| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. B Rzayev vs P Karthikeyan |
| ½-½ | 17 |
2008 |
World Junior Championship | C42 Petrov Defense |
| 2. P Karthikeyan vs Inani Darpan |
| 1-0 | 37 |
2008 |
Commonwealth Championship | E38 Nimzo-Indian, Classical, 4...c5 |
| 3. Negi vs P Karthikeyan |
| 1-0 | 31 |
2008 |
Commonwealth Championship | B65 Sicilian, Richter-Rauzer Attack, 7...Be7 Defense, 9...Nxd4 |
| 4. F Guilleux vs P Karthikeyan |
| 0-1 | 41 |
2008 |
Open 18-wycc | D44 Queen's Gambit Declined Semi-Slav |
| 5. P Karthikeyan vs D Swiercz |
| 1-0 | 44 |
2008 |
World Junior Championship | A40 Queen's Pawn Game |
| 6. S Phadke vs P Karthikeyan |
| 0-1 | 34 |
2008 |
Commonwealth Championship | C53 Giuoco Piano |
| 7. R G Teixeira vs P Karthikeyan |
| 0-1 | 41 |
2008 |
Open 18-wycc | C75 Ruy Lopez, Modern Steinitz Defense |
| 8. P Karthikeyan vs P Vavric |
| 1-0 | 54 |
2008 |
World Junior Championship | E85 King's Indian, Samisch, Orthodox Variation |
| 9. S Sjugirov vs P Karthikeyan |
| 1-0 | 72 |
2008 |
World Junior Championship | C42 Petrov Defense |
| 10. J Venkata Ramana vs P Karthikeyan |
| 0-1 | 48 |
2008 |
Commonwealth Championship | A00 Uncommon Opening |
| 11. P Karthikeyan vs Manh Tien Tran |
| ½-½ | 58 |
2008 |
Open 18-wycc | E15 Queen's Indian |
| 12. G N Gopal vs P Karthikeyan |
 | ½-½ | 18 |
2008 |
World Junior Championship | C43 Petrov, Modern Attack |
| 13. P Karthikeyan vs A Gupta |
| ½-½ | 66 |
2008 |
Commonwealth Championship | D73 Neo-Grunfeld, 5.Nf3 |
| 14. P Karthikeyan vs Qun Ma |
| ½-½ | 43 |
2008 |
Open 18-wycc | D18 Queen's Gambit Declined Slav, Dutch |
| 15. D Andreikin vs P Karthikeyan |
| 1-0 | 27 |
2008 |
World Junior Championship | A14 English |
| 16. P Karthikeyan vs M Ragger |
 | 1-0 | 24 |
2008 |
World Junior Championship | D45 Queen's Gambit Declined Semi-Slav |
| 17. P Karthikeyan vs S Arun Prasad |
| 0-1 | 36 |
2008 |
Commonwealth Championship | D45 Queen's Gambit Declined Semi-Slav |
| 18. I Chirila vs P Karthikeyan |
| 1-0 | 43 |
2008 |
Open 18-wycc | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 19. A Salihovic vs P Karthikeyan |
| 0-1 | 34 |
2008 |
World Junior Championship | A46 Queen's Pawn Game |
| 20. P Karthikeyan vs U Anwesh |
| 1-0 | 34 |
2008 |
Commonwealth Championship | A14 English |
| 21. Dang The Nam vs P Karthikeyan |
| 0-1 | 37 |
2008 |
Open 18-wycc | C53 Giuoco Piano |
| 22. P Karthikeyan vs S Ilic |
| 1-0 | 28 |
2008 |
World Junior Championship | D45 Queen's Gambit Declined Semi-Slav |
| 23. A Aitbayev vs P Karthikeyan |
| 0-1 | 60 |
2008 |
Open 18-wycc | C60 Ruy Lopez |
| 24. I Popov vs P Karthikeyan |
| ½-½ | 25 |
2008 |
World Junior Championship | C43 Petrov, Modern Attack |
| 25. Deepan Chakkravarthy J vs P Karthikeyan |
| ½-½ | 87 |
2008 |
Commonwealth Championship | D47 Queen's Gambit Declined Semi-Slav |