[Event "Scarborough CC-ch"]
[Site "Toronto"]
[Date "2019.05.02"]
[Round "5.4"]
[White "Mao, Fengxi"]
[Black "De Costa, Alex"]
[Result "1-0"]
[ECO "B42"]
[WhiteElo "2098"]
[BlackElo "1787"]
[PlyCount "57"]
[EventDate "2019.04.04"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "CAN"]
[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 a6 5. Bd3 Nc6 6. Nxc6 dxc6 7. 0-0 e5 8. Nd2 b5 9. a4 Nf6 10. axb5 cxb5 11. Bxb5+ Bd7 12. Bxd7+ Qxd7 13. Qe2 Qc6 14. Nc4 Qxe4 15. Qxe4 Nxe4 16. Re1 Nf6 17. Nxe5 Bc5 18. Ng6+ Kd7 19. Nxh8 Rxh8 20. Be3 Bxe3 21. Rxe3 Ra8 22. Rea3 Nd5 23. Rxa6 Rxa6 24. Rxa6 Nb4 25. Ra7+ Ke6 26. c3 Nd3 27. b4 Nb2 28. b5 Nc4 29. b6 1-0

[Event "Scarborough CC-ch"]
[Site "Toronto"]
[Date "2019.04.11"]
[Round "2.8"]
[White "De Costa, Alex"]
[Black "Zheng, Kevin"]
[Result "1-0"]
[ECO "B31"]
[WhiteElo "1787"]
[BlackElo "1908"]
[PlyCount "99"]
[EventDate "2019.04.04"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. 0-0 Bg7 5. c3 e5 6. Na3 Nge7 7. Nc2 Qb6 8. a4 a6 9. Be2 d5 10. d3 0-0 11. Ne3 Rd8 12. Qc2 dxe4 13. dxe4 Be6 14. Nc4 Bxc4 15. Bxc4 Na5 16. Be2 c4 17. Be3 Qc6 18. Nd2 b5 19. b4 Nb7 20. a5 Rd7 21. Rfd1 Rf8 22. Nf1 Nd6 23. Bc5 Nec8 24. Ne3 h5 25. Bf3 Rfd8 26. Nd5 Nb7 27. Be3 Qe6 28. Rd2 f5 29. Bg5 Rf8 30. Rad1 Nbd6 31. Be3 Rff7 32. exf5 Qxf5 33. Qxf5 Rxf5 34. Nb6 Rc7 35. Rxd6 Nxd6 36. Rxd6 Rf6 37. Bd5+ Kh7 38. Rd8 Rf8 39. Bg5 Bh6 40. Rxf8 Bxf8 41. Be4 Kg7 42. Kf1 Kf7 43. Ke2 Ke6 44. Bd8 Rg7 45. Na8 Rd7 46. Bb6 Bh6 47. Nc7+ Kf7 48. Nxa6 Bd2 49. Nc5 Rd6 50. Bc7 1-0

[Event "Scarborough CC Falling Leaves"]
[Site "Toronto"]
[Date "2018.11.29"]
[Round "5.4"]
[White "Issani, Nameer"]
[Black "De Costa, Alex"]
[Result "1-0"]
[ECO "E92"]
[WhiteElo "2175"]
[BlackElo "1775"]
[PlyCount "49"]
[EventDate "2018.11.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[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. Nf3 0-0 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Re8 10. 0-0-0 c6 11. Nxe5 Nxe4 12. Nxe4 Bxe5 13. f4 Bg7 14. Bf3 Na6 15. Nd6 Re3 16. f5 Re5 17. g4 gxf5 18. gxf5 Bxf5 19. Bf4 Rc5 20. a3 Ra5 21. Nxb7 Ra4 22. Nd6 Bg6 23. Bxc6 Rb8 24. Bxa4 Rxb2 25. Nf5 1-0

[Event "Scarborough CC Spring into Summer"]
[Site "Toronto"]
[Date "2018.06.28"]
[Round "5.5"]
[White "De Costa, Alex"]
[Black "Huang, Youhe"]
[Result "1/2-1/2"]
[ECO "B87"]
[WhiteElo "1819"]
[BlackElo "1950"]
[PlyCount "48"]
[EventDate "2018.05.31"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. 0-0 b5 8. Bb3 b4 9. Na4 Nxe4 10. Qf3 d5 11. c4 bxc3 12. Nxc3 Nc5 13. Bc2 Bb7 14. Re1 Nc6 15. Nxc6 Bxc6 16. Bf4 Rc8 17. Qg3 Qb6 18. Rab1 Nd7 19. Bd3 h6 20. Re2 Qd4 21. Rd1 Qf6 22. Bxa6 Ra8 23. Bd3 g5 24. Bd6 Rd8 1/2-1/2

[Event "Scarborough CC Spring into Summer"]
[Site "Toronto"]
[Date "2018.06.14"]
[Round "3.4"]
[White "De Costa, Alex"]
[Black "Sharpe, Sam"]
[Result "0-1"]
[ECO "B88"]
[WhiteElo "1819"]
[BlackElo "1921"]
[PlyCount "62"]
[EventDate "2018.05.31"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. 0-0 Be7 8. Bb3 0-0 9. Be3 Qc7 10. f4 Nc6 11. Qf3 e5 12. Nf5 Bxf5 13. exf5 Rfe8 14. Rad1 Rad8 15. g4 exf4 16. Bxf4 Ne5 17. Bxe5 dxe5 18. g5 e4 19. Qg2 Rxd1 20. Rxd1 Qc5+ 21. Qf2 Qxf2+ 22. Kxf2 Ng4+ 23. Kg3 Ne3 24. Re1 Bd6+ 25. Kh3 Bf4 26. g6 hxg6 27. fxg6 Re5 28. gxf7+ Kf8 29. Rxe3 Bxe3 30. Nd5 Bc5 31. Nc7 e3 0-1

[Event "Scarborough CC Spring into Summer"]
[Site "Toronto"]
[Date "2018.05.31"]
[Round "1.6"]
[White "Wang, Thomas"]
[Black "De Costa, Alex"]
[Result "1-0"]
[ECO "B43"]
[WhiteElo "1826"]
[BlackElo "1819"]
[PlyCount "33"]
[EventDate "2018.05.31"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "CAN"]
[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 a6 5. Nc3 Qc7 6. Be2 b5 7. a3 Bb7 8. Bf3 Nf6 9. 0-0 Nc6 10. Be3 Ne5 11. Re1 Nxf3+ 12. Qxf3 d5 13. exd5 Nxd5 14. Nxd5 Bxd5 15. Bf4 Qa7 16. Qxd5 Be7 17. Qc6+ 1-0

[Event "Scarborough CC-ch"]
[Site "Toronto"]
[Date "2018.04.19"]
[Round "3"]
[White "Ning, Eric"]
[Black "De Costa, Alex"]
[Result "1-0"]
[ECO "E97"]
[WhiteElo "1807"]
[BlackElo "1652"]
[PlyCount "65"]
[EventDate "2018.04.05"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "CAN"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. 0-0 Nc6 8. d5 Ne7 9. b4 Nh5 10. Ba3 Nf4 11. c5 Nxe2+ 12. Qxe2 f5 13. Rac1 fxe4 14. Qxe4 Bf5 15. Qc4 Rc8 16. b5 Kh8 17. Rcd1 Ng8 18. Nd2 Nf6 19. Nde4 Nh5 20. Qb4 dxc5 21. Qxc5 Nf4 22. f3 Rf7 23. Qc4 Bf8 24. Bxf8 Rxf8 25. Qa4 Qe7 26. Qxa7 Ra8 27. Qxb7 Bxe4 28. Nxe4 Rxa2 29. Rf2 Rfa8 30. d6 Qd8 31. Qxc7 Qh4 32. d7 Rxf2 33. d8Q+ 1-0

[Event "Scarborough CC-ch"]
[Site "Toronto"]
[Date "2018.04.12"]
[Round "2.6"]
[White "De Costa, Alex"]
[Black "Feng, Richard"]
[Result "0-1"]
[ECO "B52"]
[WhiteElo "1835"]
[BlackElo "2075"]
[PlyCount "46"]
[EventDate "2018.04.05"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. 0-0 Nf6 6. Re1 Nc6 7. d4 e5 8. c3 Be7 9. d5 Na5 10. Nfd2 b5 11. b4 Nb7 12. a4 cxb4 13. cxb4 0-0 14. Nc3 a5 15. Ba3 axb4 16. Bxb4 bxa4 17. Nxa4 Qb5 18. Qb3 Ra6 19. Nc3 Rxa1 20. Rxa1 Qd3 21. Qb2 Rb8 22. Ra7 Qd4 23. Nb5 Qxb2 0-1

[Event "Scarborough CC Winter Swiss"]
[Site "Toronto"]
[Date "2018.03.22"]
[Round "5.5"]
[White "Tavana, Joseph"]
[Black "De Costa, Alex"]
[Result "0-1"]
[ECO "A48"]
[WhiteElo "1804"]
[BlackElo "1820"]
[PlyCount "68"]
[EventDate "2018.02.22"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. e3 g6 3. Nf3 Bg7 4. Bd3 d6 5. 0-0 0-0 6. b3 Nbd7 7. Bb2 e5 8. Nbd2 c6 9. dxe5 Ng4 10. c4 Ngxe5 11. Nxe5 dxe5 12. Qc2 Nc5 13. Be2 a5 14. a3 Bf5 15. e4 Bc8 16. f4 Qb6 17. Kh1 exf4 18. Bxg7 Kxg7 19. Qc3+ Kg8 20. Rxf4 Be6 21. Raf1 Rad8 22. Rh4 f5 23. Qe3 Qc7 24. b4 axb4 25. axb4 Nd7 26. exf5 Bxf5 27. Rxf5 Rxf5 28. Qe6+ Kg7 29. Qe7+ Rf7 30. Rxh7+ Kxh7 31. Qxf7+ Kh8 32. Bd3 Qd6 33. Qxg6 Qxg6 34. Bxg6 Ne5 0-1

[Event "Scarborough CC Jack Frost"]
[Site "Toronto"]
[Date "2018.02.15"]
[Round "6.3"]
[White "Hay, Jonathan"]
[Black "De Costa, Alex"]
[Result "0-1"]
[ECO "A45"]
[WhiteElo "1944"]
[BlackElo "1858"]
[PlyCount "98"]
[EventDate "2018.01.11"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. Bf4 g6 3. Nc3 d5 4. e3 Bg7 5. h4 c6 6. Nf3 Nbd7 7. Bd3 0-0 8. Ne5 Nxe5 9. Bxe5 b5 10. h5 Nxh5 11. Rxh5 gxh5 12. Qxh5 f5 13. 0-0-0 Bxe5 14. Rh1 Rf7 15. dxe5 e6 16. g4 Qe7 17. Ne2 c5 18. gxf5 exf5 19. Ng3 Qxe5 20. Qg5+ Qg7 21. Qd8+ Qf8 22. Qxd5 Bb7 23. Qe5 Bxh1 24. Bxf5 Rxf5 25. Nxf5 Re8 26. Nh6+ Qxh6 27. Qxe8+ Qf8 28. Qe6+ Qf7 29. Qg4+ Kh8 30. Qc8+ Qg8 31. Qxc5 Qg1+ 32. Kd2 Qxf2+ 33. Kd3 Qf1+ 34. Kc3 Qf6+ 35. Kb3 Qe6+ 36. Ka3 Qa6+ 37. Kb3 Qa4+ 38. Kc3 b4+ 39. Kd2 Qd7+ 40. Ke1 Qg7 41. Qxb4 Qg1+ 42. Kd2 Qf2+ 43. Kd3 Qf1+ 44. Kd4 Qd1+ 45. Ke5 Qh5+ 46. Kf6 Qg6+ 47. Ke7 Qg5+ 48. Kf8 Qf6+ 49. Ke8 Bc6# 0-1

[Event "Scarborough CC Jack Frost"]
[Site "Toronto"]
[Date "2018.01.18"]
[Round "2.2"]
[White "De Costa, Alex"]
[Black "Southam, David"]
[Result "0-1"]
[ECO "A08"]
[WhiteElo "1858"]
[BlackElo "2158"]
[PlyCount "86"]
[EventDate "2018.01.11"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "CAN"]
[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 c5 4. g3 Bd6 5. Bg2 Ne7 6. Ngf3 Nbc6 7. 0-0 0-0 8. Nh4 Qc7 9. f4 f6 10. f5 dxe4 11. dxe4 Ne5 12. Ndf3 Bd7 13. Nxe5 Bxe5 14. c3 Rad8 15. Qc2 Bb5 16. Re1 Bd3 17. Qf2 exf5 18. Nxf5 b6 19. Be3 Bc4 20. Bf4 Ng6 21. Bxe5 Nxe5 22. Red1 Rxd1+ 23. Rxd1 Bxa2 24. Qc2 Bf7 25. Rd6 Rd8 26. Rxd8+ Qxd8 27. Ne3 Qd3 28. Qc1 Be6 29. Nd5 Bxd5 30. exd5 Ng4 31. Qe1 Qe3+ 32. Qxe3 Nxe3 33. Be4 g6 34. h3 Kf7 35. Kf2 Nd1+ 36. Ke2 Nxb2 37. Kd2 Nc4+ 38. Kc2 Nd6 39. Bf3 f5 40. Kb3 Kf6 41. h4 b5 42. Kc2 Ke5 43. Kd3 a5 0-1

[Event "Scarborough CC Falling Leaves"]
[Site "Toronto"]
[Date "2017.12.07"]
[Round "6.7"]
[White "Feng, Richard"]
[Black "De Costa, Alex"]
[Result "1-0"]
[ECO "B41"]
[WhiteElo "1899"]
[BlackElo "1874"]
[PlyCount "47"]
[EventDate "2017.11.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[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 a6 5. c4 Nf6 6. Nc3 Qc7 7. Be2 Bb4 8. Qd3 Nc6 9. f4 d6 10. 0-0 Nxd4 11. Bd1 Nc6 12. Qg3 0-0 13. e5 dxe5 14. fxe5 Qxe5 15. Bf4 Qc5+ 16. Be3 Qe7 17. Bg5 Bc5+ 18. Kh1 Bd4 19. Bc2 b6 20. Qh4 h6 21. Ne4 Bb7 22. Rxf6 Bxf6 23. Nxf6+ gxf6 24. Qxh6 1-0

[Event "Scarborough CC Falling Leaves"]
[Site "Toronto"]
[Date "2017.11.30"]
[Round "5.5"]
[White "De Costa, Alex"]
[Black "Palacios, Bobby"]
[Result "0-1"]
[ECO "B51"]
[WhiteElo "1874"]
[BlackElo "2015"]
[PlyCount "52"]
[EventDate "2017.11.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. 0-0 a6 5. Bc4 Ngf6 6. Re1 b5 7. Bf1 Bb7 8. d3 g6 9. c3 Bg7 10. Nbd2 0-0 11. g3 Qc7 12. Bg2 Rad8 13. Nf1 c4 14. Bf4 cxd3 15. Qxd3 Nc5 16. Qe2 Nfxe4 17. Rad1 e5 18. Bc1 h6 19. N1d2 f5 20. Nxe4 fxe4 21. Nd2 Nd3 22. Rf1 d5 23. Nb3 a5 24. Be3 g5 25. Nc1 d4 26. Nxd3 exd3 0-1

[Event "Scarborough CC Falling Leaves"]
[Site "Toronto"]
[Date "2017.11.16"]
[Round "3.7"]
[White "Ghazarian, Tigran"]
[Black "De Costa, Alex"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1834"]
[BlackElo "1874"]
[PlyCount "76"]
[EventDate "2017.11.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. c3 Nf6 4. e5 Nd5 5. d4 cxd4 6. cxd4 d6 7. Nc3 Nxc3 8. bxc3 Nc6 9. Bf4 Be7 10. Bd3 dxe5 11. Nxe5 Nxe5 12. Bxe5 0-0 13. 0-0 Bd6 14. Bxd6 Qxd6 15. Qe2 Rd8 16. Bc2 g6 17. Rfe1 Bd7 18. h4 Bc6 19. Qe3 Bd5 20. h5 Rac8 21. Rac1 Rc7 22. Qg5 Rdc8 23. Rcd1 Qf8 24. Be4 Bxe4 25. Rxe4 Rxc3 26. Rh4 Rc2 27. g3 Rxa2 28. Kg2 Rcc2 29. Rf1 h6 30. Qf6 Qg7 31. Qd8+ Kh7 32. Rf4 gxh5 33. Rf6 Rc3 34. Kh1 h4 35. Qe7 hxg3 36. Rg1 g2+ 37. Kh2 Raa3 38. Rxg2 Rh3+ 0-1

[Event "Scarborough CC Falling Leaves"]
[Site "Toronto"]
[Date "2017.11.09"]
[Round "2.3"]
[White "De Costa, Alex"]
[Black "Plotkin, Mark"]
[Result "0-1"]
[ECO "C65"]
[WhiteElo "1874"]
[BlackElo "2293"]
[PlyCount "62"]
[EventDate "2017.11.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Ne7 5. 0-0 Ng6 6. d4 c6 7. Bc4 Nxe4 8. Re1 d5 9. Nxe5 Nxe5 10. dxe5 Bc5 11. Rxe4 dxe4 12. Qxd8+ Kxd8 13. Bg5+ Be7 14. Bf4 b5 15. Bb3 f5 16. exf6 Bxf6 17. Nc3 Bf5 18. Rd1+ Ke7 19. Re1 Bxc3 20. bxc3 Kf6 21. c4 b4 22. c5 Rhe8 23. Bd6 Be6 24. h3 Bxb3 25. cxb3 a5 26. Kh2 a4 27. Re3 axb3 28. axb3 g5 29. Kg3 Re6 30. Kg4 h5+ 31. Kxh5 Kf5 0-1

[Event "Scarborough CC Howard Ridout"]
[Site "Toronto"]
[Date "2017.10.26"]
[Round "7.7"]
[White "De Costa, Alex"]
[Black "Ning, Eric"]
[Result "0-1"]
[ECO "B31"]
[WhiteElo "2024"]
[BlackElo "1890"]
[PlyCount "104"]
[EventDate "2017.09.14"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. Bxc6 bxc6 5. d4 Bg7 6. Be3 Nf6 7. Nc3 Rb8 8. e5 Ng4 9. Bf4 0-0 10. dxc5 Qa5 11. 0-0 Qxc5 12. e6 d6 13. Ng5 f5 14. Qd2 h6 15. Nf3 g5 16. Be3 Nxe3 17. Qxe3 Qxe3 18. fxe3 Bxe6 19. Nd4 Bd7 20. Rab1 e5 21. Nde2 Rb7 22. a3 a5 23. e4 f4 24. Rbd1 Rf6 25. b3 Bf8 26. Rf3 g4 27. Rfd3 Bc8 28. Na4 Rbf7 29. Nb6 Ba6 30. Nc4 h5 31. R3d2 a4 32. Nc3 axb3 33. cxb3 Bxc4 34. bxc4 f3 35. g3 Ra7 36. a4 Rff7 37. Kf1 Rfb7 38. Rd3 Rb4 39. h3 Rxc4 40. h4 Rb4 41. R3d2 Kf7 42. Rd3 Ke6 43. R3d2 Rd7 44. Rd3 Rd8 45. R3d2 Bh6 46. Rd3 Rb2 47. Kg1 Rg2+ 48. Kf1 Rxg3 49. a5 Bf8 50. a6 Ra8 51. Ra1 Rh3 52. Kf2 Rh2+ 0-1

[Event "Scarborough CC Howard Ridout"]
[Site "Toronto"]
[Date "2017.10.19"]
[Round "6.9"]
[White "De Costa, Alex"]
[Black "Manalo, Pepin"]
[Result "1-0"]
[ECO "B30"]
[WhiteElo "1890"]
[BlackElo "1851"]
[PlyCount "62"]
[EventDate "2017.09.14"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 Qc7 4. 0-0 d6 5. Re1 e5 6. Nc3 Bd7 7. Nd5 Qc8 8. c3 a6 9. Ba4 Qd8 10. d4 b5 11. Bc2 h6 12. b4 c4 13. dxe5 dxe5 14. Be3 Rb8 15. a4 Nf6 16. axb5 axb5 17. Ra6 Qc8 18. Qa1 Bd6 19. Nxf6+ gxf6 20. Rd1 Ke7 21. Rd5 Be6 22. Rd2 h5 23. Bd1 h4 24. Rda2 h3 25. g3 Rd8 26. Nh4 Ke8 27. Bf3 Qc7 28. Nf5 Bf8 29. Bg4 Rd3 30. Bxh3 Rbd8 31. Bg4 Bc8 1-0

[Event "Scarborough CC Howard Ridout"]
[Site "Toronto"]
[Date "2017.10.05"]
[Round "4.8"]
[White "Sivapathasundaram, Manojh"]
[Black "De Costa, Alex"]
[Result "1/2-1/2"]
[ECO "B43"]
[WhiteElo "1837"]
[BlackElo "1890"]
[PlyCount "44"]
[EventDate "2017.09.14"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[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 a6 5. Nc3 Qc7 6. Be3 Bb4 7. Qd2 Nf6 8. Bd3 d5 9. exd5 Nxd5 10. Nde2 Nxe3 11. Qxe3 Nc6 12. a3 Be7 13. Qg3 Qxg3 14. Nxg3 b5 15. 0-0 0-0 16. Rfd1 Bb7 17. Be4 Rfd8 18. Nge2 Bf6 19. Kf1 Rab8 20. Rxd8+ Rxd8 21. Rd1 Rxd1+ 22. Nxd1 Na5 1/2-1/2

[Event "Scarborough CC Howard Ridout"]
[Site "Toronto"]
[Date "2017.09.21"]
[Round "2.8"]
[White "Huang, Youhe"]
[Black "De Costa, Alex"]
[Result "1-0"]
[ECO "B41"]
[WhiteElo "1849"]
[BlackElo "1890"]
[PlyCount "73"]
[EventDate "2017.09.14"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[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 a6 5. c4 Nf6 6. Nc3 Qc7 7. Be3 Bb4 8. Qd3 Ng4 9. Nc2 Nxe3 10. Nxb4 Nxf1 11. Kxf1 0-0 12. Rd1 b6 13. h4 Bb7 14. h5 h6 15. Rh3 Qc5 16. a3 Nc6 17. Nxc6 Bxc6 18. b4 Qe7 19. Qd6 Qf6 20. b5 axb5 21. cxb5 Bb7 22. a4 Rac8 23. Qxb6 Ba8 24. Qd4 Qe7 25. Rg3 f5 26. Qxd7 Qf6 27. Qd4 e5 28. Qd6 Qf7 29. Qd7 Qc4+ 30. Qd3 Qf7 31. exf5 e4 32. Qd7 Qc4+ 33. Kg1 Rf7 34. Qe6 Qc7 35. f6 Kh8 36. fxg7+ Rxg7 37. Rxg7 1-0

[Event "CAN-ch U14"]
[Site "Windsor"]
[Date "2016.07.08"]
[Round "6.35"]
[White "De Costa, Alex"]
[Black "Li, Yang"]
[Result "1-0"]
[ECO "C84"]
[WhiteElo "1786"]
[BlackElo "1075"]
[PlyCount "127"]
[EventDate "2016.07.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. c3 h6 6. Nbd2 a6 7. Ba4 Be7 8. 0-0 0-0 9. Re1 Re8 10. Nf1 Bg4 11. h3 Bxf3 12. Qxf3 Qd7 13. Ng3 Nd4 14. Qd1 b5 15. Bc2 Nxc2 16. Qxc2 d5 17. Nf5 dxe4 18. Nxe7+ Rxe7 19. dxe4 Rd8 20. Be3 Qd3 21. Qxd3 Rxd3 22. f3 Nd7 23. Rad1 Rd6 24. Rxd6 cxd6 25. Rd1 Re6 26. a4 bxa4 27. Ra1 Nc5 28. Bxc5 dxc5 29. Rxa4 Kf8 30. Rc4 Rb6 31. Rxc5 Rxb2 32. Rxe5 Ra2 33. c4 a5 34. c5 a4 35. c6 Rc2 36. Ra5 Rc4 37. c7 Ke7 38. Rxa4 Rxc7 39. Ra2 f6 40. Kf2 Kd6 41. Rd2+ Ke5 42. Rd5+ Ke6 43. Kg3 Rd7 44. Rxd7 Kxd7 45. Kf4 Ke6 46. Ke3 Kd6 47. Kd4 Ke6 48. f4 g6 49. e5 fxe5+ 50. fxe5 h5 51. h4 Kd7 52. Kd5 Ke7 53. e6 Ke8 54. Kd6 g5 55. hxg5 h4 56. e7 h3 57. gxh3 Kf7 58. Kd7 Kg7 59. e8Q Kh7 60. Ke6 Kg7 61. Kf5 Kh7 62. g6+ Kg7 63. Qf7+ Kh8 64. Qh7# 1-0

[Event "CAN-ch U14"]
[Site "Windsor"]
[Date "2016.07.08"]
[Round "7.30"]
[White "De Costa, Alex"]
[Black "Singh, Malhar"]
[Result "1-0"]
[ECO "C18"]
[WhiteElo "1786"]
[BlackElo "1592"]
[PlyCount "91"]
[EventDate "2016.07.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[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 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. h4 Nbc6 8. h5 Qc7 9. h6 g6 10. Nf3 Bd7 11. Bg5 0-0-0 12. Bf6 Rhg8 13. Ng5 Rde8 14. Nxh7 Rh8 15. Ng5 Nf5 16. Bxh8 Rxh8 17. Nxf7 Rh7 18. Ng5 Rxh6 19. Rxh6 Nxh6 20. Be2 Nf5 21. Nf3 Qa5 22. Qd2 cxd4 23. cxd4 Qxd2+ 24. Kxd2 Nfxd4 25. Nxd4 Nxd4 26. Bd3 g5 27. Rh1 Nc6 28. Rh5 Nxe5 29. Rxg5 Nc6 30. Bb5 Na5 31. Rg8+ Kc7 32. Rg7 Nc6 33. Bxc6 bxc6 34. Ke3 e5 35. g4 Kd6 36. g5 a5 37. g6 Bf5 38. c3 c5 39. Rg8 Ke7 40. g7 d4+ 41. cxd4 exd4+ 42. Kd2 c4 43. Rf8 c3+ 44. Kc1 Bh7 45. g8Q Bxg8 46. Rxg8 1-0

[Event "CAN-ch U14"]
[Site "Windsor"]
[Date "2016.07.07"]
[Round "4.26"]
[White "De Costa, Alex"]
[Black "Liu, Zhanhe"]
[Result "0-1"]
[ECO "B24"]
[WhiteElo "1766"]
[BlackElo "1993"]
[PlyCount "44"]
[EventDate "2016.07.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Be3 e6 7. Qd2 Rb8 8. Nf3 b5 9. 0-0 Nge7 10. Bh6 0-0 11. Bxg7 Kxg7 12. d4 b4 13. Ne2 cxd4 14. Nfxd4 Qc7 15. Nxc6 Nxc6 16. Rfd1 Rd8 17. Rac1 Qa5 18. c3 b3 19. a3 Qc5 20. Nd4 Na5 21. Qe3 Ba6 22. Nf5+ exf5 0-1

[Event "CAN-ch U14"]
[Site "Windsor"]
[Date "2016.07.07"]
[Round "5.31"]
[White "Gaur, Shivan"]
[Black "De Costa, Alex"]
[Result "1-0"]
[ECO "E63"]
[WhiteElo "1211"]
[BlackElo "1786"]
[PlyCount "72"]
[EventDate "2016.07.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d6 5. Nf3 0-0 6. Nc3 Nc6 7. 0-0 a6 8. h3 Rb8 9. a4 a5 10. e4 e5 11. Bg5 exd4 12. Nxd4 Nxd4 13. Qxd4 h6 14. Bd2 Re8 15. Qd3 Nd7 16. Qc2 Nc5 17. Rfe1 Be6 18. Ne2 c6 19. Nf4 Qb6 20. Bc3 Bxc4 21. Bxg7 Bb3 22. Qc3 Nxa4 23. Qf6 Qd8 24. Qxd8 Rbxd8 25. Bxh6 f6 26. Nd3 g5 27. h4 Bc2 28. hxg5 b5 29. Nf4 fxg5 30. Bxg5 Ra8 31. Re2 Bb3 32. Rd2 Rec8 33. Rxd6 Bc4 34. e5 Nxb2 35. Rxc6 Rxc6 36. Bxc6 a4 1-0

[Event "CAN-ch U14"]
[Site "Windsor"]
[Date "2016.07.06"]
[Round "2.24"]
[White "De Costa, Alex"]
[Black "Liang, Hairan"]
[Result "0-1"]
[ECO "B25"]
[WhiteElo "1784"]
[BlackElo "2182"]
[PlyCount "88"]
[EventDate "2016.07.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e5 6. f4 d6 7. Nh3 Nge7 8. 0-0 0-0 9. f5 gxf5 10. Qh5 f6 11. exf5 Qe8 12. Qg4 Nd4 13. Rf2 Bxf5 14. Qd1 Qd7 15. Qf1 d5 16. Kh1 Be6 17. Be3 Nef5 18. Bc1 Rf7 19. Ng1 Raf8 20. Nf3 Nxf3 21. Bxf3 Nd4 22. Bg2 b5 23. Nd1 Kh8 24. c3 Nf5 25. Ne3 Nxe3 26. Bxe3 d4 27. cxd4 cxd4 28. Bd2 Bd5 29. b3 f5 30. Rc1 e4 31. Bb4 Re8 32. dxe4 fxe4 33. Rxf7 Qxf7 34. Qxf7 Bxf7 35. Rc7 Bh5 36. Rxa7 d3 37. Rd7 Bg6 38. Bf1 Bf5 39. Rd5 Bg4 40. Kg1 Bh6 41. Bg2 Be3+ 42. Kf1 Rc8 43. Ba3 d2 44. Bxe4 Rc1+ 0-1

[Event "CAN-ch U14"]
[Site "Windsor"]
[Date "2016.07.06"]
[Round "3.31"]
[White "Jeyakumar, Yathushan"]
[Black "De Costa, Alex"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1261"]
[BlackElo "1786"]
[PlyCount "130"]
[EventDate "2016.07.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3 Nf6 6. Be3 cxd4 7. Nxd4 Nxd4 8. Bxd4 e5 9. Be3 Qxd1+ 10. Kxd1 Bf5 11. Bb5+ Nd7 12. Ke2 Be7 13. Rd1 a6 14. Ba4 b5 15. Bb3 0-0 16. h3 Nc5 17. Bxc5 Bxc5 18. Rd5 Ba7 19. Rxe5 Rfe8 20. Rxe8+ Rxe8+ 21. Kf3 Re1 22. g4 Be4+ 23. Kg3 Rxb1 24. Rxb1 Bxb1 25. f4 Be3 26. Bd5 Bc1 27. Bb3 Bxb2 28. c4 bxc4 29. Bxc4 a5 30. Bb3 Kf8 31. f5 Ke7 32. Kf4 f6 33. h4 Kd6 34. g5 Kc5 35. Bg8 h6 36. gxh6 gxh6 37. Be6 Kb4 38. Ke3 Ka3 39. Kf4 Bxa2 40. Kg4 a4 41. Kh5 Bc1 42. Kg6 Bb2 43. Kxh6 Bb3 44. Bd7 Kb4 45. Bxa4 Bxa4 46. Kg6 Kc5 47. h5 Be8+ 48. Kh6 Bxh5 49. Kxh5 Kd5 50. Kh4 Ke4 51. Kg4 Ke5 52. Kf3 Kxf5 53. Kg3 Ke4 54. Kg2 Ke3 55. Kf1 f5 56. Ke1 f4 57. Kf1 Kf3 58. Ke1 Kg2 59. Ke2 f3+ 60. Ke1 f2+ 61. Ke2 f1Q+ 62. Ke3 Qf5 63. Ke2 Qe4+ 64. Kd1 Qd3+ 65. Ke1 Bc3# 0-1

[Event "CAN-ch U14"]
[Site "Windsor"]
[Date "2016.07.05"]
[Round "1.36"]
[White "Masse, Wade"]
[Black "De Costa, Alex"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "917"]
[BlackElo "1784"]
[PlyCount "84"]
[EventDate "2016.07.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[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 a6 5. Nc3 Qc7 6. Nf3 b5 7. a3 Bb7 8. Be2 Nc6 9. 0-0 Be7 10. b4 Nf6 11. Re1 d6 12. Bf4 0-0 13. Bd3 Nxb4 14. axb4 Qxc3 15. Rb1 Nd7 16. Rb3 Qc6 17. Be3 Nb6 18. Qd2 Nc4 19. Bxc4 bxc4 20. Rc3 Qb5 21. Rb1 Bxe4 22. Nd4 Qb7 23. Bh6 gxh6 24. Rg3+ Bg6 25. Qxh6 Qe4 26. Nf3 Qxc2 27. Re1 Rab8 28. Nh4 Bxh4 29. Qxh4 Rxb4 30. h3 Rb3 31. Qg4 Rxg3 32. fxg3 c3 33. h4 Qf5 34. Qxf5 Bxf5 35. Rc1 c2 36. Kf1 Rb8 37. Ke2 Rb1 38. Kd2 a5 39. g4 Be4 40. g5 a4 41. h5 a3 42. g6 fxg6 0-1

[Event "CAN-ch U14"]
[Site "Windsor"]
[Date "2015.07.09"]
[Round "7.34"]
[White "Anandji, Aaron"]
[Black "De Costa, Alex"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1046"]
[BlackElo "1823"]
[PlyCount "146"]
[EventDate "2015.07.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. f4 d5 4. Bb5+ Nc6 5. Bxc6+ bxc6 6. Nf3 Nf6 7. d3 Be7 8. 0-0 0-0 9. e5 Nd7 10. Qe1 Nb6 11. Qg3 c4 12. Kh1 cxd3 13. cxd3 Ba6 14. Ng5 h6 15. Nh3 d4 16. Ne2 c5 17. f5 Bh4 18. Qf3 exf5 19. Qxf5 c4 20. Nef4 cxd3 21. Rd1 Qc7 22. Bd2 Rae8 23. Nxd3 Bxd3 24. Qxd3 Qxe5 25. Bf4 Qf6 26. Qxd4 Qxd4 27. Rxd4 Re2 28. Rd2 Rfe8 29. Rxe2 Rxe2 30. g3 Bf6 31. Bc1 Nc4 32. Nf4 Re1+ 33. Kg2 Nxb2 34. Bxb2 Rxa1 35. Bxa1 Bxa1 36. Nd5 Kf8 37. g4 Ke8 38. Kf3 Kd7 39. Ke4 Kd6 40. h4 Kc5 41. Ne3 Bf6 42. h5 Bb2 43. Kd3 Kb4 44. Nc2+ Ka4 45. Kc4 Be5 46. Kc5 Bg3 47. Kd4 Kb5 48. Na3+ Kc6 49. Ke4 Kc5 50. Ke3 Kb4 51. Nb1 g6 52. g5 hxg5 53. h6 f5 54. Nd2 Be5 55. Nf3 Bf6 56. h7 g4 57. Nd4 f4+ 58. Kd3 g3 59. Nf3 Ka3 60. Ke4 Kxa2 61. Kxf4 Kb2 62. Kxg3 a5 63. Nd2 a4 64. Nc4+ Kc3 65. Nb6 Kb3 66. Nd7 Bg7 67. Nc5+ Kb4 68. Na6+ Kc3 69. Nc5 a3 70. Ne4+ Kd4 71. Nd6 Kd3 72. Nb7 a2 73. Nc5+ Kc4 0-1

[Event "CAN-ch U14"]
[Site "Windsor"]
[Date "2015.07.09"]
[Round "6.30"]
[White "De Costa, Alex"]
[Black "Igbokwe, Timothy"]
[Result "0-1"]
[ECO "C18"]
[WhiteElo "1823"]
[BlackElo "1129"]
[PlyCount "96"]
[EventDate "2015.07.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[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 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qc7 7. Bd2 Nc6 8. Qg4 Nge7 9. h4 Bd7 10. Nf3 Rg8 11. Bd3 Nf5 12. h5 0-0-0 13. Nh4 cxd4 14. Nxf5 exf5 15. Qh4 Qxe5+ 16. Kf1 dxc3 17. Bf4 Qd4 18. Qg3 Rde8 19. Rb1 Qa4 20. Rb3 d4 21. Bc7 Be6 22. Bb5 Bc4+ 23. Bxc4 Qxc4+ 24. Kg1 Re1+ 25. Kh2 Rxh1+ 26. Kxh1 g6 27. Bf4 Rd8 28. Bd6 d3 29. Qxd3 Qxd3 30. cxd3 Rxd6 31. Rxc3 Kd7 32. Kh2 Ne5 33. d4 Nc6 34. hxg6 hxg6 35. Rb3 Kc7 36. Rh3 Rxd4 37. Rh7 Rd7 38. Kg3 Kd6 39. Kf4 Ke6 40. Rh3 Rd4+ 41. Ke3 Re4+ 42. Kf3 Ra4 43. Ke2 Nd4+ 44. Kd2 Nb5 45. Rb3 a6 46. Ke1 Rxa3 47. Rb2 Ra1+ 48. Ke2 Ra2 0-1

[Event "CAN-ch U14"]
[Site "Windsor"]
[Date "2015.07.08"]
[Round "4.29"]
[White "De Costa, Alex"]
[Black "Li, Kevin1111"]
[Result "0-1"]
[ECO "C10"]
[WhiteElo "1823"]
[BlackElo "1666"]
[PlyCount "98"]
[EventDate "2015.07.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[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. Bg5 Be7 7. Nxf6+ Nxf6 8. Bd3 h6 9. Bh4 b6 10. Ne5 0-0 11. Bxf6 Bxf6 12. Be4 Bxe5 13. Bxa8 Bxd4 14. c3 Ba6 15. Bf3 Bf6 16. Qxd8 Rxd8 17. Rd1 Rxd1+ 18. Bxd1 Bc4 19. Bb3 Bxb3 20. axb3 a5 21. 0-0 Kf8 22. Rd1 Ke7 23. g3 Be5 24. Kg2 Bd6 25. Kf3 Kf6 26. Ke4 g6 27. f4 Ke7 28. Kd4 Kd7 29. Kc4 f5 30. Kb5 Ke7 31. Kc6 Kf6 32. c4 g5 33. fxg5+ hxg5 34. Rf1 Kg6 35. Rf3 Kh5 36. h3 g4 37. hxg4+ Kxg4 38. Re3 Bxg3 39. Rxe6 f4 40. Kxc7 f3+ 41. Kxb6 f2 42. Rf6 Bf4 43. Rxf4+ Kxf4 44. c5 f1Q 45. c6 Qf2+ 46. Kb7 Qxb2 47. c7 Qxb3+ 48. Ka7 Qc4 49. Kb7 a4 0-1

[Event "CAN-ch U14"]
[Site "Windsor"]
[Date "2015.07.08"]
[Round "5.29"]
[White "Fox, Dylan"]
[Black "De Costa, Alex"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "1157"]
[BlackElo "1823"]
[PlyCount "92"]
[EventDate "2015.07.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3 Bg4 6. Be2 e6 7. Be3 cxd4 8. cxd4 Bb4+ 9. Nc3 Qa5 10. Qb3 Nf6 11. 0-0 Rb8 12. Rfd1 0-0 13. a3 Bxc3 14. bxc3 Nd5 15. Bd2 Qc7 16. Qc2 Bxf3 17. Bxf3 Nxd4 18. Qd3 Nxf3+ 19. Qxf3 Rbc8 20. Rac1 Nb6 21. Re1 Nc4 22. Bf4 Qc6 23. Qg3 Kh8 24. h4 Nxa3 25. Bd6 Nb5 26. Bxf8 Rxf8 27. Red1 Nc7 28. Qg5 Nd5 29. c4 Nf6 30. h5 h6 31. Qh4 Qc5 32. g4 Ne4 33. Rd7 Ng5 34. Qg3 Qc6 35. Rd3 Rc8 36. f4 Ne4 37. Qf3 Qb6+ 38. Qe3 Qb2 39. Rb3 Qd2 40. Qxd2 Nxd2 41. Rxb7 Rxc4 42. Rxc4 Nxc4 43. Rxf7 e5 44. Rxa7 exf4 45. Ra4 Ne5 46. Rxf4 Kh7 1/2-1/2

[Event "CAN-ch U14"]
[Site "Windsor"]
[Date "2015.07.07"]
[Round "2.22"]
[White "De Costa, Alex"]
[Black "Cai, Jason"]
[Result "0-1"]
[ECO "B26"]
[WhiteElo "1823"]
[BlackElo "2254"]
[PlyCount "64"]
[EventDate "2015.07.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e6 6. Be3 d6 7. Qd2 Rb8 8. Nge2 Nd4 9. Bxd4 cxd4 10. Nb5 a6 11. Nbxd4 Ne7 12. c3 0-0 13. 0-0 b5 14. f4 Qb6 15. Kh1 b4 16. Rfb1 Bd7 17. a3 bxc3 18. bxc3 Qxb1+ 19. Rxb1 Rxb1+ 20. Ng1 Bxd4 21. cxd4 Rc8 22. h3 Rcc1 23. Qa5 Rxg1+ 24. Kh2 Be8 25. Qd8 Kf8 26. Qxd6 Rgc1 27. f5 Rc6 28. Qe5 exf5 29. exf5 f6 30. Qe3 Nxf5 31. Qf4 Rc2 32. g4 Bc6 0-1

[Event "CAN-ch U14"]
[Site "Windsor"]
[Date "2015.07.07"]
[Round "3.28"]
[White "Krishnamohan, Vithushan"]
[Black "De Costa, Alex"]
[Result "0-1"]
[ECO "B42"]
[WhiteElo "1278"]
[BlackElo "1823"]
[PlyCount "38"]
[EventDate "2015.07.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[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 a6 5. Bd3 Nc6 6. Ne2 b5 7. a4 b4 8. c3 Nf6 9. 0-0 Bc5 10. Kh1 Ng4 11. Nd4 Qh4 12. Bf4 Nxf2+ 13. Rxf2 Qxf2 14. Nxc6 Qxf4 15. cxb4 Bd6 16. g3 Qf2 17. Na5 h5 18. Nc4 Bc7 19. e5 Bb7+ 0-1

[Event "CAN-ch U14"]
[Site "Windsor"]
[Date "2015.07.06"]
[Round "1.34"]
[White "Ladhani, Qalib"]
[Black "De Costa, Alex"]
[Result "0-1"]
[ECO "B21"]
[WhiteElo "1139"]
[BlackElo "1823"]
[PlyCount "114"]
[EventDate "2015.07.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. Bc4 e6 4. c3 d3 5. Qxd3 Nc6 6. Nf3 a6 7. b4 b5 8. Bb3 Bb7 9. Bf4 d6 10. h3 Nf6 11. Nbd2 Be7 12. 0-0 0-0 13. a3 d5 14. e5 Nd7 15. Bc2 g6 16. Rfe1 Re8 17. Nb3 Bf8 18. Nbd4 Qc7 19. Rad1 Rac8 20. Rc1 Bg7 21. Nxc6 Qxc6 22. Bb3 Nb6 23. Nd4 Qd7 24. Bg3 Rc7 25. Re2 Rec8 26. Rec2 Nc4 27. Bxc4 Rxc4 28. f4 Qe8 29. Bh4 a5 30. Kh2 axb4 31. cxb4 R8c7 32. Bf2 Qc8 33. Rxc4 dxc4 34. Qc3 Bc6 35. Nxc6 Rxc6 36. Bc5 Rc7 37. Qf3 Bf8 38. Bxf8 Kxf8 39. Qc3 Rd7 40. Qc2 Qa6 41. a4 bxa4 42. Qxc4 Qxc4 43. Rxc4 a3 44. Rc1 Ra7 45. Ra1 a2 46. g3 Ke7 47. Kg2 Kd7 48. Kf2 Ra3 49. Ke2 Kc7 50. Ke1 Kb6 51. b5 Kxb5 52. Kd2 Kb4 53. Kc2 Rc3+ 54. Kb2 Rb3+ 55. Kc2 Ka3 56. Kc1 Rb2 57. h4 h5 0-1

