| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. S Weeramantry vs L Day |
| ½-½ | 46 | 1977 | 5th World Open | B23 Sicilian, Closed |
| 2. S Weeramantry vs R Jamieson |
| 0-1 | 39 | 1978 | Buenos Aires Olympiad | B23 Sicilian, Closed |
| 3. S Weeramantry vs K Dolgitser |
| 1-0 | 35 | 1984 | Nassau Chess Club International | B23 Sicilian, Closed |
| 4. S Weeramantry vs I Ivanov |
| 0-1 | 40 | 1990 | 91st US Open | B23 Sicilian, Closed |
| 5. S Weeramantry vs J C Urbaneja Navarro |
| ½-½ | 35 | 1991 | New York Open | B23 Sicilian, Closed |
| 6. S Weeramantry vs M Goldberg |
 | 1-0 | 23 | 1991 | New York Open | B23 Sicilian, Closed |
| 7. S Weeramantry vs A Littke |
| 1-0 | 56 | 1992 | 93rd US Open | B23 Sicilian, Closed |
| 8. S Weeramantry vs G Simms |
| 1-0 | 18 | 1994 | 95th US Open | B23 Sicilian, Closed |
| 9. S Weeramantry vs Razuvaev |
| 0-1 | 40 | 1994 | New York Open | B23 Sicilian, Closed |
| 10. S Weeramantry vs Gulko |
| 0-1 | 33 | 1994 | 22nd World Open | B23 Sicilian, Closed |
| 11. S Weeramantry vs M Voloaca |
| 0-1 | 40 | 1999 | North Bay Open | B23 Sicilian, Closed |
| 12. S Weeramantry vs F Pushkedra |
| 0-1 | 36 | 1999 | North Bay Open | B23 Sicilian, Closed |
| 13. S Weeramantry vs G Braylovsky |
| 0-1 | 66 | 2001 | 29th World Open | B23 Sicilian, Closed |
| 14. S Weeramantry vs W Paschall |
| 0-1 | 26 | 2001 | 29th World Open | B23 Sicilian, Closed |
| 15. S Weeramantry vs J Troyan |
| 1-0 | 15 | 2001 | New York State Championship | B23 Sicilian, Closed |
| 16. S Weeramantry vs V Ilinsky |
| ½-½ | 41 | 2004 | Calvia Olympiad | B23 Sicilian, Closed |
| 17. S Weeramantry vs S Krylov |
| 1-0 | 53 | 2004 | Calvia Olympiad | B23 Sicilian, Closed |
| 18. S Weeramantry vs W Teerapabpaisit |
| 1-0 | 44 | 2004 | Calvia Olympiad | B23 Sicilian, Closed |
| 19. S Weeramantry vs A Slimani |
| 1-0 | 26 | 2005 | Gibraltar Masters | B23 Sicilian, Closed |
| 20. S Weeramantry vs A Bryn |
| 1-0 | 40 | 2005 | Gibraltar Masters | B23 Sicilian, Closed |
| 21. S Weeramantry vs J G Nicholson |
| 1-0 | 24 | 2005 | Gibraltar Masters | B23 Sicilian, Closed |
| 22. S Weeramantry vs C Vinas Guerrero |
| ½-½ | 30 | 2005 | Gibraltar Masters | B23 Sicilian, Closed |
| 23. S Weeramantry vs A J Atia |
| 0-1 | 47 | 2006 | Turin Olympiad | B23 Sicilian, Closed |
| 24. S Weeramantry vs E Campos |
| 0-1 | 29 | 2006 | Turin Olympiad | B23 Sicilian, Closed |
| 25. S Weeramantry vs M Young |
| 1-0 | 16 | 2010 | Gibraltar Masters | B23 Sicilian, Closed |
Kibitzing
