| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. S Dhar vs Sundararajan |
| ½-½ | 62 |
2000 |
Goodricke Open | C84 Ruy Lopez, Closed |
| 2. V Rajlich vs Sundararajan |
| ½-½ | 63 |
2001 |
VI Cup GM | C80 Ruy Lopez, Open |
| 3. D Breder vs Sundararajan |
| ½-½ | 57 |
2001 |
FSGM August | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 4. Ni Hua vs Sundararajan |
| 1-0 | 57 |
2002 |
41st World Junior Championships | C91 Ruy Lopez, Closed |
| 5. D Mastrovasilis vs Sundararajan |
| 1-0 | 48 |
2002 |
41st World Junior Championships | C68 Ruy Lopez, Exchange |
| 6. S Prathamesh vs Sundararajan |
| 0-1 | 38 |
2003 |
Indian Championships | C80 Ruy Lopez, Open |
| 7. R Shetty vs Sundararajan |
 | ½-½ | 33 |
2004 |
Piloo Mody Open | C65 Ruy Lopez, Berlin Defense |
| 8. S Megaranto vs Sundararajan |
| 1-0 | 70 |
2005 |
Asian Chess Championship | C67 Ruy Lopez |
| 9. Ramesh vs Sundararajan |
| ½-½ | 79 |
2006 |
43rd Indian Championship | C67 Ruy Lopez |
| 10. C Deepan vs Sundararajan |
| 1-0 | 43 |
2006 |
43rd Indian Championship | C80 Ruy Lopez, Open |
| 11. P Girinath vs Sundararajan |
| 0-1 | 45 |
2006 |
43rd Indian Championship | C77 Ruy Lopez |
| 12. G Quillan vs Sundararajan |
| ½-½ | 73 |
2006 |
Gibtelecom Chess Festival | C80 Ruy Lopez, Open |
| 13. C Sandipan vs Sundararajan |
| ½-½ | 49 |
2006 |
43rd Indian Championship | C67 Ruy Lopez |
| 14. A Ashton vs Sundararajan |
| 0-1 | 23 |
2006 |
Gibtelecom Chess Festival | C80 Ruy Lopez, Open |
| 15. S Soumya vs Sundararajan |
| ½-½ | 46 |
2008 |
Commonwealth Championship | C80 Ruy Lopez, Open |
