| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Weeramantry vs O Sarapu |
| 0-1 | 40 |
1978 |
? | C44 King's Pawn Game |
| 2. S Bernstein vs Weeramantry |
 | 1-0 | 55 |
1987 |
NY State Championship | E62 King's Indian, Fianchetto |
| 3. D Gurevich vs Weeramantry |
| 1-0 | 55 |
1988 |
Boston USA op | E99 King's Indian, Orthodox, Taimanov |
| 4. Weeramantry vs Igor Ivanov |
| 0-1 | 40 |
1990 |
It (open) | B23 Sicilian, Closed |
| 5. Weeramantry vs M Khatena |
| 0-1 | 47 |
1990 |
USA op | B02 Alekhine's Defense |
| 6. Ashley vs Weeramantry |
| 1-0 | 30 |
1991 |
07, New York op 23 | B06 Robatsch |
| 7. Weeramantry vs Alburt |
| 0-1 | 18 |
1991 |
It (open) | B02 Alekhine's Defense |
| 8. Dzindzichashvili vs Weeramantry |
| 1-0 | 47 |
1991 |
It (open) | B08 Pirc, Classical |
| 9. P Moulin vs Weeramantry |
| 1-0 | 39 |
1992 |
Somerset op | B06 Robatsch |
| 10. Weeramantry vs Shabalov |
| 0-1 | 55 |
1993 |
Philadelphia | B02 Alekhine's Defense |
| 11. Shaked vs Weeramantry |
| 1-0 | 29 |
1994 |
New York op | B06 Robatsch |
| 12. Weeramantry vs Gulko |
| 0-1 | 33 |
1994 |
USA | B23 Sicilian, Closed |
| 13. Weeramantry vs Razuvaev |
| 0-1 | 40 |
1994 |
New York op | B23 Sicilian, Closed |
| 14. DeFirmian vs Weeramantry |
| 1-0 | 35 |
1995 |
It (open) | B06 Robatsch |
| 15. Blatny vs Weeramantry |
| 1-0 | 39 |
1997 |
Hawaii | E62 King's Indian, Fianchetto |
| 16. A Stefanova vs Weeramantry |
| 1-0 | 24 |
1997 |
4th op Waikiki | B08 Pirc, Classical |
| 17. Miles vs Weeramantry |
| 1-0 | 26 |
1999 |
U.S. Open (5) | E97 King's Indian |
| 18. Rozentalis vs Weeramantry |
| 1-0 | 30 |
1999 |
U.S. Open | B08 Pirc, Classical |
| 19. M Dougherty vs Weeramantry |
| 1-0 | 31 |
2000 |
World Open | E92 King's Indian |
| 20. Patrick Yee vs Weeramantry |
| 1-0 | 38 |
2000 |
World Open | B06 Robatsch |
| 21. Y Shulman vs Weeramantry |
| 1-0 | 37 |
2001 |
Roman Levit Mem | E92 King's Indian |
| 22. Weeramantry vs G Braylovsky |
| 0-1 | 66 |
2001 |
29th World Open | B23 Sicilian, Closed |
| 23. J Benjamin vs Weeramantry |
| 1-0 | 36 |
2001 |
ch-New York State | B08 Pirc, Classical |
| 24. Fedorowicz vs Weeramantry |
| 1-0 | 28 |
2001 |
US Open | E62 King's Indian, Fianchetto |
| 25. Weeramantry vs Paschall |
| 0-1 | 26 |
2001 |
29th World Open | B23 Sicilian, Closed |
