| Feb 14, 2026 | Vaidyanathan | 0–1 | Shahil Dey | Round 1: Vaidyanathan, Kannan - Shahil Dey | Nimzo-Indian Defense: Reshevsky Variation | |
| Dec 26, 2025 | Vaidyanathan | ½–½ | Prasannaa.s | Athens of the East 5th International Grandmaster Open Chess Tournament | Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense | |
| Dec 26, 2025 | Mridav M | 0–1 | Vaidyanathan | Athens of the East 5th International Grandmaster Open Chess Tournament | Sicilian Defense: Classical Variation, Anti-Sozin Variation | |
| Sep 17, 2025 | Vaidyanathan | 0–1 | Aashman Gupta | SixDays September 2025 Swiss norm edition | Semi-Slav Defense: Chigorin Defense | |
| Sep 16, 2025 | Defromont | ½–½ | Vaidyanathan | SixDays September 2025 Swiss norm edition | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Sep 16, 2025 | Vaidyanathan | 1–0 | Pavan Karthikeya Varma Gunturi | SixDays September 2025 Swiss norm edition | Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation | |
| Sep 15, 2025 | Lehocz | 1–0 | Vaidyanathan | SixDays September 2025 Swiss norm edition | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Sep 14, 2025 | Vaidyanathan | ½–½ | Geher | SixDays September 2025 Swiss norm edition | Nimzo-Indian Defense: St. Petersburg Variation, American Variation | |
| Sep 14, 2025 | Horvath | ½–½ | Vaidyanathan | SixDays September 2025 Swiss norm edition | English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation | |
| Sep 13, 2025 | Vaidyanathan | 0–1 | Papp | SixDays September 2025 Swiss norm edition | Nimzo-Indian Defense: St. Petersburg Variation, American Variation | |
| Sep 13, 2025 | Kolimar | ½–½ | Vaidyanathan | SixDays September 2025 Swiss norm edition | English Opening: King's English Variation | |
| Sep 12, 2025 | Vaidyanathan | ½–½ | Colbow | SixDays September 2025 Swiss norm edition | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jul 14, 2025 | Vaidyanathan | 0–1 | Milanovic | Round 1: Vaidyanathan, Kannan - Milanovic, Danilo | Old Indian Defense: Ukrainian Variation | |
| Jul 4, 2025 | Vignesh N R | 1–0 | Vaidyanathan | Round 1: Vignesh N R - Vaidyanathan, Kannan | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Jan 7, 2025 | Vaidyanathan | 0–1 | Sanket Chakravarty | 15th Chennai Open GM Event 2024 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Dec 30, 2024 | Nguyen | 1–0 | Vaidyanathan | Athens of the East 4th International Grand Master Open Chess Tournament-2024 CATEGORY A | Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation | |
| Dec 29, 2024 | Vaidyanathan | ½–½ | Ajay Santhosh Parvathareddy | Athens of the East 4th International Grand Master Open Chess Tournament-2024 CATEGORY A | Nimzo-Indian Defense: Leningrad Variation | |
| Jan 19, 2024 | Selvamurugan | 1–0 | Vaidyanathan | 1st Bangalore International Grandmasters Open Chess Tournament-2024 (Category 'B') | Nimzo-Larsen Attack: Classical Variation | |
| — | Vaidyanathan | 0–1 | Ahmadinia | Round 9: Vaidyanathan, Kannan - Ahmadinia, Ebrahim | Slav Defense: Modern Line | |
| — | Vaidyanathan | * | Nemeth | One Week IMB | ? | |
| — | Vaidyanathan | ½–½ | Le Ruyet | One Week IMB | Nimzo-Indian Defense: Rubinstein System | |
| — | Vaidyanathan | 0–1 | Lehocz | One Week IMB | Tarrasch Defense: Dubov Tarrasch | |
| — | Vaidyanathan | ½–½ | Gonzalez Garcia | One Week IMB | Nimzo-Indian Defense: Rubinstein System | |
| — | Vaidyanathan | * | Neverov | One Week IMB | ? | |
| — | Vaidyanathan | 0–1 | Sousa | Sala 2 - Masters | ? | |
| — | La Barbera | ½–½ | Vaidyanathan | One Week IMB | Sicilian Defense: Moscow Variation, Moscow Gambit | |
| — | Turcsanyi | ½–½ | Vaidyanathan | One Week IMB | English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation | |
| — | Jing | 1–0 | Vaidyanathan | One Week IMB | Neo-Grünfeld Defense: Classical Variation, Original Defense | |
| — | Konyves | * | Vaidyanathan | One Week IMB | ? | |
| — | Guy Levin | 1–0 | Vaidyanathan | Primo turno: Guy Levin - Vaidyanathan, Kannan | English Opening: King's English Variation, Four Knights Variation, Korchnoi Line | |
