| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. V Luciani vs R Costantini |
| 1-0 | 90 |
1999 |
Saint Vincent Open | B26 Sicilian, Closed, 6.Be3 |
| 2. I Naumkin vs R Costantini |
| 1-0 | 28 |
1999 |
Saint Vincent Open | A58 Benko Gambit |
| 3. M Lazic vs R Costantini |
| 1-0 | 29 |
2001 |
open | A04 Reti Opening |
| 4. M Senff vs R Costantini |
| 0-1 | 40 |
2001 |
MTO | B90 Sicilian, Najdorf |
| 5. S Sarno vs R Costantini |
| 1-0 | 62 |
2001 |
ch-ITA | A37 English, Symmetrical |
| 6. M Cebalo vs R Costantini |
| 1-0 | 42 |
2001 |
9th Aosta Valley | E06 Catalan, Closed, 5.Nf3 |
| 7. R Costantini vs A Opacic |
| 1-0 | 40 |
2001 |
open | B06 Robatsch |
| 8. P Ponkratov vs R Costantini |
| 1-0 | 39 |
2001 |
MTO | B90 Sicilian, Najdorf |
| 9. B Belotti vs R Costantini |
| ½-½ | 18 |
2001 |
ch-ITA | D37 Queen's Gambit Declined |
| 10. R Costantini vs I Naumkin |
| ½-½ | 39 |
2001 |
open | C80 Ruy Lopez, Open |
| 11. R Musalov vs R Costantini |
| 1-0 | 26 |
2001 |
MTO | B22 Sicilian, Alapin |
| 12. R Costantini vs E Arlandi |
| 0-1 | 38 |
2001 |
ch-ITA | B80 Sicilian, Scheveningen |
| 13. M Lanzani vs R Costantini |
| 0-1 | 58 |
2001 |
ch-ITA | B92 Sicilian, Najdorf, Opocensky Variation |
| 14. D Tomasi vs R Costantini |
| ½-½ | 41 |
2001 |
open | B21 Sicilian, 2.f4 and 2.d4 |
| 15. R Costantini vs A Raetsky |
| 0-1 | 63 |
2001 |
MTO | C42 Petrov Defense |
| 16. R Costantini vs D Vismara |
| 0-1 | 42 |
2001 |
ch-ITA | B90 Sicilian, Najdorf |
| 17. F Rivola vs R Costantini |
| 0-1 | 26 |
2001 |
open | A46 Queen's Pawn Game |
| 18. R Costantini vs H Eschle |
| 1-0 | 34 |
2001 |
MTO | B80 Sicilian, Scheveningen |
| 19. A Thaler vs R Costantini |
| 0-1 | 25 |
2001 |
MTO | D37 Queen's Gambit Declined |
| 20. R Costantini vs P Vezzosi |
 | 1-0 | 30 |
2001 |
ch-ITA | B18 Caro-Kann, Classical |
| 21. D Mayers vs R Costantini |
| 0-1 | 40 |
2001 |
open | B22 Sicilian, Alapin |
| 22. M Kobalia vs R Costantini |
| 1-0 | 35 |
2001 |
MTO | B90 Sicilian, Najdorf |
| 23. F Bellia vs R Costantini |
| ½-½ | 49 |
2001 |
ch-ITA | B92 Sicilian, Najdorf, Opocensky Variation |
| 24. E Formanek vs R Costantini |
 | 1-0 | 23 |
2001 |
open | A32 English, Symmetrical Variation |
| 25. A Allemann vs R Costantini |
| 1-0 | 38 |
2001 |
MTO | A57 Benko Gambit |