[Event "Africa-ch U16 Girls"]
[Site "Windhoek"]
[Date "2019.12.21"]
[Round "9.3"]
[White "Steyn, Joharina"]
[Black "Da Costa, Olga"]
[Result "0-1"]
[ECO "A07"]
[BlackElo "1402"]
[PlyCount "60"]
[EventDate "2019.12.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NAM"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. Nf3 Nc6 2. g3 e5 3. d3 d5 4. Bg2 Nf6 5. 0-0 Be6 6. Nbd2 h6 7. c3 Qc8 8. Qc2 Bc5 9. d4 exd4 10. cxd4 Bxd4 11. Nxd4 Nxd4 12. Qd3 Nc6 13. e4 d4 14. Re1 0-0 15. Nf3 Rd8 16. Bf4 Nb4 17. Qd2 c5 18. a3 Nc6 19. b4 b6 20. bxc5 bxc5 21. Ne5 Qa6 22. Qe2 Qxe2 23. Rxe2 Nxe5 24. Bxe5 d3 25. Bxf6 gxf6 26. e5 dxe2 27. Bxa8 Rd1+ 28. Rxd1 exd1Q+ 29. Kg2 Bd5+ 30. Kh3 Qh5# 0-1

[Event "Africa-ch U16 Girls"]
[Site "Windhoek"]
[Date "2019.12.20"]
[Round "8.3"]
[White "Da Costa, Olga"]
[Black "Mboya, Audrey Tracy"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "1402"]
[BlackElo "1327"]
[PlyCount "46"]
[EventDate "2019.12.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NAM"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 Nxd4 4. Nxd4 exd4 5. Qxd4 d6 6. Bc4 Qf6 7. Qd3 Be6 8. Nc3 Ne7 9. Be3 c5 10. Bb5+ Nc6 11. 0-0 Qd8 12. Rfd1 Be7 13. Nd5 0-0 14. Bxc6 bxc6 15. Nxe7+ Qxe7 16. Qxd6 Qf6 17. e5 Qg6 18. Qxc5 Bh3 19. g3 Qe4 20. f3 Qxf3 21. Rd2 Rad8 22. Rad1 Rxd2 23. Rxd2 Qf1# 0-1

[Event "Africa-ch U16 Girls"]
[Site "Windhoek"]
[Date "2019.12.20"]
[Round "7.2"]
[White "Da Costa, Olga"]
[Black "Otisitswe, Ruth"]
[Result "1-0"]
[ECO "B27"]
[WhiteElo "1402"]
[BlackElo "1634"]
[PlyCount "27"]
[EventDate "2019.12.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NAM"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. Bc4 Qc7 6. Bb3 Qe5 7. Be3 Qxe4 8. 0-0 a6 9. Nc3 Qe5 10. Qf3 e6 11. Rad1 Qf6 12. Qg3 Nc6 13. Nxc6 bxc6 14. Bd4 1-0

[Event "Africa-ch U16 Girls"]
[Site "Windhoek"]
[Date "2019.12.19"]
[Round "6.2"]
[White "Gaoses, Nazneen Aline"]
[Black "Da Costa, Olga"]
[Result "0-1"]
[ECO "D02"]
[BlackElo "1402"]
[PlyCount "78"]
[EventDate "2019.12.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NAM"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. Bf4 e6 3. Nf3 d5 4. e3 c5 5. c3 Be7 6. Nbd2 Bd7 7. Qc2 Nc6 8. Be2 Qb6 9. 0-0 Rc8 10. Rfe1 Nh5 11. Ne5 Nxf4 12. exf4 cxd4 13. Nxd7 Kxd7 14. Rab1 Qc7 15. f5 dxc3 16. fxe6+ fxe6 17. Qxc3 Bf6 18. Qe3 Bd4 19. Qh3 Rce8 20. Bg4 Qd6 21. Nf3 Be5 22. Ng5 Nd8 23. g3 h6 24. Bh5 Ref8 25. Ne4 dxe4 26. Rbd1 Bd4 27. Rd2 Qb6 28. Rxd4+ Kc7 29. Rc4+ Kb8 30. Rc2 Rf6 31. g4 Nc6 32. Qg3+ e5 33. g5 Rff8 34. Bg6 Rf4 35. Kh1 Nd4 36. Rd2 Nf3 37. Rd5 Nxh2 38. Kg2 Nf3 39. Re3 Nxg5 0-1

[Event "Africa-ch U16 Girls"]
[Site "Windhoek"]
[Date "2019.12.19"]
[Round "5.3"]
[White "Ramarolafy, Grace Gloria"]
[Black "Da Costa, Olga"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "1186"]
[BlackElo "1402"]
[PlyCount "122"]
[EventDate "2019.12.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NAM"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Nf3 Bf5 5. d4 Nf6 6. Bd3 e6 7. 0-0 Bg4 8. h3 Bh5 9. Bf4 Bb4 10. Ne4 Nd5 11. Bh2 Nd7 12. c3 Be7 13. c4 N5f6 14. a3 c6 15. b4 Qd8 16. Re1 0-0 17. Nd6 Bxd6 18. Bxd6 Re8 19. g4 Bg6 20. Bxg6 hxg6 21. Ng5 Nh7 22. Nxh7 Kxh7 23. Qf3 Nf6 24. Be5 g5 25. Bxf6 gxf6 26. Qe4+ Kg7 27. f4 Rh8 28. Kg2 Qd6 29. fxg5 fxg5 30. Qe5+ Qxe5 31. dxe5 Rad8 32. Rad1 Rhe8 33. Kg3 Kg6 34. Rf1 b5 35. c5 Rd5 36. Rfe1 Red8 37. Rxd5 Rxd5 38. Re3 Rd4 39. Kf2 f6 40. Ke2 f5 41. gxf5+ Kxf5 42. Kf3 Rd5 43. Kg3 Rxe5 44. Rxe5+ Kxe5 45. Kg4 Kf6 46. Kf3 Kf5 47. Ke3 e5 48. Kf3 e4+ 49. Ke3 Ke5 50. Ke2 Kd4 51. Kd2 Ke5 52. Ke3 Kf5 53. Ke2 Kf4 54. Kf2 e3+ 55. Ke2 Kg3 56. h4 gxh4 57. Kxe3 h3 58. Ke2 h2 59. Kf1 h1Q+ 60. Ke2 Qe4+ 61. Kf1 Qc2 0-1

[Event "Africa-ch U16 Girls"]
[Site "Windhoek"]
[Date "2019.12.17"]
[Round "3.2"]
[White "Boubendir, Nesrine"]
[Black "Da Costa, Olga"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "1521"]
[BlackElo "1402"]
[PlyCount "77"]
[EventDate "2019.12.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NAM"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Bf5 5. Bd2 c6 6. Nf3 e6 7. Bc4 Nd7 8. 0-0 Ngf6 9. Re1 Bb4 10. h3 0-0 11. Nh4 h6 12. Nxf5 Qxf5 13. Bd3 Qa5 14. Qf3 Nd5 15. Nxd5 Bxd2 16. Qe4 g6 17. Ne7+ Kh8 18. Nxg6+ fxg6 19. Qxg6 Nf6 20. Rxe6 Qg5 21. Rxf6 Qxg6 22. Rxf8+ Rxf8 23. Bxg6 Kg7 24. Be4 Re8 25. Bd3 b6 26. Rd1 Bg5 27. Kf1 Re7 28. Re1 Rxe1+ 29. Kxe1 Bc1 30. b3 Bb2 31. Be4 Bxd4 32. Bxc6 Bf6 33. Ke2 Kg6 34. g3 a6 35. a4 Be5 36. Kf3 Kf6 37. h4 Bd4 38. g4 a5 39. Kg3 1-0

[Event "Africa-ch U16 Girls"]
[Site "Windhoek"]
[Date "2019.12.17"]
[Round "4.1"]
[White "Da Costa, Olga"]
[Black "Nassr, Lina"]
[Result "0-1"]
[ECO "B45"]
[WhiteElo "1402"]
[BlackElo "1944"]
[PlyCount "66"]
[EventDate "2019.12.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NAM"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be3 Bb4 7. Bd3 d5 8. f3 e5 9. Nxc6 bxc6 10. Bd2 0-0 11. 0-0 Bc5+ 12. Kh1 Bd4 13. Rb1 a6 14. Qe1 Be6 15. a3 Nd7 16. Qg3 Bc5 17. f4 exf4 18. Bxf4 Re8 19. e5 Bf8 20. h4 Nc5 21. Bg5 Qd7 22. Bf6 Nxd3 23. cxd3 h6 24. Ne2 Ra7 25. Nf4 Bf5 26. Nh5 g6 27. Nf4 Bg7 28. Nh5 Bf8 29. Bg5 gxh5 30. Be3+ Bg7 31. Rbd1 Bg4 32. d4 Be2 33. Bxh6 f6 0-1

[Event "Africa-ch U16 Girls"]
[Site "Windhoek"]
[Date "2019.12.16"]
[Round "1.3"]
[White "Da Costa, Olga"]
[Black "Hamssadhwane, Sivakumar"]
[Result "1-0"]
[ECO "C62"]
[WhiteElo "1402"]
[PlyCount "109"]
[EventDate "2019.12.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NAM"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 d6 4. Bb5 Bd7 5. Nc3 f6 6. Be3 Nce7 7. Bc4 Qc8 8. h3 c6 9. Nh4 g6 10. f4 Qc7 11. f5 0-0-0 12. dxe5 dxe5 13. Qe2 Qa5 14. a3 b5 15. b4 Qa6 16. Bd3 Qb7 17. a4 a6 18. a5 gxf5 19. Nxf5 Nxf5 20. exf5 Bxb4 21. Bd2 Ne7 22. Qg4 Nd5 23. Ne4 Bxd2+ 24. Kxd2 Rdg8 25. Nd6+ Kb8 26. Nxb7 Rxg4 27. hxg4 Kxb7 28. Rab1 Nf4 29. Be4 Nd5 30. c4 Nc7 31. Rh6 Ne8 32. cxb5 axb5 33. Rxb5+ Ka6 34. Bxc6 Bxc6 35. Rb6+ Kxa5 36. Rxc6 Kb5 37. Re6 Kc5 38. Ke3 Kd5 39. Re7 Nd6 40. Rd7 Kc6 41. Rhxh7 Rxh7 42. Rxh7 Nc4+ 43. Kf2 Kd5 44. Rh6 Ke4 45. Rxf6 Kf4 46. Rg6 e4 47. f6 e3+ 48. Ke2 Ne5 49. Rg7 Kg3 50. f7 Nxf7 51. Rxf7 Kxg4 52. Rg7+ Kf4 53. g3+ Kf5 54. Kxe3 Kf6 55. Rb7 1-0

[Event "Africa-ch U16 Girls"]
[Site "Windhoek"]
[Date "2019.12.16"]
[Round "2.3"]
[White "Van Wyk, Keisha C"]
[Black "Da Costa, Olga"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "1135"]
[BlackElo "1402"]
[PlyCount "74"]
[EventDate "2019.12.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NAM"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Nf3 Bf5 5. d4 c6 6. Be2 Nf6 7. 0-0 e6 8. Bf4 Bb4 9. Nb1 Nd5 10. Bd2 Bxd2 11. Nbxd2 Nf4 12. Bc4 Nd7 13. Re1 0-0 14. c3 Bg4 15. Qc2 Qh5 16. Bf1 Bf5 17. Qd1 Qg4 18. Kh1 Nf6 19. Ne5 Qxd1 20. Raxd1 N6d5 21. Ndf3 f6 22. Nd3 Bg4 23. Nxf4 Nxf4 24. h3 Nxh3 25. Rd2 Nf4 26. Nh2 Bh5 27. Re3 Bf7 28. Rg3 Rad8 29. Ng4 Ng6 30. Rdd3 e5 31. a3 Bc4 32. Rd1 Bxf1 33. Rxf1 exd4 34. cxd4 Rxd4 35. Rb1 Rfd8 36. Ne3 Rh4+ 37. Kg1 Nf4 0-1

