| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. K Georgiev vs A Mastrovasilis |
| 1-0 | 56 | 1992 | Komotini op | C96 Ruy Lopez, Closed |
| 2. H Yin vs A Mastrovasilis |
| ½-½ | 31 | 1993 | World Youth Championship (Under-14) | C84 Ruy Lopez, Closed |
| 3. A Mastrovasilis vs R Svicevic |
| 1-0 | 37 | 1993 | World Youth Championship (Under-14) | B25 Sicilian, Closed |
| 4. Leko vs A Mastrovasilis |
| 1-0 | 26 | 1993 | World Youth Championship (Under-14) | C43 Petrov, Modern Attack |
| 5. A Mastrovasilis vs P Simacek |
| 0-1 | 38 | 1993 | World Youth Championship (Under-14) | B06 Robatsch |
| 6. L Pergel vs A Mastrovasilis |
| ½-½ | 32 | 1993 | World Youth Championship (Under-14) | C54 Giuoco Piano |
| 7. A Mastrovasilis vs A Castillo |
| 1-0 | 41 | 1993 | World Youth Championship (Under-14) | C89 Ruy Lopez, Marshall |
| 8. P Blehm vs A Mastrovasilis |
| 1-0 | 76 | 1993 | World Youth Championship (Under-14) | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 9. F Bilale vs A Mastrovasilis |
| 0-1 | 39 | 1993 | World Youth Championship (Under-14) | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 10. A Mastrovasilis vs K Kryzius |
| ½-½ | 55 | 1993 | World Youth Championship (Under-14) | B24 Sicilian, Closed |
| 11. A Mastrovasilis vs Z Janahi |
| ½-½ | 62 | 1993 | World Youth Championship (Under-14) | A07 King's Indian Attack |
| 12. A Mastrovasilis vs T Mifsud |
| 1-0 | 67 | 1993 | World Youth Championship (Under-14) | B20 Sicilian |
| 13. T Gelashvili vs A Mastrovasilis |
| ½-½ | 55 | 1994 | EU-ch U18 | A13 English |
| 14. A Mastrovasilis vs E Dervishi |
| 1-0 | 66 | 1994 | EU-ch U18 | D35 Queen's Gambit Declined |
| 15. A Mastrovasilis vs A Naumann |
| 1-0 | 66 | 1995 | World Championship U16 (boys) | D45 Queen's Gambit Declined Semi-Slav |
| 16. Motylev vs A Mastrovasilis |
| 1-0 | 34 | 1995 | World Championship U16 (boys) | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 17. H Stevic vs A Mastrovasilis |
| 1-0 | 40 | 1995 | World Championship U16 (boys) | B22 Sicilian, Alapin |
| 18. A Mastrovasilis vs R Leitao |
| ½-½ | 40 | 1995 | World Championship U16 (boys) | D45 Queen's Gambit Declined Semi-Slav |
| 19. J Pinski vs A Mastrovasilis |
| 0-1 | 39 | 1995 | World Championship U16 (boys) | A17 English |
| 20. A Mastrovasilis vs M Parligras |
| 1-0 | 29 | 1995 | World Championship U16 (boys) | E41 Nimzo-Indian |
| 21. Kasimdzhanov vs A Mastrovasilis |
| ½-½ | 46 | 1995 | World Championship U16 (boys) | A46 Queen's Pawn Game |
| 22. A Mastrovasilis vs Sadvakasov |
| 1-0 | 46 | 1995 | World Championship U16 (boys) | E80 King's Indian, Samisch Variation |
| 23. A Mastrovasilis vs G Bakhtadze |
| 1-0 | 35 | 1995 | World Championship U16 (boys) | E80 King's Indian, Samisch Variation |
| 24. C Schreiber vs A Mastrovasilis |
| 0-1 | 34 | 1995 | World Championship U16 (boys) | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 25. A Mastrovasilis vs S Yu |
| ½-½ | 37 | 1995 | World Championship U16 (boys) | E41 Nimzo-Indian |
Kibitzing
