| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. A Giaccio vs M Martens |
| 0-1 | 56 | 1990 | World Junior Championship | E11 Bogo-Indian Defense |
| 27. A Ribas vs A Giaccio |
| 0-1 | 24 | 1990 | World Junior Championship | C18 French, Winawer |
| 28. G Hernandez Guerrero vs A Giaccio |
| 1-0 | 44 | 1990 | World Junior Championship | C19 French, Winawer, Advance |
| 29. A Giaccio vs J Sorensen |
| 0-1 | 36 | 1990 | World Junior Championship | C15 French, Winawer |
| 30. A Giaccio vs J Egger |
| 1-0 | 49 | 1990 | World Junior Championship | E97 King's Indian |
| 31. A Giaccio vs S Minero Pineda |
| 1-0 | 67 | 1990 | World Junior Championship | C14 French, Classical |
| 32. C Lutz vs A Giaccio |
| 1-0 | 61 | 1990 | World Junior Championship | E91 King's Indian |
| 33. P Sjodahl vs A Giaccio |
| ½-½ | 50 | 1990 | World Junior Championship | E00 Queen's Pawn Game |
| 34. S Silva Lillo vs A Giaccio |
| 1-0 | 20 | 1990 | World Junior Championship | D02 Queen's Pawn Game |
| 35. A Giaccio vs M Stephens |
| 0-1 | 30 | 1990 | World Junior Championship | C15 French, Winawer |
| 36. A Giaccio vs E Figueroa |
| 1-0 | 56 | 1991 | Mar del Plata Open | B00 Uncommon King's Pawn Opening |
| 37. A Giaccio vs Fernando Egger |
| 1-0 | 36 | 1991 | Villa Ballester op | C11 French |
| 38. A Giaccio vs F Fiorito |
| ½-½ | 47 | 1991 | Mar del Plata Open | B62 Sicilian, Richter-Rauzer |
| 39. A Giaccio vs C Dolezal |
| 1-0 | 32 | 1991 | Buenos Aires op GP3 | B01 Scandinavian |
| 40. A Giaccio vs G Cativelli |
| ½-½ | 63 | 1991 | Buenos Aires GP | B10 Caro-Kann |
| 41. A Giaccio vs J Luis Rivero |
| 0-1 | 50 | 1991 | Buenos Aires op GP3 | C11 French |
| 42. A Giaccio vs R Galindo |
| 1-0 | 22 | 1991 | Buenos Aires GEBA-B | A07 King's Indian Attack |
| 43. A Giaccio vs J Bademian Orchanian |
| 1-0 | 45 | 1991 | Mar del Plata Open | A00 Uncommon Opening |
| 44. A Giaccio vs A Aparicio |
 | 1-0 | 22 | 1991 | ARG-ch sf | B46 Sicilian, Taimanov Variation |
| 45. A Giaccio vs P Tanner |
| ½-½ | 54 | 1991 | Buenos Aires GEBA-B | D61 Queen's Gambit Declined, Orthodox, Rubinstein Attack |
| 46. A Giaccio vs C Valiente |
| ½-½ | 18 | 1991 | Mar del Plata Open | B46 Sicilian, Taimanov Variation |
| 47. A Giaccio vs Walter Magnelli |
| 1-0 | 25 | 1991 | Villa Ballester op | D35 Queen's Gambit Declined |
| 48. A Giaccio vs Arturo Samur |
| ½-½ | 20 | 1991 | Buenos Aires GEBA-B | A43 Old Benoni |
| 49. A Giaccio vs D del Rey |
| 1-0 | 31 | 1991 | Buenos Aires GP | C14 French, Classical |
| 50. A Giaccio vs V Pina |
| ½-½ | 43 | 1991 | Mar del Plata Open | C12 French, McCutcheon |
Kibitzing
