| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. R Costantini vs E Arlandi |
| 0-1 | 38 | 2001 | Italian Championship | B80 Sicilian, Scheveningen |
| 27. S Sarno vs R Costantini |
| 1-0 | 62 | 2001 | Italian Championship | A37 English, Symmetrical |
| 28. R Costantini vs S Tatai |
| 1-0 | 40 | 2001 | Italian Championship | B90 Sicilian, Najdorf |
| 29. F Bellia vs R Costantini |
| ½-½ | 49 | 2001 | Italian Championship | B92 Sicilian, Najdorf, Opocensky Variation |
| 30. R Costantini vs D Vismara |
| 0-1 | 42 | 2001 | Italian Championship | B90 Sicilian, Najdorf |
| 31. B Belotti vs R Costantini |
| ½-½ | 18 | 2001 | Italian Championship | D37 Queen's Gambit Declined |
| 32. R Costantini vs F Scafarelli |
| 0-1 | 51 | 2001 | Italian Championship | B29 Sicilian, Nimzovich-Rubinstein |
| 33. R Mantovani vs R Costantini |
| 0-1 | 43 | 2001 | Italian Championship | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 34. R Costantini vs P Vezzosi |
 | 1-0 | 30 | 2001 | Italian Championship | B18 Caro-Kann, Classical |
| 35. M Lanzani vs R Costantini |
| 0-1 | 58 | 2001 | Italian Championship | B92 Sicilian, Najdorf, Opocensky Variation |
| 36. M Sciortino vs R Costantini |
| 0-1 | 65 | 2002 | Torneo B | D03 Torre Attack (Tartakower Variation) |
| 37. R Costantini vs M Mrdja |
| 1-0 | 32 | 2002 | Torneo B | C41 Philidor Defense |
| 38. P Passerotti vs R Costantini |
| ½-½ | 49 | 2002 | Torneo B | A57 Benko Gambit |
| 39. J Ivanov vs R Costantini |
| 1-0 | 25 | 2002 | Torneo B | D31 Queen's Gambit Declined |
| 40. R Costantini vs Naumkin |
| 0-1 | 43 | 2002 | Torneo B | C15 French, Winawer |
| 41. R Costantini vs M Sciortino |
| 1-0 | 41 | 2002 | Torneo B | B75 Sicilian, Dragon, Yugoslav Attack |
| 42. M Mrdja vs R Costantini |
| 1-0 | 59 | 2002 | Torneo B | B90 Sicilian, Najdorf |
| 43. R Costantini vs P Passerotti |
| 1-0 | 34 | 2002 | Torneo B | B90 Sicilian, Najdorf |
| 44. Naumkin vs R Costantini |
| ½-½ | 13 | 2002 | Torneo B | C97 Ruy Lopez, Closed, Chigorin |
| 45. R Costantini vs M Godena |
| 1-0 | 38 | 2003 | Verona op 9th | C53 Giuoco Piano |
| 46. A Rombaldoni vs R Costantini |
| 1-0 | 22 | 2010 | 42nd Italian Team Championship | B50 Sicilian |
| 47. R Costantini vs N Napoli |
| ½-½ | 10 | 2010 | 42nd Italian Team Championship | C00 French Defense |
| 48. R Costantini vs D Livecchi |
| 1-0 | 24 | 2012 | Italian Team Championship | C77 Ruy Lopez |
| 49. R Costantini vs M Malloni |
| 0-1 | 7 | 2012 | Italian Team Championship | C65 Ruy Lopez, Berlin Defense |
| 50. Efimov vs R Costantini |
| ½-½ | 19 | 2012 | Italian Team Championship | D12 Queen's Gambit Declined Slav |
Kibitzing
