[Event "PAR-ch Mayor"]
[Site "Asuncion"]
[Date "2012.05.06"]
[Round "2.6"]
[White "Ferreira, Oscar"]
[Black "Rivas, Jose"]
[Result "1-0"]
[ECO "E68"]
[WhiteElo "2251"]
[BlackElo "1766"]
[PlyCount "61"]
[EventDate "2012.05.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PAR"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 0-0 5. Bg2 d6 6. 0-0 c6 7. Nc3 Nbd7 8. e4 e5 9. Re1 Ng4 10. Rb1 Nb6 11. h3 exd4 12. Nxd4 Ne5 13. b3 a6 14. Be3 c5 15. Nde2 g5 16. Qd2 g4 17. h4 Nf3+ 18. Bxf3 gxf3 19. Nf4 Be5 20. Nd3 Qf6 21. Nxe5 dxe5 22. Bxc5 h6 23. Bxf8 Kxf8 24. Rbd1 Be6 25. Qd6+ Kg7 26. Nd5 Nxd5 27. exd5 Qg6 28. Qxe5+ Kh7 29. dxe6 f5 30. Rd7+ Kg8 31. e7 1-0

[Event "PAR-ch Mayor"]
[Site "Asuncion"]
[Date "2012.05.05"]
[Round "1.4"]
[White "Recalde, Ariel"]
[Black "Ferreira, Oscar"]
[Result "1/2-1/2"]
[ECO "B80"]
[WhiteElo "1970"]
[BlackElo "2251"]
[PlyCount "81"]
[EventDate "2012.05.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PAR"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. g3 Nc6 7. Bg2 Nf6 8. 0-0 Be7 9. Be3 d6 10. a4 Na5 11. Qd3 0-0 12. Rad1 Rb8 13. Qe2 b6 14. g4 Bb7 15. g5 Nd7 16. f4 Rfe8 17. Qh5 g6 18. Qh4 Bf8 19. Rf3 Bg7 20. Rh3 Nf8 21. Qf2 Nc4 22. Bc1 e5 23. Nde2 exf4 24. Nxf4 Ne5 25. Nfd5 Bxd5 26. Nxd5 Qd8 27. Rf1 Rb7 28. Qh4 h5 29. gxh6 Qxh4 30. Rxh4 Bh8 31. Rhf4 Nh7 32. h4 b5 33. a5 Nc4 34. b3 Ne5 35. Ba3 Rd8 36. Bh3 Nc6 37. h5 g5 38. Rf5 Nd4 39. R5f2 Be5 40. Bf5 Nxf5 41. Rxf5 1/2-1/2

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2011.10.09"]
[Round "9"]
[White "Ferreira, Oscar"]
[Black "Villalba, Marcelo"]
[Result "1/2-1/2"]
[ECO "D90"]
[WhiteElo "2286"]
[BlackElo "2195"]
[PlyCount "20"]
[EventDate "2011.09.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PAR"]
[SourceTitle "CBM 144 Extra"]
[Source "ChessBase"]
[SourceDate "2011.10.28"]
[SourceVersion "1"]
[SourceVersionDate "2011.10.28"]
[SourceQuality "1"]

1. Nf3 c6 2. d4 d5 3. c4 Nf6 4. cxd5 cxd5 5. Nc3 g6 6. Bf4 Nc6 7. e3 Bg7 8. h3 0-0 9. Rc1 e6 10. Bd3 Re8 1/2-1/2

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2011.10.08"]
[Round "8"]
[White "Vargas Reyes, Ana Gabriela"]
[Black "Ferreira, Oscar"]
[Result "1/2-1/2"]
[ECO "E92"]
[WhiteElo "2076"]
[BlackElo "2286"]
[PlyCount "24"]
[EventDate "2011.09.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PAR"]
[SourceTitle "CBM 144 Extra"]
[Source "ChessBase"]
[SourceDate "2011.10.28"]
[SourceVersion "1"]
[SourceVersionDate "2011.10.28"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0-0 5. Nf3 d6 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Nd5 Nxd5 10. cxd5 c6 11. Bc4 b5 12. Bb3 a5 1/2-1/2

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2011.10.02"]
[Round "7"]
[White "Ferreira, Oscar"]
[Black "Gamarra, Ramon"]
[Result "1/2-1/2"]
[ECO "B80"]
[WhiteElo "2286"]
[BlackElo "1961"]
[PlyCount "25"]
[EventDate "2011.09.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PAR"]
[SourceTitle "CBM 144 Extra"]
[Source "ChessBase"]
[SourceDate "2011.10.28"]
[SourceVersion "1"]
[SourceVersionDate "2011.10.28"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e6 7. Bg2 Be7 8. 0-0 Qc7 9. Re1 0-0 10. a4 Bd7 11. a5 Nc6 12. Nb3 Ne5 13. Qe2 1/2-1/2

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2011.10.01"]
[Round "6"]
[White "Jodorcovsky Werjivker, Paulo"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "B38"]
[WhiteElo "2191"]
[BlackElo "2286"]
[PlyCount "67"]
[EventDate "2011.09.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PAR"]
[SourceTitle "CBM 144 Extra"]
[Source "ChessBase"]
[SourceDate "2011.10.28"]
[SourceVersion "1"]
[SourceVersionDate "2011.10.28"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. c4 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Be3 Nf6 7. Nc3 d6 8. Be2 0-0 9. 0-0 Qa5 10. a3 Nxd4 11. Bxd4 Be6 12. b4 Qd8 13. Rc1 Nd7 14. Bxg7 Kxg7 15. Qd4+ Kg8 16. Rfd1 a6 17. Nd5 Rc8 18. Nf4 Qb6 19. Nxe6 fxe6 20. c5 Qa7 21. Bc4 Kf7 22. Qb2 Ne5 23. Bb3 Qb8 24. Qa2 Rcd8 25. Bxe6+ Kg7 26. cxd6 Rxd6 27. Rxd6 Qxd6 28. Qd5 Rd8 29. Rd1 Qxd5 30. Rxd5 Rxd5 31. Bxd5 b6 32. f4 Ng4 33. h3 Ne3 34. Bb3 1-0

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2011.09.30"]
[Round "5"]
[White "Ferreira, Oscar"]
[Black "Valiente, Cristobal"]
[Result "1/2-1/2"]
[ECO "A30"]
[WhiteElo "2286"]
[BlackElo "2263"]
[PlyCount "23"]
[EventDate "2011.09.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PAR"]
[SourceTitle "CBM 144 Extra"]
[Source "ChessBase"]
[SourceDate "2011.10.28"]
[SourceVersion "1"]
[SourceVersionDate "2011.10.28"]
[SourceQuality "1"]

1. c4 c5 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. 0-0 e6 6. Nc3 Be7 7. b3 0-0 8. d4 cxd4 9. Nxd4 Bxg2 10. Kxg2 a6 11. Bb2 Qc7 12. f3 1/2-1/2

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2011.09.29"]
[Round "4"]
[White "Lipiniks, Leonardo"]
[Black "Ferreira, Oscar"]
[Result "0-1"]
[ECO "E63"]
[WhiteElo "1848"]
[BlackElo "2286"]
[PlyCount "68"]
[EventDate "2011.09.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PAR"]
[SourceTitle "CBM 144 Extra"]
[Source "ChessBase"]
[SourceDate "2011.10.28"]
[SourceVersion "1"]
[SourceVersionDate "2011.10.28"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 0-0 5. g3 d6 6. Bg2 Nc6 7. b3 a6 8. 0-0 Rb8 9. a4 a5 10. Ba3 Bd7 11. e4 Bg4 12. h3 Bxf3 13. Bxf3 Nd7 14. Ne2 e5 15. d5 Ne7 16. b4 axb4 17. Bxb4 b6 18. Bc3 Nc5 19. Bg2 f5 20. exf5 Nxf5 21. Ra3 Qd7 22. g4 Nh4 23. Bd2 Nxg2 24. Kxg2 Ra8 25. a5 b5 26. cxb5 Qxb5 27. Ng3 Rfb8 28. Bc3 Nd3 29. Kh2 Nf4 30. Qf3 Rf8 31. Qe4 Nxd5 32. f4 Nxc3 33. Rxc3 exf4 34. Rxf4 Bxc3 0-1

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2011.09.25"]
[Round "3"]
[White "Ferreira, Oscar"]
[Black "Recalde, Ariel"]
[Result "1/2-1/2"]
[ECO "D34"]
[WhiteElo "2286"]
[BlackElo "2000"]
[PlyCount "69"]
[EventDate "2011.09.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PAR"]
[SourceTitle "CBM 144 Extra"]
[Source "ChessBase"]
[SourceDate "2011.10.28"]
[SourceVersion "1"]
[SourceVersionDate "2011.10.28"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 c5 3. c4 e6 4. cxd5 exd5 5. g3 Nf6 6. Bg2 Nc6 7. Nc3 Be6 8. 0-0 Be7 9. b3 0-0 10. Bb2 Rc8 11. dxc5 Bxc5 12. Na4 Be7 13. Rc1 Ne4 14. Nd4 Nxd4 15. Qxd4 Bf6 16. Rxc8 Qxc8 17. Qxa7 Bxb2 18. Nxb2 Qc2 19. Nd3 Qxe2 20. Nf4 Qc2 21. Qxb7 Nd2 22. Re1 Qc3 23. Rd1 Qc2 24. Re1 Qc3 25. Nxd5 Nf3+ 26. Bxf3 Qxe1+ 27. Kg2 Qb1 28. a4 g5 29. Qe7 Qf5 30. g4 Qg6 31. Nf6+ Kg7 32. Nh5+ Kg8 33. Nf6+ Kg7 34. Ne8+ Kg8 35. Nf6+ 1/2-1/2

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2011.09.24"]
[Round "2"]
[White "Butti, Enrique"]
[Black "Ferreira, Oscar"]
[Result "1/2-1/2"]
[ECO "B01"]
[WhiteElo "2033"]
[BlackElo "2286"]
[PlyCount "50"]
[EventDate "2011.09.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PAR"]
[SourceTitle "CBM 144 Extra"]
[Source "ChessBase"]
[SourceDate "2011.10.28"]
[SourceVersion "1"]
[SourceVersionDate "2011.10.28"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. Nf3 Nf6 5. g3 Bg4 6. Bg2 Qe6+ 7. Ne2 c6 8. 0-0 Qc8 9. Nf4 Nbd7 10. h3 Bxf3 11. Qxf3 e6 12. b3 Be7 13. Bb2 0-0 14. Rfe1 Re8 15. h4 Nd5 16. Bh3 Nxf4 17. Qxf4 Bf6 18. Bxf6 Nxf6 19. d4 Qd7 20. c4 Rad8 21. Rad1 Qd6 22. Qe5 Re7 23. Qe2 Qb4 24. Rd2 Red7 25. Red1 a5 1/2-1/2

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2011.09.23"]
[Round "1"]
[White "Ferreira, Oscar"]
[Black "Roman, Rodrigo"]
[Result "1/2-1/2"]
[ECO "A32"]
[WhiteElo "2286"]
[BlackElo "2023"]
[PlyCount "35"]
[EventDate "2011.09.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "PAR"]
[SourceTitle "CBM 144 Extra"]
[Source "ChessBase"]
[SourceDate "2011.10.28"]
[SourceVersion "1"]
[SourceVersionDate "2011.10.28"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 e6 3. c4 c5 4. g3 cxd4 5. Nxd4 Bb4+ 6. Bd2 Qb6 7. e3 Nc6 8. Bxb4 Qxb4+ 9. Qd2 Nxd4 10. exd4 Qa4 11. Nc3 Qc6 12. d5 exd5 13. cxd5 Qc5 14. Be2 0-0 15. 0-0 d6 16. Rac1 Bd7 17. Bf3 Rfe8 18. Rfe1 1/2-1/2

[Event "Asuncion Roggio Cup-B 3rd"]
[Site "Asuncion"]
[Date "2010.05.29"]
[Round "9"]
[White "Soppe, Guillermo"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "A64"]
[WhiteElo "2429"]
[BlackElo "2282"]
[PlyCount "75"]
[EventDate "2010.05.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "PAR"]
[EventCategory "2"]
[SourceTitle "CBM 136 Extra"]
[Source "ChessBase"]
[SourceDate "2010.07.02"]
[SourceVersion "2"]
[SourceVersionDate "2010.07.15"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 0-0 9. 0-0 a6 10. a4 Re8 11. Nd2 Nbd7 12. Ra2 Rb8 13. a5 b5 14. axb6 Nxb6 15. b3 Ra8 16. Bb2 Bd7 17. Qa1 Bb5 18. Re1 Rb8 19. Nde4 Nxe4 20. Nxe4 Bxb2 21. Qxb2 Nxd5 22. Rd1 Rxe4 23. Bxe4 Nb4 24. Raa1 Qe7 25. Bf3 Bd7 26. Rd2 Be6 27. Rad1 Rb6 28. h4 h5 29. Qc3 Kh7 30. Qe3 Qf6 31. Rxd6 Rxd6 32. Rxd6 Nc2 33. Qxc5 Qa1+ 34. Kh2 Ne1 35. Be4 Qb2 36. Rxe6 fxe6 37. Qe7+ Qg7 38. Qxg7+ 1-0

[Event "Asuncion Roggio Cup-B 3rd"]
[Site "Asuncion"]
[Date "2010.05.28"]
[Round "8"]
[White "Ferreira, Oscar"]
[Black "Roselli Mailhe, Bernardo"]
[Result "0-1"]
[ECO "E63"]
[WhiteElo "2282"]
[BlackElo "2391"]
[PlyCount "48"]
[EventDate "2010.05.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "PAR"]
[EventCategory "2"]
[SourceTitle "CBM 136 Extra"]
[Source "ChessBase"]
[SourceDate "2010.07.02"]
[SourceVersion "2"]
[SourceVersionDate "2010.07.15"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 0-0 5. Bg2 d6 6. 0-0 Nc6 7. Nc3 a6 8. h3 Rb8 9. Be3 Bd7 10. Rc1 e6 11. d5 Ne7 12. dxe6 fxe6 13. Nd4 b5 14. cxb5 axb5 15. b4 Qe8 16. Nb3 Bc6 17. Nd4 Bxg2 18. Kxg2 Ned5 19. Nxd5 Nxd5 20. Qd2 Ra8 21. Rfd1 Ra3 22. Nb3 Qa8 23. Kg1 Rxa2 24. Qd3 Ra3 0-1

[Event "Asuncion Roggio Cup-B 3rd"]
[Site "Asuncion"]
[Date "2010.05.27"]
[Round "7"]
[White "Larrea, Manuel"]
[Black "Ferreira, Oscar"]
[Result "0-1"]
[ECO "E76"]
[WhiteElo "2347"]
[BlackElo "2282"]
[PlyCount "96"]
[EventDate "2010.05.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "PAR"]
[EventCategory "2"]
[SourceTitle "CBM 136 Extra"]
[Source "ChessBase"]
[SourceDate "2010.07.02"]
[SourceVersion "2"]
[SourceVersionDate "2010.07.15"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. f4 0-0 6. Nf3 c5 7. dxc5 Qa5 8. Bd3 Qxc5 9. Qe2 Bg4 10. Be3 Qa5 11. 0-0 Nc6 12. Rac1 Nd7 13. a3 Rfc8 14. Qf2 Bxf3 15. gxf3 Nc5 16. Bb1 Nb3 17. Rcd1 Bxc3 18. Rd5 Nc5 19. bxc3 Qxc3 20. h4 Nd7 21. h5 Nf6 22. hxg6 Nxd5 23. gxh7+ Kh8 24. exd5 Qg7+ 25. Kh1 Qh6+ 26. Kg1 Rg8+ 27. hxg8Q+ Rxg8+ 28. Qg2 Rxg2+ 29. Kxg2 Qg7+ 30. Kf2 Qb2+ 31. Kg3 Nd4 32. Rh1+ Kg8 33. Bh7+ Kf8 34. Rb1 Qc3 35. Kf2 Qxc4 36. Rb2 b5 37. Rd2 Nb3 38. Rc2 Qxd5 39. Be4 Qh5 40. Bxa7 Nc5 41. Ke3 Qh1 42. f5 Qg1+ 43. Ke2 Qh2+ 44. Ke3 Qe5 45. Bb6 e6 46. f6 Qxf6 47. Bxc5 Qg5+ 48. f4 Qg1+ 0-1

[Event "Asuncion Roggio Cup-B 3rd"]
[Site "Asuncion"]
[Date "2010.05.26"]
[Round "6"]
[White "Ferreira, Oscar"]
[Black "Brito, Luismar Jorge"]
[Result "1-0"]
[ECO "A43"]
[WhiteElo "2282"]
[BlackElo "2343"]
[PlyCount "131"]
[EventDate "2010.05.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "PAR"]
[EventCategory "2"]
[SourceTitle "CBM 136 Extra"]
[Source "ChessBase"]
[SourceDate "2010.07.02"]
[SourceVersion "2"]
[SourceVersionDate "2010.07.15"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. d5 g6 4. Nc3 d6 5. e4 Bg7 6. Bb5+ Bd7 7. a4 0-0 8. Bxd7 Nbxd7 9. 0-0 a6 10. Re1 Qc7 11. h3 Rab8 12. a5 b5 13. axb6 Rxb6 14. Nd2 Ra8 15. Qe2 Ne8 16. Nc4 Rb4 17. Na5 Nb8 18. Ra2 Qd7 19. Bd2 Nc7 20. b3 Nb5 21. Na4 Nd4 22. Qd3 Rb5 23. c4 Rb7 24. Nxb7 Qxb7 25. Rb1 Nd7 26. Bc3 Rb8 27. Rab2 g5 28. Qd1 Qc8 29. b4 h6 30. bxc5 Rxb2 31. Rxb2 dxc5 32. Nb6 Nxb6 33. Rxb6 Qc7 34. Rxa6 Qf4 35. Ra8+ Kh7 36. Bxd4 Bxd4 37. Qf3 Qc1+ 38. Kh2 Kg7 39. Ra7 Bf6 40. g3 Qxc4 41. Qf5 Qd4 42. e5 Bxe5 43. Rxe7 Bf6 44. Re4 Qd3 45. Rf4 Qc3 46. Rf3 Qe5 47. Qxe5 Bxe5 48. Kg2 c4 49. Kf1 f6 50. Ra3 h5 51. g4 hxg4 52. hxg4 Kf7 53. Ra7+ Ke8 54. Ke2 Kd8 55. Ke3 c3 56. Kd3 Ke8 57. Ra3 Kd7 58. Rxc3 Kd6 59. Ra3 Kxd5 60. Ra5+ Kd6 61. Ke4 Bc3 62. Ra6+ Ke7 63. Kf5 Bd4 64. f3 Kf7 65. Rd6 Be5 66. Rd7+ 1-0

[Event "Asuncion Roggio Cup-B 3rd"]
[Site "Asuncion"]
[Date "2010.05.25"]
[Round "5"]
[White "Zacarias Martinez, Ruben David"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "B08"]
[WhiteElo "2213"]
[BlackElo "2282"]
[PlyCount "159"]
[EventDate "2010.05.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "PAR"]
[EventCategory "2"]
[SourceTitle "CBM 136 Extra"]
[Source "ChessBase"]
[SourceDate "2010.07.02"]
[SourceVersion "2"]
[SourceVersionDate "2010.07.15"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 0-0 6. 0-0 Bg4 7. Be3 Nc6 8. d5 Bxf3 9. Bxf3 Ne5 10. Be2 c6 11. f4 Ned7 12. Bf3 cxd5 13. Nxd5 Nxd5 14. Qxd5 Qc7 15. c3 Rac8 16. Qd3 Nb6 17. Rad1 Nc4 18. Rf2 Nxe3 19. Qxe3 b5 20. Rc2 b4 21. c4 Rfd8 22. Kh1 a5 23. g4 a4 24. Rd3 Qc5 25. Qe2 Rb8 26. Rc1 e6 27. h4 h6 28. g5 Kf8 29. Kg2 Ke7 30. Rdd1 Rh8 31. Rh1 b3 32. a3 hxg5 33. hxg5 Rxh1 34. Kxh1 Rh8+ 35. Kg2 Qd4 36. Rc3 Rh4 37. Kg3 Qg1+ 38. Kxh4 Bxc3 39. bxc3 Qc1 40. c5 dxc5 41. Qb5 Qxf4+ 42. Bg4 Qh2+ 43. Bh3 Qf2+ 44. Kg4 Kf8 45. Bf1 Kg7 46. Bd3 e5 47. Kh3 Qf3+ 48. Kh2 Qh5+ 49. Kg2 Qxg5+ 50. Kf3 Qf4+ 51. Ke2 Qh2+ 52. Kd1 Qg1+ 53. Kd2 Qf2+ 54. Be2 Qf4+ 55. Kd3 Qf2 56. Qxa4 Qg3+ 57. Kd2 Qf4+ 58. Kd3 Qg3+ 59. Kc4 Qe1 60. Bd3 b2 61. Qb5 Qa1 62. a4 g5 63. Kxc5 g4 64. Kd6 Qa3+ 65. Kxe5 g3 66. Kf4 g2 67. Qg5+ Kf8 68. Qxg2 Qxc3 69. Qc2 Qf6+ 70. Ke3 Qb6+ 71. Kd2 Qb4+ 72. Ke2 Kg7 73. Qb1 f6 74. Qa2 Qa5 75. Bc2 Qa6+ 76. Kd2 Qa5+ 77. Kd3 Qa6+ 78. Kc3 Qa5+ 79. Kxb2 Qe5+ 80. Kb1 1-0

[Event "Asuncion Roggio Cup-B 3rd"]
[Site "Asuncion"]
[Date "2010.05.24"]
[Round "4"]
[White "Ferreira, Oscar"]
[Black "Patriarca, Luis"]
[Result "1/2-1/2"]
[ECO "A46"]
[WhiteElo "2282"]
[BlackElo "2304"]
[PlyCount "27"]
[EventDate "2010.05.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "PAR"]
[EventCategory "2"]
[SourceTitle "CBM 136 Extra"]
[Source "ChessBase"]
[SourceDate "2010.07.02"]
[SourceVersion "2"]
[SourceVersionDate "2010.07.15"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. Bg5 c5 4. e3 b6 5. d5 d6 6. Nc3 a6 7. a4 Be7 8. Be2 h6 9. Bxf6 Bxf6 10. Ne4 Be7 11. Nc3 Bf6 12. Ne4 Be7 13. Nc3 Bf6 14. Ne4 1/2-1/2

[Event "Asuncion Roggio Cup-B 3rd"]
[Site "Asuncion"]
[Date "2010.05.22"]
[Round "3"]
[White "Ferreira, Oscar"]
[Black "Peralta, Eduardo"]
[Result "1-0"]
[ECO "E90"]
[WhiteElo "2282"]
[BlackElo "2280"]
[PlyCount "71"]
[EventDate "2010.05.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "PAR"]
[EventCategory "2"]
[SourceTitle "CBM 136 Extra"]
[Source "ChessBase"]
[SourceDate "2010.07.02"]
[SourceVersion "2"]
[SourceVersionDate "2010.07.15"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 c5 4. Nc3 Bg7 5. d5 0-0 6. e4 d6 7. h3 e6 8. Bd3 a6 9. a4 Nbd7 10. dxe6 fxe6 11. 0-0 Nh5 12. Be2 Nb8 13. e5 dxe5 14. Qxd8 Rxd8 15. Be3 Nf4 16. Rfd1 Rxd1+ 17. Rxd1 Nc6 18. Bxc5 e4 19. Nd4 Bxd4 20. Bxd4 e5 21. Be3 Nxe2+ 22. Nxe2 Be6 23. Nc3 Bxc4 24. Rd7 Rd8 25. Rxb7 Bd3 26. Bh6 Nd4 27. Rg7+ Kh8 28. Rb7 Nf5 29. Nd5 Bc4 30. Nf6 Bg8 31. Bg5 h6 32. Be3 g5 33. b4 Rd6 34. Nxe4 Rd1+ 35. Kh2 Nd6 36. Rd7 1-0

[Event "Asuncion Roggio Cup-B 3rd"]
[Site "Asuncion"]
[Date "2010.05.21"]
[Round "2"]
[White "Almiron, Antonio"]
[Black "Ferreira, Oscar"]
[Result "1/2-1/2"]
[ECO "A55"]
[WhiteElo "2171"]
[BlackElo "2282"]
[PlyCount "35"]
[EventDate "2010.05.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "PAR"]
[EventCategory "2"]
[SourceTitle "CBM 136 Extra"]
[Source "ChessBase"]
[SourceDate "2010.07.02"]
[SourceVersion "2"]
[SourceVersionDate "2010.07.15"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d6 3. c4 Nbd7 4. Nc3 e5 5. e4 Be7 6. Be2 0-0 7. 0-0 Re8 8. Re1 Bf8 9. Bf1 c6 10. Bg5 h6 11. Bh4 a6 12. a3 b5 13. Rc1 Bb7 14. d5 cxd5 15. cxd5 Rc8 16. b4 Nb6 17. Nd2 Be7 18. Bg3 1/2-1/2

[Event "Asuncion Roggio Cup-B 3rd"]
[Site "Asuncion"]
[Date "2010.05.20"]
[Round "1"]
[White "Ferreira, Oscar"]
[Black "Valiente, Cristobal"]
[Result "1/2-1/2"]
[ECO "E19"]
[WhiteElo "2282"]
[BlackElo "2247"]
[PlyCount "32"]
[EventDate "2010.05.20"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "PAR"]
[EventCategory "2"]
[SourceTitle "CBM 136 Extra"]
[Source "ChessBase"]
[SourceDate "2010.07.02"]
[SourceVersion "2"]
[SourceVersionDate "2010.07.15"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. d4 b6 4. g3 Bb7 5. Bg2 Be7 6. 0-0 0-0 7. Nc3 Ne4 8. Qc2 Nxc3 9. Qxc3 d6 10. b3 Nd7 11. Bb2 Nf6 12. Nd2 Bxg2 13. Kxg2 c5 14. e4 cxd4 15. Qxd4 Qc7 16. Rac1 Rfd8 1/2-1/2

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2008.06.26"]
[Round "11"]
[White "Gutierrez, Santiago"]
[Black "Ferreira, Oscar"]
[Result "1/2-1/2"]
[ECO "B33"]
[BlackElo "2290"]
[PlyCount "72"]
[EventDate "2008.05.31"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Qb6 5. Nb3 Nf6 6. Nc3 e6 7. Be2 Bb4 8. 0-0 Bxc3 9. bxc3 Nxe4 10. Qd3 d5 11. Be3 Qc7 12. Nc5 Nxc5 13. Bxc5 Bd7 14. f4 0-0-0 15. Qe3 Kb8 16. Rab1 Bc8 17. Rb2 Ka8 18. Bb5 Bd7 19. Rfb1 Rb8 20. Rb3 b6 21. Bxc6+ Qxc6 22. Bd4 f6 23. Ra3 Kb7 24. Qd3 Qc4 25. Qe3 Qc7 26. Rb4 e5 27. fxe5 fxe5 28. Bxe5 Rbe8 29. Bxc7 Rxe3 30. Rxa7+ Kxa7 31. Bxb6+ Ka6 32. Bxe3 Bb5 33. Kf2 g6 34. g3 Rc8 35. Bd2 Re8 36. Be3 Rc8 1/2-1/2

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2008.06.25"]
[Round "10"]
[White "Ferreira, Oscar"]
[Black "Galeano, Mario"]
[Result "1-0"]
[ECO "A53"]
[WhiteElo "2290"]
[BlackElo "2026"]
[PlyCount "77"]
[EventDate "2008.05.31"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 d6 3. d4 Bg4 4. Qb3 Qc8 5. Nbd2 Nbd7 6. h3 Bh5 7. e3 e5 8. g4 Bg6 9. Bg2 c6 10. 0-0 Be7 11. Nh4 0-0 12. f4 exf4 13. exf4 h6 14. Nxg6 fxg6 15. Nf3 Re8 16. Re1 Nf8 17. Bd2 Qc7 18. Re2 d5 19. Ne5 Rad8 20. Rae1 Bd6 21. cxd5 Nxd5 22. Bxd5+ cxd5 23. Qxd5+ Kh7 24. Qc4 Qxc4 25. Nxc4 Rxe2 26. Rxe2 Bb8 27. Re4 Rd5 28. Ne3 Rd8 29. Kg2 Nd7 30. g5 Nc5 31. dxc5 Rxd2+ 32. Kf3 hxg5 33. fxg5 Rxb2 34. Re7 Rd2 35. Rxb7 Rd8 36. c6 Rc8 37. Nd5 Bd6 38. Rd7 Bc5 39. c7 1-0

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2008.06.24"]
[Round "9"]
[White "Ferreira, Oscar"]
[Black "Patriarca, Luis"]
[Result "1/2-1/2"]
[ECO "D94"]
[WhiteElo "2290"]
[BlackElo "2333"]
[PlyCount "18"]
[EventDate "2008.05.31"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Qc2 g6 5. e3 Bf5 6. Bd3 Bxd3 7. Qxd3 Bg7 8. 0-0 0-0 9. Nc3 Nbd7 1/2-1/2

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2008.06.22"]
[Round "8"]
[White "Piris Tillner, Eduardo"]
[Black "Ferreira, Oscar"]
[Result "0-1"]
[ECO "A46"]
[WhiteElo "1909"]
[BlackElo "2290"]
[PlyCount "100"]
[EventDate "2008.05.31"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d6 3. Bg5 Nbd7 4. Nbd2 h6 5. Bh4 c6 6. e4 Qc7 7. Bc4 e6 8. c3 Be7 9. 0-0 0-0 10. Qe2 e5 11. a4 b6 12. Rfb1 Bb7 13. Bd3 Rfe8 14. b4 Bf8 15. b5 Rac8 16. Rc1 Nh5 17. Bg3 g6 18. bxc6 Bxc6 19. d5 Nxg3 20. hxg3 Bb7 21. Bb5 Red8 22. Bxd7 Rxd7 23. Nb3 a5 24. g4 Ra8 25. c4 Be7 26. Rc3 Ba6 27. Nfd2 Bg5 28. Nb1 Qd8 29. Na3 Rc7 30. Rc2 Qc8 31. Raa2 Raa7 32. Nb5 Bxb5 33. cxb5 Rxc2 34. Rxc2 Rc7 35. Na1 Rc3 36. f3 Kg7 37. Kf2 Qc5+ 38. Kf1 Qa3 39. Rxc3 Qxc3 40. Qd1 Be3 41. Ke2 Bc5 42. Nc2 Qb3 43. Qd3 Qxa4 44. g3 Qa2 45. f4 f6 46. g5 hxg5 47. fxg5 fxg5 48. Kf3 Qb1 49. Qe2 Qh1+ 50. Qg2 g4+ 0-1

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2008.06.21"]
[Round "7"]
[White "Butti, Enrique"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "A55"]
[WhiteElo "2093"]
[BlackElo "2290"]
[PlyCount "81"]
[EventDate "2008.05.31"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. Nf3 e5 5. g3 Be7 6. Bg2 0-0 7. 0-0 c6 8. e4 Re8 9. h3 Bf8 10. Be3 a6 11. Qc2 Qc7 12. Rfd1 b5 13. Nd2 Bb7 14. Rac1 Rac8 15. cxb5 cxb5 16. Qb1 Qb8 17. b4 Be7 18. d5 Rc7 19. a4 bxa4 20. Nxa4 Rec8 21. Bf1 Rxc1 22. Rxc1 Rxc1 23. Qxc1 Bd8 24. Qc4 Kf8 25. Nb3 Qc8 26. Qd3 h6 27. Na5 Bxa5 28. bxa5 Qc7 29. Qc3 Qxc3 30. Nxc3 Ke7 31. f3 Nc5 32. Bxc5 dxc5 33. Na4 Nd7 34. Kf2 f5 35. h4 fxe4 36. fxe4 Kd6 37. Bh3 Nf6 38. Ke3 c4 39. Bf5 Ne8 40. Kd2 Kc7 41. Nc5 1-0

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2008.06.15"]
[Round "6"]
[White "Ferreira, Oscar"]
[Black "Kropff, Ricardo"]
[Result "1/2-1/2"]
[ECO "D30"]
[WhiteElo "2290"]
[BlackElo "2282"]
[PlyCount "20"]
[EventDate "2008.05.31"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "CBM 124 Extra"]
[Source "ChessBase"]
[SourceDate "2008.07.03"]
[SourceVersion "1"]
[SourceVersionDate "2008.07.03"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 d5 3. c4 e6 4. e3 Be7 5. Bd3 0-0 6. 0-0 dxc4 7. Bxc4 a6 8. Qe2 b5 9. Bd3 Nbd7 10. Rd1 Bb7 1/2-1/2

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2008.06.14"]
[Round "5"]
[White "Ferreira, Oscar"]
[Black "Forte, Fernando"]
[Result "1-0"]
[ECO "D26"]
[WhiteElo "2290"]
[BlackElo "1966"]
[PlyCount "77"]
[EventDate "2008.05.31"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "CBM 124 Extra"]
[Source "ChessBase"]
[SourceDate "2008.07.03"]
[SourceVersion "1"]
[SourceVersionDate "2008.07.03"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 c5 6. 0-0 cxd4 7. exd4 Be7 8. Qe2 0-0 9. Rd1 Nc6 10. Nc3 Nb4 11. Ne5 a6 12. a3 Nbd5 13. Bg5 h6 14. Bh4 Nxc3 15. bxc3 Qc7 16. a4 b6 17. Rac1 Bd7 18. Bb3 Rfd8 19. c4 Rac8 20. h3 Be8 21. Bg3 Qb7 22. Bc2 b5 23. axb5 axb5 24. c5 Nd5 25. Be4 b4 26. Bxd5 Qxd5 27. Qc4 f6 28. Qxd5 Rxd5 29. Nc4 e5 30. Nb6 Rdd8 31. Nxc8 Rxc8 32. dxe5 Bxc5 33. exf6 gxf6 34. Bd6 Ba4 35. Rd4 Bxd4 36. Rxc8+ Kf7 37. Bxb4 Ke6 38. Bd2 Bd7 39. Rh8 1-0

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2008.06.08"]
[Round "4"]
[White "Peralta, Eduardo"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "B16"]
[WhiteElo "2245"]
[BlackElo "2290"]
[PlyCount "109"]
[EventDate "2008.05.31"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "CBM 124 Extra"]
[Source "ChessBase"]
[SourceDate "2008.07.03"]
[SourceVersion "1"]
[SourceVersionDate "2008.07.03"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. Nf3 Bf5 7. g3 e6 8. Bg2 Nd7 9. 0-0 Bg4 10. c3 f5 11. Re1 Bg7 12. Qb3 Bxf3 13. Bxf3 Qb6 14. Qc2 0-0 15. a4 a6 16. a5 Qd8 17. b4 Nf6 18. Bg5 Qd7 19. Rad1 Nd5 20. c4 Nc7 21. Qd2 Rfe8 22. Kh1 Kh8 23. Rg1 Rg8 24. g4 fxg4 25. Rxg4 f5 26. Rh4 Raf8 27. Bf4 Rd8 28. Qe3 Bf6 29. Rh3 Rde8 30. Rh6 Bg7 31. Rh3 Bf6 32. Bh5 Re7 33. Be5 Bxe5 34. Qxe5+ Rgg7 35. Rg1 Kg8 36. Rhg3 Rxg3 37. hxg3 Ne8 38. Bf3 Qd6 39. Rb1 Qxe5 40. dxe5 Nc7 41. Rd1 Kf8 42. Bh5 Kg7 43. Rd8 Kh6 44. Be2 Kg6 45. f4 Ne8 46. Kg2 Ng7 47. Bf3 Kf7 48. Kf2 Re8 49. Rd6 Ke7 50. b5 axb5 51. cxb5 Ra8 52. a6 bxa6 53. Bxc6 Rb8 54. bxa6 Rb2+ 55. Ke3 1-0

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2008.06.07"]
[Round "3"]
[White "Almiron, Antonio"]
[Black "Ferreira, Oscar"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "2115"]
[BlackElo "2290"]
[PlyCount "101"]
[EventDate "2008.05.31"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "CBM 124 Extra"]
[Source "ChessBase"]
[SourceDate "2008.07.03"]
[SourceVersion "1"]
[SourceVersionDate "2008.07.03"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. c4 Nb6 5. Nf3 Bg4 6. Nbd2 e6 7. Be2 Be7 8. 0-0 0-0 9. b3 Nc6 10. Bb2 Bf5 11. a3 Bf6 12. c5 Nd5 13. Bb5 Nde7 14. Nc4 Bg4 15. Nce5 Bxe5 16. dxe5 Qxd1 17. Raxd1 Bxf3 18. gxf3 Rfd8 19. f4 a6 20. Bd3 Nd5 21. f5 Rd7 22. fxe6 fxe6 23. b4 Rad8 24. Bc4 Kf7 25. Bb3 Nf4 26. Rxd7+ Rxd7 27. Rd1 Rxd1+ 28. Bxd1 Nd3 29. Bc3 Ndxe5 30. a4 Nd7 31. b5 axb5 32. axb5 Na7 33. b6 cxb6 34. cxb6 Nxb6 35. Bd4 Nac8 36. f4 Nd5 37. f5 exf5 38. Bb3 Nce7 39. Bc5 Ke8 40. Kf2 Kd7 41. Kf3 Kc6 42. Bd4 g5 43. Bc2 h5 44. Bb2 b5 45. Bc1 f4 46. Ke4 Kc5 47. Bb2 b4 48. Bb3 Nc3+ 49. Kf3 Nf5 50. Bf7 Nd4+ 51. Kf2 0-1

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2008.06.01"]
[Round "2"]
[White "Ferreira, Oscar"]
[Black "Hernandez, Angel C"]
[Result "1/2-1/2"]
[ECO "A06"]
[WhiteElo "2290"]
[BlackElo "2210"]
[PlyCount "18"]
[EventDate "2008.05.31"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. Nf3 d5 2. b3 c5 3. e3 Nf6 4. Bb2 e6 5. Bb5+ Bd7 6. Qe2 Bd6 7. Ne5 Bxe5 8. Bxe5 Bxb5 9. Qxb5+ Nbd7 1/2-1/2

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "2008.05.31"]
[Round "1"]
[White "Recalde, Ariel"]
[Black "Ferreira, Oscar"]
[Result "0-1"]
[ECO "A29"]
[WhiteElo "2010"]
[BlackElo "2290"]
[PlyCount "94"]
[EventDate "2008.05.31"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "CBM 124 Extra"]
[Source "ChessBase"]
[SourceDate "2008.07.03"]
[SourceVersion "1"]
[SourceVersionDate "2008.07.03"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6 7. 0-0 Be7 8. d3 Be6 9. a3 0-0 10. b4 a5 11. b5 Nd4 12. Nxd4 exd4 13. Ne4 a4 14. Nd2 Bd5 15. Bxd5 Qxd5 16. Rb1 Qa2 17. Bb2 Rfd8 18. Nf3 Bxa3 19. Bxd4 Qe6 20. Ra1 Bf8 21. Qc2 Nd5 22. e4 Nf4 23. Be3 Nxd3 24. Ng5 Qg6 25. Rfd1 h6 26. Rxd3 Rxd3 27. Qxd3 hxg5 28. Qd5 c6 29. bxc6 bxc6 30. Qxg5 Qxe4 31. Qf4 Qd5 32. Qd4 a3 33. Qxd5 cxd5 34. Kf1 f6 35. Ke2 Kf7 36. Kd3 Bd6 37. Ra2 Ke6 38. Bd4 g5 39. Re2+ Kf7 40. Ra2 g4 41. f3 gxf3 42. Ke3 Ra4 43. g4 Ke6 44. h4 Rb4 45. h5 Rb3+ 46. Kd2 Be5 47. Kc2 Bxd4 0-1

[Event "Olavarria Magistral op 5th"]
[Site "Olavarria"]
[Date "2005.02.27"]
[Round "7"]
[White "Rodi, Luis Ernesto"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "2258"]
[BlackElo "2278"]
[PlyCount "31"]
[EventDate "2005.02.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "CBM 105 Extra"]
[Source "ChessBase"]
[SourceDate "2005.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.05.01"]
[SourceQuality "1"]

1. d4 Nf6 2. Bg5 e6 3. e4 h6 4. Bxf6 Qxf6 5. c3 Qd8 6. Bd3 d6 7. f4 c5 8. Nf3 d5 9. exd5 Qxd5 10. 0-0 Be7 11. Bc2 0-0 12. Qd3 g6 13. Ne5 Re8 14. Nxf7 Kxf7 15. Qxg6+ Kf8 16. f5 1-0

[Event "Olavarria Magistral op 5th"]
[Site "Olavarria"]
[Date "2005.02.26"]
[Round "6"]
[White "Ferreira, Oscar"]
[Black "Arambel, Sergio Javier"]
[Result "0-1"]
[ECO "A37"]
[WhiteElo "2278"]
[BlackElo "2296"]
[PlyCount "146"]
[EventDate "2005.02.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "CBM 105 Extra"]
[Source "ChessBase"]
[SourceDate "2005.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.05.01"]
[SourceQuality "1"]

1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. g3 Nc6 5. Bg2 d6 6. 0-0 e5 7. Rb1 Nge7 8. a3 a5 9. Ne1 Be6 10. d3 0-0 11. Nc2 Rb8 12. Ne3 Qd7 13. Re1 Nd4 14. b4 axb4 15. axb4 cxb4 16. Rxb4 b5 17. cxb5 Nxb5 18. Nxb5 Rxb5 19. Qa4 Rxb4 20. Qxb4 d5 21. Ba3 Nc6 22. Qa4 Rb8 23. Rc1 Nd4 24. Qxd7 Bxd7 25. Kf1 Nb5 26. Be7 d4 27. Nd5 Nc3 28. Nxc3 dxc3 29. Ke1 e4 30. Bxe4 Ba4 31. Bc5 Rd8 32. Ba3 f5 33. Bf3 Bb3 34. Rb1 Ba2 35. Rb7 Bf7 36. Kd1 Ra8 37. Rxf7 Rxa3 38. Bd5 Kh8 39. Re7 Ra1+ 40. Kc2 h5 41. Bf7 Bf6 42. Re8+ Kg7 43. Bd5 Rf1 44. f4 h4 45. Rg8+ Kh7 46. Rf8 Bg7 47. Re8 hxg3 48. hxg3 Rg1 49. e3 Re1 50. Re6 Re2+ 51. Kc1 Re1+ 52. Kc2 Re2+ 53. Kc1 Bf8 54. Bb3 Ba3+ 55. Kd1 Rd2+ 56. Ke1 Rb2 57. Ba4 c2 58. Bxc2 Rxc2 59. e4 fxe4 60. dxe4 Rg2 61. Kf1 Rxg3 62. Kf2 Rb3 63. Rc6 Bf8 64. Rf6 Bc5+ 65. Kg2 Bd4 66. Rd6 Be3 67. Rd7+ Kh6 68. Kf3 Bd2+ 69. Kg4 Be1 70. f5 Rg3+ 71. Kf4 g5+ 72. Ke5 Bc3+ 73. Ke6 Re3 0-1

[Event "Olavarria Magistral op 5th"]
[Site "Olavarria"]
[Date "2005.02.26"]
[Round "5"]
[White "Peralta, Eduardo"]
[Black "Ferreira, Oscar"]
[Result "1/2-1/2"]
[ECO "E12"]
[WhiteElo "2252"]
[BlackElo "2278"]
[PlyCount "24"]
[EventDate "2005.02.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "CBM 105 Extra"]
[Source "ChessBase"]
[SourceDate "2005.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.05.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 exd5 7. e3 Bd6 8. Bb5+ c6 9. Bd3 0-0 10. 0-0 Re8 11. b4 Nbd7 12. Bb2 Ne4 1/2-1/2

[Event "Olavarria Magistral op 5th"]
[Site "Olavarria"]
[Date "2005.02.25"]
[Round "2"]
[White "Ferreira, Oscar"]
[Black "Bianchi, Albino Angel"]
[Result "1-0"]
[ECO "E90"]
[WhiteElo "2278"]
[BlackElo "2180"]
[PlyCount "65"]
[EventDate "2005.02.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "CBM 105 Extra"]
[Source "ChessBase"]
[SourceDate "2005.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.05.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 0-0 5. d4 d6 6. h3 c5 7. d5 e6 8. Bd3 exd5 9. exd5 Re8+ 10. Be3 Na6 11. 0-0 Nc7 12. Qd2 Nd7 13. Bg5 Bf6 14. Qf4 Bxg5 15. Nxg5 Ne5 16. Qh4 h5 17. Be2 f6 18. Nge4 f5 19. Ng5 Nf7 20. f4 Nxg5 21. fxg5 Re5 22. g4 hxg4 23. hxg4 f4 24. Rxf4 Qxg5 25. Qxg5 Rxg5 26. Raf1 Bd7 27. Ne4 Re5 28. Bd3 Re7 29. Nxd6 Re3 30. Bxg6 Rg3+ 31. Kh2 Rxg4 32. Rxg4 Bxg4 33. Rg1 1-0

[Event "Olavarria Magistral op 5th"]
[Site "Olavarria"]
[Date "2005.02.25"]
[Round "4"]
[White "Ferreira, Oscar"]
[Black "Sosa Harrison, Jorge"]
[Result "1/2-1/2"]
[ECO "D13"]
[WhiteElo "2278"]
[BlackElo "2312"]
[PlyCount "24"]
[EventDate "2005.02.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "CBM 105 Extra"]
[Source "ChessBase"]
[SourceDate "2005.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.05.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 d5 3. c4 c6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 e6 7. e3 Bd6 8. Bxd6 Qxd6 9. Bd3 a6 10. 0-0 e5 11. dxe5 Nxe5 12. Nxe5 Qxe5 1/2-1/2

[Event "Olavarria Magistral op 5th"]
[Site "Olavarria"]
[Date "2005.02.25"]
[Round "3"]
[White "Giampa, Alejandro"]
[Black "Ferreira, Oscar"]
[Result "1/2-1/2"]
[ECO "B40"]
[WhiteElo "2231"]
[BlackElo "2278"]
[PlyCount "28"]
[EventDate "2005.02.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "CBM 105 Extra"]
[Source "ChessBase"]
[SourceDate "2005.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.05.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. b3 Nf6 4. e5 Nd5 5. Bb2 e6 6. g3 Be7 7. Bg2 0-0 8. 0-0 d6 9. exd6 Qxd6 10. Na3 Bf6 11. Bxf6 Nxf6 12. Nc4 Qc7 13. Qe2 b6 14. Nce5 Bb7 1/2-1/2

[Event "Olavarria Magistral op 5th"]
[Site "Olavarria"]
[Date "2005.02.24"]
[Round "1"]
[White "Sorin, Ariel"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "A55"]
[WhiteElo "2509"]
[BlackElo "2278"]
[PlyCount "73"]
[EventDate "2005.02.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "CBM 105 Extra"]
[Source "ChessBase"]
[SourceDate "2005.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.05.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. e4 e5 5. Nf3 Be7 6. Be2 0-0 7. 0-0 c6 8. Be3 Re8 9. d5 c5 10. Ne1 Rf8 11. Nd3 Ne8 12. Qd2 g6 13. Bh6 Ng7 14. f4 exf4 15. Qxf4 f6 16. Qg3 Ne5 17. Nf4 Re8 18. Rf2 f5 19. Qh3 Bh4 20. g3 Bf6 21. Bxg7 Bxg7 22. Ne6 Bxe6 23. dxe6 Rxe6 24. exf5 gxf5 25. Nd5 Qd7 26. Rxf5 Rf8 27. Rxf8+ Bxf8 28. Rf1 Rg6 29. Qh4 Qg7 30. Kh1 Nd7 31. Qd8 Re6 32. Bd3 Ne5 33. Bxh7+ Kxh7 34. Rxf8 Ng4 35. Rh8+ Qxh8 36. Qd7+ Qg7 37. Qxe6 1-0

[Event "Olympiad-36"]
[Site "Mallorca"]
[Date "2004.10.29"]
[Round "14"]
[White "Hosiah, Olebogeng"]
[Black "Ferreira, Oscar"]
[Result "1/2-1/2"]
[ECO "B43"]
[WhiteElo "2124"]
[BlackElo "2284"]
[PlyCount "60"]
[EventDate "2004.10.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ESP"]
[SourceTitle "CBM 104"]
[Source "ChessBase"]
[SourceDate "2005.01.27"]
[SourceVersion "1"]
[SourceVersionDate "2005.01.27"]
[SourceQuality "1"]
[WhiteTeam "Botswana"]
[BlackTeam "Paraguay"]
[WhiteTeamCountry "BOT"]
[BlackTeamCountry "PAR"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Bd3 Nc6 7. Nxc6 dxc6 8. 0-0 e5 9. Kh1 Nf6 10. f4 Bd6 11. f5 h5 12. Bg5 Be7 13. Qd2 b5 14. a4 b4 15. Ne2 Bb7 16. Bxf6 gxf6 17. Bc4 Qb6 18. Qd3 h4 19. Qb3 Rh7 20. Rad1 Rd8 21. Rd3 a5 22. h3 Rg7 23. g4 Rxd3 24. Qxd3 Qd8 25. Qe3 c5 26. Kh2 Qa8 27. Qh6 Kf8 28. g5 Bxe4 29. g6 Bd6 30. Qh8+ Rg8 1/2-1/2

[Event "Olympiad-36"]
[Site "Mallorca"]
[Date "2004.10.28"]
[Round "13"]
[White "Ferreira, Oscar"]
[Black "Rodgaard, John"]
[Result "1/2-1/2"]
[ECO "D12"]
[WhiteElo "2284"]
[BlackElo "2310"]
[PlyCount "18"]
[EventDate "2004.10.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ESP"]
[SourceTitle "CBM 104"]
[Source "ChessBase"]
[SourceDate "2005.01.27"]
[SourceVersion "1"]
[SourceVersionDate "2005.01.27"]
[SourceQuality "1"]
[WhiteTeam "Paraguay"]
[BlackTeam "Faroe Islands"]
[WhiteTeamCountry "PAR"]
[BlackTeamCountry "FAI"]

1. Nf3 d5 2. d4 c6 3. e3 Bf5 4. Bd3 e6 5. 0-0 Nf6 6. c4 Bxd3 7. Qxd3 Be7 8. Nc3 0-0 9. Rd1 Nbd7 1/2-1/2

[Event "Olympiad-36"]
[Site "Mallorca"]
[Date "2004.10.27"]
[Round "12"]
[White "Bendana Guerrero, Guy"]
[Black "Ferreira, Oscar"]
[Result "1/2-1/2"]
[ECO "A48"]
[WhiteElo "2166"]
[BlackElo "2284"]
[PlyCount "51"]
[EventDate "2004.10.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ESP"]
[SourceTitle "CBM 104"]
[Source "ChessBase"]
[SourceDate "2005.01.27"]
[SourceVersion "1"]
[SourceVersionDate "2005.01.27"]
[SourceQuality "1"]
[WhiteTeam "Nicaragua"]
[BlackTeam "Paraguay"]
[WhiteTeamCountry "NCA"]
[BlackTeamCountry "PAR"]

1. d4 g6 2. Nf3 Bg7 3. Bf4 Nf6 4. Nbd2 d6 5. e4 0-0 6. h3 Nc6 7. c3 Nh5 8. Bh2 e5 9. dxe5 dxe5 10. Bc4 Qe7 11. 0-0 Nf4 12. Re1 Be6 13. Qc2 Rad8 14. Rad1 Rd7 15. Bf1 Rfd8 16. Nc4 f6 17. Ne3 Qf7 18. b3 Qe7 19. Rxd7 Rxd7 20. Rd1 Bf8 21. Rxd7 Qxd7 22. Qd2 Qxd2 23. Nxd2 Bc5 24. Bxf4 exf4 25. Nd5 Bxd5 26. exd5 1/2-1/2

[Event "Olympiad-36"]
[Site "Mallorca"]
[Date "2004.10.25"]
[Round "10"]
[White "Ferreira, Oscar"]
[Black "Pierrot, Juan Facundo"]
[Result "1/2-1/2"]
[ECO "A38"]
[WhiteElo "2284"]
[BlackElo "2436"]
[PlyCount "128"]
[EventDate "2004.10.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ESP"]
[SourceTitle "CBM 104"]
[Source "ChessBase"]
[SourceDate "2005.01.27"]
[SourceVersion "1"]
[SourceVersionDate "2005.01.27"]
[SourceQuality "1"]
[WhiteTeam "Paraguay"]
[BlackTeam "Argentina"]
[WhiteTeamCountry "PAR"]
[BlackTeamCountry "ARG"]

1. Nf3 c5 2. g3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Nc2 d6 7. Bg2 Nf6 8. Nc3 0-0 9. 0-0 Bd7 10. Qd2 a6 11. b3 Qa5 12. Bb2 Rac8 13. Rfd1 b5 14. cxb5 axb5 15. Bxc6 Rxc6 16. Nd5 Qd8 17. Nxf6+ exf6 18. Nb4 Rc8 19. Qxd6 Be6 20. Qxd8 Rfxd8 21. Rxd8+ Rxd8 22. Nd3 Bf5 23. Rd1 Ra8 24. a3 Re8 25. Kf1 Bh3+ 26. Ke1 Bg4 27. Rd2 Rc8 28. f3 Be6 29. b4 Bc4 30. Nc5 Ra8 31. Rc2 Ra7 32. Kf2 Bf8 33. Ne4 f5 34. Nf6+ Kg7 35. Nd7+ Kg8 36. Nf6+ Kg7 37. Ng4+ Kg8 38. Ne3 Be6 39. Rd2 f6 40. Nd5 Kf7 41. Ne3 Be7 42. Rd3 g5 43. Bd4 Rc7 44. Rc3 Rxc3 45. Bxc3 h5 46. Bd4 Bd6 47. Nd1 f4 48. Nc3 fxg3+ 49. hxg3 Bd7 50. Ne4 Be7 51. Nc3 Ke6 52. e4 Bc6 53. f4 Bd6 54. Ke3 gxf4+ 55. gxf4 f5 56. Bc5 Bb8 57. Ne2 Bxe4 58. Ng3 h4 59. Nxe4 fxe4 60. Kxe4 h3 61. f5+ Kf7 62. Bg1 h2 63. Bxh2 Bxh2 64. Kd5 Bf4 1/2-1/2

[Event "Olympiad-36"]
[Site "Mallorca"]
[Date "2004.10.24"]
[Round "9"]
[White "Ferreira, Oscar"]
[Black "Ziyaev, Negmat"]
[Result "1/2-1/2"]
[ECO "D34"]
[WhiteElo "2284"]
[BlackElo "2295"]
[PlyCount "89"]
[EventDate "2004.10.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ESP"]
[SourceTitle "CBM 104"]
[Source "ChessBase"]
[SourceDate "2005.01.27"]
[SourceVersion "1"]
[SourceVersionDate "2005.01.27"]
[SourceQuality "1"]
[WhiteTeam "Paraguay"]
[BlackTeam "Tajikistan"]
[WhiteTeamCountry "PAR"]
[BlackTeamCountry "TJK"]

1. c4 e6 2. Nc3 d5 3. d4 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. 0-0 0-0 9. b3 Bg4 10. dxc5 Bxc5 11. Bb2 Re8 12. Rc1 Be7 13. Nd4 Rc8 14. h3 Be6 15. Na4 Nxd4 16. Qxd4 b6 17. Kh2 Qd7 18. Rxc8 Rxc8 19. Rc1 Rxc1 20. Bxc1 Qc6 21. Qc3 Qd7 22. Bb2 h5 23. h4 Ng4+ 24. Kg1 Bf6 25. Qd2 d4 26. Ba3 Qb5 27. Bf3 g6 28. Bc1 Bf5 29. Nb2 Ne5 30. Bg2 Qa6 31. Nd1 Bg4 32. Bf1 d3 33. Nc3 Qa5 34. Ne4 Qxd2 35. Nxf6+ Kg7 36. Bxd2 Kxf6 37. f4 Nc6 38. e4 Be2 39. Bxe2 dxe2 40. Kf2 b5 41. Kxe2 Ke6 42. Bc3 f5 43. Kd3 a6 44. a4 Kd6 45. a5 1/2-1/2

[Event "Olympiad-36"]
[Site "Mallorca"]
[Date "2004.10.23"]
[Round "8"]
[White "Ribera Baztan, Jose"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "A61"]
[WhiteElo "2147"]
[BlackElo "2284"]
[PlyCount "99"]
[EventDate "2004.10.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ESP"]
[SourceTitle "CBM 104"]
[Source "ChessBase"]
[SourceDate "2005.01.27"]
[SourceVersion "1"]
[SourceVersionDate "2005.01.27"]
[SourceQuality "1"]
[WhiteTeam "Andorra"]
[BlackTeam "Paraguay"]
[WhiteTeamCountry "AND"]
[BlackTeamCountry "PAR"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 d6 5. Nc3 exd5 6. cxd5 g6 7. Bf4 a6 8. a4 Bg7 9. h3 0-0 10. e3 Qe7 11. Be2 Nbd7 12. 0-0 Nh5 13. Bh2 f5 14. Nd2 Nhf6 15. Nc4 Ne8 16. a5 Rb8 17. Na4 Ne5 18. Rb1 g5 19. b4 cxb4 20. Rxb4 f4 21. exf4 gxf4 22. Nxe5 Bxe5 23. Bg4 Qg7 24. Bxc8 Rxc8 25. Qf3 Qf7 26. Qg4+ Ng7 27. Nb6 Rc5 28. Nd7 h5 29. Nxe5 dxe5 30. Qf3 Qxd5 31. Qxd5+ Rxd5 32. Rxb7 Rxa5 33. g3 Ne6 34. gxf4 exf4 35. Re1 Rf6 36. Re4 Rg6+ 37. Kf1 Ra1+ 38. Ke2 Ra2+ 39. Kf1 Ra1+ 40. Ke2 Ra2+ 41. Kf1 Rf6 42. Rc4 f3 43. Be5 Rf5 44. Rc8+ Rf8 45. Rc6 Rd2 46. Ke1 Rf7 47. Rb8+ Rd8 48. Rxe6 Rxb8 49. Bxb8 Rb7 50. Bf4 1-0

[Event "Olympiad-36"]
[Site "Mallorca"]
[Date "2004.10.22"]
[Round "7"]
[White "Ferreira, Oscar"]
[Black "Hernandez Basante, Francisco"]
[Result "1-0"]
[ECO "A30"]
[WhiteElo "2284"]
[BlackElo "2283"]
[PlyCount "75"]
[EventDate "2004.10.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ESP"]
[SourceTitle "CBM 104"]
[Source "ChessBase"]
[SourceDate "2005.01.27"]
[SourceVersion "1"]
[SourceVersionDate "2005.01.27"]
[SourceQuality "1"]
[WhiteTeam "Paraguay"]
[BlackTeam "Costa Rica"]
[WhiteTeamCountry "PAR"]
[BlackTeamCountry "CRI"]

1. c4 c5 2. Nf3 Nc6 3. g3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Nc2 Nh6 7. Bg2 Nf5 8. 0-0 0-0 9. Nd2 Rb8 10. Rb1 b5 11. cxb5 Rxb5 12. b4 d5 13. a4 Rb8 14. b5 Na5 15. e4 dxe4 16. Nxe4 Nc4 17. Bf4 e5 18. Qxd8 Rxd8 19. Bg5 Re8 20. Rfd1 Rb6 21. Bf1 Ncd6 22. Nf6+ Bxf6 23. Bxf6 Ne4 24. Bxe5 Rxe5 25. Rd8+ Kg7 26. Rxc8 Rf6 27. f4 Re7 28. Bg2 g5 29. Re1 gxf4 30. Rc6 f3 31. Bxf3 Ng5 32. Rxe7 Nxf3+ 33. Kf2 Nxe7 34. Rxf6 Kxf6 35. Kxf3 Nd5 36. Nd4 Nc3 37. a5 h6 38. b6 1-0

[Event "Olympiad-36"]
[Site "Mallorca"]
[Date "2004.10.20"]
[Round "6"]
[White "Bouaziz, Slim"]
[Black "Ferreira, Oscar"]
[Result "1/2-1/2"]
[ECO "B31"]
[WhiteElo "2341"]
[BlackElo "2284"]
[PlyCount "26"]
[EventDate "2004.10.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ESP"]
[SourceTitle "CBM 104"]
[Source "ChessBase"]
[SourceDate "2005.01.27"]
[SourceVersion "1"]
[SourceVersionDate "2005.01.27"]
[SourceQuality "1"]
[WhiteTeam "Tunisia"]
[BlackTeam "Paraguay"]
[WhiteTeamCountry "TUN"]
[BlackTeamCountry "PAR"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. Bxc6 dxc6 5. h3 e5 6. d3 Bg7 7. Be3 Qe7 8. Qd2 Nf6 9. Nc3 Nd7 10. Bh6 f6 11. Bxg7 Qxg7 12. Ne2 Nf8 13. Qe3 Qe7 1/2-1/2

[Event "Olympiad-36"]
[Site "Mallorca"]
[Date "2004.10.17"]
[Round "3"]
[White "Ferreira, Oscar"]
[Black "Solomon, Stephen J"]
[Result "0-1"]
[ECO "D12"]
[WhiteElo "2284"]
[BlackElo "2435"]
[PlyCount "102"]
[EventDate "2004.10.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ESP"]
[SourceTitle "CBM 104"]
[Source "ChessBase"]
[SourceDate "2005.01.27"]
[SourceVersion "1"]
[SourceVersionDate "2005.01.27"]
[SourceQuality "1"]
[WhiteTeam "Paraguay"]
[BlackTeam "Australia"]
[WhiteTeamCountry "PAR"]
[BlackTeamCountry "AUS"]

1. Nf3 d5 2. d4 c6 3. e3 Bf5 4. Bd3 e6 5. 0-0 Nd7 6. c4 Bxd3 7. Qxd3 Ngf6 8. Nc3 dxc4 9. Qxc4 Bd6 10. e4 e5 11. Bg5 h6 12. Bh4 Qe7 13. Rad1 0-0 14. Rfe1 Rfe8 15. Bg3 Nh5 16. Nh4 Nxg3 17. hxg3 Nb6 18. Qb3 exd4 19. Rxd4 Bc5 20. Rd3 Qe5 21. Red1 Qf6 22. Rf3 Qe6 23. Qxe6 Rxe6 24. Kf1 Nc4 25. Rfd3 Nxb2 26. Rd8+ Rxd8 27. Rxd8+ Kh7 28. Rd7 Re7 29. Rxe7 Bxe7 30. Nf5 Bb4 31. Nb1 Nd3 32. f4 Bc5 33. Nd2 g6 34. Nh4 Bf2 35. Ke2 Bxg3 36. Kxd3 Bxh4 37. Nc4 Bd8 38. Nd6 b6 39. e5 Kg7 40. Nc8 a6 41. Na7 c5 42. Nc6 Bc7 43. Ne7 b5 44. Nd5 Ba5 45. Ke4 h5 46. f5 gxf5+ 47. Kxf5 c4 48. Nf6 c3 49. Nxh5+ Kf8 50. Nf4 c2 51. Nd3 Ke7 0-1

[Event "Olympiad-36"]
[Site "Mallorca"]
[Date "2004.10.16"]
[Round "2"]
[White "Martis, Valentino"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "A08"]
[WhiteElo "2019"]
[BlackElo "2284"]
[PlyCount "102"]
[EventDate "2004.10.15"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "ESP"]
[SourceTitle "CBM 104"]
[Source "ChessBase"]
[SourceDate "2005.01.27"]
[SourceVersion "1"]
[SourceVersionDate "2005.01.27"]
[SourceQuality "1"]
[WhiteTeam "Netherlands Antilles"]
[BlackTeam "Paraguay"]
[WhiteTeamCountry "AHO"]
[BlackTeamCountry "PAR"]

1. g3 Nf6 2. Nf3 g6 3. Bg2 Bg7 4. 0-0 0-0 5. d3 d5 6. Nbd2 c5 7. e4 Nc6 8. exd5 Nxd5 9. Ne4 b6 10. Re1 Bb7 11. c3 Qd7 12. Neg5 Rad8 13. Bh3 Qc7 14. Nh4 e5 15. Be3 Nxe3 16. fxe3 Ba6 17. Qf3 Bxd3 18. Rad1 Ba6 19. Rxd8 Nxd8 20. Rd1 Bb7 21. Qe2 h6 22. Ngf3 Bc6 23. Qc4 Kh7 24. Qg4 Ne6 25. Bf1 h5 26. Qc4 Bh6 27. e4 b5 28. Qe2 c4 29. Bh3 Nc5 30. Nf5 gxf5 31. Bxf5+ Kg8 32. Ng5 Bxg5 33. Qxh5 f6 34. Rd7 Qxd7 35. Bxd7 Bxd7 36. Qg6+ Kh8 37. h4 Be3+ 38. Kg2 Bc6 39. Qh5+ Kg7 40. Qg4+ Kf7 41. Qh5+ Ke7 42. Kf3 Bc1 43. Ke2 Bxe4 44. Kd1 Rd8+ 45. Ke1 Bxb2 46. g4 Bxc3+ 47. Kf1 Rd1+ 48. Ke2 Re1+ 49. Kf2 Nd3+ 50. Kg3 Rg1+ 51. Kh2 Rg2+ 1-0

[Event "San Cristobal op"]
[Site "Asuncion"]
[Date "2002.07.??"]
[Round "?"]
[White "Gomez Baillo, Jorge H"]
[Black "Ferreira, Oscar"]
[Result "0-1"]
[ECO "B85"]
[WhiteElo "2450"]
[BlackElo "2263"]
[PlyCount "116"]
[EventDate "2002.07.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "PAR"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. Nf3 a6 4. d4 cxd4 5. Nxd4 Qc7 6. Be2 Nf6 7. 0-0 Be7 8. Kh1 0-0 9. f4 d6 10. Be3 Nc6 11. a4 Nxd4 12. Qxd4 e5 13. Qd3 exf4 14. Bxf4 Be6 15. Rad1 Rfd8 16. Qg3 Qc5 17. Bh6 g6 18. Be3 Qe5 19. Bf4 Qc5 20. Be3 Qe5 21. Qg5 Ng4 22. Qxe5 dxe5 23. Bb6 Rxd1 24. Rxd1 Kf8 25. Nd5 Bxd5 26. exd5 Nf6 27. c4 Nd7 28. Be3 Bd6 29. Rc1 Bc5 30. Bxc5+ Nxc5 31. a5 Nb3 32. Rc3 Nd4 33. Bd1 Ke7 34. c5 f5 35. Kg1 Rc8 36. d6+ Ke6 37. Kf2 e4 38. b4 Ke5 39. Ba4 f4 40. Bd7 Rd8 41. Bg4 h5 42. Bd1 e3+ 43. Kf1 Rh8 44. h4 Rg8 45. Bb3 Rg7 46. Ba4 Rf7 47. Bb3 Rf8 48. Bd1 Ke4 49. Be2 g5 50. hxg5 h4 51. Bg4 h3 52. gxh3 f3 53. d7 Ne2 54. Rc4+ Kd3 55. Bxf3 Rxf3+ 56. Ke1 Rf8 57. Rg4 Nd4 58. Rg3 Nc2+ 0-1

[Event "Asuncion Mayor op"]
[Site "Asuncion"]
[Date "2001.??.??"]
[Round "5"]
[White "Butti, Enrique"]
[Black "Ferreira, Oscar"]
[Result "1/2-1/2"]
[ECO "B20"]
[WhiteElo "2218"]
[BlackElo "2268"]
[PlyCount "55"]
[EventDate "2001.07.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. d3 Nc6 3. g3 d5 4. Nd2 g6 5. Bg2 e6 6. f4 Bg7 7. Ngf3 Nge7 8. 0-0 0-0 9. Re1 dxe4 10. dxe4 b6 11. e5 Bb7 12. Ne4 Qxd1 13. Rxd1 Rad8 14. Be3 Nf5 15. Bf2 Rxd1+ 16. Rxd1 Rd8 17. Rxd8+ Nxd8 18. Nfd2 h5 19. h3 Bf8 20. g4 hxg4 21. hxg4 Ne7 22. c4 Nec6 23. Nd6 Ba6 24. N2e4 Be7 25. a3 Kf8 26. g5 Na5 27. Bf1 Ndc6 28. Bd3 1/2-1/2

[Event "Asuncion Mayor op"]
[Site "Asuncion"]
[Date "2001.??.??"]
[Round "8"]
[White "Coronel, Dario"]
[Black "Ferreira, Oscar"]
[Result "0-1"]
[ECO "B48"]
[BlackElo "2268"]
[PlyCount "108"]
[EventDate "2001.07.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. d4 cxd4 5. Nxd4 Qc7 6. a3 Nc6 7. Be3 Nf6 8. Be2 Be7 9. 0-0 0-0 10. Kh1 d6 11. f4 Nxd4 12. Bxd4 e5 13. Be3 exf4 14. Rxf4 Be6 15. Qd2 Rac8 16. Raf1 Nd7 17. Bd3 Ne5 18. h3 Rfe8 19. R4f2 Bf8 20. Nd5 Bxd5 21. exd5 g6 22. Bd4 Re7 23. b3 Bg7 24. c4 Ng4 25. Rf4 Ne5 26. R4f2 Rce8 27. Bc2 f5 28. Re2 Nf7 29. Ref2 Bxd4 30. Qxd4 Qc5 31. Qxc5 dxc5 32. g4 fxg4 33. hxg4 Ne5 34. Rf4 Rf7 35. Be4 Rxf4 36. Rxf4 Nf7 37. Bg2 Kg7 38. b4 b6 39. bxc5 bxc5 40. Kh2 Re3 41. Rf3 Ne5 42. Rf1 Nxg4+ 43. Kg1 Rxa3 44. d6 Rb3 45. Bd5 Rb6 46. Rf7+ Kh6 47. d7 Rd6 48. Re7 Kg5 49. Bc6 Nf6 50. Re6 Rd1+ 51. Kf2 Nxd7 52. Bf3 Rd4 53. Rxa6 Rxc4 54. Ra7 Nf8 0-1

[Event "Asuncion Mayor op"]
[Site "Asuncion"]
[Date "2001.??.??"]
[Round "2"]
[White "Cubas, Jose Fernando"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "B21"]
[WhiteElo "2290"]
[BlackElo "2268"]
[PlyCount "58"]
[EventDate "2001.07.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. f4 d5 3. exd5 Qxd5 4. Nc3 Qd8 5. Nf3 Nf6 6. Ne5 Nbd7 7. Bb5 a6 8. Bxd7+ Bxd7 9. Qf3 Qc7 10. b3 g6 11. Bb2 Bg7 12. 0-0-0 0-0 13. Rhe1 b5 14. Nxd7 Qxd7 15. Qe3 Ra7 16. Qxc5 Rc8 17. Qb4 Rac7 18. Kb1 Qf5 19. Rc1 e6 20. Re5 Qg4 21. g3 Qf3 22. Re3 Qh5 23. h4 Qf5 24. a3 Bf8 25. Qa5 Ng4 26. Re2 Rc6 27. Ne4 Bg7 28. Bxg7 Kxg7 29. Qb4 R8c7 1-0

[Event "Asuncion Mayor op"]
[Site "Asuncion"]
[Date "2001.??.??"]
[Round "1"]
[White "Ferreira, Oscar"]
[Black "Abdo, Luis"]
[Result "1-0"]
[ECO "E90"]
[WhiteElo "2268"]
[PlyCount "57"]
[EventDate "2001.07.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. d4 0-0 6. h3 e5 7. d5 Na6 8. Bg5 Qe8 9. g4 Nc5 10. Nd2 c6 11. b4 Na6 12. Rb1 Nc7 13. Bd3 Bd7 14. Qf3 Qe7 15. Qe3 Qe8 16. 0-0 cxd5 17. exd5 b5 18. Bxf6 Bxf6 19. Nde4 Be7 20. c5 f5 21. Nxd6 Bxd6 22. cxd6 fxg4 23. dxc7 Rf3 24. Qg5 h6 25. Qxg6+ Qxg6 26. Bxg6 Rxc3 27. Rbc1 Rxh3 28. d6 Kg7 29. Be4 1-0

[Event "Asuncion Mayor op"]
[Site "Asuncion"]
[Date "2001.??.??"]
[Round "3"]
[White "Ferreira, Oscar"]
[Black "Espinoza, Edgar"]
[Result "1/2-1/2"]
[ECO "D13"]
[WhiteElo "2268"]
[BlackElo "2086"]
[PlyCount "32"]
[EventDate "2001.07.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. Nc3 Bf5 5. cxd5 cxd5 6. Qb3 Bc8 7. Bg5 e6 8. e3 Be7 9. Bd3 Nc6 10. 0-0 h6 11. Bh4 g5 12. Bg3 Nh5 13. Ne5 Nxg3 14. Nxc6 bxc6 15. hxg3 h5 16. Rac1 g4 1/2-1/2

[Event "Asuncion Mayor op"]
[Site "Asuncion"]
[Date "2001.??.??"]
[Round "6"]
[White "Ferreira, Oscar"]
[Black "Galeano, Mario"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "2268"]
[BlackElo "2089"]
[PlyCount "143"]
[EventDate "2001.07.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. cxd5 exd5 5. Nc3 Be7 6. Bg5 Nbd7 7. e3 0-0 8. Bd3 h6 9. Bf4 a6 10. Qc2 c5 11. h3 b5 12. dxc5 Nxc5 13. 0-0 Nxd3 14. Qxd3 Bb7 15. Rfd1 b4 16. Ne2 Ne4 17. Ned4 Bd6 18. Bxd6 Qxd6 19. Nb3 a5 20. Qxe4 dxe4 21. Rxd6 exf3 22. Nc5 Bc8 23. Rad1 fxg2 24. Kxg2 a4 25. R1d4 Ra5 26. Rc6 Rb5 27. Kg3 a3 28. b3 Bb7 29. Rc7 Bc8 30. h4 g6 31. Nd3 Be6 32. Rxb4 Rxb4 33. Nxb4 Ra8 34. Nc2 Bf5 35. Nd4 Bb1 36. Rc1 Bd3 37. Rd1 Be4 38. f3 Bb7 39. Rc1 Ba6 40. Rc3 Bf1 41. Kf2 Bh3 42. e4 Kf8 43. Ke3 Ke8 44. Rc7 Bd7 45. Rc5 Ke7 46. Kd2 f6 47. f4 Rb8 48. e5 fxe5 49. Rxe5+ Kd6 50. Ra5 Rf8 51. Ke3 Re8+ 52. Kf3 Bc8 53. Rxa3 Bb7+ 54. Kf2 Re4 55. Ne2 Kc5 56. Ra5+ Kb6 57. Re5 Rxe5 58. fxe5 Kc5 59. Ke3 g5 60. hxg5 hxg5 61. Nc3 Bc6 62. Ne4+ Kd5 63. Nxg5 Kxe5 64. Nf3+ Kd6 65. Ne1 Kc5 66. Kd2 Be8 67. Kc3 Kb5 68. Nc2 Bd7 69. Ne3 Be8 70. Nc4 Bd7 71. a4+ Kc5 72. b4+ 1-0

[Event "Asuncion Mayor op"]
[Site "Asuncion"]
[Date "2001.??.??"]
[Round "11"]
[White "Ferreira, Oscar"]
[Black "Peralta, Eduardo"]
[Result "1-0"]
[ECO "A98"]
[WhiteElo "2268"]
[BlackElo "2312"]
[PlyCount "69"]
[EventDate "2001.07.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 f5 2. d4 Nf6 3. g3 e6 4. Bg2 Be7 5. c4 0-0 6. 0-0 d6 7. Nc3 Qe8 8. Qc2 Qh5 9. e4 Nc6 10. exf5 e5 11. dxe5 dxe5 12. Nd5 Bxf5 13. Nxe7+ Nxe7 14. Qb3 e4 15. Nd4 Bh3 16. f3 Bxg2 17. Kxg2 exf3+ 18. Nxf3 Nf5 19. Bf4 Rae8 20. Rae1 Ng4 21. h3 Nf6 22. Bxc7 h6 23. Re5 Rxe5 24. Bxe5 Re8 25. Re1 Nd7 26. g4 Qg6 27. Qxb7 Nxe5 28. Qd5+ Kh7 29. Nxe5 Qg5 30. Qd3 g6 31. Nf3 Nh4+ 32. Kg3 Rxe1 33. Nxg5+ hxg5 34. Kf2 Re7 35. c5 1-0

[Event "Asuncion Mayor op"]
[Site "Asuncion"]
[Date "2001.??.??"]
[Round "9"]
[White "Ferreira, Oscar"]
[Black "Sosa Harrison, Jorge"]
[Result "1/2-1/2"]
[ECO "C68"]
[WhiteElo "2268"]
[BlackElo "2267"]
[PlyCount "13"]
[EventDate "2001.07.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 Bg4 6. h3 Bxf3 7. Qxf3 1/2-1/2

[Event "Asuncion Mayor op"]
[Site "Asuncion"]
[Date "2001.??.??"]
[Round "10"]
[White "Kropff, Ricardo"]
[Black "Ferreira, Oscar"]
[Result "1/2-1/2"]
[ECO "D40"]
[WhiteElo "2311"]
[BlackElo "2268"]
[PlyCount "11"]
[EventDate "2001.07.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. Nc3 c5 4. e3 Nc6 5. d4 d5 6. cxd5 1/2-1/2

[Event "Asuncion Mayor op"]
[Site "Asuncion"]
[Date "2001.??.??"]
[Round "7"]
[White "Valiente, Cristobal"]
[Black "Ferreira, Oscar"]
[Result "1/2-1/2"]
[ECO "C69"]
[WhiteElo "2373"]
[BlackElo "2268"]
[PlyCount "15"]
[EventDate "2001.07.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 f6 6. d4 exd4 7. Nxd4 c5 8. Nb3 1/2-1/2

[Event "Olympiad-34"]
[Site "Istanbul"]
[Date "2000.11.09"]
[Round "12.3"]
[White "Onkoud, Abdelaziz"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "B40"]
[WhiteElo "2309"]
[BlackElo "2266"]
[PlyCount "61"]
[EventDate "2000.10.28"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "TUR"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]
[WhiteTeam "Morocco"]
[BlackTeam "Paraguay"]
[WhiteTeamCountry "MAR"]
[BlackTeamCountry "PAR"]

1. e4 c5 2. Nf3 Nc6 3. c4 e6 4. Nc3 Nge7 5. d4 cxd4 6. Nxd4 Nxd4 7. Qxd4 Nc6 8. Qd2 Be7 9. Be2 0-0 10. 0-0 a6 11. Rd1 Bc5 12. b3 Qf6 13. Bf1 Bxf2+ 14. Qxf2 Qxc3 15. Ba3 Re8 16. Bb2 Qb4 17. e5 b6 18. Qf4 d5 19. exd6 e5 20. Qe3 Bg4 21. Rd5 b5 22. a3 Qa5 23. cxb5 axb5 24. d7 Red8 25. Bxb5 Rxd7 26. Rc5 Rad8 27. b4 Rd1+ 28. Rxd1 Rxd1+ 29. Kf2 Qd8 30. Rxc6 Qh4+ 31. Qg3 1-0

[Event "Olympiad-34"]
[Site "Istanbul"]
[Date "2000.11.07"]
[Round "10.3"]
[White "Wong, Zi Jing"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "B93"]
[WhiteElo "2300"]
[BlackElo "2266"]
[PlyCount "43"]
[EventDate "2000.10.28"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "TUR"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]
[WhiteTeam "Malaysia"]
[BlackTeam "Paraguay"]
[WhiteTeamCountry "MAS"]
[BlackTeamCountry "PAR"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 Qc7 7. Bd3 g6 8. 0-0 Bg7 9. Nf3 Nbd7 10. Qe1 e5 11. a4 b6 12. Qh4 0-0 13. fxe5 dxe5 14. Bh6 Bb7 15. Ng5 Rae8 16. g4 Qc5+ 17. Kh1 Qe7 18. Rf3 Nh5 19. gxh5 Bxh6 20. hxg6 Qxg5 21. gxf7+ Rxf7 22. Rg3 1-0

[Event "Olympiad-34"]
[Site "Istanbul"]
[Date "2000.11.06"]
[Round "9.2"]
[White "Ferreira, Oscar"]
[Black "Elson, Askari"]
[Result "1-0"]
[ECO "E71"]
[WhiteElo "2266"]
[PlyCount "43"]
[EventDate "2000.10.28"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "TUR"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]
[WhiteTeam "Paraguay"]
[BlackTeam "Barbados"]
[WhiteTeamCountry "PAR"]
[BlackTeamCountry "BAR"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. d4 0-0 6. h3 e5 7. d5 Nbd7 8. Bg5 a5 9. Bd3 Nc5 10. Bc2 c6 11. 0-0 Qc7 12. a3 Re8 13. Rb1 h6 14. Be3 cxd5 15. cxd5 Bd7 16. Qd2 Kh7 17. b4 axb4 18. axb4 Na4 19. Bxa4 Bxa4 20. Rfc1 Qd7 21. b5 Qd8 22. Rb4 1-0

[Event "Olympiad-34"]
[Site "Istanbul"]
[Date "2000.11.05"]
[Round "8.3"]
[White "Ferreira, Oscar"]
[Black "Mollah Abdullah, Al Rakib"]
[Result "1/2-1/2"]
[ECO "A07"]
[WhiteElo "2266"]
[BlackElo "2386"]
[PlyCount "118"]
[EventDate "2000.10.28"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "TUR"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]
[WhiteTeam "Paraguay"]
[BlackTeam "Bangladesh"]
[WhiteTeamCountry "PAR"]
[BlackTeamCountry "BAN"]

1. Nf3 d5 2. g3 c6 3. Bg2 Bg4 4. 0-0 Nd7 5. d3 Ngf6 6. Nbd2 e6 7. e4 Be7 8. h3 Bh5 9. Qe1 0-0 10. b3 Bb4 11. g4 dxe4 12. dxe4 Bg6 13. Qe3 Qb6 14. Qe2 Bc3 15. Ba3 Bxa1 16. Bxf8 Rxf8 17. Rxa1 Qc5 18. Ne1 h5 19. Nc4 hxg4 20. hxg4 b5 21. Nd2 Ne5 22. Bf3 Nxf3+ 23. Qxf3 Qe5 24. Rd1 Nxg4 25. Qxg4 Bh5 26. Ndf3 Bxg4 27. Nxe5 Bxd1 28. Nxc6 Kh7 29. Nxa7 Ra8 30. Nxb5 Rxa2 31. Nc3 Ra1 32. Nxd1 Rxd1 33. Kf1 Rd2 34. f3 g5 35. b4 Rd4 36. Nd3 Rc4 37. Ne5 Rxc2 38. Nxf7 Kg6 39. Ne5+ Kf6 40. Nd3 Rd2 41. Nc5 Ke5 42. Ke1 Rd6 43. Ke2 Kd4 44. Nd3 Ra6 45. Nc5 Rb6 46. Kf2 g4 47. fxg4 e5 48. Kf3 Rxb4 49. Ne6+ Kc4 50. g5 Rb6 51. Nf8 Kd4 52. Nd7 Rg6 53. Kg4 Kxe4 54. Nf6+ Kd4 55. Kf5 Rg7 56. g6 Ra7 57. Nh5 e4 58. g7 Ra8 59. Nf4 Rg8 1/2-1/2

[Event "Olympiad-34"]
[Site "Istanbul"]
[Date "2000.11.02"]
[Round "6.4"]
[White "Ferreira, Oscar"]
[Black "Cilia Vincenti, Victor"]
[Result "1-0"]
[ECO "D14"]
[WhiteElo "2266"]
[BlackElo "2215"]
[PlyCount "107"]
[EventDate "2000.10.28"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "TUR"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]
[WhiteTeam "Paraguay"]
[BlackTeam "Malta"]
[WhiteTeamCountry "PAR"]
[BlackTeamCountry "MLT"]

1. Nf3 Nf6 2. c4 c6 3. d4 d5 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Bf5 7. Qb3 Na5 8. Qa4+ Bd7 9. Qc2 g6 10. e3 Bg7 11. Bd3 0-0 12. h3 Rc8 13. 0-0 a6 14. Rac1 b5 15. Qe2 Bf5 16. Bxf5 gxf5 17. Ne5 Nc4 18. Nd3 e6 19. b3 Nd6 20. Qb2 Qb6 21. Be5 Nd7 22. Bxg7 Kxg7 23. Ne2 Ne4 24. Nc5 Qa7 25. Rc2 Kg8 26. Rfc1 Nef6 27. Nf4 Nb6 28. Nfd3 a5 29. Ne5 Rfd8 30. f3 Ne8 31. g4 Nd6 32. Rg2 Kh8 33. Qf2 Qe7 34. Kh1 Rg8 35. Rcg1 f6 36. Qh4 f4 37. exf4 Rc7 38. Ned3 Qf7 39. Re2 Re7 40. Rge1 Rge8 41. Re3 b4 42. Qg3 Nb5 43. f5 Nxd4 44. fxe6 Qg8 45. Qd6 Nc8 46. Qf4 Nc2 47. Qxf6+ Qg7 48. Qxg7+ Kxg7 49. f4 d4 50. Re5 Nxe1 51. Nxe1 Nb6 52. f5 Kf6 53. Nf3 h6 54. Ne4+ 1-0

[Event "Olympiad-34"]
[Site "Istanbul"]
[Date "2000.11.01"]
[Round "5.4"]
[White "Wastney, Scott C"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "E68"]
[WhiteElo "2219"]
[BlackElo "2266"]
[PlyCount "99"]
[EventDate "2000.10.28"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "TUR"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]
[WhiteTeam "New Zealand"]
[BlackTeam "Paraguay"]
[WhiteTeamCountry "NZL"]
[BlackTeamCountry "PAR"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 0-0 5. Nc3 d6 6. d4 Nbd7 7. 0-0 e5 8. h3 a6 9. e4 Rb8 10. Rb1 exd4 11. Nxd4 Re8 12. Re1 Ne5 13. b3 c5 14. Nc2 b5 15. cxb5 axb5 16. f4 Nh5 17. fxe5 Bxe5 18. Ne2 Nxg3 19. Nxg3 Bxg3 20. Rf1 Qh4 21. Qf3 f5 22. Bf4 Bxf4 23. Qxf4 Qxf4 24. Rxf4 fxe4 25. Ne3 Bb7 26. Rd1 Rbd8 27. Nd5 Kg7 28. Rxe4 Rxe4 29. Bxe4 Re8 30. Bg2 Re5 31. Nf4 Bxg2 32. Kxg2 g5 33. Nh5+ Kg6 34. Ng3 d5 35. Kf2 d4 36. b4 cxb4 37. Rxd4 Rc5 38. Rd6+ Kg7 39. Ne4 Rf5+ 40. Ke3 h6 41. Rd4 h5 42. Rxb4 Kg6 43. Rb2 g4 44. hxg4 hxg4 45. Rf2 Rd5 46. Rf4 b4 47. Rxg4+ Kf7 48. Rg2 Ke6 49. Rb2 Ra5 50. Kd4 1-0

[Event "Olympiad-34"]
[Site "Istanbul"]
[Date "2000.10.30"]
[Round "3.2"]
[White "Ferreira, Oscar"]
[Black "Ma, Ernesto"]
[Result "1-0"]
[ECO "D41"]
[WhiteElo "2266"]
[BlackElo "2200"]
[PlyCount "95"]
[EventDate "2000.10.28"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "TUR"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]
[WhiteTeam "Paraguay"]
[BlackTeam "Macau"]
[WhiteTeamCountry "PAR"]
[BlackTeamCountry "MAC"]

1. Nf3 Nf6 2. c4 e6 3. g3 c5 4. Bg2 Nc6 5. 0-0 Be7 6. Nc3 0-0 7. d4 d5 8. cxd5 Nxd5 9. Nxd5 exd5 10. dxc5 Bxc5 11. Bg5 f6 12. Bf4 Be6 13. Qa4 Qe7 14. Rac1 Rac8 15. a3 a5 16. Rfd1 Rfd8 17. Ne1 b6 18. Nd3 Nd4 19. Rd2 Nf5 20. Nxc5 Rxc5 21. Rxc5 Qxc5 22. Rc2 Qd4 23. Qxd4 Nxd4 24. Rd2 Nb3 25. Rd1 Rd7 26. h4 h6 27. h5 Kf7 28. Kf1 g5 29. hxg6+ Kxg6 30. Bf3 f5 31. Kg2 Nc5 32. Rh1 Rh7 33. Bh5+ Kf6 34. Be8 Ke7 35. Bg6 Rg7 36. Rxh6 b5 37. Be5 Rg8 38. Rh7+ Kd8 39. Bh5 b4 40. Ra7 bxa3 41. bxa3 Nb3 42. e3 Nd2 43. Rxa5 Nc4 44. Ra6 Bc8 45. Bf6+ Kc7 46. Ra7+ Bb7 47. Bf7 Ra8 48. Rxb7+ 1-0

[Event "Olympiad-34"]
[Site "Istanbul"]
[Date "2000.10.29"]
[Round "2.3"]
[White "Ferreira, Oscar"]
[Black "Fonseca Pinto, Carlos Arturo"]
[Result "0-1"]
[ECO "E90"]
[WhiteElo "2266"]
[PlyCount "108"]
[EventDate "2000.10.28"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "TUR"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]
[WhiteTeam "Paraguay"]
[BlackTeam "Sri Lanka"]
[WhiteTeamCountry "PAR"]
[BlackTeamCountry "SRI"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. d4 0-0 6. h3 Nbd7 7. Bg5 c5 8. d5 Qa5 9. Bd3 a6 10. a4 Rb8 11. 0-0 Re8 12. Re1 h6 13. Bh4 Nh5 14. Ra3 Ne5 15. Bf1 Bd7 16. g4 Nf4 17. Bg3 Nxh3+ 18. Bxh3 Nxc4 19. Rb3 Nxb2 20. Qc2 Nxa4 21. Nxa4 Bxa4 22. Qa2 b5 23. e5 dxe5 24. Rbe3 f6 25. Qb1 g5 26. Qg6 Qb6 27. Nh4 gxh4 28. g5 f5 29. Qxf5 e6 30. dxe6 Rf8 31. Qg6 hxg3 32. Rxg3 c4 33. Ree3 h5 34. Qxh5 Qd4 35. e7 Qd1+ 36. Qxd1 Bxd1 37. Be6+ Kh7 38. exf8Q Rxf8 39. Bf7 Rxf7 40. g6+ Kg8 41. gxf7+ Kxf7 42. Ra3 Ba4 43. Rxa4 bxa4 44. Rc3 a3 45. Rxc4 Bf8 46. Ra4 Ke6 47. Kf1 Kd5 48. Ke2 Bc5 49. f3 a5 50. Rxa5 Kc4 51. Ra6 Kb3 52. Kd3 a2 53. Rxa2 Kxa2 54. Kc4 Be3 0-1

[Event "Olympiad-34"]
[Site "Istanbul"]
[Date "2000.10.28"]
[Round "1.4"]
[White "Ferreira, Oscar"]
[Black "Bischoff, Klaus"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "2266"]
[BlackElo "2556"]
[PlyCount "82"]
[EventDate "2000.10.28"]
[EventType "team-swiss"]
[EventRounds "14"]
[EventCountry "TUR"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]
[WhiteTeam "Paraguay"]
[BlackTeam "Germany"]
[WhiteTeamCountry "PAR"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. g3 Bb4 7. Nde2 Nf6 8. Bg2 Be7 9. 0-0 0-0 10. h3 Nc6 11. Be3 d6 12. g4 b5 13. g5 Nd5 14. Ng3 Bb7 15. f4 Na5 16. Qe2 Rfe8 17. f5 Bf8 18. Qf2 Nc4 19. fxe6 fxe6 20. Qf7+ Kh8 21. Bd4 Ne5 22. Qh5 Kg8 23. Rf2 g6 24. Qe2 Bg7 25. Kh1 b4 26. Nd1 Ng4 27. Qxg4 Bxd4 28. Rd2 Bg7 29. Ne3 Qc5 30. Qe2 Bxb2 31. Rad1 Be5 32. Ngf1 Bf4 33. Rd4 a5 34. Qg4 Be5 35. R4d2 Ba6 36. Nxd5 exd5 37. Qd7 dxe4 38. h4 Bc4 39. Bh3 Rad8 40. Qb7 Rf8 41. Kg2 Rf2+ 0-1

[Event "PAR-ch Mayor"]
[Site "Asuncion"]
[Date "1998.06.21"]
[Round "11"]
[White "Ferreira, Oscar"]
[Black "Peralta, Eduardo"]
[Result "0-1"]
[ECO "A25"]
[WhiteElo "2290"]
[BlackElo "2330"]
[PlyCount "26"]
[EventDate "1998.06.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Rb1 d6 6. b4 Nf6 7. e3 0-0 8. Nge2 Nh5 9. 0-0 f5 10. f4 h6 11. d3 exf4 12. Nxf4 Nxf4 13. gxf4 Bxc3 0-1

[Event "PAR-ch Mayor"]
[Site "Asuncion"]
[Date "1998.06.21"]
[Round "10"]
[White "Galeano, Mario"]
[Black "Ferreira, Oscar"]
[Result "0-1"]
[ECO "B50"]
[BlackElo "2290"]
[PlyCount "60"]
[EventDate "1998.06.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 d6 2. d3 c5 3. Be2 Nc6 4. Nf3 g6 5. c3 Bg7 6. Nbd2 Nf6 7. 0-0 0-0 8. Re1 e5 9. a4 b6 10. Bf1 Re8 11. Qc2 Bb7 12. Nc4 h6 13. b3 Rc8 14. Bb2 d5 15. exd5 Nxd5 16. Rad1 Qd7 17. Bc1 Rcd8 18. h3 Nxc3 19. Qxc3 e4 20. Nfe5 Nxe5 21. dxe4 Qxd1 22. Rxd1 Rxd1 23. Qc2 Red8 24. Nd2 Re1 25. Kh2 Rxd2 26. Bxd2 Bxe4 27. Qa2 Rxf1 28. Be3 Nd3 29. Kg3 Be5+ 30. f4 Nxf4 0-1

[Event "PAR-ch Mayor"]
[Site "Asuncion"]
[Date "1998.06.20"]
[Round "9"]
[White "Ferreira, Oscar"]
[Black "Cubas, Jose Fernando"]
[Result "0-1"]
[ECO "D36"]
[WhiteElo "2290"]
[BlackElo "2150"]
[PlyCount "56"]
[EventDate "1998.06.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. Nf3 c6 5. cxd5 exd5 6. Bg5 Be7 7. e3 0-0 8. Bd3 Nbd7 9. Qc2 Re8 10. h3 Nf8 11. 0-0 g6 12. Rab1 a5 13. a3 Ne6 14. Bh6 Ng7 15. b4 axb4 16. axb4 Bf5 17. b5 Bxd3 18. Qxd3 Ra3 19. Qc2 Qa5 20. Rb3 Rc8 21. Rxa3 Bxa3 22. Qd3 Bb4 23. Ne2 Bd6 24. Rc1 Ne4 25. bxc6 bxc6 26. Bxg7 Kxg7 27. g3 Rb8 28. Qc2 Qa3 0-1

[Event "PAR-ch Mayor"]
[Site "Asuncion"]
[Date "1998.06.20"]
[Round "8"]
[White "Patriarca, Luis"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "E76"]
[WhiteElo "2295"]
[BlackElo "2290"]
[PlyCount "69"]
[EventDate "1998.06.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 c5 6. dxc5 Qa5 7. Bd3 Qxc5 8. Qe2 Bg4 9. Nf3 Nc6 10. Be3 Qa5 11. 0-0 0-0 12. Rac1 Nd7 13. Qf2 Bxf3 14. gxf3 Rfe8 15. Kh1 Rac8 16. Rg1 a6 17. Rg5 Qd8 18. b3 e6 19. Ne2 Bf6 20. Rgg1 Qa5 21. Bb1 Qh5 22. Rcd1 Be7 23. e5 Bf8 24. Rg4 Ndxe5 25. fxe5 Nxe5 26. Rg3 Be7 27. Nf4 Qh4 28. Ng2 Qh5 29. Nf4 Qh4 30. Nd3 Nxd3 31. Bxd3 Qh5 32. Qg2 b5 33. Rh3 Qe5 34. f4 Qc3 35. cxb5 1-0

[Event "PAR-ch Mayor"]
[Site "Asuncion"]
[Date "1998.06.14"]
[Round "7"]
[White "Ferreira, Oscar"]
[Black "Gamarra Caceres, Carlos"]
[Result "1-0"]
[ECO "A89"]
[WhiteElo "2290"]
[BlackElo "2335"]
[PlyCount "65"]
[EventDate "1998.06.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 f5 2. Nf3 Nf6 3. g3 g6 4. Bg2 Bg7 5. 0-0 0-0 6. c4 d6 7. Nc3 Nc6 8. b3 e5 9. dxe5 dxe5 10. Ba3 e4 11. Bxf8 Qxf8 12. Ng5 h6 13. Nh3 g5 14. Rc1 Be6 15. e3 Rd8 16. Qe2 Bf7 17. Nd5 Nxd5 18. cxd5 Bxd5 19. Rfd1 Qf7 20. f3 exf3 21. Bxf3 Bxf3 22. Rxd8+ Nxd8 23. Qxf3 g4 24. Qd1 Qe7 25. Nf2 Nf7 26. Qd5 Be5 27. Rd1 Kg7 28. e4 fxe4 29. Qxe4 h5 30. Qf5 Bd6 31. Qxh5 Ne5 32. Qf5 Qe8 33. Nxg4 1-0

[Event "PAR-ch Mayor"]
[Site "Asuncion"]
[Date "1998.06.14"]
[Round "6"]
[White "Vera, I Jorge"]
[Black "Ferreira, Oscar"]
[Result "1/2-1/2"]
[ECO "E61"]
[BlackElo "2290"]
[PlyCount "98"]
[EventDate "1998.06.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. Nc3 0-0 5. Bg5 d6 6. e3 Nbd7 7. Be2 c6 8. 0-0 h6 9. Bh4 g5 10. Bg3 Nh5 11. Nd2 Nxg3 12. hxg3 e5 13. d5 c5 14. Nde4 Nf6 15. Nxf6+ Qxf6 16. e4 Qg6 17. g4 Bf6 18. g3 Bd8 19. Qc2 a6 20. a4 Ba5 21. Nd1 Qf6 22. Ne3 Re8 23. Kg2 Kg7 24. Rh1 Bd7 25. Rh2 Rh8 26. Nf5+ Bxf5 27. gxf5 Qd8 28. Qb3 Rb8 29. Qf3 Qe7 30. Rah1 Bd8 31. Qg4 Qc7 32. Rh5 Bf6 33. Qh3 Kf8 34. Rxh6 Rxh6 35. Qxh6+ Ke7 36. Qh5 Qb6 37. Rb1 Qb3 38. Qf3 Qxa4 39. b3 Qa2 40. Qd3 b5 41. Qd1 Qa5 42. Ra1 Qb6 43. Qd2 Kd7 44. Qa5 Kc7 45. Qxa6 Qxa6 46. Rxa6 bxc4 47. Ra7+ Kb6 48. Rxf7 cxb3 49. Rxf6 b2 1/2-1/2

[Event "PAR-ch Mayor"]
[Site "Asuncion"]
[Date "1998.06.13"]
[Round "4"]
[White "Ferreira, Oscar"]
[Black "Lipiniks, Leonardo"]
[Result "1-0"]
[ECO "D10"]
[WhiteElo "2290"]
[BlackElo "2155"]
[PlyCount "102"]
[EventDate "1998.06.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. Bf4 Nc6 6. e3 e6 7. Rc1 Bd6 8. Bxd6 Qxd6 9. f4 Ne4 10. Nxe4 dxe4 11. Ne2 0-0 12. Nc3 f5 13. Bb5 Bd7 14. Bxc6 Bxc6 15. 0-0 Rac8 16. Qb3 Kh8 17. a3 b6 18. Rf2 Bd5 19. Qa4 Qc6 20. Qxa7 Rc7 21. Qa6 Ra8 22. Qf1 Bc4 23. Qd1 Bd3 24. Na2 Qd7 25. Rxc7 Qxc7 26. Nb4 Bb5 27. Rc2 Qd6 28. Qc1 g5 29. Rc8+ Rxc8 30. Qxc8+ Kg7 31. g3 gxf4 32. gxf4 Qe7 33. Qb8 Be2 34. Qe5+ Kf7 35. d5 Bc4 36. Qxe6+ Qxe6 37. dxe6+ Kxe6 38. Nc6 Bd3 39. Nd4+ Kf6 40. Kf2 Ba6 41. Kg3 Bc8 42. Kh4 Kg6 43. Nc6 Kh6 44. Ne7 Be6 45. Nc6 Kg6 46. Nd4 Bd7 47. b3 b5 48. Ne2 Be8 49. Nc3 h6 50. a4 bxa4 51. bxa4 Kf6 1-0

[Event "PAR-ch Mayor"]
[Site "Asuncion"]
[Date "1998.06.13"]
[Round "5"]
[White "Ferreira, Oscar"]
[Black "Valiente, Cristobal"]
[Result "1/2-1/2"]
[ECO "E00"]
[WhiteElo "2290"]
[BlackElo "2400"]
[PlyCount "14"]
[EventDate "1998.06.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 a5 5. Bg2 0-0 6. Qc2 Nc6 7. Nf3 d6 1/2-1/2

[Event "PAR-ch Mayor"]
[Site "Asuncion"]
[Date "1998.06.12"]
[Round "2"]
[White "Ferreira, Oscar"]
[Black "Zarza, Ronald"]
[Result "1-0"]
[ECO "E93"]
[WhiteElo "2290"]
[PlyCount "61"]
[EventDate "1998.06.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. d5 Nbd7 8. Bg5 Qe8 9. Nd2 Nc5 10. b4 Na6 11. a3 h6 12. Be3 Qe7 13. c5 Nxe4 14. Ncxe4 f5 15. cxd6 cxd6 16. 0-0 fxe4 17. Nxe4 Bf5 18. Ng3 Nc7 19. Qd2 Kh7 20. Rac1 b6 21. Rc6 Rac8 22. Rfc1 h5 23. Nxf5 Rxf5 24. Ba6 Rcf8 25. Rxc7 Qh4 26. g3 Qf6 27. Bd3 Rf3 28. Bg5 Rxf2 29. Bxf6 Rxd2 30. Rxg7+ Kh8 31. Rxa7+ 1-0

[Event "PAR-ch Mayor"]
[Site "Asuncion"]
[Date "1998.06.12"]
[Round "3"]
[White "Figari, Esteban"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "B43"]
[WhiteElo "2080"]
[BlackElo "2290"]
[PlyCount "73"]
[EventDate "1998.06.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. a4 Qc7 5. d4 cxd4 6. Nxd4 Bb4 7. Bd2 Nf6 8. Bd3 Nc6 9. Nxc6 dxc6 10. 0-0 Bd6 11. f4 e5 12. f5 h5 13. Qe1 Qe7 14. Nd1 Bd7 15. Ne3 Bc5 16. Kh1 h4 17. h3 Nh5 18. Rf3 Rd8 19. Rd1 Bc8 20. Ng4 b5 21. Ba5 Rd7 22. Bc3 Bd4 23. Bxd4 Rxd4 24. axb5 cxb5 25. c3 Rd6 26. Bc2 Rxd1 27. Qxd1 Bb7 28. Kh2 Bc6 29. Qe1 Nf4 30. Qf2 f6 31. Qb6 Bb7 32. c4 Ne2 33. cxb5 Nd4 34. Rc3 Nxb5 35. Ba4 0-0 36. Bxb5 axb5 37. Rc7 1-0

[Event "PAR-ch Mayor"]
[Site "Asuncion"]
[Date "1998.06.11"]
[Round "1"]
[White "Medina, Vicente"]
[Black "Ferreira, Oscar"]
[Result "0-1"]
[ECO "A04"]
[BlackElo "2290"]
[PlyCount "74"]
[EventDate "1998.06.11"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "PAR"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d3 Nc6 4. g3 g6 5. Bg2 Bg7 6. c3 e6 7. 0-0 Nge7 8. Na3 0-0 9. Nc2 e5 10. d4 Qc7 11. d5 Nd8 12. Nh4 f6 13. f4 Nf7 14. f5 gxf5 15. exf5 b5 16. Qh5 Bb7 17. Rd1 c4 18. Be4 a5 19. Be3 Rfc8 20. Nf3 Qd8 21. h4 Qe8 22. g4 Nh6 23. Qxe8+ Rxe8 24. g5 Nhxf5 25. Kf2 Nxe3 26. Nxe3 Rf8 27. gxf6 Rxf6 28. Ke2 Rf4 29. Ng5 h6 30. Bh7+ Kh8 31. Ne6 Kxh7 32. Rg1 Rf7 33. Ng4 Bxd5 34. Nxg7 Bf3+ 35. Kd2 Bxg4 36. Rxg4 Rxg7 37. Rxg7+ Kxg7 0-1

[Event "San Cristobal op"]
[Site "San Cristobal"]
[Date "1998.??.??"]
[Round "6"]
[White "Ferreira, Oscar"]
[Black "Arias, Vidal"]
[Result "1-0"]
[ECO "D51"]
[WhiteElo "2290"]
[PlyCount "67"]
[EventDate "1998.05.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "PAR"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. c4 e6 2. Nc3 Nf6 3. d4 d5 4. Nf3 Nbd7 5. cxd5 exd5 6. Bg5 c6 7. Qc2 Qa5 8. Bxf6 Nxf6 9. e3 Bb4 10. Bd3 h6 11. 0-0 0-0 12. Ne5 Bxc3 13. bxc3 Be6 14. Rab1 Qc7 15. f3 c5 16. Qb2 Rab8 17. Rfc1 c4 18. Bc2 b5 19. a4 a6 20. Qa3 Rfe8 21. axb5 axb5 22. Qa6 Qb6 23. Qxb6 Rxb6 24. Rb2 Nd7 25. Nxd7 Bxd7 26. e4 Bc6 27. exd5 Bxd5 28. Kf2 Kf8 29. Rcb1 Reb8 30. Be4 Be6 31. Rb4 f5 32. Bc2 Ke7 33. Re1 f4 34. Bf5 1-0

[Event "San Cristobal op"]
[Site "San Cristobal"]
[Date "1998.??.??"]
[Round "2"]
[White "Ferreira, Oscar"]
[Black "Gonzalez, Ruben"]
[Result "1-0"]
[ECO "E81"]
[WhiteElo "2290"]
[PlyCount "69"]
[EventDate "1998.05.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "PAR"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. f3 0-0 6. Bg5 Nbd7 7. Qd2 Re8 8. Nge2 c5 9. d5 a6 10. Nc1 Rb8 11. Rb1 Nf8 12. Be2 Bd7 13. f4 Qc7 14. e5 Ng4 15. e6 Bxe6 16. dxe6 Nxe6 17. Nd5 Qd7 18. Bxg4 f5 19. Be2 Nd4 20. 0-0 e6 21. Nf6+ Bxf6 22. Bxf6 e5 23. Nb3 Qe6 24. Bg5 Kg7 25. Nxd4 cxd4 26. Bf3 h6 27. Bd5 Qd7 28. Bxh6+ Kxh6 29. fxe5+ g5 30. e6 Qh7 31. Rf3 Qg6 32. Rh3+ Kg7 33. Qxd4+ Kf8 34. Qh8+ Ke7 35. Qh7+ 1-0

[Event "San Cristobal op"]
[Site "San Cristobal"]
[Date "1998.??.??"]
[Round "4"]
[White "Ferreira, Oscar"]
[Black "Peralta, Eduardo"]
[Result "1/2-1/2"]
[ECO "C92"]
[WhiteElo "2290"]
[BlackElo "2330"]
[PlyCount "20"]
[EventDate "1998.05.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "PAR"]
[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 Be7 7. Re1 d6 8. c3 0-0 9. h3 Re8 10. Ng5 Rf8 1/2-1/2

[Event "San Cristobal op"]
[Site "San Cristobal"]
[Date "1998.??.??"]
[Round "5"]
[White "Gomez, Candido"]
[Black "Ferreira, Oscar"]
[Result "0-1"]
[ECO "A69"]
[BlackElo "2290"]
[PlyCount "40"]
[EventDate "1998.05.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "PAR"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 d6 2. d4 g6 3. c4 Nf6 4. Nc3 Bg7 5. Be2 0-0 6. f4 c5 7. d5 e6 8. Nf3 exd5 9. cxd5 Re8 10. Qc2 Na6 11. Bxa6 bxa6 12. 0-0 Rb8 13. Rb1 Nxe4 14. Nxe4 Rxe4 15. h3 Qe7 16. Bd2 Re2 17. g4 h5 18. f5 hxg4 19. hxg4 Rb4 20. fxg6 Rxg4+ 0-1

[Event "San Cristobal op"]
[Site "San Cristobal"]
[Date "1998.??.??"]
[Round "3"]
[White "Lipiniks, Leonardo"]
[Black "Ferreira, Oscar"]
[Result "0-1"]
[ECO "B50"]
[WhiteElo "2155"]
[BlackElo "2290"]
[PlyCount "64"]
[EventDate "1998.05.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "PAR"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 d6 2. Nf3 c5 3. c3 Nf6 4. Be2 Nc6 5. d3 g6 6. 0-0 Bg7 7. h3 0-0 8. Re1 e5 9. Bf1 Re8 10. c4 a6 11. Nc3 Rb8 12. Nd5 Nxd5 13. cxd5 Nd4 14. Nxd4 exd4 15. Bd2 f5 16. exf5 Rxe1 17. Qxe1 Bxf5 18. g4 Bd7 19. b4 Qf6 20. Bg2 Re8 21. Be4 c4 22. Qc1 Rxe4 23. dxe4 d3 24. Rb1 c3 25. Rb3 cxd2 26. Qxd2 Bb5 27. Kg2 Qd4 28. f3 Qa1 29. Kg3 Qg1+ 30. Kh4 Bf6+ 31. g5 Bxg5+ 32. Qxg5 Qf2+ 0-1

[Event "San Cristobal op"]
[Site "San Cristobal"]
[Date "1998.??.??"]
[Round "1"]
[White "Medina, Vicente"]
[Black "Ferreira, Oscar"]
[Result "0-1"]
[ECO "B42"]
[BlackElo "2290"]
[PlyCount "73"]
[EventDate "1998.05.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "PAR"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Be3 Nf6 6. Bd3 Nc6 7. Nb3 d5 8. exd5 Nxd5 9. Be4 Nxe3 10. Qxd8+ Kxd8 11. fxe3 Kc7 12. c3 Be7 13. Rf1 f5 14. Bc2 Bd6 15. g3 h5 16. N1d2 h4 17. Nc4 Be7 18. 0-0-0 hxg3 19. hxg3 b5 20. Ncd2 Bg5 21. e4 Ne5 22. Kb1 g6 23. Nf3 Nxf3 24. Rxf3 Be7 25. exf5 exf5 26. Re1 Bd6 27. Nd4 Bd7 28. b4 Rae8 29. Rxe8 Rxe8 30. Bb3 Re1+ 31. Kc2 Rg1 32. Ne2 Rg2 33. Kd3 Bc6 34. Re3 Be4+ 35. Kd4 Bf8 36. Bd5 Bh6 37. Nf4 0-1

[Event "Mexico City op"]
[Site "Mexico City"]
[Date "1991.??.??"]
[Round "4"]
[White "Ferreira, Oscar"]
[Black "Sieiro Gonzalez, Luis"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "2275"]
[BlackElo "2390"]
[PlyCount "48"]
[EventDate "1991.07.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "MEX"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. 0-0 d6 6. Bg5 h6 7. Bxf6 Qxf6 8. Nc3 Ne7 9. d4 exd4 10. Nb5 Bb6 11. Nbxd4 Bg4 12. c3 Ng6 13. Qa4+ Kf8 14. h3 h5 15. Nh2 Nf4 16. Kh1 Re8 17. f3 Bc8 18. Ne2 Rh6 19. Nxf4 Qxf4 20. Qc2 Rg6 21. Rad1 Re5 22. Rd5 Rxd5 23. Bxd5 c6 24. Bb3 Qg3 0-1

[Event "Mexico City op"]
[Site "Mexico City"]
[Date "1991.??.??"]
[Round "3"]
[White "Ferreira, Oscar"]
[Black "Sunye Neto, Jaime"]
[Result "1-0"]
[ECO "B87"]
[WhiteElo "2275"]
[BlackElo "2475"]
[PlyCount "75"]
[EventDate "1991.07.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "MEX"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[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 Bb7 9. Bg5 Nbd7 10. Re1 h6 11. Bh4 g5 12. Bg3 Ne5 13. Qe2 Be7 14. Rad1 Qb6 15. Nf3 Qc7 16. Nd4 b4 17. Ba4+ Kf8 18. Nb1 Bxe4 19. Nd2 Bd5 20. Nf1 Nc4 21. Bc6 Bxc6 22. Qxc4 Rc8 23. Rxe6 Qd7 24. Ree1 Bf3 25. Qxb4 Bxd1 26. Rxd1 Ne4 27. Ne3 Rc5 28. Nb3 Qe6 29. Nxc5 dxc5 30. Qc4 Bf6 31. Qxe6 fxe6 32. Nc4 Kf7 33. Rd7+ Kg6 34. Be5 Rf8 35. f3 Bxe5 36. Nxe5+ Kf5 37. Nc6 Nf6 38. g4+ 1-0

[Event "Asuncion+"]
[Site "Asuncion"]
[Date "1983.??.??"]
[Round "1"]
[White "Ferreira, Oscar"]
[Black "Bogda, Alejandro"]
[Result "1/2-1/2"]
[ECO "E74"]
[PlyCount "54"]
[EventDate "1983.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "PAR"]
[EventCategory "4"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Bg5 c5 7. d5 b5 8. cxb5 a6 9. a4 Qa5 10. Bd2 Qb4 11. f3 c4 12. Qc1 Nfd7 13. Nd1 Qc5 14. b6 a5 15. Qxc4 Qxb6 16. Rc1 Ba6 17. Qc7 Qb3 18. Bxa6 Rxa6 19. Qc2 Qb7 20. Ne2 Nc5 21. Bc3 Nbd7 22. 0-0 Nb3 23. Bxg7 Kxg7 24. Qc3+ Kg8 25. Qc7 Ra7 26. Qxb7 Rxb7 27. Rc2 Ndc5 1/2-1/2

[Event "Asuncion+"]
[Site "Asuncion"]
[Date "1983.??.??"]
[Round "5"]
[White "Ferreira, Oscar"]
[Black "Braga, Fernando Alberto"]
[Result "0-1"]
[ECO "D23"]
[BlackElo "2440"]
[PlyCount "80"]
[EventDate "1983.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "PAR"]
[EventCategory "4"]
[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 dxc4 4. Qa4+ Nc6 5. Nc3 Bd7 6. Qxc4 e6 7. e4 Nb4 8. Qb3 c5 9. a3 cxd4 10. Nxd4 Nc6 11. Nxc6 Bxc6 12. Bb5 Qd7 13. Bxc6 Qxc6 14. Qc2 Bd6 15. f3 0-0 16. 0-0 Qb6+ 17. Kh1 Rac8 18. Qe2 Be5 19. Be3 Qb3 20. Rab1 b6 21. Bd2 Rfd8 22. Rfc1 Nh5 23. Be1 Nf4 24. Qc2 Qc4 25. Bg3 g5 26. Rd1 Rxd1+ 27. Rxd1 Bxc3 28. bxc3 Kg7 29. Qd2 Qc7 30. Be1 e5 31. g3 Qc4 32. Kg1 Ne6 33. Qd3 Qc5+ 34. Bf2 Qxc3 35. Qa6 Qxf3 36. Qxc8 Qxd1+ 37. Kg2 Qa4 38. Qb7 Qxa3 39. Qd5 Qb2 40. h3 a5 0-1

[Event "Asuncion+"]
[Site "Asuncion"]
[Date "1983.??.??"]
[Round "3"]
[White "Ferreira, Oscar"]
[Black "Franco Ocampos, Zenon"]
[Result "0-1"]
[ECO "E39"]
[BlackElo "2500"]
[PlyCount "34"]
[EventDate "1983.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "PAR"]
[EventCategory "4"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 0-0 5. Nf3 c5 6. dxc5 Na6 7. e3 Nxc5 8. a3 Bxc3+ 9. Qxc3 a5 10. Bd3 a4 11. 0-0 b6 12. Nd4 Ba6 13. b4 axb3 14. Nxb3 Nxd3 15. Qxd3 d5 16. Re1 Bxc4 17. Qc2 Ng4 0-1

[Event "Asuncion+"]
[Site "Asuncion"]
[Date "1983.??.??"]
[Round "2"]
[White "Gamarra Caceres, Carlos"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "A67"]
[PlyCount "69"]
[EventDate "1983.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "PAR"]
[EventCategory "4"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Bb5+ Nfd7 9. a4 Qh4+ 10. g3 Qd8 11. Nf3 0-0 12. 0-0 Na6 13. Re1 Nb4 14. e5 dxe5 15. fxe5 Nb6 16. Bg5 f6 17. Be3 fxe5 18. Bxc5 Rxf3 19. Qxf3 Nc2 20. d6 Nxa1 21. Rxa1 a6 22. Nd5 Nxd5 23. Qxd5+ Kh8 24. Bc4 Bd7 25. Qxb7 Qe8 26. Rd1 Rb8 27. Qxa6 Bxa4 28. b3 Bd7 29. Bd5 e4 30. Qc4 e3 31. Bd4 e2 32. Re1 Bb5 33. Qc3 Qf8 34. Bc4 Bxc4 35. bxc4 1-0

[Event "Asuncion+"]
[Site "Asuncion"]
[Date "1983.??.??"]
[Round "6"]
[White "Valiente, Cristobal"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "C78"]
[PlyCount "79"]
[EventDate "1983.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "PAR"]
[EventCategory "4"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Bc5 7. c3 0-0 8. d4 Bb6 9. Re1 d6 10. h3 Bb7 11. Bg5 h6 12. Bh4 Qe7 13. Na3 Na5 14. Bc2 c5 15. d5 c4 16. Nb1 Bc8 17. Nbd2 Kh7 18. g4 g5 19. Bg3 Rg8 20. Kg2 h5 21. Rh1 hxg4 22. hxg4+ Kg6 23. Nh2 Rh8 24. f3 Bd7 25. Qe2 Rh7 26. Bf2 Qd8 27. Ndf1 Qc7 28. Ng3 Bxf2 29. Qxf2 Rah8 30. Rag1 Ne8 31. Nhf1 Rxh1 32. Rxh1 Rxh1 33. Kxh1 Ng7 34. Ne3 Nb7 35. Nef5 f6 36. Qh2 Nxf5 37. exf5+ Kg7 38. Nh5+ Kf7 39. Nxf6 Kxf6 40. Qh8+ 1-0

[Event "Olympiad-24"]
[Site "Valetta"]
[Date "1980.12.04"]
[Round "13"]
[White "Ferreira, Oscar"]
[Black "Cherrad, Zitouni"]
[Result "1-0"]
[ECO "E60"]
[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 "Paraguay"]
[BlackTeam "Algeria"]
[WhiteTeamCountry "PAR"]
[BlackTeamCountry "ALG"]

1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 0-0 5. Bg2 c5 6. c4 Nc6 7. 0-0 d6 8. Nc3 Rb8 9. d4 cxd4 10. Nxd4 Bd7 11. Rc1 Re8 12. Qd2 Nxd4 13. Qxd4 a6 14. Qd2 Bc6 15. e4 Nd7 16. Nd5 Bxd5 17. cxd5 Bxb2 18. Qxb2 e5 19. dxe6 fxe6 20. Rfd1 Qb6 21. Qd4 Qxd4 22. Rxd4 Rbc8 23. Rxc8 Rxc8 24. Bh3 Rc1+ 25. Kg2 Nc5 26. Rxd6 Nxe4 27. Rxe6 Ng5 28. Re7 Nxh3 29. Kxh3 Rc2 30. a4 b5 31. axb5 axb5 32. Kg2 b4 33. Rb7 1-0

[Event "Olympiad-24"]
[Site "Valetta"]
[Date "1980.11.27"]
[Round "7"]
[White "Carvalho, Herbert Abreu"]
[Black "Ferreira, Oscar"]
[Result "1/2-1/2"]
[ECO "E55"]
[WhiteElo "2260"]
[PlyCount "131"]
[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 "Brazil"]
[BlackTeam "Paraguay"]
[WhiteTeamCountry "BRA"]
[BlackTeamCountry "PAR"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nf3 0-0 6. Bd3 d5 7. 0-0 dxc4 8. Bxc4 cxd4 9. exd4 b6 10. Qe2 Bb7 11. Rd1 Nbd7 12. Bg5 Bxc3 13. bxc3 Qc7 14. Nd2 Rac8 15. Rac1 Nd5 16. Bxd5 Bxd5 17. c4 Bb7 18. Qg4 f5 19. Qe2 Qc6 20. f3 Rfe8 21. Qd3 Qa4 22. Re1 g6 23. Rc3 Qc6 24. Rec1 Qd6 25. Nb3 Ba6 26. Qd2 e5 27. d5 Rc7 28. f4 e4 29. Nd4 Nc5 30. Ra3 e3 31. Rxe3 Ne4 32. Qe2 Qxd5 33. cxd5 Rxc1+ 34. Qe1 Rxe1+ 35. Rxe1 Bc4 36. Nc6 Kf7 37. Nxa7 Nxg5 38. Rxe8 Kxe8 39. fxg5 Kd7 40. a3 Bxd5 41. Nb5 Kc6 42. Nc3 Kc5 43. Na4+ Kb5 44. Nb2 Bc6 45. Kf2 Kc5 46. Nd3+ Kd4 47. Nf4 Kc3 48. h4 Kb3 49. h5 gxh5 50. Nxh5 Kxa3 51. Nf6 b5 52. Nxh7 Bd5 53. Nf6 Be6 54. g4 b4 55. gxf5 Bxf5 56. Nd5 b3 57. Ne3 Bd3 58. Nd1 Bc2 59. g6 Bxg6 60. Ke1 Bh5 61. Ne3 Bf7 62. Nd1 Bh5 63. Ne3 Be8 64. Kd2 Bg6 65. Kc3 Ka2 66. Nc4 1/2-1/2

[Event "Olympiad-24"]
[Site "Valetta"]
[Date "1980.11.26"]
[Round "6"]
[White "Fernandes, Antonio ETG"]
[Black "Ferreira, Oscar"]
[Result "0-1"]
[ECO "B80"]
[PlyCount "76"]
[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 "Portugal"]
[BlackTeam "Paraguay"]
[WhiteTeamCountry "POR"]
[BlackTeamCountry "PAR"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g3 Be7 7. Bg2 0-0 8. 0-0 Nc6 9. Nce2 Bd7 10. c4 a6 11. b3 Qc7 12. h3 Rab8 13. Be3 Nxd4 14. Nxd4 g6 15. Rc1 Qa5 16. Qd2 Qxd2 17. Bxd2 e5 18. Nc2 Rfc8 19. Ne3 Be6 20. Rc2 b5 21. Rfc1 Kf8 22. f3 Nh5 23. Kf2 Bd8 24. Bb4 Ke7 25. Rd1 Rb6 26. c5 Rbc6 27. Rxd6 Rxd6 28. cxd6+ Kd7 29. Rxc8 Kxc8 30. Nd5 Bxd5 31. exd5 Bb6+ 32. Ke2 Nxg3+ 33. Kd3 Kd7 34. h4 a5 35. Bh3+ f5 36. Be1 Nh5 37. b4 Nf4+ 38. Kc2 Nxh3 0-1

[Event "Olympiad-24"]
[Site "Valetta"]
[Date "1980.11.25"]
[Round "5"]
[White "Ferreira, Oscar"]
[Black "Hoi, Carsten"]
[Result "1/2-1/2"]
[ECO "E90"]
[BlackElo "2410"]
[PlyCount "81"]
[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 "Paraguay"]
[BlackTeam "Denmark"]
[WhiteTeamCountry "PAR"]
[BlackTeamCountry "DEN"]

1. Nf3 g6 2. c4 Bg7 3. Nc3 Nf6 4. e4 d6 5. d4 0-0 6. h3 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Nd5 Nxd5 10. cxd5 c6 11. Bc4 cxd5 12. Bxd5 Nc6 13. Bxc6 bxc6 14. 0-0 Be6 15. Bd2 Rab8 16. b3 f6 17. Rac1 Rbc8 18. Be3 Rd7 19. Rc2 Bf8 20. Rfc1 Rdc7 21. Bc5 Bh6 22. Rd1 Kf7 23. Kf1 Rb7 24. Ke2 a5 25. Rd3 Ra8 26. Bd6 a4 27. b4 Rd7 28. Bc5 Rxd3 29. Kxd3 a3 30. Kc3 Rd8 31. Nd2 Rxd2 32. Rxd2 Bxd2+ 33. Kxd2 f5 34. b5 cxb5 35. Bxa3 Bxa2 36. f3 Ke6 37. Ke3 Bc4 38. Bb4 h5 39. h4 Bf1 40. g3 Bc4 41. Bc3 1/2-1/2

[Event "Olympiad-24"]
[Site "Valetta"]
[Date "1980.11.23"]
[Round "4"]
[White "Ferreira, Oscar"]
[Black "Maya, Hermes"]
[Result "1-0"]
[ECO "A14"]
[BlackElo "2305"]
[PlyCount "61"]
[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 "Paraguay"]
[BlackTeam "Mexico"]
[WhiteTeamCountry "PAR"]
[BlackTeamCountry "MEX"]

1. c4 c5 2. Nc3 Nf6 3. g3 e6 4. Nf3 b6 5. Bg2 Bb7 6. 0-0 Be7 7. b3 0-0 8. Bb2 d5 9. cxd5 Nxd5 10. Rc1 Nd7 11. Qc2 Rc8 12. Qb1 Re8 13. Rfd1 e5 14. Nxd5 Bxd5 15. e4 Ba8 16. Nxe5 Nxe5 17. Bxe5 Bf6 18. d4 Bxe5 19. dxe5 Qe7 20. f4 Rcd8 21. Qc2 h6 22. Kf2 g5 23. Kg1 Bb7 24. Qe2 Bc8 25. Qh5 Kg7 26. Rd5 Bb7 27. f5 Kh7 28. Rxd8 Rxd8 29. e6 Rf8 30. Rd1 Bc8 31. e5 1-0

[Event "Olympiad-24"]
[Site "Valetta"]
[Date "1980.11.22"]
[Round "3"]
[White "Apol, Luitjen"]
[Black "Ferreira, Oscar"]
[Result "0-1"]
[ECO "B90"]
[PlyCount "70"]
[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 "Faroe Islands"]
[BlackTeam "Paraguay"]
[WhiteTeamCountry "FAI"]
[BlackTeamCountry "PAR"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. a4 e5 7. Nb3 Be6 8. Bg5 Be7 9. Bxf6 Bxf6 10. Nd5 Nd7 11. c4 0-0 12. Be2 Rc8 13. 0-0 g6 14. Rc1 Bg7 15. Nd2 Bh6 16. Nc3 Nc5 17. b4 Bxd2 18. Qxd2 Nb3 19. Qa2 Nxc1 20. Rxc1 Qb6 21. Qb3 a5 22. Nb5 axb4 23. Rd1 Rfd8 24. Qxb4 Qc5 25. Qb2 Ra8 26. Qb3 Ra6 27. g3 Rc8 28. Qc2 Bxc4 29. Bxc4 Qxc4 30. Qxc4 Rxc4 31. Nxd6 Rd4 32. Rxd4 exd4 33. Nxb7 Rxa4 34. Kf1 d3 35. f3 Ra1+ 0-1

[Event "Olympiad-24"]
[Site "Valetta"]
[Date "1980.11.20"]
[Round "1"]
[White "Gruenfeld, Yehuda"]
[Black "Ferreira, Oscar"]
[Result "1-0"]
[ECO "B80"]
[WhiteElo "2455"]
[PlyCount "69"]
[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 "Israel"]
[BlackTeam "Paraguay"]
[WhiteTeamCountry "ISR"]
[BlackTeamCountry "PAR"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. g3 a6 7. Bg2 Nf6 8. 0-0 d6 9. Re1 Bd7 10. Nxc6 bxc6 11. Na4 Be7 12. c4 Rb8 13. c5 dxc5 14. Qc2 0-0 15. Nxc5 Bc8 16. Nd3 Nd7 17. Bf4 e5 18. Be3 a5 19. Bh3 Nf6 20. Bxc8 Rfxc8 21. Bc5 Bxc5 22. Nxc5 Qb6 23. b3 Rd8 24. Rad1 Rxd1 25. Rxd1 Rd8 26. Rxd8+ Qxd8 27. Qc3 h5 28. Kg2 Qd1 29. Qxe5 Qc2 30. a4 h4 31. gxh4 Qd2 32. h3 Qd8 33. Qf5 Qd4 34. h5 Qd1 35. h6 1-0

[Event "Olympiad-22"]
[Site "Haifa"]
[Date "1976.11.09"]
[Round "13.4"]
[White "Ferreira, Oscar"]
[Black "Kagan, Shimon"]
[Result "0-1"]
[ECO "E81"]
[BlackElo "2430"]
[PlyCount "59"]
[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 "Paraguay"]
[BlackTeam "Israel"]
[WhiteTeamCountry "PAR"]
[BlackTeamCountry "ISR"]

1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 c6 5. Be3 a6 6. Qd2 b5 7. b3 Nf6 8. f3 Nbd7 9. Bd3 0-0 10. Nge2 e5 11. d5 b4 12. Na4 c5 13. g4 h5 14. h3 Nh7 15. h4 hxg4 16. h5 gxf3 17. Ng3 Ndf6 18. hxg6 fxg6 19. Bh6 Ra7 20. 0-0-0 Ng4 21. Bxg7 Rxg7 22. Kb1 Bd7 23. Nb2 Rgf7 24. Bf1 Qg5 25. Nd3 Qxd2 26. Rxd2 Ng5 27. Kc1 Rh7 28. Nf2 Nxf2 29. Rxf2 Rxh1 30. Nxh1 0-1

