Alexander Costello
Country
USA
Birth Year
2003
Gender
M
Title
International Master
FIDE ID
2099659
FIDE Rating
2263
FIDE Rating Graph
Games
| # | Date | Event | Site | Round | White | Black | Result | Moves | View |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2025-05-13 | Titled Tue 13th May Late | chess.com INT | 9 | Andres Ferriz Barrios | Alexander Costello | 0-1 | 27 | Open |
| 2 | 2025-05-13 | Titled Tue 13th May Late | chess.com INT | 8 | Inigo Argandona Riveiro | Alexander Costello | 0-1 | 40 | Open |
| 3 | 2025-05-13 | Titled Tue 13th May Late | chess.com INT | 7 | Alexander Costello | Arman Mikaelyan | 0-1 | 37 | Open |
| 4 | 2025-05-13 | Titled Tue 13th May Late | chess.com INT | 6 | Alexander Costello | Mladen Gajic | 1-0 | 30 | Open |
| 5 | 2025-05-13 | Titled Tue 13th May Late | chess.com INT | 5 | Timur Kocharin | Alexander Costello | 0-1 | 71 | Open |
| 6 | 2025-05-13 | Titled Tue 13th May Late | chess.com INT | 4 | Alexander Costello | Xavier Martinez Pla | 1-0 | 60 | Open |
| 7 | 2025-05-13 | Titled Tue 13th May Late | chess.com INT | 3 | Alain Fayard | Alexander Costello | 0-1 | 17 | Open |
| 8 | 2025-05-13 | Titled Tue 13th May Late | chess.com INT | 11 | Alexander Costello | Nebojsa M Ristic | 0-1 | 49 | Open |
| 9 | 2025-05-13 | Titled Tue 13th May Late | chess.com INT | 10 | Alexander Costello | Artem Bardyk | 0-1 | 32 | Open |
| 10 | 2025-04-22 | Titled Tue 22nd Apr Late | chess.com INT | 1 | Alexander Costello | Paul Powell | 1-0 | 30 | Open |
| 11 | 2025-04-15 | Titled Tue 15th Apr Late | chess.com INT | 9 | Alexander Costello | Thomas Carroll | 1-0 | 29 | Open |
| 12 | 2025-04-15 | Titled Tue 15th Apr Late | chess.com INT | 8 | Mahel Boyer | Alexander Costello | 1-0 | 36 | Open |
| 13 | 2025-04-15 | Titled Tue 15th Apr Late | chess.com INT | 7 | Alexander Costello | Artem Dobrosmyslov | 1-0 | 29 | Open |
| 14 | 2025-04-15 | Titled Tue 15th Apr Late | chess.com INT | 6 | Alexander Costello | Markus Ragger | 0-1 | 39 | Open |
| 15 | 2025-04-15 | Titled Tue 15th Apr Late | chess.com INT | 5 | Alexander Khlebovich | Alexander Costello | 1-0 | 7 | Open |
| 16 | 2025-04-15 | Titled Tue 15th Apr Late | chess.com INT | 4 | Alexander Costello | Rustam Rustamov | 1-0 | 64 | Open |
| 17 | 2025-04-15 | Titled Tue 15th Apr Late | chess.com INT | 3 | Alexander Costello | Marlon Jodar Arias | 1-0 | 31 | Open |
| 18 | 2025-04-15 | Titled Tue 15th Apr Late | chess.com INT | 2 | Marcel Beulen | Alexander Costello | 0-1 | 36 | Open |
| 19 | 2025-04-15 | Titled Tue 15th Apr Late | chess.com INT | 11 | Tikhon Popov | Alexander Costello | 1-0 | 72 | Open |
| 20 | 2025-04-15 | Titled Tue 15th Apr Late | chess.com INT | 10 | Ethan Sheehan | Alexander Costello | 0-1 | 63 | Open |
| 21 | 2025-03-25 | Titled Tue 25th Mar Late | chess.com INT | 9 | Adam Gibala | Alexander Costello | 1/2-1/2 | 72 | Open |
| 22 | 2025-03-25 | Titled Tue 25th Mar Late | chess.com INT | 8 | Hubert Zieba | Alexander Costello | 1/2-1/2 | 58 | Open |
| 23 | 2025-03-25 | Titled Tue 25th Mar Late | chess.com INT | 7 | Alexander Costello | Havard Haug | 0-1 | 29 | Open |
| 24 | 2025-03-25 | Titled Tue 25th Mar Late | chess.com INT | 6 | Marcelo Villalba | Alexander Costello | 0-1 | 22 | Open |
| 25 | 2025-03-25 | Titled Tue 25th Mar Late | chess.com INT | 5 | Alexander Costello | Zbigniew Pakleza | 0-1 | 31 | Open |
| 26 | 2025-03-25 | Titled Tue 25th Mar Late | chess.com INT | 4 | Piero Mazzilli | Alexander Costello | 0-1 | 48 | Open |
| 27 | 2025-03-25 | Titled Tue 25th Mar Late | chess.com INT | 3 | Alexander Costello | Julian Groetzbach | 1-0 | 31 | Open |
| 28 | 2025-03-25 | Titled Tue 25th Mar Late | chess.com INT | 2 | Jacek Stachanczyk | Alexander Costello | 0-1 | 62 | Open |
| 29 | 2025-03-25 | Titled Tue 25th Mar Late | chess.com INT | 10 | Alexander Costello | Antoine Bournel | 0-1 | 16 | Open |
| 30 | 2025-03-11 | Titled Tue 11th Mar Late | chess.com INT | 1 | Jose Eduardo Martinez Alcantara | Alexander Costello | 1-0 | 71 | Open |
| 31 | 2025-03-04 | Titled Tue 4th Mar Late | chess.com INT | 6 | Alexander Costello | Neeraj Harish | 0-1 | 56 | Open |
| 32 | 2025-03-04 | Titled Tue 4th Mar Late | chess.com INT | 5 | Alexander Costello | Bogusz Piliczewski | 1-0 | 46 | Open |
| 33 | 2025-02-25 | Titled Tue 25th Feb Late | chess.com INT | 1 | Albert Bokros | Alexander Costello | 0-1 | 25 | Open |
| 34 | 2024-06-18 | Titled Tue 18th Jun Early | chess.com INT | 1 | Ivan Zemlyanskii | Alexander Costello | 1-0 | 53 | Open |
| 35 | 2024-06-16 | ch-Southern California | Temecula USA | 7.1 | Alexander Costello | John Daniel Bryant | 1/2-1/2 | 21 | Open |
| 36 | 2024-06-16 | ch-Southern California | Temecula USA | 6.4 | Cemil Can Ali Marandi | Alexander Costello | 0-1 | 70 | Open |
| 37 | 2024-06-15 | ch-Southern California | Temecula USA | 5.2 | Alexander Costello | Gabriel Eidelman | 0-1 | 53 | Open |
| 38 | 2024-06-15 | ch-Southern California | Temecula USA | 4.3 | Robert Shlyakhtenko | Alexander Costello | 1-0 | 24 | Open |
| 39 | 2024-06-14 | ch-Southern California | Temecula USA | 3.3 | Alexander Costello | Vladimir Akopian | 1/2-1/2 | 73 | Open |
| 40 | 2024-06-14 | ch-Southern California | Temecula USA | 2.2 | Eduard Hakobyan | Alexander Costello | 1-0 | 40 | Open |
| 41 | 2024-06-13 | ch-Southern California | Temecula USA | 1.4 | Alexander Costello | Melikset Khachiyan | 1/2-1/2 | 45 | Open |
| 42 | 2024-06-11 | Titled Tue 11th Jun Late | chess.com INT | 4 | Adam Kujawski | Alexander Costello | 1-0 | 35 | Open |
| 43 | 2024-06-11 | Titled Tue 11th Jun Late | chess.com INT | 3 | Alexander Costello | Gabriel Lenoir Ibacache | 1-0 | 26 | Open |
| 44 | 2024-06-11 | Titled Tue 11th Jun Late | chess.com INT | 2 | Aleksa Micic | Alexander Costello | 1-0 | 40 | Open |
| 45 | 2024-06-11 | Titled Tue 11th Jun Late | chess.com INT | 1 | Alexander Costello | Sujana Lohani | 0-1 | 35 | Open |
| 46 | 2024-06-04 | Titled Tue 4th Jun Late | chess.com INT | 9 | Alexander Costello | Marcin Krzyzanowski | 0-1 | 52 | Open |
| 47 | 2024-06-04 | Titled Tue 4th Jun Late | chess.com INT | 8 | Alexander Costello | Krzysztof Jakubowski | 1-0 | 23 | Open |
| 48 | 2024-06-04 | Titled Tue 4th Jun Late | chess.com INT | 7 | Tanitoluwa Adewumi | Alexander Costello | 1/2-1/2 | 64 | Open |
| 49 | 2024-06-04 | Titled Tue 4th Jun Late | chess.com INT | 6 | Francisco Fiorito | Alexander Costello | 0-1 | 53 | Open |
| 50 | 2024-06-04 | Titled Tue 4th Jun Late | chess.com INT | 5 | Alexander Costello | Tufan Can Uzuner | 1-0 | 34 | Open |
| 51 | 2024-06-04 | Titled Tue 4th Jun Late | chess.com INT | 4 | Floryan Eugene | Alexander Costello | 1-0 | 36 | Open |
| 52 | 2024-06-04 | Titled Tue 4th Jun Late | chess.com INT | 3 | Ilan Schnaider | Alexander Costello | 0-1 | 64 | Open |
| 53 | 2024-06-04 | Titled Tue 4th Jun Late | chess.com INT | 2 | Alexander Costello | Marya Demina | 1-0 | 30 | Open |
| 54 | 2024-06-04 | Titled Tue 4th Jun Late | chess.com INT | 1 | Ivan Yeletsky | Alexander Costello | 1-0 | 24 | Open |
| 55 | 2024-06-04 | Titled Tue 4th Jun Late | chess.com INT | 11 | Alexander Costello | Mikayel Manvelyan | 1-0 | 76 | Open |
| 56 | 2024-06-04 | Titled Tue 4th Jun Late | chess.com INT | 10 | Meri Arabidze | Alexander Costello | 1/2-1/2 | 85 | Open |
| 57 | 2023-07-27 | 56th Biel Master Open | Biel SUI | 10.34 | Cocoro Matsumura | Alexander Costello | 0-1 | 74 | Open |
| 58 | 2023-07-26 | 56th Biel Master Open | Biel SUI | 9.33 | Alexander Costello | Robert Prieb | 1/2-1/2 | 88 | Open |
| 59 | 2023-07-25 | 56th Biel Master Open | Biel SUI | 8.23 | Dieter Morawietz | Alexander Costello | 1-0 | 34 | Open |
| 60 | 2023-07-24 | 56th Biel Master Open | Biel SUI | 7.33 | Alexander Costello | Moritz Valentin Collin | 1-0 | 26 | Open |
| 61 | 2023-07-23 | 56th Biel Master Open | Biel SUI | 6.24 | Irine Kharisma Sukandar | Alexander Costello | 1-0 | 67 | Open |
| 62 | 2023-07-21 | 56th Biel Master Open | Biel SUI | 5.27 | Alexander Costello | Georg Seul | 1/2-1/2 | 26 | Open |
| 63 | 2023-07-20 | 56th Biel Master Open | Biel SUI | 4.37 | Akshit Kumar J | Alexander Costello | 0-1 | 41 | Open |
| 64 | 2023-07-19 | 56th Biel Master Open | Biel SUI | 3.23 | Alexander Costello | Vantika Agrawal | 0-1 | 52 | Open |
| 65 | 2023-07-18 | 56th Biel Master Open | Biel SUI | 2.42 | Niels Stijve | Alexander Costello | 0-1 | 37 | Open |
| 66 | 2023-07-17 | 56th Biel Master Open | Biel SUI | 1.12 | Alexander Costello | Shawn Rodrigue-Lemieux | 0-1 | 40 | Open |
| 67 | 2023-06-18 | National Open 2023 | Las Vegas USA | 9.19 | Alexander Costello | Zoey Tang | 1-0 | 69 | Open |
| 68 | 2023-06-17 | National Open 2023 | Las Vegas USA | 6.17 | Nico Chasin | Alexander Costello | 1-0 | 62 | Open |
| 69 | 2023-06-16 | National Open 2023 | Las Vegas USA | 5.12 | Alexander Costello | Mark Heimann | 1/2-1/2 | 45 | Open |
| 70 | 2023-06-15 | National Open 2023 | Las Vegas USA | 2.16 | Tommy Wen | Alexander Costello | 1-0 | 67 | Open |
| 71 | 2022-11-23 | US Chess Masters 2022 | Charlotte USA | 1.7 | Nikolas Theodorou | Alexander Costello | 1-0 | 38 | Open |
| 72 | 2022-11-12 | chess.com SpeedChess Q2Sw | chess.com INT | 9 | Alexander Costello | Nebojsa M Ristic | 0-1 | 55 | Open |
| 73 | 2022-11-12 | chess.com SpeedChess Q2Sw | chess.com INT | 8 | Alexander Costello | Eric Hansen | 0-1 | 35 | Open |
| 74 | 2022-11-12 | chess.com SpeedChess Q2Sw | chess.com INT | 7 | Denes Boros | Alexander Costello | 1-0 | 40 | Open |
| 75 | 2022-11-12 | chess.com SpeedChess Q2Sw | chess.com INT | 6 | Alexander Costello | Kirill Klukin | 1-0 | 35 | Open |
| 76 | 2022-11-12 | chess.com SpeedChess Q2Sw | chess.com INT | 5 | Alexander Donchenko | Alexander Costello | 1-0 | 37 | Open |
| 77 | 2022-11-12 | chess.com SpeedChess Q2Sw | chess.com INT | 4 | Georg Meier | Alexander Costello | 0-1 | 40 | Open |
| 78 | 2022-11-12 | chess.com SpeedChess Q2Sw | chess.com INT | 3 | Alexander Costello | Zbigniew Pakleza | 0-1 | 35 | Open |
| 79 | 2022-11-12 | chess.com SpeedChess Q2Sw | chess.com INT | 2 | Alexander Costello | Srihari L R | 1-0 | 56 | Open |
| 80 | 2022-11-12 | chess.com SpeedChess Q2Sw | chess.com INT | 1 | Marko Nenezic | Alexander Costello | 1/2-1/2 | 48 | Open |
| 81 | 2022-11-12 | chess.com SpeedChess Q2Sw | chess.com INT | 14 | Alexander Costello | Viacheslav Mikhailov | 1-0 | 49 | Open |
| 82 | 2022-11-12 | chess.com SpeedChess Q2Sw | chess.com INT | 13 | Przemyslaw Koc | Alexander Costello | 1-0 | 36 | Open |
| 83 | 2022-11-12 | chess.com SpeedChess Q2Sw | chess.com INT | 12 | Alexander Costello | Artem Sadovsky | 1-0 | 46 | Open |
| 84 | 2022-11-12 | chess.com SpeedChess Q2Sw | chess.com INT | 11 | Alexander Costello | Joachim Mouhamad | 1-0 | 39 | Open |
| 85 | 2022-11-12 | chess.com SpeedChess Q2Sw | chess.com INT | 10 | Juan Sebastian Melian | Alexander Costello | 1-0 | 24 | Open |
| 86 | 2022-08-07 | 122nd US Open 2022 | Rancho Mirage USA | 9.4 | Alexander Costello | Varuzhan Akobian | 1/2-1/2 | 72 | Open |
| 87 | 2022-08-06 | 122nd US Open 2022 | Rancho Mirage USA | 8.11 | Rose Atwell | Alexander Costello | 0-1 | 43 | Open |
| 88 | 2022-08-05 | 122nd US Open 2022 | Rancho Mirage USA | 7.14 | Alexander Costello | Grant Oen | 1-0 | 39 | Open |
| 89 | 2022-08-04 | 122nd US Open 2022 | Rancho Mirage USA | 6.7 | Gabriel Eidelman | Alexander Costello | 1/2-1/2 | 37 | Open |
| 90 | 2022-08-03 | 122nd US Open 2022 | Rancho Mirage USA | 5.8 | Alexander Costello | Andrew Wang | 1-0 | 41 | Open |
| 91 | 2022-08-02 | 122nd US Open 2022 | Rancho Mirage USA | 4.3 | Semen Khanin | Alexander Costello | 1-0 | 38 | Open |
| 92 | 2022-08-01 | 122nd US Open 2022 | Rancho Mirage USA | 3.9 | Alexander Costello | David Gasparyan | 1-0 | 31 | Open |
| 93 | 2022-07-31 | 122nd US Open 2022 | Rancho Mirage USA | 2.1 | Yiding Lu | Alexander Costello | 0-1 | 32 | Open |
| 94 | 2022-07-30 | 122nd US Open 2022 | Rancho Mirage USA | 1.1 | Alexander Costello | Jacob Teitelman | 1-0 | 30 | Open |
| 95 | 2021-12-27 | 31st North American Open | Las Vegas USA | 4 | Arsal Gardezi | Alexander Costello | 0-1 | 14 | Open |
| 96 | 2021-12-27 | 31st North American Open | Las Vegas USA | 3 | Alexander Costello | Awonder Liang | 0-1 | 14 | Open |
| 97 | 2021-12-26 | 31st North American Open | Las Vegas USA | 2 | Alexander Shabalov | Alexander Costello | 1/2-1/2 | 38 | Open |
| 98 | 2021-06-18 | National Open 2021 | Las Vegas USA | 4.22 | Christopher Woojin Yoo | Alexander Costello | 1-0 | 60 | Open |
| 99 | 2021-06-17 | National Open 2021 | Las Vegas USA | 2.17 | Atulya Shetty | Alexander Costello | 1-0 | 63 | Open |
| 100 | 2020-08-09 | 48th Annual World Open | ICC INT | 9 | Alexander Costello | Alice Lee | 1/2-1/2 | 50 | Open |
| 101 | 2020-08-09 | 48th Annual World Open | ICC INT | 8 | Alex Yuxuan Wang | Alexander Costello | 0-1 | 30 | Open |
| 102 | 2020-08-09 | 48th Annual World Open | ICC INT | 7 | Alexander Costello | Davis Zong | 0-1 | 54 | Open |
| 103 | 2020-08-08 | 48th Annual World Open | ICC INT | 6 | Tanmay Khattar | Alexander Costello | 0-1 | 25 | Open |
| 104 | 2020-08-08 | 48th Annual World Open | ICC INT | 5 | Alexander Costello | Krishna Nathan | 0-1 | 42 | Open |
| 105 | 2020-08-08 | 48th Annual World Open | ICC INT | 4 | Andy Woodward | Alexander Costello | 1-0 | 35 | Open |
| 106 | 2020-08-07 | 48th Annual World Open | ICC INT | 3 | Alexander Costello | Samuel Sevian | 0-1 | 60 | Open |
| 107 | 2020-08-07 | 48th Annual World Open | ICC INT | 2 | Alexander Costello | Jeffrey Quirke | 1-0 | 57 | Open |
| 108 | 2020-08-07 | 48th Annual World Open | ICC INT | 1 | Kevin Xu | Alexander Costello | 1/2-1/2 | 63 | Open |
| 109 | 2020-05-25 | PNWCC Masters 2020 | chess.com INT | 9.23 | Jason Lu | Alexander Costello | 1-0 | 46 | Open |
| 110 | 2020-05-25 | PNWCC Masters 2020 | chess.com INT | 8.18 | Alexander Costello | Justin Sarkar | 0-1 | 41 | Open |
| 111 | 2020-05-25 | PNWCC Masters 2020 | chess.com INT | 7.13 | Carlos Antonio Hevia Alejano | Alexander Costello | 1/2-1/2 | 83 | Open |
| 112 | 2020-05-24 | PNWCC Masters 2020 | chess.com INT | 6.24 | Alexander Costello | Hersh Singh | 1-0 | 53 | Open |
| 113 | 2020-05-24 | PNWCC Masters 2020 | chess.com INT | 5.3 | Alexander Yang | Alexander Costello | 0-1 | 69 | Open |
| 114 | 2020-05-24 | PNWCC Masters 2020 | chess.com INT | 4.24 | Alexander Costello | Nguyen Thanh Thuy Tien | 0-1 | 44 | Open |
| 115 | 2020-05-23 | PNWCC Masters 2020 | chess.com INT | 3.11 | Andrew Tang | Alexander Costello | 1-0 | 42 | Open |
| 116 | 2020-05-23 | PNWCC Masters 2020 | chess.com INT | 2.12 | Alexander Costello | Marin Bosiocic | 1/2-1/2 | 31 | Open |
| 117 | 2020-05-23 | PNWCC Masters 2020 | chess.com INT | 1.36 | Andrew Feng | Alexander Costello | 0-1 | 55 | Open |
| 118 | 2019-12-29 | 29th North American Open | Las Vegas USA | 7 | Alexander Costello | Mark Paragua | 0-1 | 34 | Open |
| 119 | 2019-12-27 | 29th North American Open | Las Vegas USA | 4.1 | Hovhannes Gabuzyan | Alexander Costello | 1-0 | 26 | Open |
| 120 | 2019-06-23 | ch-USA Cadet 2019 | San Jose CA USA | 7.4 | Alexander Costello | Josiah Stearman | 0-1 | 33 | Open |
| 121 | 2019-06-22 | ch-USA Cadet 2019 | San Jose CA USA | 6.4 | Alexander Costello | Robert Shlyakhtenko | 0-1 | 50 | Open |
| 122 | 2019-06-21 | ch-USA Cadet 2019 | San Jose CA USA | 5.2 | Rochelle Wu | Alexander Costello | 0-1 | 87 | Open |
| 123 | 2019-06-21 | ch-USA Cadet 2019 | San Jose CA USA | 4.3 | Alexander Costello | Hans Moke Niemann | 0-1 | 45 | Open |
| 124 | 2019-06-20 | ch-USA Cadet 2019 | San Jose CA USA | 3.3 | Justin Wang | Alexander Costello | 1-0 | 58 | Open |
| 125 | 2019-06-20 | ch-USA Cadet 2019 | San Jose CA USA | 2.2 | Alexander Costello | Andrew Hong | 0-1 | 93 | Open |
| 126 | 2019-06-19 | ch-USA Cadet 2019 | San Jose CA USA | 1.4 | Ivan Ke | Alexander Costello | 1-0 | 39 | Open |
| 127 | 2019-06-14 | National Open 2019 | Las Vegas USA | 4 | Atulya Shetty | Alexander Costello | 1/2-1/2 | 36 | Open |
| 128 | 2019-06-13 | National Open 2019 | Las Vegas USA | 2 | Ruifeng Li | Alexander Costello | 1-0 | 67 | Open |
| 129 | 2019-04-28 | National Junior High K9 | Grapevine USA | 7.2 | Anish Vivekananthan | Alexander Costello | 1/2-1/2 | 39 | Open |
| 130 | 2019-04-28 | National Junior High K9 | Grapevine USA | 6.4 | Alexander Costello | Eric Wu | 1-0 | 56 | Open |
| 131 | 2019-04-26 | National Junior High K9 | Grapevine USA | 1.1 | Zachary Pan | Alexander Costello | 1-0 | 45 | Open |
| 132 | 2019-03-07 | PRO League Group Stage | chess.com INT | 9 | Brandon G I Clarke | Alexander Costello | 1-0 | 43 | Open |
| 133 | 2019-03-07 | PRO League Group Stage | chess.com INT | 9 | Alexey Sarana | Alexander Costello | 1-0 | 44 | Open |
| 134 | 2019-03-07 | PRO League Group Stage | chess.com INT | 9 | Alexander Costello | Daniel Howard Fernandez | 0-1 | 50 | Open |
| 135 | 2019-03-07 | PRO League Group Stage | chess.com INT | 9 | Alexander Costello | Max Illingworth | 1/2-1/2 | 46 | Open |
| 136 | 2019-01-07 | Bay Area Int Open 2019 | Burlingame USA | 9.28 | Zurab Javakhadze | Alexander Costello | 0-1 | 60 | Open |
| 137 | 2019-01-06 | Bay Area Int Open 2019 | Burlingame USA | 8.3 | Alexander Costello | Mauro Ampie | 1/2-1/2 | 21 | Open |
| 138 | 2019-01-05 | Bay Area Int Open 2019 | Burlingame USA | 7.21 | Brandon Jacobson | Alexander Costello | 1-0 | 36 | Open |
| 139 | 2019-01-05 | Bay Area Int Open 2019 | Burlingame USA | 6.28 | Alexander Costello | Ezra Paul Chambers | 1-0 | 20 | Open |
| 140 | 2019-01-04 | Bay Area Int Open 2019 | Burlingame USA | 5.34 | Jack Zhu | Alexander Costello | 0-1 | 39 | Open |
| 141 | 2019-01-03 | Bay Area Int Open 2019 | Burlingame USA | 4.39 | Teemu Virtanen | Alexander Costello | 1/2-1/2 | 47 | Open |
| 142 | 2019-01-03 | Bay Area Int Open 2019 | Burlingame USA | 3.32 | Alexander Costello | Andrew Hong | 0-1 | 32 | Open |
| 143 | 2019-01-02 | Bay Area Int Open 2019 | Burlingame USA | 2.51 | John Canessa | Alexander Costello | 0-1 | 66 | Open |
| 144 | 2019-01-01 | Bay Area Int Open 2019 | Burlingame USA | 1.25 | Alexander Costello | Kevin Wang | 0-1 | 66 | Open |
| 145 | 2018-11-25 | 54th American Open 2018 | Costa Mesa USA | 7 | Alexander Costello | Alexander Chua | 1-0 | 36 | Open |
| 146 | 2018-11-23 | 54th American Open 2018 | Costa Mesa USA | 3 | Rushaan Mahajan | Alexander Costello | 0-1 | 26 | Open |
| 147 | 2018-06-21 | National Open 2018 | Las Vegas USA | 1.2 | Alexander Costello | Illya Nyzhnyk | 0-1 | 51 | Open |
| 148 | 2017-11-24 | 53rd American Open 2017 | Costa Mesa USA | 3 | Brandon Burrows | Alexander Costello | 0-1 | 38 | Open |
| 149 | 2017-11-23 | 53rd American Open 2017 | Costa Mesa USA | 1 | Alexander Costello | Andrey Baryshpolets | 0-1 | 34 | Open |
| 150 | 2017-09-26 | World Youth Open U14 2017 | Montevideo URU | 11.2 | Pawel Teclaf | Alexander Costello | 1/2-1/2 | 49 | Open |
| 151 | 2017-09-25 | World Youth Open U14 2017 | Montevideo URU | 10.8 | Alexander Costello | Miguel Angel Soto | 1-0 | 40 | Open |
| 152 | 2017-09-24 | World Youth Open U14 2017 | Montevideo URU | 9.8 | Alexander Costello | Nikhil Kumar | 1-0 | 29 | Open |
| 153 | 2017-09-23 | World Youth Open U14 2017 | Montevideo URU | 8.6 | Noah Fecker | Alexander Costello | 1-0 | 54 | Open |
| 154 | 2017-09-22 | World Youth Open U14 2017 | Montevideo URU | 7.11 | Alexander Costello | Nathan Felipe Filgueiras | 1-0 | 26 | Open |
| 155 | 2017-09-22 | World Youth Open U14 2017 | Montevideo URU | 6.16 | Jhoan Mollo | Alexander Costello | 0-1 | 29 | Open |
| 156 | 2017-09-20 | World Youth Open U14 2017 | Montevideo URU | 5.7 | Aydin Turgut | Alexander Costello | 1-0 | 45 | Open |
| 157 | 2017-09-19 | World Youth Open U14 2017 | Montevideo URU | 4.2 | Alexander Costello | Dambasuren Batsuren | 0-1 | 78 | Open |
| 158 | 2017-09-18 | World Youth Open U14 2017 | Montevideo URU | 3.9 | Alexander Costello | Koustav Chatterjee | 1-0 | 26 | Open |
| 159 | 2017-09-18 | World Youth Open U14 2017 | Montevideo URU | 2.2 | Arseniy Nesterov | Alexander Costello | 0-1 | 33 | Open |
| 160 | 2017-09-17 | World Youth Open U14 2017 | Montevideo URU | 1.27 | Alexander Costello | Ilya Stetsenko | 1-0 | 36 | Open |
| 161 | 2015-10-20 | US Chess League 2015 | ICC INT | 9 | Bryce Tiglon | Alexander Costello | 1-0 | 59 | Open |
| 162 | 2015-09-16 | US Chess League 2015 | ICC INT | 4 | Alexander Costello | Robby Adamson | 0-1 | 60 | Open |
| 163 | 2015-09-08 | US Chess League 2015 | ICC INT | 3 | Elliott Liu | Alexander Costello | 1-0 | 35 | Open |
| 164 | 2015-09-02 | US Chess League 2015 | ICC INT | 2 | Alexander Costello | Byambaa Uyanga | 1/2-1/2 | 30 | Open |
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