[Event "Pan American-ch U12 Girls"]
[Site "Mar del Plata"]
[Date "2009.08.20"]
[Round "8"]
[White "Da Costa, Maria"]
[Black "Aponte Montes de Oca, Oriana Isabel"]
[Result "0-1"]
[ECO "E12"]
[PlyCount "54"]
[EventDate "2009.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 Be7 6. d5 0-0 7. e4 d6 8. Bd3 c6 9. dxc6 Nxc6 10. 0-0 Qc7 11. Qc2 Rac8 12. h3 h6 13. Rd1 Na5 14. Nb5 Qb8 15. Qe2 Nb3 16. Rb1 Nc5 17. Nc3 Nxd3 18. Qxd3 Qa8 19. Nd2 Nd7 20. Re1 Ne5 21. Qg3 Ng6 22. Nb5 Rfd8 23. Nd4 Bg5 24. N4f3 Bf4 25. Qg4 Rc5 26. h4 h5 27. Qh3 d5 0-1

[Event "Pan American-ch U12 Girls"]
[Site "Mar del Plata"]
[Date "2009.08.20"]
[Round "7"]
[White "Da Costa, Maria"]
[Black "Felix Vega, Aurora Edith"]
[Result "1-0"]
[ECO "E76"]
[PlyCount "69"]
[EventDate "2009.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 c5 6. d5 0-0 7. Nf3 e6 8. dxe6 Bxe6 9. Bd3 Re8 10. 0-0 Bg4 11. h3 Bxf3 12. Qxf3 Nc6 13. Kh1 Qe7 14. Nd5 Nxd5 15. cxd5 Nb4 16. Bb1 c4 17. Rd1 Na6 18. Qe2 Rac8 19. Be3 c3 20. Bd4 Bxd4 21. Rxd4 Qf6 22. bxc3 Rxc3 23. Rd1 Rxh3+ 24. gxh3 Qxa1 25. Bd3 Qc3 26. Qg2 Nc5 27. Bb1 Qe3 28. e5 Qxf4 29. e6 fxe6 30. Rf1 Qd4 31. Bxg6 Rd8 32. Bf7+ Kh8 33. dxe6 Qe5 34. Rg1 h6 35. e7 1-0

[Event "Pan American-ch U12 Girls"]
[Site "Mar del Plata"]
[Date "2009.08.20"]
[Round "8"]
[White "Paredes Bustamante, Paula Elizabeth"]
[Black "Da Costa, Maria"]
[Result "1-0"]
[ECO "B21"]
[PlyCount "69"]
[EventDate "2009.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. c3 d3 5. Bxd3 d6 6. 0-0 g6 7. Bf4 Bg7 8. Qe2 Nf6 9. Rd1 0-0 10. Na3 a6 11. Bc2 Nh5 12. Be3 b5 13. Bb3 Qc7 14. Rac1 Bb7 15. Nd2 Nf6 16. f4 Rad8 17. c4 b4 18. Nc2 Nd7 19. Rb1 a5 20. a3 Nc5 21. Bxc5 dxc5 22. axb4 axb4 23. e5 Na5 24. Ba4 Nc6 25. Bxc6 Qxc6 26. Ne3 e6 27. Nb3 Ra8 28. Rd6 Qe4 29. Rf1 Ra2 30. Nxc5 Rxb2 31. Qxb2 Qxe3+ 32. Qf2 Qxf2+ 33. Rxf2 Ba8 34. Rfd2 b3 35. Nxb3 1-0

[Event "Pan American-ch U12 Girls"]
[Site "Mar del Plata"]
[Date "2009.08.19"]
[Round "5"]
[White "Da Costa, Maria"]
[Black "Rosales, Pierina"]
[Result "0-1"]
[ECO "D13"]
[PlyCount "122"]
[EventDate "2009.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. Bf4 Nc6 6. e3 a6 7. Nf3 Bg4 8. Be2 e6 9. h3 Bh5 10. 0-0 Bd6 11. Bxd6 Qxd6 12. Rc1 0-0 13. Nd2 Bxe2 14. Qxe2 Rac8 15. f4 Rfe8 16. g4 Nd7 17. Qg2 Qb4 18. Nf3 Na5 19. Qf2 Nc4 20. Rc2 b5 21. a3 Qa5 22. Na2 Nf6 23. Ne5 Ne4 24. Nxc4 Rxc4 25. Qg2 Rec8 26. Rxc4 Rxc4 27. Nb4 Qb6 28. f5 Rc7 29. fxe6 Qxe6 30. Qh2 Rc8 31. Qf4 f6 32. Qf5 Qxf5 33. Rxf5 Rc1+ 34. Kg2 Re1 35. Nxd5 Rb1 36. Nc7 Rxb2+ 37. Kg1 Rb3 38. Nxa6 Rxa3 39. Nb4 Rxe3 40. Rxb5 Rxh3 41. d5 Rg3+ 42. Kf1 Rxg4 43. Rb8+ Kf7 44. Nc6 h5 45. Nd8+ Ke7 46. Nc6+ Kd6 47. Rd8+ Kc5 48. Ne7 Rg5 49. Rh8 Kd6 50. Nc8+ Kxd5 51. Ne7+ Ke6 52. Nc6 Kf5 53. Nd4+ Kg4 54. Nc2 Kg3 55. Nd4 h4 56. Ne2+ Kg4 57. Ng1 f5 58. Rh7 f4 59. Rh8 f3 60. Rf8 Nf6 61. Rh8 Ra5 0-1

[Event "Pan American-ch U12 Girls"]
[Site "Mar del Plata"]
[Date "2009.08.19"]
[Round "6"]
[White "Vera Osorio, Francisca"]
[Black "Da Costa, Maria"]
[Result "0-1"]
[ECO "B33"]
[PlyCount "100"]
[EventDate "2009.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf3 Bb4 7. Bd2 Bxc3 8. Bxc3 Nxe4 9. Bxe5 Nxe5 10. Nxe5 Qa5+ 11. c3 Qxe5 12. Qe2 Qe6 13. f3 Nf6 14. Qxe6+ dxe6 15. 0-0-0 Bd7 16. Bc4 Rc8 17. Bb3 Bc6 18. Rd2 0-0 19. Re1 h6 20. Red1 Nd5 21. Re1 Nb6 22. Kc2 Rfd8 23. Red1 Rxd2+ 24. Rxd2 Bd5 25. Bxd5 Nxd5 26. Re2 b5 27. a3 a5 28. Kb3 a4+ 29. Kc2 b4 30. axb4 Nxb4+ 31. Kd2 Nd5 32. g3 a3 33. bxa3 Rxc3 34. f4 Rxa3 35. Ke1 Re3 36. Rxe3 Nxe3 37. Ke2 Nd5 38. Kd3 Kh7 39. Ke4 Nf6+ 40. Kf3 g5 41. Ke3 Ng4+ 42. Ke2 Nxh2 43. fxg5 hxg5 44. Kf2 f5 45. Kg2 Ng4 46. Kf3 Kg6 47. Kg2 e5 48. Kf3 f4 49. Ke2 Kf6 50. Kf1 Kf5 0-1

[Event "Pan American-ch U12 Girls"]
[Site "Mar del Plata"]
[Date "2009.08.18"]
[Round "4"]
[White "Da Costa, Maria"]
[Black "Paspuel Rodriguez, Melissa"]
[Result "1/2-1/2"]
[ECO "D61"]
[BlackElo "1656"]
[PlyCount "89"]
[EventDate "2009.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. Bg5 Be7 6. e3 Nbd7 7. Qc2 h6 8. Bh4 0-0 9. Bd3 dxc4 10. Bxc4 Nd5 11. Bxe7 Qxe7 12. 0-0 Re8 13. a3 Nxc3 14. Qxc3 e5 15. dxe5 Nxe5 16. Nxe5 Qxe5 17. Qxe5 Rxe5 18. Rfd1 Bf5 19. h3 h5 20. Rd2 Kf8 21. Rad1 f6 22. Rd8+ Rxd8 23. Rxd8+ Re8 24. Rxe8+ Kxe8 25. f3 Ke7 26. Kf2 b5 27. Be2 a5 28. e4 Be6 29. Ke3 Kd6 30. f4 Bf7 31. h4 Kc5 32. g4 hxg4 33. Bxg4 Kd6 34. Be2 Kc5 35. Bg4 b4 36. axb4+ axb4 37. Be2 Kb6 38. e5 f5 39. Bd3 Be6 40. Bc2 g6 41. b3 c5 42. Bd1 c4 43. bxc4 Bxc4 44. Kd4 Be6 45. Ba4 1/2-1/2

[Event "Pan American-ch U12 Girls"]
[Site "Mar del Plata"]
[Date "2009.08.17"]
[Round "2"]
[White "Denon, Nicole"]
[Black "Da Costa, Maria"]
[Result "0-1"]
[ECO "B33"]
[WhiteElo "1553"]
[PlyCount "58"]
[EventDate "2009.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Be2 Nd4 11. Nxf6+ Bxf6 12. Bxf6 Qxf6 13. c3 Nxe2 14. Qxe2 0-0 15. 0-0 Qg6 16. Nc2 f5 17. f3 Be6 18. b3 f4 19. Rfd1 Bd7 20. Nb4 Kh8 21. Nd5 Qh6 22. Qd3 Rad8 23. Rac1 g5 24. Qe2 Qg7 25. c4 g4 26. Nc7 gxf3 27. Qf2 Rf6 28. Kh1 fxg2+ 29. Qxg2 Rg6 0-1

[Event "Pan American-ch U12 Girls"]
[Site "Mar del Plata"]
[Date "2009.08.17"]
[Round "3"]
[White "Romero, Daniela"]
[Black "Da Costa, Maria"]
[Result "1/2-1/2"]
[ECO "C10"]
[WhiteElo "2080"]
[PlyCount "94"]
[EventDate "2009.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. Bc4 Be7 8. 0-0 0-0 9. Bf4 b6 10. c3 Bb7 11. Qe2 Nd5 12. Bg3 c5 13. Rad1 Qc8 14. Bd3 Bf6 15. dxc5 bxc5 16. Qc2 h6 17. Rfe1 Rd8 18. Be4 Bc6 19. Be5 Be7 20. a3 a5 21. c4 Nf6 22. Rxd8+ Bxd8 23. Bxc6 Qxc6 24. Rd1 Be7 25. h3 Nd7 26. Bc3 Bf6 27. Bxf6 Nxf6 28. Ne5 Qc7 29. Qe2 Rb8 30. Nd3 Rd8 31. Ne1 Rxd1 32. Qxd1 Qd7 33. Qxd7 Nxd7 34. Nd3 f6 35. Kf1 Kf7 36. Ke2 Ke7 37. Kd2 Kd6 38. Kc3 e5 39. f3 f5 40. b4 axb4+ 41. axb4 cxb4+ 42. Kxb4 e4 43. fxe4 fxe4 44. Nf4 e3 45. Kc3 Ke5 46. Nd3+ Ke4 47. c5 Kd5 1/2-1/2

[Event "Pan American-ch U12 Girls"]
[Site "Mar del Plata"]
[Date "2009.08.16"]
[Round "1"]
[White "Da Costa, Maria"]
[Black "Renteria Valencia, Helen Manuela"]
[Result "1-0"]
[ECO "A84"]
[BlackElo "1943"]
[PlyCount "45"]
[EventDate "2009.08.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 f5 5. Bg5 Be7 6. Bxe7 Qxe7 7. e3 Nf6 8. Bd3 Nbd7 9. cxd5 cxd5 10. 0-0 0-0 11. Rc1 b6 12. Nb5 Ba6 13. Nc7 Bxd3 14. Qxd3 Rac8 15. Ng5 Ng4 16. f4 e5 17. Nxd5 Qd6 18. Qb3 Kh8 19. Rxc8 Nh6 20. Rxf8+ Nxf8 21. fxe5 Qd8 22. Rxf5 Qc8 23. Rf1 1-0

