[Event "Southern California-ch"]
[Site "Temecula"]
[Date "2024.06.16"]
[Round "6"]
[White "Ali Marandi, Cemil Can"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "B30"]
[WhiteElo "2511"]
[BlackElo "2219"]
[PlyCount "140"]
[EventDate "2024.06.13"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[EventCategory "7"]
[SourceTitle "CB25_2024"]
[SourceDate "2024.06.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.06.01"]
[SourceQuality "2"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. Bxc6 bxc6 5. d3 Ne7 6. Nbd2 Ng6 7. h4 h5 8. e5 f6 9. Qe2 Kf7 10. Nc4 d5 11. exd6 Bxd6 12. Nfd2 Be7 13. Ne4 e5 14. Be3 Qd5 15. 0-0-0 Bf5 16. f3 Nf8 17. Rhe1 Ne6 18. Qf2 Rad8 19. Nc3 Qd7 20. f4 exf4 21. Bxf4 Bg4 22. Rd2 Nxf4 23. Qxf4 Bd6 24. Qf2 Rhe8 25. Ne4 Bf8 26. Rf1 Qd4 27. Qf4 Kg8 28. c3 Qd7 29. Ne3 Be6 30. c4 Qf7 31. g4 Rd4 32. Nc2 Rd7 33. gxh5 Qxh5 34. Ne3 Kh8 35. Kc2 Bg8 36. Nf5 Re5 37. Nfg3 Qe8 38. h5 Rf7 39. Nf5 Rd7 40. Nfg3 Rf7 41. Nf5 Rd7 42. Qg4 Qe6 43. h6 g6 44. Ne3 f5 45. Qh3 Be7 46. h7 Bf7 47. Qf3 Bd8 48. Qf4 fxe4 49. Qh6 Qe8 50. Ng4 Rh5 51. Qe3 exd3+ 52. Rxd3 Qxe3 53. Rxe3 Bg5 54. Re5 Bxc4 55. Rf8+ Kxh7 56. Ree8 Bf7 57. Ra8 Re7 58. Ne5 Bd5 59. Nd3 Rh2+ 60. Kc3 Kg7 61. Nxc5 Bf6+ 62. Kd3 Rh3+ 63. Kd2 Bxb2 64. Rfe8 Rxe8 65. Rxe8 Bd4 66. Nd3 Rh2+ 67. Ke1 Rxa2 68. Nf4 Bf7 69. Rd8 c5 70. Rd7 Kf6 0-1

[Event "Southern California-ch"]
[Site "Temecula"]
[Date "2024.06.16"]
[Round "7"]
[White "Costello, Alexander"]
[Black "Bryant, John Daniel"]
[Result "1/2-1/2"]
[ECO "E69"]
[WhiteElo "2219"]
[BlackElo "2404"]
[PlyCount "42"]
[EventDate "2024.06.13"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[EventCategory "7"]
[SourceTitle "CB25_2024"]
[SourceDate "2024.06.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.06.01"]
[SourceQuality "2"]

1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 d6 6. d4 Nbd7 7. Nc3 e5 8. e4 exd4 9. Nxd4 Re8 10. Re1 c6 11. h3 a5 12. Rb1 Nc5 13. b3 Qb6 14. Be3 Qb4 15. Qc2 Nfd7 16. Red1 a4 17. Nce2 Nf6 18. Nc3 Nfd7 19. Nce2 Nf6 20. Nc3 Nfd7 21. Nce2 Nf6 1/2-1/2

[Event "Southern California-ch"]
[Site "Temecula"]
[Date "2024.06.15"]
[Round "5"]
[White "Costello, Alexander"]
[Black "Eidelman, Gabriel"]
[Result "0-1"]
[ECO "C79"]
[WhiteElo "2219"]
[BlackElo "2376"]
[PlyCount "106"]
[EventDate "2024.06.13"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[EventCategory "7"]
[SourceTitle "CB25_2024"]
[SourceDate "2024.06.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.06.01"]
[SourceQuality "2"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 d6 6. Re1 Bd7 7. d4 b5 8. dxe5 dxe5 9. Bb3 h6 10. c3 Bd6 11. Nbd2 0-0 12. h3 Qc8 13. Nf1 Rd8 14. Nh4 Be6 15. Qf3 Bxb3 16. axb3 Qe6 17. Qf5 a5 18. Qxe6 fxe6 19. Nf3 Nd7 20. Be3 Nc5 21. N1d2 Nd3 22. Reb1 Bc5 23. Bxc5 Nxc5 24. Kf1 Kf7 25. Ke2 Kf6 26. g3 g5 27. Rc1 Ra6 28. Ra3 Rb6 29. Ra2 h5 30. Rc2 Rbb8 31. Ra3 Rb6 32. Ra1 Nd7 33. Ne1 Rh8 34. Nd3 h4 35. Rh1 Rbb8 36. Rcc1 Rh7 37. Nf3 Ne7 38. gxh4 gxh4 39. Rhg1 c5 40. Nh2 Ng6 41. Ng4+ Kf7 42. Ne3 c4 43. bxc4 Nf4+ 44. Kd2 Rd8 45. Nxf4 exf4 46. Ng4 bxc4 47. Ke2 Nc5 48. Ne5+ Kf6 49. Nxc4 Nxe4 50. Nxa5 Rd2+ 51. Kf3 Kf5 52. Rgf1 Rg7 53. Nc4 Rg3+ 0-1

[Event "Southern California-ch"]
[Site "Temecula"]
[Date "2024.06.15"]
[Round "4"]
[White "Shlyakhtenko, Robert"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "E41"]
[WhiteElo "2402"]
[BlackElo "2219"]
[PlyCount "47"]
[EventDate "2024.06.13"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[EventCategory "7"]
[SourceTitle "CB25_2024"]
[SourceDate "2024.06.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.06.01"]
[SourceQuality "2"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Bxc3+ 5. bxc3 d6 6. Bd3 e5 7. Ne2 c5 8. 0-0 Nc6 9. e4 0-0 10. h3 b6 11. Be3 Ba6 12. f4 Nd7 13. fxe5 cxd4 14. cxd4 dxe5 15. d5 Nb4 16. Ng3 Rc8 17. Rc1 Nxa2 18. Ra1 Nb4 19. Ra4 Nxd3 20. Qxd3 Bb7 21. Rxa7 Qc7 22. Nf5 Nc5 23. Bxc5 Qxc5+ 24. Qe3 1-0

[Event "Southern California-ch"]
[Site "Temecula"]
[Date "2024.06.14"]
[Round "3"]
[White "Costello, Alexander"]
[Black "Akopian, Vladimir Eduardovic"]
[Result "1/2-1/2"]
[ECO "C01"]
[WhiteElo "2219"]
[BlackElo "2586"]
[PlyCount "146"]
[EventDate "2024.06.13"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[EventCategory "7"]
[SourceTitle "CB25_2024"]
[SourceDate "2024.06.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.06.01"]
[SourceQuality "2"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. exd5 exd5 5. Bd3 Nf6 6. a3 Bxc3+ 7. bxc3 0-0 8. Ne2 c5 9. dxc5 Nbd7 10. Be3 Qe7 11. 0-0 Nxc5 12. Ng3 Nce4 13. Bd4 Be6 14. Re1 Qc7 15. Nh5 Nxh5 16. Qxh5 Qf4 17. f3 g6 18. Be5 Nf6 19. Qxh7+ Kxh7 20. Bxf4 Nd7 21. Be3 Rfc8 22. Bd4 Nc5 23. h4 Nxd3 24. cxd3 Re8 25. Kf2 Bf5 26. Red1 Bd7 27. g4 f5 28. Kg3 fxg4 29. fxg4 a6 30. Rf1 Kg8 31. Rf6 Re6 32. Raf1 Rae8 33. Rf7 R6e7 34. R7f3 Re1 35. Rxe1 Rxe1 36. Kf4 Re2 37. Kg5 Rg2 38. Rf4 b5 39. h5 gxh5 40. Kxh5 Rh2+ 41. Kg6 Rh4 42. Kg5 Rh7 43. Rf3 Rh2 44. Kf6 Rh6+ 45. Kg5 Rh7 46. Bf6 Rh2 47. Kf4 Rh6 48. Bd4 Rh7 49. Ke5 Rg7 50. Kxd5 Bxg4 51. Rf6 Be2 52. Rxa6 Rg4 53. c4 bxc4 54. dxc4 Rg5+ 55. Be5 Bxc4+ 56. Kxc4 Rxe5 57. Rf6 Re4+ 58. Kc5 Ra4 59. Rf3 Ra8 60. Kb6 Kg7 61. Kb5 Rb8+ 62. Kc4 Ra8 63. Kb4 Rb8+ 64. Kc3 Ra8 65. Kc4 Rc8+ 66. Kb5 Rb8+ 67. Ka6 Ra8+ 68. Kb7 Ra4 69. Rc3 Kf7 70. Kb6 Ke7 71. Kb5 Ra8 72. a4 Rb8+ 73. Kc5 Rc8+ 1/2-1/2

[Event "Southern California-ch"]
[Site "Temecula"]
[Date "2024.06.14"]
[Round "2"]
[White "Hakobyan, Eduard"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "A22"]
[WhiteElo "2297"]
[BlackElo "2219"]
[PlyCount "79"]
[EventDate "2024.06.13"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[EventCategory "7"]
[SourceTitle "CB25_2024"]
[SourceDate "2024.06.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.06.01"]
[SourceQuality "2"]

1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 0-0 5. Nf3 Re8 6. 0-0 c6 7. d3 Bxc3 8. bxc3 d5 9. Nd2 Be6 10. Rb1 Qc7 11. Qb3 b6 12. cxd5 Bxd5 13. Qc2 Bxg2 14. Kxg2 c5 15. e4 Nbd7 16. Nc4 Rac8 17. a4 Qc6 18. f3 a6 19. Be3 Rb8 20. Rb2 Red8 21. Rfb1 Ne8 22. f4 f5 23. fxe5 fxe4 24. dxe4 Nc7 25. Rd1 Qe6 26. Qe2 b5 27. axb5 axb5 28. Rd6 Qe7 29. Rbd2 Ne8 30. Na5 Nxe5 31. Rxd8 Rxd8 32. Rxd8 Qxd8 33. Qxb5 Qa8 34. Nb7 Nf6 35. Qxc5 Qa2+ 36. Bf2 Nd3 37. Qc8+ Kf7 38. Nd6+ Ke7 39. Nf5+ Kf7 40. Qc7+ 1-0

[Event "Southern California-ch"]
[Site "Temecula"]
[Date "2024.06.13"]
[Round "1"]
[White "Costello, Alexander"]
[Black "Khachiyan, Melikset"]
[Result "1/2-1/2"]
[ECO "B35"]
[WhiteElo "2219"]
[BlackElo "2435"]
[PlyCount "89"]
[EventDate "2024.06.13"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[EventCategory "7"]
[SourceTitle "CB25_2024"]
[SourceDate "2024.06.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.06.01"]
[SourceQuality "2"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 0-0 8. Bb3 Re8 9. h3 d6 10. Qd3 Na5 11. 0-0 Nxb3 12. axb3 b6 13. Nd5 Bb7 14. c4 a6 15. Bg5 e6 16. Nxf6+ Bxf6 17. Bxf6 Qxf6 18. b4 d5 19. exd5 exd5 20. c5 Re4 21. Rfd1 a5 22. Qc3 Rc8 23. Rac1 axb4 24. Qxb4 Kg7 25. f3 Rh4 26. c6 Bxc6 27. Qxb6 Ba4 28. Qxf6+ Kxf6 29. Rxc8 Bxd1 30. Nc2 Bxc2 31. Rxc2 Rb4 32. Re2 h5 33. Kf2 d4 34. h4 Rb3 35. g4 hxg4 36. fxg4 Rh3 37. Re4 Rh2+ 38. Kg3 Rd2 39. b4 d3 40. Kf3 Rh2 41. Rd4 Ke5 42. Rxd3 Rh3+ 43. Ke2 Rxh4 44. Re3+ Kd5 45. Rd3+ 1/2-1/2

[Event "Biel HTO 56th"]
[Site "Biel"]
[Date "2023.07.27"]
[Round "10"]
[White "Matsumura, Cocoro"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "B30"]
[WhiteElo "2081"]
[BlackElo "2224"]
[PlyCount "148"]
[EventDate "2023.07.17"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "SUI"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. 0-0 Nge7 5. Nc3 a6 6. Bxc6 Nxc6 7. d4 cxd4 8. Nxd4 Qc7 9. Nxc6 Qxc6 10. Qd4 b5 11. Bf4 f6 12. Qd3 Bb7 13. Rad1 Bc5 14. a3 Rd8 15. Bd6 Bxd6 16. Qxd6 Qxd6 17. Rxd6 Bc6 18. f3 Ke7 19. Rfd1 Rhf8 20. Ne2 e5 21. Nc1 f5 22. exf5 Rxf5 23. Na2 Rf6 24. R6d3 d6 25. Nb4 Bb7 26. a4 Rf4 27. c3 bxa4 28. Ra1 a5 29. Nd5+ Bxd5 30. Rxd5 Ra8 31. Rad1 Ra6 32. Rb5 Ke6 33. Rb7 a3 34. bxa3 Ra4 35. Rxg7 Rxa3 36. Rxh7 Rxc3 37. Rd2 a4 38. Rb7 Rb3 39. Rb2 Rxb7 40. Rxb7 a3 41. Rb1 a2 42. Ra1 Kf5 43. Kf2 d5 44. h4 d4 45. g4+ Kf6 46. Ke2 Ra3 47. Kf2 Ke6 48. Ke2 e4 49. fxe4 Rh3 50. Kf2 Rh2+ 51. Kg3 Rb2 52. h5 d3 53. h6 Kf7 54. e5 Rb3 55. e6+ Kxe6 56. h7 d2+ 57. Kf2 Rh3 58. Ke2 Rh2+ 59. Ke3 Kd5 60. h8Q Rxh8 61. Kxd2 Kc4 62. Ke3 Kb3 63. g5 Rh4 64. Rg1 Kb2 65. Rg2+ Ka3 66. Rg1 Rb4 67. g6 Rb1 68. Rg5 Kb4 69. g7 a1Q 70. Rg4+ Kb5 71. g8Q Qe5+ 72. Kf2 Qf5+ 73. Ke2 Rb2+ 74. Ke3 Qf2+ 0-1

[Event "Biel HTO 56th"]
[Site "Biel"]
[Date "2023.07.26"]
[Round "9"]
[White "Costello, Alexander"]
[Black "Prieb, Robert"]
[Result "1/2-1/2"]
[ECO "E57"]
[WhiteElo "2224"]
[BlackElo "2060"]
[PlyCount "176"]
[EventDate "2023.07.17"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "SUI"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. e3 c5 5. d4 Nc6 6. a3 dxc4 7. Bxc4 cxd4 8. exd4 Be7 9. 0-0 0-0 10. Qd3 b6 11. Bg5 Bb7 12. Rad1 Nd5 13. Ne4 Nf6 14. Bxf6 Bxf6 15. d5 exd5 16. Bxd5 Na5 17. Bxb7 Qxd3 18. Rxd3 Nxb7 19. Nxf6+ gxf6 20. Rfd1 Rfd8 21. Kf1 Kf8 22. b4 Rxd3 23. Rxd3 Rd8 24. Nd4 Rd5 25. Ke2 Nd8 26. f4 Ke8 27. Nf3 Rxd3 28. Kxd3 Kd7 29. Ke4 Nb7 30. Kd5 Nd6 31. Nd4 a6 32. a4 Ne8 33. Nf5 Nc7+ 34. Ke4 a5 35. bxa5 bxa5 36. Nd4 Na8 37. Kf5 Ke7 38. Nc6+ Kf8 39. Kxf6 Nb6 40. Nxa5 Nxa4 41. Nc4 Nc3 42. Ke5 Ke7 43. Nb6 f6+ 44. Kd4 Ne2+ 45. Ke4 Nc3+ 46. Kd3 Nb5 47. Kc4 Nd6+ 48. Kd5 Nb5 49. Nc4 Nc3+ 50. Kd4 Ne2+ 51. Ke4 Ke6 52. Kf3 Nd4+ 53. Kg4 Ne2 54. g3 Nd4 55. Ne3 Kf7 56. Kh5 Nf3 57. h4 Nd4 58. Kh6 Ne2 59. Nf1 Kg8 60. f5 Kh8 61. g4 Nd4 62. Nd2 Kg8 63. Ne4 Kh8 64. Nc5 Nf3 65. Kh5 Kg7 66. g5 fxg5 67. hxg5 Kf7 68. Ne6 Ne5 69. Kh6 Kg8 70. Nd8 Ng4+ 71. Kh5 Ne3 72. f6 Kh8 73. Kh4 Kg8 74. Kg3 Nd5 75. Kg4 Ne3+ 76. Kf4 Ng2+ 77. Ke5 Kf8 78. Ke6 Nf4+ 79. Kf5 Ng2 80. Nc6 Ne3+ 81. Ke6 Ng2 82. Ne5 Nf4+ 83. Kf5 Nd5 84. Kg4 h6 85. Ng6+ Kf7 86. Nh8+ Kf8 87. Ng6+ Kf7 88. Ne7 Nxf6+ 1/2-1/2

[Event "Biel HTO 56th"]
[Site "Biel"]
[Date "2023.07.25"]
[Round "8"]
[White "Morawietz, Dieter"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "D91"]
[WhiteElo "2396"]
[BlackElo "2224"]
[PlyCount "67"]
[EventDate "2023.07.17"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "SUI"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5 Ne4 5. Bh4 Nxc3 6. bxc3 c5 7. e3 Nc6 8. Nf3 Bg7 9. cxd5 Qxd5 10. Be2 cxd4 11. cxd4 Qa5+ 12. Qd2 Be6 13. Rb1 b6 14. Bb5 Bd7 15. 0-0 Qxd2 16. Nxd2 Na5 17. Ba6 Bc6 18. Nb3 Nxb3 19. Rxb3 e5 20. Rc3 Bd7 21. Rc7 Be6 22. Bb7 Rb8 23. Bc6+ Kf8 24. d5 Bf5 25. Be7+ Kg8 26. d6 Bf8 27. Bd5 Kg7 28. e4 Bc8 29. Rfc1 Ba6 30. Rxa7 Bxe7 31. Rxe7 Rbd8 32. Rxf7+ Kh6 33. Rc6 Bb7 34. Rxb7 1-0

[Event "Biel HTO 56th"]
[Site "Biel"]
[Date "2023.07.24"]
[Round "7"]
[White "Costello, Alexander"]
[Black "Collin, Moritz Valentin"]
[Result "1-0"]
[ECO "A20"]
[WhiteElo "2224"]
[BlackElo "2132"]
[PlyCount "51"]
[EventDate "2023.07.17"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "SUI"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. c4 e5 2. Qc2 Nf6 3. e3 Nc6 4. a3 a5 5. Nc3 Bc5 6. Be2 0-0 7. Bf3 Ne7 8. Nge2 d6 9. 0-0 Bf5 10. d3 c6 11. Ne4 Ng6 12. N2g3 Be6 13. Nxc5 dxc5 14. b3 Nd7 15. Be2 f5 16. f4 Qc7 17. Bb2 exf4 18. Nh5 fxe3 19. Nxg7 Qd6 20. d4 cxd4 21. Bxd4 f4 22. Rad1 Qe7 23. Qe4 Bf5 24. Nxf5 Qg5 25. Qe6+ Rf7 26. Nd6 1-0

[Event "Biel HTO 56th"]
[Site "Biel"]
[Date "2023.07.23"]
[Round "6"]
[White "Sukandar, Irine Kharisma"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "B30"]
[WhiteElo "2358"]
[BlackElo "2224"]
[PlyCount "133"]
[EventDate "2023.07.17"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "SUI"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. Bxc6 bxc6 5. d3 Ne7 6. 0-0 Ng6 7. e5 Be7 8. Nc3 f6 9. exf6 gxf6 10. Bh6 e5 11. Nd2 Qb6 12. Qh5 Rg8 13. Be3 d6 14. f4 Kd8 15. Qxh7 Be6 16. f5 Nf8 17. Qh5 Bd7 18. Nce4 Be8 19. Qh6 Nd7 20. Qh7 Rf8 21. Rab1 Rf7 22. Qh8 d5 23. Ng3 a5 24. a3 Qc7 25. Nh5 Bf8 26. Bh6 Qd6 27. Rbe1 Rb8 28. b3 Qe7 29. Nf4 Rh7 30. Ne6+ Kc8 31. Bxf8 Qf7 32. Qxh7 Qxh7 33. Bd6 Rb7 34. Rf2 Bf7 35. Re3 Qg8 36. Nxc5 Nxc5 37. Bxc5 Bh5 38. b4 a4 39. Nf1 Rg7 40. Ng3 Be8 41. Re1 Rg5 42. Rc1 Bf7 43. Rb1 Rg4 44. Ne2 d4 45. h3 Rh4 46. Kh2 Bd5 47. c4 dxc3 48. Nxc3 Rf4 49. Rbf1 Kb7 50. g4 Rxf2+ 51. Rxf2 Qg5 52. Nxa4 Qc1 53. Nb6 Qd1 54. Nxd5 cxd5 55. g5 Qh5 56. gxf6 d4 57. f7 Qxf7 58. f6 Kc6 59. a4 Kd5 60. a5 e4 61. dxe4+ Kxe4 62. a6 Ke3 63. a7 Qc7+ 64. Kg2 Qc6+ 65. Kg1 Qd5 66. f7 Qg5+ 67. Rg2 1-0

[Event "Biel HTO 56th"]
[Site "Biel"]
[Date "2023.07.21"]
[Round "5"]
[White "Costello, Alexander"]
[Black "Seul, Georg"]
[Result "1/2-1/2"]
[ECO "B12"]
[WhiteElo "2224"]
[BlackElo "2376"]
[PlyCount "51"]
[EventDate "2023.07.17"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "SUI"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 c5 4. dxc5 e6 5. Nf3 Bxc5 6. Bd3 Ne7 7. 0-0 Ng6 8. a3 Be7 9. Re1 Nc6 10. b4 f6 11. Bxg6+ hxg6 12. Qd3 0-0 13. Bb2 g5 14. h3 a5 15. bxa5 Rxa5 16. Nbd2 Ra4 17. c4 dxc4 18. Qc2 b5 19. exf6 Bxf6 20. Ne4 Qd3 21. Qc1 c3 22. Nxf6+ gxf6 23. Qxc3 Qxc3 24. Bxc3 e5 25. Reb1 Ba6 26. Nd2 1/2-1/2

[Event "Biel HTO 56th"]
[Site "Biel"]
[Date "2023.07.20"]
[Round "4"]
[White "Akshit, Kumar J"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "C54"]
[WhiteElo "2105"]
[BlackElo "2224"]
[PlyCount "82"]
[EventDate "2023.07.17"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "SUI"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 a6 6. a4 d6 7. 0-0 h6 8. Nbd2 0-0 9. h3 Ba7 10. Re1 Re8 11. b4 Be6 12. Qc2 Qd7 13. Bxe6 Rxe6 14. Nc4 d5 15. exd5 Qxd5 16. Ne3 Bxe3 17. Rxe3 Qd7 18. Qb2 Nd5 19. b5 axb5 20. axb5 Rxa1 21. Qxa1 Nxe3 22. bxc6 Qxd3 23. Bxe3 bxc6 24. Qa5 Qd6 25. Nh4 Kh7 26. Nf5 Qd3 27. g4 Qd7 28. Qb4 h5 29. Kh2 g6 30. Nh6 hxg4 31. hxg4 f6 32. Kg3 Kg7 33. Qb3 Re8 34. Qc4 f5 35. gxf5 gxf5 36. Bg5 Kg6 37. f4 e4 38. Kh4 Kh7 39. Nf7 Qd2 40. Bf6 Qh2+ 41. Kg5 Qg3+ 0-1

[Event "Biel HTO 56th"]
[Site "Biel"]
[Date "2023.07.19"]
[Round "3"]
[White "Costello, Alexander"]
[Black "Vantika, Agrawal"]
[Result "0-1"]
[ECO "B51"]
[WhiteElo "2224"]
[BlackElo "2428"]
[PlyCount "104"]
[EventDate "2023.07.17"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "SUI"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. d4 cxd4 5. Qxd4 a6 6. Bxd7+ Bxd7 7. Bg5 Rc8 8. Nc3 h6 9. Bh4 e5 10. Qd3 g5 11. Bg3 Qc7 12. Nd2 Nf6 13. 0-0-0 b5 14. a3 Be6 15. h4 g4 16. f3 h5 17. Kb1 gxf3 18. gxf3 Bh6 19. Bf2 Ke7 20. Rhe1 Rhg8 21. Re2 Rg6 22. Be3 Bxe3 23. Rxe3 Rg2 24. Ree1 Qb6 25. f4 Qd4 26. fxe5 dxe5 27. Nf3 Qxd3 28. Rxd3 Nd7 29. Kc1 f6 30. Rd2 Rg3 31. Rf2 Nb6 32. Nd1 Nc4 33. Ne3 Nd6 34. Nd2 Rcg8 35. Nd5+ Bxd5 36. exd5 Rg1 37. Kd1 Rxe1+ 38. Kxe1 Rg4 39. Nf3 Nf5 40. Ng5 Rg1+ 41. Kd2 Nd6 42. Nf3 Rg4 43. Re2 Nc4+ 44. Ke1 Rf4 45. Ng5 fxg5 46. b3 Nxa3 47. Rxe5+ Kd6 48. Re6+ Kxd5 49. Rxa6 Nxc2+ 50. Kd1 Nb4 51. Ra5 Kc5 52. hxg5 Rg4 0-1

[Event "Biel HTO 56th"]
[Site "Biel"]
[Date "2023.07.18"]
[Round "2"]
[White "Stijve, Niels"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "B33"]
[WhiteElo "2088"]
[BlackElo "2224"]
[PlyCount "74"]
[EventDate "2023.07.17"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "SUI"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Qb6 5. Nb3 Nf6 6. Nc3 e6 7. Be3 Qc7 8. Qd2 Bb4 9. f3 d5 10. a3 Bxc3 11. Qxc3 e5 12. Bg5 d4 13. Qd2 Nb8 14. Rc1 Be6 15. Bd3 Nbd7 16. 0-0 0-0 17. f4 Qb6 18. Na5 exf4 19. Rxf4 Ng4 20. Nc4 Qc5 21. Bh4 Rac8 22. h3 Bxc4 23. hxg4 Bxd3 24. Qxd3 Ne5 25. Qf1 Ng6 26. Rf5 Qc6 27. Bg3 Qxe4 28. c4 dxc3 29. bxc3 Qxg4 30. Bd6 Rfd8 31. Bb4 f6 32. Rf2 Ne5 33. Rf4 Qg3 34. Rc2 Ng4 35. Qf3 Qh2+ 36. Kf1 Qh1+ 37. Ke2 Qd1# 0-1

[Event "Biel HTO 56th"]
[Site "Biel"]
[Date "2023.07.17"]
[Round "1"]
[White "Costello, Alexander"]
[Black "Rodrigue Lemieux, Shawn"]
[Result "0-1"]
[ECO "D38"]
[WhiteElo "2224"]
[BlackElo "2495"]
[PlyCount "80"]
[EventDate "2023.07.17"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "SUI"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 Bb4 5. Qa4+ Nc6 6. Bg5 h6 7. Bxf6 Qxf6 8. e3 0-0 9. Qc2 Rd8 10. a3 Bf8 11. Rd1 Ne7 12. c5 b6 13. b4 Bd7 14. Ba6 Rab8 15. 0-0 bxc5 16. bxc5 e5 17. Be2 exd4 18. Nxd4 Be8 19. Ncb5 Rb7 20. Rc1 a6 21. Nc3 Nc6 22. Rfd1 Ne5 23. e4 dxe4 24. Qxe4 c6 25. Na4 Rbd7 26. Nf5 g6 27. Rxd7 gxf5 28. Rxd8 fxe4 29. Rxe8 Nd3 30. Bxd3 exd3 31. Nb6 Kg7 32. Nd7 d2 33. Rd1 Qf5 34. Re2 Qxd7 35. Rdxd2 Qf5 36. Rc2 Bxc5 37. g3 Bxa3 38. Rxc6 Bc5 39. Rc7 Qb1+ 40. Kg2 Qb6 0-1

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2023.06.18"]
[Round "9"]
[White "Costello, Alexander"]
[Black "Tang, Zoey"]
[Result "1-0"]
[ECO "B40"]
[WhiteElo "2186"]
[BlackElo "2348"]
[PlyCount "137"]
[EventDate "2023.06.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Bd3 Nc6 6. Nxc6 bxc6 7. 0-0 e6 8. f4 Bb7 9. Qe2 Qc7 10. Nd2 Be7 11. e5 dxe5 12. fxe5 Nd7 13. Nc4 Nc5 14. Qg4 Nxd3 15. cxd3 0-0-0 16. Be3 h5 17. Qe2 Ba6 18. Rxf7 Bxc4 19. dxc4 Rd7 20. Bf2 g5 21. Kh1 g4 22. Re1 Rhd8 23. Qe4 Kb8 24. Bg3 Rd1 25. Rff1 R1d2 26. Qg6 Qb7 27. c5 Qd7 28. Bf4 Rxb2 29. Bc1 Rb7 30. Qxh5 g3 31. Rd1 Qc8 32. Rxd8 Qxd8 33. Rd1 Qg8 34. Qf3 Rc7 35. Be3 gxh2 36. Qe4 Ka8 37. Rf1 Rc8 38. Qd3 Rc7 39. Bd2 Bxc5 40. Ba5 Rb7 41. Qc4 Rb2 42. Qe4 Kb7 43. Bc3 Rf2 44. Rb1+ Kc7 45. Ba5+ Bb6 46. Bb4 Qg5 47. Bd6+ Kb7 48. a4 Rb2 49. a5 Qe3 50. Qh7+ Ka6 51. axb6 Rxb1+ 52. Qxb1 axb6 53. Kxh2 Qh6+ 54. Kg3 Qe3+ 55. Kh4 Qf4+ 56. Kh5 Qh2+ 57. Kg6 Qxg2+ 58. Kf7 Qd5 59. Qg6 b5 60. Qxe6 Qf3+ 61. Ke7 Qg2 62. Kd8 Kb6 63. Qf7 Qg5+ 64. Kc8 Qg4+ 65. Kb8 b4 66. Qb7+ Ka5 67. Qxb4+ Qxb4+ 68. Bxb4+ Kxb4 69. e6 1-0

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2023.06.17"]
[Round "6"]
[White "Chasin, Nico Werner"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "E12"]
[WhiteElo "2459"]
[BlackElo "2186"]
[PlyCount "123"]
[EventDate "2023.06.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 b6 3. Nc3 Bb7 4. d4 e6 5. a3 d5 6. Bg5 Be7 7. e3 0-0 8. Bxf6 Bxf6 9. cxd5 exd5 10. Qb3 c6 11. Bd3 Na6 12. 0-0 Nc7 13. a4 Ne6 14. a5 Rb8 15. a6 Ba8 16. Rfd1 Qe7 17. Qa4 c5 18. Bb5 Rfc8 19. Rac1 Nc7 20. b3 Nxb5 21. Qxb5 Bc6 22. Qe2 Rd8 23. Qa2 Rbc8 24. Ne2 Bb5 25. Nc3 Bc6 26. Ne2 Bb5 27. Nf4 c4 28. Nd2 c3 29. Nb1 c2 30. Rxc2 Rxc2 31. Qxc2 Bxa6 32. Qa2 Bb5 33. Nc3 Bc6 34. b4 Qd7 35. Ra1 Be7 36. b5 Bxb5 37. Nfxd5 Bf8 38. Qxa7 Qxa7 39. Rxa7 Rc8 40. h4 Bd6 41. Rb7 Ra8 42. g3 Bd3 43. Rxb6 Bf8 44. Nf4 Bf5 45. e4 Bg4 46. Kg2 Ra3 47. Rc6 Bb4 48. Nfd5 Ba5 49. Ra6 h6 50. Ne3 Bd7 51. Ncd5 Bb5 52. Ra8+ Kh7 53. Ra7 Bd3 54. Kf3 Ra2 55. Nb4 Be2+ 56. Kg2 Rb2 57. Rxa5 Rxb4 58. Rd5 Bd3 59. Kf3 Rb3 60. Rd6 f5 61. Nxf5 Bc2+ 62. Ne3 1-0

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2023.06.16"]
[Round "5"]
[White "Costello, Alexander"]
[Black "Heimann, Mark A"]
[Result "1/2-1/2"]
[ECO "E14"]
[WhiteElo "2186"]
[BlackElo "2426"]
[PlyCount "90"]
[EventDate "2023.06.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. Nf3 d5 2. e3 Nf6 3. c4 e6 4. b3 Bd6 5. Bb2 0-0 6. d4 b6 7. Nbd2 Bb7 8. Bd3 Ne4 9. 0-0 Nd7 10. cxd5 exd5 11. Ne5 Qe7 12. f4 Nxd2 13. Qxd2 f6 14. Nf3 Rfe8 15. Kf2 Nf8 16. g4 c5 17. Rac1 Ne6 18. h4 cxd4 19. Nxd4 Nc5 20. g5 Ba6 21. Rxc5 Bxd3 22. Qxd3 Bxc5 23. Rg1 g6 24. h5 Kf7 25. b4 Bxd4 26. Qxd4 Rac8 27. Qxd5+ Qe6 28. Qxe6+ Kxe6 29. Bxf6 gxh5 30. Kf3 Rc2 31. e4 Kf7 32. f5 h4 33. Rh1 h6 34. Rxh4 hxg5 35. Bxg5 Rxa2 36. Rh7+ Kg8 37. Rd7 Ra1 38. f6 Re6 39. e5 Rf1+ 40. Ke4 a5 41. bxa5 bxa5 42. Ra7 Re1+ 43. Kf5 R1xe5+ 44. Kg6 Rxg5+ 45. Kxg5 Re1 1/2-1/2

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2023.06.15"]
[Round "2"]
[White "Wen, Tommy"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "C96"]
[WhiteElo "2433"]
[BlackElo "2186"]
[PlyCount "133"]
[EventDate "2023.06.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Na5 10. Bc2 c5 11. d4 Nd7 12. Nbd2 exd4 13. cxd4 Nc6 14. d5 Nce5 15. a4 Rb8 16. Nxe5 Nxe5 17. f4 Ng6 18. Nf3 Bh4 19. Rf1 Bg3 20. Nh2 f5 21. Ra3 Qh4 22. Nf3 Qh5 23. Ng5 Qxd1 24. Bxd1 Bh4 25. exf5 Bxf5 26. g4 Bd7 27. Ne4 Be7 28. f5 Ne5 29. Bf4 b4 30. Ra1 Nd3 31. b3 Nxf4 32. Rxf4 Bf6 33. Nxf6+ gxf6 34. Be2 a5 35. Kf2 Rfe8 36. Bd3 Re5 37. Kf3 Rbe8 38. Re4 Kf8 39. Rxe5 Rxe5 40. Be4 Bc8 41. Kf4 Ba6 42. Rc1 Ke7 43. h4 h6 44. Rc2 Kd7 45. Bf3 Kc7 46. Rd2 Bc8 47. Re2 Bd7 48. Rxe5 dxe5+ 49. Ke4 Kd6 50. Be2 Be8 51. Ba6 Bf7 52. Bb7 c4 53. bxc4 Be8 54. g5 hxg5 55. hxg5 fxg5 56. c5+ Kxc5 57. Kxe5 b3 58. d6 b2 59. Be4 Bc6 60. Bd3 g4 61. f6 g3 62. f7 b1Q 63. Bxb1 g2 64. f8Q g1Q 65. d7+ Kc4 66. Ba2+ Kc3 67. Qa3+ 1-0

[Event "US Masters op"]
[Site "Charlotte"]
[Date "2022.11.23"]
[Round "1"]
[White "Theodorou, Nikolas"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "A16"]
[WhiteElo "2598"]
[BlackElo "2224"]
[PlyCount "75"]
[EventDate "2022.11.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. h4 Bg7 6. h5 c5 7. h6 Bf6 8. e4 Nxc3 9. dxc3 Qc7 10. Bb5+ Bd7 11. Bxd7+ Nxd7 12. 0-0 0-0 13. Qe2 Rfd8 14. Be3 c4 15. Rad1 Qc6 16. Bf4 e5 17. Bg3 Qe6 18. Rd5 Nb6 19. Ra5 Qg4 20. Bxe5 Bxe5 21. Rxe5 Rd3 22. Re7 Nd7 23. b3 b5 24. bxc4 bxc4 25. Qb2 Rd8 26. Nd4 Rd1 27. g3 Rd3 28. Kg2 Qg5 29. Nc6 Qf6 30. Qb7 Qf3+ 31. Kg1 Qg4 32. Qc7 Rf8 33. Nb4 Rd1 34. Nd5 Rxf1+ 35. Kxf1 Qh3+ 36. Kg1 Nb6 37. Rxf7 Rxf7 38. Nf6+ 1-0

[Event "Speed Chess Q2"]
[Site "Chess.com INT"]
[Date "2022.11.12"]
[Round "7"]
[White "Boros, Denes"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "2402"]
[BlackElo "2224"]
[PlyCount "79"]
[EventDate "2022.11.12"]
[EventType "swiss (blitz)"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 d5 3. Nf3 Bf5 4. Nh4 Bd7 5. Bg5 e6 6. Nf3 Be7 7. e3 c5 8. dxc5 0-0 9. Bd3 h6 10. Bf4 Bxc5 11. g4 Nc6 12. g5 Nh5 13. gxh6 Nxf4 14. exf4 gxh6 15. Qd2 Qf6 16. 0-0-0 Kh8 17. Ne5 Nxe5 18. fxe5 Qg5 19. f4 Qh4 20. Kb1 Rg8 21. a3 Rg4 22. Rdf1 Rag8 23. f5 Rg2 24. Ne2 exf5 25. e6 Rxe2 26. Qxe2 Bxe6 27. Qe5+ Rg7 28. Bxf5 Bd4 29. Qd6 Bxf5 30. Rxf5 Qe4 31. Qxd5 Qxd5 32. Rxd5 Bb6 33. Rd7 Kg8 34. Rxb7 Rg2 35. c4 f5 36. Rd1 f4 37. c5 Bxc5 38. Rd8+ Bf8 39. Rbb8 Kg7 40. Rxf8 1-0

[Event "Speed Chess Q2"]
[Site "Chess.com INT"]
[Date "2022.11.12"]
[Round "8"]
[White "Costello, Alexander"]
[Black "Hansen, Eric"]
[Result "0-1"]
[ECO "B50"]
[WhiteElo "2224"]
[BlackElo "2609"]
[PlyCount "70"]
[EventDate "2022.11.12"]
[EventType "swiss (blitz)"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. b3 d6 4. d4 cxd4 5. Nxd4 Nf6 6. Bd3 Nbd7 7. 0-0 Nc5 8. Re1 Be7 9. Bb2 0-0 10. Nc3 a6 11. a4 Qc7 12. Qd2 b6 13. Bf1 Bb7 14. f3 Rfd8 15. Rad1 Rac8 16. Kh1 h5 17. Nce2 d5 18. e5 Nfd7 19. Nf4 Bg5 20. g3 Nxe5 21. Ndxe6 Nxe6 22. Bxe5 Qxc2 23. Qb4 Bxf4 24. gxf4 Qf2 25. Bg2 Rc2 26. Rg1 Qc5 27. Qe1 Qf2 28. f5 Ng5 29. Bd4 Qxe1 30. Rdxe1 f6 31. Re7 Bc8 32. f4 Kf8 33. Ra7 Ne4 34. Bxb6 Re8 35. Bf3 Bxf5 0-1

[Event "Speed Chess Q2"]
[Site "Chess.com INT"]
[Date "2022.11.12"]
[Round "6"]
[White "Costello, Alexander"]
[Black "Klukin, Kirill"]
[Result "1-0"]
[ECO "E61"]
[WhiteElo "2224"]
[BlackElo "2390"]
[PlyCount "69"]
[EventDate "2022.11.12"]
[EventType "swiss (blitz)"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 g6 3. Bg5 Bg7 4. c4 0-0 5. Nc3 d6 6. e3 Nbd7 7. Be2 b6 8. d5 Bb7 9. Nd4 Nc5 10. f3 e5 11. Nc2 a5 12. e4 h6 13. Bh4 Bc8 14. Qd2 g5 15. Bf2 Nh5 16. Ne3 Nf4 17. g4 Bd7 18. 0-0-0 a4 19. Kb1 f6 20. h4 Kf7 21. Rh2 Rh8 22. Rdh1 Qe7 23. Nb5 Na6 24. Bd1 Bxb5 25. cxb5 Nc5 26. Nf5 Qd7 27. hxg5 hxg5 28. Rh7 Rxh7 29. Rxh7 Rg8 30. Bxc5 bxc5 31. Bxa4 Kf8 32. Qa5 Qc8 33. b6 cxb6 34. Qxb6 Kf7 35. Nxd6+ 1-0

[Event "Speed Chess Q2"]
[Site "Chess.com INT"]
[Date "2022.11.12"]
[Round "14"]
[White "Costello, Alexander"]
[Black "Mikhailov, Viacheslav"]
[Result "1-0"]
[ECO "B31"]
[WhiteElo "2224"]
[BlackElo "2428"]
[PlyCount "97"]
[EventDate "2022.11.12"]
[EventType "swiss (blitz)"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. 0-0 Bg7 5. Nc3 d6 6. d4 cxd4 7. Nxd4 Bd7 8. Bxc6 bxc6 9. Be3 Nf6 10. f3 0-0 11. Qd2 Rb8 12. Rab1 Qc7 13. Rfd1 c5 14. Nde2 Be6 15. b3 Nd7 16. Nf4 Nb6 17. a4 Qb7 18. a5 Nd7 19. Ncd5 Bxd5 20. Nxd5 Nf6 21. Bh6 Nxd5 22. Bxg7 Kxg7 23. exd5 Rfe8 24. Re1 Qb4 25. Rbd1 Qxd2 26. Rxd2 Rb5 27. Ra1 Rb4 28. Kf2 Kf6 29. Re2 Rd4 30. c4 Rb8 31. Rae1 Rxb3 32. Rxe7 Rb2+ 33. Kg3 Rdd2 34. Rd7 Rxg2+ 35. Kf4 Rxh2 36. Rxd6+ Kg7 37. Rc6 Rh4+ 38. Ke5 Rxc4 39. Rd1 Re2+ 40. Kd6 Rd4 41. Rxd4 cxd4 42. Rc4 d3 43. Rd4 d2 44. Kc7 Kf6 45. d6 Ke5 46. Rd3 d1Q 47. Rxd1 Rc2+ 48. Kb7 Rb2+ 49. Kxa7 1-0

[Event "Speed Chess Q2"]
[Site "Chess.com INT"]
[Date "2022.11.12"]
[Round "11"]
[White "Costello, Alexander"]
[Black "Mouhamad, Joachin"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "2224"]
[BlackElo "2266"]
[PlyCount "77"]
[EventDate "2022.11.12"]
[EventType "swiss (blitz)"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. Nf3 d5 2. e3 Nf6 3. c4 e6 4. Be2 Bd6 5. 0-0 0-0 6. Nc3 b6 7. cxd5 exd5 8. d4 a6 9. Bd2 Bb7 10. Rc1 Nbd7 11. Re1 Ne4 12. Bf1 f5 13. g3 Ndf6 14. Ne2 Ng4 15. Qb3 Ngxf2 16. Nf4 c6 17. Ne6 Qe7 18. Nxf8 Rxf8 19. Qxb6 g5 20. Ba5 g4 21. Ne5 Rb8 22. Rc2 Ba8 23. Qxa6 c5 24. Nc6 Bxc6 25. Qxc6 Qe6 26. dxc5 Rc8 27. Qa6 Rxc5 28. Rxc5 Nxc5 29. Qa8+ Kf7 30. Qh8 Nfe4 31. Qxh7+ Kf8 32. Bd8 Be5 33. b4 Nd7 34. Bb5 Ndf6 35. Qg6 Bd6 36. Rf1 Bxb4 37. Qxf5 Bd2 38. Qxe6 Bxe3+ 39. Kh1 1-0

[Event "Speed Chess Q2"]
[Site "Chess.com INT"]
[Date "2022.11.12"]
[Round "3"]
[White "Costello, Alexander"]
[Black "Pakleza, Zbigniew"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "2224"]
[BlackElo "2496"]
[PlyCount "70"]
[EventDate "2022.11.12"]
[EventType "swiss (blitz)"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. f3 Nbd7 4. Be3 e5 5. d5 Be7 6. c4 0-0 7. Qd2 Ne8 8. Nc3 g6 9. g4 Ng7 10. 0-0-0 f5 11. gxf5 gxf5 12. Bh3 f4 13. Bf2 Kh8 14. Nge2 Nf6 15. Bxc8 Qxc8 16. h4 Nfh5 17. Rdg1 Rg8 18. Kb1 a6 19. Rg2 Qd7 20. Nc1 Ne8 21. Rxg8+ Kxg8 22. Nd3 b6 23. b4 a5 24. Ka1 Kf7 25. bxa5 Rxa5 26. Nb4 Nef6 27. Nc6 Ra8 28. Nb5 Qc8 29. Rg1 Nd7 30. Nxe7 Kxe7 31. Rg5 Nhf6 32. h5 Kf7 33. Bh4 Nc5 34. Rf5 Nb3+ 35. Kb2 Nxd2 0-1

[Event "Speed Chess Q2"]
[Site "Chess.com INT"]
[Date "2022.11.12"]
[Round "9"]
[White "Costello, Alexander"]
[Black "Ristic, Nebojsa M"]
[Result "0-1"]
[ECO "A16"]
[WhiteElo "2224"]
[BlackElo "2335"]
[PlyCount "110"]
[EventDate "2022.11.12"]
[EventType "swiss (blitz)"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 b6 3. e4 d6 4. d4 Nbd7 5. g4 h6 6. Be3 e5 7. d5 Nc5 8. f3 a5 9. Qd2 a4 10. 0-0-0 Be7 11. Nge2 Ba6 12. Ng3 Nfd7 13. h4 Bxh4 14. Nf5 Bf6 15. g5 g6 16. Nxh6 Bg7 17. Qg2 Qe7 18. Be2 0-0-0 19. Ng4 Kb8 20. Kb1 Rdf8 21. Rxh8 Rxh8 22. Rh1 Qd8 23. Kc2 Bc8 24. b4 axb3+ 25. axb3 Na6 26. Kb2 Ndc5 27. Rxh8 Qxh8 28. Nh6 Qe8 29. Qh2 Nb4 30. Nb5 Bd7 31. Nc3 Nbd3+ 32. Bxd3 Nxd3+ 33. Kc2 Ne1+ 34. Kb2 Nxf3 35. Qf2 Bxh6 36. gxh6 Bg4 37. Bg5 Qh8 38. Nb5 Nxg5 39. Nxd6 f5 40. c5 cxd6 41. cxd6 Qd8 42. h7 Nxh7 43. Qh2 Nf6 44. Qxe5 Nxe4 45. d7+ Kb7 46. Qe6 Nc5 47. Qc6+ Kb8 48. Qd6+ Ka7 49. b4 Qxd7 50. bxc5 Qxd6 51. cxd6 f4 52. Kc3 Bd7 53. Kd4 g5 54. Ke4 b5 55. Kd4 f3 0-1

[Event "Speed Chess Q2"]
[Site "Chess.com INT"]
[Date "2022.11.12"]
[Round "12"]
[White "Costello, Alexander"]
[Black "Sadovsky, Artem"]
[Result "1-0"]
[ECO "B15"]
[WhiteElo "2224"]
[BlackElo "2276"]
[PlyCount "91"]
[EventDate "2022.11.12"]
[EventType "swiss (blitz)"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nf3 c6 4. Nc3 d5 5. h3 dxe4 6. Nxe4 Nd7 7. Bf4 Ngf6 8. Nxf6+ Nxf6 9. Bd3 0-0 10. 0-0 Nd5 11. Bd2 b5 12. a4 Qb6 13. axb5 cxb5 14. Qe2 b4 15. c4 bxc3 16. bxc3 a5 17. Rfb1 Qc7 18. c4 Nf4 19. Bxf4 Qxf4 20. Qe4 Qxe4 21. Bxe4 Ra7 22. Bc6 Bf5 23. Rb5 a4 24. Ra3 Rc8 25. d5 Bb2 26. Rxb2 Kg7 27. Nd4 Bd7 28. Nb5 Rb8 29. Nxa7 Rxb2 30. Bxd7 Rb7 31. Rxa4 Rxd7 32. c5 Rxd5 33. Rc4 Rd1+ 34. Kh2 Rc1 35. Rxc1 g5 36. c6 g4 37. c7 g3+ 38. Kxg3 f5 39. c8Q f4+ 40. Kxf4 e5+ 41. Kxe5 Kh6 42. Qe6+ Kh5 43. Qf5+ Kh6 44. Rc6+ Kg7 45. Qf6+ Kg8 46. Rc8# 1-0

[Event "Speed Chess Q2"]
[Site "Chess.com INT"]
[Date "2022.11.12"]
[Round "2"]
[White "Costello, Alexander"]
[Black "Srihari, LR."]
[Result "1-0"]
[ECO "D13"]
[WhiteElo "2224"]
[BlackElo "2436"]
[PlyCount "111"]
[EventDate "2022.11.12"]
[EventType "swiss (blitz)"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. Nf3 c5 2. c3 Nc6 3. d4 cxd4 4. cxd4 d5 5. Nc3 Nf6 6. Bf4 a6 7. Rc1 e6 8. e3 Bd6 9. Bg3 0-0 10. Bd3 h6 11. 0-0 Re8 12. Ne2 Qe7 13. Ne5 Bxe5 14. dxe5 Nh5 15. Nd4 Nxg3 16. Nxc6 bxc6 17. hxg3 c5 18. Bb1 g6 19. Qg4 Kg7 20. b3 Bd7 21. Bd3 Rec8 22. Rc2 Bb5 23. Rd1 Qg5 24. Qf4 Rc7 25. Bf1 Rac8 26. Rdc1 Bxf1 27. Kxf1 Qxf4 28. gxf4 g5 29. g3 Kg6 30. Ke2 a5 31. Kf3 h5 32. e4 d4 33. Rc4 f6 34. exf6 Kxf6 35. Rh1 Kg6 36. Rhc1 Rc6 37. Ra4 gxf4 38. gxf4 Kf6 39. Rxa5 c4 40. Rxc4 Rxc4 41. bxc4 Rxc4 42. Rxh5 Ra4 43. e5+ Kg7 44. Rg5+ Kf7 45. f5 exf5 46. Rxf5+ Ke6 47. Kg4 d3+ 48. f4 Rd4 49. Rf6+ Ke7 50. Rd6 Rxd6 51. exd6+ Kxd6 52. Kf3 d2 53. Ke2 Ke6 54. Kxd2 Kf5 55. a4 Kxf4 56. a5 1-0

[Event "Speed Chess Q2"]
[Site "Chess.com INT"]
[Date "2022.11.12"]
[Round "5"]
[White "Donchenko, Alexander"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "A07"]
[WhiteElo "2645"]
[BlackElo "2224"]
[PlyCount "73"]
[EventDate "2022.11.12"]
[EventType "swiss (blitz)"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 Bg4 4. h3 Bxf3 5. Bxf3 c6 6. 0-0 Nbd7 7. d3 e6 8. Bg2 h5 9. Bg5 Be7 10. c4 Qb6 11. Qb3 Nc5 12. Qc2 dxc4 13. dxc4 Nfd7 14. Be3 Qc7 15. b4 Bf6 16. Nc3 Na6 17. a3 0-0 18. Rad1 Rad8 19. Ne4 Be7 20. h4 Ne5 21. Bf4 f6 22. Rd3 Nb8 23. Rfd1 Rxd3 24. exd3 g5 25. hxg5 fxg5 26. Nxg5 Bxg5 27. Bxg5 Nf3+ 28. Bxf3 Rxf3 29. d4 Rf5 30. Bf4 Qd8 31. d5 cxd5 32. cxd5 Rxd5 33. Qg6+ Kf8 34. Bh6+ Ke7 35. Bg5+ Kd7 36. Rxd5+ exd5 37. Qf5+ 1-0

[Event "Speed Chess Q2"]
[Site "Chess.com INT"]
[Date "2022.11.12"]
[Round "13"]
[White "Koc, Przemyslaw"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "2346"]
[BlackElo "2224"]
[PlyCount "71"]
[EventDate "2022.11.12"]
[EventType "swiss (blitz)"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Bg5 Ne4 3. Bf4 d5 4. Nd2 Bf5 5. f3 Nf6 6. g4 Bg6 7. h4 h6 8. h5 Bh7 9. c3 c5 10. Qb3 Qb6 11. dxc5 Qxb3 12. axb3 Nc6 13. b4 e5 14. Bg3 Be7 15. b5 Nb8 16. Bxe5 Nbd7 17. Bd6 Nxc5 18. Bxe7 Kxe7 19. Nh3 Rhe8 20. Nf4 Kd6 21. Kf2 Nfd7 22. Rd1 Bc2 23. Nc4+ Ke7 24. Nxd5+ Kf8 25. Rd2 Bb3 26. e4 Bxc4 27. Bxc4 Rac8 28. Be2 Ne5 29. Ne3 Red8 30. Rhd1 Rxd2 31. Rxd2 Ke8 32. Nf5 Nxg4+ 33. fxg4 Nxe4+ 34. Ke3 Nxd2 35. Nd6+ Kd7 36. Nxc8 1-0

[Event "Speed Chess Q2"]
[Site "Chess.com INT"]
[Date "2022.11.12"]
[Round "4"]
[White "Meier, Georg"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "A05"]
[WhiteElo "2615"]
[BlackElo "2224"]
[PlyCount "80"]
[EventDate "2022.11.12"]
[EventType "swiss (blitz)"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. b3 Ne4 5. c3 d5 6. Bb2 c5 7. d3 Nd6 8. Nbd2 Nc6 9. 0-0 0-0 10. e4 dxe4 11. dxe4 c4 12. e5 Nxe5 13. Nxe5 Bxe5 14. Nxc4 Nxc4 15. bxc4 Be6 16. Bd5 Qd6 17. Re1 Bxd5 18. Qxd5 Qxd5 19. cxd5 Bd6 20. a4 Rac8 21. Re3 Rc4 22. Kf1 Rfc8 23. Ke2 R4c5 24. Rd1 Rc4 25. Ra1 R4c5 26. Rd3 Ra5 27. Kd2 Rc4 28. Kc2 Raxa4 29. Rxa4 Rxa4 30. Kb3 Ra5 31. c4 b5 32. h3 bxc4+ 33. Kxc4 Ra4+ 34. Kb3 Rb4+ 35. Kc2 a5 36. Bc3 Rb5 37. g4 f6 38. Bd2 a4 39. Bc1 Rc5+ 40. Kd1 Rc4 0-1

[Event "Speed Chess Q2"]
[Site "Chess.com INT"]
[Date "2022.11.12"]
[Round "10"]
[White "Melian, Juan Sebastian"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "E38"]
[WhiteElo "2150"]
[BlackElo "2224"]
[PlyCount "47"]
[EventDate "2022.11.12"]
[EventType "swiss (blitz)"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 0-0 5. Nf3 c5 6. a3 cxd4 7. axb4 dxc3 8. bxc3 b6 9. Bg5 h6 10. Bh4 d6 11. e3 Nbd7 12. Rd1 Qc7 13. Bd3 Bb7 14. 0-0 Bxf3 15. gxf3 Ne5 16. Qe2 Rac8 17. Bxf6 gxf6 18. Kh1 Nxd3 19. Qxd3 Qxc4 20. Qxd6 Qxc3 21. Rd4 f5 22. Qe5 Kh7 23. Qf6 Qc7 24. Rh4 1-0

[Event "Speed Chess Q2"]
[Site "Chess.com INT"]
[Date "2022.11.12"]
[Round "1"]
[White "Nenezic, Marko"]
[Black "Costello, Alexander"]
[Result "1/2-1/2"]
[ECO "E40"]
[WhiteElo "2510"]
[BlackElo "2224"]
[PlyCount "96"]
[EventDate "2022.11.12"]
[EventType "swiss (blitz)"]
[EventRounds "14"]
[EventCountry "USA"]
[SourceTitle "CBM 211 Extra"]
[Source "ChessBase"]
[SourceDate "2023.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 d5 5. a3 Be7 6. b4 a5 7. b5 c5 8. bxc6 Nxc6 9. Nf3 0-0 10. Rb1 Ne4 11. Qc2 Nxc3 12. Qxc3 Rb8 13. Bd3 Bd7 14. 0-0 dxc4 15. Bxc4 Bd6 16. e4 Ne7 17. Bb5 Bc6 18. Qd3 Qd7 19. Bd2 a4 20. Qc4 Bxb5 21. Rxb5 Rfc8 22. Qxa4 Ra8 23. Qb3 Rxa3 24. Qb1 Rb8 25. Rc1 h6 26. h3 Nc6 27. d5 exd5 28. Rxd5 Qe6 29. Be3 Be7 30. Rb5 Ra4 31. Rxb7 Rba8 32. Qb5 Ra1 33. e5 Rxc1+ 34. Bxc1 Ra1 35. Qb2 Ra2 36. Qc3 Qd5 37. Kh2 Rxf2 38. Rb6 Bc5 39. Rb5 Nd4 40. Qxc5 Rxg2+ 41. Kxg2 Qxf3+ 42. Kh2 Qf2+ 43. Kh1 Qf1+ 44. Kh2 Qf2+ 45. Kh1 Qe1+ 46. Kg2 Qe2+ 47. Kg3 Qf3+ 48. Kh2 Qf2+ 1/2-1/2

[Event "US op 122nd"]
[Site "Rancho Mirage"]
[Date "2022.08.07"]
[Round "9"]
[White "Costello, Alexander"]
[Black "Akobian, Varuzhan"]
[Result "1/2-1/2"]
[ECO "B17"]
[WhiteElo "2232"]
[BlackElo "2591"]
[PlyCount "143"]
[EventDate "2022.07.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Bd3 Ngf6 6. Ng5 e6 7. Qe2 Bd6 8. N1f3 h6 9. Ne4 Nxe4 10. Qxe4 Nf6 11. Qe2 b6 12. 0-0 Bb7 13. b3 Qc7 14. c4 0-0 15. Bb2 Rfe8 16. Rac1 c5 17. dxc5 Bf4 18. Bxf6 gxf6 19. Rcd1 f5 20. cxb6 axb6 21. Rfe1 Bxf3 22. Qxf3 Bxh2+ 23. Kh1 Bd6 24. a4 Rad8 25. g3 Bb4 26. Rf1 Rd4 27. Be2 Bd2 28. Bd3 Bb4 29. Be2 Red8 30. Rxd4 Rxd4 31. Rd1 Qd6 32. Rd3 Bc5 33. Kg2 Kg7 34. Qe3 Rxd3 35. Qxd3 Qe5 36. Qd2 Qe4+ 37. Bf3 Qb1 38. Qc3+ Kg8 39. Qd2 Kg7 40. Qc3+ Kg8 41. Qd2 Qxb3 42. Qxh6 Be7 43. Qf4 Qxa4 44. Qc7 Qb4 45. Qb8+ Bf8 46. Qc7 Be7 47. Qb8+ Kg7 48. Qe8 Bf6 49. Bh5 Qe7 50. Qxe7 Bxe7 51. f4 Bc5 52. Kf3 f6 53. Be8 Kf8 54. Bd7 Ke7 55. Bc8 Kd6 56. Ke2 Bb4 57. Kf2 Bc3 58. Ke2 Bb2 59. Kf2 Bc1 60. Kf3 Bd2 61. Ke2 Bc1 62. Kf3 e5 63. Bxf5 Kc5 64. fxe5 fxe5 65. Ke4 Kxc4 66. Kxe5 b5 67. g4 b4 68. Be6+ Kc3 69. Kf5 b3 70. Bxb3 Kxb3 71. g5 Bxg5 72. Kxg5 1/2-1/2

[Event "US op 122nd"]
[Site "Rancho Mirage"]
[Date "2022.08.06"]
[Round "8"]
[White "Atwell, Rose"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "B40"]
[WhiteElo "1854"]
[BlackElo "2232"]
[PlyCount "86"]
[EventDate "2022.07.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. b3 a6 4. Bb2 Nc6 5. c4 Nf6 6. e5 Ng4 7. Bd3 d6 8. exd6 Qxd6 9. Be4 Bd7 10. 0-0 0-0-0 11. h3 Nf6 12. Bc2 Be8 13. Nc3 Nd4 14. Ne4 Nxe4 15. Bxe4 Bc6 16. Bxc6 Nxc6 17. Ng5 Qe7 18. Ne4 f5 19. Nc3 Qd7 20. Qe1 Bd6 21. Na4 Kb8 22. Qe3 Qe7 23. f4 Rhe8 24. Kh1 Nb4 25. Qe2 g5 26. d4 cxd4 27. Bxd4 gxf4 28. c5 Bc7 29. Bc3 Nd5 30. c6 Nxc3 31. Nxc3 Qc5 32. Rac1 Qxc6 33. Na4 Qe4 34. Qb2 Be5 35. Qf2 Bd4 36. Qc2 Qxc2 37. Rxc2 Rc8 38. Rd2 e5 39. g3 fxg3 40. Kg2 f4 41. Nb2 Be3 42. Re2 e4 43. Rxe3 Rc2+ 0-1

[Event "US op 122nd"]
[Site "Rancho Mirage"]
[Date "2022.08.05"]
[Round "7"]
[White "Costello, Alexander"]
[Black "Oen, Grant"]
[Result "1-0"]
[ECO "B40"]
[WhiteElo "2232"]
[BlackElo "2001"]
[PlyCount "78"]
[EventDate "2022.07.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. b3 b6 4. Bb2 Bb7 5. Nc3 Be7 6. d4 cxd4 7. Nxd4 a6 8. Qg4 Bf6 9. 0-0-0 Ne7 10. f4 Ng6 11. e5 h5 12. Qg3 Bh4 13. Qe3 Nxf4 14. Ne4 Bxe4 15. Qxe4 Nd5 16. c4 Nc7 17. Bd3 g6 18. Qb7 0-0 19. Ba3 Qc8 20. Qf3 Nc6 21. Nxc6 dxc6 22. Qxc6 Rd8 23. Be4 Ra7 24. Qxb6 Rxd1+ 25. Rxd1 Nb5 26. Bd6 Rd7 27. Bc6 Nxd6 28. Bxd7 Qxd7 29. exd6 e5 30. Qe3 f6 31. Qe4 Bg5+ 32. Kb1 Kg7 33. c5 f5 34. Qd5 f4 35. Qe4 Qg4 36. Kc2 Qh4 37. Rd2 Qxh2 38. d7 Qg1 39. Qxe5+ Kh7 1-0

[Event "US op 122nd"]
[Site "Rancho Mirage"]
[Date "2022.08.04"]
[Round "6"]
[White "Eidelman, Gabriel"]
[Black "Costello, Alexander"]
[Result "1/2-1/2"]
[ECO "E60"]
[WhiteElo "2209"]
[BlackElo "2232"]
[PlyCount "74"]
[EventDate "2022.07.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. f3 e6 4. e4 d5 5. e5 Nh5 6. Be3 dxc4 7. g4 Ng7 8. Nc3 Be7 9. Bxc4 Bd7 10. Nge2 Bc6 11. Ng3 h5 12. 0-0 Nd7 13. Bb3 Nb6 14. Qd2 Qd7 15. Bh6 Rg8 16. Rad1 0-0-0 17. Bxg7 Rxg7 18. Qh6 Rgg8 19. gxh5 gxh5 20. Qxh5 Rg7 21. Kh1 Nd5 22. Bxd5 Bxd5 23. Nge2 Bc6 24. Rg1 Rgg8 25. Rxg8 Rxg8 26. Rg1 Qe8 27. Rxg8 Qxg8 28. h3 b6 29. Kh2 Kb7 30. Qg4 Qh7 31. Ne4 Bd5 32. b3 Bh4 33. Qf4 Bc6 34. Qe3 a5 35. N2c3 Qf5 36. Ne2 Qh7 37. N2c3 Qf5 1/2-1/2

[Event "US op 122nd"]
[Site "Rancho Mirage"]
[Date "2022.08.03"]
[Round "5"]
[White "Costello, Alexander"]
[Black "Wang, Andrew"]
[Result "1-0"]
[ECO "D90"]
[WhiteElo "2232"]
[BlackElo "2131"]
[PlyCount "82"]
[EventDate "2022.07.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. d4 Bg7 4. Nc3 d5 5. Qa4+ Nc6 6. Ne5 Bd7 7. Nxd7 Qxd7 8. e3 0-0 9. cxd5 Nxd5 10. Qb3 Nxc3 11. bxc3 e5 12. d5 Na5 13. Qb4 b6 14. e4 c6 15. Qa4 Qc7 16. dxc6 Nxc6 17. Bg5 h6 18. Be3 f5 19. Bc4+ Kh8 20. 0-0 f4 21. Bc1 Na5 22. Bd5 Rab8 23. Ba3 Rfc8 24. Bb4 Nc4 25. Qa6 f3 26. Be6 Nd2 27. Rfd1 Nxe4 28. Bxc8 Rxc8 29. Qd3 Nxc3 30. Bxc3 Qxc3 31. Qxc3 Rxc3 32. Rac1 Rxc1 33. Rxc1 fxg2 34. Rc7 Bf8 35. Rxa7 Bc5 36. Kxg2 Kg8 37. f3 h5 38. Kf1 Kf8 39. Ke2 h4 40. h3 Be7 41. Rb7 Ke8 1-0

[Event "US op 122nd"]
[Site "Rancho Mirage"]
[Date "2022.08.02"]
[Round "4"]
[White "Khanin, Semen"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "E41"]
[WhiteElo "2550"]
[BlackElo "2232"]
[PlyCount "75"]
[EventDate "2022.07.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 c5 6. Nge2 cxd4 7. exd4 b6 8. 0-0 Bb7 9. a3 Be7 10. d5 Re8 11. Bc2 Na6 12. b4 exd5 13. cxd5 Bd6 14. Qd3 g6 15. Bg5 Nc7 16. Ng3 h6 17. Bh4 Be5 18. Nge4 Bxc3 19. Nxc3 g5 20. Bg3 Ncxd5 21. Nb5 Ba6 22. Bb3 Bxb5 23. Qxb5 Nc3 24. Qf5 Ne2+ 25. Kh1 Kg7 26. Be5 Qe7 27. f4 gxf4 28. Bb2 Rac8 29. Rad1 Nc3 30. Qxf4 Qe5 31. Qxe5 Rxe5 32. Rd3 Nfe4 33. Rxd7 Kg6 34. Rdxf7 Nd2 35. Bc2+ Kg5 36. Rg7+ Kh5 37. Bxc3 Rxc3 38. Bd1+ 1-0

[Event "US op 122nd"]
[Site "Rancho Mirage"]
[Date "2022.08.01"]
[Round "3"]
[White "Costello, Alexander"]
[Black "Gasparyan, Davit"]
[Result "1-0"]
[ECO "B35"]
[WhiteElo "2232"]
[BlackElo "1765"]
[PlyCount "61"]
[EventDate "2022.07.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 0-0 8. Bb3 Re8 9. 0-0 d6 10. h3 Bd7 11. Qd3 Na5 12. f4 Nxb3 13. axb3 e5 14. fxe5 dxe5 15. Ndb5 Bxb5 16. Qxb5 b6 17. Rad1 Qc8 18. Bg5 Nh5 19. Rd7 f6 20. Be3 Kh8 21. Rfd1 f5 22. Bg5 h6 23. Be7 Rg8 24. R1d6 fxe4 25. Rxg6 Qe8 26. Qc6 Kh7 27. Rgd6 Nf4 28. Qxe4+ Kh8 29. Bg5 Qxd7 30. Rxd7 hxg5 31. Nd5 1-0

[Event "US op 122nd"]
[Site "Rancho Mirage"]
[Date "2022.07.31"]
[Round "2"]
[White "Lu, Yiding"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "B48"]
[WhiteElo "1800"]
[BlackElo "2232"]
[PlyCount "64"]
[EventDate "2022.07.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Qd2 Nf6 8. 0-0-0 b5 9. Nxc6 Qxc6 10. f3 Bb7 11. g4 d6 12. Ne2 Be7 13. Nd4 Qc7 14. Kb1 Nd7 15. Qf2 d5 16. exd5 Bxd5 17. Nf5 Bxa2+ 18. Kxa2 exf5 19. gxf5 Bf6 20. Bd4 0-0 21. f4 Rad8 22. Bxf6 Nxf6 23. Bd3 Nd5 24. c3 b4 25. Rhg1 f6 26. Bc2 bxc3 27. Rxd5 Rxd5 28. Bb3 Kh8 29. Bxd5 Qa5+ 30. Kb1 Qxd5 31. bxc3 Rb8+ 32. Kc1 Qd3 0-1

[Event "US op 122nd"]
[Site "Rancho Mirage"]
[Date "2022.07.30"]
[Round "1"]
[White "Costello, Alexander"]
[Black "Teitelman, Jacob"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "2232"]
[BlackElo "1700"]
[PlyCount "59"]
[EventDate "2022.07.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. Nf3 d5 2. e3 Nf6 3. c4 e6 4. Nc3 Be7 5. b3 0-0 6. Bb2 b6 7. cxd5 exd5 8. Qc2 Bb7 9. d4 Nbd7 10. Bd3 c5 11. 0-0 Rc8 12. Qe2 Re8 13. Rfd1 Ne4 14. dxc5 Bxc5 15. Na4 Bb4 16. Bxe4 Rxe4 17. a3 Bc5 18. Nc3 Re6 19. Nxd5 Bxd5 20. Rxd5 Qe7 21. b4 Bd6 22. Rad1 Nf6 23. Bxf6 Qxf6 24. Qd3 Be7 25. Nd4 Rd6 26. Qf5 Rxd5 27. Qxc8+ Rd8 28. Qb7 h6 29. Qxa7 Qc6 30. Qxe7 1-0

[Event "North American op 31st"]
[Site "Las Vegas"]
[Date "2021.12.27"]
[Round "3"]
[White "Costello, Alexander"]
[Black "Liang, Awonder"]
[Result "0-1"]
[ECO "B11"]
[WhiteElo "2243"]
[BlackElo "2597"]
[PlyCount "27"]
[EventDate "2021.12.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. e4 c6 2. Nc3 d5 3. Qf3 d4 4. Bc4 e6 5. Nce2 b5 6. Bb3 c5 7. d3 Nc6 8. Nh3 Bb7 9. 0-0 Nf6 10. Bg5 Be7 11. Qg3 0-0 12. Nef4 c4 13. Bh6 Ne8 14. Ng5 0-1

[Event "North American op 31st"]
[Site "Las Vegas"]
[Date "2021.12.27"]
[Round "4"]
[White "Gardezi, Arsal"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "B47"]
[WhiteElo "2016"]
[BlackElo "2243"]
[PlyCount "28"]
[EventDate "2021.12.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. g3 a6 7. Bg2 Nf6 8. 0-0 h5 9. Bg5 Bc5 10. Nxc6 dxc6 11. Na4 Ba7 12. c4 b5 13. cxb5 axb5 14. Nc3 Nd7 0-1

[Event "North American op 31st"]
[Site "Las Vegas"]
[Date "2021.12.26"]
[Round "2"]
[White "Shabalov, Alexander"]
[Black "Costello, Alexander"]
[Result "1/2-1/2"]
[ECO "C96"]
[WhiteElo "2504"]
[BlackElo "2243"]
[PlyCount "75"]
[EventDate "2021.12.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Na5 10. Bc2 c5 11. d4 Nd7 12. Nbd2 exd4 13. cxd4 Nc6 14. d5 Nce5 15. Nh2 Ng6 16. a4 Nb6 17. a5 Nd7 18. g3 c4 19. f4 Nc5 20. Ndf3 f5 21. e5 Bb7 22. e6 Rc8 23. Nf1 Bf6 24. Ne3 Ne7 25. g4 fxg4 26. hxg4 g6 27. f5 gxf5 28. Nxf5 Nxf5 29. Bxf5 Qe7 30. Re2 Nd3 31. Rh2 Bxd5 32. Be3 Rc7 33. Qe2 Be5 34. Nxe5 dxe5 35. Rf1 Qd6 36. Bh6 Qc5+ 37. Be3 Qd6 38. Bh6 1/2-1/2

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2021.06.18"]
[Round "4"]
[White "Yoo, Christopher Woojin"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "E15"]
[WhiteElo "2457"]
[BlackElo "2259"]
[PlyCount "119"]
[EventDate "2021.06.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Qa4 c5 6. Bg2 Bb7 7. 0-0 Be7 8. dxc5 bxc5 9. Nc3 Qb6 10. Bf4 0-0 11. Rfd1 d6 12. Rd2 h6 13. Rad1 e5 14. Be3 Nc6 15. Qb3 Qxb3 16. axb3 Rfb8 17. Nb5 Ne4 18. Rc2 Nb4 19. Rcc1 a6 20. Nc3 Nf6 21. h3 Nc6 22. Nd2 Nd4 23. Bxd4 exd4 24. Nd5 Kf8 25. Ra1 Bd8 26. Ra3 Nxd5 27. Bxd5 a5 28. Rda1 Ra7 29. h4 Bc8 30. Ne4 Bc7 31. e3 f5 32. Nd2 dxe3 33. fxe3 Bd8 34. e4 Bf6 35. Rxa5 Re7 36. Rb5 Rxb5 37. cxb5 Bb7 38. b6 fxe4 39. Bxb7 Rxb7 40. Ra8+ Ke7 41. Ra7 Rd7 42. b7 c4 43. b8Q Bd4+ 44. Kf1 Bxa7 45. Qg8 e3 46. Qxg7+ Kd8 47. Qf8+ Kc7 48. Nxc4 d5 49. Qf4+ Kb7 50. Nxe3 d4 51. Qe4+ Kb8 52. Nd5 Rf7+ 53. Ke2 Rf2+ 54. Kxf2 d3+ 55. Ke1 Bf2+ 56. Kxf2 d2 57. Qe8+ Kb7 58. Qd7+ Ka8 59. Qc8+ Ka7 60. Qc7+ 1-0

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2021.06.17"]
[Round "2"]
[White "Shetty, Atulya"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "A20"]
[WhiteElo "2461"]
[BlackElo "2259"]
[PlyCount "125"]
[EventDate "2021.06.16"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nf6 3. Bg2 c6 4. d4 e4 5. Qa4 Na6 6. Nc3 Bb4 7. Bd2 Bxc3 8. bxc3 0-0 9. Nh3 d5 10. 0-0 Bf5 11. cxd5 cxd5 12. Bg5 Nc7 13. f3 exf3 14. Rxf3 Qc8 15. Bxf6 Bxh3 16. Bxh3 Qxh3 17. g4 Qh6 18. Qd7 Ne6 19. Be7 Rfe8 20. Raf1 Qg6 21. h3 h5 22. Rxf7 hxg4 23. h4 Qe4 24. Bg5 g3 25. R1f3 Rf8 26. Qe7 Qb1+ 27. Rf1 Qg6 28. Rxf8+ Rxf8 29. Rxf8+ Nxf8 30. Qe5 Qf7 31. Qxg3 Ne6 32. Qe5 Qd7 33. Kg2 Nf8 34. Kg3 Ng6 35. Qb8+ Kf7 36. h5 Nf8 37. Qe5 Ne6 38. Qf5+ Kg8 39. Bf4 Qc6 40. Kg4 Nxf4 41. Kxf4 Qc7+ 42. Qe5 Qf7+ 43. Kg5 Qd7 44. h6 gxh6+ 45. Kxh6 Qc6+ 46. Kg5 Kf7 47. Qf5+ Ke7 48. Qh7+ Kd8 49. Qf7 Kc8 50. Kf5 Qxc3 51. Qxd5 Qh3+ 52. Kf4 Qh6+ 53. Qg5 Qh2+ 54. Ke3 Qh3+ 55. Kd2 Qa3 56. Qc5+ Qxc5 57. dxc5 Kd7 58. Kd3 Kc6 59. Kc4 a5 60. a4 b6 61. cxb6 Kxb6 62. Kd5 Kc7 63. Kc5 1-0

[Event "World op 48th"]
[Site "ICC INT"]
[Date "2020.08.09"]
[Round "9"]
[White "Costello, Alexander"]
[Black "Lee, Alice"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "2259"]
[BlackElo "1967"]
[PlyCount "100"]
[EventDate "2020.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[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. Bxf6 Bxf6 11. c3 0-0 12. Nc2 Rb8 13. Be2 Bg5 14. 0-0 Ne7 15. Ncb4 Bb7 16. Qd3 Nxd5 17. Nxd5 Bxd5 18. Qxd5 Qc7 19. Rfd1 Rfd8 20. Rd3 Qc4 21. b3 Qc5 22. g3 Be7 23. h4 Rbc8 24. Qxc5 dxc5 25. a4 Rxd3 26. Bxd3 Rb8 27. axb5 axb5 28. Ra5 Bd8 29. Rxb5 Rxb5 30. Bxb5 Ba5 31. c4 f6 32. Bc6 Kf7 33. Bd5+ Kg6 34. Kg2 Bb4 35. Kh3 Be1 36. Kg2 Bb4 37. Be6 h5 38. Kf3 Kh6 39. Ke2 g5 40. Bf7 Ba3 41. hxg5+ Kxg5 42. Ke3 Bc1+ 43. Kf3 Ba3 44. Kg2 h4 45. f4+ exf4 46. gxh4+ Kxh4 47. Kf3 Kg5 48. Be6 Bb4 49. Bh3 Ba3 50. Bg2 Bb4 1/2-1/2

[Event "World op 48th"]
[Site "ICC INT"]
[Date "2020.08.09"]
[Round "7"]
[White "Costello, Alexander"]
[Black "Zong, Davis Jr"]
[Result "0-1"]
[ECO "D46"]
[WhiteElo "2259"]
[BlackElo "2129"]
[PlyCount "108"]
[EventDate "2020.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. e3 e6 5. Nc3 Nbd7 6. Qc2 Bd6 7. Bd3 dxc4 8. Bxc4 b5 9. Bd3 Bb7 10. 0-0 0-0 11. e4 e5 12. dxe5 Nxe5 13. Nxe5 Bxe5 14. f4 Bd4+ 15. Kh1 Ng4 16. Qe2 Nxh2 17. Rd1 Bc8 18. f5 Be5 19. Qh5 Qc7 20. Be3 g6 21. Qh4 Bg3 22. Qh3 h5 23. Be2 Re8 24. Bg1 b4 25. Bxh2 Bxh2 26. Qxh2 Qxh2+ 27. Kxh2 bxc3 28. bxc3 gxf5 29. e5 Kg7 30. Bf3 Rxe5 31. Bxc6 Rb8 32. Rd8 Rc5 33. Bd7 Ra8 34. Rxc8 Raxc8 35. Bxc8 Rxc8 36. Rc1 Rc4 37. Kg3 Kf6 38. Kf3 h4 39. Ke3 Ke6 40. Kd3 Rg4 41. Rc2 Kd5 42. Rf2 Rg3+ 43. Kc2 Ke4 44. c4 f4 45. c5 Rg5 46. Re2+ Kd4 47. Kb3 Rxc5 48. Re7 Rf5 49. Rxa7 h3 50. gxh3 f3 51. Rd7+ Ke3 52. Re7+ Kf4 53. Re1 f2 54. Rc1 Kg3 0-1

[Event "World op 48th"]
[Site "ICC INT"]
[Date "2020.08.09"]
[Round "8"]
[White "Wang, Alex Yuxuan"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "E60"]
[WhiteElo "1983"]
[BlackElo "2259"]
[PlyCount "60"]
[EventDate "2020.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 d6 6. c4 c6 7. b3 Nbd7 8. Bb2 Qc7 9. Nbd2 e5 10. e4 a5 11. a3 exd4 12. Nxd4 Re8 13. Qc2 Qb6 14. Rad1 Nc5 15. Rfe1 Ng4 16. h3 Ne5 17. Nf1 Be6 18. Kh2 a4 19. b4 Bxc4 20. bxc5 dxc5 21. Ne2 Bb3 22. Qb1 Bxd1 23. Rxd1 Qxb2 24. Qxb2 Ng4+ 25. hxg4 Bxb2 26. Rb1 Bxa3 27. Ne3 Bb4 28. Nc1 Red8 29. Bf1 b5 30. Kg2 Rd2 0-1

[Event "World op 48th"]
[Site "ICC INT"]
[Date "2020.08.08"]
[Round "5"]
[White "Costello, Alexander"]
[Black "Nathan, Krishna"]
[Result "0-1"]
[ECO "D15"]
[WhiteElo "2259"]
[BlackElo "2022"]
[PlyCount "84"]
[EventDate "2020.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. e3 a6 5. Nc3 b5 6. cxd5 cxd5 7. Bd3 e6 8. 0-0 Bd6 9. Ne5 0-0 10. f4 Bb7 11. Bd2 Ne4 12. Qc2 f5 13. Be1 Nd7 14. a4 b4 15. Nxe4 fxe4 16. Be2 Nxe5 17. fxe5 Rxf1+ 18. Bxf1 Be7 19. a5 Qd7 20. Rc1 Rc8 21. Qd1 Rc7 22. Rxc7 Qxc7 23. Qg4 Bc8 24. h4 Qxa5 25. h5 Bd7 26. Bh4 Bf8 27. Kh2 b3 28. Be2 Qd2 29. Bxa6 Qxb2 30. Bb5 Bxb5 31. Qxe6+ Kh8 32. Qf7 Qa3 33. e6 Bd6+ 34. g3 Qb2+ 35. Kh3 Qe2 36. Qb7 Qf1+ 37. Kh2 Qf2+ 38. Kh3 Bf1+ 39. Kg4 Qf3+ 40. Kg5 Qf6+ 41. Kg4 Qxe6+ 42. Kg5 h6# 0-1

[Event "World op 48th"]
[Site "ICC INT"]
[Date "2020.08.08"]
[Round "6"]
[White "Khattar, Tanmay"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "D85"]
[WhiteElo "2027"]
[BlackElo "2259"]
[PlyCount "50"]
[EventDate "2020.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Be3 c5 8. Qd2 0-0 9. Rc1 Nd7 10. h4 e5 11. d5 f5 12. Bg5 Nf6 13. c4 Nxe4 14. Bxd8 Nxd2 15. Be7 Rf7 16. Bxc5 Nxf1 17. Kxf1 b6 18. Ba3 Ba6 19. Ne2 Rc8 20. c5 bxc5 21. Rh3 Rd7 22. Rhc3 Rxd5 23. Bxc5 e4 24. Bd4 Rxc3 25. Bxc3 Bxc3 0-1

[Event "World op 48th"]
[Site "ICC INT"]
[Date "2020.08.08"]
[Round "4"]
[White "Woodward, Andy"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "E38"]
[WhiteElo "1899"]
[BlackElo "2259"]
[PlyCount "69"]
[EventDate "2020.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 Na6 6. a3 Bxc3+ 7. Qxc3 Nxc5 8. b4 Nce4 9. Qd4 d5 10. c5 b6 11. f3 bxc5 12. bxc5 0-0 13. fxe4 Nxe4 14. g3 e5 15. Qb4 Bd7 16. Qb7 Bc6 17. Qb2 d4 18. Bg2 Qa5+ 19. Bd2 Nxd2 20. Bxc6 Nb3+ 21. Kf2 Rab8 22. Rb1 Qxc5 23. Ba4 d3+ 24. Kg2 Nd2 25. Qxb8 dxe2 26. Nxe2 Qd5+ 27. Kh3 Ne4 28. Rhf1 Ng5+ 29. Kh4 Qe4+ 30. Nf4 exf4 31. Qxf8+ Kxf8 32. Rb8+ Ke7 33. Re8+ Kd6 34. Rxe4 Nxe4 35. gxf4 1-0

[Event "World op 48th"]
[Site "ICC INT"]
[Date "2020.08.07"]
[Round "2"]
[White "Costello, Alexander"]
[Black "Quirke, Jeffrey"]
[Result "1-0"]
[ECO "B15"]
[WhiteElo "2259"]
[BlackElo "2107"]
[PlyCount "113"]
[EventDate "2020.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. e4 c6 2. Nc3 d5 3. Qf3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. Bc4 Bd6 7. d4 0-0 8. Ne2 Re8 9. 0-0 Nd7 10. c3 Nf8 11. Ng3 Qc7 12. h3 Ng6 13. Nf5 Bh2+ 14. Kh1 Bf4 15. Bxf4 Nxf4 16. Ne3 Be6 17. Rfe1 Bxc4 18. Nxc4 Nd5 19. g3 Re6 20. Rxe6 fxe6 21. Re1 Re8 22. Qg4 Qd7 23. Kg1 g6 24. Nd2 Kg7 25. h4 b6 26. Nf3 h5 27. Qe4 Qd6 28. c4 Nc7 29. Kg2 Rd8 30. g4 hxg4 31. Qxg4 Rh8 32. Re3 Rh5 33. Qe4 Rf5 34. Qg4 Qf4 35. Qxf4 Rxf4 36. Ra3 a5 37. c5 bxc5 38. Rxa5 Nb5 39. dxc5 Rc4 40. a4 Nd4 41. Nxd4 Rxd4 42. Ra7+ Kf8 43. Ra6 Rb4 44. Rxc6 Rxb2 45. Rxe6 Kf7 46. Re4 Rc2 47. a5 Rxc5 48. Ra4 Rc7 49. a6 Ra7 50. Kg3 Ke6 51. Ra5 Kd6 52. f4 Ke6 53. f5+ gxf5 54. Kf4 Kd6 55. Kxf5 Kc6 56. Ra1 Kb6 57. Kxf6 1-0

[Event "World op 48th"]
[Site "ICC INT"]
[Date "2020.08.07"]
[Round "3"]
[White "Costello, Alexander"]
[Black "Sevian, Samuel"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "2259"]
[BlackElo "2660"]
[PlyCount "120"]
[EventDate "2020.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 Ne7 6. 0-0 h6 7. Nbd2 Nd7 8. a4 Qc7 9. Nb3 g5 10. h4 g4 11. Ne1 c5 12. Bxg4 Bxg4 13. Qxg4 cxd4 14. Nxd4 Nxe5 15. Qh5 N7g6 16. Nd3 Nxd3 17. cxd3 Qe5 18. Qxe5 Nxe5 19. Rd1 Kd7 20. Bd2 Rg8 21. Bc3 Ng6 22. Nf3 Be7 23. h5 Nf4 24. Ne5+ Ke8 25. g3 Nxh5 26. Rac1 Ng7 27. Ng4 Nf5 28. Nf6+ Bxf6 29. Bxf6 Kd7 30. Rc2 Rac8 31. Rdc1 Rxc2 32. Rxc2 h5 33. Be5 Rc8 34. Rxc8 Kxc8 35. Kg2 Kd7 36. Bf6 Kd6 37. d4 Kc6 38. Kf3 b5 39. b3 Nd6 40. Be7 Ne4 41. Bb4 bxa4 42. bxa4 f6 43. Ke3 a6 44. Be1 Nd6 45. Bc3 Nc4+ 46. Kf3 Nb6 47. a5 Nc4 48. g4 hxg4+ 49. Kxg4 Kb5 50. Kh5 Nxa5 51. Kg6 Nb3 52. Kxf6 Kc4 53. Bb2 Nxd4 54. Bxd4 Kxd4 55. Kxe6 Kc4 56. f4 d4 57. f5 d3 58. f6 d2 59. f7 d1Q 60. f8Q Qd5+ 0-1

[Event "World op 48th"]
[Site "ICC INT"]
[Date "2020.08.07"]
[Round "1"]
[White "Xu, Kevin"]
[Black "Costello, Alexander"]
[Result "1/2-1/2"]
[ECO "D85"]
[WhiteElo "1798"]
[BlackElo "2259"]
[PlyCount "125"]
[EventDate "2020.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Bd2 Bg7 6. e4 Nxc3 7. Bxc3 0-0 8. Qd2 Nd7 9. Nf3 Nf6 10. Bd3 b6 11. 0-0 e6 12. Rac1 Bb7 13. Qe2 Qe7 14. a3 Nd7 15. Bb4 c5 16. dxc5 Nxc5 17. Rc2 Rac8 18. Rfc1 Rfd8 19. Bxc5 Rxc5 20. Rxc5 bxc5 21. Qc2 Bxb2 22. Qxb2 Rxd3 23. Ne5 Rd4 24. f3 Qf6 25. Qxb7 Qxe5 26. Qc8+ Kg7 27. Qxc5 Rd1+ 28. Kf2 Rd2+ 29. Kg1 Qb2 30. Qc3+ Qxc3 31. Rxc3 Ra2 32. e5 g5 33. h3 h5 34. g4 h4 35. Rb3 Kg6 36. Rc3 a5 37. Rb3 a4 38. Rc3 Kg7 39. Rd3 Kf8 40. Rc3 Ke8 41. Rd3 f6 42. exf6 Kf7 43. f4 Kxf6 44. fxg5+ Kxg5 45. Rf3 Kg6 46. Re3 Kf6 47. Rf3+ Ke5 48. Re3+ Kf4 49. Rc3 e5 50. Rc4+ e4 51. g5 Kg3 52. Rc3+ Kf4 53. g6 Rd2 54. g7 Rd8 55. Kf2 Re8 56. Rc7 e3+ 57. Ke2 Rg8 58. Rf7+ Ke4 59. Re7+ Kd4 60. Rd7+ Ke4 61. Re7+ Kf4 62. Rf7+ Ke4 63. Re7+ 1/2-1/2

[Event "PNWCC Online Masters"]
[Site "Chess.com INT"]
[Date "2020.05.25"]
[Round "8.18"]
[White "Costello, Alexander"]
[Black "Sarkar, Justin"]
[Result "0-1"]
[ECO "D24"]
[WhiteElo "2258"]
[BlackElo "2380"]
[PlyCount "82"]
[EventDate "2020.05.23"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 196 Extra"]
[Source "ChessBase"]
[SourceDate "2020.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.07.31"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. c4 dxc4 4. Nc3 a6 5. a4 Nc6 6. Bg5 h6 7. Bxf6 exf6 8. e3 Na5 9. Nd2 Be6 10. Qh5 Bb4 11. Rd1 Qd7 12. Be2 Bxc3 13. bxc3 Qxa4 14. 0-0 Qb5 15. Qf3 0-0 16. e4 f5 17. d5 fxe4 18. Nxe4 Bd7 19. Nf6+ gxf6 20. Rd4 f5 21. Qg3+ Kh7 22. Qxc7 Rg8 23. Bh5 Nb3 24. Rb1 Rg7 25. g3 f6 26. Rh4 Qxd5 27. Rd1 Bc6 28. Rxd5 Rxc7 29. Rxf5 Rf8 30. Rxc4 Re7 31. f3 Re5 32. Bg4 Rxf5 33. Bxf5+ Kg7 34. Rg4+ Kf7 35. Rh4 a5 36. Rxh6 a4 37. Rh7+ Ke8 38. Be4 Bxe4 39. fxe4 a3 40. Rxb7 a2 41. Rxb3 a1Q+ 0-1

[Event "PNWCC Online Masters"]
[Site "Chess.com INT"]
[Date "2020.05.25"]
[Round "7.13"]
[White "Hevia Alejano, Carlos Antonio"]
[Black "Costello, Alexander"]
[Result "1/2-1/2"]
[ECO "B48"]
[WhiteElo "2467"]
[BlackElo "2258"]
[PlyCount "165"]
[EventDate "2020.05.23"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 196 Extra"]
[Source "ChessBase"]
[SourceDate "2020.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. a3 Nf6 7. Be3 a6 8. Be2 Ne5 9. f4 Nc4 10. Bxc4 Qxc4 11. Qf3 d6 12. 0-0-0 Be7 13. g4 0-0 14. g5 Nd7 15. Rhg1 Re8 16. h4 b5 17. g6 fxg6 18. h5 g5 19. h6 g6 20. f5 Ne5 21. Qh1 b4 22. axb4 Qxb4 23. Bxg5 Rb8 24. Nb3 Qb7 25. fxg6 hxg6 26. h7+ Kh8 27. Ne2 Bxg5+ 28. Rxg5 Qe7 29. Rg3 Rf8 30. Qg1 Bb7 31. Qd4 Rbd8 32. Rxg6 Qxh7 33. Rgg1 Bxe4 34. Nc5 Bxc2 35. Rh1 Bxd1 36. Rxh7+ Kxh7 37. Nxe6 Rc8+ 38. Nc3 Rf1 39. Qh4+ Kg8 40. Ng5 Bg4+ 41. Kc2 Bf5+ 42. Kb3 Rb8+ 43. Ka2 Bc2 44. b4 Bd3 45. Nge4 Bxe4 46. Qxe4 Rf2+ 47. Ka1 Rf6 48. Nd5 Rf1+ 49. Ka2 Rf2+ 50. Ka1 Rf1+ 51. Ka2 Rbf8 52. Ne7+ Kf7 53. Nc6 Rf2+ 54. Ka3 Rf3+ 55. Ka4 Ke6 56. Nd4+ Kd7 57. Qb7+ Kd8 58. Ne6+ Ke8 59. Ng7+ Kd8 60. Ne6+ Ke8 61. Nxf8 Kxf8 62. Qxa6 Ke7 63. Qb7+ Ke6 64. Qc8+ Kd5 65. b5 Rf4+ 66. Kb3 Rf3+ 67. Ka4 Rf4+ 68. Ka5 Nc4+ 69. Ka6 Rf1 70. Qg8+ Kc5 71. Qg5+ d5 72. Qe7+ Kd4 73. b6 Ra1+ 74. Kb7 Rb1 75. Qf6+ Kc5 76. Qf8+ Kd4 77. Qf2+ Kc3 78. Qg3+ Kd4 79. Qg7+ Kc5 80. Qf8+ Kd4 81. Qf6+ Ke3 82. Qe6+ Kd4 83. Qf6+ 1/2-1/2

[Event "PNWCC Online Masters"]
[Site "Chess.com INT"]
[Date "2020.05.25"]
[Round "9.23"]
[White "Lu, Jason"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "B48"]
[WhiteElo "2024"]
[BlackElo "2258"]
[PlyCount "91"]
[EventDate "2020.05.23"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 196 Extra"]
[Source "ChessBase"]
[SourceDate "2020.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Qf3 Nf6 8. 0-0-0 Ne5 9. Qg3 b5 10. f4 Neg4 11. Bg1 b4 12. Na4 Nh6 13. Qe3 Bb7 14. Bd3 e5 15. Nf3 exf4 16. Qd4 d6 17. Re1 Be7 18. Nb6 Rd8 19. Nd5 Bxd5 20. exd5 0-0 21. Qxb4 Rfe8 22. Qxf4 Nxd5 23. Bxh7+ Kh8 24. Qd2 Nb6 25. Bd3 Bf6 26. Bd4 Bxd4 27. Nxd4 d5 28. h3 Nc4 29. Qg5 Qa5 30. Ne6 fxe6 31. Bxc4 Nf5 32. Bd3 Kg8 33. Qg6 Qb4 34. Rxe6 Rf8 35. Rf1 Rb8 36. b3 Qd4 37. Rxf5 Qg1+ 38. Kb2 Rxf5 39. Qxf5 Rc8 40. Qh7+ Kf7 41. Qg6+ Kf8 42. Rf6+ gxf6 43. Qxf6+ Ke8 44. Qe6+ Kd8 45. Qd6+ Ke8 46. Bg6# 1-0

[Event "PNWCC Online Masters"]
[Site "Chess.com INT"]
[Date "2020.05.24"]
[Round "4.24"]
[White "Costello, Alexander"]
[Black "Nguyen, Thanh Thuy Tien"]
[Result "0-1"]
[ECO "D75"]
[WhiteElo "2258"]
[BlackElo "1971"]
[PlyCount "88"]
[EventDate "2020.05.23"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 196 Extra"]
[Source "ChessBase"]
[SourceDate "2020.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.07.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Bg7 6. Bg2 0-0 7. d4 c5 8. 0-0 cxd4 9. Nxd4 Nxc3 10. bxc3 Qc7 11. Qb3 a6 12. Rb1 e5 13. Nc2 Nc6 14. Ne3 Na5 15. Qb4 Be6 16. Bd5 Bh3 17. Rd1 Rfd8 18. g4 Rd7 19. Qe4 Qd8 20. Bxf7+ Kxf7 21. Qf3+ Kg8 22. Rxd7 Qxd7 23. Qxh3 Rc8 24. Qf3 b5 25. Ba3 Nc4 26. Rd1 Qe6 27. Nxc4 Qxc4 28. Bb4 e4 29. Qe3 a5 30. Be7 Qe6 31. Bh4 Qxg4+ 32. Bg3 Bxc3 33. Rd5 b4 34. Rxa5 b3 35. Ra7 b2 36. Rb7 Qe6 37. Kg2 Qd5 38. Qa7 e3+ 39. f3 Bd4 40. Qa6 Qc4 41. Qxc4+ Rxc4 42. Bd6 Rc1 43. Ba3 b1Q 44. Rxb1 Rxb1 0-1

[Event "PNWCC Online Masters"]
[Site "Chess.com INT"]
[Date "2020.05.24"]
[Round "6.24"]
[White "Costello, Alexander"]
[Black "Singh, Hersh"]
[Result "1-0"]
[ECO "C95"]
[WhiteElo "2258"]
[BlackElo "1906"]
[PlyCount "105"]
[EventDate "2020.05.23"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 196 Extra"]
[Source "ChessBase"]
[SourceDate "2020.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.07.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. Nf1 Bf8 14. Ng3 g6 15. a4 Nb6 16. dxe5 dxe5 17. Qxd8 Raxd8 18. axb5 axb5 19. Bg5 Bg7 20. Ra7 Rb8 21. Bd3 c6 22. Be3 Nc8 23. Ra5 Bf8 24. Nf1 Nd7 25. N1d2 Bc5 26. Bxc5 Nxc5 27. Bc2 Nb6 28. b4 Ncd7 29. Bb3 Kg7 30. c4 bxc4 31. Nxc4 Nxc4 32. Bxc4 Ra8 33. Rd1 Rxa5 34. bxa5 Nc5 35. Ng5 Re7 36. Nxf7 Rxf7 37. Bxf7 Kxf7 38. Rb1 Ke7 39. Rxb7+ Kd6 40. Rxh7 Na6 41. Rg7 Kc5 42. Rxg6 Kb5 43. Re6 c5 44. Rxe5 Kb4 45. Re6 Kxa5 46. Rxa6+ Kxa6 47. Kf1 Kb5 48. Ke2 Kb4 49. Kd2 Kb3 50. Kc1 c4 51. e5 c3 52. e6 c2 53. e7 1-0

[Event "PNWCC Online Masters"]
[Site "Chess.com INT"]
[Date "2020.05.24"]
[Round "5.30"]
[White "Yang, Alexander Z"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "D87"]
[WhiteElo "1630"]
[BlackElo "2258"]
[PlyCount "138"]
[EventDate "2020.05.23"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 196 Extra"]
[Source "ChessBase"]
[SourceDate "2020.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 0-0 9. 0-0 Nc6 10. Be3 Bg4 11. f3 Bd7 12. Rc1 Qc7 13. Qd2 b6 14. Bh6 Rad8 15. Bxg7 Kxg7 16. Qe3 Na5 17. Bd3 e6 18. Qf4 Qxf4 19. Nxf4 Ba4 20. d5 exd5 21. Nxd5 Bd7 22. c4 f5 23. Rfe1 fxe4 24. fxe4 Nc6 25. Bc2 Ne5 26. Bb1 Rf7 27. Rf1 Rxf1+ 28. Kxf1 Be6 29. Ke2 Bxd5 30. exd5 Re8 31. Kf2 Nf7 32. a4 Nd6 33. Bd3 Kf6 34. Kf3 Ke5 35. Ke3 a6 36. g4 b5 37. axb5 axb5 38. cxb5 Kxd5+ 39. Kd2 c4 40. Be2 Rb8 41. Rb1 Rxb5 42. Rd1 Ke5 43. Kc3 Rb3+ 44. Kc2 Rh3 45. Rh1 Kd4 46. Rd1+ Kc5 47. Rh1 Ne4 48. Bf1 Rf3 49. Kc1 Rf2 50. h3 Ng3 51. Rg1 Rxf1+ 52. Rxf1 Nxf1 53. Kd1 c3 54. Kc2 Kc4 55. g5 Ne3+ 56. Kc1 c2 57. h4 Kb3 58. h5 gxh5 59. g6 hxg6 60. Kd2 Kb2 61. Ke2 c1Q 62. Kf3 Qf1+ 63. Kxe3 h4 64. Ke4 h3 65. Ke3 h2 66. Ke4 h1Q+ 67. Ke3 Qhf3+ 68. Kd2 Q1d3+ 69. Ke1 Qfe2# 0-1

[Event "PNWCC Online Masters"]
[Site "Chess.com INT"]
[Date "2020.05.23"]
[Round "2.12"]
[White "Costello, Alexander"]
[Black "Bosiocic, Marin"]
[Result "1/2-1/2"]
[ECO "C41"]
[WhiteElo "2258"]
[BlackElo "2625"]
[PlyCount "61"]
[EventDate "2020.05.23"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 196 Extra"]
[Source "ChessBase"]
[SourceDate "2020.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.07.31"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. Nf3 Nbd7 5. Bc4 Be7 6. 0-0 0-0 7. Re1 c6 8. a4 a5 9. h3 Nb6 10. Bf1 exd4 11. Nxd4 d5 12. e5 Ne8 13. Bd3 g6 14. Bh6 Ng7 15. Qd2 f6 16. Bf4 Nd7 17. exf6 Bxf6 18. Nf3 Nc5 19. Be5 Nce6 20. b3 Bxe5 21. Nxe5 Nf4 22. Ne2 Ngh5 23. Nxf4 Nxf4 24. Qe3 Bxh3 25. gxh3 Qg5+ 26. Qg3 Nxh3+ 27. Kh1 Qh6 28. Ng4 Qh5 29. Kg2 Nf4+ 30. Kg1 Nh3+ 31. Kg2 1/2-1/2

[Event "PNWCC Online Masters"]
[Site "Chess.com INT"]
[Date "2020.05.23"]
[Round "1.36"]
[White "Feng, Andrew"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "B57"]
[WhiteElo "1484"]
[BlackElo "2258"]
[PlyCount "110"]
[EventDate "2020.05.23"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 196 Extra"]
[Source "ChessBase"]
[SourceDate "2020.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Nb3 Nf6 7. Bd3 a6 8. 0-0 Be7 9. Qe2 0-0 10. f4 d6 11. Bd2 b5 12. Rae1 b4 13. Nd1 Nd7 14. f5 Nde5 15. Ne3 a5 16. Ng4 Nxg4 17. Qxg4 Bf6 18. Bg5 exf5 19. exf5 Ne5 20. Qg3 Nd7 21. Nd2 Bb7 22. Nc4 Bxg5 23. Qxg5 f6 24. Qg3 Ne5 25. Rf4 Bd5 26. Nxe5 dxe5 27. Rh4 Ra7 28. Qh3 h6 29. Rg4 Kh7 30. Re3 e4 31. Bxe4 Bxe4 32. Rgxe4 Qxc2 33. Qg3 Qc1+ 34. Re1 Qc5+ 35. Qe3 Rc7 36. Qxc5 Rxc5 37. g4 Rd8 38. R1e2 h5 39. h3 Rd3 40. Kg2 Kh6 41. Re8 hxg4 42. hxg4 Rc4 43. R8e4 Rxe4 44. Rxe4 Rd2+ 45. Kf3 Rxb2 46. Re8 Kh7 47. g5 fxg5 48. Kg4 Rxa2 49. Kxg5 Rg2+ 50. Kh5 b3 51. Rb8 b2 52. Kh4 a4 53. Kh3 Rc2 54. Kg3 a3 55. Kf3 a2 0-1

[Event "PNWCC Online Masters"]
[Site "Chess.com INT"]
[Date "2020.05.23"]
[Round "3.11"]
[White "Tang, Andrew"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "E60"]
[WhiteElo "2538"]
[BlackElo "2258"]
[PlyCount "83"]
[EventDate "2020.05.23"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 196 Extra"]
[Source "ChessBase"]
[SourceDate "2020.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. f3 e6 4. e4 d5 5. cxd5 exd5 6. Nc3 c6 7. Bg5 Be7 8. Bh6 Be6 9. e5 Nfd7 10. f4 c5 11. Nf3 Nc6 12. Be2 Qb6 13. a3 0-0-0 14. 0-0 Kb8 15. Rc1 c4 16. b4 cxb3 17. Na4 Qa5 18. Qxb3 Nb6 19. Bb5 Nxa4 20. Bxa4 Qb6 21. Qd1 Na5 22. Rb1 Qc7 23. Bg5 Nc4 24. Bxe7 Qxe7 25. Bc6 b6 26. Rb4 Qc7 27. Qa4 Bd7 28. Bb5 Bxb5 29. Rxb5 Ne3 30. Rfb1 Rc8 31. Qa6 Nc4 32. Rxd5 Qc6 33. Rc5 Qe4 34. Re1 Qd3 35. Rd5 Nb2 36. Rb5 Rc2 37. a4 Rhc8 38. a5 Rc1 39. Kf2 Rxe1 40. axb6 Ra1 41. bxa7+ Kc7 42. Qd6# 1-0

[Event "North American op 29th"]
[Site "Las Vegas"]
[Date "2019.12.29"]
[Round "7"]
[White "Costello, Alexander"]
[Black "Paragua, Mark"]
[Result "0-1"]
[ECO "B51"]
[WhiteElo "2291"]
[BlackElo "2513"]
[PlyCount "68"]
[EventDate "2019.12.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Nc6 4. 0-0 Bd7 5. c3 Nf6 6. Re1 a6 7. Bf1 e6 8. d4 cxd4 9. cxd4 d5 10. e5 Ne4 11. Nbd2 Nxd2 12. Bxd2 Be7 13. a4 0-0 14. Qb3 Rb8 15. Rec1 f6 16. exf6 Rxf6 17. Qe3 h6 18. Bd3 Be8 19. Ne5 Bd6 20. Ng4 Rf4 21. Qxe6+ Bf7 22. Qe2 Rxd4 23. Bc3 Rxd3 24. Qxd3 d4 25. Rd1 Qg5 26. h3 dxc3 27. Qxd6 Rd8 28. Qxd8+ Nxd8 29. bxc3 Ne6 30. Rab1 Nf4 31. Kh2 Bd5 32. g3 Nxh3 33. Rb4 Nf4 34. f3 Bxf3 0-1

[Event "North American op 29th"]
[Site "Las Vegas"]
[Date "2019.12.27"]
[Round "4"]
[White "Gabuzyan, Hovhannes"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "A05"]
[WhiteElo "2610"]
[BlackElo "2291"]
[PlyCount "51"]
[EventDate "2019.12.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. 0-0 g6 5. d3 d5 6. c4 Bg7 7. cxd5 Nxd5 8. e4 Nf6 9. Nc3 0-0 10. Re1 c5 11. d4 cxd4 12. Nxd4 e5 13. Ndb5 Nbd7 14. b3 a6 15. Nd6 Qc7 16. Nxb7 Qxb7 17. Be3 Rac8 18. Rc1 Nc5 19. Nd5 Nxd5 20. exd5 Qe7 21. b4 Nb7 22. Rc6 b5 23. d6 Qd7 24. Rxa6 Ra8 25. Bc6 Qc8 26. d7 1-0

[Event "USA-ch U16"]
[Site "San Jose"]
[Date "2019.06.23"]
[Round "7"]
[White "Costello, Alexander"]
[Black "Stearman, Josiah P"]
[Result "0-1"]
[ECO "B33"]
[WhiteElo "2297"]
[BlackElo "2297"]
[PlyCount "66"]
[EventDate "2019.06.19"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[EventCategory "4"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[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. Bxf6 Bxf6 11. c3 Bg5 12. Nc2 Ne7 13. Ncb4 0-0 14. a4 bxa4 15. Qxa4 a5 16. Nxe7+ Qxe7 17. Nd5 Qb7 18. Bb5 Be6 19. Rd1 Rab8 20. c4 f5 21. exf5 Rxf5 22. 0-0 Rbf8 23. Qxa5 e4 24. Nc3 Bh4 25. g3 e3 26. f4 Rxf4 27. Rxf4 Rxf4 28. Nd5 e2 29. Ra1 Rf8 30. gxh4 Bh3 31. Ne3 Rf1+ 32. Rxf1 exf1Q+ 33. Nxf1 Qg2# 0-1

[Event "USA-ch U16"]
[Site "San Jose"]
[Date "2019.06.22"]
[Round "6"]
[White "Costello, Alexander"]
[Black "Shlyakhtenko, Robert"]
[Result "0-1"]
[ECO "B15"]
[WhiteElo "2297"]
[BlackElo "2206"]
[PlyCount "100"]
[EventDate "2019.06.19"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[EventCategory "4"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. Nf3 d5 5. h3 Nh6 6. Bf4 0-0 7. Qd2 dxe4 8. Nxe4 Nf5 9. c3 Nd7 10. Bc4 Nb6 11. Bd3 Nd5 12. Bh2 Bh6 13. Qc2 Nf4 14. 0-0 Nd6 15. Bxf4 Bxf4 16. Rfe1 Be6 17. Qe2 Nxe4 18. Qxe4 Qc7 19. Ne5 Bh6 20. Bc4 Bxc4 21. Nxc4 e6 22. a4 Rfd8 23. a5 c5 24. dxc5 Qxc5 25. a6 b6 26. Ne5 Rac8 27. Rad1 Bg7 28. Nxf7 Kxf7 29. Qxe6+ Kf8 30. Rd7 Rxd7 31. Qxd7 Qc7 32. Qe6 Rd8 33. g3 Qf7 34. Qc6 Kg8 35. Re4 Bf8 36. b4 Rd1+ 37. Kg2 Rd2 38. Rf4 Qd5+ 39. Qxd5+ Rxd5 40. Rc4 Rd7 41. Kf3 Kf7 42. Ke4 Ke6 43. f4 Bd6 44. Rc8 b5 45. Ra8 Rc7 46. Kd4 Be7 47. Rb8 Bf6+ 48. Ke4 Rc4+ 49. Kd3 Rxc3+ 50. Ke4 Rc4+ 0-1

[Event "USA-ch U16"]
[Site "San Jose"]
[Date "2019.06.21"]
[Round "4"]
[White "Costello, Alexander"]
[Black "Niemann, Hans Moke"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "2297"]
[BlackElo "2460"]
[PlyCount "90"]
[EventDate "2019.06.19"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[EventCategory "4"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. Qd2 Nbd7 9. f4 Rc8 10. 0-0-0 b5 11. Kb1 Be7 12. h3 h5 13. Bd3 h4 14. Rhe1 Bc4 15. fxe5 dxe5 16. Nd5 Nxd5 17. exd5 0-0 18. d6 Bf6 19. Bf5 Qe8 20. Bxd7 Qxd7 21. Nc5 Qc6 22. b3 Be6 23. d7 Ra8 24. Qd6 Qxd6 25. Rxd6 Bf5 26. Red1 Be7 27. R6d5 f6 28. R5d2 Rfb8 29. a4 bxa4 30. Ka2 axb3+ 31. cxb3 Kf7 32. Na4 Be6 33. Nb6 Bd8 34. Rd6 Ra7 35. R1d3 Rab7 36. Kb2 f5 37. b4 e4 38. Rd1 f4 39. Bc5 e3 40. Ka3 g5 41. R1d4 Rxb6 42. Bxb6 Rxb6 43. Rxb6 Bxb6 44. d8Q Bxd8 45. Rxd8 e2 0-1

[Event "USA-ch U16"]
[Site "San Jose"]
[Date "2019.06.21"]
[Round "5"]
[White "Wu, Rochelle"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "E60"]
[WhiteElo "2184"]
[BlackElo "2297"]
[PlyCount "173"]
[EventDate "2019.06.19"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[EventCategory "4"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. f3 e6 4. e4 d5 5. cxd5 exd5 6. Nc3 dxe4 7. fxe4 Bb4 8. Bd3 c5 9. d5 Nxe4 10. Qe2 0-0 11. Bxe4 Bxc3+ 12. bxc3 Re8 13. Nf3 Bf5 14. 0-0 Bxe4 15. Ng5 Bxd5 16. Qf2 Qe7 17. c4 Be6 18. Bf4 Nc6 19. Rae1 Nd4 20. Ne4 Bxc4 21. Be5 Qxe5 22. Nf6+ Kh8 23. Rxe5 Rxe5 24. Qh4 h5 25. Nd7 Re3 26. Nxc5 Ne2+ 27. Kf2 Rc3 28. Rd1 Kh7 29. Na4 Rc2 30. Qe4 Nd4+ 31. Kg1 Rd8 32. Rxd4 Rc1+ 33. Kf2 Rc8 34. Rd2 Rf1+ 35. Kg3 Be6 36. Rf2 Rc4 37. Qxb7 Rg4+ 38. Kf3 Rxf2+ 39. Kxf2 Rxa4 40. Ke3 Rxa2 41. Kf4 Kg7 42. Qe4 a5 43. Ke5 Rd2 44. Qc6 Rd5+ 45. Ke4 Rf5 46. Kd4 Rf4+ 47. Ke5 Rc4 48. Qa6 a4 49. Kd6 Kf6 50. Qa7 h4 51. Qe3 g5 52. Qe5+ Kg6 53. Ke7 Rf4 54. g3 hxg3 55. hxg3 Rc4 56. Qf6+ Kh5 57. Qf3+ g4 58. Qf6 Rc5 59. Qd4 Ra5 60. Kf6 a3 61. Qg1 Rf5+ 62. Kg7 Rg5+ 63. Kh7 Bf5+ 64. Kh8 Kg6 65. Qd4 Be6 66. Qe4+ Kf6 67. Qf4+ Rf5 68. Qxg4 a2 69. Qh4+ Ke5 70. Qh1 Rg5 71. Qa1+ Ke4 72. Qe1+ Kf3 73. Qf1+ Kxg3 74. Qd3+ Kg4 75. Qe4+ Kh5 76. Qh7+ Kg4 77. Qe4+ Kg3 78. Qe3+ Kh4 79. Qf4+ Kh5 80. Qh2+ Kg6 81. Qh6+ Kf5 82. Qh3+ Kf6 83. Qh6+ Kf5 84. Qh3+ Rg4 85. Qf3+ Kg5 86. Qe3+ Kf5 87. Qd3+ 0-1

[Event "USA-ch U16"]
[Site "San Jose"]
[Date "2019.06.20"]
[Round "2"]
[White "Costello, Alexander"]
[Black "Hong, Andrew Z"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "2297"]
[BlackElo "2414"]
[PlyCount "186"]
[EventDate "2019.06.19"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[EventCategory "4"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be7 8. f3 Be6 9. Qd2 Nbd7 10. 0-0-0 b5 11. Nd5 Bxd5 12. exd5 Nb6 13. Bxb6 Qxb6 14. Na5 0-0 15. Nc6 Rfe8 16. g3 Rac8 17. Bh3 Rc7 18. Rhe1 Bf8 19. f4 Nxd5 20. Nxe5 dxe5 21. Qxd5 Qh6 22. Bf5 g6 23. Bd3 Rce7 24. Kb1 exf4 25. Rxe7 Rxe7 26. a4 bxa4 27. Bxa6 Qxh2 28. gxf4 Qxf4 29. Bc4 Qe5 30. Qa8 a3 31. Qxa3 Kg7 32. Qf3 Ra7 33. c3 h5 34. Rf1 f5 35. Rg1 Bc5 36. Rd1 Qe4+ 37. Qxe4 fxe4 38. Bd5 Re7 39. Re1 e3 40. b4 Bd6 41. Kc2 Bg3 42. Re2 g5 43. Kd3 Bf2 44. b5 g4 45. b6 Rd7 46. c4 g3 47. b7 g2 48. b8Q g1Q 49. Qg8+ Kh6 50. Qxg1 Bxg1 51. Ke4 h4 52. Kf4 h3 53. Kg3 h2 54. Kg2 Kg5 55. Kh1 Kf4 56. Rc2 Re7 57. Re2 Ke5 58. Bf3 Rf7 59. Bg4 Rf4 60. Bh5 Rxc4 61. Ra2 Kf4 62. Rg2 Rc1 63. Ra2 Re1 64. Re2 Ra1 65. Rc2 Ra4 66. Kg2 Ra5 67. Be2 Rg5+ 68. Kh1 Kg3 69. Rc8 Rg7 70. Rf8 Rc7 71. Rf3+ Kh4 72. Rf4+ Kg5 73. Rg4+ Kf5 74. Ra4 Ke5 75. Ra5+ Kf4 76. Ra8 Kg3 77. Rf8 Rc2 78. Rf3+ Kh4 79. Rf4+ Kg5 80. Rg4+ Kf5 81. Rg2 Rc1 82. Bf3 Kf4 83. Bh5 Re1 84. Re2 Ra1 85. Rc2 e2 86. Rxe2 Kg3 87. Rg2+ Kh4 88. Rg8 Kxh5 89. Rh8+ Kg4 90. Rg8+ Kf3 91. Rf8+ Ke2 92. Kg2 h1Q+ 93. Kxh1 Bc5+ 0-1

[Event "USA-ch U16"]
[Site "San Jose"]
[Date "2019.06.20"]
[Round "3"]
[White "Wang, Justin"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "C95"]
[WhiteElo "2444"]
[BlackElo "2297"]
[PlyCount "115"]
[EventDate "2019.06.19"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[EventCategory "4"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. b3 Bf8 14. Bb2 g6 15. a4 c6 16. Bd3 Nh5 17. Qc2 Nf4 18. Bf1 Ne6 19. Rad1 Qb6 20. b4 Rad8 21. Nb3 Bg7 22. Na5 Ba8 23. axb5 axb5 24. g3 Nc7 25. Bg2 d5 26. dxe5 Nxe5 27. Nxe5 Bxe5 28. c4 Na6 29. Bxe5 Rxe5 30. c5 Nxb4 31. cxb6 Nxc2 32. Re2 Nb4 33. Rb2 c5 34. b7 d4 35. bxa8Q Rxa8 36. Nb7 Ra2 37. Rxa2 Nxa2 38. f4 Nc3 39. fxe5 Nxd1 40. Nxc5 b4 41. Nb3 d3 42. Bf1 Nb2 43. Kf2 h5 44. Ke3 Nc4+ 45. Kd4 d2 46. Be2 Na3 47. Nxd2 Nc2+ 48. Kc4 h4 49. g4 Kf8 50. Nf3 Ke7 51. Kb3 Ne3 52. Kxb4 Ng2 53. Kc3 Ke6 54. Bc4+ Ke7 55. Kd4 Nf4 56. Bf1 Ne6+ 57. Ke3 g5 58. Bc4 1-0

[Event "USA-ch U16"]
[Site "San Jose"]
[Date "2019.06.19"]
[Round "1"]
[White "Ke, Ivan"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "A50"]
[WhiteElo "2332"]
[BlackElo "2297"]
[PlyCount "77"]
[EventDate "2019.06.19"]
[EventType "tourn"]
[EventRounds "7"]
[EventCountry "USA"]
[EventCategory "4"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 b6 5. Bg2 Bb7 6. 0-0 0-0 7. Nc3 Ne4 8. Nd5 e6 9. Nf4 d5 10. cxd5 exd5 11. Qb3 c5 12. Rd1 c4 13. Qc2 Nc6 14. Be3 Nb4 15. Qb1 Re8 16. Ne5 f6 17. Bxe4 fxe5 18. dxe5 Rxe5 19. Bg2 Rxe3 20. fxe3 Qe8 21. a3 g5 22. axb4 Qxe3+ 23. Kh1 gxf4 24. Qf5 Qe7 25. gxf4 Kh8 26. Ra3 Qxe2 27. Rg1 Rf8 28. Qd7 Bc8 29. Qxg7+ Kxg7 30. Bf3+ Kf6 31. Bxe2 Bf5 32. Bf3 d4 33. Rxa7 Re8 34. Bd5 Bg6 35. Rb7 Re2 36. Rxb6+ Ke7 37. f5 Bh5 38. Rg7+ Kf8 39. f6 1-0

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2019.06.14"]
[Round "4"]
[White "Shetty, Atulya"]
[Black "Costello, Alexander"]
[Result "1/2-1/2"]
[ECO "A20"]
[WhiteElo "2431"]
[BlackElo "2297"]
[PlyCount "72"]
[EventDate "2019.06.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 190 Extra"]
[Source "ChessBase"]
[SourceDate "2019.07.15"]
[SourceVersion "1"]
[SourceVersionDate "2019.07.15"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nf6 3. Bg2 c6 4. d4 exd4 5. Qxd4 Na6 6. Nf3 Bc5 7. Qd1 0-0 8. 0-0 d5 9. cxd5 Qxd5 10. Qa4 Qh5 11. Bg5 Be7 12. Nc3 Nc5 13. Qc2 h6 14. Be3 Bf5 15. Qc1 Nce4 16. Nxe4 Bxe4 17. Bd4 c5 18. Bc3 Nd5 19. Bd2 b5 20. Rd1 a6 21. a4 Rfc8 22. h3 Qf5 23. Ne1 Bxg2 24. Kxg2 Qe4+ 25. Nf3 c4 26. Qb1 Qxb1 27. Raxb1 c3 28. bxc3 bxa4 29. Ra1 a3 30. Rdc1 Nb6 31. Rc2 Nc4 32. Bf4 g5 33. Bc1 Rab8 34. Nd4 Bc5 35. Rca2 Nb2 36. Nc2 Na4 1/2-1/2

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2019.06.13"]
[Round "2"]
[White "Li, Ruifeng"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2546"]
[BlackElo "2297"]
[PlyCount "133"]
[EventDate "2019.06.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 190 Extra"]
[Source "ChessBase"]
[SourceDate "2019.07.15"]
[SourceVersion "1"]
[SourceVersionDate "2019.07.15"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 a6 6. h3 d6 7. Bb3 Ba7 8. Nbd2 Ne7 9. Nf1 Ng6 10. Ng3 0-0 11. 0-0 Re8 12. Ng5 Re7 13. Nf5 Bxf5 14. exf5 Nf8 15. Ne4 N8d7 16. Bg5 d5 17. Ng3 c6 18. Qd2 h6 19. Be3 Qc7 20. Ne2 Bc5 21. Rae1 a5 22. Bc2 Rae8 23. Bxc5 Nxc5 24. g4 Qd6 25. f3 d4 26. c4 b5 27. b3 bxc4 28. bxc4 Rb7 29. Rb1 Rxb1 30. Rxb1 Qc7 31. Kg2 Nfd7 32. h4 Rb8 33. Qc1 Rxb1 34. Qxb1 Qb6 35. Qc1 a4 36. Kf1 Qa5 37. Qe1 Qb6 38. Qc1 Qa5 39. a3 Nb3 40. Qe1 Nd2+ 41. Kf2 Nc5 42. g5 hxg5 43. hxg5 Kf8 44. Qh1 Kg8 45. g6 fxg6 46. fxg6 Ne6 47. Qh3 Nf8 48. Qf5 Qd8 49. Qf7+ Kh8 50. Ng3 Qf6 51. Bxa4 Nxg6 52. Qxf6 gxf6 53. Bc2 Nh4 54. a4 Ndxf3 55. a5 Ng5 56. a6 Ne6 57. a7 Nc7 58. Ba4 c5 59. Ne4 Ng6 60. Nxc5 Ne7 61. Bd7 f5 62. Ne6 Na8 63. c5 Kg8 64. c6 Kf7 65. c7 Nb6 66. c8Q Nexc8 67. Bxc8 1-0

[Event "USA U16 K9 op"]
[Site "Grapevine"]
[Date "2019.04.28"]
[Round "6"]
[White "Costello, Alexander"]
[Black "Wu, Eric Sheng"]
[Result "1-0"]
[ECO "B43"]
[WhiteElo "2297"]
[BlackElo "1841"]
[PlyCount "111"]
[EventDate "2019.04.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "CBM 190 Extra"]
[Source "ChessBase"]
[SourceDate "2019.07.15"]
[SourceVersion "1"]
[SourceVersionDate "2019.07.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Qf3 Nf6 7. Bg5 Be7 8. a4 b6 9. Qg3 Qxg3 10. hxg3 d6 11. f3 Bb7 12. g4 Nbd7 13. Be3 Ne5 14. g5 Nfd7 15. Be2 0-0 16. f4 Nc6 17. g3 Nc5 18. Bf3 Rab8 19. Kf2 f6 20. gxf6 Bxf6 21. Rad1 Nb4 22. Rd2 Rf7 23. Rhd1 Rbf8 24. Nxe6 Nxe6 25. Rxd6 Bc8 26. R1d2 Bd8 27. Bg4 Nxf4 28. Bxc8 Bc7 29. gxf4 Rxc8 30. Re6 Bxf4 31. Bxf4 Rxf4+ 32. Ke3 Rcf8 33. Rxb6 Rf3+ 34. Kd4 Rd8+ 35. Nd5 Nxd5 36. exd5 Rf4+ 37. Kc5 Rxa4 38. c4 h5 39. b3 Ra1 40. Kc6 Rf1 41. d6 Rf7 42. Rb7 Rf6 43. Kc7 Rff8 44. d7 Kh7 45. c5 Kh6 46. c6 h4 47. Kd6 Rf6+ 48. Kc7 Rff8 49. Rb4 g5 50. Re4 Kh5 51. Rde2 h3 52. Re8 h2 53. Rxh2+ Kg4 54. Rxf8 Rxf8 55. d8Q Rxd8 56. Kxd8 1-0

[Event "USA U16 K9 op"]
[Site "Grapevine"]
[Date "2019.04.28"]
[Round "7"]
[White "Vivekananthan, Anish"]
[Black "Costello, Alexander"]
[Result "1/2-1/2"]
[ECO "C95"]
[WhiteElo "2193"]
[BlackElo "2297"]
[PlyCount "77"]
[EventDate "2019.04.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "CBM 190 Extra"]
[Source "ChessBase"]
[SourceDate "2019.07.15"]
[SourceVersion "1"]
[SourceVersionDate "2019.07.15"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. a4 Bf8 14. Bd3 b4 15. a5 d5 16. exd5 exd4 17. Rxe8 Qxe8 18. c4 Nc5 19. Nb3 c6 20. Nxc5 Bxc5 21. Bg5 Ne4 22. Qc2 Nxg5 23. Nxg5 h6 24. Ne4 Qe7 25. d6 Bxd6 26. c5 Bc7 27. Qc4 Qe5 28. Ng3 Bc8 29. Be4 Be6 30. Qxb4 Rb8 31. Qd2 Qxc5 32. Rc1 Bxa5 33. Qxh6 gxh6 34. Rxc5 Bd2 35. Rxc6 a5 36. Rc2 Bg5 37. Ne2 Rb4 38. f4 Bf6 39. Bd3 1/2-1/2

[Event "USA U16 K9 op"]
[Site "Grapevine"]
[Date "2019.04.26"]
[Round "1"]
[White "Pan, Zachary"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "1434"]
[BlackElo "2297"]
[PlyCount "89"]
[EventDate "2019.04.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "CBM 190 Extra"]
[Source "ChessBase"]
[SourceDate "2019.07.15"]
[SourceVersion "1"]
[SourceVersionDate "2019.07.15"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6 5. d3 h6 6. 0-0 0-0 7. Be3 Bxe3 8. fxe3 d6 9. Qe1 Na5 10. Bb3 Nxb3 11. axb3 c6 12. Qg3 Qe7 13. Nh4 Nh5 14. Qf2 g6 15. b4 Kh7 16. b5 f5 17. exf5 gxf5 18. Kh1 f4 19. Ne2 Be6 20. e4 Nf6 21. h3 c5 22. b3 Nh5 23. Nf3 Rg8 24. Qh4 Qe8 25. Ra5 Ng3+ 26. Nxg3 Rxg3 27. Kh2 Qg6 28. Qe7+ Kh8 29. Nh4 Rxg2+ 30. Nxg2 Rg8 31. Rf2 Bxh3 32. Qh4 Bxg2 33. Ra1 Bf3 34. Rd2 d5 35. exd5 Bxd5 36. Qh3 Qg5 37. c4 Bf3 38. Qxf3 e4 39. dxe4 Qe5 40. Rg1 Re8 41. Rf2 Rf8 42. Rg4 Qh5+ 43. Kg2 Qe5 44. Rxf4 Re8 45. Rf8+ 1-0

[Event "PRO League Stage"]
[Site "Chess.com INT"]
[Date "2019.03.06"]
[Round "9"]
[White "Clarke, Brandon GI"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "C95"]
[WhiteElo "2400"]
[BlackElo "2231"]
[PlyCount "85"]
[EventDate "2019.01.08"]
[EventType "team-swiss (rapid)"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]
[WhiteTeam "Australia Kangaroos"]
[BlackTeam "San Diego Surfers"]
[WhiteTeamCountry "AUS"]
[BlackTeamCountry "USA"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. Nf1 Bf8 14. Ng3 g6 15. a4 c5 16. d5 c4 17. Bg5 h6 18. Be3 Bg7 19. Qd2 Kh7 20. Nh2 Qe7 21. Rf1 Rf8 22. f4 exf4 23. Rxf4 Ne5 24. Nf3 Nxf3+ 25. Rxf3 Nd7 26. Rf4 h5 27. Raf1 Ne5 28. Ne2 Bc8 29. Nd4 Bd7 30. axb5 axb5 31. R4f2 Ra2 32. Qc1 Nd3 33. Bxd3 cxd3 34. Rf4 Be5 35. R4f3 Bxd4 36. Bxd4 f5 37. exf5 Bxf5 38. Re1 Qd7 39. Qg5 Ra7 40. Rfe3 Rf7 41. Re8 Rg7 42. Bxg7 d2 43. Qh6# 1-0

[Event "PRO League Stage"]
[Site "Chess.com INT"]
[Date "2019.03.06"]
[Round "9"]
[White "Costello, Alexander"]
[Black "Fernandez, Daniel Howard"]
[Result "0-1"]
[ECO "C42"]
[WhiteElo "2231"]
[BlackElo "2465"]
[PlyCount "100"]
[EventDate "2019.01.08"]
[EventType "team-swiss (rapid)"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]
[WhiteTeam "San Diego Surfers"]
[BlackTeam "Australia Kangaroos"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "AUS"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nxc3 6. dxc3 Be7 7. Be3 Nd7 8. Qd2 0-0 9. 0-0-0 Nf6 10. Nd4 c5 11. Nb5 d5 12. Bf4 Be6 13. Nc7 Rc8 14. Nxe6 fxe6 15. f3 Ne4 16. fxe4 Rxf4 17. Qd3 c4 18. Qe2 Rxe4 19. Qxe4 dxe4 20. Rxd8+ Bxd8 21. Kd1 Bg5 22. Ke1 b5 23. g3 Bc1 24. b3 Kf7 25. Bg2 cxb3 26. axb3 Rxc3 27. Kd1 Bg5 28. Bxe4 a5 29. Rf1+ Bf6 30. Kd2 Rc8 31. g4 h6 32. Bd3 Rc5 33. h4 Ke7 34. h5 a4 35. bxa4 bxa4 36. Rb1 Rc7 37. Rb6 Bc3+ 38. Ke2 Ba5 39. Ra6 Rc5 40. Bc4 Rxc4 41. Rxa5 Rxg4 42. Kd3 Kd6 43. Ra7 Kc5 44. Ra5+ Kb4 45. Ra8 Rg3+ 46. Ke4 Rg5 47. Rb8+ Kc3 48. Rc8+ Kb2 49. Ra8 Kxc2 50. Rxa4 Rg4+ 0-1

[Event "PRO League Stage"]
[Site "Chess.com INT"]
[Date "2019.03.06"]
[Round "9"]
[White "Costello, Alexander"]
[Black "Illingworth, Max"]
[Result "1/2-1/2"]
[ECO "B17"]
[WhiteElo "2231"]
[BlackElo "2501"]
[PlyCount "91"]
[EventDate "2019.01.08"]
[EventType "team-swiss (rapid)"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]
[WhiteTeam "San Diego Surfers"]
[BlackTeam "Australia Kangaroos"]
[WhiteTeamCountry "USA"]
[BlackTeamCountry "AUS"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Bd3 Ngf6 6. Ng5 e6 7. N1f3 Bd6 8. Qe2 h6 9. Ne4 Nxe4 10. Bxe4 0-0 11. 0-0 c5 12. Rd1 Qc7 13. h3 Nf6 14. Bd3 b6 15. b3 Nd5 16. Bd2 Bb7 17. c4 Nf4 18. Bxf4 Bxf4 19. Be4 cxd4 20. Bxb7 Qxb7 21. Rxd4 Bc7 22. Rad1 Rad8 23. Rxd8 Rxd8 24. Rxd8+ Bxd8 25. Qd3 Bf6 26. Nd2 Be7 27. Ne4 f5 28. Nc3 a6 29. g4 g6 30. Ne2 Kf7 31. gxf5 gxf5 32. Nf4 Bg5 33. Qd4 Bf6 34. Qe3 Qc6 35. Nd3 Qd6 36. b4 Qd4 37. Qe2 a5 38. bxa5 bxa5 39. c5 Qd5 40. Nf4 Qc6 41. Qh5+ Ke7 42. Ng6+ Kd7 43. Nf8+ Ke7 44. Ng6+ Kd8 45. Nf8 Ke7 46. Ng6+ 1/2-1/2

[Event "PRO League Stage"]
[Site "Chess.com INT"]
[Date "2019.03.06"]
[Round "9"]
[White "Sarana, Alexey"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "D93"]
[WhiteElo "2630"]
[BlackElo "2231"]
[PlyCount "87"]
[EventDate "2019.01.08"]
[EventType "team-swiss (rapid)"]
[EventRounds "10"]
[EventCountry "USA"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]
[WhiteTeam "Australia Kangaroos"]
[BlackTeam "San Diego Surfers"]
[WhiteTeamCountry "AUS"]
[BlackTeamCountry "USA"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 0-0 6. Rc1 c6 7. Nf3 Be6 8. Qb3 Qb6 9. c5 Qxb3 10. axb3 Nbd7 11. h3 h6 12. b4 b6 13. Ba6 bxc5 14. bxc5 Bf5 15. Bb7 Rad8 16. Bxc6 e6 17. 0-0 Ne4 18. Ra1 e5 19. Bxd7 exf4 20. Bxf5 gxf5 21. exf4 Rb8 22. Nxd5 Rxb2 23. Rxa7 Nd2 24. Ne7+ Kh7 25. Nxd2 Rxd2 26. Nxf5 Bxd4 27. Nxd4 Rxd4 28. g3 Rc4 29. Rc7 Kg6 30. Rd1 Rc2 31. Rd6+ Kf5 32. Kg2 f6 33. Rd5+ Ke4 34. Rd6 h5 35. Re7+ Kf5 36. Rd5+ Kg6 37. h4 f5 38. Rd6+ Rf6 39. Ree6 Rxe6 40. Rxe6+ Kf7 41. Rh6 Rxc5 42. Rxh5 Kg6 43. Rg5+ Kf6 44. g4 1-0

[Event "Bay Area op"]
[Site "Burlingame"]
[Date "2019.01.07"]
[Round "9"]
[White "Javakhadze, Zurab"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "A05"]
[WhiteElo "2449"]
[BlackElo "2231"]
[PlyCount "120"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. Nf3 Nf6 2. b3 g6 3. Bb2 Bg7 4. e4 d6 5. Qe2 e5 6. d4 exd4 7. Nxd4 0-0 8. Nc3 Re8 9. 0-0-0 Nbd7 10. h4 d5 11. h5 Nxe4 12. Nxe4 Rxe4 13. Qd2 c6 14. hxg6 hxg6 15. f3 Rh4 16. Rxh4 Qxh4 17. Kb1 Ne5 18. Qb4 a5 19. Qd6 Nd7 20. Ne2 Bxb2 21. Kxb2 Qf6+ 22. Qxf6 Nxf6 23. c4 Bd7 24. Nf4 g5 25. Nd3 Be6 26. Kc3 dxc4 27. bxc4 Nd7 28. Rb1 b6 29. f4 f6 30. g3 Bf5 31. Rd1 Re8 32. Kd2 Bxd3 33. Kxd3 Nc5+ 34. Kc2 gxf4 35. gxf4 Re4 36. f5 Rf4 37. Be2 Rxf5 38. Rd8+ Kf7 39. Rb8 Nd7 40. Rb7 Ke8 41. Kd2 Re5 42. Rc7 Re6 43. Bg4 Rd6+ 44. Kc3 Kd8 45. Ra7 Ne5 46. Bf5 Rd1 47. Be6 Rd3+ 48. Kc2 Rd6 49. Bg8 f5 50. c5 bxc5 51. Rxa5 Nd7 52. Ra3 f4 53. Rd3 Rf6 54. Kd1 Kc7 55. Ke1 Ne5 56. Rc3 f3 57. Bc4 Ng4 58. Bf1 Re6+ 59. Kd2 Nh2 60. Bc4 f2 0-1

[Event "Bay Area op"]
[Site "Burlingame"]
[Date "2019.01.06"]
[Round "8"]
[White "Costello, Alexander"]
[Black "Ampie, Mauro"]
[Result "1/2-1/2"]
[ECO "B48"]
[WhiteElo "2231"]
[BlackElo "2318"]
[PlyCount "41"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Qd2 Nf6 8. f4 Bb4 9. Bd3 Na5 10. a3 Bxc3 11. Qxc3 Qxc3+ 12. bxc3 d5 13. exd5 Nxd5 14. Bd2 Nb6 15. Rb1 Nbc4 16. Rb4 Nxd2 17. Kxd2 Kd8 18. Be4 Kc7 19. Rhb1 Rb8 20. Nb3 Nxb3+ 21. cxb3 1/2-1/2

[Event "Bay Area op"]
[Site "Burlingame"]
[Date "2019.01.05"]
[Round "6"]
[White "Costello, Alexander"]
[Black "Ezra, Paul Chambers"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "2231"]
[BlackElo "2360"]
[PlyCount "39"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. e4 Nc6 2. Nf3 d6 3. d4 Nf6 4. c3 g6 5. Bd3 Bg7 6. 0-0 0-0 7. Re1 e5 8. h3 Bd7 9. Na3 Re8 10. Nc2 a5 11. Bd2 a4 12. Qc1 Na5 13. Bg5 c6 14. c4 Qc7 15. c5 Nxe4 16. Rxe4 f5 17. cxd6 Qxd6 18. dxe5 Qxd3 19. Rd4 Qe2 20. Rxd7 1-0

[Event "Bay Area op"]
[Site "Burlingame"]
[Date "2019.01.05"]
[Round "7"]
[White "Jacobson, Brandon"]
[Black "Costello, Alexander"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2404"]
[BlackElo "2231"]
[PlyCount "71"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. b4 b6 2. Bb2 Bb7 3. Nf3 e6 4. e3 f5 5. c4 Nf6 6. b5 Be7 7. Nc3 d6 8. d4 Ne4 9. Be2 0-0 10. 0-0 Nd7 11. a4 a5 12. Nxe4 fxe4 13. Nd2 Bg5 14. Qc2 Nf6 15. c5 Bd5 16. Ra3 Qe8 17. Rc3 bxc5 18. dxc5 Nd7 19. cxd6 cxd6 20. Bc4 Nc5 21. Ba3 Be7 22. Bxc5 dxc5 23. Nxe4 Rc8 24. Rd1 Qf7 25. f3 Rfd8 26. Rcd3 Qf5 27. Qa2 Bxc4 28. Rxd8+ Rxd8 29. Rxd8+ Bxd8 30. Qxc4 Bb6 31. g4 Qxf3 32. Qxe6+ Kf8 33. Qxb6 Qxe4 34. Qd8+ Kf7 35. Qd7+ Kg8 36. Qc8+ 1-0

[Event "Bay Area op"]
[Site "Burlingame"]
[Date "2019.01.04"]
[Round "5"]
[White "Zhu, Jack Q"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "C26"]
[WhiteElo "2364"]
[BlackElo "2231"]
[PlyCount "78"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. g3 Bc5 5. Bg2 d6 6. 0-0 a6 7. d3 h6 8. a3 Be6 9. b4 Ba7 10. Be3 Bxe3 11. fxe3 Ne7 12. Qe2 c6 13. Nd1 Ng6 14. c4 d5 15. exd5 cxd5 16. c5 0-0 17. Qb2 Nd7 18. Rc1 Qc7 19. Nc3 Ne7 20. Nd2 b6 21. d4 e4 22. c6 Nf6 23. b5 Ng4 24. Rfe1 a5 25. a4 f5 26. Nf1 g5 27. Rc2 Kg7 28. Rec1 Nf6 29. Ne2 Ng6 30. Qc3 Kh7 31. Kf2 h5 32. Ke1 h4 33. Bh3 Kg7 34. Kd2 Rh8 35. Bg2 hxg3 36. hxg3 Ng4 37. Ke1 Raf8 38. Ng1 f4 39. Nh3 Nxe3 0-1

[Event "Bay Area op"]
[Site "Burlingame"]
[Date "2019.01.03"]
[Round "3"]
[White "Costello, Alexander"]
[Black "Hong, Andrew Z"]
[Result "0-1"]
[ECO "B25"]
[WhiteElo "2231"]
[BlackElo "2390"]
[PlyCount "64"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. e4 c5 2. Ne2 Nf6 3. Nbc3 d6 4. g3 g6 5. Bg2 Bg7 6. 0-0 Nc6 7. d3 0-0 8. h3 Rb8 9. f4 Nd7 10. g4 Nd4 11. f5 b5 12. Nd5 Bb7 13. Ne3 e6 14. c3 Nxe2+ 15. Qxe2 b4 16. Bd2 bxc3 17. bxc3 g5 18. h4 h6 19. hxg5 hxg5 20. fxe6 fxe6 21. d4 cxd4 22. cxd4 Qb6 23. Nc4 Bxd4+ 24. Kh1 Qc5 25. Rac1 Ba6 26. a3 Rbc8 27. Rxf8+ Nxf8 28. Bf1 d5 29. exd5 Qxd5+ 30. Bg2 Rxc4 31. Rf1 Qd7 32. Qf3 Qh7+ 0-1

[Event "Bay Area op"]
[Site "Burlingame"]
[Date "2019.01.03"]
[Round "4"]
[White "Virtanen, Teemu"]
[Black "Costello, Alexander"]
[Result "1/2-1/2"]
[ECO "A15"]
[WhiteElo "2326"]
[BlackElo "2231"]
[PlyCount "94"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 d5 3. cxd5 Nxd5 4. Bg2 g6 5. Qb3 e6 6. Nc3 Nb6 7. h4 Bg7 8. h5 Nc6 9. Nf3 e5 10. d3 Bg4 11. Bg5 f6 12. hxg6 hxg6 13. Rxh8+ Bxh8 14. Bh6 Ne7 15. 0-0-0 c6 16. d4 Bxf3 17. Bxf3 exd4 18. e3 f5 19. Ne2 Qd6 20. Nxd4 Bxd4 21. Rxd4 Qc5+ 22. Kb1 Rd8 23. Bg7 Rxd4 24. Bxd4 Qa5 25. Bc3 Qa6 26. Qd1 Nbd5 27. Bd4 Qc4 28. a3 Nb6 29. Qc2 Qb5 30. e4 Nc4 31. Ka2 Nb6 32. Be2 Qa5 33. Bd3 fxe4 34. Bxe4 Qg5 35. Qd3 Qg4 36. Ka1 Nbc8 37. Be5 Nb6 38. Qd4 Qe6 39. Bb8 Nd7 40. Bxa7 c5 41. Qa4 b5 42. Qc2 Qd6 43. Bf3 Qc7 44. Be2 Qxa7 45. Bxb5 Qb6 46. Qd3 Qe6 47. Qc3 Qd6 1/2-1/2

[Event "Bay Area op"]
[Site "Burlingame"]
[Date "2019.01.02"]
[Round "2"]
[White "Canessa, John L"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "C95"]
[WhiteElo "1958"]
[BlackElo "2231"]
[PlyCount "132"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. Nf1 Bf8 14. Ng3 g6 15. a4 c5 16. d5 c4 17. Bg5 h6 18. Be3 Nc5 19. Qd2 Kh7 20. Ra3 Qc7 21. Rea1 Nfd7 22. Qe2 Nb6 23. axb5 axb5 24. Nh2 Bg7 25. Ng4 Rxa3 26. Rxa3 Bc8 27. h4 h5 28. Nh2 Kg8 29. Qd2 Bd7 30. Bd1 Ra8 31. Rxa8+ Nxa8 32. Bh6 Qd8 33. Bg5 Bf6 34. f4 exf4 35. Qxf4 Bxg5 36. hxg5 Qb6 37. Qe3 Nd3 38. Qxb6 Nxb6 39. b3 cxb3 40. Bxb3 Nc1 41. Bc2 Na4 42. Kf2 Nxc3 43. Nf3 b4 44. Nd4 Ba4 45. Bxa4 Nxa4 46. Ke3 Nc5 47. Nge2 Nxe2 48. Nxe2 b3 49. Nc3 b2 50. Kd4 Kf8 51. Nb1 Ke7 52. Na3 Na4 53. Kc4 f6 54. gxf6+ Kxf6 55. Kd4 g5 56. Nb1 h4 57. Ke3 g4 58. Kf4 h3 59. gxh3 gxh3 60. e5+ dxe5+ 61. Kg3 e4 62. Kxh3 Ke5 63. d6 Kxd6 64. Kg2 Ke5 65. Kf2 Kd4 66. Ke1 Nc3 0-1

[Event "Bay Area op"]
[Site "Burlingame"]
[Date "2019.01.01"]
[Round "1"]
[White "Costello, Alexander"]
[Black "Wang, Kevin A"]
[Result "0-1"]
[ECO "B09"]
[WhiteElo "2231"]
[BlackElo "2450"]
[PlyCount "132"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 0-0 6. Bd3 Nc6 7. e5 dxe5 8. fxe5 Nh5 9. Be3 Bg4 10. Be4 f6 11. exf6 Nxf6 12. Bxc6 bxc6 13. Qe2 Bxf3 14. gxf3 Nd5 15. Rd1 Rb8 16. 0-0 Rxb2 17. Bc1 Nxc3 18. Qe6+ Kh8 19. Bxb2 Nxd1 20. Rxd1 Qd6 21. Qb3 Qd5 22. Qxd5 cxd5 23. Kf2 c5 24. Ke3 Rb8 25. Ba1 c4 26. Bc3 Kg8 27. Kf4 Kf7 28. Re1 e6 29. a4 Bf8 30. h3 Kf6 31. Ke3 Bd6 32. Kf2 Rb6 33. Kg2 Bb4 34. a5 Rb8 35. Rb1 Bd6 36. Re1 a6 37. Kf2 Rb5 38. Ke3 Bc7 39. Ra1 Kf5 40. Kf2 e5 41. Re1 exd4 42. Bxd4 Bd6 43. Re8 Rxa5 44. Rd8 Ke6 45. Re8+ Be7 46. Bb6 Rb5 47. Bd8 Rb7 48. Bxe7 Rxe7 49. Ra8 Ke5 50. Rxa6 Kd4 51. Ra3 Re6 52. h4 h5 53. Ra5 Kc3 54. Rxd5 Kxc2 55. Kg3 c3 56. Kf4 Rc6 57. Kg5 Kb3 58. Rb5+ Ka4 59. Rb1 c2 60. Rg1 Rd6 61. Rc1 Kb3 62. f4 Kb2 63. Rg1 c1Q 64. Rxc1 Kxc1 65. f5 gxf5 66. Kxh5 Rd4 0-1

[Event "American op 54th"]
[Site "Costa Mesa"]
[Date "2018.11.25"]
[Round "7"]
[White "Costello, Alexander"]
[Black "Chua, Alexander J"]
[Result "1-0"]
[ECO "B56"]
[WhiteElo "2231"]
[BlackElo "2291"]
[PlyCount "71"]
[EventDate "2018.11.22"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "USA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Nge2 d6 4. d4 cxd4 5. Nxd4 Nf6 6. f3 e5 7. Nb3 Be6 8. Be3 Be7 9. Qd2 0-0 10. 0-0-0 a5 11. a4 Nb4 12. Qf2 Qb8 13. Kb1 Rc8 14. Rd2 d5 15. exd5 Nfxd5 16. Nxd5 Bxd5 17. Bb5 Bc4 18. Rhd1 Bxb5 19. axb5 a4 20. Nc5 a3 21. c3 Na2 22. Kxa2 axb2+ 23. Kxb2 Qc7 24. Rd7 Qa5 25. Rxe7 Qa3+ 26. Kc2 b6 27. Kd2 Rxc5 28. Ke1 Rxc3 29. Rxe5 f6 30. Re4 Qb3 31. Qd2 Rc2 32. Qd7 Rf8 33. Qe6+ Qxe6 34. Rxe6 Kf7 35. Re4 Rxg2 36. Rd2 1-0

[Event "American op 54th"]
[Site "Costa Mesa"]
[Date "2018.11.23"]
[Round "3"]
[White "Mahajan, Rushaan"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "A48"]
[WhiteElo "1999"]
[BlackElo "2231"]
[PlyCount "52"]
[EventDate "2018.11.22"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "USA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 0-0 5. Be2 d6 6. h3 c5 7. c3 b6 8. Nbd2 Bb7 9. 0-0 Nbd7 10. Bh2 Qc7 11. a4 a6 12. Re1 Rfe8 13. Bd3 e5 14. dxe5 Nxe5 15. Nxe5 dxe5 16. e4 Rad8 17. Bc2 Bh6 18. Re2 Bxe4 19. Bxe4 Nxe4 20. Nxe4 Rxd1+ 21. Rxd1 Re6 22. Rd5 f5 23. Nd2 Qc6 24. Rd8+ Re8 25. Rxe8+ Qxe8 26. Bxe5 Bxd2 0-1

[Event "Las Vegas National op"]
[Site "Las Vegas"]
[Date "2018.06.21"]
[Round "1"]
[White "Costello, Alexander"]
[Black "Nyzhnyk, Illya"]
[Result "0-1"]
[ECO "B19"]
[WhiteElo "2150"]
[BlackElo "2598"]
[PlyCount "102"]
[EventDate "2018.06.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "CBM 185 Extra"]
[Source "ChessBase"]
[SourceDate "2018.07.29"]
[SourceVersion "1"]
[SourceVersionDate "2018.07.29"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bd2 Ngf6 12. 0-0-0 Be7 13. Kb1 0-0 14. Ne4 Nxe4 15. Qxe4 Nf6 16. Qe2 Qd5 17. Be3 Rfd8 18. Ne5 Bd6 19. Ng4 Nxg4 20. Qxg4 f5 21. Qe2 f4 22. Bc1 Rf8 23. Rhe1 Rae8 24. g4 fxg3 25. fxg3 Bxg3 26. Rg1 Qf3 27. Qxf3 Rxf3 28. Rg2 Bf4 29. Rdg1 Re7 30. Rg6 Kf8 31. Re1 Bxc1 32. Kxc1 Rf5 33. Re5 Rxe5 34. dxe5 Rf7 35. Rxe6 Rf5 36. a4 Rxh5 37. a5 a6 38. Kd2 Kf7 39. Rd6 Ke7 40. Rd3 Rxe5 41. Rg3 Kf6 42. b4 c5 43. c3 cxb4 44. cxb4 g5 45. Kc3 h5 46. Kb3 g4 47. Rd3 h4 48. Rd8 g3 49. Rf8+ Kg5 50. Rg8+ Kf4 51. Rg5 Rxg5 0-1

[Event "American op 53rd"]
[Site "Costa Mesa"]
[Date "2017.11.24"]
[Round "3"]
[White "Burrows, Brandon"]
[Black "Costello, Alexander"]
[Result "0-1"]
[ECO "C44"]
[WhiteElo "2092"]
[BlackElo "2163"]
[PlyCount "76"]
[EventDate "2017.11.23"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "USA"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d3 Nf6 4. g3 Bc5 5. Bg2 0-0 6. 0-0 d5 7. Qe2 Re8 8. h3 h6 9. Kh2 Be6 10. Nbd2 Qd7 11. Nb3 Bf8 12. Ne1 Rad8 13. Be3 b6 14. f3 a5 15. Nd2 a4 16. f4 dxe4 17. dxe4 Nd4 18. Qf2 Qb5 19. Bxd4 exd4 20. Nd3 Qh5 21. Ne5 Bxh3 22. Bxh3 Rxe5 23. Qf3 Qxf3 24. Rxf3 Rc5 25. e5 Rxc2 26. Rf2 Nd5 27. Ne4 Rxf2+ 28. Nxf2 Ne3 29. Nd3 c5 30. b3 axb3 31. axb3 b5 32. Rc1 c4 33. bxc4 bxc4 34. Nf2 d3 35. Rc3 Bb4 36. Rc1 d2 37. Rb1 c3 38. Rxb4 c2 0-1

[Event "American op 53rd"]
[Site "Costa Mesa"]
[Date "2017.11.23"]
[Round "1"]
[White "Costello, Alexander"]
[Black "Baryshpolets, Andrey"]
[Result "0-1"]
[ECO "C12"]
[WhiteElo "2163"]
[BlackElo "2592"]
[PlyCount "68"]
[EventDate "2017.11.23"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "USA"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 7. Bxc3 Ne4 8. Bb4 c5 9. Bxc5 Qa5+ 10. c3 Nxc5 11. dxc5 Qxc5 12. Nf3 Bd7 13. Qd2 0-0 14. Bd3 Bb5 15. Bc2 a5 16. g4 Nd7 17. 0-0-0 Bc4 18. Bb1 Rfc8 19. Rhe1 b5 20. g5 b4 21. Re3 h5 22. g6 f6 23. exf6 Nxf6 24. Qd4 Qb5 25. Rde1 Rab8 26. Qd2 Ne4 27. Bxe4 dxe4 28. Nd4 Qb6 29. Ne2 Rd8 30. Qc2 Bd3 31. Qb3 Qc6 32. c4 a4 33. Qd1 Qxc4+ 34. Qc2 Qxc2# 0-1

