| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. S Bernstein vs Weeramantry |
 | 1-0 | 55 |
1987 |
NY State Championship | E62 King's Indian, Fianchetto |
| 2. D Gurevich vs Weeramantry |
| 1-0 | 55 |
1988 |
Boston USA op | E99 King's Indian, Orthodox, Taimanov |
| 3. Dzindzichashvili vs Weeramantry |
| 1-0 | 47 |
1991 |
It (open) | B08 Pirc, Classical |
| 4. Ashley vs Weeramantry |
| 1-0 | 30 |
1991 |
07, New York op 23 | B06 Robatsch |
| 5. Weeramantry vs M Goldberg |
| 1-0 | 23 |
1991 |
New York | B23 Sicilian, Closed |
| 6. P Moulin vs Weeramantry |
| 1-0 | 39 |
1992 |
Somerset op | B06 Robatsch |
| 7. Weeramantry vs E Schiller |
| 1-0 | 41 |
1994 |
US Open | B07 Pirc |
| 8. Shaked vs Weeramantry |
| 1-0 | 29 |
1994 |
New York op | B06 Robatsch |
| 9. DeFirmian vs Weeramantry |
| 1-0 | 35 |
1995 |
It (open) | B06 Robatsch |
| 10. A Stefanova vs Weeramantry |
| 1-0 | 24 |
1997 |
4th op Waikiki | B08 Pirc, Classical |
| 11. Blatny vs Weeramantry |
| 1-0 | 39 |
1997 |
Hawaii | E62 King's Indian, Fianchetto |
| 12. Weeramantry vs A Caoili |
| 1-0 | 24 |
1998 |
Saitek US Masters | C44 King's Pawn Game |
| 13. Rozentalis vs Weeramantry |
| 1-0 | 30 |
1999 |
U.S. Open | B08 Pirc, Classical |
| 14. Miles vs Weeramantry |
| 1-0 | 26 |
1999 |
U.S. Open (5) | E97 King's Indian |
| 15. Weeramantry vs P Manning |
| 1-0 | 13 |
2000 |
World Open | B13 Caro-Kann, Exchange |
| 16. Patrick Yee vs Weeramantry |
| 1-0 | 38 |
2000 |
World Open | B06 Robatsch |
| 17. M Dougherty vs Weeramantry |
| 1-0 | 31 |
2000 |
World Open | E92 King's Indian |
| 18. Weeramantry vs V Pupols |
| 1-0 | 69 |
2001 |
ch-New York State | C11 French |
| 19. Weeramantry vs J Troyan |
| 1-0 | 15 |
2001 |
ch-New York State | B23 Sicilian, Closed |
| 20. Fedorowicz vs Weeramantry |
| 1-0 | 28 |
2001 |
US Open | E62 King's Indian, Fianchetto |
| 21. Y Shulman vs Weeramantry |
| 1-0 | 37 |
2001 |
Roman Levit Mem | E92 King's Indian |
| 22. J Fernandez vs Weeramantry |
| 1-0 | 60 |
2001 |
29th World Open | B07 Pirc |
| 23. J Benjamin vs Weeramantry |
| 1-0 | 36 |
2001 |
ch-New York State | B08 Pirc, Classical |
| 24. Weeramantry vs K Bradshaw |
| 1-0 | 17 |
2002 |
open | C41 Philidor Defense |
| 25. A Ivanov vs Weeramantry |
| 1-0 | 19 |
2003 |
World Open: Open Section | B07 Pirc |
