[Event "Villa Gesell tt"]
[Site "Villa Gesell"]
[Date "1994.??.??"]
[Round "?"]
[White "De Dovitiis, Alejo"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "D03"]
[WhiteElo "2350"]
[BlackElo "2370"]
[PlyCount "65"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. Bg5 e6 4. Nbd2 Be7 5. e3 Nbd7 6. Bd3 b6 7. c3 Bb7 8. Qb1 h6 9. Bh4 c5 10. 0-0 0-0 11. b4 cxb4 12. cxb4 Rc8 13. Qb2 Ne4 14. Bxe7 Qxe7 15. Rac1 Nxd2 16. Qxd2 Qd6 17. Qb2 Rfd8 18. b5 Rxc1 19. Rxc1 Rc8 20. Rxc8+ Bxc8 21. Qc2 Bb7 22. Qa4 Qb8 23. h3 Nf6 24. Ne5 Ne4 25. Bxe4 dxe4 26. Qa3 Bd5 27. Qe7 f6 28. Qf7+ Kh7 29. Nc6 Qc8 30. Ne7 Qd8 31. a4 Kh8 32. Ng6+ Kh7 33. Nf4 1-0

[Event "ARAIS tt"]
[Site "Santiago de Chile"]
[Date "1994.??.??"]
[Round "?"]
[White "Dominguez, Hernan"]
[Black "Donoso Velasco, Pedro H"]
[Result "0-1"]
[ECO "C55"]
[WhiteElo "2380"]
[BlackElo "2370"]
[PlyCount "138"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "10"]
[EventCountry "CHI"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. 0-0 0-0 6. c3 d6 7. Re1 Bd7 8. Bb3 Na5 9. Bc2 c5 10. Nbd2 Re8 11. Nf1 Bf8 12. d4 cxd4 13. cxd4 Nc6 14. b3 Bg4 15. Bb2 exd4 16. h3 Bxf3 17. Qxf3 d5 18. Ng3 Ne5 19. Qd1 d3 20. Bxd3 Nxd3 21. Qxd3 Nxe4 22. Nf5 Qb6 23. Bd4 Bc5 24. Bxc5 Qxc5 25. Qd4 Qxd4 26. Nxd4 Kf8 27. Red1 Rac8 28. f3 Nc3 29. Rd2 b5 30. Kf2 g6 31. h4 a6 32. Re1 h5 33. Ra1 Ke7 34. Nc2 Kd6 35. g3 a5 36. Nd4 b4 37. Nc2 Kc5 38. Nd4 Ra8 39. Rc1 Kd6 40. a4 Rac8 41. Rdc2 Kd7 42. Rg1 f6 43. Rgc1 g5 44. hxg5 fxg5 45. Rh1 Rh8 46. Ke3 Rce8+ 47. Kd3 g4 48. Rch2 gxf3 49. Nxf3 Ne4 50. Kd4 Nxg3 51. Ne5+ Rxe5 52. Kxe5 Nxh1 53. Rxh1 h4 54. Kxd5 Rh5+ 55. Kd4 h3 56. Rh2 Ke6 57. Ke4 Rh4+ 58. Kf3 Kd5 59. Kg3 Rd4 60. Kxh3 Rd3+ 61. Kg4 Rxb3 62. Rh5+ Kc4 63. Rxa5 Ra3 64. Ra8 b3 65. Rc8+ Kd3 66. Rd8+ Kc2 67. Rc8+ Kb1 68. Kf3 b2+ 69. Ke2 Ka1 0-1

[Event "ARAIS tt"]
[Site "Santiago de Chile"]
[Date "1994.??.??"]
[Round "?"]
[White "Donoso Velasco, Pedro H"]
[Black "Duarte Mermow, Marcelo R"]
[Result "1/2-1/2"]
[ECO "C01"]
[WhiteElo "2370"]
[BlackElo "2390"]
[PlyCount "51"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "10"]
[EventCountry "CHI"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Nf6 5. Bd3 Bg4 6. 0-0 Be7 7. Re1 0-0 8. Nbd2 c5 9. dxc5 Bxc5 10. Nb3 Bb6 11. Be3 Nc6 12. c3 Re8 13. Bxb6 Qxb6 14. Be2 a5 15. a4 Bxf3 16. gxf3 Nh5 17. Bb5 Rxe1+ 18. Qxe1 Qd8 19. Qe3 Qf6 20. Re1 g6 21. Nd4 Nxd4 22. Qxd4 Qxf3 23. Be2 Qf5 24. Bxh5 Qxh5 25. Re5 Qh6 26. Rxd5 1/2-1/2

[Event "ARAIS tt"]
[Site "Santiago de Chile"]
[Date "1994.??.??"]
[Round "?"]
[White "Donoso Velasco, Pedro H"]
[Black "Egger Mancilla, Jorge Alejandro"]
[Result "0-1"]
[ECO "C78"]
[WhiteElo "2370"]
[BlackElo "2425"]
[PlyCount "91"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "10"]
[EventCountry "CHI"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Bb7 7. Re1 Bc5 8. c3 d6 9. d4 Bb6 10. Bg5 h6 11. Bh4 Qe7 12. a4 g5 13. axb5 axb5 14. Rxa8+ Bxa8 15. Bg3 h5 16. h4 g4 17. Ng5 Nd8 18. Nd2 Nd7 19. Qa1 Bb7 20. Qa2 exd4 21. Nf1 dxc3 22. bxc3 Nf8 23. e5 f6 24. Bf7+ Kd7 25. Qb1 fxg5 26. exd6 Qxf7 27. Re7+ Qxe7 28. dxe7 Kxe7 29. Qxb5 Nfe6 30. Ne3 Nf7 31. hxg5 Nfxg5 32. Nf5+ Kf7 33. Nd6+ cxd6 34. Qxb6 Be4 35. Bxd6 h4 36. Qa7+ Kg6 37. Be5 Rh7 38. Qe3 h3 39. f3 gxf3 40. gxf3 h2+ 41. Bxh2 Nxf3+ 42. Kf2 Rxh2+ 43. Kg3 Kf5 44. Qa7 Rh1 45. Qf7+ Ke5 46. Qd7 0-1

[Event "ARAIS tt"]
[Site "Santiago de Chile"]
[Date "1994.??.??"]
[Round "?"]
[White "Donoso Velasco, Pedro H"]
[Black "Michel Yunis, Christian D"]
[Result "1/2-1/2"]
[ECO "B01"]
[WhiteElo "2370"]
[BlackElo "2340"]
[PlyCount "49"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "10"]
[EventCountry "CHI"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 c6 5. Nf3 Bf5 6. Bd3 Bxd3 7. Qxd3 Nf6 8. 0-0 Nbd7 9. Re1 e6 10. Bd2 Bb4 11. a3 Bxc3 12. Bxc3 Qc7 13. Ne5 0-0 14. Qg3 Nxe5 15. dxe5 Nd5 16. Bd2 Ne7 17. Re4 Rfd8 18. Bg5 Rd5 19. c4 Nf5 20. Qc3 Rd7 21. g4 Ne7 22. Bxe7 Rxe7 23. Rd1 Rd8 24. Red4 Red7 25. Qe3 1/2-1/2

[Event "ARAIS tt"]
[Site "Santiago de Chile"]
[Date "1994.??.??"]
[Round "?"]
[White "Donoso Velasco, Pedro H"]
[Black "Silva Sanchez, Carlos"]
[Result "0-1"]
[ECO "B70"]
[WhiteElo "2370"]
[BlackElo "2370"]
[PlyCount "100"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "10"]
[EventCountry "CHI"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Nb3 Nf6 7. Be2 0-0 8. 0-0 d6 9. Bg5 Be6 10. Kh1 Rc8 11. f4 Re8 12. Bf3 a5 13. a4 Qb6 14. Nd5 Bxd5 15. exd5 Nb4 16. c3 Nd3 17. Qxd3 Qxb3 18. Qb5 Qxb5 19. axb5 b6 20. Ra4 Rc5 21. c4 Rc7 22. Re1 Kf8 23. Bxf6 exf6 24. Rxe8+ Kxe8 25. g3 f5 26. b3 Re7 27. b4 Re1+ 28. Kg2 Bc3 29. bxa5 bxa5 30. Ra2 Kd7 31. Kf2 Ra1 32. Rxa1 Bxa1 33. Bd1 Bd4+ 34. Ke2 Kc7 35. h3 h5 36. Kd3 Bg1 37. g4 fxg4 38. hxg4 h4 39. f5 g5 40. Kc3 Kb6 41. Kb3 Kc5 42. Ka4 Kb6 43. Bf3 Bd4 44. Bh1 Bf6 45. Bg2 Bd8 46. Bh1 Kc5 47. Kb3 Kd4 48. Bg2 Bb6 49. Bh1 f6 50. Bg2 Ke3 0-1

[Event "Villa Gesell tt"]
[Site "Villa Gesell"]
[Date "1994.??.??"]
[Round "?"]
[White "Donoso Velasco, Pedro H"]
[Black "Slipak, Sergio"]
[Result "1/2-1/2"]
[ECO "C61"]
[WhiteElo "2370"]
[BlackElo "2460"]
[PlyCount "54"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 exd4 5. 0-0 Bc5 6. d3 c6 7. Bc4 d6 8. c3 Ne7 9. b4 Bb6 10. Bb2 dxc3 11. Nxc3 0-0 12. Bb3 d5 13. exd5 cxd5 14. Qf3 Bd4 15. Rab1 Be6 16. Qf4 Bf6 17. Ne2 Ng6 18. Qe3 Re8 19. Bxf6 Qxf6 20. Qd4 Qg5 21. f4 Qg4 22. Rbe1 Ne7 23. b5 h5 24. Qf2 h4 25. Nd4 h3 26. g3 Nf5 27. Re5 Nxd4 1/2-1/2

[Event "ARAIS tt"]
[Site "Santiago de Chile"]
[Date "1994.??.??"]
[Round "?"]
[White "Donoso Velasco, Pedro H"]
[Black "Velasquez Ojeda, Cesar"]
[Result "1-0"]
[ECO "C70"]
[WhiteElo "2370"]
[BlackElo "2290"]
[PlyCount "71"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "10"]
[EventCountry "CHI"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 f5 5. d4 exd4 6. e5 Bc5 7. 0-0 b5 8. Bb3 h6 9. c3 d3 10. Qxd3 Nge7 11. a4 Rb8 12. axb5 axb5 13. Na3 Na5 14. Bc2 Bxa3 15. Rxa3 Nc4 16. Ra1 Bb7 17. Re1 Be4 18. Qe2 Bxc2 19. Qxc2 0-0 20. b3 Nb6 21. Ba3 Nbd5 22. Rad1 Ra8 23. Bc5 d6 24. exd6 cxd6 25. Bd4 Qd7 26. c4 bxc4 27. bxc4 Nf4 28. c5 Nfd5 29. Qc4 Kh7 30. c6 Qxc6 31. Qxc6 Nxc6 32. Bxg7 Kxg7 33. Rxd5 Rad8 34. Nh4 f4 35. Nf5+ Kg6 36. Nxd6 1-0

[Event "Villa Gesell tt"]
[Site "Villa Gesell"]
[Date "1994.??.??"]
[Round "?"]
[White "Duarte Mermow, Marcelo R"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "E57"]
[WhiteElo "2390"]
[BlackElo "2370"]
[PlyCount "34"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 c6 2. c4 d5 3. exd5 cxd5 4. cxd5 Qxd5 5. Nc3 Qd8 6. d4 e6 7. Nf3 Nf6 8. Bc4 Nc6 9. a3 Be7 10. 0-0 0-0 11. Re1 b6 12. Bg5 Bb7 13. Ba2 Rc8 14. Qd3 Nd5 15. Bb1 g6 16. Bh6 Re8 17. Nxd5 Qxd5 1/2-1/2

[Event "Villa Gesell tt"]
[Site "Villa Gesell"]
[Date "1994.??.??"]
[Round "?"]
[White "Granda Zuniga, Julio E"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "D34"]
[WhiteElo "2605"]
[BlackElo "2370"]
[PlyCount "75"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 Be7 5. 0-0 0-0 6. d4 c5 7. cxd5 exd5 8. Nc3 Nc6 9. dxc5 Bxc5 10. Bg5 Be6 11. Rc1 Be7 12. Nd4 Qd7 13. Na4 Rad8 14. Nc5 Bxc5 15. Rxc5 Qd6 16. Rc3 Bg4 17. h3 Nxd4 18. hxg4 Qe5 19. Bxf6 Qxf6 20. g5 Qb6 21. Rd3 Ne6 22. Qd2 d4 23. Rb3 Qa6 24. Rc1 Rd7 25. Be4 Rfd8 26. Kg2 g6 27. f4 b6 28. Ra3 Qb5 29. Bc6 Qf5 30. Bxd7 Rxd7 31. Qd3 Qd5+ 32. Qf3 a5 33. Rd3 Nc5 34. Qxd5 Rxd5 35. Rd2 Ne4 36. Rc8+ Kg7 37. Rd1 Nc5 38. Rc6 1-0

[Event "ARAIS tt"]
[Site "Santiago de Chile"]
[Date "1994.??.??"]
[Round "?"]
[White "Navarro, Nelson"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "A05"]
[WhiteElo "2185"]
[BlackElo "2370"]
[PlyCount "97"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "10"]
[EventCountry "CHI"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. 0-0 Be7 5. d3 b6 6. Nbd2 Bb7 7. c3 0-0 8. b4 Nbd7 9. Bb2 Re8 10. b5 e5 11. Nb3 Bd6 12. a4 a6 13. Nh4 axb5 14. axb5 Rxa1 15. Qxa1 Qa8 16. Nf5 Bf8 17. c4 g6 18. Ne3 d4 19. Qxa8 Bxa8 20. Nc2 Bxg2 21. Kxg2 Ra8 22. Ra1 Rxa1 23. Bxa1 Nc5 24. Nxc5 bxc5 25. Bb2 Nd7 26. Bc1 f5 27. e4 Kf7 28. f3 Ke6 29. Na1 Kd6 30. Nb3 h5 31. Na5 Ke6 32. Nc6 Nb6 33. Kf2 Bd6 34. Bg5 Nc8 35. Nd8+ Kd7 36. Nf7 Ke6 37. Nd8+ Kd7 38. Nc6 Ke6 39. h3 Be7 40. Bxe7 Nxe7 41. Nd8+ Kd7 42. Nb7 Nc8 43. Nxc5+ Kd6 44. Nb7+ Kd7 45. exf5 gxf5 46. f4 exf4 47. gxf4 c6 48. bxc6+ Kxc6 49. Na5+ 1-0

[Event "ARAIS tt"]
[Site "Santiago de Chile"]
[Date "1994.??.??"]
[Round "?"]
[White "Pinto Pinares, Marcelo"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "B14"]
[WhiteElo "2245"]
[BlackElo "2370"]
[PlyCount "54"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "10"]
[EventCountry "CHI"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 Bb4 7. Bg5 h6 8. Bxf6 Qxf6 9. a3 Bxc3+ 10. bxc3 Nc6 11. Bd3 0-0 12. 0-0 dxc4 13. Bxc4 e5 14. dxe5 Nxe5 15. Nxe5 Qxe5 16. Qb3 Qc7 17. Bd5 Rb8 18. Rfe1 b6 19. Qb4 a5 20. Qd4 Bb7 21. c4 Qc5 22. Qxc5 bxc5 23. g3 Bxd5 24. cxd5 Rfd8 25. Red1 Rb3 26. Rac1 Rd6 27. a4 Rb4 1/2-1/2

[Event "Villa Gesell tt"]
[Site "Villa Gesell"]
[Date "1994.??.??"]
[Round "?"]
[White "Roca, Alfredo Cristian"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "A13"]
[WhiteElo "2360"]
[BlackElo "2370"]
[PlyCount "129"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. Nf3 d5 2. b3 Nf6 3. Bb2 e6 4. e3 Be7 5. c4 0-0 6. d4 c5 7. Bd3 Nc6 8. Nc3 cxd4 9. exd4 b6 10. 0-0 Ba6 11. Re1 Rc8 12. cxd5 Bxd3 13. dxc6 Bf5 14. Ne5 Nd5 15. Qf3 Bb4 16. Rec1 Bxc3 17. Bxc3 Qd6 18. Bb2 f6 19. Nc4 Qxc6 20. Ne3 Qd7 21. Nxf5 exf5 22. Rc4 Rfe8 23. Rac1 Rcd8 24. h3 h6 25. Ba3 Qe6 26. Rc6 Qe4 27. Qxe4 fxe4 28. Kf1 e3 29. Re1 Re4 30. Bb2 Rde8 31. fxe3 Rxe3 32. Rxe3 Nxe3+ 33. Kg1 Nd5 34. Kf1 Kf7 35. Rd6 Ne3+ 36. Kg1 Nf5 37. Rd7+ Re7 38. Rd5 Ke6 39. Rd8 Rd7 40. Rc8 Nxd4 41. Rc4 Nf5 42. Re4+ Kd5 43. Rf4 Nd6 44. Rd4+ Ke6 45. g4 Rc7 46. Rd2 Ne4 47. Re2 f5 48. Kg2 Rd7 49. Bc1 g5 50. Kh2 Rd1 51. Bb2 Rd7 52. Kg2 h5 53. Bc1 hxg4 54. hxg4 Rc7 55. Bb2 b5 56. Kf3 Re7 57. Ba3 Re8 58. Bb2 a5 59. Ba1 b4 60. Bb2 Kf7 61. gxf5 Nc3 62. Rc2 Kf6 63. Bxc3+ bxc3 64. Rxc3 Kxf5 65. a3 1/2-1/2

[Event "ARAIS tt"]
[Site "Santiago de Chile"]
[Date "1994.??.??"]
[Round "?"]
[White "Vasquez Schroder, Rodrigo Rafael"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "B10"]
[WhiteElo "2490"]
[BlackElo "2370"]
[PlyCount "95"]
[EventDate "1994.??.??"]
[EventType "team"]
[EventRounds "10"]
[EventCountry "CHI"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c6 2. d3 d5 3. Nd2 e5 4. Ngf3 Bd6 5. g3 Nf6 6. Bg2 0-0 7. 0-0 Bg4 8. h3 Bh5 9. Re1 Nbd7 10. a4 a5 11. Nb3 Re8 12. c3 h6 13. Qc2 Bg6 14. Nh4 Bh7 15. Be3 Qc7 16. Rad1 Rad8 17. Nf5 Bxf5 18. exf5 e4 19. d4 b5 20. Nd2 Nb6 21. axb5 cxb5 22. Bf1 Nc4 23. Nxc4 bxc4 24. Ra1 Rb8 25. Kg2 Qd7 26. Rxa5 Qxf5 27. Be2 h5 28. Rea1 Rb6 29. Ra8 Bb8 30. R1a3 h4 31. b3 hxg3 32. fxg3 cxb3 33. Rxb3 Qe6 34. Qb1 Rxb3 35. Qxb3 Bd6 36. Rxe8+ Qxe8 37. g4 Qb8 38. Bd1 Qc7 39. g5 Bh2 40. Bf2 e3 41. Be1 Ne4 42. Qxd5 Nxc3 43. Qa8+ Kh7 44. g6+ fxg6 45. Bb3 g5 46. Qg8+ Kg6 47. Qe8+ Kf6 48. Qe6# 1-0

[Event "Santiago ARAIS tt-A"]
[Site "Santiago de Chile"]
[Date "1993.??.??"]
[Round "9"]
[White "Bombardiere Rosas, Eduardo"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "D34"]
[WhiteElo "2270"]
[BlackElo "2370"]
[PlyCount "33"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CHI"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. d4 0-0 6. 0-0 c5 7. cxd5 exd5 8. Nc3 Nc6 9. Bg5 Be6 10. dxc5 Bxc5 11. Bxf6 Qxf6 12. Nxd5 Qxb2 13. Nc7 Rad8 14. Qc1 Qxc1 15. Raxc1 Be7 16. Nxe6 fxe6 17. h4 1/2-1/2

[Event "Santiago ARAIS tt-A"]
[Site "Santiago de Chile"]
[Date "1993.??.??"]
[Round "7"]
[White "Donoso Velasco, Pedro H"]
[Black "Sepulveda, Luis"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "2370"]
[BlackElo "2260"]
[PlyCount "68"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CHI"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[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. Bxf6 Bxf6 11. c3 0-0 12. Nc2 Bg5 13. a4 Rb8 14. axb5 axb5 15. Be2 Ne7 16. Ncb4 Bb7 17. 0-0 f5 18. exf5 Rxf5 19. Bg4 Rf8 20. Be6+ Kh8 21. Qh5 Nf5 22. Rad1 g6 23. Qe2 Ng7 24. Bg4 Ba8 25. Bf3 Ne6 26. g3 Qe8 27. Bg2 Qf7 28. Rfe1 Nc5 29. Ne3 Bxe3 30. Qxe3 Bxg2 31. Kxg2 Qb7+ 32. f3 Rbd8 33. Nd5 Rf5 34. b4 Ne6 1/2-1/2

[Event "Santiago ARAIS tt-A"]
[Site "Santiago de Chile"]
[Date "1993.??.??"]
[Round "8"]
[White "Donoso Velasco, Pedro H"]
[Black "Silva Lillo, Sebastian"]
[Result "1/2-1/2"]
[ECO "B38"]
[WhiteElo "2370"]
[BlackElo "2350"]
[PlyCount "42"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CHI"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3 Nf6 7. Nc3 0-0 8. Be2 d6 9. 0-0 Bd7 10. Qd2 Nxd4 11. Bxd4 Bc6 12. f3 a5 13. Rad1 Nd7 14. f4 a4 15. Kh1 Bxd4 16. Qxd4 Qa5 17. Nd5 Bxd5 18. exd5 Rac8 19. Bg4 f5 20. Be2 Qc5 21. g4 Nf6 1/2-1/2

[Event "Santiago ARAIS tt-A"]
[Site "Santiago de Chile"]
[Date "1993.??.??"]
[Round "4"]
[White "Donoso Velasco, Pedro H"]
[Black "Stawizsinski, Walter"]
[Result "1-0"]
[ECO "C14"]
[WhiteElo "2370"]
[PlyCount "117"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CHI"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4 f5 8. Qh5+ g6 9. Qh6 a6 10. Nf3 c5 11. h4 cxd4 12. Nxd4 Nc6 13. 0-0-0 Nc5 14. h5 Rg8 15. hxg6 hxg6 16. Qh7 Qxh7 17. Rxh7 Bd7 18. Nf3 0-0-0 19. Bd3 Rh8 20. Rdh1 Rxh7 21. Rxh7 Rg8 22. Ng5 d4 23. Ne2 b5 24. Kd2 Na4 25. b3 Nb6 26. g3 Nd5 27. a4 Nc7 28. axb5 axb5 29. Nf3 b4 30. Nfxd4 Nxd4 31. Nxd4 g5 32. Bc4 gxf4 33. gxf4 Kd8 34. Ke3 Rg3+ 35. Kf2 Rg4 36. Kf3 Rg6 37. Rh8+ Ne8 38. Bb5 Bxb5 39. Nxb5 Kd7 40. Nd4 Nc7 41. Rh7+ Kc8 42. Nc6 Nd5 43. Ne7+ Nxe7 44. Rxe7 Rh6 45. Kg3 Rg6+ 46. Kf2 Rh6 47. Ke3 Rh3+ 48. Kd4 Rf3 49. Rxe6 Rxf4+ 50. Kd5 Rf2 51. Rc6+ Kb7 52. Rc4 Ka6 53. e6 Re2 54. Rxb4 Rxc2 55. e7 Re2 56. Kd6 Ka5 57. Rb8 Rd2+ 58. Kc5 Rc2+ 59. Kd4 1-0

[Event "Santiago ARAIS tt-B"]
[Site "Santiago de Chile"]
[Date "1993.??.??"]
[Round "?"]
[White "Donoso Velasco, Pedro H"]
[Black "Zapata Ferrada, Marco"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "2370"]
[BlackElo "2230"]
[PlyCount "52"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CHI"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. a4 a6 8. Na3 Be6 9. Bg5 Be7 10. Bc4 0-0 11. 0-0 Rc8 12. Bxf6 Bxf6 13. Nd5 Bg5 14. c3 Ne7 15. Qd3 Nxd5 16. Bxd5 Bxd5 17. Qxd5 Qc7 18. Rfd1 Qc6 19. Nc2 Qxd5 20. Rxd5 Rc4 21. f3 f5 22. exf5 Rxf5 23. Rxd6 e4 24. fxe4 Rxe4 25. Rf1 Rxf1+ 26. Kxf1 Rxa4 1/2-1/2

[Event "Santiago ARAIS tt-A"]
[Site "Santiago de Chile"]
[Date "1992.??.??"]
[Round "?"]
[White "Donoso Velasco, Pedro H"]
[Black "Araya, Ricardo"]
[Result "1/2-1/2"]
[ECO "C96"]
[WhiteElo "2370"]
[BlackElo "2290"]
[PlyCount "41"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CHI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

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. h3 Na5 10. Bc2 c5 11. d4 Bb7 12. Nbd2 cxd4 13. cxd4 exd4 14. Nxd4 Re8 15. b4 Nc6 16. Nxc6 Bxc6 17. Bb2 Bf8 18. Rc1 Rc8 19. Bb3 Bb7 20. Rxc8 Bxc8 21. Nf3 1/2-1/2

[Event "Santiago ARAIS tt-A"]
[Site "Santiago de Chile"]
[Date "1992.??.??"]
[Round "?"]
[White "Donoso Velasco, Pedro H"]
[Black "Velasquez Ojeda, Cesar"]
[Result "1/2-1/2"]
[ECO "B87"]
[WhiteElo "2370"]
[BlackElo "2315"]
[PlyCount "27"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CHI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 b5 8. 0-0 Be7 9. Qf3 Qc7 10. Re1 0-0 11. Qg3 b4 12. Na4 Kh8 13. Bg5 Nc6 14. c3 1/2-1/2

[Event "Santiago ARAIS tt-A"]
[Site "Santiago de Chile"]
[Date "1992.??.??"]
[Round "?"]
[White "Godoy Bugueno, David A"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "B89"]
[WhiteElo "2315"]
[BlackElo "2370"]
[PlyCount "61"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CHI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. Be3 Be7 8. Qe2 0-0 9. 0-0-0 Qa5 10. Nb3 Qc7 11. f4 a6 12. g4 b5 13. Bd3 Bb7 14. g5 Nd7 15. Qh5 Nb4 16. Kb1 g6 17. Qg4 Rfc8 18. h4 Bf8 19. h5 Bg7 20. hxg6 hxg6 21. Nd4 Nxd3 22. cxd3 b4 23. Nce2 e5 24. Rc1 Qd8 25. Ne6 Rxc1+ 26. Rxc1 fxe6 27. Qxe6+ Kf8 28. fxe5 Qe7 29. Rf1+ Ke8 30. Qxg6+ Kd8 31. exd6 1-0

[Event "Santiago ARAIS tt-A"]
[Site "Santiago de Chile"]
[Date "1992.??.??"]
[Round "?"]
[White "Pinto Pinares, Marcelo"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "C77"]
[WhiteElo "2235"]
[BlackElo "2370"]
[PlyCount "140"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CHI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 d6 6. c3 g6 7. Nbd2 Bg7 8. 0-0 0-0 9. Re1 b5 10. Bc2 Bb7 11. Nf1 Re8 12. Ng3 Nb8 13. h3 Nbd7 14. Nh2 d5 15. Ng4 Nxg4 16. Qxg4 h5 17. Qe2 Nc5 18. Nf1 Ne6 19. g3 c5 20. Bb3 dxe4 21. dxe4 c4 22. Bc2 Nc5 23. b4 cxb3 24. axb3 Qc8 25. Ba3 Bf8 26. Kh2 Qe6 27. c4 Bc8 28. h4 bxc4 29. bxc4 Qh3+ 30. Kg1 Bg4 31. f3 Be6 32. Qf2 Bxc4 33. Ne3 Be6 34. Red1 Red8 35. Nd5 Bxd5 36. exd5 Rac8 37. Rd2 Bd6 38. Qg2 Qxg2+ 39. Kxg2 a5 40. Bb2 Ra8 41. Re2 a4 42. Re3 Rab8 43. Bc3 Rdc8 44. Kh3 f5 45. Bxe5 Bxe5 46. Rxe5 Rb2 47. Bb1 Nb3 48. Bxf5 gxf5 49. Rxa4 Nc5 50. Rc4 Rbb8 51. Rxf5 Nd3 52. Rxc8+ Rxc8 53. Rg5+ Kf7 54. Rxh5 Nf2+ 55. Kg2 Rc2 56. Kf1 Nd3 57. Rf5+ Kg6 58. g4 Rf2+ 59. Kg1 Rd2 60. h5+ Kh6 61. d6 Ne1 62. Kf1 Nc2 63. Kg1 Ne3 64. Re5 Nc4 65. Rc5 Nxd6 66. f4 Ne4 67. Rc6+ Kg7 68. g5 Rd5 69. h6+ Kh8 70. Kg2 Nxg5 1/2-1/2

[Event "Santiago ARAIS tt-A"]
[Site "Santiago de Chile"]
[Date "1992.??.??"]
[Round "?"]
[White "Salazar Jacob, Hernan"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "C49"]
[WhiteElo "2380"]
[BlackElo "2370"]
[PlyCount "101"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CHI"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. 0-0 0-0 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 Nd8 10. d4 Ne6 11. Bc1 c5 12. a4 Nc7 13. Bd3 Bg4 14. d5 Nh5 15. h3 Bd7 16. Nh2 g6 17. Ng4 f6 18. c4 Nf4 19. Bf1 h5 20. Nh2 h4 21. Qf3 g5 22. g3 Ng6 23. Ng4 Kg7 24. Ne3 Rh8 25. Nf5+ Bxf5 26. Qxf5 Qe8 27. Rb1 Rb8 28. a5 Qc8 29. Qxc8 Rhxc8 30. Bd2 Na8 31. Rb3 Rc7 32. Reb1 hxg3 33. fxg3 Nf8 34. Be2 Nd7 35. Bg4 b6 36. Kg2 Rh8 37. Rf1 bxa5 38. Bxd7 Rxd7 39. Bxa5 Kg6 40. Rbf3 Rf7 41. Rb1 g4 42. hxg4 Rfh7 43. Rbf1 Rh2+ 44. Kg1 Rh1+ 45. Kf2 Rxf1+ 46. Kxf1 Nb6 47. Bxb6 axb6 48. Rb3 Rh2 49. Rxb6 Rxc2 50. Rxd6 Rxc4 51. Rc6 1/2-1/2

[Event "Santiago Esucomex op"]
[Site "Santiago de Chile"]
[Date "1991.??.??"]
[Round "?"]
[White "Araya, Ricardo"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "D47"]
[WhiteElo "2275"]
[BlackElo "2370"]
[PlyCount "45"]
[EventDate "1991.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CHI"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. e4 b4 10. Na4 c5 11. e5 Nd5 12. Nxc5 Bxc5 13. dxc5 Nxc5 14. Bb5+ Ke7 15. Qd4 Qb6 16. Qh4+ f6 17. Bc4 Ba6 18. 0-0 Bxc4 19. Qxc4 f5 20. Qh4+ Kf7 21. Qh5+ g6 22. Qh6 Ne4 23. Bg5 1/2-1/2

[Event "Olympiad-24"]
[Site "Valetta"]
[Date "1980.12.03"]
[Round "12"]
[White "Ramos, Domingo"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "C25"]
[WhiteElo "2280"]
[BlackElo "2430"]
[PlyCount "73"]
[EventDate "1980.11.20"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "MLT"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Philippines"]
[BlackTeam "Chile"]
[WhiteTeamCountry "PHI"]
[BlackTeamCountry "CHI"]

1. e4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Nh3 Nge7 7. 0-0 0-0 8. Be3 Nd4 9. f4 c6 10. fxe5 dxe5 11. Kh1 c5 12. Qd2 f6 13. Rf2 Be6 14. Ng1 Qd7 15. Nd1 Rad8 16. Bh6 c4 17. Bxg7 Kxg7 18. dxc4 Bxc4 19. Ne3 Be6 20. Qe1 Qb5 21. b3 Qc5 22. c3 Ndc6 23. b4 Qb6 24. Qe2 a5 25. a3 Na7 26. Rb1 Rd7 27. c4 axb4 28. axb4 Nac6 29. Nd5 Qd8 30. Nf3 b5 31. cxb5 Nd4 32. Nxd4 exd4 33. Nf4 Qb6 34. Qd3 Rc8 35. Rc2 Rxc2 36. Qxc2 Bf7 37. Qc5 1-0

[Event "Olympiad-24"]
[Site "Valetta"]
[Date "1980.12.02"]
[Round "11"]
[White "Donoso Velasco, Pedro H"]
[Black "Pirttimaki, Timo"]
[Result "1-0"]
[ECO "D76"]
[WhiteElo "2430"]
[PlyCount "65"]
[EventDate "1980.11.20"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "MLT"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Chile"]
[BlackTeam "Finland"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "FIN"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Bg7 6. Bg2 Nb6 7. Nf3 0-0 8. 0-0 Nc6 9. e3 e5 10. d5 Ne7 11. e4 Nc4 12. b3 Nd6 13. Ba3 Bg4 14. h3 Bxf3 15. Bxf3 f5 16. Rc1 a6 17. Kg2 Rf7 18. Qd3 Qd7 19. Bxd6 Qxd6 20. Rfd1 Raf8 21. Rc2 b5 22. a4 b4 23. Na2 Qb6 24. a5 Qxa5 25. d6 cxd6 26. Qxd6 Rc8 27. Nxb4 Rxc2 28. Nxc2 Bf8 29. Qe6 Qc3 30. Ne3 f4 31. Ng4 Nc6 32. Rd7 Be7 33. Nh6+ 1-0

[Event "Olympiad-24"]
[Site "Valetta"]
[Date "1980.11.29"]
[Round "9"]
[White "Qendro, Llambi"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "A06"]
[BlackElo "2430"]
[PlyCount "42"]
[EventDate "1980.11.20"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "MLT"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Albania"]
[BlackTeam "Chile"]
[WhiteTeamCountry "ALB"]
[BlackTeamCountry "CHI"]

1. d4 d5 2. Nf3 c5 3. e3 Nc6 4. b3 Bg4 5. Be2 Nf6 6. 0-0 e6 7. Bb2 Rc8 8. Ne5 Bxe2 9. Qxe2 Be7 10. dxc5 Bxc5 11. Rd1 Qe7 12. Nd2 Nxe5 13. Bxe5 0-0 14. c4 Rfd8 15. Bxf6 Qxf6 16. cxd5 Rxd5 17. Ne4 Qe5 18. Nxc5 Rdxc5 19. g3 g6 20. Qf3 b5 21. Rd4 Rc2 1/2-1/2

[Event "Olympiad-24"]
[Site "Valetta"]
[Date "1980.11.28"]
[Round "8"]
[White "Donoso Velasco, Pedro H"]
[Black "Lkhagva, Jambaldoo"]
[Result "1-0"]
[ECO "E55"]
[WhiteElo "2430"]
[BlackElo "2330"]
[PlyCount "65"]
[EventDate "1980.11.20"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "MLT"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Chile"]
[BlackTeam "Mongolia"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "MGL"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nf3 c5 6. Bd3 d5 7. 0-0 dxc4 8. Bxc4 Nbd7 9. Qe2 cxd4 10. exd4 Nb6 11. Bb3 Nbd5 12. Bd2 Be7 13. Ne5 a6 14. Rad1 Bd7 15. Rfe1 Bc6 16. Bg5 h6 17. Bc1 Rc8 18. Rd3 Bb5 19. Nxb5 Rxc1 20. Rxc1 Nf4 21. Qf3 Nxd3 22. Nxd3 axb5 23. Qxb7 Qxd4 24. Qxb5 Rd8 25. Rd1 Qh4 26. g3 Qg4 27. Qb7 Bc5 28. Kg2 Nd5 29. Qxf7+ Kxf7 30. Ne5+ Kf6 31. Nxg4+ Kf5 32. Kf3 h5 33. Bc2+ 1-0

[Event "Olympiad-24"]
[Site "Valetta"]
[Date "1980.11.25"]
[Round "5"]
[White "Roth, Peter"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "B57"]
[BlackElo "2430"]
[PlyCount "99"]
[EventDate "1980.11.20"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "MLT"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Austria"]
[BlackTeam "Chile"]
[WhiteTeamCountry "AUT"]
[BlackTeamCountry "CHI"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4 Bd7 7. Bb3 g6 8. Be3 Ng4 9. Nxc6 bxc6 10. Qf3 Nf6 11. h3 Bg7 12. g4 0-0 13. Rd1 Qa5 14. 0-0 Be6 15. Qg2 Nd7 16. f4 Nb6 17. Rf3 Nc4 18. Bc1 d5 19. exd5 Bxd5 20. Nxd5 cxd5 21. c3 e6 22. Kh1 Rad8 23. f5 Rfe8 24. h4 e5 25. f6 e4 26. Rf5 Qc5 27. Bxc4 Qxc4 28. Be3 Bf8 29. h5 Bc5 30. hxg6 Bxe3 31. Qh3 fxg6 32. f7+ Kg7 33. fxe8Q Rxe8 34. Rfxd5 Bc5 35. Rd7+ Re7 36. Rxe7+ Bxe7 37. Qe3 Bc5 38. Rd7+ Kg8 39. Qf4 Qe6 40. Rd8+ Kg7 41. Qc7+ Be7 42. Rd7 Kf6 43. Qf4+ Kg7 44. Rd4 Qxa2 45. Qe5+ Kf7 46. Qd5+ Qxd5 47. Rxd5 Ke6 48. Ra5 Bh4 49. Kg2 g5 50. Kf1 1-0

[Event "Olympiad-24"]
[Site "Valetta"]
[Date "1980.11.23"]
[Round "4"]
[White "Donoso Velasco, Pedro H"]
[Black "McNab, Colin Anderson"]
[Result "1/2-1/2"]
[ECO "B08"]
[WhiteElo "2430"]
[PlyCount "90"]
[EventDate "1980.11.20"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "MLT"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "Chile"]
[BlackTeam "Scotland"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "SCO"]

1. d4 d6 2. e4 g6 3. Nc3 Bg7 4. Nf3 Nf6 5. Be2 0-0 6. 0-0 c6 7. Re1 Qc7 8. a4 Nbd7 9. Bf1 Rd8 10. h3 e5 11. Bg5 Nf8 12. d5 h6 13. Be3 Qb8 14. a5 Bd7 15. Bc4 Be8 16. Nd2 c5 17. Bb5 Kh7 18. Bxe8 Nxe8 19. Nc4 Nd7 20. Ra3 b5 21. axb6 axb6 22. Rxa8 Qxa8 23. Nb5 Ndf6 24. Qd3 Qa4 25. Nd2 Nh5 26. Qb3 Qa6 27. g3 Ra8 28. Kg2 Qc8 29. Nc4 Qd8 30. Bd2 Bf6 31. Rf1 Bg7 32. Bc3 Bf8 33. Kh2 Nc7 34. Ne3 Nxb5 35. Qxb5 Nf6 36. f3 Nh5 37. Bd2 Ra2 38. Rf2 Be7 39. Qd3 Bg5 40. c4 Nxg3 41. Kxg3 Bh4+ 42. Kg2 Bxf2 43. Kxf2 Qh4+ 44. Kg2 Qg5+ 45. Kf2 Qh4+ 1/2-1/2

[Event "Olympiad-24"]
[Site "Valetta"]
[Date "1980.11.21"]
[Round "2"]
[White "Shamkovich, Leonid Alexandrovic"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "C98"]
[WhiteElo "2515"]
[BlackElo "2430"]
[PlyCount "107"]
[EventDate "1980.11.20"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "MLT"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]
[WhiteTeam "United States"]
[BlackTeam "Chile"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "CHI"]

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 Bg4 10. d5 Na5 11. Bc2 c5 12. h3 Bc8 13. Nbd2 Qc7 14. b3 Bd7 15. Nf1 Nb7 16. Ng3 g6 17. Bh6 Rfb8 18. Qd2 c4 19. b4 a5 20. a3 Qd8 21. Nh2 axb4 22. cxb4 Bf8 23. Bg5 Bg7 24. f3 Qf8 25. Ng4 Nxg4 26. hxg4 Nd8 27. Be3 f6 28. Ne2 Nf7 29. Nc3 Bh6 30. Bxh6 Qxh6 31. Qxh6 Nxh6 32. Reb1 f5 33. gxf5 gxf5 34. a4 bxa4 35. Bxa4 Bxa4 36. Rxa4 Rxa4 37. Nxa4 fxe4 38. fxe4 Ng4 39. Nc3 Nf6 40. b5 Nd7 41. Ra1 Rb7 42. Ra8+ Kf7 43. Kf2 Nb6 44. Rh8 Kf6 45. g4 Ra7 46. Rb8 Ra3 47. Rxb6 Rxc3 48. Rxd6+ Kg5 49. Rd8 Kf4 50. Rf8+ Kxe4 51. d6 Rc2+ 52. Kf1 Rc1+ 53. Kg2 Rd1 54. b6 1-0

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.11.10"]
[Round "14"]
[White "Jamieson, Robert Murray"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "C66"]
[WhiteElo "2420"]
[BlackElo "2405"]
[PlyCount "77"]
[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 "Australia"]
[BlackTeam "Chile"]
[WhiteTeamCountry "AUS"]
[BlackTeamCountry "CHI"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 d6 5. d4 Bd7 6. Nc3 Be7 7. dxe5 Nxe5 8. Bxd7+ Qxd7 9. Nxe5 dxe5 10. Qxd7+ Nxd7 11. Nd5 Bd8 12. a4 0-0 13. b3 Re8 14. Ba3 c6 15. Ne3 Nf6 16. f3 Bb6 17. Kf2 Bd4 18. Rac1 Nh5 19. g3 Nf4 20. Rcd1 Ne6 21. Rd3 a5 22. Ke2 g6 23. Ng4 Kg7 24. c3 Bc5 25. Bb2 f6 26. f4 h5 27. Ne3 exf4 28. gxf4 Rad8 29. Rxd8 Rxd8 30. Nc4 b6 31. Bc1 Kf7 32. f5 gxf5 33. Rxf5 Kg6 34. Rf3 Re8 35. e5 f5 36. Rg3+ Kf7 37. Rf3 Kg6 38. Rg3+ Kf7 39. Rf3 1/2-1/2

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.11.08"]
[Round "13"]
[White "Giardelli, Sergio Carlos"]
[Black "Donoso Velasco, Pedro H"]
[Result "0-1"]
[ECO "D34"]
[WhiteElo "2315"]
[BlackElo "2405"]
[PlyCount "105"]
[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 "Argentina II"]
[BlackTeam "Chile"]
[WhiteTeamCountry "ARG"]
[BlackTeamCountry "CHI"]

1. g3 d5 2. Nf3 Nf6 3. Bg2 c5 4. c4 e6 5. 0-0 Nc6 6. cxd5 exd5 7. d4 Be7 8. b3 0-0 9. Bb2 Re8 10. Nc3 Bg4 11. dxc5 Bxc5 12. Rc1 Bb6 13. Na4 Ne4 14. Nxb6 axb6 15. a3 Qd7 16. Nd4 Nc5 17. Re1 Rad8 18. Rc2 Ne5 19. Qd2 Bh3 20. Rd1 Bxg2 21. Kxg2 Qg4 22. Qf4 Qg6 23. Nf5 f6 24. Ne3 d4 25. Bxd4 Ne6 26. Qh4 Nc6 27. Rxc6 bxc6 28. Bxb6 Rxd1 29. Nxd1 Qc2 30. Ne3 Qxb3 31. Nc4 Qd1 32. Qe4 Qd5 33. Qxd5 cxd5 34. Ne3 d4 35. Nf5 Rb8 36. Bxd4 g6 37. Ne7+ Kf7 38. Nc6 Rc8 39. Na7 Rc2 40. Be3 Rxe2 41. Nb5 Ra2 42. Kf3 f5 43. h4 Kf6 44. Bc1 Rc2 45. Be3 Ke5 46. Kg2 f4 47. gxf4+ Nxf4+ 48. Kf3 Ne6 49. a4 Ra2 50. Nc3 Ra3 51. Ne2 Rxa4 52. Kg3 h5 53. f3 0-1

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.11.07"]
[Round "12"]
[White "Donoso Velasco, Pedro H"]
[Black "Hamann, Svend"]
[Result "0-1"]
[ECO "B84"]
[WhiteElo "2405"]
[PlyCount "78"]
[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 "Chile"]
[BlackTeam "Denmark"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "DEN"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. 0-0 Be7 8. f4 Qc7 9. Kh1 Nc6 10. a4 Bd7 11. Nb3 0-0 12. Bf3 Nb4 13. a5 Bc6 14. Be3 d5 15. e5 Nd7 16. Nd4 b6 17. axb6 Nxb6 18. f5 Nc4 19. Bf4 Bc5 20. f6 g6 21. Nb3 Bb6 22. Qe1 Kh8 23. Qh4 Rg8 24. Qg5 Nxc2 25. Rac1 N2e3 26. Rfe1 Nf5 27. Ne4 dxe4 28. Bxe4 Bxe4 29. Rxe4 Rac8 30. Nd2 Nxd2 31. Bxd2 Qb7 32. Rce1 Rc2 33. Bc3 Qd5 34. Qg4 Rd8 35. Qh3 Kg8 36. Rf4 Ne3 37. Rf3 h5 38. Rg3 Ng4 39. Rf3 Nf2+ 0-1

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.11.06"]
[Round "11"]
[White "Garcia, Gildardo"]
[Black "Donoso Velasco, Pedro H"]
[Result "0-1"]
[ECO "C76"]
[WhiteElo "2365"]
[BlackElo "2405"]
[PlyCount "86"]
[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 "Columbia"]
[BlackTeam "Chile"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "CHI"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. 0-0 g6 7. d4 Bg7 8. d5 Nb8 9. c4 Nf6 10. Bxd7+ Nbxd7 11. Nc3 0-0 12. Rb1 Nc5 13. Qc2 a5 14. b3 c6 15. dxc6 bxc6 16. Rd1 Qc7 17. Ba3 Rfe8 18. Bxc5 dxc5 19. Na4 Bf8 20. Rd2 Rad8 21. Rbd1 Nh5 22. Rxd8 Rxd8 23. Rxd8 Qxd8 24. g3 f6 25. Ne1 Ng7 26. Qd3 Qc7 27. Qe3 Ne6 28. Nd3 Qd6 29. Kg2 h5 30. Nab2 Kh7 31. Qe1 Qd8 32. f4 Qd4 33. Qe2 Bh6 34. fxe5 fxe5 35. h4 Kg7 36. Nd1 a4 37. N1f2 a3 38. Qe1 Be3 39. Qe2 Bxf2 40. Nxf2 Qb2 41. Qd3 Qxa2 42. Qd6 Kf6 43. g4 hxg4 0-1

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.11.04"]
[Round "10"]
[White "Donoso Velasco, Pedro H"]
[Black "Torre, Eugenio"]
[Result "0-1"]
[ECO "B59"]
[WhiteElo "2405"]
[BlackElo "2490"]
[PlyCount "82"]
[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 "Chile"]
[BlackTeam "Philippines"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "PHI"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 Be7 8. 0-0 0-0 9. Be3 Be6 10. Bf3 Bc4 11. Re1 a5 12. Nd5 Nxd5 13. exd5 Nb8 14. Nd2 Ba6 15. Be2 Bg5 16. Bxa6 Nxa6 17. Bxg5 Qxg5 18. Nc4 Qd8 19. Qd2 Nc5 20. a4 f5 21. f3 Qc7 22. b3 b6 23. Rad1 f4 24. Qe2 Nd7 25. Qf2 Rac8 26. Re2 Kh8 27. Na3 Nc5 28. Nb5 Qd7 29. Qh4 Rf6 30. Qe1 g5 31. h3 h5 32. Nc3 Rg6 33. Kf2 g4 34. hxg4 hxg4 35. Qd2 g3+ 36. Ke1 Rh6 37. Qc1 b5 38. axb5 Qa7 39. Qb2 a4 40. Nxa4 Nxa4 41. bxa4 Qa5+ 0-1

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.11.03"]
[Round "9"]
[White "Donoso Velasco, Pedro H"]
[Black "Segal, Alexandru Sorin"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "2405"]
[PlyCount "31"]
[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 "Chile"]
[BlackTeam "Brazil"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "BRA"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2 Qe7 6. d3 Nf6 7. Bg5 Qxe2+ 8. Bxe2 Be7 9. Nc3 c6 10. 0-0-0 Na6 11. Rhe1 Nc7 12. Ne4 Nxe4 13. dxe4 Bxg5+ 14. Nxg5 Ke7 15. Bc4 Be6 16. Bxe6 1/2-1/2

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.11.02"]
[Round "8"]
[White "Hebert, Jean"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "C45"]
[WhiteElo "2255"]
[BlackElo "2405"]
[PlyCount "148"]
[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 "Canada"]
[BlackTeam "Chile"]
[WhiteTeamCountry "CAN"]
[BlackTeamCountry "CHI"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5 Ne4 7. Qf3 Nc5 8. Bc4 Ne6 9. 0-0 Qh4 10. Bxe6 fxe6 11. Nc3 Be7 12. Ne4 Rf8 13. Qd3 Rb8 14. b3 Rb5 15. f4 Rd5 16. Qe2 c5 17. g3 Qh3 18. Qb5 Qf5 19. Nc3 Rd4 20. Be3 Rb4 21. Qa5 Bb7 22. Rf2 Qh3 23. Qxc7 Bh4 24. Rd1 Bc6 25. Qc8+ Kf7 26. Rxd7+ Bxd7 27. Qxd7+ Kg8 28. Qd3 Rd8 29. Qf1 Qxf1+ 30. Kxf1 Be7 31. Na4 Rd1+ 32. Kg2 Rb5 33. c4 Ra5 34. Kf3 Kf7 35. Ke4 g6 36. Rd2 Rxd2 37. Bxd2 Ra6 38. Be3 Rc6 39. Nc3 h5 40. h3 Ke8 41. g4 hxg4 42. hxg4 Kd7 43. f5 gxf5+ 44. gxf5 exf5+ 45. Kxf5 Ra6 46. Na4 Rc6 47. Nc3 Ra6 48. Bf2 Rh6 49. Nd5 Rh2 50. Be3 Rxa2 51. e6+ Ke8 52. Nxe7 Kxe7 53. Bxc5+ Ke8 54. Ke5 a5 55. Kd4 a4 56. bxa4 Rxa4 57. Bd6 Ra1 58. Kd5 Rd1+ 59. Kc6 Re1 60. e7 Rc1 61. c5 Rb1 62. Kc7 Rb2 63. c6 Rb1 64. Ba3 Rb3 65. Bc5 Rb1 66. Kd6 Rd1+ 67. Ke6 Re1+ 68. Kd5 Rd1+ 69. Kc4 Re1 70. Bb4 Re2 71. Kb5 Re4 72. Bc5 Re2 73. Kb6 Rb2+ 74. Ka6 Rc2 1/2-1/2

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.11.01"]
[Round "7"]
[White "Donoso Velasco, Pedro H"]
[Black "Wong, Sheldon MA"]
[Result "1-0"]
[ECO "B92"]
[WhiteElo "2405"]
[PlyCount "121"]
[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 "Chile"]
[BlackTeam "Jamaica"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "JAM"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. 0-0 Nbd7 9. a4 b6 10. Be3 Bb7 11. f3 0-0 12. Rf2 Ne8 13. Bc4 Kh8 14. Rd2 Bg5 15. Qe2 f5 16. exf5 Rxf5 17. Be6 Bxe3+ 18. Qxe3 Rf6 19. Bxd7 Qxd7 20. Qxe5 Re6 21. Qf4 Qe7 22. Rad1 Rf6 23. Re2 Qf7 24. Qd2 Rg6 25. Nd4 Nf6 26. Rde1 Ng8 27. Ne4 Rf8 28. b3 Qe7 29. Ng3 Qd7 30. Re6 Rxe6 31. Rxe6 Ne7 32. Qb4 Nc8 33. Qe1 Bd5 34. Re3 b5 35. axb5 axb5 36. Ne6 Re8 37. Nf4 Rxe3 38. Qxe3 Bf7 39. Ne4 Qf5 40. Nd3 h6 41. Qd4 Qd7 42. Ne5 Qe6 43. Nxd6 Be8 44. Nxe8 Qxe8 45. f4 Ne7 46. h3 Nf5 47. Qe4 Qe6 48. Qc6 Qxc6 49. Nxc6 Kg8 50. Kf2 Kf7 51. g4 Nd6 52. Ke3 Ke6 53. Kd4 Nb7 54. Ne5 h5 55. Nd3 hxg4 56. hxg4 Kd6 57. f5 Nd8 58. Ne5 Nb7 59. b4 Ke7 60. Kd5 Kf6 61. Nf3 1-0

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.10.31"]
[Round "6"]
[White "Pritchett, Craig William"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "2405"]
[BlackElo "2405"]
[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 "Scotland"]
[BlackTeam "Chile"]
[WhiteTeamCountry "SCO"]
[BlackTeamCountry "CHI"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nb7 9. c4 0-0 10. Nc3 Nc5 11. Nd4 f6 12. Bf4 fxe5 13. Bxe5 Bf6 14. Bxf6 Qxf6 15. Rad1 a5 16. Qh5 Ne6 17. Ne4 Qe7 18. Nxe6 Qxe6 19. Ng5 Qh6 20. Qxh6 gxh6 21. Ne4 d6 22. Rfe1 Rb8 23. b3 a4 24. Re3 Bf5 25. Nd2 Rfe8 26. Rde1 Rxe3 27. Rxe3 Kf7 28. f3 axb3 29. axb3 Ra8 30. Kf2 Ra2 31. Ke2 c5 32. g4 Bc2 33. Rc3 h5 34. gxh5 Kf6 35. h4 c6 36. Re3 Bf5 37. Re8 d5 38. Ke3 d4+ 39. Kf4 Rxd2 40. Rf8+ Ke6 41. Rxf5 Re2 42. Rxc5 Kd6 43. Rg5 d3 44. Rg8 d2 45. Rd8+ Kc5 46. Rd3 Kb4 47. Kg5 Ka3 48. Kh6 Kb2 49. Kxh7 Kc2 50. Rd8 Re3 51. Rxd2+ Kxd2 52. h6 Rxf3 53. Kg7 Rg3+ 54. Kf7 Rf3+ 55. Kg7 1/2-1/2

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.10.28"]
[Round "4"]
[White "Donoso Velasco, Pedro H"]
[Black "Andersson, Ulf"]
[Result "0-1"]
[ECO "B42"]
[WhiteElo "2405"]
[BlackElo "2545"]
[PlyCount "102"]
[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 "Chile"]
[BlackTeam "Sweden"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "SWE"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 g6 6. 0-0 Bg7 7. Nb3 d6 8. Nc3 Nf6 9. f4 0-0 10. Qf3 Qc7 11. Bd2 Nc6 12. Rae1 b5 13. Kh1 Bb7 14. a4 bxa4 15. Nxa4 Rab8 16. Qe2 Ba8 17. e5 Nd5 18. exd6 Qxd6 19. Nac5 a5 20. Ne4 Qc7 21. Bb5 Bxb2 22. c4 Nf6 23. Nec5 Nd4 24. Nxd4 Qxc5 25. Nb3 Qa3 26. Nxa5 Ne4 27. Nc6 Bxc6 28. Bxc6 Nxd2 29. Qxd2 Bc3 30. Qc1 Qb4 31. Re2 Qxc4 32. Bf3 Qb4 33. g3 Bf6 34. Qe3 Rfd8 35. Kg2 Rd7 36. Qe4 Rd4 37. Qc2 Rbd8 38. Rb1 Qa5 39. Rb7 R4d7 40. Rxd7 Rxd7 41. h4 h5 42. Qe4 Kg7 43. Kh3 Rd4 44. Qc2 Qa3 45. Rf2 Rd3 46. Qc6 Rc3 47. Qe4 Re3 48. Qc6 Qd3 49. Kg2 Bd4 50. Rf1 Re2+ 51. Kh1 Rc2 0-1

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.10.27"]
[Round "3"]
[White "Donoso Velasco, Pedro H"]
[Black "Suradiradja, Herman"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "2405"]
[BlackElo "2330"]
[PlyCount "53"]
[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 "Chile"]
[BlackTeam "Indonesia"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "INA"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf5 d5 7. exd5 Bxf5 8. dxc6 bxc6 9. Qf3 Qd7 10. Bc4 Bxc2 11. 0-0 Be7 12. Qe2 Bg6 13. Qxe5 0-0 14. Bf4 Rfe8 15. Rad1 Qb7 16. Bb3 Ba3 17. Qa5 Bb4 18. Qc7 Qa6 19. Be3 Ba5 20. Qf4 Bd3 21. Rfe1 Bxc3 22. bxc3 Re4 23. Qd6 Bc4 24. Bd4 Rae8 25. Rxe4 Nxe4 26. Qd7 Rb8 27. Qg4 1-0

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.10.26"]
[Round "2"]
[White "Huebner, Robert"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "D45"]
[WhiteElo "2595"]
[BlackElo "2405"]
[PlyCount "85"]
[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 "Germany"]
[BlackTeam "Chile"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "CHI"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 c6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 0-0 8. Bb2 Qe7 9. Be2 dxc4 10. bxc4 e5 11. 0-0 Re8 12. Rfe1 b6 13. a4 a5 14. Rab1 Ba6 15. Ba1 Bc7 16. g3 Rab8 17. Bf1 Qf8 18. Ne2 c5 19. dxe5 Nxe5 20. Nxe5 Bxe5 21. Bxe5 Rxe5 22. Nc3 Qe8 23. e4 Qc6 24. f4 Ree8 25. Bg2 Bb7 26. Red1 Ng4 27. Qe2 f5 28. h3 Nf6 29. e5 Ne4 30. Nxe4 fxe4 31. Rd6 Qc7 32. Rbxb6 e3 33. Rb5 Bxg2 34. Kxg2 Rbd8 35. Rd5 Qc6 36. Rbxc5 Qxa4 37. Rxa5 Qb3 38. Kf3 Rc8 39. Rab5 Qc3 40. c5 Red8 41. Rd6 Qc1 42. Kg4 Rf8 43. Rd1 1-0

[Event "Olympiad-23"]
[Site "Buenos Aires"]
[Date "1978.10.25"]
[Round "1"]
[White "Donoso Velasco, Pedro H"]
[Black "Weeramantry, Sunil"]
[Result "1-0"]
[ECO "B08"]
[WhiteElo "2405"]
[PlyCount "85"]
[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 "Chile"]
[BlackTeam "Sri Lanka"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "SRI"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 0-0 6. 0-0 Bg4 7. Be3 Nc6 8. Qd2 e5 9. dxe5 dxe5 10. Rad1 Qc8 11. h3 Bxf3 12. Bxf3 Rd8 13. Qc1 Rxd1 14. Rxd1 Qf8 15. Nb5 Rc8 16. c3 a6 17. Na3 Rd8 18. b4 b6 19. Nc4 Rxd1+ 20. Qxd1 Bh6 21. Qa4 Nb8 22. Bxh6 Qxh6 23. Qd1 Nbd7 24. a4 Qf8 25. a5 b5 26. Ne3 Qd6 27. Qxd6 cxd6 28. c4 bxc4 29. Nxc4 d5 30. exd5 e4 31. Bg4 Nb8 32. Nb6 Nxg4 33. hxg4 Kf8 34. Kf1 Ke7 35. Ke2 Kd6 36. Ke3 Ke5 37. g5 Kf5 38. Kd4 Kxg5 39. Kxe4 Kf6 40. Na4 Ke7 41. Nc5 Kd6 42. Kd4 f5 43. b5 1-0

[Event "Clarin-B"]
[Site "Buenos Aires"]
[Date "1978.??.??"]
[Round "10"]
[White "Bulcourf, Carlos"]
[Black "Donoso Velasco, Pedro H"]
[Result "0-1"]
[ECO "A15"]
[WhiteElo "2220"]
[BlackElo "2405"]
[PlyCount "96"]
[EventDate "1978.11.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. b4 Nf6 2. Bb2 g6 3. c4 Bg7 4. e3 0-0 5. Be2 c6 6. Nf3 a5 7. b5 cxb5 8. cxb5 d6 9. 0-0 Nbd7 10. Nc3 Nb6 11. Na4 e5 12. d4 e4 13. Nd2 Be6 14. Nxb6 Qxb6 15. Qa4 Rfc8 16. Rfc1 Qd8 17. Rxc8 Rxc8 18. Rc1 Rxc1+ 19. Bxc1 Qc7 20. Bb2 b6 21. Bd1 d5 22. Qc2 Qd6 23. Nb1 Qb4 24. Nc3 Bf8 25. Qb3 Qd6 26. Na4 Ng4 27. g3 h5 28. a3 Bd7 29. Be2 Bh6 30. Nxb6 Qxb6 31. Qxd5 Qf6 32. Bxg4 Bxg4 33. Qxe4 Qf3 34. Qxf3 Bxf3 35. Kf1 f5 36. Ke1 Kf7 37. a4 Bg5 38. h3 Ke6 39. g4 fxg4 40. hxg4 h4 41. Kf1 Bd8 42. e4 Bxe4 43. f4 Bc7 44. Bc1 Kd5 45. Kg1 g5 46. b6 Bxb6 47. fxg5 Bc7 48. g6 Ke6 0-1

[Event "Clarin-B"]
[Site "Buenos Aires"]
[Date "1978.??.??"]
[Round "3"]
[White "Donoso Velasco, Pedro H"]
[Black "Anelli, Antonio"]
[Result "1/2-1/2"]
[ECO "B67"]
[WhiteElo "2405"]
[BlackElo "2325"]
[PlyCount "77"]
[EventDate "1978.11.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8. 0-0-0 Bd7 9. f4 h6 10. Bh4 Nxe4 11. Qe1 Nf6 12. Nf5 Qa5 13. Nxd6+ Bxd6 14. Rxd6 0-0-0 15. Rd1 Kb8 16. Be2 Ne7 17. Bf3 Nf5 18. Bxf6 gxf6 19. Kb1 Qc7 20. g3 Ne7 21. Qf2 f5 22. Qe2 Bc8 23. Rxd8 Rxd8 24. Rd1 f6 25. Rxd8 Qxd8 26. Qe3 Qd6 27. a3 e5 28. Bh5 Be6 29. Kc1 Nd5 30. Qd2 Kc7 31. Nxd5+ Qxd5 32. Qxd5 Bxd5 33. Kd2 Kd6 34. Ke3 Kc5 35. Be2 a5 36. Bd3 Be6 37. Be2 Bd5 38. Bd3 Be6 39. Be2 1/2-1/2

[Event "Clarin-B"]
[Site "Buenos Aires"]
[Date "1978.??.??"]
[Round "11"]
[White "Donoso Velasco, Pedro H"]
[Black "Borghi, Humberto"]
[Result "0-1"]
[ECO "C63"]
[WhiteElo "2405"]
[PlyCount "118"]
[EventDate "1978.11.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[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 f5 4. Nc3 fxe4 5. Nxe4 Nf6 6. Nxf6+ Qxf6 7. 0-0 Nd4 8. Nxd4 exd4 9. Re1+ Be7 10. Qh5+ g6 11. Qe5 Qxe5 12. Rxe5 c6 13. Bf1 Kf7 14. d3 d5 15. Bd2 Bd6 16. Ree1 Bd7 17. g3 a5 18. a4 b6 19. Bg2 Rhe8 20. f4 Kf6 21. Bf3 Rac8 22. b3 Be6 23. Re2 Bf7 24. Rxe8 Bxe8 25. Re1 Bf7 26. Bc1 Bb4 27. Re5 Re8 28. Rxe8 Bxe8 29. Kf2 Bf7 30. g4 b5 31. Bb2 Bc3 32. g5+ Ke7 33. Ba3+ Kd7 34. Bg4+ Kc7 35. Bc5 bxa4 36. bxa4 Kb7 37. Kf3 Bb4 38. Bxd4 c5 39. Bb2 c4 40. Bd4 c3 41. Bd7 Kc7 42. Bb5 Be6 43. h4 Kd6 44. Ke3 Bg4 45. Be5+ Ke6 46. Kd4 Bd1 47. Bc6 Bxc2 48. Bxd5+ Kf5 49. Bc6 Bb3 50. Ke3 Kg4 51. Bd4 Kxh4 52. Ke2 c2 53. Bb2 Kg3 54. d4 Bd6 55. Kd3 Bxf4 56. Kc3 Bxa4 57. Bxa4 c1Q+ 58. Bxc1 Bxc1 59. Bb3 Bxg5 0-1

[Event "Clarin-B"]
[Site "Buenos Aires"]
[Date "1978.??.??"]
[Round "9"]
[White "Donoso Velasco, Pedro H"]
[Black "Garcia, Raimundo"]
[Result "1/2-1/2"]
[ECO "C79"]
[WhiteElo "2405"]
[BlackElo "2435"]
[PlyCount "32"]
[EventDate "1978.11.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[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 a6 4. Ba4 d6 5. c3 Bd7 6. d4 g6 7. 0-0 Bg7 8. Re1 Nf6 9. Bg5 h6 10. Bh4 0-0 11. Nbd2 Qe8 12. Bb3 Nh5 13. Nc4 Bg4 14. dxe5 Nxe5 15. Ncxe5 dxe5 16. h3 Be6 1/2-1/2

[Event "Clarin-B"]
[Site "Buenos Aires"]
[Date "1978.??.??"]
[Round "7"]
[White "Donoso Velasco, Pedro H"]
[Black "Link, Hugo E"]
[Result "1-0"]
[ECO "B45"]
[WhiteElo "2405"]
[PlyCount "51"]
[EventDate "1978.11.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 Bb4 7. Bf4 Nxe4 8. Qf3 d5 9. Nc7+ Kf8 10. 0-0-0 Bxc3 11. bxc3 Qf6 12. Nxa8 e5 13. Rxd5 Be6 14. Qxe4 Bxd5 15. Qxd5 Qxf4+ 16. Kb2 g6 17. g3 Qf6 18. Nc7 Kg7 19. Bc4 Rd8 20. Qc5 b6 21. Qb5 Na5 22. Rd1 Rc8 23. Rd7 a6 24. Qd5 Nxc4+ 25. Qxc4 b5 26. Ne6+ 1-0

[Event "Clarin-B"]
[Site "Buenos Aires"]
[Date "1978.??.??"]
[Round "15"]
[White "Donoso Velasco, Pedro H"]
[Black "Lofiego"]
[Result "1-0"]
[ECO "C14"]
[WhiteElo "2405"]
[PlyCount "119"]
[EventDate "1978.11.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4 0-0 8. Qd2 c5 9. Nf3 Nc6 10. g3 f5 11. exf6 Nxf6 12. 0-0-0 Bd7 13. Bg2 b5 14. dxc5 b4 15. Ne2 Ne4 16. Qe3 Qxc5 17. Qxc5 Nxc5 18. Ned4 Nxd4 19. Nxd4 g6 20. Rhe1 Rac8 21. Re3 Kg7 22. Rde1 Rfe8 23. b3 a6 24. Kb2 h6 25. h4 h5 26. a3 bxa3+ 27. Kxa3 Kf6 28. b4 Na4 29. Kb3 Nb6 30. Bf1 Nc4 31. Bxc4 Rxc4 32. c3 Rcc8 33. Ra1 Bb5 34. Kc2 Rb8 35. Kd2 Rb6 36. Rae1 Bc4 37. Re5 Bb5 38. R1e3 Bd7 39. Nb3 Bb5 40. Nc5 Rd6 41. Re1 Rb6 42. Ke3 Re7 43. Kd4 Re8 44. Rg1 Rh8 45. Rg5 Rh7 46. Ra1 Re7 47. Re5 Rf7 48. Ra5 Re7 49. Re1 Rc6 50. Rea1 Rec7 51. Ke3 Kf5 52. Kf3 Re7 53. Re1 e5 54. fxe5 Rxe5 55. Raa1 Bc4 56. Rxe5+ Kxe5 57. Re1+ Kf5 58. Re8 a5 59. Nd7 axb4 60. Re5# 1-0

[Event "Clarin-B"]
[Site "Buenos Aires"]
[Date "1978.??.??"]
[Round "13"]
[White "Donoso Velasco, Pedro H"]
[Black "Morovic Fernandez, Ivan"]
[Result "1/2-1/2"]
[ECO "B49"]
[WhiteElo "2405"]
[PlyCount "48"]
[EventDate "1978.11.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be2 a6 7. 0-0 Nf6 8. Be3 Bb4 9. Na4 0-0 10. Nxc6 bxc6 11. Nb6 Rb8 12. Nxc8 Rfxc8 13. Bxa6 Rd8 14. Bd3 Bd6 15. Kh1 Be5 16. c3 Rxb2 17. Qc1 Ng4 18. f4 Nxe3 19. Qxb2 Bxf4 20. Qf2 Nxf1 21. Rxf1 e5 22. g3 Qd6 23. Bc4 Bg5 24. Qxf7+ Kh8 1/2-1/2

[Event "Clarin-B"]
[Site "Buenos Aires"]
[Date "1978.??.??"]
[Round "5"]
[White "Donoso Velasco, Pedro H"]
[Black "Tempone, Marcelo"]
[Result "1-0"]
[ECO "D34"]
[WhiteElo "2405"]
[PlyCount "113"]
[EventDate "1978.11.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 c5 3. c4 e6 4. cxd5 exd5 5. Nc3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. 0-0 0-0 9. Bg5 cxd4 10. Nxd4 h6 11. Be3 Re8 12. Nxc6 bxc6 13. Na4 Bf5 14. Rc1 Qd7 15. Bc5 Be4 16. f3 Bg6 17. e3 Rab8 18. Qd4 Bxc5 19. Nxc5 Qe7 20. Rfe1 Rb6 21. b4 Nd7 22. Nxd7 Qxd7 23. a3 Bf5 24. Rc5 Qe7 25. Kf2 Bd7 26. Ra5 Be6 27. Rc1 Reb8 28. Bf1 R8b7 29. Rac5 Bd7 30. Bd3 Rb8 31. Ra5 R8b7 32. Rc3 Qd8 33. h4 Bc8 34. Rac5 Qd7 35. Qxd5 Qxd5 36. Rxd5 Rd7 37. Rdc5 Ba6 38. Bxa6 Rxa6 39. Ke2 Rd6 40. e4 f6 41. h5 Kf7 42. b5 cxb5 43. Rxb5 Rd7 44. Ke3 g5 45. hxg6+ Kxg6 46. Rbc5 Rdd6 47. g4 Ra4 48. Kf4 Rda6 49. Rc8 h5 50. R3c7 hxg4 51. Rg8+ Kh6 52. Rc1 Kh7 53. Rxg4 f5 54. Rh1+ Rh6 55. Rxh6+ Kxh6 56. Kxf5 Rxa3 57. f4 1-0

[Event "Clarin-B"]
[Site "Buenos Aires"]
[Date "1978.??.??"]
[Round "8"]
[White "Foguelman, Alberto"]
[Black "Donoso Velasco, Pedro H"]
[Result "0-1"]
[ECO "C71"]
[WhiteElo "2335"]
[BlackElo "2405"]
[PlyCount "36"]
[EventDate "1978.11.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[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 a6 4. Ba4 d6 5. d4 b5 6. Bb3 Nxd4 7. Nxd4 exd4 8. c3 Bb7 9. 0-0 Nf6 10. Re1 Be7 11. Bg5 dxc3 12. Nxc3 0-0 13. f4 b4 14. Nb1 Nxe4 15. Bxe7 Qxe7 16. Bd5 Bxd5 17. Qxd5 Rae8 18. Qc6 Qf6 0-1

[Event "Clarin-B"]
[Site "Buenos Aires"]
[Date "1978.??.??"]
[Round "12"]
[White "Giardelli, Sergio Carlos"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "A14"]
[WhiteElo "2315"]
[BlackElo "2405"]
[PlyCount "67"]
[EventDate "1978.11.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 e6 3. Nf3 d5 4. Bg2 Be7 5. 0-0 0-0 6. b3 b6 7. Bb2 Bb7 8. cxd5 Nxd5 9. Na3 c5 10. Nc4 Nc6 11. Rc1 Rc8 12. d4 cxd4 13. Nxd4 Nxd4 14. Qxd4 Bf6 15. Ne5 Rxc1 16. Rxc1 Qb8 17. e4 Ne7 18. Qb4 Bxe5 19. Bxe5 Qxe5 20. Qxe7 Bxe4 21. Bxe4 Qxe4 22. Qxa7 Qd4 23. Qb7 h5 24. h4 g6 25. Rc4 Qa1+ 26. Kh2 Qxa2 27. Qxb6 e5 28. Rc7 Kg7 29. Qe3 Qb2 30. Rb7 Qd4 31. Qf3 e4 32. Qf4 Qd5 33. Re7 Qxb3 34. Qxe4 1/2-1/2

[Event "Clarin-B"]
[Site "Buenos Aires"]
[Date "1978.??.??"]
[Round "6"]
[White "Hase, Juan Carlos"]
[Black "Donoso Velasco, Pedro H"]
[Result "0-1"]
[ECO "C22"]
[WhiteElo "2410"]
[BlackElo "2405"]
[PlyCount "42"]
[EventDate "1978.11.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. d4 exd4 4. Qxd4 Nc6 5. Qe3 Bb4 6. Bd2 0-0 7. 0-0-0 Re8 8. Bc4 Na5 9. Be2 d5 10. Qg5 d4 11. e5 Ng4 12. Qxd8 Rxd8 13. Bg5 Nxf2 14. Bxd8 dxc3 15. Bxc7 Nxd1 16. Bxd1 Nc4 17. Be2 cxb2+ 18. Kb1 Be6 19. Nf3 Na3+ 20. Kxb2 Rc8 21. Rd1 Rxc7 0-1

[Event "Clarin-B"]
[Site "Buenos Aires"]
[Date "1978.??.??"]
[Round "4"]
[White "Olivera, Horacio"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "E75"]
[BlackElo "2405"]
[PlyCount "60"]
[EventDate "1978.11.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. Be2 0-0 6. Bg5 c5 7. d5 e6 8. Qd2 exd5 9. exd5 Re8 10. Nf3 Bg4 11. 0-0 Nbd7 12. Rfe1 Qb6 13. h3 Bxf3 14. Bxf3 a6 15. Rab1 Rxe1+ 16. Rxe1 Re8 17. Rxe8+ Nxe8 18. Nd1 Qb4 19. Be2 Bd4 20. Kf1 Nef6 21. Qc2 Qa5 22. b3 Kg7 23. Bd2 Qd8 24. Nc3 Qe7 25. Bd3 Ne5 26. Ne2 Nxd3 27. Qxd3 Qe4 28. Qxe4 Nxe4 29. Be1 Be5 30. f3 Nf6 1/2-1/2

[Event "Clarin-B"]
[Site "Buenos Aires"]
[Date "1978.??.??"]
[Round "14"]
[White "Paglilla, Carlos"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "C28"]
[WhiteElo "2275"]
[BlackElo "2405"]
[PlyCount "78"]
[EventDate "1978.11.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6 4. d3 Bb4 5. Bd2 0-0 6. Nf3 d6 7. h3 Be6 8. Bb3 Kh8 9. Ne2 Bc5 10. Ng3 h6 11. 0-0 Bb6 12. c3 Rg8 13. Nh2 Qd7 14. Qf3 Nh7 15. Ba4 Raf8 16. Rad1 f6 17. Bb3 Bxb3 18. axb3 Qf7 19. b4 Ng5 20. Bxg5 fxg5 21. Qxf7 Rxf7 22. Ng4 Rgf8 23. Rd2 a6 24. Re1 g6 25. Ne3 Kg7 26. Ngf1 Nd8 27. g3 Ne6 28. Kg2 h5 29. Nd1 c6 30. Nfe3 Bc7 31. Rc2 b5 32. Nf1 a5 33. bxa5 Bxa5 34. b4 Bb6 35. Ra2 Nc7 36. Ree2 Kf6 37. Rec2 Ra8 38. Rxa8 Nxa8 39. c4 Bd4 1/2-1/2

[Event "Clarin-B"]
[Site "Buenos Aires"]
[Date "1978.??.??"]
[Round "1"]
[White "Varga, Mariano"]
[Black "Donoso Velasco, Pedro H"]
[Result "0-1"]
[ECO "B22"]
[BlackElo "2405"]
[PlyCount "74"]
[EventDate "1978.11.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. c3 e6 3. d4 d5 4. exd5 exd5 5. Nf3 Nc6 6. Be2 Bd6 7. 0-0 Nge7 8. dxc5 Bxc5 9. Nbd2 0-0 10. Nb3 Bb6 11. Nfd4 Nf5 12. Bf3 Qf6 13. Nxf5 Bxf5 14. Be3 Be4 15. Bxe4 dxe4 16. Bxb6 axb6 17. Qd5 Rfe8 18. Rfe1 Re5 19. Qd7 Re7 20. Qg4 Rae8 21. Re3 Qe5 22. f4 Qb5 23. f5 f6 24. Rae1 Ne5 25. Qh4 Nd3 26. Rh3 Qxf5 27. Nd4 Qg6 28. Rg3 Qf7 29. Nf5 g5 30. Qh3 Nf4 31. Nxe7+ Qxe7 32. Qf5 Qd6 33. Qb5 Re5 34. Qf1 Nd3 35. Re2 Qc5+ 36. Kh1 Rf5 37. Qd1 Qf2 0-1

[Event "Clarin-B"]
[Site "Buenos Aires"]
[Date "1978.??.??"]
[Round "2"]
[White "Volman, Horacio"]
[Black "Donoso Velasco, Pedro H"]
[Result "0-1"]
[ECO "E61"]
[BlackElo "2405"]
[PlyCount "78"]
[EventDate "1978.11.??"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 0-0 5. e3 c5 6. Nge2 d6 7. 0-0 Nbd7 8. d4 a6 9. h3 Rb8 10. a4 e6 11. e4 cxd4 12. Nxd4 Qc7 13. b3 Nc5 14. Be3 Rd8 15. Rc1 e5 16. Nde2 a5 17. Bg5 Be6 18. Kh2 h6 19. Bxf6 Bxf6 20. f4 exf4 21. gxf4 Bg7 22. Ng3 h5 23. Nb5 Qe7 24. f5 h4 25. Ne2 Bd7 26. fxg6 fxg6 27. Nf4 Be5 28. Kh1 Kg7 29. Nd3 Bc6 30. Nxc5 dxc5 31. Qg4 Rd3 32. Rf3 Rbd8 33. Bf1 Rxf3 34. Qxf3 Qg5 35. Re1 Qd2 36. Re2 Qd1 37. Nc3 Qxb3 38. Rf2 Qxc3 39. Qf6+ Kh6 0-1

[Event "Pan American-ch 2nd"]
[Site "Santa Cruz"]
[Date "1977.11.02"]
[Round "15"]
[White "Donoso Velasco, Pedro H"]
[Black "Garcia, Gildardo"]
[Result "1/2-1/2"]
[ECO "D43"]
[WhiteElo "2400"]
[BlackElo "2340"]
[PlyCount "33"]
[EventDate "1977.11.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "BOL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Bg5 h6 5. Bxf6 Qxf6 6. Nc3 c6 7. e3 Nd7 8. cxd5 exd5 9. Bd3 Bd6 10. 0-0 0-0 11. Qc2 Qd8 12. e4 dxe4 13. Nxe4 Nf6 14. Rfe1 Nd5 15. a3 Be6 16. Ne5 Nf4 17. Bc4 1/2-1/2

[Event "Pan American-ch 2nd"]
[Site "Santa Cruz"]
[Date "1977.11.??"]
[Round "1"]
[White "Camaton Borbor, Carlos"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "A16"]
[WhiteElo "2240"]
[BlackElo "2400"]
[PlyCount "61"]
[EventDate "1977.11.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "BOL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 0-0 5. d3 c6 6. Nf3 d5 7. cxd5 cxd5 8. 0-0 Nc6 9. Bd2 d4 10. Na4 e5 11. Bg5 h6 12. Bxf6 Qxf6 13. Rc1 Qe7 14. a3 Nd8 15. Qd2 Ne6 16. Qb4 Re8 17. Qxe7 Rxe7 18. Nd2 Rb8 19. Rfd1 Bd7 20. Nc5 Nxc5 21. Rxc5 Be6 22. Rdc1 b6 23. Rc7 Rbe8 24. Ne4 Rxc7 25. Rxc7 Rc8 26. Rxc8+ Bxc8 27. Nd6 Bd7 28. Bb7 Kf8 29. Nc8 Bxc8 30. Bxc8 Ke7 31. Ba6 1/2-1/2

[Event "Pan American-ch 2nd"]
[Site "Santa Cruz"]
[Date "1977.11.??"]
[Round "9"]
[White "De Leon, Otto"]
[Black "Donoso Velasco, Pedro H"]
[Result "0-1"]
[ECO "B44"]
[BlackElo "2400"]
[PlyCount "72"]
[EventDate "1977.11.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "BOL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5 d6 6. Be3 Nf6 7. Bd3 a6 8. Nd4 Be7 9. Nxc6 bxc6 10. 0-0 e5 11. c4 0-0 12. Nc3 Be6 13. Qe2 a5 14. Rad1 Qc7 15. h3 g6 16. Rd2 Nh5 17. b3 Nf4 18. Qf3 Nxd3 19. Rxd3 f5 20. Qe2 a4 21. f3 f4 22. Bf2 axb3 23. axb3 Rfb8 24. Qc2 g5 25. Rfd1 h5 26. Ne2 g4 27. hxg4 hxg4 28. g3 gxf3 29. Rxf3 Bg4 30. Rfd3 f3 31. Nc1 c5 32. Qd2 Kg7 33. Qe3 Qd8 34. Rd5 Qh8 35. Kf1 Qh1+ 36. Bg1 f2 0-1

[Event "Pan American-ch 2nd"]
[Site "Santa Cruz"]
[Date "1977.11.??"]
[Round "14"]
[White "Denker, Arnold Sheldon"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "E67"]
[WhiteElo "2335"]
[BlackElo "2400"]
[PlyCount "133"]
[EventDate "1977.11.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "BOL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 d6 3. Nf3 g6 4. g3 Bg7 5. Bg2 0-0 6. 0-0 Nbd7 7. Nc3 e5 8. Qc2 c6 9. Rd1 Re8 10. b3 Qe7 11. Ba3 exd4 12. Nxd4 Nc5 13. Bb2 a5 14. h3 a4 15. Nxa4 Nxa4 16. bxa4 Ne4 17. Rd3 Nc5 18. Re3 Qd8 19. Rxe8+ Qxe8 20. Nb3 Bf5 21. Qd2 Bxb2 22. Qxb2 Nxa4 23. Qd2 Qe5 24. f4 Qc3 25. g4 Be6 26. Qxd6 Bxc4 27. Rf1 Qe3+ 28. Kh2 Bxe2 29. Re1 Nc3 30. g5 Nd5 31. Qe5 Qxe5 32. fxe5 Bc4 33. Nd2 Bd3 34. Bxd5 cxd5 35. Re3 Bc4 36. a3 b5 37. Nf3 Ra4 38. Nd4 Bf1 39. Nc6 d4 40. Re1 Bc4 41. Nxd4 Rxa3 42. Rb1 Bd3 43. Rb2 Ra8 44. Rb3 Bc4 45. Rb1 Rb8 46. Nc6 Re8 47. Re1 Ra8 48. Rd1 Be6 49. h4 Kf8 50. Kg3 Ke8 51. Rd6 Bd7 52. Nb4 Kd8 53. Nd5 Rb8 54. Nb4 Kc8 55. Kf3 Be6 56. Ke3 Kb7 57. Nc6 Re8 58. Kd4 Kc7 59. Nb4 Bc4 60. Na6+ Kc8 61. Nb4 Re7 62. Rc6+ Rc7 63. Kc5 Kb7 64. Rxc7+ Kxc7 65. Nc2 Bd3 66. Nd4 Kd7 67. Kb4 1/2-1/2

[Event "Pan American-ch 2nd"]
[Site "Santa Cruz"]
[Date "1977.11.??"]
[Round "8"]
[White "Donoso Velasco, Pedro H"]
[Black "Anelli, Antonio"]
[Result "1/2-1/2"]
[ECO "B72"]
[WhiteElo "2400"]
[BlackElo "2290"]
[PlyCount "36"]
[EventDate "1977.11.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "BOL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Be2 0-0 8. f4 d6 9. Nb3 Be6 10. g4 Na5 11. g5 Ne8 12. Qd2 Nc4 13. Bxc4 Bxc4 14. h4 Be6 15. h5 Bg4 16. hxg6 fxg6 17. Qh2 Bxc3+ 18. bxc3 Bh5 1/2-1/2

[Event "Pan American-ch 2nd"]
[Site "Santa Cruz"]
[Date "1977.11.??"]
[Round "11"]
[White "Donoso Velasco, Pedro H"]
[Black "Bademian Orchanian, Jose"]
[Result "1-0"]
[ECO "C81"]
[WhiteElo "2400"]
[BlackElo "2235"]
[PlyCount "129"]
[EventDate "1977.11.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "BOL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

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. Qe2 Be7 10. Rd1 0-0 11. c4 bxc4 12. Bxc4 Bc5 13. Be3 Bxe3 14. Qxe3 Qb8 15. Bb3 Qb6 16. Qxb6 cxb6 17. Nbd2 Nc5 18. Bc2 Nb4 19. Bb1 Nbd3 20. Bxd3 Nxd3 21. Rab1 Rac8 22. Nb3 Nc5 23. Nfd4 Nxb3 24. axb3 Rc5 25. f4 g6 26. Ra1 a5 27. Kf2 Rfc8 28. Ke3 Kf8 29. Kd2 h5 30. Rdc1 Bd7 31. h3 Ke7 32. Rc3 R8c7 33. Rac1 Rc8 34. Rg1 Rh8 35. Re3 Rhc8 36. g4 hxg4 37. hxg4 Rh8 38. f5 Rh2+ 39. Re2 Rxe2+ 40. Kxe2 Rc8 41. Rh1 gxf5 42. gxf5 Bxf5 43. Nxf5+ Ke6 44. Nd4+ Kxe5 45. Ke3 Rg8 46. Rh5+ Kd6 47. Rh6+ Rg6 48. Rh7 Rf6 49. Rh8 Kc5 50. Nc2 Rg6 51. Rc8+ Kd6 52. Nd4 Rg3+ 53. Kf4 Rd3 54. Nb5+ Kd7 55. Rc7+ Ke6 56. Rb7 Rd2 57. Rxb6+ Kd7 58. Ke5 Rxb2 59. Nd4 Ra2 60. Rb7+ Ke8 61. Nf5 a4 62. Kd6 f6 63. Nh6 Kf8 64. Rf7+ Ke8 65. Rg7 1-0

[Event "Pan American-ch 2nd"]
[Site "Santa Cruz"]
[Date "1977.11.??"]
[Round "4"]
[White "Donoso Velasco, Pedro H"]
[Black "Berry, Jonathan"]
[Result "1-0"]
[ECO "C60"]
[WhiteElo "2400"]
[BlackElo "2315"]
[PlyCount "128"]
[EventDate "1977.11.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "BOL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 4. c3 d6 5. d4 Bd7 6. 0-0 Bg7 7. dxe5 dxe5 8. Be3 Nge7 9. Bc5 b6 10. Ba3 Na5 11. Bxd7+ Qxd7 12. Qxd7+ Kxd7 13. Rd1+ Ke8 14. Nbd2 f6 15. b4 Nb7 16. Nc4 b5 17. Na5 Nd6 18. Nd2 Bh6 19. f3 Nec8 20. Ndb3 Nb6 21. Bc1 Bxc1 22. Raxc1 Nbc4 23. Kf2 Rb8 24. Rd5 Rb6 25. Rcd1 Nxa5 26. Nxa5 Ke7 27. Rc5 Kd7 28. a3 c6 29. c4 Rc8 30. cxb5 cxb5 31. Ke3 h5 32. g3 g5 33. Rd3 Rd8 34. f4 exf4+ 35. gxf4 gxf4+ 36. Kxf4 Re8 37. Rd4 Rh8 38. h4 a6 39. Rdd5 Re8 40. Kf3 Re7 41. Nb3 Rc6 42. Nd4 Rb6 43. Nf5 Re5 44. Rxe5 fxe5 45. Rxe5 Nc4 46. Re7+ Kd8 47. Rh7 Nxa3 48. Ne3 Rf6+ 49. Kg3 Nc4 50. Nd5 Rg6+ 51. Kf3 Nd2+ 52. Ke3 Nf1+ 53. Kd4 Ng3 54. Ke5 Rc6 55. Rg7 Ne2 56. Rg5 Rh6 57. Rg8+ Kd7 58. Rg7+ Kd8 59. Rg2 Nc1 60. Rg8+ Kd7 61. Nf6+ Ke7 62. Rg7+ Kd8 63. Kf5 Ne2 64. e5 Nd4+ 1-0

[Event "Pan American-ch 2nd"]
[Site "Santa Cruz"]
[Date "1977.11.??"]
[Round "13"]
[White "Donoso Velasco, Pedro H"]
[Black "Chavez, Romelio"]
[Result "1-0"]
[ECO "B08"]
[WhiteElo "2400"]
[PlyCount "105"]
[EventDate "1977.11.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "BOL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. Nf3 g6 2. e4 Bg7 3. d4 d6 4. Nc3 Nf6 5. Be2 0-0 6. 0-0 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Re8 10. Rad1 Bg4 11. h3 Bxf3 12. Bxf3 c6 13. Rd6 Nfd7 14. Rfd1 Nf8 15. Rd8 Na6 16. Rxe8 Rxe8 17. Be3 b6 18. Be2 Nb8 19. Bc4 Bf6 20. a4 Rd8 21. Rb1 Kg7 22. g3 Be7 23. b4 Nfd7 24. Ne2 f5 25. exf5 gxf5 26. f4 Bf6 27. Rd1 Re8 28. Kf2 h5 29. Bd3 e4 30. Bc4 Be7 31. c3 Nf8 32. a5 b5 33. Bb3 a6 34. Nd4 Kf6 35. Nc2 Nbd7 36. c4 Rc8 37. c5 Kg6 38. Bd4 Nf6 39. Ne3 N6d7 40. Ke2 Nf6 41. Be5 Ne8 42. g4 hxg4 43. hxg4 fxg4 44. Nxg4 Nf6 45. Nxf6 Bxf6 46. Rd6 Nh7 47. Bc2 Kf5 48. Ke3 Bxe5 49. Bxe4+ Kg4 50. fxe5 Ng5 51. Bxc6 Rf8 52. Bd7+ Kg3 53. Rf6 1-0

[Event "Pan American-ch 2nd"]
[Site "Santa Cruz"]
[Date "1977.11.??"]
[Round "2"]
[White "Donoso Velasco, Pedro H"]
[Black "Escondrillas, Carlos"]
[Result "1/2-1/2"]
[ECO "C48"]
[WhiteElo "2400"]
[BlackElo "2265"]
[PlyCount "52"]
[EventDate "1977.11.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "BOL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bb5 Nd4 5. Ba4 Bc5 6. 0-0 Qe7 7. d3 c6 8. Nxd4 Bxd4 9. Be3 Bxe3 10. fxe3 0-0 11. Bb3 d6 12. Qf3 Be6 13. h3 Nd7 14. Ne2 Nc5 15. Ng3 Nxb3 16. axb3 f6 17. Nf5 Bxf5 18. Qxf5 g6 19. Qg4 Kh8 20. Rf2 Rf7 21. Raf1 Raf8 22. Qh4 Qe6 23. c4 f5 24. Qh6 Kg8 25. exf5 Rxf5 26. Rxf5 Rxf5 1/2-1/2

[Event "Pan American-ch 2nd"]
[Site "Santa Cruz"]
[Date "1977.11.??"]
[Round "6"]
[White "Donoso Velasco, Pedro H"]
[Black "Gamarra Caceres, Carlos"]
[Result "1-0"]
[ECO "B38"]
[WhiteElo "2400"]
[PlyCount "55"]
[EventDate "1977.11.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "BOL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. d4 Nf6 5. e4 0-0 6. Be2 d6 7. 0-0 cxd4 8. Nxd4 Nc6 9. Be3 Qa5 10. Nb3 Qd8 11. Rc1 Bd7 12. f3 Rc8 13. Qd2 Re8 14. Rfd1 Ne5 15. Nd5 Nxd5 16. cxd5 Rxc1 17. Rxc1 Qb8 18. f4 Ng4 19. Bxg4 Bxg4 20. f5 gxf5 21. Bh6 Bxh6 22. Qxh6 Kh8 23. h3 Be2 24. Nd4 Qd8 25. Nxe2 Qb6+ 26. Kh1 Qxb2 27. Qe3 Qxa2 28. Qc3+ 1-0

[Event "Pan American-ch 2nd"]
[Site "Santa Cruz"]
[Date "1977.11.??"]
[Round "7"]
[White "Grimaldi, Rene A"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "B89"]
[BlackElo "2400"]
[PlyCount "57"]
[EventDate "1977.11.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "BOL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. Nc3 d6 4. d4 cxd4 5. Nxd4 Nc6 6. Be3 Nf6 7. Bc4 a6 8. Qe2 Qc7 9. Bb3 Na5 10. g4 Be7 11. g5 Nxb3 12. axb3 Nd7 13. Rg1 Ne5 14. f4 Nc6 15. f5 Bd7 16. Qf2 Ne5 17. h4 0-0-0 18. Rg3 d5 19. exd5 Bb4 20. Bd2 exf5 21. Nxf5 Rhe8 22. 0-0-0 g6 23. d6 Qc5 24. Ne7+ Kb8 25. Be3 Qa5 26. Bb6 Qa1+ 27. Nb1 Bg4 28. Rxg4 Nxg4 29. Qf4 1-0

[Event "Pan American-ch 2nd"]
[Site "Santa Cruz"]
[Date "1977.11.??"]
[Round "12"]
[White "Hook, William"]
[Black "Donoso Velasco, Pedro H"]
[Result "0-1"]
[ECO "D10"]
[WhiteElo "2250"]
[BlackElo "2400"]
[PlyCount "60"]
[EventDate "1977.11.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "BOL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Bg5 dxc4 5. e3 b5 6. Bxf6 exf6 7. a4 Qb6 8. d5 b4 9. Nb1 Ba6 10. Qf3 Nd7 11. Qe4+ Ne5 12. dxc6 Bc5 13. Nf3 0-0 14. Nxe5 fxe5 15. a5 Qc7 16. Nd2 Bb5 17. Bxc4 Bxc6 18. Bd5 Bxd5 19. Qxd5 b3 20. Rc1 Rac8 21. Nxb3 Bb4+ 22. Ke2 Qe7 23. Rhd1 Rcd8 24. Qc6 Bd6 25. Rc2 Qe6 26. Nc5 Qg4+ 27. Qf3 Qb4 28. Nb7 e4 29. Qf5 Qxb7 30. Rd5 Qa6+ 0-1

[Event "Pan American-ch 2nd"]
[Site "Santa Cruz"]
[Date "1977.11.??"]
[Round "10"]
[White "Pesantes Carbajal, Carlos"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "D48"]
[WhiteElo "2290"]
[BlackElo "2400"]
[PlyCount "97"]
[EventDate "1977.11.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "BOL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. a4 b4 10. Ne4 c5 11. Nxf6+ Nxf6 12. e4 Bb7 13. e5 Nd7 14. 0-0 cxd4 15. Re1 Nc5 16. Bf1 d3 17. Be3 Rc8 18. Ng5 Be7 19. Qh5 Bxg5 20. Bxg5 Qd5 21. Rad1 0-0 22. Be7 Rfe8 23. Bxc5 Rxc5 24. Rxd3 Qc6 25. Rh3 h6 26. Rg3 f5 27. Qxh6 Qc7 28. Qh5 Rc8 29. Rh3 Rxe5 30. Qh7+ Kf8 31. Rd1 Rd5 32. Rxd5 Bxd5 33. Rg3 Qf7 34. Qh8+ Qg8 35. Qh4 a5 36. h3 Kf7 37. Be2 Qd8 38. Qh7 Qf6 39. Bh5+ Ke7 40. Rxg7+ Kd6 41. Rd7+ Kc6 42. Rb7 Kc5 43. Rc7+ Rxc7 44. Qxc7+ Kd4 45. Qxa5 Qe7 46. Qb6+ Kc4 47. Qe3 Be4 48. b3+ Kd5 49. f3 1-0

[Event "Pan American-ch 2nd"]
[Site "Santa Cruz"]
[Date "1977.11.??"]
[Round "5"]
[White "Van Riemsdijk, Herman Claudius"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "B80"]
[WhiteElo "2385"]
[BlackElo "2400"]
[PlyCount "141"]
[EventDate "1977.11.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "BOL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. g3 a6 7. Bg2 d6 8. 0-0 Bd7 9. Re1 Be7 10. a4 Nf6 11. Nce2 0-0 12. b3 Rac8 13. c4 Rfd8 14. Bb2 Be8 15. Qd2 Nd7 16. Nc2 Bf6 17. Bxf6 Nxf6 18. Nc3 Qb6 19. Ne3 Nb4 20. a5 Qc5 21. Red1 b5 22. axb6 Qxb6 23. Nb5 axb5 24. Qxb4 Qb8 25. Ra6 bxc4 26. Qxb8 Rxb8 27. bxc4 Kf8 28. Raxd6 Rxd6 29. Rxd6 Rb1+ 30. Rd1 Rxd1+ 31. Nxd1 Nd7 32. Kf1 Ke7 33. Ke2 Kd6 34. Kd3 Nc5+ 35. Kc3 f6 36. f3 e5 37. Bf1 Bh5 38. g4 Be8 39. Kb4 h5 40. h3 hxg4 41. hxg4 Bd7 42. Nb2 Kc6 43. Bd3 Kb6 44. Bc2 Na6+ 45. Kc3 Nc5 46. Nd1 Be6 47. Ne3 Kc6 48. Kb4 Kb6 49. Nf1 Na6+ 50. Kc3 Kc5 51. Bb3 Nb4 52. Ng3 g6 53. Nf1 Nc6 54. Ne3 Nd4 55. Bd1 Bf7 56. Nd5 f5 57. Nf6 f4 58. Nd7+ Kd6 59. Nb6 Be8 60. Nd5 Ne6 61. Kb4 Nc5 62. Bc2 Bf7 63. Nc3 Kc6 64. Ba4+ Kb6 65. Nd5+ Bxd5 66. cxd5 Nb7 67. Be8 g5 68. d6 Nxd6 69. Ba4 Nb7 70. Bb3 Nc5 71. Bc2 1/2-1/2

[Event "Pan American-ch 2nd"]
[Site "Santa Cruz"]
[Date "1977.11.??"]
[Round "3"]
[White "Zarco Castillo, Jose"]
[Black "Donoso Velasco, Pedro H"]
[Result "0-1"]
[ECO "E67"]
[BlackElo "2400"]
[PlyCount "76"]
[EventDate "1977.11.15"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "BOL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 0-0 5. Bg2 d6 6. d4 Nbd7 7. 0-0 e5 8. d5 a5 9. e4 Nc5 10. Ne1 Ne8 11. Be3 f5 12. Qd2 Nf6 13. f3 b6 14. Nd3 Bd7 15. Nf2 Nh5 16. exf5 gxf5 17. f4 exf4 18. gxf4 Kh8 19. Nh3 h6 20. Kh1 Qf6 21. Qe2 Qf7 22. Bf3 Nf6 23. Bd4 Rae8 24. Qc2 Nfe4 25. Bxg7+ Qxg7 26. Bh5 Re7 27. Rg1 Qf6 28. Rae1 Rg8 29. Rxg8+ Kxg8 30. Rg1+ Rg7 31. Rxg7+ Qxg7 32. Ne2 Kf8 33. Bf3 c6 34. Bxe4 fxe4 35. Nf2 cxd5 36. cxd5 e3 37. Nd3 Qg6 38. Nec1 Bf5 0-1

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.09"]
[Round "13.4"]
[White "Donoso Velasco, Pedro H"]
[Black "Harandi, Khosro"]
[Result "1-0"]
[ECO "C78"]
[WhiteElo "2385"]
[BlackElo "2380"]
[PlyCount "95"]
[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 "Chile"]
[BlackTeam "Iran"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "IRI"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Bb7 7. Re1 Bc5 8. c3 d6 9. d4 Bb6 10. Bg5 h6 11. Bh4 Qe7 12. Qd3 g5 13. Bg3 0-0-0 14. a4 h5 15. h4 gxh4 16. Bxh4 Rhg8 17. axb5 axb5 18. Nbd2 Rg4 19. g3 Rdg8 20. Bd5 Rxh4 21. Bxc6 Bxc6 22. Nxh4 Ng4 23. Ndf3 Qd7 24. Nf5 Nf6 25. d5 Bb7 26. Kg2 Kb8 27. N3h4 Rd8 28. b3 c6 29. c4 Bc5 30. Qd2 b4 31. Qg5 Ng4 32. Ra2 cxd5 33. cxd5 Rh8 34. f3 f6 35. Qg6 Qb5 36. fxg4 Qd3 37. Ne7 Qxb3 38. Rae2 hxg4 39. Qxf6 Rxh4 40. Qxh4 Qf3+ 41. Kh2 Bf2 42. Nc6+ Bxc6 43. Qd8+ Kb7 44. dxc6+ Ka6 45. Ra2+ Kb5 46. Qa5+ Kxc6 47. Rc1+ Kd7 48. Qc7+ 1-0

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.07"]
[Round "12.2"]
[White "Keene, Raymond"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "D36"]
[WhiteElo "2460"]
[BlackElo "2385"]
[PlyCount "163"]
[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 "England"]
[BlackTeam "Chile"]
[WhiteTeamCountry "ENG"]
[BlackTeamCountry "CHI"]

1. c4 Nf6 2. Nc3 e6 3. d4 d5 4. cxd5 exd5 5. Bg5 Be7 6. e3 c6 7. Bd3 Nbd7 8. Nge2 Nf8 9. Qc2 Ne6 10. Bh4 g6 11. 0-0 Ng7 12. Rab1 Nf5 13. Bxf6 Bxf6 14. b4 a6 15. a4 0-0 16. b5 Bd7 17. bxc6 bxc6 18. Nc1 a5 19. Nb3 Be7 20. Ne2 Bb4 21. Nc5 Bc8 22. Rfd1 Qg5 23. Qc1 Nd6 24. Nf4 Re8 25. Be2 Bf5 26. Rb3 Qe7 27. Nfd3 Bxc5 28. Qxc5 Nc4 29. Qxe7 Rxe7 30. Rdb1 Kf8 31. Rb8+ Rxb8 32. Rxb8+ Re8 33. Rb3 Ra8 34. Nc5 Ke8 35. h3 Nd6 36. Ba6 Bc8 37. Bd3 Kd8 38. Kf1 Kc7 39. Ke1 Ne8 40. Kd2 Nf6 41. Rc3 Nd7 42. e4 Nxc5 43. Rxc5 dxe4 44. Bxe4 Bd7 45. f4 Kb6 46. g4 Re8 47. Kd3 h6 48. h4 Rc8 49. f5 g5 50. Rc1 gxh4 51. Rh1 f6 52. Rxh4 Rh8 53. Rh2 Kc7 54. Bf3 Kd6 55. Rb2 Kc7 56. Rh2 Kd6 57. Rb2 Kc7 58. Ke3 Rb8 59. Rh2 Rh8 60. Kf4 Kd6 61. Rb2 Kc7 62. Kg3 Rb8 63. Rh2 Rh8 64. Rc2 Kd6 65. Rb2 Re8 66. Rb6 Re3 67. Ra6 Kc7 68. Ra7+ Kd6 69. Kf4 Rc3 70. Rxa5 Rc4 71. Ke3 Rc3+ 72. Ke2 Ra3 73. Ra6 Kc7 74. Ra7+ Kd6 75. Ra6 Kc7 76. Ra7+ Kd6 77. Ra8 Ke7 78. Ra6 Kd6 79. d5 Ke5 80. dxc6 Bc8 81. Ra8 Kf4 82. Bd5 1-0

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.06"]
[Round "11.2"]
[White "Donoso Velasco, Pedro H"]
[Black "Hutchings, Stuart James"]
[Result "1/2-1/2"]
[ECO "B84"]
[WhiteElo "2385"]
[BlackElo "2330"]
[PlyCount "60"]
[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 "Chile"]
[BlackTeam "Wales"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "WLS"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6 6. Be2 Qc7 7. 0-0 Nf6 8. Kh1 Be7 9. f4 d6 10. a4 0-0 11. Bf3 Nxd4 12. Qxd4 e5 13. Qf2 exf4 14. Bxf4 Be6 15. Rfd1 Nd7 16. Nd5 Bxd5 17. Rxd5 Ne5 18. Rad1 Rfd8 19. b3 Qc3 20. Qd2 Rdc8 21. Qxc3 Rxc3 22. Bxe5 dxe5 23. Rxe5 Kf8 24. Red5 Rxc2 25. e5 Rac8 26. Rd7 R8c7 27. g3 Ke8 28. Rxc7 Rxc7 29. Bd5 Bb4 30. e6 fxe6 1/2-1/2

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.04"]
[Round "10.2"]
[White "Donoso Velasco, Pedro H"]
[Black "Martin Gonzalez, Angel"]
[Result "1-0"]
[ECO "B72"]
[WhiteElo "2385"]
[PlyCount "53"]
[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 "Chile"]
[BlackTeam "Spain"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "ESP"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. Nb3 0-0 9. f4 Be6 10. g4 Na5 11. g5 Nd7 12. Qd2 Nc4 13. Bxc4 Bxc4 14. 0-0-0 a5 15. h4 a4 16. Nd4 Qa5 17. h5 Rfc8 18. a3 Nc5 19. hxg6 hxg6 20. Rh3 b5 21. Rdh1 b4 22. Qh2 f6 23. f5 Kf8 24. Rh8+ Bg8 25. Rxg8+ Kxg8 26. Qh7+ Kf8 27. Qxg6 1-0

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.03"]
[Round "9.2"]
[White "Donner, Jan Hein"]
[Black "Donoso Velasco, Pedro H"]
[Result "1/2-1/2"]
[ECO "D46"]
[BlackElo "2385"]
[PlyCount "70"]
[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"]
[BlackTeam "Chile"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "CHI"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 Bd6 7. e4 dxe4 8. Nxe4 Nxe4 9. Bxe4 e5 10. 0-0 exd4 11. Qxd4 Nf6 12. Bg5 Be7 13. Qe3 Nxe4 14. Qxe4 Be6 15. Rad1 Qc7 16. Qh4 Rd8 17. b3 h6 18. Rxd8+ Bxd8 19. Bxd8 Qxd8 20. Qe4 0-0 21. h3 Qd6 22. Re1 Rd8 23. Qe3 c5 24. Re2 Qd1+ 25. Kh2 b6 26. Rd2 Rxd2 27. Nxd2 Qc2 28. a4 Kh7 29. Ne4 Bf5 30. Nd6 Qd3 31. Qe7 Bg6 32. f4 Qd4 33. Kg3 Qd3+ 34. Kh2 Qd4 35. Kg3 Qd3+ 1/2-1/2

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.02"]
[Round "8.2"]
[White "Toth, Bela"]
[Black "Donoso Velasco, Pedro H"]
[Result "0-1"]
[ECO "D17"]
[WhiteElo "2405"]
[BlackElo "2385"]
[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 "Italy"]
[BlackTeam "Chile"]
[WhiteTeamCountry "ITA"]
[BlackTeamCountry "CHI"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 dxc4 5. a4 Bf5 6. Ne5 e6 7. Nxc4 c5 8. Be3 cxd4 9. Bxd4 Nc6 10. Bxf6 Qxf6 11. e3 Bb4 12. Rc1 0-0 13. Be2 Rad8 14. Qb3 Bd3 15. Bxd3 Rxd3 16. 0-0 Rfd8 17. Rfd1 Bxc3 18. Rxd3 Rxd3 19. bxc3 Qd8 20. h3 Qd5 21. Qb5 h6 22. Nb2 Rd2 23. c4 Qe5 24. Nd1 Qd6 25. Nc3 Qa3 26. Qb1 Rb2 27. Qa1 Qxa1 28. Rxa1 Rc2 29. Ra3 b6 30. g3 Kf8 31. Kg2 Ke7 32. g4 Na5 33. Nb5 a6 34. Nc7 Nxc4 35. Rb3 Na5 36. Rxb6 Rxc7 37. Rxa6 Nc6 38. Rb6 Kd7 39. Rb2 Ra7 40. Ra2 Ra5 41. f4 Nb4 42. Ra3 Na6 43. Kf3 Nc5 44. Rc3 Kd6 45. e4 Rxa4 46. e5+ 0-1

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.01"]
[Round "7.2"]
[White "Donoso Velasco, Pedro H"]
[Black "Jansson, Borje"]
[Result "1-0"]
[ECO "B84"]
[WhiteElo "2385"]
[BlackElo "2390"]
[PlyCount "119"]
[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 "Chile"]
[BlackTeam "Sweden"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "SWE"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 Be7 7. 0-0 Nc6 8. Kh1 0-0 9. f4 a6 10. a4 Bd7 11. Nb3 b6 12. Bf3 Rb8 13. Qe2 Qc8 14. e5 Ne8 15. Bd2 Nc7 16. Rad1 dxe5 17. fxe5 b5 18. axb5 axb5 19. Bf4 b4 20. Ne4 Nd5 21. Bg3 Na7 22. Nd4 Nb5 23. Qf2 Nxd4 24. Rxd4 Ra8 25. Nd6 Qc5 26. Be4 f5 27. Bxd5 exd5 28. Qd2 Ra2 29. Rxd5 Qc6 30. Bf2 Be6 31. Rc5 Qa6 32. Rd1 Rxb2 33. Bd4 Ra2 34. Rc7 Bd8 35. Ra7 Qc6 36. Rxa2 Bxa2 37. c4 Bb3 38. Rb1 Ba4 39. Qxb4 f4 40. c5 h6 41. Qc4+ Kh8 42. e6 f3 43. Nf7+ Kh7 44. Qd3+ g6 45. Qxf3 Qxf3 46. gxf3 Bc6 47. Kg2 Bd5 48. Nxd8 Rxd8 49. e7 Re8 50. Re1 Kg8 51. Re5 Ba8 52. Re6 Kf7 53. Rf6+ Kxe7 54. Rxg6 Rf8 55. c6 Rc8 56. c7 Kd7 57. Rg7+ Ke6 58. Kg3 Rf8 59. f4 Kf5 60. Rf7+ 1-0

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.10.31"]
[Round "6.2"]
[White "Huss, Andreas"]
[Black "Donoso Velasco, Pedro H"]
[Result "0-1"]
[ECO "D18"]
[BlackElo "2385"]
[PlyCount "46"]
[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 "Switzerland"]
[BlackTeam "Chile"]
[WhiteTeamCountry "SUI"]
[BlackTeamCountry "CHI"]

1. d4 Nf6 2. Nf3 d5 3. c4 c6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. 0-0 0-0 9. Nh4 Nbd7 10. Nxf5 exf5 11. Qc2 g6 12. b3 Nb6 13. Bd3 Nbd5 14. Na2 Bd6 15. f3 Re8 16. e4 fxe4 17. fxe4 Nxe4 18. Bxe4 Qh4 19. g3 Qxe4 20. Qf2 f5 21. Bh6 Qe2 22. Rae1 Qxf2+ 23. Kxf2 Bc7 0-1

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.10.30"]
[Round "5.2"]
[White "Olafsson, Helgi"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "A12"]
[BlackElo "2385"]
[PlyCount "79"]
[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 "Iceland"]
[BlackTeam "Chile"]
[WhiteTeamCountry "ISL"]
[BlackTeamCountry "CHI"]

1. c4 Nf6 2. Nf3 c6 3. g3 d5 4. b3 Bf5 5. Bg2 e6 6. 0-0 Nbd7 7. Bb2 Be7 8. d3 h6 9. Nbd2 0-0 10. a3 a5 11. Qc2 Bh7 12. Bc3 Re8 13. Qb2 Bf8 14. b4 axb4 15. axb4 Qc7 16. Rxa8 Rxa8 17. Ra1 Qd8 18. Ne1 Rxa1 19. Qxa1 Bd6 20. e4 dxe4 21. dxe4 e5 22. Nd3 Bg6 23. f3 Bc7 24. Nf1 Qb8 25. Bh3 Kh7 26. Ne3 Qd8 27. Bf1 Qe8 28. c5 b6 29. Qa7 Bb8 30. Qb7 bxc5 31. bxc5 Qe6 32. Nc1 Ng8 33. Bc4 Qe7 34. Nd3 Qg5 35. Nf1 Ngf6 36. Qxc6 Qh5 37. Nd2 Ba7 38. Qc7 Qg5 39. Qxa7 Qe3+ 40. Kg2 1-0

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.10.28"]
[Round "4.2"]
[White "Donoso Velasco, Pedro H"]
[Black "Bademian Orchanian, Jose"]
[Result "1-0"]
[ECO "C47"]
[WhiteElo "2385"]
[BlackElo "2205"]
[PlyCount "75"]
[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 "Chile"]
[BlackTeam "Uruguay"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "URU"]

1. e4 e5 2. Nc3 Nf6 3. g3 d5 4. exd5 Nxd5 5. Bg2 Be6 6. Nf3 Nc6 7. 0-0 Be7 8. Re1 Nxc3 9. bxc3 f6 10. d4 0-0 11. Qe2 Bg4 12. h3 Bxf3 13. Bxf3 Qd7 14. Qb5 exd4 15. Qd5+ Qxd5 16. Bxd5+ Rf7 17. Kh1 Rd8 18. Bxf7+ Kxf7 19. Rb1 Bd6 20. Bf4 Bxf4 21. gxf4 Rd7 22. Kg2 dxc3 23. Re3 Ne7 24. Rxc3 Nd5 25. Rc4 a6 26. Kf3 Ke7 27. Rxb7 Kd8 28. Rb8+ Ke7 29. Ra4 c5 30. Rxa6 Nb4 31. Rab6 Nxc2 32. R8b7 Nd4+ 33. Ke4 Ne6 34. Rxd7+ Kxd7 35. a4 f5+ 36. Kxf5 Nc7 37. Ke5 c4 38. Rd6+ 1-0

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.10.26"]
[Round "2.2"]
[White "Evans, Larry Melvyn"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "D36"]
[WhiteElo "2540"]
[BlackElo "2385"]
[PlyCount "147"]
[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 "United States"]
[BlackTeam "Chile"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "CHI"]

1. c4 Nf6 2. Nc3 e6 3. Nf3 d5 4. d4 Be7 5. Bg5 h6 6. Bxf6 Bxf6 7. cxd5 exd5 8. e3 0-0 9. Bd3 Re8 10. 0-0 c6 11. Qc2 Nd7 12. b4 a6 13. a4 Nf8 14. b5 Ne6 15. bxc6 bxc6 16. Rab1 Qd6 17. Rfc1 a5 18. Ne2 Bd7 19. Ng3 Ng5 20. Nxg5 Bxg5 21. Bh7+ Kh8 22. Bf5 Bxf5 23. Qxf5 Kg8 24. Rc5 Bd8 25. Rbc1 Re6 26. Rxc6 Qxc6 27. Rxc6 Rxc6 28. Qxd5 Rc1+ 29. Nf1 Rb8 30. g3 Bc7 31. Kg2 Rb2 32. Qa8+ Kh7 33. Qf3 Kg8 34. Qa8+ Kh7 35. Qe8 f6 36. Qe4+ Kg8 37. g4 Rcc2 38. Qf5 Bd6 39. Ng3 Bxg3 40. Kxg3 Re2 41. Qc8+ Kh7 42. Qf5+ Kh8 43. h4 Ra2 44. g5 hxg5 45. hxg5 fxg5 46. Qf7 Ra1 47. Kg2 Rd1 48. Kf3 Red2 49. d5 Rf1 50. Kg2 Rfd1 51. e4 Rd4 52. Kg3 R4d3+ 53. Kh2 Rd4 54. Kg2 Kh7 55. Qh5+ Kg8 56. Qe8+ Kh7 57. Qh5+ Kg8 58. Qg6 R1d2 59. Qxg5 Re2 60. Qd8+ Kh7 61. Qh4+ Kg8 62. Kf3 Ra2 63. Qd8+ Kh7 64. Qxa5 Raxa4 65. Qc3 Rac4 66. Qe3 Rd1 67. Kf4 Rcd4 68. Qh3+ Kg8 69. Ke5 R4d3 70. Qe6+ Kh7 71. Qf5+ Kg8 72. Ke6 R1d2 73. f4 Rd4 74. Qf7+ 1-0

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.10.25"]
[Round "1.2"]
[White "Donoso Velasco, Pedro H"]
[Black "Gutierrez Mangel, Joaquin"]
[Result "1/2-1/2"]
[ECO "C10"]
[WhiteElo "2385"]
[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 "Chile"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "CHI"]
[BlackTeamCountry "CRI"]

1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ Qxf6 6. Nf3 h6 7. Bd3 Bd6 8. Qe2 Nc6 9. Be3 0-0 10. 0-0-0 e5 11. dxe5 Nxe5 12. Nxe5 Bxe5 13. c3 Be6 14. Kb1 Bf5 15. Bxf5 Qxf5+ 16. Qc2 Qxc2+ 17. Kxc2 1/2-1/2

[Event "Zonal Fortaleza"]
[Site "Fortaleza"]
[Date "1975.??.??"]
[Round "15"]
[White "Bravo Sedamanos, Hector"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "D19"]
[PlyCount "83"]
[EventDate "1975.10.18"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "BRA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 c6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. 0-0 0-0 9. Qe2 Nbd7 10. Bd2 Qe7 11. Nh4 Ne4 12. Nxf5 exf5 13. Nxe4 fxe4 14. Bxb4 Qxb4 15. f3 Nf6 16. fxe4 Nxe4 17. Rf4 Qe7 18. Bd3 Ng5 19. Qf2 Rae8 20. Re1 Ne6 21. Rh4 g6 22. Rf1 Qg5 23. Bc4 Kg7 24. Rh3 f5 25. Qd2 h5 26. d5 cxd5 27. Qxd5 Qe7 28. e4 f4 29. Rhf3 Kh6 30. a5 Nc7 31. Qd4 Rd8 32. Qf2 Kg7 33. Rxf4 Rxf4 34. Qxf4 Qc5+ 35. Qf2 Qxf2+ 36. Rxf2 Rd1+ 37. Rf1 Rxf1+ 38. Kxf1 Kf6 39. Ke2 g5 40. Ke3 Ke5 41. Bf7 h4 42. Kf3 1-0

[Event "Zonal Fortaleza"]
[Site "Fortaleza"]
[Date "1975.??.??"]
[Round "5"]
[White "Bronstein, Luis Marcos"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "D67"]
[PlyCount "121"]
[EventDate "1975.10.18"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "BRA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 0-0 6. e3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bf4 Nxf4 11. exf4 Nb6 12. Bd3 Nd5 13. g3 Bd7 14. h4 f5 15. Nxd5 exd5 16. 0-0 Bd6 17. Re1 Qf6 18. Qb3 Rab8 19. Qa4 a6 20. Qa5 Qd8 21. Qc3 Qb6 22. Qc2 g6 23. h5 Rbd8 24. Kg2 Bc8 25. Rh1 Rf6 26. Rh4 Bf8 27. Rch1 Bg7 28. hxg6 hxg6 29. Qc1 Rff8 30. R1h2 c5 31. Qh1 c4 32. Rh8+ Kf7 33. Ng5+ Ke7 34. R2h7 Rxh8 35. Rxg7+ Kd6 36. Nf7+ Kc6 37. Nxh8 Qxd4 38. Rxg6+ Kc7 39. Nf7 cxd3 40. Nxd8 Qe4+ 41. f3 Qe2+ 42. Kh3 Qxb2 43. Qg1 d2 44. Qc5+ Kb8 45. Qd6+ Ka7 46. Qc7 Qc1 47. Nc6+ Qxc6 48. Rxc6 d1Q 49. Qb6+ Kb8 50. Qc7+ Ka7 51. Kh4 Qxf3 52. Qb6+ Kb8 53. Qc7+ Ka7 54. Rg6 Qh1+ 55. Kg5 Qh8 56. Qc5+ Kb8 57. Qxd5 Qh2 58. Qe5+ Ka7 59. Qe3+ Kb8 60. Rg8 Qc2 61. Qe8 1-0

[Event "Zonal Fortaleza"]
[Site "Fortaleza"]
[Date "1975.??.??"]
[Round "16"]
[White "Camara, Helder"]
[Black "Donoso Velasco, Pedro H"]
[Result "0-1"]
[ECO "D02"]
[PlyCount "102"]
[EventDate "1975.10.18"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "BRA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. Bf4 e6 4. e3 c5 5. c3 Nc6 6. Bd3 Qb6 7. Qc2 Bd7 8. Nbd2 Rc8 9. Qb1 Be7 10. h3 0-0 11. 0-0 Rfd8 12. Ne5 Be8 13. g4 g6 14. Ndf3 cxd4 15. exd4 Nxe5 16. Bxe5 Bb5 17. Bxb5 Qxb5 18. Bxf6 Bxf6 19. Qc2 Qc4 20. Qb3 b5 21. Kg2 a5 22. Qd1 b4 23. cxb4 Qxb4 24. Qb3 Rc4 25. Rfd1 Rdc8 26. Qe3 Bg7 27. b3 Rc2 28. Qf4 Qb8 29. Qe3 R8c3 30. Rd3 Qc7 31. a3 Rxd3 32. Qxd3 Qc3 33. Qxc3 Rxc3 34. Rb1 Bf8 35. b4 a4 36. Ra1 Bd6 37. Ra2 Bf4 38. Ne1 Kf8 39. Kf1 Ke7 40. Ke2 Rxh3 41. Nd3 Bd6 42. Nb2 h5 43. gxh5 gxh5 44. Nxa4 h4 45. Ra1 Rb3 46. Nc5 Rb2+ 47. Kf3 h3 48. Nd3 Rb3 49. Ke2 h2 50. f4 Rxa3 51. Rh1 Kf6 0-1

[Event "Zonal Fortaleza"]
[Site "Fortaleza"]
[Date "1975.??.??"]
[Round "17"]
[White "Donoso Velasco, Pedro H"]
[Black "Benitez, Otto"]
[Result "1/2-1/2"]
[ECO "C92"]
[PlyCount "58"]
[EventDate "1975.10.18"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "BRA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[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. h3 Nd7 10. d4 Bf6 11. a4 Na5 12. Bc2 Nb6 13. axb5 axb5 14. Nbd2 Bb7 15. dxe5 dxe5 16. Qe2 Nac4 17. Rxa8 Qxa8 18. Nf1 Qd8 19. Ng3 g6 20. Bd3 c6 21. b3 Nd6 22. Be3 Nd7 23. Rd1 Qe7 24. Bc2 Bc8 25. Qd2 Nb7 26. Nh2 Ndc5 27. Qc1 Rd8 28. Ng4 Bxg4 29. hxg4 Rxd1+ 1/2-1/2

[Event "Zonal Fortaleza"]
[Site "Fortaleza"]
[Date "1975.??.??"]
[Round "6"]
[White "Donoso Velasco, Pedro H"]
[Black "Emma, Jaime"]
[Result "1/2-1/2"]
[ECO "B05"]
[PlyCount "77"]
[EventDate "1975.10.18"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "BRA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 e6 6. 0-0 Be7 7. c4 Nb6 8. exd6 cxd6 9. Be3 0-0 10. Nc3 d5 11. c5 Bxf3 12. Bxf3 Nc4 13. b3 Nxe3 14. fxe3 Nc6 15. a3 Bg5 16. Qd3 Bh6 17. b4 a6 18. g3 f5 19. Bg2 g5 20. b5 axb5 21. Nxb5 g4 22. Rab1 Na5 23. Nd6 Qg5 24. Rfe1 Rfb8 25. Rb6 Bf8 26. Qb5 Bxd6 27. Rxd6 Qe7 28. Bf1 Rd8 29. Rxd8+ Qxd8 30. a4 h5 31. Rb1 h4 32. Qb6 Qxb6 33. Rxb6 hxg3 34. Rxe6 Nc4 35. Bd3 f4 36. exf4 Rxa4 37. Rg6+ Kf7 38. Rxg4 Na5 39. f5 1/2-1/2

[Event "Zonal Fortaleza"]
[Site "Fortaleza"]
[Date "1975.??.??"]
[Round "9"]
[White "Donoso Velasco, Pedro H"]
[Black "Gamarra Caceres, Carlos"]
[Result "1-0"]
[ECO "B92"]
[PlyCount "79"]
[EventDate "1975.10.18"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "BRA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be6 8. f4 Qc7 9. 0-0 Nbd7 10. a4 Be7 11. Kh1 0-0 12. Be3 Rfc8 13. a5 Bc4 14. Bxc4 Qxc4 15. Qf3 d5 16. exd5 e4 17. Qd1 Qc7 18. Nd4 Bb4 19. Nf5 Re8 20. d6 Qd8 21. g4 Re6 22. Ra4 Bc5 23. g5 Bxe3 24. Nxe3 Ne8 25. Rd4 Qxa5 26. f5 Re5 27. Nc4 Qc5 28. b4 Qc6 29. Nxe5 Nxe5 30. Nd5 e3 31. Kg1 Kh8 32. Nxe3 Rd8 33. Ng4 Nxg4 34. Qxg4 Nxd6 35. Rfd1 Qb6 36. Kh1 h6 37. g6 Kg8 38. Qf4 Qc6+ 39. Kg1 Qb6 40. c4 1-0

[Event "Zonal Fortaleza"]
[Site "Fortaleza"]
[Date "1975.??.??"]
[Round "4"]
[White "Donoso Velasco, Pedro H"]
[Black "Panno, Oscar"]
[Result "1/2-1/2"]
[ECO "B84"]
[PlyCount "82"]
[EventDate "1975.10.18"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "BRA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 a6 7. 0-0 Nbd7 8. f4 b5 9. Bf3 Bb7 10. Re1 Rc8 11. a4 bxa4 12. Nxa4 Be7 13. b3 0-0 14. Bb2 Nc5 15. Nc3 Qb6 16. Kh1 Rfd8 17. Qe2 g6 18. Qe3 Bf8 19. f5 e5 20. Nde2 Ncd7 21. Qxb6 Nxb6 22. g4 gxf5 23. gxf5 Bg7 24. Ng3 Rd7 25. Rad1 a5 26. Re2 Bh6 27. Nh5 Nxh5 28. Bxh5 f6 29. Bf3 Bc6 30. Ba3 Bf8 31. Red2 Rcd8 32. Rg2+ Kh8 33. Rdg1 Bh6 34. Nd5 Bxd5 35. exd5 a4 36. bxa4 Nxa4 37. c4 Be3 38. Rb1 Bc5 39. Bc1 Nb6 40. Be2 Ra7 41. Bh6 Bd4 1/2-1/2

[Event "Zonal Fortaleza"]
[Site "Fortaleza"]
[Date "1975.??.??"]
[Round "2"]
[White "Donoso Velasco, Pedro H"]
[Black "Segal, Alexandru Sorin"]
[Result "0-1"]
[ECO "B15"]
[PlyCount "144"]
[EventDate "1975.10.18"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "BRA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nf3 c6 4. Nc3 d5 5. h3 Nf6 6. e5 Ne4 7. Bd3 Nxc3 8. bxc3 c5 9. dxc5 Qa5 10. 0-0 Nc6 11. Qe2 Qxc5 12. Rb1 a6 13. Re1 0-0 14. c4 dxc4 15. Bxc4 Na5 16. Bd3 b5 17. Be3 Qc7 18. a4 bxa4 19. Bb6 Qc3 20. Be4 Nc6 21. Qd1 Bf5 22. Re3 Qxe3 23. fxe3 Bxe4 24. Ng5 Bf5 25. g4 Be6 26. Nxe6 fxe6 27. Qd7 Nxe5 28. Qxa4 Nf3+ 29. Kh1 Nd2 30. Rd1 Rf2 31. Qd7 Nf3 32. Qxe6+ Kh8 33. Bc7 Rf8 34. c4 h5 35. Bg3 Re2 36. Qxg6 h4 37. Bc7 e5 38. Bxe5 Nxe5 39. Qh5+ Kg8 40. Kg1 Nf3+ 41. Kf1 Nd4+ 42. Kg1 Rxe3 43. Qd5+ Ne6 44. c5 Rd8 45. Qxd8+ Nxd8 46. Rxd8+ Kf7 47. c6 Rc3 48. Rd7+ Kg6 49. Rd6+ Kg5 50. c7 Kf4 51. Rxa6 Kg3 52. Ra1 Rxc7 53. Ra3+ Bc3 54. g5 Kxh3 55. g6 Kg4 56. Ra4+ Kg5 57. Kg2 Bf6 58. Ra6 Kxg6 59. Kh3 Kh5 60. Ra5+ Bg5 61. Ra3 Rc5 62. Rf3 Bd8 63. Rd3 Bc7 64. Rb3 Rg5 65. Rb7 Rg3+ 66. Kh2 Rc3+ 67. Kh1 Kg4 68. Rb1 Bg3 69. Ra1 Rc2 70. Rb1 Kh3 71. Rf1 Rh2+ 72. Kg1 Rg2+ 0-1

[Event "Zonal Fortaleza"]
[Site "Fortaleza"]
[Date "1975.??.??"]
[Round "13"]
[White "Donoso Velasco, Pedro H"]
[Black "Stekel Grunberg, Moises"]
[Result "1-0"]
[ECO "B06"]
[PlyCount "99"]
[EventDate "1975.10.18"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "BRA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. Nf3 d6 5. Be2 b5 6. 0-0 b4 7. Na4 Nf6 8. e5 Nd5 9. a3 a5 10. exd6 exd6 11. Bg5 Qc7 12. c4 bxc3 13. bxc3 0-0 14. Bd3 h6 15. Bd2 Nd7 16. Rb1 Ba6 17. c4 Rab8 18. Qc2 N5f6 19. Bf4 Nh5 20. Be3 Rxb1 21. Rxb1 Rb8 22. Rxb8+ Nxb8 23. h3 d5 24. Nc5 Bxc4 25. Bxc4 dxc4 26. Qxc4 Nd7 27. Nxd7 Qxd7 28. g4 Nf6 29. Ne5 Qd5 30. Qxc6 Qxc6 31. Nxc6 a4 32. Ne5 Nd5 33. Bc1 Nc3 34. Kf1 Nb5 35. Bb2 Bf8 36. Nc4 Bg7 37. d5 Bxb2 38. Nxb2 Nxa3 39. Nxa4 Kf8 40. Ke2 Ke7 41. Kd3 Nb5 42. Nc3 Nd6 43. Ne4 Ne8 44. Kd4 f6 45. f4 Kd7 46. Ng3 Kd6 47. f5 g5 48. Ne4+ Kd7 49. Kc5 Kc7 50. d6+ 1-0

[Event "Zonal Fortaleza"]
[Site "Fortaleza"]
[Date "1975.??.??"]
[Round "8"]
[White "Donoso Velasco, Pedro H"]
[Black "Szmetan, Jorge"]
[Result "1-0"]
[ECO "B92"]
[PlyCount "81"]
[EventDate "1975.10.18"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "BRA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 Nbd7 7. 0-0 Nc5 8. Bf3 e6 9. Re1 Qc7 10. Bg5 Be7 11. Qe2 h6 12. Be3 Ncd7 13. Rad1 Ne5 14. a4 0-0 15. Bc1 Bd7 16. Bh5 Rfd8 17. f4 Nc6 18. Nb3 Nxh5 19. Qxh5 Bf6 20. Re3 Be8 21. Rg3 Kh7 22. f5 Ne5 23. Rf1 Qe7 24. Rh3 Kg8 25. Bxh6 gxh6 26. Qxh6 Bg7 27. Rg3 Ng6 28. Qh3 d5 29. fxg6 fxg6 30. exd5 exd5 31. Re3 Qd7 32. Qh4 Qc7 33. Rh3 Be5 34. Rhf3 Bc6 35. Nd4 Re8 36. Nce2 Re7 37. Qh6 Bg7 38. Qxg6 Rae8 39. Nf5 Re6 40. Nh6+ Kh8 41. Rf8+ 1-0

[Event "Zonal Fortaleza"]
[Site "Fortaleza"]
[Date "1975.??.??"]
[Round "11"]
[White "Donoso Velasco, Pedro H"]
[Black "Van Riemsdijk, Herman Claudius"]
[Result "1-0"]
[ECO "C91"]
[PlyCount "79"]
[EventDate "1975.10.18"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "BRA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. d4 d6 9. c3 Bg4 10. Be3 exd4 11. cxd4 d5 12. e5 Ne4 13. Nc3 Nxc3 14. bxc3 Na5 15. Bc2 Nc4 16. h3 Nxe3 17. Rxe3 Be6 18. Qe2 Qd7 19. Rf1 Rae8 20. Ne1 c5 21. f4 cxd4 22. cxd4 Bf5 23. Bxf5 Qxf5 24. g4 Qc8 25. Nf3 Qc4 26. Qf2 Bb4 27. f5 Bc3 28. Rd1 b4 29. f6 Re6 30. Qh4 h6 31. g5 Kh8 32. g6 fxg6 33. Ng5 Ree8 34. f7 Re7 35. e6 Bd2 36. Rxd2 Qc1+ 37. Qe1 Qxe1+ 38. Rxe1 hxg5 39. Rc2 g4 40. hxg4 1-0

[Event "Zonal Fortaleza"]
[Site "Fortaleza"]
[Date "1975.??.??"]
[Round "1"]
[White "Garcia Toledo, Pedro"]
[Black "Donoso Velasco, Pedro H"]
[Result "0-1"]
[ECO "B86"]
[PlyCount "54"]
[EventDate "1975.10.18"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "BRA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 Be7 7. Bb3 0-0 8. Be3 Nbd7 9. f4 Nc5 10. Qf3 e5 11. Nf5 Bxf5 12. exf5 e4 13. Qe2 d5 14. 0-0-0 Nxb3+ 15. axb3 Qa5 16. g4 Rac8 17. g5 Bb4 18. Bd4 Nd7 19. g6 hxg6 20. fxg6 Qa1+ 21. Nb1 Nc5 22. Bxc5 Rxc5 23. gxf7+ Rxf7 24. Qh5 Rxc2+ 25. Kxc2 Rc7+ 26. Nc3 Rxc3+ 27. bxc3 Qa2+ 0-1

[Event "Zonal Fortaleza"]
[Site "Fortaleza"]
[Date "1975.??.??"]
[Round "10"]
[White "Gouveia, Carlos Eduardo"]
[Black "Donoso Velasco, Pedro H"]
[Result "1-0"]
[ECO "A28"]
[PlyCount "73"]
[EventDate "1975.10.18"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "BRA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. a3 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. e4 Nxc3 7. bxc3 Bd6 8. Be2 0-0 9. 0-0 Qe7 10. d3 Bd7 11. Bg5 f6 12. Be3 Kh8 13. a4 Na5 14. Nd2 c5 15. c4 Nc6 16. Nb1 f5 17. exf5 Bxf5 18. Nc3 Nd4 19. Bg4 Bg6 20. Nd5 Qf7 21. Bxd4 exd4 22. Ra2 Rae8 23. f4 Bf5 24. Bxf5 Qxf5 25. Re2 h5 26. g3 h4 27. Rfe1 Rxe2 28. Qxe2 hxg3 29. hxg3 Rd8 30. Kg2 Kg8 31. g4 Qd7 32. f5 Rf8 33. Qe4 Rf7 34. f6 Qxa4 35. g5 gxf6 36. Nxf6+ Kf8 37. Qe8+ 1-0

