Event "BOL-ch"]
[Site "Santa Cruz"]
[Date "2004.08.13"]
[Round "5"]
[White "Monroy Carrizo, Javier"]
[Black "Rivas, Oswaldo"]
[Result "1/2-1/2"]
[ECO "C22"]
[WhiteElo "2129"]
[BlackElo "2210"]
[PlyCount "87"]
[EventDate "2004.08.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BOL"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Nf6 5. Nc3 Bb4 6. Bd2 Qe7 7. 0-0-0 d6 8. Qg5 Rg8 9. Bb5 Bd7 10. Nge2 0-0-0 11. Ng3 Qe5 12. f4 Qxg5 13. fxg5 Ng4 14. Rdf1 Nge5 15. a3 Ba5 16. b4 Bb6 17. Nd5 Rde8 18. Bc3 Rgf8 19. h4 Bd4 20. Bxd4 Nxd4 21. Bxd7+ Nxd7 22. h5 c6 23. Ne3 g6 24. hxg6 hxg6 25. Nc4 Kc7 26. Rd1 b5 27. Nxd6 Kxd6 28. Rxd4+ Kc7 29. Rhd1 Nb6 30. e5 Rxe5 31. Ne4 Rfe8 32. Nd6 R8e7 33. Rf1 Rxg5 34. Rxf7 Rxf7 35. Nxf7 Rxg2 36. Nd6 Nd5 37. Ne4 Ne3 38. Nc5 Rg1+ 39. Kb2 Nd5 40. Rh4 Kd6 41. Rh7 Ne7 42. Nb7+ Ke6 43. Nd8+ Kd6 44. Nb7+ 1/2-1/2

[Event "BOL-ch"]
[Site "Santa Cruz"]
[Date "2004.08.13"]
[Round "6"]
[White "Rivas, Oswaldo"]
[Black "Calle, Julio"]
[Result "1-0"]
[ECO "B09"]
[WhiteElo "2210"]
[PlyCount "61"]
[EventDate "2004.08.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BOL"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. e4 d6 2. d4 g6 3. f4 Bg7 4. Nf3 Nf6 5. Nc3 c5 6. e5 Nfd7 7. exd6 exd6 8. Qe2+ Kf8 9. Be3 Qa5 10. Qb5 Nc6 11. 0-0-0 a6 12. Qxa5 Nxa5 13. Ne4 cxd4 14. Bxd4 Bxd4 15. Rxd4 Nc5 16. Nxd6 Ne6 17. Rd5 Nc6 18. g3 Nb4 19. Rd2 Nxa2+ 20. Kb1 Nb4 21. Ne5 Nd8 22. Nec4 Be6 23. Nb6 Rb8 24. c3 Nbc6 25. f5 gxf5 26. Bh3 Ne7 27. Rf1 Kg7 28. Nxf5+ Nxf5 29. Bxf5 Re8 30. Rf4 Nc6 31. Nd7 1-0

[Event "BOL-ch"]
[Site "Santa Cruz"]
[Date "2004.08.12"]
[Round "3"]
[White "Patino, Vladimir"]
[Black "Rivas, Oswaldo"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "2120"]
[BlackElo "2210"]
[PlyCount "38"]
[EventDate "2004.08.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BOL"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. f3 0-0 8. Be2 d5 9. 0-0 Qg6 10. Nd2 Bb6 11. Kh1 Ne5 12. Bf4 f6 13. b4 Kh8 14. a4 c6 15. Qc2 Bd7 16. a5 Bc7 17. c4 dxc4 18. Nxc4 Nxc4 19. Bxc7 Ne3 0-1

[Event "BOL-ch"]
[Site "Santa Cruz"]
[Date "2004.08.12"]
[Round "4"]
[White "Rivas, Oswaldo"]
[Black "Cruz Condori, Alfredo"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "2210"]
[BlackElo "2179"]
[PlyCount "123"]
[EventDate "2004.08.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BOL"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Nxe7 Nxe7 11. Bxf6 gxf6 12. c4 Bb7 13. Bd3 bxc4 14. Nxc4 d5 15. exd5 Qxd5 16. Ne3 Qa5+ 17. Qd2 Qxd2+ 18. Kxd2 0-0-0 19. Ke2 Kb8 20. Rhd1 h5 21. Bc4 f5 22. Rxd8+ Rxd8 23. Rd1 Rxd1 24. Nxd1 f6 25. g3 Nc6 26. Ke3 Nd4 27. Nc3 Nc2+ 28. Kd2 Nd4 29. Nd5 Nf3+ 30. Ke3 Nxh2 31. Nxf6 Ng4+ 32. Nxg4 hxg4 33. b4 Ka7 34. a4 Bc6 35. Be6 Be4 36. Kd2 a5 37. Kc3 Kb6 38. Kc4 Bc2 39. bxa5+ Kxa5 40. Kd5 f4 41. Kxe5 fxg3 42. fxg3 Kb6 43. Bd7 Bb3 44. Kf4 Bd1 45. Bxg4 Bxa4 46. Bf3 Bd7 47. Be4 Kc7 48. Bf5 Be8 49. g4 Kd6 50. Kg5 Ke7 51. Kh6 Bf7 52. Kg7 Bd5 53. g5 Bf3 54. Kh6 Bd5 55. g6 Bf7 56. g7 Bg8 57. Kg6 Kd6 58. Kf6 Bb3 59. Bg6 Bg8 60. Bf7 Bh7 61. Kg5 Ke7 62. Kh6 1-0

[Event "BOL-ch"]
[Site "Santa Cruz"]
[Date "2004.08.11"]
[Round "2"]
[White "Rivas, Oswaldo"]
[Black "Saavedra, Carlos"]
[Result "1-0"]
[ECO "B99"]
[WhiteElo "2210"]
[BlackElo "2319"]
[PlyCount "67"]
[EventDate "2004.08.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BOL"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Nbd7 8. Qf3 Qc7 9. 0-0-0 Be7 10. Be2 b5 11. Bxf6 gxf6 12. Qh5 Nb6 13. f5 e5 14. Ne6 Bxe6 15. fxe6 0-0-0 16. exf7 Kb8 17. Nd5 Nxd5 18. Rxd5 Rc8 19. Bd3 Qd7 20. Kb1 Bd8 21. Rf1 Qe7 22. a4 bxa4 23. Bxa6 Rc7 24. Qe2 Qd7 25. Rb5+ Ka7 26. Ra5 Kb8 27. Bc4 Be7 28. Bd5 Ra7 29. Rb5+ Kc8 30. Rf3 Rc7 31. Ra3 Rc5 32. Rxc5+ dxc5 33. Qa6+ Kc7 34. Qa5+ 1-0

[Event "BOL-ch"]
[Site "Santa Cruz"]
[Date "2004.08.11"]
[Round "1"]
[White "Roldan, Rodrigo"]
[Black "Rivas, Oswaldo"]
[Result "1/2-1/2"]
[ECO "C90"]
[WhiteElo "2194"]
[BlackElo "2210"]
[PlyCount "63"]
[EventDate "2004.08.11"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BOL"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bc4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. h3 Na5 9. c3 Nxb3 10. axb3 0-0 11. d4 Bb7 12. d5 c6 13. c4 cxd5 14. cxd5 Nd7 15. b4 f5 16. exf5 Rxf5 17. Nc3 Rc8 18. Nd2 Nb6 19. Nb3 Nc4 20. Na5 Nxa5 21. bxa5 Rc4 22. Re4 Rxe4 23. Nxe4 Qa8 24. Qc2 Rf7 25. Ng5 Bxg5 26. Bxg5 Bxd5 27. f3 Qa7+ 28. Qf2 Qxf2+ 29. Kxf2 Rd7 30. Be3 Bc4 31. Re1 Kf7 32. Bd2 1/2-1/2

[Event "Santa Cruz op"]
[Site "Santa Cruz"]
[Date "2003.08.09"]
[Round "8"]
[White "Paredes, Humberto"]
[Black "Rivas, Oswaldo"]
[Result "0-1"]
[ECO "E65"]
[BlackElo "2210"]
[PlyCount "56"]
[EventDate "2003.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BOL"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. g3 c5 4. Bg2 Nc6 5. Nf3 Bg7 6. d4 cxd4 7. Nxd4 0-0 8. 0-0 Ne5 9. b3 d6 10. Bb2 Rb8 11. Rc1 Bd7 12. Qc2 Qc8 13. Rfd1 Bh3 14. Bh1 Bh6 15. e3 Neg4 16. Qe2 Nxf2 17. Kxf2 Ng4+ 18. Ke1 Nxe3 19. Nd5 Nxd5 20. Bxd5 e5 21. Nf3 Qc5 22. Rc2 Rbe8 23. Bc1 e4 24. Nd4 e3 25. Bxb7 Bg7 26. a3 a5 27. Rd3 Re5 28. Kd1 Rfe8 0-1

[Event "Santa Cruz op"]
[Site "Santa Cruz"]
[Date "2003.08.09"]
[Round "9"]
[White "Rivas, Oswaldo"]
[Black "Chavez, Carlos"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "2210"]
[PlyCount "53"]
[EventDate "2003.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BOL"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Qc7 6. Nf3 Bg4 7. 0-0 Nf6 8. h3 Bh5 9. Re1 e6 10. Bg5 Bd6 11. Nbd2 h6 12. Bxf6 gxf6 13. Qa4 Bf4 14. Kh1 Bxd2 15. Nxd2 Qf4 16. Ne4 Rg8 17. Ng3 Qxf2 18. Bb5 Rc8 19. Bxc6+ bxc6 20. Rf1 Qxg3 21. Qc2 Bg6 22. Qf2 Be4 23. Qxg3 Rxg3 24. Rf2 Rxh3+ 25. Kg1 Rd3 26. Kh2 Rb8 27. b3 0-1

[Event "Santa Cruz op"]
[Site "Santa Cruz"]
[Date "2003.08.07"]
[Round "4"]
[White "Rivas, Oswaldo"]
[Black "Castillo, Ruben"]
[Result "0-1"]
[ECO "B18"]
[WhiteElo "2210"]
[PlyCount "124"]
[EventDate "2003.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BOL"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Bc4 e6 7. N1e2 Qb6 8. Bb3 Nf6 9. Be3 Nd5 10. Bd2 a5 11. a4 Nd7 12. 0-0 Qc7 13. c4 Nb4 14. Nf4 Bd6 15. Qf3 c5 16. Ne4 Bxe4 17. Qxe4 Nf6 18. Qf3 cxd4 19. c5 Bxf4 20. Bxf4 Qc6 21. Bd6 Qxf3 22. gxf3 Kd7 23. Rfd1 Nc6 24. Bc4 Ne8 25. Bb5 Nxd6 26. Rxd4 Kc7 27. Rxd6 Rad8 28. Rad1 Rxd6 29. cxd6+ Kb6 30. f4 Rd8 31. Kg2 Kc5 32. d7 Kb6 33. Kf3 Kc7 34. Ke4 Rxd7 35. Rxd7+ Kxd7 36. f5 exf5+ 37. Kxf5 Kd6 38. Bc4 f6 39. f4 Ne7+ 40. Kg4 Kc5 41. b3 g6 42. Be6 Kb4 43. h3 Kc3 44. h4 Nc6 45. h5 Nd4 46. Bg8 gxh5+ 47. Kxh5 Nxb3 48. Bxh7 Nc5 49. Kg6 Nxa4 50. Kxf6 Nc5 51. Ke7 a4 52. Bb1 a3 53. f5 Ne4 54. Ke6 Kb2 55. Bxe4 a2 56. f6 a1Q 57. f7 Qa6+ 58. Ke7 Qa3+ 59. Kd7 Qf8 60. Ke6 b5 61. Bd5 b4 62. Kd7 b3 0-1

[Event "Santa Cruz op"]
[Site "Santa Cruz"]
[Date "2003.08.06"]
[Round "2"]
[White "Rivas, Oswaldo"]
[Black "Mattes del Castillo, Addy"]
[Result "1-0"]
[ECO "B46"]
[WhiteElo "2210"]
[PlyCount "59"]
[EventDate "2003.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BOL"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 a6 6. Be3 Bb4 7. a3 Bxc3+ 8. bxc3 Nf6 9. Nxc6 bxc6 10. e5 Nd5 11. Bc5 Qa5 12. Qd4 Qxc3+ 13. Qxc3 Nxc3 14. Bd3 f6 15. f4 a5 16. Kd2 Nd5 17. g3 Kf7 18. c4 Ne7 19. Rab1 Ba6 20. Bxe7 Kxe7 21. c5 Bxd3 22. Kxd3 fxe5 23. fxe5 Rhf8 24. Ke4 Rab8 25. Rb6 Rxb6 26. cxb6 c5 27. Ke3 d5 28. exd6+ Kxd6 29. Ke4 Kc6 30. Rb1 1-0

[Event "Santa Cruz op"]
[Site "Santa Cruz"]
[Date "2003.08.05"]
[Round "1"]
[White "Duran, Israel"]
[Black "Rivas, Oswaldo"]
[Result "1-0"]
[ECO "B01"]
[BlackElo "2210"]
[PlyCount "85"]
[EventDate "2003.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BOL"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 c6 5. Bc4 Nf6 6. Bd2 Qc7 7. Be3 Bg4 8. Qd2 e6 9. f3 Bf5 10. Nge2 Nbd7 11. Ng3 Bg6 12. Nge4 Bb4 13. a3 Qa5 14. Bd3 Nxe4 15. fxe4 Nf6 16. e5 Nd5 17. 0-0 Bxc3 18. bxc3 Qxc3 19. Bxg6 hxg6 20. Qxc3 Nxc3 21. Rf2 0-0 22. Raf1 Rad8 23. Rf3 Ne2+ 24. Kh1 Nxd4 25. Rf4 Ne2 26. R4f2 Nc3 27. Bxa7 Rd5 28. h3 Nb5 29. c4 Nxa7 30. cxd5 cxd5 31. Rb1 Nc6 32. Rfb2 Ra8 33. Rxb7 Rxa3 34. Rc7 Nxe5 35. Rc8+ Kh7 36. Rbb8 g5 37. Rh8+ Kg6 38. h4 Ng4 39. h5+ Kf5 40. Rb1 Kf4 41. Rf1+ Kg3 42. Rh7 Ra2 43. Rf3+ 1-0

[Event "Mar del Plata op 34th"]
[Site "Mar del Plata"]
[Date "2003.04.14"]
[Round "4"]
[White "Moreda, Lucas"]
[Black "Rivas, Oswaldo"]
[Result "1-0"]
[ECO "C26"]
[WhiteElo "2329"]
[BlackElo "2261"]
[PlyCount "51"]
[EventDate "2003.04.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "CBM 093 Extra"]
[Source "ChessBase"]
[SourceDate "2003.05.09"]
[SourceVersion "1"]
[SourceVersionDate "2003.05.09"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nc6 3. g3 Nf6 4. Bg2 a6 5. Nge2 Bc5 6. 0-0 d6 7. d3 Be6 8. Nd5 h6 9. c3 Bxd5 10. exd5 Ne7 11. d4 exd4 12. Nxd4 0-0 13. b4 Ba7 14. c4 b5 15. cxb5 axb5 16. Nxb5 Bb6 17. Bb2 Qd7 18. Bxf6 gxf6 19. a4 Rfd8 20. Qh5 Qf5 21. Qxf5 Nxf5 22. Rfd1 Rab8 23. Bf1 Rb7 24. a5 Bxf2+ 25. Kxf2 Rbb8 26. a6 1-0

[Event "Sao Paulo-ch fin"]
[Site "Serra Negra"]
[Date "2002.??.??"]
[Round "?"]
[White "Delai, Paula Fernanda"]
[Black "Rivas, Oswaldo"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "2014"]
[BlackElo "2206"]
[PlyCount "121"]
[EventDate "2002.05.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 088 Extra"]
[Source "ChessBase"]
[SourceDate "2002.07.01"]
[SourceVersion "2"]
[SourceVersionDate "2002.07.01"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 c6 5. Nf3 Bg4 6. h3 Bxf3 7. Qxf3 e6 8. Bd2 Qc7 9. 0-0-0 Nf6 10. Kb1 Nbd7 11. g4 h6 12. h4 Nd5 13. Nxd5 cxd5 14. Bd3 g6 15. Rhe1 Be7 16. Rc1 Qc6 17. h5 g5 18. c4 dxc4 19. Qxc6 bxc6 20. Rxc4 Nf6 21. f3 Kd7 22. Rec1 Rhc8 23. Ba5 Nd5 24. Be4 Bd6 25. Bd2 Rab8 26. Ra4 Rb7 27. Bd3 Rcb8 28. b3 Nb6 29. Ra5 Nd5 30. Ba6 Rc7 31. Ra4 Bf4 32. Bxf4 Nxf4 33. Rc5 Nd5 34. Bd3 Kd6 35. Rc1 Rb4 36. Rxb4 Nxb4 37. Be4 Nd5 38. Bxd5 Kxd5 39. Re1 f5 40. Kc2 fxg4 41. fxg4 Rf7 42. Re2 Rf4 43. Re5+ Kd6 44. Ra5 Rxg4 45. Rxa7 Rh4 46. a4 Rxh5 47. a5 Rh2+ 48. Kd3 e5 49. dxe5+ Kxe5 50. a6 Ra2 51. Ra8 Kf4 52. a7 Kg4 53. Rh8 Rxa7 54. Rxh6 Rb7 55. Rxc6 Rxb3+ 56. Kd2 Rf3 57. Rc4+ Kg3 58. Rc8 g4 59. Rh8 Kg2 60. Re8 Kg1 61. Ke2 0-1

[Event "Sao Paulo-ch fin"]
[Site "Serra Negra"]
[Date "2002.??.??"]
[Round "?"]
[White "Rivas, Oswaldo"]
[Black "Aranha Filho, Alvaro Zimmermann"]
[Result "1-0"]
[ECO "B28"]
[WhiteElo "2206"]
[BlackElo "2288"]
[PlyCount "51"]
[EventDate "2002.05.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 088 Extra"]
[Source "ChessBase"]
[SourceDate "2002.07.01"]
[SourceVersion "2"]
[SourceVersionDate "2002.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 a6 3. h3 Nf6 4. Nc3 d5 5. exd5 Nxd5 6. Ne4 e6 7. d4 cxd4 8. Nxd4 Be7 9. Be2 0-0 10. 0-0 e5 11. Nf3 Nc6 12. Bc4 Nb6 13. Qxd8 Rxd8 14. Bb3 h6 15. Be3 Nd5 16. Bc5 Bxc5 17. Nxc5 Nf4 18. Rfe1 Re8 19. Rad1 Ne6 20. Nxe5 Ncd4 21. Rxd4 Nxd4 22. Bxf7+ Kf8 23. Bxe8 Nxc2 24. Ned7+ Kg8 25. Re7 b6 26. Bf7+ 1-0

[Event "Sao Paulo-ch fin"]
[Site "Serra Negra"]
[Date "2002.??.??"]
[Round "?"]
[White "Rivas, Oswaldo"]
[Black "Capelari, Marcos"]
[Result "0-1"]
[ECO "C43"]
[WhiteElo "2206"]
[PlyCount "58"]
[EventDate "2002.05.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 088 Extra"]
[Source "ChessBase"]
[SourceDate "2002.07.01"]
[SourceVersion "2"]
[SourceVersionDate "2002.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 d5 5. dxe5 Nc6 6. 0-0 Bf5 7. c4 Bc5 8. cxd5 Qxd5 9. Bxe4 Qxe4 10. Nc3 Qg4 11. Nb5 0-0 12. Be3 Rad8 13. Qc1 Bxe3 14. Qxe3 Bd3 15. Nxc7 Bxf1 16. Rxf1 Rd7 17. Nb5 Qc4 18. Nd6 Qd5 19. Ng5 Nxe5 20. Qh3 h6 21. Nde4 Rfd8 22. Nc3 Qd3 23. Qxd3 Nxd3 24. Nf3 Nxb2 25. Rb1 Na4 26. h3 Nxc3 27. Rb3 Nxa2 28. Ra3 Nc1 29. Rxa7 b5 0-1

[Event "Sao Paulo-ch fin"]
[Site "Serra Negra"]
[Date "2002.??.??"]
[Round "?"]
[White "Rivas, Oswaldo"]
[Black "Pelikian, Jefferson"]
[Result "0-1"]
[ECO "B73"]
[WhiteElo "2206"]
[BlackElo "2403"]
[PlyCount "98"]
[EventDate "2002.05.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 088 Extra"]
[Source "ChessBase"]
[SourceDate "2002.07.01"]
[SourceVersion "2"]
[SourceVersionDate "2002.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 Bg7 7. Be3 0-0 8. 0-0 Nc6 9. h3 Bd7 10. Qd2 Rc8 11. Nxc6 Bxc6 12. Bf3 Re8 13. Rfd1 a6 14. a3 Nd7 15. Bd4 Ne5 16. Be2 b5 17. b3 Qc7 18. Qe3 Bb7 19. Rac1 e6 20. a4 bxa4 21. Nxa4 Qc6 22. f3 f5 23. exf5 exf5 24. Qd2 Rcd8 25. Kh1 h5 26. c4 Kh7 27. Rc2 Bh6 28. Qc3 Nd7 29. Bf2 Re6 30. Bf1 Rde8 31. Qb4 Ne5 32. Rc3 g5 33. Nb6 g4 34. Nd5 gxf3 35. gxf3 Bg7 36. Bg2 Ng6 37. Re3 Ba8 38. Rxe6 Rxe6 39. Re1 Rxe1+ 40. Qxe1 Qb7 41. Qb1 Qf7 42. f4 Bxd5 43. Bxd5 Qf6 44. Bg3 Bh6 45. Qg1 h4 46. Bh2 Qc3 47. Qa7+ Bg7 48. Bg2 Qxb3 49. Qxa6 Qd1+ 0-1

[Event "Sao Paulo-ch fin"]
[Site "Serra Negra"]
[Date "2002.??.??"]
[Round "?"]
[White "Rivas, Oswaldo"]
[Black "Salvi, Ricardo Wilson"]
[Result "1/2-1/2"]
[ECO "B12"]
[WhiteElo "2206"]
[PlyCount "66"]
[EventDate "2002.05.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 088 Extra"]
[Source "ChessBase"]
[SourceDate "2002.07.01"]
[SourceVersion "2"]
[SourceVersionDate "2002.07.01"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. g4 Bd7 5. f4 e6 6. Nf3 c5 7. c3 Nc6 8. Be3 Qb6 9. Qb3 Nh6 10. h3 Be7 11. Nbd2 cxd4 12. Qxb6 axb6 13. Nxd4 Nxd4 14. Bxd4 Bc5 15. Nb3 Bxd4 16. Nxd4 f6 17. Bb5 Ke7 18. Bxd7 Kxd7 19. 0-0 fxe5 20. fxe5 Rhf8 21. a3 Nf7 22. Nf3 Ke7 23. Rae1 Nd8 24. Ng5 h6 25. Rxf8 Kxf8 26. Nf3 Nc6 27. Kf2 Ra4 28. Re3 Ke7 29. Kg3 Re4 30. Kf2 Rf4 31. Ke2 g5 32. Rd3 Re4+ 33. Re3 Rf4 1/2-1/2

[Event "Sao Paulo-ch fin"]
[Site "Serra Negra"]
[Date "2002.??.??"]
[Round "?"]
[White "Rouanet, Luiz Paulo"]
[Black "Rivas, Oswaldo"]
[Result "0-1"]
[ECO "D53"]
[WhiteElo "2017"]
[BlackElo "2206"]
[PlyCount "94"]
[EventDate "2002.05.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 088 Extra"]
[Source "ChessBase"]
[SourceDate "2002.07.01"]
[SourceVersion "2"]
[SourceVersionDate "2002.07.01"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 h6 6. Bxf6 Bxf6 7. cxd5 exd5 8. Qb3 c6 9. e3 Qb6 10. Bd3 Bg4 11. Nd2 Nd7 12. 0-0 Qxb3 13. Nxb3 0-0 14. h3 Be6 15. f4 Nb6 16. f5 Bc8 17. e4 dxe4 18. Nxe4 Nd5 19. Nxf6+ Nxf6 20. g4 b6 21. Rfe1 a5 22. a4 Bd7 23. Re7 Rfe8 24. Rae1 Rxe7 25. Rxe7 Kf8 26. Re5 Nd5 27. Kh2 f6 28. Re1 Re8 29. Rxe8+ Bxe8 30. Nd2 Ke7 31. Kg3 Kd6 32. Nc4+ Kc7 33. Be4 Bf7 34. Bxd5 Bxd5 35. Nd2 b5 36. axb5 cxb5 37. Kf4 a4 38. h4 b4 39. Nb1 Kd6 40. Ke3 Ba2 41. Nd2 Bd5 42. Nb1 Kc6 43. Kf4 Kb5 44. g5 hxg5+ 45. hxg5 Kc4 46. gxf6 gxf6 47. Ke3 Kb3 0-1

[Event "Sao Paulo-ch fin"]
[Site "Serra Negra"]
[Date "2002.??.??"]
[Round "?"]
[White "Sega, Carlos Alberto"]
[Black "Rivas, Oswaldo"]
[Result "1/2-1/2"]
[ECO "A65"]
[WhiteElo "2326"]
[BlackElo "2206"]
[PlyCount "65"]
[EventDate "2002.05.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 088 Extra"]
[Source "ChessBase"]
[SourceDate "2002.07.01"]
[SourceVersion "2"]
[SourceVersionDate "2002.07.01"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e6 3. e4 d6 4. d4 Be7 5. f4 c5 6. d5 0-0 7. Nf3 exd5 8. cxd5 Re8 9. Be2 Bf8 10. e5 dxe5 11. fxe5 Ng4 12. Bf4 Nd7 13. e6 fxe6 14. Ng5 e5 15. Bxg4 exf4+ 16. Be6+ Rxe6+ 17. dxe6 Qxg5 18. exd7 Qxg2 19. Rf1 Bxd7 20. Qxd7 Qxb2 21. Rd1 Qxc3+ 22. Rd2 c4 23. Kd1 f3 24. Qd5+ Kh8 25. Rxf3 Qa1+ 26. Ke2 Re8+ 27. Re3 Rxe3+ 28. Kxe3 Qg1+ 29. Rf2 Be7 30. Qxc4 h6 31. Qc8+ Kh7 32. Qf5+ Kh8 33. Qc8+ 1/2-1/2

[Event "Sao Paulo-ch fin"]
[Site "Serra Negra"]
[Date "2002.??.??"]
[Round "?"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Rivas, Oswaldo"]
[Result "1/2-1/2"]
[ECO "C91"]
[WhiteElo "2362"]
[BlackElo "2206"]
[PlyCount "31"]
[EventDate "2002.05.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "CBM 088 Extra"]
[Source "ChessBase"]
[SourceDate "2002.07.01"]
[SourceVersion "2"]
[SourceVersionDate "2002.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. d4 h6 10. Nbd2 Re8 11. Nf1 Bf8 12. Ng3 g6 13. a4 Bd7 14. d5 Na5 15. Ba2 c6 16. axb5 1/2-1/2

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.07"]
[Round "12.3"]
[White "Rivas, Oswaldo"]
[Black "Bogda, Alejandro"]
[Result "0-1"]
[ECO "D03"]
[PlyCount "62"]
[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 "Bolivia"]
[BlackTeam "Paraguay"]
[WhiteTeamCountry "BOL"]
[BlackTeamCountry "PAR"]

1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 d5 5. e3 0-0 6. Bd3 Nbd7 7. 0-0 Re8 8. Bf4 Nh5 9. g4 Nxf4 10. exf4 Nf8 11. f5 Qd6 12. c3 Qf4 13. Nh4 gxf5 14. Bxf5 Bxf5 15. Nxf5 e5 16. Nxg7 Kxg7 17. dxe5 Ng6 18. Nf3 Rad8 19. Re1 c5 20. h3 d4 21. cxd4 cxd4 22. Kg2 d3 23. Qd2 Nh4+ 24. Kf1 Qxf3 25. Qg5+ Kf8 26. Qh6+ Kg8 27. Qg5+ Ng6 28. Kg1 d2 29. Red1 Rd3 30. Rxd2 Rxd2 31. Qxd2 Nf4 0-1

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.06"]
[Round "11.3"]
[White "Rivas, Oswaldo"]
[Black "Rivera, Louie"]
[Result "1-0"]
[ECO "D03"]
[PlyCount "91"]
[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 "Bolivia"]
[BlackTeam "Honduras"]
[WhiteTeamCountry "BOL"]
[BlackTeamCountry "HON"]

1. d4 Nf6 2. Nf3 d5 3. Bg5 e6 4. e3 Nbd7 5. Bd3 Bd6 6. Nbd2 h6 7. Bh4 c6 8. e4 dxe4 9. Nxe4 Qa5+ 10. Qd2 Qxd2+ 11. Nfxd2 Be7 12. Bg3 0-0 13. 0-0 Nh5 14. Bc7 b6 15. Be2 Nhf6 16. Bf3 Ba6 17. Rfe1 Rac8 18. Bg3 Nxe4 19. Nxe4 Nf6 20. Nd6 Rcd8 21. Nf5 Bb4 22. c3 exf5 23. cxb4 Nd5 24. Bxd5 Rxd5 25. Re7 Rxd4 26. Rxa7 Rfd8 27. h3 f4 28. Bh4 Rd1+ 29. Rxd1 Rxd1+ 30. Kh2 Be2 31. Ra8+ Kh7 32. Bd8 b5 33. Bb6 Bc4 34. b3 Bd5 35. Bc5 g5 36. a4 h5 37. a5 h4 38. a6 f3 39. g4 hxg3+ 40. Kxg3 Re1 41. a7 f5 42. Rd8 Be4 43. Rd6 Rg1+ 44. Kh2 Rg2+ 45. Kh1 Rg3 46. a8Q 1-0

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.03"]
[Round "9.3"]
[White "Rivas, Oswaldo"]
[Black "Philippe, Georges"]
[Result "0-1"]
[ECO "D02"]
[PlyCount "64"]
[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 "Bolivia"]
[BlackTeam "Luxembourg"]
[WhiteTeamCountry "BOL"]
[BlackTeamCountry "LUX"]

1. d4 e6 2. Nf3 d5 3. Bg5 Be7 4. Bxe7 Nxe7 5. e3 0-0 6. Bd3 c5 7. c3 b6 8. Qe2 h6 9. Nbd2 Bb7 10. Ne5 Nd7 11. f4 f6 12. Nxd7 Qxd7 13. Nf3 Nc6 14. 0-0-0 Qc7 15. Bb1 e5 16. fxe5 fxe5 17. dxe5 Nxe5 18. Qc2 Rf6 19. Qh7+ Kf8 20. Rhf1 Nxf3 21. Rxf3 Rxf3 22. gxf3 Qe5 23. Bf5 Qxe3+ 24. Kb1 d4 25. Bg6 Qe5 26. f4 Qf6 27. Re1 Bd5 28. Re5 Bg8 29. Rf5 Qxf5+ 30. Bxf5 Bxh7 31. Bxh7 dxc3 32. bxc3 Re8 0-1

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.02"]
[Round "8.3"]
[White "Rivas, Oswaldo"]
[Black "Kanko, Ilkka"]
[Result "1/2-1/2"]
[ECO "E91"]
[PlyCount "33"]
[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 "Bolivia"]
[BlackTeam "Finland"]
[WhiteTeamCountry "BOL"]
[BlackTeamCountry "FIN"]

1. d4 Nf6 2. Nf3 g6 3. c4 c5 4. d5 Bg7 5. Nc3 0-0 6. e4 d6 7. Be2 Na6 8. 0-0 Nc7 9. Ne1 e6 10. Be3 Re8 11. Qd2 exd5 12. exd5 Bg4 13. Nf3 Qd7 14. a3 Bxf3 15. Bxf3 b5 16. cxb5 Nxb5 17. Qc2 1/2-1/2

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.01"]
[Round "7.3"]
[White "Earle, M."]
[Black "Rivas, Oswaldo"]
[Result "1/2-1/2"]
[ECO "C95"]
[PlyCount "44"]
[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 "Papua New Guinea"]
[BlackTeam "Bolivia"]
[WhiteTeamCountry "PNG"]
[BlackTeamCountry "BOL"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. h3 0-0 9. c3 Nb8 10. d4 Nbd7 11. Nbd2 c5 12. Nf1 c4 13. Bc2 Re8 14. Ng3 g6 15. Nh2 Bf8 16. Ng4 Nxg4 17. hxg4 Qh4 18. g5 h6 19. Qd2 hxg5 20. Qxg5 Qxg5 21. Bxg5 Bg7 22. Be3 Bb7 1/2-1/2

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.10.30"]
[Round "5.4"]
[White "Tjinkamjet, A."]
[Black "Rivas, Oswaldo"]
[Result "0-1"]
[ECO "A52"]
[PlyCount "56"]
[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 "Netherlands Antilles"]
[BlackTeam "Bolivia"]
[WhiteTeamCountry "AHO"]
[BlackTeamCountry "BOL"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e6 dxe6 5. Qxd8+ Kxd8 6. a3 Bd6 7. Nf3 Nc6 8. e3 Nce5 9. Nbd2 b6 10. Be2 Bb7 11. h3 Nxf3+ 12. Bxf3 Bxf3 13. Nxf3 Ne5 14. Nxe5 Bxe5 15. 0-0 Ke7 16. f4 Bf6 17. Rb1 Rhd8 18. Rf2 Rd1+ 19. Kh2 Rad8 20. Re2 Rf1 21. Kg3 Rdd1 22. Rc2 h5 23. e4 h4+ 24. Kg4 Kf8 25. e5 Be7 26. b4 Rd3 27. c5 g6 28. Be3 Rxe3 0-1

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.10.28"]
[Round "4.3"]
[White "Seret, Jean Luc"]
[Black "Rivas, Oswaldo"]
[Result "1-0"]
[ECO "C68"]
[WhiteElo "2410"]
[PlyCount "82"]
[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 "Bolivia"]
[WhiteTeamCountry "FRA"]
[BlackTeamCountry "BOL"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 Bg4 6. h3 Bxf3 7. Qxf3 Bc5 8. d3 Ne7 9. Nd2 0-0 10. Nc4 Ng6 11. Ne3 Bb6 12. Qg4 Qh4 13. Qxh4 Nxh4 14. Nc4 Ng6 15. Nxb6 cxb6 16. Be3 b5 17. Rad1 Rfd8 18. g3 Nf8 19. Kg2 f6 20. f4 Ne6 21. fxe5 fxe5 22. Rf5 Nd4 23. Bxd4 exd4 24. Rdf1 Rf8 25. Rxf8+ Rxf8 26. Rxf8+ Kxf8 27. Kf3 Ke7 28. Kf4 Ke6 29. h4 b4 30. b3 a5 31. Kg5 Ke5 32. Kg4 b5 33. Kg5 a4 34. Kg4 c5 35. Kg5 Ke6 36. Kf4 Kf6 37. e5+ Ke6 38. Ke4 g6 39. Kf4 h6 40. Ke4 g5 41. h5 g4 1-0

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.10.27"]
[Round "3.3"]
[White "Gonzalez, L."]
[Black "Rivas, Oswaldo"]
[Result "0-1"]
[ECO "C91"]
[PlyCount "63"]
[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 "Dominican Rep"]
[BlackTeam "Bolivia"]
[WhiteTeamCountry "DOM"]
[BlackTeamCountry "BOL"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. c3 d6 9. d4 Bg4 10. d5 Na5 11. Bc2 Rc8 12. Nbd2 c6 13. h3 Bh5 14. Nf1 Qb6 15. g4 Bg6 16. Be3 Qb7 17. dxc6 Qxc6 18. Ng3 Nc4 19. Bc1 Bd8 20. Nf5 Bxf5 21. exf5 Bb6 22. g5 Nh5 23. Nd4 exd4 24. Qxh5 Rfe8 25. Bf4 d3 26. Bxd3 Nxb2 27. g6 fxg6 28. fxg6 Bxf2+ 29. Kh2 h6 30. Bf5 Bxe1 31. Bxh6 Qc4 32. Be3 0-1

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.10.26"]
[Round "2.4"]
[White "Rivas, Oswaldo"]
[Black "Grumer, Eugene"]
[Result "1-0"]
[ECO "A46"]
[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 "Bolivia"]
[BlackTeam "US Virgin Islands"]
[WhiteTeamCountry "BOL"]
[BlackTeamCountry "ISV"]

1. d4 Nf6 2. Nf3 c5 3. c3 e6 4. Bg5 Nc6 5. e3 Be7 6. Bd3 0-0 7. Nbd2 cxd4 8. exd4 Nd5 9. Bxe7 Qxe7 10. 0-0 Nf4 11. Bc2 b6 12. Ne4 d6 13. Qd2 e5 14. dxe5 dxe5 15. Qd6 Bb7 16. Qxe7 Nxe7 17. Nxe5 f5 18. Bb3+ Kh8 19. Nd6 Bxg2 20. Ndf7+ Kg8 21. Nh6+ Kh8 22. Nef7+ Rxf7 23. Nxf7+ Kg8 24. Rfe1 Kf8 25. Ng5 h6 26. Nh7+ Ke8 27. Rad1 Bc6 28. Rd6 Rc8 29. Rxc6 Rxc6 30. Ba4 Kd7 31. Nf8+ Ke8 32. Ne6 Nxe6 33. Rxe6 Kd7 34. Rxe7+ 1-0

