| Jun 18, 2026 | Sahib Singh | 1–0 | Gunawardhana | 360 ONE MASTERS CHESS TOURNAMENT 2026 | Four Knights Game | |
| Jun 17, 2026 | Gunawardhana | 0–1 | Panesar Vedant | 360 ONE MASTERS CHESS TOURNAMENT 2026 | Caro-Kann Defense: Two Knights Attack, Mindeno Variation | |
| Jun 16, 2026 | De Silva | 1–0 | Gunawardhana | 360 ONE MASTERS CHESS TOURNAMENT 2026 | Catalan Opening | |
| Jun 15, 2026 | Gunawardhana | 0–1 | Gupta | 360 ONE MASTERS CHESS TOURNAMENT 2026 | Sicilian Defense: Chekhover Variation | |
| Jun 14, 2026 | Nikitenko | 0–1 | Gunawardhana | 360 ONE MASTERS CHESS TOURNAMENT 2026 | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| Jun 13, 2026 | Gunawardhana | 1–0 | Dixit | 360 ONE MASTERS CHESS TOURNAMENT 2026 | Modern Defense: Standard Line | |
| Jun 12, 2026 | Gunawardhana | 1–0 | Duran Vega | 360 ONE MASTERS CHESS TOURNAMENT 2026 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jun 11, 2026 | Sankalp Gupta | 1–0 | Gunawardhana | 360 ONE MASTERS CHESS TOURNAMENT 2026 | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| Jun 10, 2026 | Harsh Suresh | 1–0 | Gunawardhana | 360 ONE MASTERS CHESS TOURNAMENT 2026 | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Jun 6, 2026 | Mikheeva | ½–½ | Gunawardhana | Round 9: Mikheeva, Galina - Gunawardhana, Devindya Oshini | Four Knights Game: Scotch Variation Accepted | |
| Jun 5, 2026 | Gunawardhana | 0–1 | Karmanova | Round 8: Gunawardhana, Devindya Oshini - Karmanova, Olga Dm. | Ruy Lopez: Morphy Defense, Anderssen Variation | |
| Jun 4, 2026 | Zhou | 0–1 | Gunawardhana | Round 7: Zhou, Shumeng - Gunawardhana, Devindya Oshini | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| Jun 3, 2026 | Gunawardhana | 0–1 | Gomes | Round 6: Gunawardhana, Devindya Oshini - Gomes, Mary Ann | Sicilian Defense: Delayed Alapin Variation | |
| Jun 2, 2026 | Dorokhina | 0–1 | Gunawardhana | Round 5: Dorokhina, Elizaveta - Gunawardhana, Devindya Oshini | Nimzo-Indian Defense: Sämisch Variation | |
| Jun 1, 2026 | Gunawardhana | 1–0 | Margad | Round 4: Gunawardhana, Devindya Oshini - Margad, Munkhpurev | Caro-Kann Defense: Two Knights Attack | |
| May 31, 2026 | Mendoza | ½–½ | Gunawardhana | Round 3: Mendoza, Shania Mae - Gunawardhana, Devindya Oshini | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| May 30, 2026 | Gunawardhana | 1–0 | Unurzul | Round 2: Gunawardhana, Devindya Oshini - Unurzul, Davaakhuu | Sicilian Defense: Hyperaccelerated Dragon | |
| May 29, 2026 | Khulan | 1–0 | Gunawardhana | Round 1: Khulan, Enkhsaikhan - Gunawardhana, Devindya Oshini | Bogo-Indian Defense: Nimzowitsch Variation | |
| Feb 16, 2026 | Egor BOGDANOV | ½–½ | Gunawardhana | Round 2: Egor BOGDANOV - Gunawardhana, Devindya Oshini | King's Knight Opening: Konstantinopolsky | |
| Feb 6, 2026 | Gunawardhana | ½–½ | Esshan Wadhawan | SixDays February 2026 IM B | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Feb 5, 2026 | Pandey Srishti | ½–½ | Gunawardhana | SixDays February 2026 IM B | Four Knights Game | |
| Feb 5, 2026 | Gunawardhana | ½–½ | Ayaan Garg | SixDays February 2026 IM B | Caro-Kann Defense: Panov Attack, Fianchetto Defense | |
| Feb 3, 2026 | Kienboeck | 0–1 | Gunawardhana | SixDays February 2026 IM B | Bogo-Indian Defense: Grünfeld Variation | |
| Feb 3, 2026 | Gunawardhana | 1–0 | Pribelszky | SixDays February 2026 IM B | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Feb 2, 2026 | Horvath | ½–½ | Gunawardhana | SixDays February 2026 IM B | Bogo-Indian Defense: Grünfeld Variation | |
| Feb 2, 2026 | Gunawardhana | 1–0 | Hacker | SixDays February 2026 IM B | Caro-Kann Defense: Two Knights Attack, Mindeno Variation | |
| Feb 1, 2026 | Sanjay Narayanan P S | 1–0 | Gunawardhana | SixDays February 2026 IM B | Scotch Game: Scotch Gambit, Advance Variation | |
| Jan 31, 2026 | Semprun Martinez | 0–1 | Gunawardhana | SixDays February 2026 IM B | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Jan 30, 2026 | Gunawardhana | 1–0 | Mrozowski | SixDays January 2026 IM A | Sicilian Defense: Classical Variation, Anti-Sozin Variation | |
| Jan 29, 2026 | Daaevik Wadhawan | 1–0 | Gunawardhana | SixDays January 2026 IM A | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jan 28, 2026 | Gunawardhana | ½–½ | Szeberenyi | SixDays January 2026 IM A | French Defense: Classical Variation | |
| Jan 27, 2026 | Coles | ½–½ | Gunawardhana | SixDays January 2026 IM A | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| Jan 27, 2026 | Gunawardhana | 1–0 | Sahithi Varshini M | SixDays January 2026 IM A | Sicilian Defense: Chekhover Variation | |
| Jan 26, 2026 | Vuelban | 0–1 | Gunawardhana | SixDays January 2026 IM A | Bogo-Indian Defense: Nimzowitsch Variation | |
| Jan 26, 2026 | Gunawardhana | 1–0 | Ayaan Garg | SixDays January 2026 IM A | Caro-Kann Defense: Two Knights Attack, Mindeno Variation | |
| Jan 25, 2026 | Jake Shanty | ½–½ | Gunawardhana | SixDays January 2026 IM A | Zukertort Opening | |
| Jan 24, 2026 | Gunawardhana | 1–0 | Pasti | OneWeek IM-B | Ruy Lopez: Morphy Defense, Anderssen Variation | |
| Jan 23, 2026 | Wen | 1–0 | Gunawardhana | SixDays January 2026 IM A | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jan 23, 2026 | Meessen | 0–1 | Gunawardhana | OneWeek IM-B | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit | |
| Jan 23, 2026 | Gunawardhana | 1–0 | Jake Shanty | OneWeek IM-B | French Defense: Classical Variation, Burn Variation, Morozevich Line | |
| Jan 22, 2026 | Unat | ½–½ | Gunawardhana | OneWeek IM-B | Center Game: Hall Variation | |
| Jan 21, 2026 | Gunawardhana | 0–1 | Csernyik | OneWeek IM-B | Sicilian Defense: Hyperaccelerated Dragon | |
| Jan 20, 2026 | Ayaan Garg | 1–0 | Gunawardhana | OneWeek IM-B | Queen's Gambit Declined: Barmen Variation | |
| Jan 20, 2026 | Gunawardhana | 0–1 | Horvath | OneWeek IM-B | French Defense: Classical Variation, Burn Variation | |
| Jan 19, 2026 | Szeberenyi | 1–0 | Gunawardhana | OneWeek IM-B | Bogo-Indian Defense: Nimzowitsch Variation | |
| Dec 13, 2025 | Pribelszky | 0–1 | Gunawardhana | OneWeek IM-B | King's Indian Attack | |
| Jul 7, 2025 | Gunawardhana | ½–½ | Lee | Women's World Cup 2025 | Sicilian Defense: Old Sicilian | |
| Jul 5, 2025 | Lee | 1–0 | Gunawardhana | Women's World Cup 2025 | Indian Defense: Knights Variation | |
| May 15, 2025 | Gunawardhana | ½–½ | Latifah | Round 9: Gunawardhana, Devindya Oshini - Latifah, Laysa | French Defense: Winawer Variation, Advance Variation | |
| May 14, 2025 | Kaliakhmet | 1–0 | Gunawardhana | Round 8: Kaliakhmet, Elnaz - Gunawardhana, Devindya Oshini | Nimzo-Indian Defense: Normal Variation, Ragozin Variation | |
| May 13, 2025 | Khamdamova | 1–0 | Gunawardhana | Round 7: Khamdamova, Afruza - Gunawardhana, Devindya Oshini | Ruy Lopez: Morphy Defense, Arkhangelsk Variation | |
| May 12, 2025 | Gunawardhana | 1–0 | Bayasgalan | Round 6: Gunawardhana, Devindya Oshini - Bayasgalan, Khishigbaatar | Sicilian Defense: Chekhover Variation | |
| May 11, 2025 | Omonova | 0–1 | Gunawardhana | Round 5: Omonova, Umida - Gunawardhana, Devindya Oshini | Scotch Game: Potter Variation | |
| May 10, 2025 | Serikbay | * | Gunawardhana | Round 9: Serikbay, Assel - Gunawardhana, Devindya Oshini | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| May 10, 2025 | Gunawardhana | * | Fronda | Round 8: Gunawardhana, Devindya Oshini - Fronda, Jan Jodilyn | Scotch Game: Scotch Gambit, Sarratt Variation | |
| May 10, 2025 | Frayna | 0–1 | Gunawardhana | Round 7: Frayna, Janelle Mae - Gunawardhana, Devindya Oshini | Four Knights Game: Scotch Variation Accepted | |
| May 10, 2025 | Gunawardhana | * | Sananda R | Round 6: Gunawardhana, Devindya Oshini - Sananda R | ? | |
| May 10, 2025 | Padmini | * | Gunawardhana | Round 5: Padmini, Rout - Gunawardhana, Devindya Oshini | King's Indian Attack | |
| May 10, 2025 | Gunawardhana | * | Pragnya H G | Round 4: Gunawardhana, Devindya Oshini - Pragnya H G | ? | |
| May 10, 2025 | Pham | * | Gunawardhana | Round 3: Pham, Le Thao Nguyen - Gunawardhana, Devindya Oshini | Queen's Gambit Declined: Neo-Orthodox Variation, Main Line | |
| May 10, 2025 | Gunawardhana | 1–0 | Nandinjiguur | Round 2: Gunawardhana, Devindya Oshini - Nandinjiguur, Chinzorig | Ruy Lopez: Morphy Defense, Anderssen Variation | |
| May 10, 2025 | Nomin-Erdene | 1–0 | Gunawardhana | Round 1: Nomin-Erdene, Davaademberel - Gunawardhana, Devindya Oshini | Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line | |
| May 10, 2025 | Gunawardhana | 1–0 | Aktamova | Round 4: Gunawardhana, Devindya Oshini - Aktamova, Zilola | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| May 9, 2025 | Savitha Shri B | 1–0 | Gunawardhana | Round 3: Savitha Shri B - Gunawardhana, Devindya Oshini | Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred | |
| May 8, 2025 | Gunawardhana | 1–0 | Nandinjiguur | Round 2: Gunawardhana, Devindya Oshini - Nandinjiguur, Chinzorig | Ruy Lopez: Closed | |
| May 7, 2025 | Nurman | 1–0 | Gunawardhana | Round 1: Nurman, Alua - Gunawardhana, Devindya Oshini | Scotch Game: Paulsen Attack | |
| Apr 11, 2025 | Gunawardhana | 0–1 | Anuj Shrivatri | Round 2: Gunawardhana, Devindya Oshini - Anuj Shrivatri | Sicilian Defense: Chekhover Variation | |
| Mar 18, 2025 | Gunawardhana | 1–0 | Palliyage | Round 9: Gunawardhana, Devindya Oshini - Palliyage, Sethumlee Devhara | Ruy Lopez: Morphy Defense, Anderssen Variation | |
| Mar 17, 2025 | Newansa | 0–1 | Gunawardhana | Round 8: Newansa, M Esandi - Gunawardhana, Devindya Oshini | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Mar 16, 2025 | Gunawardhana | 0–1 | Wadifa | Round 7: Gunawardhana, Devindya Oshini - Wadifa, Ahmed | Sicilian Defense: Najdorf Variation | |
| Mar 15, 2025 | Sanudula | 0–1 | Gunawardhana | Round 6: Sanudula, K M Dahamdi - Gunawardhana, Devindya Oshini | Queen's Gambit Declined: Three Knights Variation | |
| Mar 14, 2025 | Gunawardhana | 1–0 | Mendis | Round 5: Gunawardhana, Devindya Oshini - Mendis, Imethra | Ruy Lopez: Berlin Defense, Rio Gambit Accepted | |
| Mar 13, 2025 | Jayasundara | 0–1 | Gunawardhana | Round 4: Jayasundara, J M Theruni V - Gunawardhana, Devindya Oshini | Queen's Gambit Declined: Exchange Variation, Reshevsky Variation | |
| Mar 11, 2025 | Tharushi | 1–0 | Gunawardhana | Round 2: Tharushi, T H D Niklesha - Gunawardhana, Devindya Oshini | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jan 11, 2025 | Das | 1–0 | Gunawardhana | Late Shri Manohar Parrikar Goa International Open Grand Master Chess Tournament 2025 | English Opening: King's English Variation | |
| Sep 22, 2024 | Gunawardhana | 1–0 | Eftovska | 45th FIDE Women's Chess Olympiad | Ruy Lopez: Morphy Defense, Anderssen Variation | |
| Sep 21, 2024 | Gunawardhana | 1–0 | James | 45th FIDE Women's Chess Olympiad | Ruy Lopez: Schliemann Defense | |
| Sep 20, 2024 | Gunawardhana | 1–0 | Garcia Andrada | 45th FIDE Women's Chess Olympiad | Sicilian Defense: French Variation | |
| Sep 19, 2024 | Lehaci | ½–½ | Gunawardhana | 45th FIDE Women's Chess Olympiad | Scotch Game: Malaniuk Variation | |
| Sep 18, 2024 | Gunawardhana | 1–0 | Machlik | 45th FIDE Women's Chess Olympiad | Caro-Kann Defense: Two Knights Attack | |
| Sep 16, 2024 | Allam | 0–1 | Gunawardhana | 45th FIDE Women's Chess Olympiad | Italian Game: Classical Variation, Giuoco Pianissimo, with a6 | |
| Sep 15, 2024 | Gunawardhana | 1–0 | Tjong Tjin Joe | 45th FIDE Women's Chess Olympiad | Ruy Lopez: Berlin Defense | |
| Sep 14, 2024 | Gunawardhana | 1–0 | Pride | 45th FIDE Women's Chess Olympiad | Philidor Defense | |
| Sep 13, 2024 | Gunawardhana | 1–0 | Doue | 45th FIDE Women's Chess Olympiad | Ruy Lopez: Berlin Defense, Improved Steinitz Defense | |
| Jul 29, 2024 | Gunawardhana | 0–1 | Mitrabha | Round 2: Gunawardhana, Devindya Oshini - Mitrabha, Guha | French Defense: Winawer Variation, Advance Variation | |
| Jul 21, 2024 | Gunawardhana | 1–0 | Sachi Jain | Round 9: Gunawardhana, Devindya Oshini - Sachi Jain | French Defense: Winawer Variation, Bogoljubow Variation | |
| Jul 20, 2024 | Shubhi Gupta | 0–1 | Gunawardhana | Round 8: Shubhi Gupta - Gunawardhana, Devindya Oshini | Queen's Gambit Declined: Three Knights Variation | |
| Jul 19, 2024 | Gunawardhana | 1–0 | Rathnayake | Round 7: Gunawardhana, Devindya Oshini - Rathnayake, R M Dulinma Hemalni | Sicilian Defense: Chekhover Variation | |
| Jul 19, 2024 | Wadifa | ½–½ | Gunawardhana | Round 6: Wadifa, Ahmed - Gunawardhana, Devindya Oshini | Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred | |
| Jul 19, 2024 | Kholyavko | ½–½ | Gunawardhana | Round 5: Kholyavko, Mariya - Gunawardhana, Devindya Oshini | Scotch Game: Classical Variation | |
| Jul 17, 2024 | Gunawardhana | 1–0 | Keerti Shree Reddy | Round 4: Gunawardhana, Devindya Oshini - Keerti Shree Reddy | Sicilian Defense: Chekhover Variation | |
| Jul 17, 2024 | Gunawardhana | 0–1 | Mikheeva | Round 3: Gunawardhana, Devindya Oshini - Mikheeva, Galina | Ruy Lopez: Berlin Defense | |
| Jul 16, 2024 | Asudani Ruhani Raj | 0–1 | Gunawardhana | Round 2: Asudani Ruhani Raj - Gunawardhana, Devindya Oshini | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jul 2, 2024 | Zavivaeva | 0–1 | Gunawardhana | Game 2: Zavivaeva, Kristina - Gunawardhana, Devindya Oshini | Italian Game: Classical Variation, Giuoco Pianissimo, with a6 | |
| Jul 1, 2024 | Gunawardhana | 1–0 | Zavivaeva | Game 1: Gunawardhana, Devindya Oshini - Zavivaeva, Kristina | Sicilian Defense: Chekhover Variation | |
| Jun 23, 2024 | Vazquez Sanchez | 0–1 | Gunawardhana | Round 1: Vazquez Sanchez, Antia - Gunawardhana, Devindya Oshini | Indian Defense: Anti-Nimzo-Indian | |
| Jun 21, 2024 | Bassari | 0–1 | Gunawardhana | Round 7: Bassari, Senem Gul - Gunawardhana, Devindya Oshini | Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred | |
| Jun 21, 2024 | Gunawardhana | 0–1 | Pratitee Bordoloi | Round 6: Gunawardhana, Devindya Oshini - Pratitee Bordoloi | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Jun 21, 2024 | Sreekarthika Velmurugan | 0–1 | Gunawardhana | Round 5: Sreekarthika Velmurugan - Gunawardhana, Devindya Oshini | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jun 21, 2024 | Gunawardhana | 1–0 | Amanzhol | Round 4: Gunawardhana, Devindya Oshini - Amanzhol, Khanzada | Sicilian Defense: Closed, Traditional | |