| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Harris vs Weeramantry |
 | 0-1 | 23 |
1972 |
London | B09 Pirc, Austrian Attack |
| 2. Hill DM vs Weeramantry |
| 0-1 | 28 |
1972 |
Barnstaple op | E92 King's Indian |
| 3. Barnett vs Weeramantry |
| 0-1 | 31 |
1986 |
Estes Park | E92 King's Indian |
| 4. K Shirazi vs Weeramantry |
| 0-1 | 42 |
1988 |
Continental | B09 Pirc, Austrian Attack |
| 5. M Lamon vs Weeramantry |
| 0-1 | 25 |
1990 |
Jacksonville | B06 Robatsch |
| 6. Weeramantry vs M Goldberg |
| 1-0 | 23 |
1991 |
New York | B23 Sicilian, Closed |
| 7. L Pugh vs Weeramantry |
| 0-1 | 31 |
1992 |
Blitz:15' | E62 King's Indian, Fianchetto |
| 8. Weeramantry vs E Schiller |
| 1-0 | 41 |
1994 |
US Open | B07 Pirc |
| 9. Ashley vs Weeramantry |
| 0-1 | 43 |
1998 |
It, Philadelphia (USA) | B06 Robatsch |
| 10. Weeramantry vs A Caoili |
| 1-0 | 24 |
1998 |
Saitek US Masters | C44 King's Pawn Game |
| 11. Weeramantry vs P Manning |
| 1-0 | 13 |
2000 |
World Open | B13 Caro-Kann, Exchange |
| 12. Weeramantry vs V Pupols |
| 1-0 | 69 |
2001 |
ch-New York State | C11 French |
| 13. Weeramantry vs J Troyan |
| 1-0 | 15 |
2001 |
ch-New York State | B23 Sicilian, Closed |
| 14. Weeramantry vs K Bradshaw |
| 1-0 | 17 |
2002 |
open | C41 Philidor Defense |
| 15. Weeramantry vs E Ciuca |
| 1-0 | 16 |
2003 |
World Open: Open Section | C44 King's Pawn Game |
| 16. J Kelleher vs Weeramantry |
| 0-1 | 30 |
2003 |
World Open: Open Section | B08 Pirc, Classical |
| 17. Weeramantry vs W Theerapabpaisit |
| 1-0 | 44 |
2004 |
36th Olympiad | B23 Sicilian, Closed |
| 18. Weeramantry vs S Krylov |
| 1-0 | 53 |
2004 |
36th Olympiad | B23 Sicilian, Closed |
| 19. Weeramantry vs Manoj Kumar |
| 1-0 | 26 |
2004 |
36th Olympiad | C53 Giuoco Piano |
| 20. S Ayyoubi vs Weeramantry |
| 0-1 | 46 |
2004 |
36th Olympiad | B30 Sicilian |
| 21. S Bergsson vs Weeramantry |
| 0-1 | 39 |
2005 |
Gibraltar Masters | E71 King's Indian, Makagonov System (5.h3) |
| 22. Weeramantry vs J G Nicholson |
| 1-0 | 24 |
2005 |
Gibraltar Masters | B23 Sicilian, Closed |
| 23. Weeramantry vs A Bryn |
| 1-0 | 40 |
2005 |
Gibraltar Masters | B23 Sicilian, Closed |
| 24. Weeramantry vs A Slimani |
| 1-0 | 26 |
2005 |
Gibraltar Masters | B23 Sicilian, Closed |
| 25. Weeramantry vs J Pamatmat |
| 1-0 | 18 |
2009 |
Foxwoods Open | C13 French |
