| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. M Fraschini vs A Giaccio |
| 0-1 | 40 | 1989 | Buenos Aires FMDA tt | A62 Benoni, Fianchetto Variation |
| 2. A Giaccio vs E Julia |
| ½-½ | 49 | 1989 | Buenos Aires FMDA tt | B30 Sicilian |
| 3. S Pla vs A Giaccio |
| ½-½ | 66 | 1989 | Buenos Aires FMDA tt | E11 Bogo-Indian Defense |
| 4. A Giaccio vs A Zukerfeld |
| 1-0 | 65 | 1989 | Buenos Aires BCA op | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 5. M Playa vs A Giaccio |
| 1-0 | 27 | 1990 | Merlo fin U20 | C12 French, McCutcheon |
| 6. A Giaccio vs M Pardo |
| 1-0 | 39 | 1990 | Merlo U20 | A04 Reti Opening |
| 7. F Bertona vs A Giaccio |
| ½-½ | 31 | 1990 | Merlo U20 | C03 French, Tarrasch |
| 8. A Giaccio vs G Hernandez |
| 0-1 | 74 | 1990 | Merlo fin U20 | D24 Queen's Gambit Accepted |
| 9. A Giaccio vs A Paredes |
| 0-1 | 39 | 1990 | Merlo fin U20 | A35 English, Symmetrical |
| 10. A Giaccio vs C Oblitas |
| 1-0 | 57 | 1990 | Merlo fin U20 | E62 King's Indian, Fianchetto |
| 11. M J Tempone vs A Giaccio |
| ½-½ | 30 | 1990 | Buenos Aires FMDA | C02 French, Advance |
| 12. Eizykowicz vs A Giaccio |
| 0-1 | 26 | 1990 | 12th Buenos Aires GP | C50 Giuoco Piano |
| 13. A Giaccio vs S Schweber |
| 1-0 | 30 | 1990 | Buenos Aires GP 12th | B06 Robatsch |
| 14. D Barahona vs A Giaccio |
| ½-½ | 14 | 1990 | Merlo U20 | A07 King's Indian Attack |
| 15. D M Rodriguez Pineda vs A Giaccio |
| 0-1 | 41 | 1990 | Merlo U20 | D40 Queen's Gambit Declined, Semi-Tarrasch |
| 16. A Giaccio vs A C Rocha |
| 0-1 | 41 | 1990 | Buenos Aires BCA op | C77 Ruy Lopez |
| 17. S Minero Pineda vs A Giaccio |
| 1-0 | 41 | 1990 | Merlo fin U20 | E01 Catalan, Closed |
| 18. A Giaccio vs J Rubinetti |
| 0-1 | 64 | 1990 | Buenos Aires BCA op | C84 Ruy Lopez, Closed |
| 19. A Giaccio vs A Rodriguez Vila |
 | ½-½ | 68 | 1990 | Merlo U20 | C15 French, Winawer |
| 20. A Rodrigues vs A Giaccio |
| 0-1 | 34 | 1990 | Merlo U20 | C15 French, Winawer |
| 21. A Giaccio vs C Amura |
| 1-0 | 52 | 1990 | Merlo U20 | B40 Sicilian |
| 22. S Negri vs A Giaccio |
| 1-0 | 27 | 1990 | Buenos Aires FMDA | A04 Reti Opening |
| 23. R Garcia vs A Giaccio |
| ½-½ | 27 | 1990 | Buenos Aires GP 12th | A04 Reti Opening |
| 24. Z Varga vs A Giaccio |
| 0-1 | 21 | 1990 | World Junior Championship | C03 French, Tarrasch |
| 25. A Giaccio vs J Egger |
| 1-0 | 49 | 1990 | World Junior Championship | E97 King's Indian |
Kibitzing
