| Jun 20, 2026 | Madaminov | 1–0 | Karthik Rajaa | Round 11: Madaminov, Mukhiddin - Karthik Rajaa | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jun 20, 2026 | Karthik Rajaa | 1–0 | Zhang | Round 10: Karthik Rajaa - Zhang, Rui | Queen's Pawn Game: Colle System | |
| Jun 20, 2026 | Mendonca | 1–0 | Karthik Rajaa | Round 9: Mendonca, Leon Luke - Karthik Rajaa | Yusupov-Rubinstein System | |
| Jun 20, 2026 | Karthik Rajaa | 1–0 | Lou | Round 8: Karthik Rajaa - Lou, Yiping | Queen's Gambit Declined: Barmen Variation | |
| Jun 20, 2026 | Murzin | 1–0 | Karthik Rajaa | Round 7: Murzin, Volodar - Karthik Rajaa | King's Indian Attack: Symmetrical Defense | |
| Jun 20, 2026 | Karthik Rajaa | 0–1 | Tekeyev | Round 6: Karthik Rajaa - Tekeyev, Zaur | Zukertort Opening: Nimzo-Larsen Variation | |
| Jun 20, 2026 | Karthik Rajaa | 1–0 | Nomindalai Tumurbaatar | Round 5: Karthik Rajaa - Nomindalai Tumurbaatar | Zukertort Opening: Sicilian Invitation | |
| Jun 20, 2026 | Kavin Mohan | 0–1 | Karthik Rajaa | Round 4: Kavin Mohan - Karthik Rajaa | English Opening: Symmetrical Variation, Four Knights Variation | |
| Jun 20, 2026 | Karthik Rajaa | 0–1 | Hong | Round 3: Karthik Rajaa - Hong, Andrew | Anderssen's Opening | |
| Jun 20, 2026 | Shuvalova | ½–½ | Karthik Rajaa | Round 2: Shuvalova, Polina - Karthik Rajaa | French Defense: Tarrasch Variation, Open System, Main Line | |
| Jun 20, 2026 | Karthik Rajaa | 1–0 | Escobar Medina | Round 1: Karthik Rajaa - Escobar Medina, Andres F | Modern Defense: Pseudo-Austrian Attack | |
| Jun 19, 2026 | Li | ½–½ | Karthik Rajaa | Round 12: Li, Yiheng - Karthik Rajaa | Sicilian Defense: Richter-Rauzer Variation, Modern Variation | |
| Jun 19, 2026 | Karthik Rajaa | 1–0 | Oberio | Round 11: Karthik Rajaa - Oberio, Aglipay | Scandinavian Defense: Gubinsky-Melts Defense | |
| Jun 19, 2026 | Peng | ½–½ | Karthik Rajaa | Round 10: Peng, Xiongjian - Karthik Rajaa | French Defense: Advance Variation, Euwe Variation | |
| Jun 19, 2026 | Karthik Rajaa | 1–0 | Yang | Round 9: Karthik Rajaa - Yang, Yijing | French Defense: Chigorin Variation | |
| Jun 18, 2026 | Hong | ½–½ | Karthik Rajaa | Round 8: Hong, Xing - Karthik Rajaa | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Jun 18, 2026 | Karthik Rajaa | 0–1 | Arakhamia-Grant | Round 7: Karthik Rajaa - Arakhamia-Grant, Ketevan | King's Indian Attack: Symmetrical Defense | |
| Jun 18, 2026 | Itgelt | ½–½ | Karthik Rajaa | Round 6: Itgelt, Khuyagtsogt - Karthik Rajaa | Queen's Indian Defense: Kasparov-Petrosian Variation, Petrosian Attack | |
| Jun 18, 2026 | Karthik Rajaa | 1–0 | Bottazzi | Round 5: Karthik Rajaa - Bottazzi, Ulysse | King's Indian Attack: Symmetrical Defense | |
| Jun 17, 2026 | Richards | 0–1 | Karthik Rajaa | Round 4: Richards, Heather S - Karthik Rajaa | Pirc Defense | |
| Jun 17, 2026 | Karthik Rajaa | 0–1 | Casiguran | Round 3: Karthik Rajaa - Casiguran, Phil Martin | ? | |
| Jun 17, 2026 | Zhai | ½–½ | Karthik Rajaa | Round 2: Zhai, Mo - Karthik Rajaa | French Defense: Classical Variation, Burn Variation | |
| Jun 17, 2026 | Chen | 1–0 | Karthik Rajaa | Round 1: Chen, Qi b - Karthik Rajaa | French Defense: Chigorin Variation | |
| May 29, 2026 | Karthik Rajaa | ½–½ | Fedorov | Round 9: Karthik Rajaa - Fedorov, Alexei | King's Indian Defense: Fianchetto Variation, Carlsbad Variation | |
| May 25, 2026 | Rakhmatullaev | 1–0 | Karthik Rajaa | Round 4: Rakhmatullaev, Almas - Karthik Rajaa | French Defense: Schlechter Variation | |
| Dec 31, 2025 | Karthik Rajaa | 1–0 | Arfan | 10th Johor International Chess Open 2025 | King's Indian Defense | |
| Dec 30, 2025 | Karthik Rajaa | 0–1 | Priasmoro | Round 8: Karthik Rajaa - Priasmoro, Novendra | King's Indian Attack: Symmetrical Defense | |
| Dec 30, 2025 | Dziththauly Ramadhan | 0–1 | Karthik Rajaa | Round 7: Dziththauly Ramadhan - Karthik Rajaa | Lion Defense: Lion's Jaw | |
| Dec 29, 2025 | Karthik Rajaa | 1–0 | Shahar | Round 6: Karthik Rajaa - Shahar, Uzair | King's Indian Defense: Fianchetto Variation, Classical Variation | |
| Dec 29, 2025 | Karthik Rajaa | ½–½ | Ang | Round 4: Karthik Rajaa - Ang, Ern Jie Anderson | Zukertort Opening: Nimzo-Larsen Variation | |
| Dec 23, 2025 | Nguyen | 0–1 | Karthik Rajaa | Round 9: Nguyen, Duc Hoa - Karthik Rajaa | Zukertort Opening | |
| Dec 21, 2025 | Karthik Rajaa | 0–1 | Peng | Round 6: Karthik Rajaa - Peng, Hongchi | English Opening: King's English Variation | |
| Sep 21, 2025 | Salimova | * | Karthik Rajaa | 20th Dato Arthur Tan Malaysian Open Chess Championship | ? | |
| Sep 20, 2025 | Karthik Rajaa | * | Imomkuzieva | 20th Dato Arthur Tan Malaysian Open Chess Championship | ? | |
| Sep 20, 2025 | Karthik Rajaa | * | Jin | 20th Dato Arthur Tan Malaysian Open Chess Championship | ? | |
| Sep 19, 2025 | Velarde | * | Karthik Rajaa | 20th Dato Arthur Tan Malaysian Open Chess Championship | King's Indian Defense: Normal Variation, Rare Defenses | |
| Sep 18, 2025 | Karthik Rajaa | 0–1 | Laxman | 20th Dato Arthur Tan Malaysian Open Chess Championship | Nimzo-Indian Defense: Rubinstein System | |
| Sep 17, 2025 | Sreekarthika Velmurugan | * | Karthik Rajaa | 20th Dato Arthur Tan Malaysian Open Chess Championship | ? | |
| Sep 16, 2025 | Karthik Rajaa | 0–1 | Paglinawan | Dato Tan Chin Nam Malaysia Day Age Group - Open | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Sep 16, 2025 | Chen | 0–1 | Karthik Rajaa | Dato Tan Chin Nam Malaysia Day Age Group - Open | Zukertort Opening | |
| Sep 16, 2025 | Karthik Rajaa | 1–0 | Xie | Dato Tan Chin Nam Malaysia Day Age Group - Open | English Opening: Anglo-Indian Defense, Queen's Indian Formation | |
| Sep 16, 2025 | Karthik Rajaa | * | Mendoza | 20th Dato Arthur Tan Malaysian Open Chess Championship | ? | |
| Sep 15, 2025 | Karthik Rajaa | * | Liu | 20th Dato Arthur Tan Malaysian Open Chess Championship | ? | |
| Apr 23, 2025 | Karthik Rajaa | 0–1 | Woodward | Round 2: Karthik Rajaa - Woodward, Andy | Queen's Gambit Declined: Exchange Variation, Sämisch Variation | |
| Aug 21, 2024 | Karthik Rajaa | ½–½ | Ojas Kulkarni | Round 6: Karthik Rajaa - Ojas Kulkarni | Benoni Defense | |
| Aug 20, 2024 | Galaktionov | 1–0 | Karthik Rajaa | Round 5: Galaktionov, Artem - Karthik Rajaa | Indian Defense: Anti-Nimzo-Indian | |
| Aug 19, 2024 | Karthik Rajaa | 0–1 | Salcedo | Round 4: Karthik Rajaa - Salcedo, Richilieu III | English Opening: Symmetrical Variation, Two Knights Variation | |
| Aug 18, 2024 | Sonis | 1–0 | Karthik Rajaa | Round 3: Sonis, Francesco - Karthik Rajaa | English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation | |
| Aug 16, 2024 | Karthik Rajaa | ½–½ | Amin | 30th AbuDhabi Masters Chess Tournament | Three Knights Opening | |
| Aug 15, 2024 | Aravindh | ½–½ | Karthik Rajaa | 30th AbuDhabi Masters Chess Tournament | Queen's Indian Defense: Petrosian Variation | |
| Aug 7, 2024 | Safarli | 1–0 | Karthik Rajaa | RTU Open - A | Caro-Kann Defense: Breyer Variation | |
| Jul 22, 2024 | Gupta | 1–0 | Karthik Rajaa | Round 3: Gupta, Abhijeet - Karthik Rajaa | Benoni Defense: Fianchetto Variation | |
| Jul 9, 2024 | Karthik Rajaa | ½–½ | Bartel | XLIII Open Villa de Benasque 2024 | Queen's Gambit Declined: Barmen Variation | |
| Jun 23, 2024 | Karthik Rajaa | 1–0 | Pranav K P | Round 9: Karthik Rajaa - Pranav K P | Nimzo-Indian Defense: Kmoch Variation | |
| Jun 22, 2024 | Riebel | 0–1 | Karthik Rajaa | Round 8: Riebel, Werner - Karthik Rajaa | Queen's Pawn Game: Modern Defense | |
| Jun 21, 2024 | Amar | 1–0 | Karthik Rajaa | Round 7: Amar, Elham - Karthik Rajaa | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| Jun 20, 2024 | Karthik Rajaa | ½–½ | Zwirs | Teplice 2024 | Queen's Pawn Game: Symmetrical Variation | |
| Jun 19, 2024 | Karthik Rajaa | ½–½ | Smirin | Round 5: Karthik Rajaa - Smirin, Ilia | Benko Gambit Accepted: Fully Accepted Variation | |
| Jun 18, 2024 | Mikhalevski | ½–½ | Karthik Rajaa | Round 4: Mikhalevski, Victor - Karthik Rajaa | Queen's Indian Defense: Classical Variation | |
| Jun 17, 2024 | Karthik Rajaa | ½–½ | Stocek | Round 3: Karthik Rajaa - Stocek, Jiri | Nimzo-Indian Defense: St. Petersburg Variation | |
| Mar 31, 2024 | Karthik Rajaa | ½–½ | Rohit S | 6th SHAASTRA Rapid FIDE Rated Chess Tournament 2024 - IIT Madras | Tarrasch Defense: Dubov Tarrasch | |
| Mar 30, 2024 | Karthik Rajaa | 1–0 | Ashva Shanmugam | 6th SHAASTRA Rapid FIDE Rated Chess Tournament 2024 - Chennai, India | English Opening: Neo-Catalan | |
| Mar 30, 2024 | Mrithyunjay Mahadevan | 1–0 | Karthik Rajaa | 6th SHAASTRA Rapid FIDE Rated Chess Tournament 2024 - Chennai, India | English Opening: Symmetrical Variation, Ultra-Symmetrical Variation | |
| Mar 30, 2024 | Saisarvesh S | ½–½ | Karthik Rajaa | 6th SHAASTRA Rapid FIDE Rated Chess Tournament 2024 - Chennai, India | ? | |
| Mar 30, 2024 | Ashwin Sairam | 0–1 | Karthik Rajaa | 6th SHAASTRA Rapid FIDE Rated Chess Tournament 2024 - Chennai, India | Rapport-Jobava System | |
| Jan 21, 2024 | Sitnikov | 0–1 | Karthik | 13th Tamil Nadu IM Norm Closed Circuit Chess Tournament | Sicilian Defense: Closed | |
| Jan 20, 2024 | Karthik | ½–½ | Sai | 13th Tamil Nadu IM Norm Closed Circuit Chess Tournament | King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Exchange Line | |
| Jan 20, 2024 | Haribalu | 0–1 | Karthik | 13th Tamil Nadu IM Norm Closed Circuit Chess Tournament | East Indian Defense | |
| Jan 19, 2024 | Karthik | 1–0 | Touzane | 13th Tamil Nadu IM Norm Closed Circuit Chess Tournament | English Opening: Symmetrical Variation, Ultra-Symmetrical Variation | |
| Jan 18, 2024 | Karthik | ½–½ | Sachi | 13th Tamil Nadu IM Norm Closed Circuit Chess Tournament | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Jan 18, 2024 | Ziatdinov | 0–1 | Karthik | 13th Tamil Nadu IM Norm Closed Circuit Chess Tournament | King's Indian Defense: Orthodox Variation, Positional Defense | |
| Jan 17, 2024 | Karthik | ½–½ | Khusenkhojaev | 13th Tamil Nadu IM Norm Closed Circuit Chess Tournament | English Opening: Mikenas-Carls Variation | |
| Jan 16, 2024 | Karthik | 1–0 | Prasannaa.S | 13th Tamil Nadu IM Norm Closed Circuit Chess Tournament | King's Indian Defense: Fianchetto Variation, Classical Variation | |
| Jan 16, 2024 | Manik | ½–½ | Karthik | 13th Tamil Nadu IM Norm Closed Circuit Chess Tournament | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Dec 22, 2023 | Gochelashvili | 1–0 | Karthik | 10th-IM-NORM-Sivakasi | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Dec 21, 2023 | Karthik | 1–0 | Surendran | 10th-IM-NORM-Sivakasi | Nimzo-Indian Defense: Normal Variation | |
| Dec 21, 2023 | Rosh | ½–½ | Karthik | 10th-IM-NORM-Sivakasi | French Defense: Classical Variation, Delayed Exchange Variation | |
| Dec 20, 2023 | Karthik | 0–1 | Fedorov | 10th-IM-NORM-Sivakasi | King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Rare Line | |
| Dec 19, 2023 | Karthik | 0–1 | Ziatdinov | 10th-IM-NORM-Sivakasi | Réti Opening: Advance Variation | |
| Dec 19, 2023 | Podolchenko | 1–0 | Karthik | 10th-IM-NORM-Sivakasi | King's Indian Defense: Orthodox Variation, Positional Defense | |
| Dec 18, 2023 | Karthik | 1–0 | Wagh | 10th-IM-NORM-Sivakasi | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6 | |
| Dec 17, 2023 | Karthik | 1–0 | Rohit | 10th-IM-NORM-Sivakasi | Nimzo-Indian Defense: Normal Variation | |
| Dec 17, 2023 | Abdyzhapar | 1–0 | Karthik | 10th-IM-NORM-Sivakasi | Rapport-Jobava System | |
| Dec 15, 2023 | Karthik | 1–0 | Balasubramaniam | 9th IM Norm closed circuit Chess Tournament | English Opening: Symmetrical Variation, Hedgehog Defense | |
| Dec 14, 2023 | Karthik | ½–½ | Rosh | 9th IM Norm closed circuit Chess Tournament | Queen's Pawn Game: London System | |
| Dec 14, 2023 | Abdyzhapar | 1–0 | Karthik | 9th IM Norm closed circuit Chess Tournament | Indian Defense: London System | |
| Dec 13, 2023 | Gochelashvili | ½–½ | Karthik | 9th IM Norm closed circuit Chess Tournament | Caro-Kann Defense: Exchange Variation | |
| Dec 12, 2023 | Karthik | 1–0 | Arjun | 9th IM Norm closed circuit Chess Tournament | Tarrasch Defense: Symmetrical Variation | |
| Dec 12, 2023 | Ziatdinov | ½–½ | Karthik | 9th IM Norm closed circuit Chess Tournament | Caro-Kann Defense: Tartakower Variation | |
| Dec 11, 2023 | Fedorov | ½–½ | Karthik | 9th IM Norm closed circuit Chess Tournament | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Dec 10, 2023 | Karthik | 1–0 | Akshit | 9th IM Norm closed circuit Chess Tournament | Zukertort Opening | |
| Dec 10, 2023 | Podolchenko | ½–½ | Karthik | 9th IM Norm closed circuit Chess Tournament | Nimzo-Indian Defense: Classical Variation, Noa Variation | |
| Oct 20, 2023 | Karthik Rajaa | 0–1 | Begmuratov | Qatar Masters | English Opening: Anglo-Indian Defense, Queen's Indian Formation | |
| Oct 19, 2023 | Ilamparthi A R | ½–½ | Karthik Rajaa | Qatar Masters | French Defense: King's Indian Attack | |
| Oct 18, 2023 | Karthik Rajaa | * | Rohith Krishna S | Qatar Masters | Indian Defense: London System | |
| Oct 17, 2023 | Rakhmatullaev | 1–0 | Karthik Rajaa | Qatar Masters | Sicilian Defense: Chekhover Variation | |
| Oct 15, 2023 | Krishna C R G | * | Karthik Rajaa | Qatar Masters | Queen's Indian Defense: Spassky System | |
| Oct 14, 2023 | Karthik Rajaa | 1–0 | Hari Madhavan N B | Qatar Masters | English Opening: Caro-Kann Defensive System | |
| Oct 13, 2023 | Mohammad Fahad | 1–0 | Karthik Rajaa | Qatar Masters | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Oct 12, 2023 | Karthik Rajaa | ½–½ | Song | Qatar Masters | Nimzo-Indian Defense | |