| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. M Grassi vs B Manzardo |
| ½-½ | 25 | 1970 | Italian Championship | C63 Ruy Lopez, Schliemann Defense |
| 27. F Palmiotto vs M Grassi |
| 0-1 | 50 | 1970 | Italian Championship | B74 Sicilian, Dragon, Classical |
| 28. E Romani vs M Grassi |
| 0-1 | 53 | 1970 | Italian Championship | D04 Queen's Pawn Game |
| 29. M Grassi vs S Tatai |
| 0-1 | 40 | 1970 | Italian Championship | B92 Sicilian, Najdorf, Opocensky Variation |
| 30. G Primavera vs M Grassi |
| ½-½ | 8 | 1970 | Italian Championship | D85 Grunfeld |
| 31. I Farago vs M Grassi |
| 1-0 | 33 | 1989 | Trofeo Cristoforo Colombo | A41 Queen's Pawn Game (with ...d6) |
| 32. S Skembris vs M Grassi |
| 1-0 | 49 | 1989 | Trofeo Cristoforo Colombo | B08 Pirc, Classical |
| 33. M Grassi vs F Cirabisi |
| 1-0 | 25 | 1989 | Trofeo Cristoforo Colombo | A43 Old Benoni |
| 34. M Grassi vs F Guido |
| ½-½ | 45 | 1989 | Trofeo Cristoforo Colombo | A57 Benko Gambit |
| 35. M Grassi vs K Lerner |
| 0-1 | 28 | 1989 | Trofeo Cristoforo Colombo | E91 King's Indian |
| 36. J Hector vs M Grassi |
| 1-0 | 59 | 1989 | Trofeo Cristoforo Colombo | C15 French, Winawer |
| 37. M Grassi vs J Bellon Lopez |
| 0-1 | 33 | 1989 | Trofeo Cristoforo Colombo | A13 English |
| 38. Z Klaric vs M Grassi |
| 1-0 | 37 | 1989 | Trofeo Cristoforo Colombo | A40 Queen's Pawn Game |
| 39. M Grassi vs V Raicevic |
| 0-1 | 27 | 1989 | Trofeo Cristoforo Colombo | E21 Nimzo-Indian, Three Knights |
| 40. N Krogius vs M Grassi |
| 1-0 | 34 | 1989 | Trofeo Cristoforo Colombo | A07 King's Indian Attack |
| 41. M Grassi vs P Cramling |
| 0-1 | 31 | 1989 | Trofeo Cristoforo Colombo | A04 Reti Opening |
| 42. M Grassi vs D Werner |
| 0-1 | 38 | 1990 | Forli Open | E94 King's Indian, Orthodox |
| 43. P Votruba vs M Grassi |
| 1-0 | 41 | 1990 | Forli Open | A54 Old Indian, Ukrainian Variation, 4.Nf3 |
| 44. E Pozzi vs M Grassi |
| 1-0 | 32 | 1990 | Forli Open | C01 French, Exchange |
| 45. M Grassi vs E Eletsky |
| ½-½ | 23 | 1990 | Forli Open | A04 Reti Opening |
| 46. N Tagnon vs M Grassi |
| 0-1 | 27 | 1990 | Forli Open | C03 French, Tarrasch |
| 47. H Stelzer vs M Grassi |
| 1-0 | 56 | 1990 | Forli Open | A41 Queen's Pawn Game (with ...d6) |
| 48. M Grassi vs S Lagrotteria |
| 1-0 | 38 | 1990 | Forli Open | A04 Reti Opening |
| 49. M Grassi vs A Magalotti |
| 1-0 | 54 | 1990 | Forli Open | A04 Reti Opening |
| 50. V Kovacevic vs M Grassi |
| 1-0 | 68 | 1993 | EUCup Gr5Balatonbereny ;CBM 38 | D02 Queen's Pawn Game |
Kibitzing
