[Event "Panamerican-chB U16 7th"]
[Site "Merlo"]
[Date "1990.07.??"]
[Round "11"]
[White "Mercado, Osvaldo"]
[Black "Silva, Sebastian"]
[Result "0-1"]
[ECO "B31"]
[PlyCount "78"]
[EventDate "1990.07.28"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. 0-0 Bg7 5. c3 Nf6 6. Re1 0-0 7. d4 cxd4 8. e5 Nd5 9. cxd4 d6 10. Nc3 Nb6 11. Bf4 Bg4 12. Bxc6 bxc6 13. h3 Bxf3 14. Qxf3 d5 15. Rac1 e6 16. Qg4 Nd7 17. Na4 Qa5 18. b3 Rfc8 19. Qe2 Qb4 20. Red1 c5 21. Rd3 cxd4 22. Rcd1 Qb5 23. h4 Rc6 24. Qe1 Qb8 25. Rxd4 Bxe5 26. Bxe5 Qxe5 27. Qa5 a6 28. g3 Rac8 29. R4d2 Qf5 30. Qb4 Ne5 31. Kg2 Qf3+ 32. Kg1 Rc1 33. Nb2 Qf6 34. Kg2 Nf3 35. Rxc1 Rxc1 36. Re2 Rg1+ 37. Kh3 Rh1+ 38. Kg2 Rh2+ 39. Kf1 Qf5 0-1

[Event "Panamerican-chB U16 7th"]
[Site "Merlo"]
[Date "1990.07.??"]
[Round "14"]
[White "Mercado, Osvaldo"]
[Black "Zarnicki, Pablo Adrian"]
[Result "0-1"]
[ECO "C04"]
[BlackElo "2435"]
[PlyCount "34"]
[EventDate "1990.07.28"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. Ngf3 Nf6 5. e5 Nd7 6. Nb3 Be7 7. c3 b6 8. Bd3 a5 9. a4 Ncb8 10. 0-0 Ba6 11. Re1 Bxd3 12. Qxd3 0-0 13. Bf4 c5 14. c4 Nc6 15. cxd5 Nb4 16. Qc3 Nxd5 17. Qd2 c4 0-1

[Event "Panamerican-chB U16 7th"]
[Site "Merlo"]
[Date "1990.07.??"]
[Round "10"]
[White "Peralta, Eduardo"]
[Black "Mercado, Osvaldo"]
[Result "1/2-1/2"]
[ECO "C06"]
[WhiteElo "2255"]
[PlyCount "12"]
[EventDate "1990.07.28"]
[EventType "tourn"]
[EventRounds "15"]
[EventCountry "ARG"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 b6 6. c3 c5 1/2-1/2

[Event "Pan American-ch U16 7th"]
[Site "Cubatao"]
[Date "1989.11.??"]
[Round "4"]
[White "Arraiz, Jose Miguel"]
[Black "Mercado, Osvaldo"]
[Result "0-1"]
[ECO "B82"]
[PlyCount "44"]
[EventDate "1989.11.24"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[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 Nf6 5. Nc3 d6 6. f4 Nc6 7. Be3 Be7 8. Qf3 e5 9. Nxc6 bxc6 10. fxe5 dxe5 11. Bc4 Qa5 12. Qg3 Ng4 13. Rf1 0-0 14. Bd2 Qd8 15. 0-0-0 Bh4 16. Qf3 Nxh2 17. Bxf7+ Kh8 18. Qh5 Bg4 19. Qxe5 Nxf1 20. Rxf1 Bf6 21. Qg3 Rxf7 22. Qxg4 Bxc3 0-1

[Event "Pan American-ch U16 7th"]
[Site "Cubatao"]
[Date "1989.11.??"]
[Round "3"]
[White "Da Silva, Alessandro Rodrigue"]
[Black "Mercado, Osvaldo"]
[Result "1/2-1/2"]
[ECO "A37"]
[PlyCount "75"]
[EventDate "1989.11.24"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e6 6. 0-0 Nge7 7. d3 0-0 8. Bd2 d6 9. Rb1 Bd7 10. a3 a5 11. Ne4 Qc7 12. b4 axb4 13. axb4 cxb4 14. Bxb4 Nxb4 15. Rxb4 Bc6 16. Qb3 Ra5 17. Nc3 Rfa8 18. Nb5 Qd7 19. Rb1 h6 20. Nbd4 Ra3 21. Qd1 e5 22. Nxc6 bxc6 23. Rb7 Qd8 24. Ne1 Ra2 25. Nc2 d5 26. cxd5 cxd5 27. Nb4 R2a7 28. Rxe7 Qxe7 29. Nc6 Qd7 30. Nxa7 Rxa7 31. Qb3 Ra5 32. Qb6 Ra8 33. Qc5 Rd8 34. Rb5 e4 35. Rb1 exd3 36. exd3 Qf5 37. Qc7 Rc8 38. Rb8 1/2-1/2

[Event "Pan American-ch U16 7th"]
[Site "Cubatao"]
[Date "1989.11.??"]
[Round "2"]
[White "Mercado, Osvaldo"]
[Black "Calderon, Anibal"]
[Result "1-0"]
[ECO "D00"]
[PlyCount "122"]
[EventDate "1989.11.24"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. f4 e6 7. Nf3 Bd6 8. 0-0 0-0 9. Qe1 Nh5 10. Ne5 f6 11. Nxc6 bxc6 12. g4 Nxf4 13. Bxf4 e5 14. Bd2 e4 15. Be2 f5 16. Bf4 Bxf4 17. Rxf4 g5 18. Rxf5 Bxf5 19. gxf5 Rxf5 20. Nd2 e3 21. Nf3 Qf6 22. Ne5 Rf2 23. Ng4 Qe6 24. Nxf2 exf2+ 25. Qxf2 Rf8 26. Qg2 Qe3+ 27. Kh1 Rf2 28. Qg4 Rxe2 29. Rf1 Re1 30. Qc8+ Qe8 31. Qxe8+ Rxe8 32. Rf6 Rc8 33. Kg2 Kg7 34. Rd6 Rc7 35. Kg3 h5 36. h4 g4 37. Kf4 Kh7 38. Kg3 a5 39. b3 Kg7 40. Kf4 Kh7 41. Kg3 Kg7 42. Re6 Kh7 43. Re5 Kg6 44. Re6+ Kh7 45. Rd6 Kg7 46. c4 dxc4 47. bxc4 Kh7 48. c5 Kg8 49. d5 cxd5 50. Rxd5 Rc6 51. Rxh5 Kf7 52. Kxg4 Re6 53. Rf5+ Ke7 54. h5 Re2 55. h6 Rg2+ 56. Kh3 Rg8 57. h7 Rh8 58. Rh5 Kf7 59. Kg4 Kg7 60. a4 Rxh7 61. Rxh7+ Kxh7 1-0

[Event "Pan American-ch U16 7th"]
[Site "Cubatao"]
[Date "1989.11.??"]
[Round "5"]
[White "Mercado, Osvaldo"]
[Black "Rodriguez Vila, Andres"]
[Result "0-1"]
[ECO "C02"]
[PlyCount "84"]
[EventDate "1989.11.24"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. f4 cxd4 6. cxd4 Qb6 7. Nf3 Bd7 8. Be2 Nh6 9. b3 Nf5 10. Bb2 Bb4+ 11. Kf2 Ncxd4 12. Bxd4 Bc5 13. Bxc5 Qxc5+ 14. Ke1 Ne3 15. Qd3 Qc1+ 16. Bd1 Nxg2+ 17. Kf2 Nxf4 18. Qd2 Qc5+ 19. Qd4 Qxd4+ 20. Nxd4 Nd3+ 21. Ke3 Nxe5 22. Nc3 0-0 23. Rc1 Ng6 24. Nf3 Bc6 25. Bc2 d4+ 26. Nxd4 Bxh1 27. Rxh1 Rac8 28. Nde2 Ne7 29. Be4 b6 30. Rd1 Rfd8 31. Rxd8+ Rxd8 32. Nd4 e5 33. Nf3 f6 34. h4 g6 35. Ke2 Kg7 36. Ke3 f5 37. Bb1 Kf6 38. b4 Rc8 39. Kd2 Rc4 40. a3 e4 41. Ng1 Ke5 42. Nge2 f4 0-1

[Event "Pan American-ch U16 7th"]
[Site "Cubatao"]
[Date "1989.11.??"]
[Round "1"]
[White "Souza, Adwilhans Luciano"]
[Black "Mercado, Osvaldo"]
[Result "1-0"]
[ECO "C00"]
[PlyCount "69"]
[EventDate "1989.11.24"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 c5 5. g3 Nc6 6. Bg2 Be7 7. 0-0 0-0 8. c3 Qb6 9. Re1 Bd7 10. e5 Ne8 11. Nf1 f6 12. exf6 Nxf6 13. Ne3 Rae8 14. Bh3 Bd6 15. Qe2 Qd8 16. a4 e5 17. Bg2 Ne7 18. Qc2 Qc8 19. Qb3 Bh3 20. Bh1 h6 21. Bd2 Be6 22. c4 d4 23. Nf1 Nc6 24. Re2 Bf5 25. Be1 e4 26. Nh4 Bh7 27. dxe4 g5 28. Nf3 Bxe4 29. N3d2 Bxh1 30. Rxe8 Rxe8 31. Kxh1 Ne5 32. Kg1 Qc6 33. Qc2 Kg7 34. Rc1 Bc7 35. h3 1-0

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "8"]
[White "Arrua, E."]
[Black "Mercado, Osvaldo"]
[Result "0-1"]
[ECO "D67"]
[PlyCount "70"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. Nc3 c6 4. Nf3 Nf6 5. Bg5 Be7 6. e3 0-0 7. Bd3 Nbd7 8. 0-0 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. Rc1 Rd8 12. a3 b6 13. Bd3 Bb7 14. Qe2 c5 15. Nxd5 exd5 16. dxc5 bxc5 17. Rc3 Nf6 18. Nd2 d4 19. exd4 Qxe2 20. Bxe2 cxd4 21. Rc7 d3 22. Bd1 Bd5 23. Ba4 Rab8 24. b4 Ne4 25. Nxe4 Bxe4 26. f3 Bg6 27. Bd7 Rb6 28. Bc6 a5 29. b5 d2 30. Rd1 Kf8 31. Bd7 Rd6 32. b6 R6xd7 33. Rxd7 Rxd7 34. b7 Rxb7 35. Rxd2 Rb3 0-1

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "6"]
[White "Diaz Quejada, Ricardo"]
[Black "Mercado, Osvaldo"]
[Result "1-0"]
[ECO "D46"]
[PlyCount "65"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. Nc3 c6 4. Nf3 Nf6 5. e3 Bd6 6. Bd3 0-0 7. 0-0 Nbd7 8. Re1 dxc4 9. Bxc4 e5 10. Bd3 Re8 11. Qc2 exd4 12. Nxd4 Ne5 13. Be2 g6 14. b3 a6 15. Bb2 c5 16. Nf3 b5 17. Nxe5 Bxe5 18. Bf3 Ra7 19. Rad1 Rd7 20. Bc6 Qc7 21. Bxd7 Bxd7 22. f4 Bf5 23. Qd2 Ne4 24. Nxe4 Bxb2 25. Nxc5 Ba3 26. Nxa6 Qb6 27. Nb4 Qa5 28. Nd5 Qxd2 29. Rxd2 Kg7 30. h3 Be4 31. Ree2 Bc5 32. Kf2 f5 33. Nc7 1-0

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "4"]
[White "Flores, Rodney"]
[Black "Mercado, Osvaldo"]
[Result "1-0"]
[ECO "D31"]
[PlyCount "49"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bd7 6. e3 b5 7. axb5 cxb5 8. Ne5 Nc6 9. Nxd7 Qxd7 10. Nxb5 Nf6 11. Bxc4 Be7 12. 0-0 0-0 13. Qa4 a5 14. Nc3 Qb7 15. d5 exd5 16. Nxd5 Rfd8 17. Nxe7+ Nxe7 18. Qb3 Qxb3 19. Bxb3 Rab8 20. Ba4 Ne4 21. Rd1 Nc5 22. Bc2 a4 23. Rd4 f5 24. Bxa4 Kf8 25. Ra3 1-0

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "10"]
[White "Martinez, L."]
[Black "Mercado, Osvaldo"]
[Result "1-0"]
[ECO "D60"]
[PlyCount "81"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. Nc3 c6 4. Nf3 Nf6 5. e3 Nbd7 6. Bd3 Be7 7. 0-0 0-0 8. Bd2 dxc4 9. Bxc4 c5 10. Rc1 a6 11. a4 cxd4 12. exd4 Nb6 13. Ba2 Nbd5 14. Bg5 Nb4 15. Bb1 Nfd5 16. Nxd5 Nxd5 17. Qc2 g6 18. Bxe7 Qxe7 19. Qd2 Kg7 20. Rfe1 Rd8 21. Ne5 Qd6 22. Ng4 Qf4 23. Qxf4 Nxf4 24. g3 Nd5 25. Ne5 Bd7 26. a5 Be8 27. Be4 Rab8 28. Red1 f6 29. Nd3 Bc6 30. Nc5 Kf7 31. Nxa6 Ra8 32. Bxd5 Bxd5 33. Nc7 Rxa5 34. Nxd5 Raxd5 35. f4 Ke7 36. Kf2 Rf8 37. Ra1 h6 38. Ke3 g5 39. Rd2 f5 40. b4 Kf6 41. Ra5 1-0

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "12"]
[White "Mercado, Osvaldo"]
[Black "Acevedo, Victor"]
[Result "0-1"]
[ECO "B54"]
[PlyCount "194"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Nc6 5. d4 cxd4 6. Nxd4 Qc7 7. Be2 Nf6 8. 0-0 d6 9. Be3 Be7 10. f4 0-0 11. Bf3 Bd7 12. Nxc6 Bxc6 13. b3 Rac8 14. Rc1 Qb8 15. a4 Rfd8 16. Qe1 b5 17. axb5 axb5 18. Qe2 b4 19. Na2 Nxe4 20. Bxe4 Bxe4 21. Bd4 f5 22. Qe1 Qb7 23. Qxb4 Qxb4 24. Nxb4 Rb8 25. Bc3 Bf6 26. Bd2 Bd4+ 27. Kh1 Bc5 28. Na6 Rxb3 29. Nxc5 dxc5 30. Rf2 Rd4 31. Kg1 Rb1 32. Rxb1 Bxb1 33. Kf1 Rxc4 34. Ke1 Re4+ 35. Re2 Ra4 36. Rxe6 c4 37. Re8+ Kf7 38. Rc8 Bd3 39. Kf2 Ra7 40. Ke3 h6 41. Bc3 g5 42. Rb8 Ra2 43. Bb2 Kg6 44. Rb6+ Kf7 45. g3 g4 46. Kd4 h5 47. Ke3 Ke8 48. Kd4 Kd7 49. Kc3 Ra8 50. Kd2 Ra2 51. Kc3 Ra5 52. Kd2 Kc7 53. Rh6 Ra2 54. Kc3 Ra5 55. Rxh5 Rb5 56. Bc1 Kc6 57. Kd4 Rd5+ 58. Kc3 Kb5 59. Rh8 Bf1 60. Rb8+ Kc6 61. Re8 Rd3+ 62. Kc2 Rf3 63. Rd8 Bd3+ 64. Kc3 Rf2 65. Bd2 Rxh2 66. Re8 Be4 67. Rc8+ Kd5 68. Rd8+ Kc5 69. Be3+ Kb5 70. Rb8+ Ka6 71. Rb2 Rh3 72. Bf2 Bd3 73. Rb8 Rh7 74. Rb2 Rd7 75. Bd4 Rh7 76. Bf2 Rh1 77. Be3 Re1 78. Kd4 Bf1 79. Bf2 Rd1+ 80. Kc3 Rc1+ 81. Rc2 Ra1 82. Rb2 Ra3+ 83. Kd4 Rd3+ 84. Kxc4 Rxg3+ 85. Kd4 Rf3 86. Ke5 Bd3 87. Bd4 Be4 88. Rb6+ Ka5 89. Rg6 Kb4 90. Rxg4 fxg4 91. Kxe4 Rf1 92. f5 g3 93. f6 Kc4 94. Be5 g2 95. Bd4 Re1+ 96. Kf3 Kxd4 97. Kxg2 Re6 0-1

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "14"]
[White "Mercado, Osvaldo"]
[Black "Gamarra Caceres, Carlos"]
[Result "0-1"]
[ECO "B97"]
[BlackElo "2300"]
[PlyCount "82"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 8. Qd2 Qxb2 9. Rb1 Qa3 10. Be2 Nc6 11. Nb3 Be7 12. 0-0 0-0 13. f5 b5 14. fxe6 Bxe6 15. Bd3 Ne5 16. Kh1 Rac8 17. Qe1 Bxb3 18. Rxb3 Qc5 19. Be3 Qc7 20. Bd4 Rfe8 21. a4 bxa4 22. Nxa4 Nxd3 23. cxd3 Qc2 24. Qb1 Nd7 25. Nb6 Nxb6 26. Rxb6 a5 27. Qa1 Bf8 28. Rd1 a4 29. Rb2 Qc6 30. Qa2 Ra8 31. Rc2 Qd7 32. Rf2 Qe6 33. Ra1 a3 34. h3 Reb8 35. Qc2 d5 36. exd5 Qxd5 37. Bc3 Rc8 38. d4 Bb4 39. Rf3 Qc4 40. Rc1 a2 41. Qb2 Ba3 0-1

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "11"]
[White "Mercado, Osvaldo"]
[Black "Garcia, Alfredo"]
[Result "0-1"]
[ECO "B31"]
[PlyCount "48"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. 0-0 Bg7 5. c3 Nf6 6. e5 Nd5 7. d4 cxd4 8. cxd4 Nc7 9. a4 a6 10. Bc4 d5 11. Be2 Bg4 12. Nc3 0-0 13. h3 Bxf3 14. Bxf3 e6 15. Bf4 f6 16. exf6 Bxf6 17. Be3 Qd6 18. Qd2 Ne8 19. Ne2 Ng7 20. g4 Bxd4 21. Bxd5 Bxe3 22. Bxe6+ Qxe6 23. fxe3 Rae8 24. Rxf8+ Kxf8 0-1

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "5"]
[White "Mercado, Osvaldo"]
[Black "Gonzalez, A."]
[Result "1-0"]
[ECO "C05"]
[PlyCount "85"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Ng8 5. Bd3 c5 6. c3 Nc6 7. Ne2 Bd7 8. 0-0 Qc7 9. f4 c4 10. Bc2 g6 11. g4 Nge7 12. Ng3 0-0-0 13. f5 Bh6 14. Nxc4 dxc4 15. Bxh6 gxf5 16. gxf5 Nxf5 17. Nxf5 exf5 18. Bxf5 Nxe5 19. Bxd7+ Qxd7 20. dxe5 Rhg8+ 21. Kh1 Qc6+ 22. Qf3 Qxh6 23. Qxf7 Qc6+ 24. Qf3 Qe6 25. Qf5 Qxf5 26. Rxf5 Rd2 27. Rg1 Rxg1+ 28. Kxg1 Rxb2 29. e6 Rxa2 30. Rf8+ Kc7 31. e7 Re2 32. e8Q Rxe8 33. Rxe8 b5 34. Re7+ Kb6 35. Rxh7 a5 36. Kf2 a4 37. Ke3 a3 38. Rg7 Ka5 39. Rg1 Ka4 40. Kd2 b4 41. cxb4 Kxb4 42. Kc2 c3 43. Rg4+ 1-0

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "1"]
[White "Mercado, Osvaldo"]
[Black "Riline Orso, Alejandro"]
[Result "0-1"]
[ECO "B41"]
[PlyCount "73"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Bb4 7. Bd3 Nc6 8. Nxc6 dxc6 9. e5 Nd7 10. f4 Nc5 11. Bc2 Qxd1+ 12. Kxd1 Bxc3 13. bxc3 b6 14. Rb1 Nd7 15. Be4 Bb7 16. Be3 0-0-0 17. Kc2 c5 18. Bd3 g5 19. Rhf1 gxf4 20. Bxf4 Bxg2 21. Rf2 Bc6 22. Bg3 Ba4+ 23. Kd2 Rhf8 24. Ke2 h6 25. Rbf1 Rg8 26. Ke3 Rg5 27. Bf4 Rh5 28. Be2 Rh3+ 29. Rf3 Rxf3+ 30. Rxf3 Bc2 31. Rh3 Rh8 32. Bd3 Bxd3 33. Kxd3 h5 34. Ke4 b5 35. cxb5 axb5 36. a3 Nb6 37. Be3 0-1

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "9"]
[White "Mercado, Osvaldo"]
[Black "Santacruz, Francisco"]
[Result "0-1"]
[ECO "B82"]
[BlackElo "2315"]
[PlyCount "88"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. f4 Be7 7. Be3 0-0 8. Qf3 a6 9. 0-0-0 Qc7 10. g4 Nc6 11. g5 Nd7 12. Bh3 Nxd4 13. Bxd4 b5 14. Rhe1 b4 15. Na4 Bb7 16. f5 Bxg5+ 17. Kb1 e5 18. Qg2 Bf6 19. Bf2 Bc6 20. b3 Bxa4 21. bxa4 Nb8 22. Rg1 Rc8 23. Bh4 Kf8 24. Bxf6 gxf6 25. Rxd6 Qxd6 26. Qg8+ Ke7 27. Qxc8 Qc6 28. Rg8 Qxc8 29. Rxc8 Kd7 30. Rh8 Kc7 31. Bf1 Ra7 32. Rxh7 Kd6 33. Bc4 Rc7 34. Bd5 Rc3 35. Rxf7 Nd7 36. Be6 Nc5 37. Bd5 Nd7 38. Rh7 Rf3 39. Rh6 Kc5 40. h4 Kd4 41. Kc1 Nc5 42. Rxf6 Nxa4 43. Rd6 Rf1+ 44. Kd2 Nc3 0-1

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "16"]
[White "Mercado, Osvaldo"]
[Black "Sosa Harrison, Jorge"]
[Result "0-1"]
[ECO "B40"]
[PlyCount "57"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. e5 Nd5 7. Bd2 Nxc3 8. bxc3 Be7 9. Bd3 Nc6 10. Nxc6 bxc6 11. 0-0 d6 12. Qg4 g6 13. Bf4 0-0 14. Qg3 d5 15. Bh6 Re8 16. f4 Bc5+ 17. Kh1 f5 18. exf6 Qxf6 19. Rf3 Bd6 20. Raf1 Rb8 21. h4 Rb2 22. h5 Kf7 23. Bg5 Qg7 24. Qh4 Rg8 25. g4 Ke8 26. f5 gxf5 27. gxf5 Qxg5 28. Qxg5 Rxg5 29. f6 0-1

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "7"]
[White "Mercado, Osvaldo"]
[Black "Ucedo, Ricardo"]
[Result "1-0"]
[ECO "C01"]
[PlyCount "55"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 Nc6 2. d4 e6 3. Nf3 Bb4+ 4. c3 Ba5 5. Bd3 Nge7 6. 0-0 0-0 7. Re1 f5 8. exf5 Nxf5 9. Bg5 Qe8 10. d5 Nd8 11. dxe6 Nxe6 12. Re5 Qh5 13. Bxf5 Nxg5 14. Bxh7+ Kh8 15. Rxg5 Qxh7 16. Rxa5 d6 17. Ra4 Qg6 18. Rh4+ Kg8 19. Nbd2 Be6 20. Nd4 Bd5 21. Qg4 Qf6 22. N2f3 c5 23. Qh5 Be4 24. Rxe4 cxd4 25. Qd5+ Qf7 26. Rxd4 Rac8 27. Qxf7+ Rxf7 28. Rxd6 1-0

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "15"]
[White "Peralta, Eduardo"]
[Black "Mercado, Osvaldo"]
[Result "1/2-1/2"]
[ECO "A12"]
[PlyCount "62"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 c6 4. 0-0 Bf5 5. b3 e6 6. Bb2 h6 7. d3 Nbd7 8. Nbd2 Be7 9. c4 0-0 10. Rc1 Rc8 11. Re1 Bh7 12. a3 a5 13. Qc2 b5 14. cxb5 cxb5 15. Qxc8 Qxc8 16. Rxc8 Rxc8 17. Rc1 Rxc1+ 18. Bxc1 e5 19. Bb2 Bd6 20. d4 e4 21. Ne5 b4 22. Nxd7 Nxd7 23. a4 f5 24. e3 g5 25. Bf1 Nf6 26. Bb5 f4 27. Nf1 h5 28. exf4 gxf4 29. Bc1 fxg3 30. hxg3 Kg7 31. Ne3 Kg6 1/2-1/2

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "2"]
[White "Riego Prieto, Victorio"]
[Black "Mercado, Osvaldo"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "2245"]
[PlyCount "51"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3 Bd7 7. dxc5 Bxc5 8. 0-0 f6 9. b4 Be7 10. Re1 fxe5 11. Nxe5 Nxe5 12. Rxe5 Nf6 13. Be3 Qc7 14. Rg5 0-0 15. Bd4 h6 16. Rg6 e5 17. Be3 Kh8 18. Qd2 Rf7 19. Na3 a6 20. Rd1 Rc8 21. Nb1 Bg4 22. f3 Bh5 23. Rg3 Bd6 24. Bf5 Rcf8 25. Rh3 e4 26. g4 1-0

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "17"]
[White "Santacruz, Cesar S"]
[Black "Mercado, Osvaldo"]
[Result "1-0"]
[ECO "A29"]
[WhiteElo "2255"]
[PlyCount "53"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. 0-0 Be7 8. d3 0-0 9. Ne4 h6 10. Bd2 f5 11. Nc3 Be6 12. Qb1 a6 13. Rd1 Qe8 14. b4 Bf6 15. a4 Qh5 16. a5 Nd5 17. Na4 Rad8 18. Nc5 Bc8 19. Ra3 Kh8 20. Qb3 Na7 21. Ra2 g5 22. Nxe5 c6 23. d4 Nb5 24. Be1 Nxd4 25. Rxd4 Bxe5 26. Rd3 Qf7 27. Rad2 1-0

[Event "PAR-ch"]
[Site "Asuncion"]
[Date "1989.??.??"]
[Round "13"]
[White "Valiente, Cristobal"]
[Black "Mercado, Osvaldo"]
[Result "1-0"]
[ECO "A27"]
[WhiteElo "2310"]
[PlyCount "37"]
[EventDate "1989.??.??"]
[EventType "tourn"]
[EventRounds "17"]
[EventCountry "PAR"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nc6 3. Nf3 g6 4. Rb1 a5 5. d4 exd4 6. Nxd4 Bg7 7. Ndb5 Nge7 8. g3 0-0 9. Bg2 d6 10. 0-0 Bd7 11. b3 Rc8 12. Bb2 f5 13. Qd2 h6 14. Rbd1 Kh7 15. c5 Be6 16. cxd6 cxd6 17. Nxd6 Rc7 18. Qe3 Bd7 19. Rd2 1-0

