Male
FIDE ID:
Alexander Costello
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| ch-Southern California | 06/13/2024 | 2404 |  United States |
| 56th Biel Master Open | 07/17/2023 | 2298 |  Switzerland |
| National Open 2023 | 06/14/2023 | 2233 | United States |
| US Chess Masters 2022 | 11/23/2022 | 2364 | United States |
Alexander Costello Opening Repertoire with White pieces
| ECO | Opening | Games |
| B90 | Sicilian, Najdorf | 2 games |
| B09 | Pirc, Austrian attack | 1 games |
| B51 | Sicilian, Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack | 1 games |
| C79 | Ruy Lopez, Steinitz defence deferred (Russian defence) | 1 games |
Alexander Costello Opening Repertoire with Black pieces
| ECO | Opening | Games |
| B30 | Sicilian defence | 3 games |
| A15 | English, 1...Nf6 (Anglo-Indian defense) | 3 games |
| C95 | Ruy Lopez, closed, Breyer, 10.d4 | 2 games |
| C53 | Giuoco Piano | 2 games |
