| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. A Grinza vs S Sartori |
| 1-0 | 56 | 1985 | Reggio Emilia-B 1985/86 | E39 Nimzo-Indian, Classical, Pirc Variation |
| 27. C D Meyer vs A Grinza |
| 1-0 | 89 | 1985 | Reggio Emilia-B 1985/86 | B13 Caro-Kann, Exchange |
| 28. A Grinza vs G de Boer |
| ½-½ | 20 | 1985 | Reggio Emilia-B 1985/86 | E30 Nimzo-Indian, Leningrad |
| 29. C Maier vs A Grinza |
| 1-0 | 49 | 1985 | Reggio Emilia-B 1985/86 | B12 Caro-Kann Defense |
| 30. A Grinza vs R Mantovani |
| 0-1 | 28 | 1986 | Reggio Emilia-B 1985/86 | A10 English |
| 31. R Messa vs A Grinza |
| 0-1 | 32 | 1986 | Reggio Emilia-B 1985/86 | B18 Caro-Kann, Classical |
| 32. O Popovych vs A Grinza |
| ½-½ | 68 | 1986 | Reggio Emilia-B 1985/86 | B13 Caro-Kann, Exchange |
| 33. A Grinza vs V Bukal Sr |
| 0-1 | 55 | 1986 | Reggio Emilia-B 1985/86 | A31 English, Symmetrical, Benoni Formation |
| 34. G Falchetta vs A Grinza |
| ½-½ | 33 | 1986 | Reggio Emilia-B 1985/86 | C11 French |
| 35. A Grinza vs B Belotti |
| 1-0 | 53 | 1986 | Reggio Emilia-B 1985/86 | A58 Benko Gambit |
| 36. J Costa vs A Grinza |
| ½-½ | 56 | 1986 | Reggio Emilia-B 1985/86 | A30 English, Symmetrical |
| 37. A Grinza vs A Martorelli |
| ½-½ | 7 | 1986 | Reggio Emilia-B 1985/86 | E45 Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation |
| 38. S Turci vs A Grinza |
| ½-½ | 22 | 1987 | Reggio Emilia-B 1987/88 | C33 King's Gambit Accepted |
| 39. A Grinza vs G Borgo |
| ½-½ | 25 | 1987 | Reggio Emilia-B 1987/88 | A31 English, Symmetrical, Benoni Formation |
| 40. R Medancic vs A Grinza |
| 0-1 | 57 | 1987 | Reggio Emilia-B 1987/88 | A52 Budapest Gambit |
| 41. A Grinza vs S Wagman |
| ½-½ | 48 | 1987 | Reggio Emilia-B 1987/88 | E06 Catalan, Closed, 5.Nf3 |
| 42. E Paoli vs A Grinza |
| ½-½ | 12 | 1987 | Reggio Emilia-B 1987/88 | B13 Caro-Kann, Exchange |
| 43. S Turci vs A Grinza |
| ½-½ | 22 | 1988 | Reggio Emilia-B | C33 King's Gambit Accepted |
| 44. A Grinza vs M Klauser |
| 0-1 | 31 | 1988 | Reggio Emilia-B 1987/88 | E00 Queen's Pawn Game |
| 45. B Belotti vs A Grinza |
| 1-0 | 21 | 1988 | Reggio Emilia-B 1987/88 | B15 Caro-Kann |
| 46. A Grinza vs Z Beil |
| ½-½ | 61 | 1988 | Reggio Emilia-B 1987/88 | D13 Queen's Gambit Declined Slav, Exchange Variation |
| 47. V Anceschi vs A Grinza |
| 1-0 | 24 | 1988 | Reggio Emilia-B 1987/88 | B16 Caro-Kann, Bronstein-Larsen Variation |
| 48. V Bukal Sr vs A Grinza |
| ½-½ | 35 | 1988 | Reggio Emilia-B 1987/88 | A21 English |
| 49. A Grinza vs C Rossi |
| ½-½ | 10 | 1988 | Reggio Emilia-B 1987/88 | E00 Queen's Pawn Game |
| 50. A Grinza vs E Mariano |
| 0-1 | 51 | 1997 | Montecatini Terme Open | D67 Queen's Gambit Declined, Orthodox Defense, Bd3 line |
Kibitzing
