| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. L Costa vs V Argote Heredia |
| ½-½ | 36 | 2023 | Spilimbergo Open | B93 Sicilian, Najdorf, 6.f4 |
| 27. A Martorelli vs L Costa |
| 0-1 | 47 | 2023 | Spilimbergo Open | C02 French, Advance |
| 28. P Wiebe vs L Costa |
| 0-1 | 44 | 2023 | Rilton Cup 2023/24 | A13 English |
| 29. L Costa vs B Lindberg |
| 1-0 | 61 | 2023 | Rilton Cup 2023/24 | C78 Ruy Lopez |
| 30. Rakesh Kumar Jena vs L Costa |
| ½-½ | 41 | 2023 | Rilton Cup 2023/24 | D02 Queen's Pawn Game |
| 31. L Costa vs J Ostlund |
| 0-1 | 45 | 2023 | Rilton Cup 2023/24 | C60 Ruy Lopez |
| 32. L Costa vs A Doraszelski |
| 1-0 | 63 | 2023 | Rilton Cup 2023/24 | B90 Sicilian, Najdorf |
| 33. M Oratovsky vs L Costa |
| 1-0 | 32 | 2024 | Rilton Cup 2023/24 | B15 Caro-Kann |
| 34. L Costa vs A Falkevall |
| 0-1 | 25 | 2024 | Rilton Cup 2023/24 | C79 Ruy Lopez, Steinitz Defense Deferred |
| 35. D Dragicevic vs L Costa |
| 0-1 | 25 | 2024 | Rilton Cup 2023/24 | D02 Queen's Pawn Game |
| 36. L Costa vs A Toepfer |
| 1-0 | 34 | 2024 | GRENKE Chess Open | B07 Pirc |
| 37. V Grahn vs L Costa |
| 0-1 | 47 | 2024 | GRENKE Chess Open | E04 Catalan, Open, 5.Nf3 |
| 38. L Costa vs J Wyss |
| 1-0 | 31 | 2024 | GRENKE Chess Open | C02 French, Advance |
| 39. O Reller vs L Costa |
| 0-1 | 42 | 2024 | GRENKE Chess Open | A14 English |
| 40. L Costa vs Kamsky |
| ½-½ | 21 | 2024 | GRENKE Chess Open | C67 Ruy Lopez |
| 41. Niemann vs L Costa |
| 1-0 | 49 | 2024 | GRENKE Chess Open | B12 Caro-Kann Defense |
| 42. L Costa vs O Elgersma |
| 1-0 | 46 | 2024 | GRENKE Chess Open | C02 French, Advance |
| 43. V Bochnicka Jr vs L Costa |
| 0-1 | 46 | 2024 | GRENKE Chess Open | C53 Giuoco Piano |
| 44. L Costa vs M Chigaev |
| 0-1 | 52 | 2024 | GRENKE Chess Open | C78 Ruy Lopez |
| 45. L Costa vs M Siekanska |
| 1-0 | 44 | 2024 | Sardinia World Open A | C55 Two Knights Defense |
| 46. J Chyzy vs L Costa |
| 1-0 | 39 | 2024 | Sardinia World Open A | C77 Ruy Lopez |
| 47. L Costa vs L Kurmangaliyeva |
| 1-0 | 41 | 2024 | Sardinia World Open A | C53 Giuoco Piano |
| 48. M Bifulco vs L Costa |
| 0-1 | 67 | 2024 | Sardinia World Open A | C48 Four Knights |
| 49. L Costa vs H E Tudor |
| ½-½ | 30 | 2024 | Sardinia World Open A | B80 Sicilian, Scheveningen |
| 50. R Krishnan vs L Costa |
| 0-1 | 45 | 2024 | Sardinia World Open A | E73 King's Indian |
Kibitzing
