| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 551. D Kadric vs A Mastrovasilis |
| ½-½ | 105 | 2022 | Sharjah Masters | C53 Giuoco Piano |
| 552. A Etienne vs A Mastrovasilis |
| 0-1 | 37 | 2022 | Chennai Olympiad | A13 English |
| 553. A Mastrovasilis vs P Makoli |
| 1-0 | 48 | 2022 | Chennai Olympiad | D20 Queen's Gambit Accepted |
| 554. A Erigaisi vs A Mastrovasilis |
| 1-0 | 51 | 2022 | Chennai Olympiad | D35 Queen's Gambit Declined |
| 555. A Mastrovasilis vs A Macovei |
| ½-½ | 40 | 2022 | Chennai Olympiad | D41 Queen's Gambit Declined, Semi-Tarrasch |
| 556. S Docx vs A Mastrovasilis |
| 0-1 | 88 | 2022 | Chennai Olympiad | C58 Two Knights |
| 557. J P Gomez vs A Mastrovasilis |
| ½-½ | 30 | 2022 | Chennai Olympiad | C67 Ruy Lopez |
| 558. A Mastrovasilis vs So |
| 0-1 | 54 | 2022 | Chennai Olympiad | E48 Nimzo-Indian, 4.e3 O-O 5.Bd3 d5 |
| 559. Fressinet vs A Mastrovasilis |
| ½-½ | 64 | 2022 | Chennai Olympiad | E04 Catalan, Open, 5.Nf3 |
| 560. A Barseghyan vs A Mastrovasilis |
| ½-½ | 41 | 2023 | European Championship | D35 Queen's Gambit Declined |
| 561. A Mastrovasilis vs A Secheres |
| 0-1 | 68 | 2023 | European Championship | E63 King's Indian, Fianchetto, Panno Variation |
| 562. I Kalogeris vs A Mastrovasilis |
| ½-½ | 23 | 2023 | European Championship | C67 Ruy Lopez |
| 563. A Mastrovasilis vs S Vetokhin |
| 0-1 | 31 | 2023 | European Championship | D02 Queen's Pawn Game |
| 564. H C Agdelen vs A Mastrovasilis |
| ½-½ | 48 | 2023 | European Championship | C55 Two Knights Defense |
| 565. A Mastrovasilis vs A Gandhi |
| 1-0 | 43 | 2023 | Arad Open | A13 English |
| 566. A Mastrovasilis vs Pichot |
| ½-½ | 68 | 2023 | Arad Open | E20 Nimzo-Indian |
| 567. T Brnusak vs A Mastrovasilis |
| ½-½ | 43 | 2023 | Arad Open | B40 Sicilian |
| 568. A Mastrovasilis vs T Lazov |
| 1-0 | 29 | 2023 | Arad Open | E70 King's Indian |
| 569. A Mastrovasilis vs Martirosyan |
| 0-1 | 81 | 2023 | Arad Open | E20 Nimzo-Indian |
| 570. C Patrascu vs A Mastrovasilis |
| 1-0 | 52 | 2023 | Arad Open | C78 Ruy Lopez |
Kibitzing
