9 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Costa, Diogo | Barria, Jose | 0-1 | B06 | Round 9: Costa, Diogo - Barria, Jose | 2026-05-30 |
| Costa, Diogo | Prado, Vitor | 1-0 | B00 | Round 7: Costa, Diogo - Prado, Vitor | 2026-05-28 |
| Costa, Diogo | Polak, Aleksander | 0-1 | B12 | Round 5: Costa, Diogo - Polak, Aleksander | 2026-05-26 |
| Costa, Diogo | Gomez Alvarez, Alejandro | 1-0 | B03 | Round 3: Costa, Diogo - Gomez Alvarez, Alejandro | 2026-05-24 |
| Costa, Diogo | Jimenez Almeida, Luis David | 0-1 | B28 | Round 1: Costa, Diogo - Jimenez Almeida, Luis David | 2026-05-23 |