| Jun 26, 2026 | Tsarkou | 1–0 | Siva Kumar | Round 11: Tsarkou, Mikhail - Siva Kumar, Nirish Kumar | King's Indian Defense: Karpov System | |
| Jun 25, 2026 | Siva Kumar | ½–½ | Valpas | Round 10: Siva Kumar, Nirish Kumar - Valpas, Jami | Zukertort Opening: Sicilian Invitation | |
| Jun 24, 2026 | Siva Kumar | 1–0 | Fuertler | Round 9: Siva Kumar, Nirish Kumar - Fuertler, Oliver | Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation | |
| Jun 23, 2026 | Medhus | 1–0 | Siva Kumar | World Youth Chess Championship 2026 U18 Open | Sicilian Defense: Dragon Variation, Yugoslav Attack, Main Line | |
| Jun 22, 2026 | Nainys | 1–0 | Siva Kumar | Round 7: Nainys, Zanas - Siva Kumar, Nirish Kumar | King's Indian Defense: Normal Variation, Rare Defenses | |
| Jun 20, 2026 | Siva Kumar | ½–½ | Zieba | Round 6: Siva Kumar, Nirish Kumar - Zieba, Hubert | Sicilian Defense: Four Knights Variation, Exchange Variation | |
| Jun 19, 2026 | Siva Kumar | 0–1 | Hagner | Round 5: Siva Kumar, Nirish Kumar - Hagner, Bennet | Sicilian Defense: Najdorf Variation | |
| Jun 18, 2026 | Petukhov | 0–1 | Siva Kumar | Round 4: Petukhov, Alan - Siva Kumar, Nirish Kumar | King's Indian Defense: Fianchetto Variation, Classical Variation | |
| Jun 17, 2026 | Siva Kumar | 1–0 | Marra | Round 3: Siva Kumar, Nirish Kumar - Marra, Lorenzo | Italian Game: Anti-Fried Liver Defense | |
| Jun 16, 2026 | Torfoss | 1–0 | Siva Kumar | Round 2: Torfoss, Sivert Schanche - Siva Kumar, Nirish Kumar | English Opening: Anglo-Indian Defense | |
| Jun 15, 2026 | Siva Kumar | 1–0 | Mazzanti | Round 1: Siva Kumar, Nirish Kumar - Mazzanti, Francesco | Four Knights Game: Spanish Variation, Nimzowitsch Variation | |
| May 25, 2026 | Deepan Chakkravarthy J. | 1–0 | Siva Kumar | Round 9: Deepan Chakkravarthy J. - Siva Kumar, Nirish Kumar | Sicilian Defense | |
| May 24, 2026 | Liyanage | 1–0 | Siva Kumar | Round 8: Liyanage, Ranindu Dilshan - Siva Kumar, Nirish Kumar | Sicilian Defense: French Variation | |
| May 23, 2026 | Siva Kumar | 1–0 | Srihari L R | Round 7: Siva Kumar, Nirish Kumar - Srihari L R | Caro-Kann Defense: Exchange Variation | |
| May 21, 2026 | Siva Kumar | ½–½ | Ananya Raman | Round 5: Siva Kumar, Nirish Kumar - Ananya Raman | Sicilian Defense: Najdorf Variation | |
| May 20, 2026 | Venkatesh | 1–0 | Siva Kumar | Round 4: Venkatesh, M.R. - Siva Kumar, Nirish Kumar | Sicilian Defense: Closed, Traditional | |
| May 20, 2026 | Siva Kumar | ½–½ | Reyan Md. | Round 4: Siva Kumar, Nirish Kumar - Reyan Md. | French Defense: Classical Variation, Shirov-Anand Variation | |
| May 19, 2026 | Siva Kumar | 1–0 | Shyaam Nikhil P | Round 3: Siva Kumar, Nirish Kumar - Shyaam Nikhil P | Sicilian Defense: Najdorf Variation | |
| May 18, 2026 | Md Zayan | 0–1 | Siva Kumar | Round 9: Md Zayan, Khan - Siva Kumar, Nirish Kumar | Trompowsky Attack | |
| May 18, 2026 | Siva Kumar | 1–0 | Somarathne | Round 8: Siva Kumar, Nirish Kumar - Somarathne, Senuka Damsath | French Defense: Advance Variation | |
| May 18, 2026 | Siva Kumar | ½–½ | Nandish V S | Round 6: Siva Kumar, Nirish Kumar - Nandish V S | Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation | |
| May 18, 2026 | Hettiarachchi | 0–1 | Siva Kumar | Round 5: Hettiarachchi, Jeewantha Aloka - Siva Kumar, Nirish Kumar | King's Indian Defense: Makogonov Variation | |
| May 18, 2026 | Saksham Wadhwa | ½–½ | Siva Kumar | Round 3: Saksham Wadhwa - Siva Kumar, Nirish Kumar | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Apr 16, 2026 | Danylenko | 1–0 | Siva Kumar | 23rd Bangkok Chess Club Open 2026 | Queen's Gambit Declined: Semi-Tarrasch Defense | |
| Apr 14, 2026 | Zhao | 1–0 | Siva Kumar | new tournament description | King's Indian Defense: Makogonov Variation | |
| Apr 14, 2026 | Zhao | * | Siva Kumar | new tournament description | King's Indian Defense: Makogonov Variation | |
| Apr 4, 2026 | Chong | 1–0 | Siva Kumar | [MCC - Open] Malaysian Chess Championship 2026 @ UTeM Melaka (Open) | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Apr 4, 2026 | Siva Kumar | 0–1 | Shahar | [MCC - Open] Malaysian Chess Championship 2026 @ UTeM Melaka (Open) | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Apr 3, 2026 | Julmiri | ½–½ | Siva Kumar | [MCC - Open] Malaysian Chess Championship 2026 @ UTeM Melaka (Open) | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Apr 3, 2026 | Chow | 0–1 | Siva Kumar | [MCC - Open] Malaysian Chess Championship 2026 @ UTeM Melaka (Open) | Ruy Lopez: Morphy Defense, Modern Steinitz Defense | |
| Apr 2, 2026 | Siva Kumar | 1–0 | Ng | [MCC - Open] Malaysian Chess Championship 2026 @ UTeM Melaka (Open) | Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation | |
| Apr 2, 2026 | Siva Kumar | 1–0 | Wan Abd Rahim | [MCC - Open] Malaysian Chess Championship 2026 @ UTeM Melaka (Open) | French Defense: Exchange Variation | |
| Apr 2, 2026 | Siva Kumar | 1–0 | Wan Abd Rahim | [MCC - Open] Malaysian Chess Championship 2026 @ UTeM Melaka (Open) | French Defense: Exchange Variation | |
| Apr 1, 2026 | Lim | ½–½ | Siva Kumar | [MCC - Open] Malaysian Chess Championship 2026 @ UTeM Melaka (Open) | English Opening: Anglo-Indian Defense, King's Indian Formation | |
| Dec 22, 2025 | Dang Hoang Son | 1–0 | Siva Kumar | Round 7: Dang Hoang Son - Siva Kumar, Nirish Kumar | Caro-Kann Defense: Panov Attack, Fianchetto Defense | |
| Dec 20, 2025 | Siva Kumar | 0–1 | Nguyen | Round 4: Siva Kumar, Nirish Kumar - Nguyen, Duc Hoa | Nimzo-Larsen Attack: Classical Variation | |
| Sep 14, 2025 | Kovacevic | 1–0 | Siva Kumar | Round 9: Kovacevic, Blazimir - Siva Kumar, Nirish Kumar | Dutch Defense | |
| Sep 13, 2025 | Siva Kumar | 1–0 | Simoli | Round 8: Siva Kumar, Nirish Kumar - Simoli, Sergio | Sicilian Defense: Scheveningen Variation, Classical Variation | |
| Sep 12, 2025 | Proietti Cobas | ½–½ | Siva Kumar | Round 7: Proietti Cobas, Jorge - Siva Kumar, Nirish Kumar | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Sep 11, 2025 | Siva Kumar | 0–1 | Di Benedetto | Round 6: Siva Kumar, Nirish Kumar - Di Benedetto, Edoardo | French Defense: Exchange Variation | |
| Sep 10, 2025 | Pintor | 0–1 | Siva Kumar | Round 5: Pintor, Simao - Siva Kumar, Nirish Kumar | Modern Defense: Geller's System | |
| Sep 10, 2025 | Siva Kumar | 0–1 | Kalyani Sirin | Round 4: Siva Kumar, Nirish Kumar - Kalyani Sirin | Four Knights Game: Spanish Variation, Nimzowitsch Variation | |
| Sep 8, 2025 | Siva Kumar | 1–0 | Mrozowski | Round 2: Siva Kumar, Nirish Kumar - Mrozowski, Nikodem | King's Indian Attack: Symmetrical Defense | |
| Sep 7, 2025 | Muellneritsch | 0–1 | Siva Kumar | Round 1: Muellneritsch, Anton - Siva Kumar, Nirish Kumar | Nimzowitsch Defense | |
| Sep 5, 2025 | Siva Kumar | ½–½ | Serdr Murat Yildiz | Nono turno: Siva Kumar, Nirish Kumar - Serdr Murat Yildiz | Zukertort Opening: Quiet System | |
| Sep 4, 2025 | Jacub Stinka | ½–½ | Siva Kumar | Ottavo turno: Jacub Stinka - Siva Kumar, Nirish Kumar | Sicilian Defense: Löwenthal Variation | |
| Sep 3, 2025 | Siva Kumar | ½–½ | Fedorovsky | Settimo turno: Siva Kumar, Nirish Kumar - Fedorovsky, Michael | King's Indian Attack | |
| Sep 1, 2025 | Pultinevicius | 1–0 | Siva Kumar | Round 3: Pultinevicius, Paulius - Siva Kumar, Nirish Kumar | King's Indian Defense: Orthodox Variation | |
| Jul 28, 2025 | Siva Kumar | 0–1 | Sachilaru | Round 4: Siva Kumar, Nirish Kumar - Sachilaru, Alexandru | Sicilian Defense: Dragon Variation | |
| Jun 19, 2025 | Lye | ½–½ | Siva Kumar | Round 3: Lye, Lik Zang - Siva Kumar, Nirish Kumar | Tarrasch Defense: Classical Variation, Advance Variation | |
| Jun 18, 2025 | Yeap | ½–½ | Siva Kumar | Round 9: Yeap, Eng Chiam - Siva Kumar, Nirish Kumar | Modern Defense | |
| Jun 18, 2025 | Siva Kumar | ½–½ | Kavin Mohan | Round 8: Siva Kumar, Nirish Kumar - Kavin Mohan | Sicilian Defense: French Variation | |
| Jun 18, 2025 | Shahar | ½–½ | Siva Kumar | Round 7: Shahar, Uzair - Siva Kumar, Nirish Kumar | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit | |
| Jun 18, 2025 | Siva Kumar | 1–0 | Genkeswaran | Round 6: Siva Kumar, Nirish Kumar - Genkeswaran, Genivan | French Defense: King's Indian Attack | |
| Jun 18, 2025 | Zulkipli | 0–1 | Siva Kumar | Round 5: Zulkipli, Zaidan - Siva Kumar, Nirish Kumar | ? | |
| Jun 18, 2025 | Siva Kumar | 0–1 | Masli | Round 4: Siva Kumar, Nirish Kumar - Masli, Muhd Nur Daie | King's Indian Attack: Sicilian Variation | |
| Jun 18, 2025 | Siva Kumar | 0–1 | Shen | Round 2: Siva Kumar, Nirish Kumar - Shen, Ree Herng | Neo-Grünfeld Defense: Classical Variation, Modern Defense | |
| Jun 18, 2025 | Chong | 0–1 | Siva Kumar | Round 1: Chong, Jin Cheng - Siva Kumar, Nirish Kumar | Modern Defense: Standard Defense | |
| Jun 11, 2025 | Siva Kumar | ½–½ | Keinanen | Round 6: Siva Kumar, Nirish Kumar - Keinanen, Toivo | King's Indian Defense: Orthodox Variation | |
| Jun 10, 2025 | Filip | 0–1 | Siva Kumar | Round 5: Filip, Lucian-Ioan - Siva Kumar, Nirish Kumar | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Jun 9, 2025 | Noy | 1–0 | Siva Kumar | Round 3: Noy, Eyal - Siva Kumar, Nirish Kumar | Queen's Gambit Accepted: Central Variation, McDonnell Defense | |
| Jun 8, 2025 | Kobo | 1–0 | Siva Kumar | Round 1: Kobo, Ori - Siva Kumar, Nirish Kumar | Queen's Pawn Game: Colle System | |
| Jun 2, 2025 | Kalinichenko | ½–½ | Siva Kumar | Round 9: Kalinichenko, Yury - Siva Kumar, Nirish Kumar | Sicilian Defense: Classical Variation, Sozin Attack | |
| Jun 2, 2025 | Siva Kumar | 1–0 | Krasnikov | Round 8: Siva Kumar, Nirish Kumar - Krasnikov, Namik | Sicilian Defense: Four Knights Variation | |
| Jun 1, 2025 | Peng | 0–1 | Siva Kumar | Round 7: Peng, Tianlu - Siva Kumar, Nirish Kumar | Scotch Game: Classical Variation | |
| Jul 26, 2024 | Garde | ½–½ | Siva Kumar | 30e Open International de Saint Affrique | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jul 25, 2024 | Siva Kumar | ½–½ | Buscara | 30e Open International de Saint Affrique | Zukertort Opening: Sicilian Invitation | |
| Jul 24, 2024 | Travadon | ½–½ | Siva Kumar | 30e Open International de Saint Affrique | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit | |
| Jul 22, 2024 | Siva Kumar | ½–½ | Toulzac | 30e Open International de Saint Affrique | Modern Defense: Standard Defense | |
| Jun 20, 2024 | Hommadov | 1–0 | Siva Kumar | Round 1: Hommadov, Amanmuhammet - Siva Kumar, Nirish Kumar | French Defense: Advance Variation, Milner-Barry Gambit, Hector Variation | |
| Jun 12, 2024 | Dau Khuong Duy | 1–0 | Siva Kumar | Round 1: Dau Khuong Duy - Siva Kumar, Nirish Kumar | Pirc Defense: 150 Attack | |
| Jun 10, 2024 | Khripachenko | 1–0 | Siva Kumar | Round 1: Khripachenko, Alexander - Siva Kumar, Nirish Kumar | Modern Defense: Two Knights Variation | |
| Aug 3, 2024 | Siva Kumar | 0–1 | Mohammad Nubairshah Shaikh | Round 8: Siva Kumar, Nirish Kumar - Mohammad Nubairshah Shaikh | Sicilian Defense: Kan Variation, Modern Variation | |
| — | Siva Kumar | 1–0 | Valsecchi | Round 2: Siva Kumar, Nirish Kumar - Valsecchi, Alessio | Zukertort Opening | |
| — | Siva Kumar | 0–1 | Grigoryan | Round 4: Siva Kumar, Nirish Kumar - Grigoryan, Karen H. | Sicilian Defense: Modern Variations | |
| — | Siva Kumar | 1–0 | Hofegger | Round 6: Siva Kumar, Nirish Kumar - Hofegger, Jakob | Indian Defense: London System | |
| — | Siva Kumar | ½–½ | Birkisson | Round 8: Siva Kumar, Nirish Kumar - Birkisson, Bardur Orn | Zukertort Opening | |
| — | Siva Kumar | * | Pancevski | Secondo turno: Siva Kumar, Nirish Kumar - Pancevski, Filip | Indian Defense: Przepiorka Variation | |
| — | Siva Kumar | * | Pancevski | Secondo turno: Siva Kumar, Nirish Kumar - Pancevski, Filip | Queen's Gambit Declined: Ragozin Defense, Alekhine Variation | |
| — | Filip | ½–½ | Siva Kumar | Round 9: Filip, Andrei - Siva Kumar, Nirish Kumar | Modern Defense | |
| — | Bettalli | 1–0 | Siva Kumar | Round 3: Bettalli, Francesco - Siva Kumar, Nirish Kumar | Sicilian Defense: Modern Variations, Main Line | |
| — | Cappelletto | 1–0 | Siva Kumar | Round 9: Cappelletto, Joshuaede - Siva Kumar, Nirish Kumar | Sicilian Defense: Najdorf Variation, Adams Attack | |
| — | Capaliku | 0–1 | Siva Kumar | Round 1: Capaliku, Aleks - Siva Kumar, Nirish Kumar | Bird Opening | |
| — | Quintiliano | 1–0 | Siva Kumar | Round 3: Quintiliano, Renato R. - Siva Kumar, Nirish Kumar | Zukertort Opening | |
| — | Sunyuktha C M N | ½–½ | Siva Kumar | Round 5: Sunyuktha C M N - Siva Kumar, Nirish Kumar | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| — | Botta | 0–1 | Siva Kumar | Round 7: Botta, Massimiliano - Siva Kumar, Nirish Kumar | Zukertort Opening | |
| — | Felix | 0–1 | Siva Kumar | Round 9: Felix, Raphael - Siva Kumar, Nirish Kumar | Caro-Kann Defense: Tartakower Variation | |