[Event "Glorney Cup"]
[Site "Cardiff"]
[Date "2017.07.26"]
[Round "5.14"]
[White "Peoples, Jonathon"]
[Black "D Costa, Leston"]
[Result "1-0"]
[ECO "B35"]
[WhiteElo "1791"]
[BlackElo "1689"]
[PlyCount "59"]
[EventDate "2017.07.24"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "WLS"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]
[WhiteTeam "Ireland II"]
[BlackTeam "Scotland"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "SCO"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 Qa5 8. f3 0-0 9. Qd2 Qb4 10. Bb3 b6 11. 0-0-0 Bb7 12. h4 Rfc8 13. h5 Nxh5 14. Rxh5 Nxd4 15. Bxd4 Qxd4 16. Qxd4 Bxd4 17. Rxd4 gxh5 18. Rxd7 Bc6 19. Rxe7 Rf8 20. Kd2 Kg7 21. Ke3 Kg6 22. Ne2 Kf6 23. Rc7 Rac8 24. Rxa7 Ra8 25. Rxa8 Rxa8 26. Nd4 Bd7 27. Bd5 Rg8 28. f4 Rxg2 29. e5+ Ke7 30. Bxg2 1-0

[Event "Glorney Cup"]
[Site "Cardiff"]
[Date "2017.07.25"]
[Round "3.14"]
[White "D Costa, Leston"]
[Black "Afraoui, Anaelle"]
[Result "0-1"]
[ECO "A45"]
[WhiteElo "1689"]
[BlackElo "2017"]
[PlyCount "120"]
[EventDate "2017.07.24"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "WLS"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]
[WhiteTeam "Scotland"]
[BlackTeam "France"]
[WhiteTeamCountry "SCO"]
[BlackTeamCountry "FRA"]

1. d4 Nf6 2. Bg5 d5 3. Bxf6 exf6 4. e3 g6 5. g3 Bg7 6. Bg2 f5 7. Ne2 0-0 8. 0-0 c6 9. Nd2 Nd7 10. b3 Qe7 11. c4 dxc4 12. Nxc4 Nf6 13. Rc1 Ne4 14. Nc3 Rd8 15. Qc2 Nxc3 16. Qxc3 Be6 17. Rfd1 c5 18. Rd3 Rac8 19. Qd2 cxd4 20. exd4 b5 21. Na5 Rxc1+ 22. Qxc1 Rc8 23. Rc3 Rxc3 24. Qxc3 Qd6 25. Nc6 a6 26. Qe3 Bf6 27. Qd3 f4 28. d5 Bd7 29. Qc2 Kg7 30. b4 fxg3 31. hxg3 h5 32. Qc5 Qxc5 33. bxc5 Bxc6 34. dxc6 Bd8 35. Bf1 Kf6 36. a4 bxa4 37. Bxa6 Ke5 38. Bc4 f6 39. Kf1 Kd4 40. Bf7 a3 41. Ke2 Kc3 42. Ke3 Kb2 43. Kd4 g5 44. c7 Bxc7 45. c6 h4 46. gxh4 gxh4 47. Ke4 h3 48. Kf3 h2 49. Kg2 a2 50. Bxa2 Kxa2 51. Kh1 Kb3 52. Kg2 Kc4 53. Kh1 Kc5 54. Kg2 Kxc6 55. Kh1 Kd5 56. f4 Bxf4 57. Kg2 h1Q+ 58. Kxh1 Ke4 59. Kg1 Kf3 60. Kf1 f5 0-1

[Event "Glorney Cup"]
[Site "Cardiff"]
[Date "2017.07.25"]
[Round "4.14"]
[White "D Costa, Leston"]
[Black "Melaugh, Shanemelaugh"]
[Result "0-1"]
[ECO "A80"]
[WhiteElo "1689"]
[BlackElo "1928"]
[PlyCount "40"]
[EventDate "2017.07.24"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "WLS"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]
[WhiteTeam "Scotland"]
[BlackTeam "Ireland"]
[WhiteTeamCountry "SCO"]
[BlackTeamCountry "IRL"]

1. d4 f5 2. Bg5 h6 3. Bh4 g5 4. e4 Bg7 5. Bc4 e6 6. Qh5+ Kf8 7. Nf3 Nf6 8. Bxg5 hxg5 9. Qxg5 Rh5 10. Qe3 Nxe4 11. Nbd2 d5 12. Be2 Nc6 13. 0-0-0 Kg8 14. Nxe4 dxe4 15. Ne5 Bh6 16. Bxh5 Bxe3+ 17. fxe3 Qg5 18. Bf7+ Kf8 19. Nxc6 bxc6 20. Bxe6 Bxe6 0-1

[Event "Glorney Cup"]
[Site "Cardiff"]
[Date "2017.07.24"]
[Round "2.9"]
[White "Cocks, Elliot"]
[Black "D Costa, Leston"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "2036"]
[BlackElo "1689"]
[PlyCount "85"]
[EventDate "2017.07.24"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "WLS"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]
[WhiteTeam "England"]
[BlackTeam "Scotland"]
[WhiteTeamCountry "ENG"]
[BlackTeamCountry "SCO"]

1. d4 f5 2. Bg5 d5 3. c4 c6 4. e3 Nf6 5. Bxf6 exf6 6. Nc3 Be6 7. Qb3 b6 8. cxd5 cxd5 9. Bb5+ Kf7 10. Nge2 a6 11. Bd3 Bd6 12. Nxd5 Nc6 13. Nec3 Nb4 14. Bxf5 Bxf5 15. Nxb4+ Be6 16. d5 Bf5 17. Nc6 Qc7 18. h3 Rhc8 19. 0-0 g5 20. Nd4 Qd7 21. Nxf5 Qxf5 22. Qxb6 Rd8 23. Qd4 h5 24. e4 Qd7 25. Qd1 g4 26. g3 f5 27. Re1 Be5 28. Qd3 f4 29. h4 f3 30. Nd1 Qd6 31. Ne3 Bxg3 32. Nf5 Bxf2+ 33. Kxf2 Qf4 34. Ng3 Rab8 35. b3 Rbc8 36. Rad1 Rc5 37. Rd2 Rdc8 38. Qe3 Qf6 39. Qg5 Qb6 40. Qxh5+ Ke7 41. Nf5+ Kd7 42. Qf7+ Kd8 43. Qe7# 1-0

[Event "Glorney Cup"]
[Site "Cardiff"]
[Date "2017.07.24"]
[Round "1.14"]
[White "D Costa, Leston"]
[Black "Lutchman Singh, Karanvir"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "1689"]
[BlackElo "1603"]
[PlyCount "113"]
[EventDate "2017.07.24"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "WLS"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]
[WhiteTeam "Scotland"]
[BlackTeam "Wales"]
[WhiteTeamCountry "SCO"]
[BlackTeamCountry "WLS"]

1. d4 Nf6 2. Bg5 Ne4 3. Bf4 c5 4. f3 Nf6 5. d5 d6 6. e4 e5 7. Bc1 Be7 8. Nc3 Nbd7 9. Bd3 Nh5 10. Nge2 0-0 11. 0-0 Bg5 12. f4 exf4 13. Nxf4 Nxf4 14. Bxf4 Bxf4 15. Rxf4 Ne5 16. Qd2 Qg5 17. Qf2 Bg4 18. Qg3 h5 19. h3 h4 20. Rxg4 Nxg4 21. Qxg4 Qxg4 22. hxg4 a6 23. a4 g6 24. Rf1 Kg7 25. g5 Rh8 26. Rf6 Rad8 27. e5 dxe5 28. Bc4 Rh5 29. d6 Rd7 30. Ne4 b6 31. a5 b5 32. Nxc5 Ra7 33. d7 Rxd7 34. Nxd7 bxc4 35. Rxa6 Rxg5 36. Rc6 e4 37. Rc5 Rg3 38. a6 h3 39. a7 e3 40. a8Q Rxg2+ 41. Qxg2 hxg2 42. Kxg2 e2 43. Kf2 e1Q+ 44. Kxe1 c3 45. Rxc3 g5 46. b4 g4 47. b5 g3 48. Rxg3+ Kh7 49. b6 f5 50. b7 f4 51. Nf6+ Kh6 52. Rg1 f3 53. Ng4+ Kh5 54. b8Q f2+ 55. Kxf2 Kh4 56. Ne3 Kh3 57. Qg3# 1-0

[Event "Dundee & Angus op"]
[Site "Dundee"]
[Date "2016.10.09"]
[Round "4"]
[White "D'Costa, Leston"]
[Black "Rutherford, William"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1628"]
[BlackElo "1912"]
[PlyCount "74"]
[EventDate "2016.10.07"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4 h5 5. c4 e6 6. Nf3 Bg4 7. Nc3 Bb4 8. Bd2 dxc4 9. Ne4 Bxf3 10. gxf3 Be7 11. Bg5 f6 12. exf6 gxf6 13. Bf4 Qd5 14. b3 cxb3 15. axb3 Bb4+ 16. Bd2 Qxd4 17. Bxb4 Qxb4+ 18. Qd2 Qxd2+ 19. Kxd2 Ne7 20. Rg1 Nf5 21. Nxf6+ Kf7 22. Ne4 Nd7 23. Bh3 Nd4 24. Kd3 c5 25. Nd6+ Ke7 26. Nxb7 Ne5+ 27. Ke3 Nc2+ 28. Ke4 Nxa1 29. Kxe5 Nxb3 30. Bxe6 Kf8 31. Bxb3 Rb8 32. Nxc5 Rb5 33. Kd4 Rb4+ 34. Bc4 Rb2 35. Ne6+ Ke7 36. Ke5 Rb6 37. Rg7+ Ke8 0-1

[Event "Dundee & Angus op"]
[Site "Dundee"]
[Date "2016.10.09"]
[Round "5"]
[White "Dawson, Alastair G"]
[Black "D'Costa, Leston"]
[Result "1-0"]
[ECO "A04"]
[WhiteElo "1807"]
[BlackElo "1628"]
[PlyCount "75"]
[EventDate "2016.10.07"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 f5 2. g3 e6 3. Bg2 Nf6 4. 0-0 d5 5. d3 Bd6 6. Nbd2 0-0 7. e4 Nbd7 8. Qe2 Ng4 9. h3 dxe4 10. dxe4 Nge5 11. Kh2 f4 12. g4 Qf6 13. Nxe5 Nxe5 14. f3 Qh4 15. Qf2 Nxg4+ 16. fxg4 f3+ 17. Kg1 Qxf2+ 18. Rxf2 Bc5 19. Nxf3 Bd7 20. b4 Bb6 21. c4 Bxf2+ 22. Kxf2 Bc6 23. Ke3 Ba4 24. Bb2 Rad8 25. Ng5 Rfe8 26. e5 Bc2 27. Bf1 h6 28. Nf3 Kf7 29. Nd4 Ba4 30. Bd3 a6 31. Rf1+ Ke7 32. c5 Rd5 33. Ke4 Red8 34. Bc4 R5d7 35. Nxe6 Bc6+ 36. Ke3 Rg8 37. Nf4 Rgd8 38. Ng6+ 1-0

[Event "Dundee & Angus op"]
[Site "Dundee"]
[Date "2016.10.08"]
[Round "2"]
[White "D'Costa, Leston"]
[Black "Dabos Doukas, Ioannis"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "1628"]
[BlackElo "1786"]
[PlyCount "66"]
[EventDate "2016.10.07"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bb5 Nd4 6. 0-0 a6 7. Bd3 e6 8. e5 f5 9. Nxd4 cxd4 10. Ne2 d6 11. exd6 Qxd6 12. a4 Ne7 13. b3 0-0 14. Ba3 Qc7 15. Qe1 b6 16. Qg3 Kh8 17. Rae1 Re8 18. h4 Bb7 19. Bc4 Nd5 20. Bb2 e5 21. Bxd5 Bxd5 22. fxe5 Bxe5 23. Nf4 Rad8 24. Rxe5 Qxe5 25. Nxg6+ hxg6 26. Qxe5+ Rxe5 27. Bxd4 Kh7 28. Bxe5 Rc8 29. Bc3 Be4 30. Bd4 Rxc2 31. Bxb6 Rxd2 32. Rf2 Rxf2 33. Kxf2 Bc2 1/2-1/2

[Event "Dundee & Angus op"]
[Site "Dundee"]
[Date "2016.10.08"]
[Round "3"]
[White "Gray, Euan"]
[Black "D'Costa, Leston"]
[Result "0-1"]
[ECO "A80"]
[WhiteElo "1826"]
[BlackElo "1628"]
[PlyCount "44"]
[EventDate "2016.10.07"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 f5 2. Bg5 h6 3. Bh4 c5 4. e3 Qb6 5. b3 g5 6. Qh5+ Kd8 7. Bxg5 Nf6 8. Bxf6 Qxf6 9. c3 cxd4 10. exd4 Nc6 11. Nf3 e5 12. dxe5 Nxe5 13. Nd4 d5 14. Nd2 Bc5 15. Rd1 Re8 16. Bb5 Bd7 17. Bxd7 Nxd7+ 18. Kf1 Bxd4 19. cxd4 Qa6+ 20. Kg1 Qxa2 21. Qxf5 Qxd2 22. Qg4 Re1+ 0-1

[Event "Dundee & Angus op"]
[Site "Dundee"]
[Date "2016.10.07"]
[Round "1"]
[White "Marks, Ian Alexander"]
[Black "D'Costa, Leston"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "1900"]
[BlackElo "1628"]
[PlyCount "93"]
[EventDate "2016.10.07"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 f5 2. Nc3 Nf6 3. Bg5 e6 4. e4 Be7 5. exf5 exf5 6. Bd3 d6 7. Nf3 Be6 8. Qe2 Qd7 9. Bxf6 gxf6 10. d5 Bf7 11. Nd4 Bg6 12. 0-0-0 Kf7 13. Qf3 Na6 14. Bxf5 Bxf5 15. Nxf5 Rag8 16. Nh6+ Ke8 17. Qh5+ Rg6 18. Rhe1 Kf8 19. Re3 f5 20. Rg3 Qe8 21. Nxf5 Rxg3 22. Qxe8+ Kxe8 23. hxg3 Rf8 24. Nxe7 Kxe7 25. f3 Nc5 26. Rh1 Rf7 27. Kd2 Kf6 28. g4 Re7 29. Re1 Rxe1 30. Kxe1 Ke5 31. Kf2 Nd7 32. Ke3 h6 33. f4+ Kf6 34. Nb5 c6 35. dxc6 bxc6 36. Nxd6 Ke6 37. Ne4 c5 38. c4 a5 39. b3 Ke7 40. Kf3 Ke6 41. Kg3 Kf7 42. Kh4 Kg6 43. f5+ Kg7 44. g5 Kh7 45. g4 Kg7 46. gxh6+ Kxh6 47. g5+ 1-0

[Event "Glorney Cup"]
[Site "Daventry"]
[Date "2016.07.19"]
[Round "5.4"]
[White "D Costa, Leston"]
[Black "Boitel, Leo"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1557"]
[BlackElo "1995"]
[PlyCount "90"]
[EventDate "2016.07.17"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "ENG"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]
[WhiteTeam "Scotland"]
[BlackTeam "France"]
[WhiteTeamCountry "SCO"]
[BlackTeamCountry "FRA"]

1. e4 c5 2. Nc3 g6 3. f4 Bg7 4. Nf3 Nc6 5. Bb5 Nd4 6. 0-0 Nxb5 7. Nxb5 d5 8. exd5 a6 9. Nc3 Nf6 10. d4 c4 11. Ne5 Nxd5 12. Qf3 Nb4 13. Qf2 Bf5 14. Bd2 Nxc2 15. Rad1 Bd3 16. Be3 Nxe3 17. Qxe3 Bxf1 18. Rxf1 0-0 19. f5 e6 20. fxg6 fxg6 21. Nf3 Qb6 22. Na4 Qd6 23. Nc5 Rxf3 24. Qxf3 Bxd4+ 25. Kh1 Qxc5 26. Qf7+ Kh8 27. Qxe6 Rf8 28. Rxf8+ Qxf8 29. Qxc4 Qf2 30. Qc8+ Kg7 31. Qc7+ Kh6 32. Qc1+ Qe3 33. Qxe3+ Bxe3 34. g3 Kg5 35. Kg2 Kf5 36. Kf3 Bd4 37. b3 h5 38. h3 Ke5 39. g4 h4 40. Kg2 Ke4 41. Kh2 Kf3 42. a3 b5 43. a4 b4 44. a5 Be5+ 45. Kh1 Kg3 0-1

[Event "Glorney Cup"]
[Site "Daventry"]
[Date "2016.07.18"]
[Round "3.9"]
[White "D Costa, Leston"]
[Black "Cocks, Elliot"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1557"]
[BlackElo "1756"]
[PlyCount "70"]
[EventDate "2016.07.17"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "ENG"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]
[WhiteTeam "Scotland"]
[BlackTeam "England II"]
[WhiteTeamCountry "SCO"]
[BlackTeamCountry "ENG"]

1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bb5 Nd4 6. 0-0 e6 7. d3 Qa5 8. Bc4 b5 9. Bb3 Nxf3+ 10. Qxf3 c4 11. dxc4 bxc4 12. Ba4 Bd4+ 13. Kh1 Rb8 14. Ne2 Bg7 15. Qa3 Qb4 16. e5 Qxa3 17. bxa3 Ne7 18. Be3 Nd5 19. Bf2 g5 20. Rab1 Rxb1 21. Rxb1 gxf4 22. Rb8 0-0 23. Bc5 Bxe5 24. Ra8 d6 25. Bxa7 Ba6 26. Rxf8+ Kxf8 27. Bc6 Ne3 28. Be4 f5 29. Bxe3 fxe3 30. a4 fxe4 31. Kg1 d5 32. Kf1 d4 33. Ke1 d3 34. cxd3 exd3 35. Ng3 Bxg3+ 0-1

[Event "Glorney Cup"]
[Site "Daventry"]
[Date "2016.07.18"]
[Round "4.9"]
[White "Green, Michael"]
[Black "D Costa, Leston"]
[Result "1/2-1/2"]
[ECO "A04"]
[WhiteElo "1890"]
[BlackElo "1557"]
[PlyCount "81"]
[EventDate "2016.07.17"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "ENG"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]
[WhiteTeam "England"]
[BlackTeam "Scotland"]
[WhiteTeamCountry "ENG"]
[BlackTeamCountry "SCO"]

1. Nf3 f5 2. c4 e6 3. g3 Nf6 4. Bg2 d5 5. 0-0 Bd6 6. d3 0-0 7. Nbd2 c6 8. Rb1 f4 9. e3 fxe3 10. fxe3 Nbd7 11. b4 Ne5 12. Nxe5 Bxe5 13. Nf3 Bd6 14. Qb3 Qe7 15. Bd2 Bd7 16. Bc3 Be8 17. c5 Bc7 18. Ne5 Nd7 19. Qb2 Qg5 20. Rxf8+ Kxf8 21. Qf2+ Kg8 22. Nxd7 Bxd7 23. Rf1 Qf5 24. Qxf5 exf5 25. Bh3 Rf8 26. e4 dxe4 27. dxe4 g6 28. e5 Re8 29. Re1 Re7 30. Bf1 Kf7 31. a4 a6 32. Kf2 g5 33. Kf3 Be6 34. b5 axb5 35. axb5 Bd5+ 36. Kf2 Ke6 37. b6 Bb8 38. Bd3 Be4 39. Bc4+ Bd5 40. Bd3 h5 41. Bd2 1/2-1/2

[Event "Glorney Cup"]
[Site "Daventry"]
[Date "2016.07.17"]
[Round "2.14"]
[White "Beatty, Ross"]
[Black "D Costa, Leston"]
[Result "0-1"]
[ECO "A04"]
[WhiteElo "1770"]
[BlackElo "1557"]
[PlyCount "66"]
[EventDate "2016.07.17"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "ENG"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Scotland"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "SCO"]

1. Nf3 f5 2. g3 e6 3. Bg2 Nf6 4. 0-0 d5 5. d3 Bd6 6. Nbd2 0-0 7. c4 c6 8. Qc2 f4 9. c5 Bc7 10. d4 Qe7 11. b4 Nbd7 12. Bb2 e5 13. dxe5 Nxe5 14. gxf4 Nxf3+ 15. Nxf3 Bxf4 16. a4 Bg4 17. Ra3 Bxf3 18. Bxf3 Ne4 19. Bxe4 dxe4 20. Qc4+ Kh8 21. Kh1 Qh4 22. h3 Rae8 23. Rg1 Re7 24. Rg2 Qh6 25. e3 Qxh3+ 26. Kg1 Be5 27. Bxe5 Rxe5 28. Qd4 Qh5 29. b5 Rg8 30. Rh2 Rg5+ 31. Rg2 Rd5 32. Rh2 Qg6+ 33. Rg2 Rxd4 0-1

[Event "Glorney Cup"]
[Site "Daventry"]
[Date "2016.07.17"]
[Round "1.4"]
[White "Smith, George1111"]
[Black "D Costa, Leston"]
[Result "0-1"]
[ECO "A80"]
[BlackElo "1557"]
[PlyCount "144"]
[EventDate "2016.07.17"]
[EventType "team-tourn"]
[EventRounds "5"]
[EventCountry "ENG"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]
[WhiteTeam "Wales"]
[BlackTeam "Scotland"]
[WhiteTeamCountry "WLS"]
[BlackTeamCountry "SCO"]

1. d4 f5 2. g4 e6 3. Nc3 d5 4. gxf5 exf5 5. Nf3 Nf6 6. Bg5 Be6 7. Qd3 c6 8. 0-0-0 Nbd7 9. Bh3 g6 10. Ne5 Be7 11. f3 Qc7 12. Nxd7 Qxd7 13. Bg2 0-0-0 14. Na4 Rhf8 15. Bd2 Qc7 16. h3 Nd7 17. e4 dxe4 18. fxe4 Nc5 19. Nxc5 Bxc5 20. Bc3 fxe4 21. Qxe4 Bf5 22. Qh4 Bb6 23. Rhe1 Rfe8 24. Bf1 Ba5 25. Bd2 Bxd2+ 26. Rxd2 Rxe1+ 27. Qxe1 Qa5 28. Kb1 Rxd4 29. Rd1 Qxe1 30. Rxe1 Re4 31. Rd1 Rh4 32. Bg2 Bxh3 33. Rh1 Bxg2 34. Rxh4 h5 35. Kc1 Kd7 36. Kd2 Ke6 37. Ke2 Kf5 38. Kf2 Bd5 39. a3 Bf7 40. Rd4 Be6 41. Rh4 Kg5 42. Re4 Bf5 43. Re7 b5 44. Rxa7 Bxc2 45. Rd7 Be4 46. Rd4 Kf5 47. Ke3 Bd5 48. Rh4 Kg5 49. Rd4 h4 50. Kf2 Kh5 51. Kg1 g5 52. Kh2 g4 53. Rf4 Kg5 54. Rf8 g3+ 55. Kg1 h3 56. Rh8 h2+ 57. Rxh2 gxh2+ 58. Kxh2 Kf4 59. Kg1 Ke3 60. Kf1 Kd2 61. b4 Kc3 62. Ke1 Kb3 63. Kd1 Kxa3 64. Kc1 Kxb4 65. Kb2 c5 66. Ka1 Kc3 67. Kb1 b4 68. Ka1 b3 69. Kb1 Be4+ 70. Ka1 b2+ 71. Ka2 b1Q+ 72. Ka3 Qa1# 0-1

[Event "SCO-ch 123rd"]
[Site "Glasgow"]
[Date "2016.07.16"]
[Round "8"]
[White "D Costa, Leston"]
[Black "Parks, Joseph"]
[Result "1/2-1/2"]
[ECO "C41"]
[WhiteElo "1557"]
[BlackElo "1906"]
[PlyCount "38"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. Nf3 Nbd7 5. Bc4 Be7 6. 0-0 0-0 7. a4 c6 8. b3 Nb6 9. Be2 Bg4 10. dxe5 Bxf3 11. Bxf3 dxe5 12. Bb2 Qc7 13. Qe2 Rad8 14. Rad1 Nbd7 15. Nb1 Nc5 16. Nd2 Nfd7 17. Bg4 Nf6 18. Bf3 Nfd7 19. Bg4 Nf6 1/2-1/2

[Event "SCO-ch 123rd"]
[Site "Glasgow"]
[Date "2016.07.15"]
[Round "7"]
[White "Brown, Alan M"]
[Black "D Costa, Leston"]
[Result "0-1"]
[ECO "A90"]
[WhiteElo "2018"]
[BlackElo "1557"]
[PlyCount "54"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. d4 f5 2. Nf3 e6 3. g3 Nf6 4. Bg2 d5 5. 0-0 Bd6 6. b3 0-0 7. c4 c6 8. Ba3 Ne4 9. Bxd6 Qxd6 10. c5 Qe7 11. Ne5 Nd7 12. Nxd7 Bxd7 13. f4 Be8 14. e3 Rf6 15. Na3 Rh6 16. Bf3 Bg6 17. Kg2 Qf7 18. h3 Bh5 19. g4 fxg4 20. hxg4 Qg6 21. Rg1 Nc3 22. Qc2 Bxg4 23. Qxc3 Rh3 24. Raf1 Qh5 25. Bxg4 Qxg4+ 26. Kf2 Rh2+ 27. Ke1 Qe2# 0-1

[Event "SCO-ch 123rd"]
[Site "Glasgow"]
[Date "2016.07.14"]
[Round "6"]
[White "D Costa, Leston"]
[Black "Heron, Donald"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "1557"]
[BlackElo "1778"]
[PlyCount "67"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 e6 2. Qe2 c5 3. f4 Nc6 4. Nf3 g6 5. Nc3 Bg7 6. g3 Nd4 7. Nxd4 cxd4 8. Nd1 Ne7 9. Bg2 0-0 10. 0-0 d6 11. Nf2 Bd7 12. b3 Rc8 13. d3 Qc7 14. Ba3 Bc6 15. Rac1 Rfd8 16. Bb2 Qa5 17. a4 Be8 18. g4 Rc7 19. Nh3 Rdc8 20. Ba3 Qa6 21. f5 gxf5 22. exf5 Be5 23. fxe6 f6 24. Be4 Bg6 25. Nf4 b5 26. Bxg6 hxg6 27. Qe4 Kg7 28. Bb2 Rxc2 29. Rxc2 Rxc2 30. Bxd4 bxa4 31. g5 axb3 32. gxf6+ Kxf6 33. Nxg6+ Kxe6 34. Qg4+ 1-0

[Event "SCO-ch 123rd"]
[Site "Glasgow"]
[Date "2016.07.13"]
[Round "5"]
[White "Reid, Caitlin"]
[Black "D Costa, Leston"]
[Result "0-1"]
[ECO "A80"]
[WhiteElo "1471"]
[BlackElo "1557"]
[PlyCount "76"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. d4 f5 2. Bg5 h6 3. Bh4 c5 4. e3 Qb6 5. dxc5 Qb4+ 6. Nc3 Qxh4 7. Nf3 Qb4 8. Bd3 d6 9. cxd6 Qxd6 10. Nb5 Qb6 11. Ne5 Nf6 12. Bc4 e6 13. c3 Bd7 14. a4 a6 15. Nd4 Bc5 16. Ng6 Rg8 17. 0-0 Bxd4 18. exd4 Nc6 19. b4 Ne7 20. Ne5 0-0-0 21. Re1 g5 22. Nxd7 Nxd7 23. Rxe6 Qc7 24. Qe2 Rge8 25. Re1 Nf8 26. Re5 Nfg6 27. Rc5 Nc6 28. Be6+ Kb8 29. b5 Nf4 30. Qa2 Nxe6 31. Rxe6 Rxe6 32. bxc6 Qf7 33. c7+ Ka7 34. h3 Re1+ 35. Kh2 Qxa2 36. cxd8Q Qxf2 37. Qd6 Qg1+ 38. Kg3 Re3# 0-1

[Event "SCO-ch 123rd"]
[Site "Glasgow"]
[Date "2016.07.12"]
[Round "4"]
[White "D Costa, Leston"]
[Black "McCormack, Derek"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "1557"]
[BlackElo "1703"]
[PlyCount "70"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 a6 3. f4 b5 4. g3 Bb7 5. Bg2 e6 6. d3 d5 7. Qe2 Nc6 8. Nf3 Nd4 9. Nxd4 cxd4 10. Nd1 Rc8 11. 0-0 dxe4 12. Bxe4 Bxe4 13. dxe4 Qb6 14. Nf2 Be7 15. Bd2 Nf6 16. c3 Bc5 17. b4 d3 18. Qf3 Bxf2+ 19. Rxf2 Rc4 20. Re1 0-0 21. Be3 Qd8 22. Bd4 Rxd4 23. cxd4 Qxd4 24. Rd1 Nxe4 25. Rxd3 Qxf2+ 26. Qxf2 Nxf2 27. Kxf2 g6 28. Rd6 Ra8 29. Ke3 a5 30. bxa5 Rxa5 31. Rd2 Ra4 32. Kd3 Kg7 33. Kc3 Kf6 34. Kb3 Ke7 35. Rc2 Kd6 1/2-1/2

[Event "SCO-ch 123rd"]
[Site "Glasgow"]
[Date "2016.07.11"]
[Round "3"]
[White "Smith, Callum"]
[Black "D Costa, Leston"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "1665"]
[BlackElo "1557"]
[PlyCount "105"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 Bg4 6. Nbd2 Nc6 7. Bc4 Bxf3 8. Qb3 Na5 9. Qb5+ Qd7 10. Nxf3 Nxc4 11. Qxc4 cxd4 12. Nxd4 e6 13. Bg5 Be7 14. 0-0-0 Rc8 15. Qb3 Nd5 16. Bxe7 Qxe7 17. Kb1 0-0 18. Rhe1 Qg5 19. g3 b5 20. f4 Qf6 21. Re5 Rc5 22. Rde1 Rfc8 23. Nxb5 Rb8 24. c4 a6 25. Rc1 Qg6+ 26. Qc2 axb5 27. Qxg6 hxg6 28. cxd5 Rxd5 29. Rxd5 exd5 30. Rc7 Re8 31. Rd7 Re1+ 32. Kc2 Re2+ 33. Kb3 Re3+ 34. Kb4 Re2 35. Ka3 Rxh2 36. Rxd5 Rh5 37. Rd8+ Kh7 38. Kb4 g5 39. Rd5 Kg6 40. Rxg5+ Rxg5 41. fxg5 Kxg5 42. Kxb5 f5 43. a4 Kg4 44. a5 Kxg3 45. a6 f4 46. a7 f3 47. a8Q f2 48. Qb8+ Kg2 49. Qb7+ Kh2 50. Qc7+ Kg2 51. Qxg7+ Kh2 52. Qf6 Kg2 53. Kc5 1-0

[Event "SCO-ch 123rd"]
[Site "Glasgow"]
[Date "2016.07.10"]
[Round "2"]
[White "Thomas, Philip"]
[Black "D Costa, Leston"]
[Result "1/2-1/2"]
[ECO "B34"]
[WhiteElo "1811"]
[BlackElo "1557"]
[PlyCount "62"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. Nc3 c5 2. e4 Nc6 3. Nf3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Be3 Nf6 7. Qd2 0-0 8. f3 d5 9. Nxc6 bxc6 10. Rd1 Bb7 11. Be2 Qa5 12. e5 Nd7 13. f4 Rfd8 14. b4 Qc7 15. 0-0 a6 16. Bg4 e6 17. Qf2 Bf8 18. Rb1 c5 19. bxc5 Nxc5 20. h4 Qc6 21. Bf3 Rab8 22. Kh2 Na4 23. Nxa4 Qxa4 24. Ba7 Qxf4+ 25. Qg3 Qc4 26. Bxb8 Rxb8 27. Qf2 Qc7 28. Qe2 Rc8 29. h5 Bc5 30. hxg6 hxg6 31. c3 Bc6 1/2-1/2

[Event "SCO-ch 123rd"]
[Site "Glasgow"]
[Date "2016.07.09"]
[Round "1"]
[White "D Costa, Leston"]
[Black "Newton, Andrew"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1557"]
[BlackElo "1828"]
[PlyCount "48"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e5 3. f4 exf4 4. Nf3 Nc6 5. Bb5 g5 6. h3 h6 7. d4 cxd4 8. Nxd4 Qf6 9. Nf5 Qe5 10. Qd3 Nf6 11. Bd2 Nb4 12. Qe2 Nxc2+ 13. Kf2 Nxa1 14. Rxa1 Bc5+ 15. Kf1 a6 16. Bc4 d6 17. Ng7+ Kf8 18. Nh5 Qd4 19. Be3 fxe3 20. Rd1 Nxh5 21. Qxh5 Qxc4+ 22. Ne2 Qxe4 23. Kg1 Bf5 24. Rf1 Bg6 0-1

[Event "Dundee & Angus Challengers"]
[Site "Dundee"]
[Date "2015.10.11"]
[Round "?"]
[White "D'Costa, Leston"]
[Black "Barker, Luke"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "1515"]
[BlackElo "1714"]
[PlyCount "100"]
[EventDate "2015.10.09"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bb5 a6 6. Bxc6 bxc6 7. 0-0 Nf6 8. d3 0-0 9. Qe1 d6 10. Qh4 Nh5 11. f5 e6 12. Bg5 Bf6 13. fxg6 fxg6 14. g4 Nf4 15. Bxf6 Qxf6 16. Ng5 Qxg5 17. Qxg5 Nh3+ 18. Kg2 Nxg5 19. Rxf8+ Kxf8 20. Rf1+ Kg7 21. h4 Nf7 22. g5 a5 23. Kg3 Ba6 24. b3 Rf8 25. Rf6 Nd8 26. e5 dxe5 27. Ne4 Bc8 28. Nd6 Ba6 29. Ne4 Rxf6 30. Nxf6 Nf7 31. Nd7 h6 32. Nxc5 Bc8 33. Kg4 hxg5 34. hxg5 Kf8 35. Na4 Ke7 36. Nb6 Ba6 37. a3 Kd6 38. b4 axb4 39. axb4 e4 40. dxe4 Ke5 41. Nd7+ Kxe4 42. Nc5+ Kd4 43. Nxa6 e5 44. Nb8 Kd5 45. c4+ Kxc4 46. Nxc6 Kb5 47. Ne7 Kxb4 48. Nxg6 e4 49. Nf4 Kc3 50. g6 Ne5+ 1/2-1/2

[Event "Dundee & Angus Challengers"]
[Site "Dundee"]
[Date "2015.10.11"]
[Round "4"]
[White "Pasha, Tariq"]
[Black "D'Costa, Leston"]
[Result "1/2-1/2"]
[ECO "A94"]
[WhiteElo "1654"]
[BlackElo "1515"]
[PlyCount "92"]
[EventDate "2015.10.09"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 f5 2. c4 Nf6 3. Nf3 e6 4. g3 d5 5. Bg2 c6 6. 0-0 Be7 7. b3 0-0 8. Ba3 Ne4 9. Bxe7 Qxe7 10. Qc2 Nd7 11. Nc3 b6 12. Rfe1 Bb7 13. Nd2 Qg5 14. e3 Rad8 15. Rad1 h5 16. Nf3 Qf6 17. h4 g5 18. Nxe4 fxe4 19. Nxg5 Qg6 20. Bh3 Rf6 21. Qe2 Nf8 22. g4 hxg4 23. Qxg4 Bc8 24. Qg3 Rd7 25. Kh2 Rg7 26. Rg1 Qh6 27. Rdf1 Nh7 28. Qb8 Rf8 29. Nxh7 Kxh7 30. Rxg7+ Qxg7 31. Qg3 Qf6 32. Qg4 Rg8 33. Qh5+ Qh6 34. Qxh6+ Kxh6 35. cxd5 exd5 36. Bxc8 Rxc8 37. f3 Kh5 38. fxe4 dxe4 39. Rf4 c5 40. Rxe4 cxd4 41. exd4 Rc2+ 42. Kh3 Rxa2 43. Re5+ Kg6 44. d5 Kf6 45. Re6+ Kf7 46. Re3 Rd2 1/2-1/2

[Event "Dundee & Angus Challengers"]
[Site "Dundee"]
[Date "2015.10.10"]
[Round "2"]
[White "D'Costa, Leston"]
[Black "Thomas, Philip"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "1515"]
[BlackElo "1809"]
[PlyCount "55"]
[EventDate "2015.10.09"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 d6 4. Nf3 e5 5. Bb5 Bg4 6. fxe5 dxe5 7. Bxc6+ bxc6 8. 0-0 Qc7 9. Qe1 Nf6 10. Qg3 Bxf3 11. Rxf3 Nh5 12. Qg5 Nf4 13. d3 Ne6 14. Qg3 f6 15. Be3 0-0-0 16. Rff1 Kb7 17. Rfb1 Nd4 18. Qf2 Qa5 19. a3 Qa6 20. b4 Kc8 21. b5 cxb5 22. Bxd4 cxd4 23. Qf5+ Rd7 24. Nxb5 g6 25. Qg4 Qa4 26. Qe6 Bg7 27. Rb4 Qa5 28. Nd6+ 1-0

[Event "Dundee & Angus Challengers"]
[Site "Dundee"]
[Date "2015.10.10"]
[Round "3"]
[White "D'Costa, Leston"]
[Black "Ward, Andrew"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "1515"]
[BlackElo "1400"]
[PlyCount "51"]
[EventDate "2015.10.09"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e6 2. Qe2 Nc6 3. f4 d5 4. exd5 Qxd5 5. Nc3 Qa5 6. g3 Bd7 7. Bg2 0-0-0 8. Nf3 Nb4 9. d3 Nd5 10. Bd2 Bb4 11. Nxd5 Bxd2+ 12. Qxd2 Qxd2+ 13. Kxd2 exd5 14. Ng5 Be6 15. f5 h6 16. Nxe6 fxe6 17. fxe6 Ne7 18. Rhf1 Rhf8 19. Rae1 c6 20. Rf7 Nf5 21. Rf1 Rxf7 22. exf7 g6 23. g4 Nh4 24. f8Q Rxf8 25. Rxf8+ Kd7 26. Bh1 1-0

[Event "Dundee & Angus Challengers"]
[Site "Dundee"]
[Date "2015.10.09"]
[Round "1"]
[White "Irving, Neil"]
[Black "D'Costa, Leston"]
[Result "1/2-1/2"]
[ECO "A90"]
[WhiteElo "1748"]
[BlackElo "1515"]
[PlyCount "65"]
[EventDate "2015.10.09"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 f5 2. d4 Nf6 3. g3 e6 4. Bg2 d5 5. 0-0 c6 6. c4 Bd6 7. b3 Qe7 8. Nbd2 Nbd7 9. Bb2 0-0 10. Ne5 Ne4 11. f3 Nxe5 12. Nxe4 fxe4 13. dxe5 Bc5+ 14. Bd4 exf3 15. Rxf3 Bd7 16. Kh1 Rxf3 17. exf3 Bxd4 18. Qxd4 c5 19. Qd3 d4 20. f4 Rb8 21. Be4 g6 22. Qf3 b6 23. Re1 Rf8 24. Qg4 Bc8 25. Kg1 Qf7 26. h4 Kh8 27. Re2 Bd7 28. Rh2 Be8 29. Qg5 Qd7 30. Bd3 Qf7 31. Qh6 Qg7 32. Qg5 Qf7 33. Qh6 1/2-1/2

[Event "SCO-ch 122nd"]
[Site "Edinburgh"]
[Date "2015.07.19"]
[Round "9"]
[White "D'Costa, Leston"]
[Black "Oxener, Aldo"]
[Result "1/2-1/2"]
[ECO "B23"]
[BlackElo "1545"]
[PlyCount "167"]
[EventDate "2015.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. f4 a6 4. g3 b5 5. Bg2 Bb7 6. d3 Nf6 7. Qe2 Nc6 8. Nf3 e6 9. 0-0 Be7 10. Bd2 0-0 11. Rae1 Rc8 12. a4 Nd4 13. Qd1 b4 14. Ne2 a5 15. Nexd4 cxd4 16. Nxd4 Rc5 17. Be3 Rc8 18. Qe2 Qd7 19. b3 Rc3 20. Nb5 Rcc8 21. Rc1 Ba6 22. c4 bxc3 23. Nxc3 Rb8 24. Rb1 Rfc8 25. Rfc1 Rb4 26. Na2 Rxc1+ 27. Bxc1 Rd4 28. Qf2 Rxd3 29. Bf1 Rd1 30. Kg2 Rxf1 31. Qb6 Bd3 32. Rb2 Rd1 33. Bd2 Bd8 34. Qb8 Bxe4+ 35. Kf2 Ng4+ 36. Ke2 Rh1 37. Nc3 Rxh2+ 38. Ke1 Bd3 39. Qa8 Rf2 40. Bc1 Rxb2 41. Bxb2 Qc7 42. Qf3 Bf5 43. Ba3 Qb6 44. Nd1 Qg1+ 45. Ke2 Qh2+ 46. Ke1 Qg1+ 47. Ke2 Qd4 48. Bb2 Qe4+ 49. Qxe4 Bxe4 50. Nc3 Bc2 51. Nb5 d5 52. Nd4 Bb1 53. Bc3 Ba2 54. Kd2 Bb1 55. Nc6 Bc7 56. Bxa5 Bxa5+ 57. Nxa5 e5 58. Nc6 e4 59. Ne7+ Kf8 60. Nxd5 Ke8 61. b4 Kd7 62. Nc3 Bd3 63. b5 Kc7 64. a5 Nf6 65. Ke3 Kb7 66. f5 g6 67. Kf4 Nh5+ 68. Kg4 e3 69. fxg6 hxg6 70. a6+ Ka7 71. Nd5 e2 72. b6+ Kxa6 73. Nb4+ Kxb6 74. Nxd3 Kc6 75. Kf3 e1Q 76. Nxe1 Kd5 77. g4 Ng7 78. g5 Ke5 79. Kg4 Nf5 80. Nf3+ Ke4 81. Nd2+ Ke5 82. Nf3+ Ke6 83. Kf4 Kd5 84. Ne5 1/2-1/2

[Event "SCO-ch 122nd"]
[Site "Edinburgh"]
[Date "2015.07.18"]
[Round "8"]
[White "Campbell, Eoin S"]
[Black "D'Costa, Leston"]
[Result "1-0"]
[ECO "A83"]
[WhiteElo "1839"]
[PlyCount "83"]
[EventDate "2015.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. d4 f5 2. Nc3 Nf6 3. Bg5 e6 4. e4 fxe4 5. Nxe4 Be7 6. Bxf6 Bxf6 7. Nf3 0-0 8. Bd3 Nc6 9. c3 b6 10. Qc2 h6 11. 0-0-0 a5 12. h4 Ba6 13. Bxa6 Rxa6 14. Kb1 d5 15. Neg5 hxg5 16. hxg5 Kf7 17. gxf6 Qxf6 18. Qa4 b5 19. Qxb5 Rb6 20. Qe2 Rfb8 21. b3 a4 22. b4 Na5 23. Ne5+ Ke7 24. Rh7 Nc4 25. Nxc4 dxc4 26. Qxc4 R8b7 27. Rdh1 Qg6+ 28. Ka1 Qxg2 29. Qc5+ Kf7 30. Qh5+ Kf6 31. Rh8 Rb8 32. Qe5+ Kg6 33. R8h3 Kf7 34. Qxc7+ Kf6 35. Rh4 R8b7 36. Qf4+ Ke7 37. R4h2 Qg6 38. Rh8 a3 39. Qf8+ Kd7 40. Qc8+ Ke7 41. Qd8+ Kf7 42. Rf8# 1-0

[Event "SCO-ch 122nd"]
[Site "Edinburgh"]
[Date "2015.07.17"]
[Round "7"]
[White "D'Costa, Leston"]
[Black "Aitchison, A Keith"]
[Result "0-1"]
[ECO "D00"]
[BlackElo "1837"]
[PlyCount "96"]
[EventDate "2015.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. f4 d5 2. Nf3 c5 3. e3 Nc6 4. d4 Bg4 5. c3 e6 6. Bd3 Nf6 7. 0-0 Bd6 8. Nbd2 Rc8 9. Qe1 cxd4 10. Nxd4 Nxd4 11. exd4 0-0 12. Nf3 Bf5 13. Qe2 Bxd3 14. Qxd3 Ne4 15. Nd2 f5 16. Nxe4 fxe4 17. Qh3 Rf5 18. Be3 Qc7 19. Rf2 Rcf8 20. Raf1 b5 21. g4 R5f6 22. f5 exf5 23. Rxf5 Rxf5 24. gxf5 Be7 25. Qg4 Bf6 26. Bg5 Qe7 27. h4 Kh8 28. Kf2 g6 29. Ke3 Bxg5+ 30. hxg5 Qd7 31. Qf4 Rxf5 32. Qb8+ Kg7 33. Rxf5 gxf5 34. Qe5+ Kg8 35. Kf4 a6 36. Qf6 Qc7+ 37. Kxf5 Qf7 38. Kf4 Qxf6+ 39. gxf6 Kf7 40. b3 Kxf6 41. c4 dxc4 42. bxc4 bxc4 43. Kxe4 h5 44. d5 h4 45. Kd4 h3 46. Kxc4 h2 47. d6 Ke6 48. Kc5 h1Q 0-1

[Event "SCO-ch 122nd"]
[Site "Edinburgh"]
[Date "2015.07.16"]
[Round "6"]
[White "Pannwitz, Kai"]
[Black "D'Costa, Leston"]
[Result "0-1"]
[ECO "A90"]
[WhiteElo "1797"]
[PlyCount "100"]
[EventDate "2015.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 e6 4. Qc2 f5 5. g3 Nf6 6. Bg2 Bd6 7. Bf4 0-0 8. Bxd6 Qxd6 9. 0-0 Nbd7 10. Rd1 Ne4 11. Nbd2 b6 12. Rab1 a5 13. e3 a4 14. b3 a3 15. b4 Ba6 16. c5 Qc7 17. Ne1 Ndf6 18. h3 g5 19. Nd3 h5 20. Nf3 g4 21. Nfe5 gxh3 22. Bxh3 Ng4 23. Bxg4 fxg4 24. Nf4 Bb5 25. Qc1 Rf6 26. Kg2 Raf8 27. Rh1 Rf5 28. cxb6 Qb7 29. Rb3 Be2 30. Rxa3 Bf3+ 31. Nxf3 gxf3+ 32. Kxf3 Qxb6 33. Rb3 Qc7 34. b5 c5 35. dxc5 e5 36. b6 Qc6 37. Ke2 exf4 38. gxf4 Nxc5 39. b7 Qa6+ 40. Kf3 Nxb3 41. Rg1+ Kh7 42. Qc7+ R5f7 43. Qxf7+ Rxf7 44. b8Q Nd2+ 45. Kg2 Rg7+ 46. Kh1 Rxg1+ 47. Kxg1 Qf1+ 48. Kh2 Nf3+ 49. Kg3 Qg1+ 50. Kxf3 Qg4# 0-1

[Event "SCO-ch 122nd"]
[Site "Edinburgh"]
[Date "2015.07.15"]
[Round "5"]
[White "D'Costa, Leston"]
[Black "Hartman, James"]
[Result "1-0"]
[ECO "C47"]
[PlyCount "73"]
[EventDate "2015.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 dxc6 7. Bd3 0-0 8. 0-0 Re8 9. Bg5 Qd6 10. h3 Bxc3 11. bxc3 Nxe4 12. Re1 Bf5 13. Qf3 Qd5 14. Bf4 Re7 15. Rad1 Rae8 16. Bxe4 Bxe4 17. Qe3 Qe6 18. Qxa7 Qc8 19. Rc1 b6 20. Qa3 Qd7 21. Rcd1 Qe6 22. f3 Qf5 23. Qxe7 Qc5+ 24. Qxc5 bxc5 25. Rxe4 Kf8 26. Rxe8+ Kxe8 27. Bxc7 Ke7 28. Bd6+ Ke6 29. Bxc5 g6 30. Rd6+ Ke5 31. g4 g5 32. Kf2 f6 33. Ke3 f5 34. gxf5 Kxf5 35. Bd4 g4 36. h4 gxf3 37. Kxf3 1-0

[Event "SCO-ch 122nd"]
[Site "Edinburgh"]
[Date "2015.07.14"]
[Round "4"]
[White "MacGilchrist, Siegrun"]
[Black "D'Costa, Leston"]
[Result "1-0"]
[ECO "A85"]
[WhiteElo "1746"]
[PlyCount "97"]
[EventDate "2015.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. c4 f5 2. d4 e6 3. Nf3 Nf6 4. Nc3 d5 5. Bg5 c6 6. e3 Bd6 7. c5 Bc7 8. Be2 0-0 9. 0-0 Nbd7 10. b4 a6 11. g3 e5 12. Nh4 g6 13. a4 Qe8 14. Ra3 Ne4 15. Bh6 Nxc3 16. Rxc3 Rf7 17. Nf3 Nf6 18. dxe5 Bxe5 19. Nxe5 Qxe5 20. Qd4 Qxd4 21. exd4 Re7 22. Bd1 Bd7 23. Bg5 Kf7 24. Re3 Re4 25. Rxe4 Nxe4 26. Bf4 Re8 27. Be5 Nd2 28. Re1 Nc4 29. f4 Nxe5 30. fxe5 Ke6 31. g4 f4 32. h4 h6 33. g5 h5 34. Bc2 Rf8 35. Bxg6 Be8 36. Bxe8 Rxe8 37. Kf2 Kf5 38. Kf3 Re6 39. Rg1 Rg6 40. Rb1 Re6 41. b5 axb5 42. axb5 Re8 43. bxc6 bxc6 44. Rb7 Ra8 45. Rf7+ Ke6 46. Rf6+ Kd7 47. Kxf4 Ra1 48. g6 Rf1+ 49. Kg5 1-0

[Event "SCO-ch 122nd"]
[Site "Edinburgh"]
[Date "2015.07.13"]
[Round "3"]
[White "D'Costa, Leston"]
[Black "Durno, Joy"]
[Result "0-1"]
[ECO "B23"]
[BlackElo "1886"]
[PlyCount "128"]
[EventDate "2015.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bb5 Nd4 6. 0-0 Nxb5 7. Nxb5 d5 8. exd5 a6 9. Nc3 Nf6 10. d4 c4 11. Ne5 b5 12. Nc6 Qd7 13. Re1 Bf8 14. Qf3 Bb7 15. Ne5 Qd6 16. a3 Bxd5 17. Nxd5 Qxd5 18. Qxd5 Nxd5 19. Bd2 Rc8 20. c3 f6 21. Ng4 Kf7 22. a4 h5 23. Ne3 Nxf4 24. axb5 axb5 25. Ra5 Nd3 26. Rb1 Rb8 27. Nd5 Rb7 28. b3 e6 29. Ne3 cxb3 30. Rxb3 Rc7 31. Raxb5 Bh6 32. Rb7 Rhc8 33. Nc4 Bf8 34. g3 g5 35. Na5 Rxb7 36. Rxb7+ Kg6 37. Rb3 Ra8 38. c4 Nc1 39. Bxc1 Rxa5 40. Bb2 Ra4 41. c5 Rc4 42. Rb6 e5 43. Ra6 exd4 44. c6 Bd6 45. Kf1 Be5 46. Rb6 Kf5 47. Rb5 Ke4 48. Rb6 Bc7 49. Ra6 Rc2 50. Ba3 Kf3 51. Ra4 Be5 52. Rb4 Rxc6 53. Rb1 Rc2 54. Kg1 Kg4 55. Re1 Kh3 56. Bc1 Rg2+ 57. Kf1 Rxh2 58. Kg1 Rg2+ 59. Kf1 Rxg3 60. Kf2 Rc3 61. Rh1+ Kg4 62. Rg1+ Kf5 63. Ke2 Bf4 64. Rf1 Rxc1 0-1

[Event "SCO-ch 122nd"]
[Site "Edinburgh"]
[Date "2015.07.12"]
[Round "2"]
[White "Stuthi, Hedge"]
[Black "D'Costa, Leston"]
[Result "0-1"]
[ECO "A84"]
[PlyCount "42"]
[EventDate "2015.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. d4 e6 2. c4 f5 3. Nc3 Nf6 4. Bf4 d5 5. e3 c6 6. Nf3 Bd6 7. Bxd6 Qxd6 8. Ne5 0-0 9. Be2 Nbd7 10. Nxd7 Bxd7 11. cxd5 exd5 12. Rc1 Rae8 13. a3 f4 14. Qd3 fxe3 15. fxe3 Ng4 16. Bxg4 Bxg4 17. Nd1 Qf4 18. Kd2 Qg5 19. h3 Bxd1 20. Rcxd1 Rf2+ 21. Ke1 Qxg2 0-1

[Event "SCO-ch 122nd"]
[Site "Edinburgh"]
[Date "2015.07.11"]
[Round "1"]
[White "D'Costa, Leston"]
[Black "Milton, Carl"]
[Result "0-1"]
[ECO "B23"]
[BlackElo "1777"]
[PlyCount "66"]
[EventDate "2015.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SCO"]
[SourceTitle "CBM 167 Extra"]
[Source "ChessBase"]
[SourceDate "2015.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2015.09.14"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. f4 g6 4. Nf3 Bg7 5. Bb5+ Bd7 6. Bc4 e6 7. 0-0 Nc6 8. d3 Nge7 9. Qe1 0-0 10. Qh4 Nd4 11. Nxd4 Bxd4+ 12. Kh1 a6 13. f5 b5 14. Bb3 gxf5 15. Bg5 f6 16. Bh6 Rf7 17. Qg3+ Kh8 18. exf5 d5 19. fxe6 Bxe6 20. a3 Nf5 21. Qf4 Nxh6 22. Qxh6 c4 23. Ba2 Qd7 24. Rae1 Rg8 25. dxc4 Bxc3 26. bxc3 dxc4 27. Rxf6 Bd5 28. h3 Rxg2 29. Rxf7 Rxc2+ 30. Kg1 Rg2+ 31. Kh1 Rxa2+ 32. Kg1 Rg2+ 33. Kh1 Qxf7 0-1

[Event "Dundee & Angus op Major"]
[Site "Dundee"]
[Date "2014.10.12"]
[Round "5"]
[White "D'Costa, Leston"]
[Black "Cunningham, Jim M"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "1421"]
[BlackElo "1556"]
[PlyCount "88"]
[EventDate "2014.10.10"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "SCO"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 Bg7 5. f3 c6 6. Bd3 b5 7. Qd2 0-0 8. Nge2 b4 9. Nd1 a5 10. 0-0 Qc7 11. a3 c5 12. c3 c4 13. Bc2 b3 14. Bb1 e5 15. dxe5 dxe5 16. f4 Ng4 17. fxe5 Nxe3 18. Nxe3 Bh6 19. Nf4 Rd8 20. Nfd5 Qxe5 21. Nxc4 Bxd2 22. Nxe5 Be6 23. Nf6+ Kg7 24. Bd3 Bg5 25. Nd5 Ra7 26. Bc4 a4 27. Rad1 Ra5 28. Nf3 Bh6 29. h3 f5 30. Nb6 Rxd1 31. Rxd1 Bxc4 32. Nxc4 Rc5 33. Nd6 fxe4 34. Nxe4 Rc4 35. Nd6 Rc5 36. Kf2 Nc6 37. Ne4 Rf5 38. g4 Rf4 39. Nc5 Kf7 40. Rd7+ Kg8 41. Ke2 Bf8 42. Nd3 Re4+ 43. Kd2 Na5 44. Rd4 Nc6 1/2-1/2

[Event "Gilbert Cup"]
[Site "Stirling"]
[Date "2014.08.06"]
[Round "6.3"]
[White "Hearne, Catherine"]
[Black "D'Costa, Leston"]
[Result "1/2-1/2"]
[ECO "A80"]
[WhiteElo "1421"]
[PlyCount "48"]
[EventDate "2014.08.04"]
[EventType "team-tourn"]
[EventRounds "6"]
[EventCountry "SCO"]
[SourceTitle "CBM 162 Extra"]
[Source "ChessBase"]
[SourceDate "2014.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2014.10.17"]
[SourceQuality "1"]
[WhiteTeam "Ireland"]
[BlackTeam "Scotland"]
[WhiteTeamCountry "IRL"]
[BlackTeamCountry "SCO"]

1. d4 f5 2. Nc3 d5 3. Nf3 Nf6 4. Bf4 e6 5. h3 Bd6 6. Bxd6 Qxd6 7. e3 0-0 8. Ne5 c6 9. g4 Nbd7 10. f4 Ne4 11. Nxe4 fxe4 12. a3 Nxe5 13. dxe5 Qe7 14. g5 Bd7 15. h4 Rad8 16. Bg2 Qc5 17. Qe2 a6 18. h5 Be8 19. Bh3 Qe7 20. 0-0-0 b5 21. Qg4 Bd7 22. Qe2 c5 23. Qd2 Ra8 24. Qa5 b4 1/2-1/2

[Event "Dundee & Angus Minor"]
[Site "Dundee"]
[Date "2012.10.??"]
[Round "5"]
[White "Bridges, David"]
[Black "D'Costa, Leston"]
[Result "1-0"]
[ECO "A85"]
[WhiteElo "1308"]
[BlackElo "834"]
[PlyCount "95"]
[EventDate "2012.10.12"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 f5 2. Nf3 e6 3. c4 Nf6 4. Nc3 Be7 5. h3 0-0 6. Bg5 Nc6 7. d5 Nb8 8. e3 d6 9. dxe6 Bxe6 10. Bd3 Nc6 11. a3 Ne4 12. Bxe7 Qxe7 13. Nxe4 fxe4 14. Bxe4 Bxc4 15. Qc2 Be6 16. Bxh7+ Kh8 17. 0-0 Bxh3 18. Qe4 Qxe4 19. Bxe4 Bd7 20. g3 Rae8 21. Bd5 b6 22. Nh4 Kh7 23. Rac1 Rc8 24. Bxc6 Bxc6 25. Rxc6 Kh6 26. Ng2 Kg6 27. Nf4+ Kf6 28. Nd5+ Ke6 29. Nxc7+ Kd7 30. Rfc1 b5 31. R6c2 Rf5 32. Na6 Rfc5 33. Nxc5+ dxc5 34. Rxc5 Rxc5 35. Rxc5 a6 36. f4 Kd6 37. Rg5 Ke6 38. Rxg7 Kf5 39. Re7 Kg4 40. Kf2 Kf5 41. Kf3 a5 42. g4+ Kf6 43. Re5 b4 44. axb4 axb4 45. g5+ Kg6 46. Kg4 Kg7 47. Re7+ Kg6 48. f5# 1-0

[Event "Dundee & Angus Minor"]
[Site "Dundee"]
[Date "2012.10.??"]
[Round "?"]
[White "D'Costa, Leston"]
[Black "Whyte, Nigel"]
[Result "0-1"]
[ECO "B15"]
[WhiteElo "834"]
[BlackElo "1216"]
[PlyCount "75"]
[EventDate "2012.10.12"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 a6 4. Nf3 h6 5. exd5 cxd5 6. Bd2 Nc6 7. Bd3 e6 8. Qe2 Bd6 9. 0-0-0 Nge7 10. Rde1 Nb4 11. h4 Qa5 12. a3 Nxd3+ 13. Qxd3 Qc7 14. g4 g6 15. g5 h5 16. Rhf1 0-0 17. Ne5 Nf5 18. Nd1 b5 19. Ne3 Bb7 20. Qb3 Nxd4 21. Qd3 Bxe5 22. Bc3 Nf3 23. Bxe5 Nxe5 24. Qd4 Rac8 25. c3 Nf3 26. Qd3 d4 27. Nc2 dxc3 28. bxc3 Nxe1 29. Rxe1 Qxc3 30. Qxc3 Rxc3 31. Kb2 Rfc8 32. Rc1 Be4 33. f4 Bxc2 34. Ka2 Bb3+ 35. Kb2 Rxc1 36. Kxb3 R8c4 37. Kb2 Rh1 38. a4 0-1

[Event "Scotland Primary"]
[Site "Scotland"]
[Date "2012.06.17"]
[Round "6"]
[White "D'Costa, Leston"]
[Black "Davis, Robert"]
[Result "1-0"]
[ECO "C44"]
[PlyCount "37"]
[EventDate "2012.06.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 Nf6 4. Bg5 Be7 5. Nxe5 Nxe5 6. dxe5 Nxe4 7. Bxe7 Qxe7 8. Qe2 Qxe5 9. Nc3 d5 10. f3 f5 11. fxe4 d4 12. Nb5 fxe4 13. 0-0-0 Bd7 14. Rxd4 Bxb5 15. Qxb5+ Qxb5 16. Bxb5+ c6 17. Rxe4+ Kf8 18. Rf1+ Kg8 19. Bc4# 1-0

[Event "Scotland Primary"]
[Site "Scotland"]
[Date "2012.06.17"]
[Round "5"]
[White "Gray, Euan"]
[Black "D'Costa, Leston"]
[Result "1-0"]
[ECO "B23"]
[PlyCount "33"]
[EventDate "2012.06.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Bc4 Bg7 5. Nf3 b6 6. 0-0 Qc7 7. d3 Bb7 8. Ng5 e6 9. f5 Nge7 10. f6 Bxf6 11. Rxf6 Ne5 12. Bf4 h6 13. Nxf7 Rh7 14. Bxe5 Qc6 15. Nd6+ Kd8 16. Nxb7+ Qxb7 17. Rf8# 1-0

[Event "Scotland Primary"]
[Site "Scotland"]
[Date "2012.06.16"]
[Round "1"]
[White "Constance, Tom"]
[Black "D'Costa, Leston"]
[Result "0-1"]
[ECO "A80"]
[PlyCount "48"]
[EventDate "2012.06.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 f5 2. e3 Nf6 3. c3 e6 4. Nd2 Be7 5. g3 0-0 6. Bg2 d5 7. Ngf3 Bd7 8. 0-0 Be8 9. b4 Bh5 10. Qc2 Ne4 11. Nxe4 dxe4 12. Ne5 Nc6 13. Nxc6 bxc6 14. Bb2 Qe8 15. Qb3 Qg6 16. Qxe6+ Qxe6 17. Bh3 Bh4 18. Kg2 Bf3+ 19. Kg1 Qh6 20. Bxf5 Rxf5 21. h3 Bxg3 22. fxg3 Qxh3 23. Kf2 Bd1+ 24. Ke1 Qxf1+ 0-1

[Event "Scotland Primary"]
[Site "Scotland"]
[Date "2012.06.16"]
[Round "3"]
[White "D'Costa, Leston"]
[Black "Richmond, Liam"]
[Result "0-1"]
[ECO "B18"]
[PlyCount "104"]
[EventDate "2012.06.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 Bf5 5. Nc3 Nf6 6. Nf3 Nbd7 7. Bd3 Bxd3 8. Qxd3 e6 9. 0-0 Bd6 10. Bg5 Qc7 11. g3 0-0-0 12. Rfe1 h6 13. Bxf6 Nxf6 14. Ne5 Bxe5 15. Rxe5 Qxe5 16. dxe5 Rxd3 17. cxd3 Nd5 18. a4 Rd8 19. Rd1 Nxc3 20. bxc3 Rd5 21. c4 Rxe5 22. f4 Re2 23. Rb1 Rd2 24. Rb3 Ra2 25. Rb4 a5 26. Rb1 Rxa4 27. Kf2 Ra2+ 28. Kg1 a4 29. h4 a3 30. Rb3 Ra1+ 31. Kf2 a2 32. Ra3 b5 33. cxb5 cxb5 34. Ke2 b4 35. Ra4 b3 36. Rc4+ Kd7 37. Rb4 Re1+ 38. Kxe1 a1Q+ 39. Kf2 b2 40. Rxb2 Qxb2+ 41. Kf3 Kd6 42. Kg4 Qe2+ 43. Kh3 Qxd3 44. Kg4 f5+ 45. Kh5 Qf3+ 46. Kg6 Qxg3+ 47. Kh7 Ke7 48. Kg8 g5 49. fxg5 hxg5 50. hxg5 Qxg5+ 51. Kh7 Kf8 52. Kh8 Qg7# 0-1

[Event "Scotland Primary"]
[Site "Scotland"]
[Date "2012.06.16"]
[Round "2"]
[White "D'Costa, Leston"]
[Black "Shafi, Declan"]
[Result "1-0"]
[ECO "B23"]
[PlyCount "65"]
[EventDate "2012.06.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. f4 g6 4. Nf3 Nf6 5. Bc4 Bg7 6. 0-0 0-0 7. Qe1 Nc6 8. d3 Nd4 9. Qh4 Nxc2 10. Rb1 Nd4 11. f5 Bd7 12. Bh6 b5 13. Bd5 Rb8 14. Bxg7 Kxg7 15. e5 Nxf3+ 16. Rxf3 Nxd5 17. Nxd5 Bxf5 18. Qg5 Be6 19. Nf4 Bxa2 20. Rh3 Rh8 21. Ra1 Bb3 22. Rxa7 h6 23. Qg3 dxe5 24. Nh5+ Kf8 25. Qxe5 Qd4+ 26. Qxd4 cxd4 27. Nf4 e5 28. Ne2 Kg7 29. Nc1 Bc2 30. Rf3 Rhf8 31. Rf2 Ba4 32. b3 Rbc8 33. Rf1 1-0

[Event "Scotland Primary"]
[Site "Scotland"]
[Date "2012.06.16"]
[Round "3"]
[White "Turner, Jack"]
[Black "D'Costa, Leston"]
[Result "0-1"]
[ECO "B30"]
[PlyCount "74"]
[EventDate "2012.06.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "SCO"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Nc3 g6 4. Bc4 Bg7 5. 0-0 a6 6. Ng5 e6 7. Nf3 b5 8. Be2 Qc7 9. h3 Nf6 10. d3 Nd4 11. Be3 Nxe2+ 12. Qxe2 0-0 13. a3 d5 14. exd5 exd5 15. d4 Re8 16. Nd1 cxd4 17. Bxd4 Rxe2 18. c3 Ne4 19. Bxg7 Kxg7 20. Nd4 Nd2 21. Nxe2 Nxf1 22. Kxf1 Qh2 23. Ne3 Bb7 24. Ng4 Qd6 25. Rd1 Qc6 26. Nd4 Qc4+ 27. Ke1 Re8+ 28. Kd2 Bc8 29. Kc2 Bxg4 30. f3 Bf5+ 31. Kc1 a5 32. g4 Bd3 33. f4 b4 34. axb4 axb4 35. Nc2 bxc3 36. Na3 cxb2+ 37. Kd2 Re2# 0-1

