| Feb 14, 2026 | Wang | * | De Silva | Round 2: Wang, Anlan - De Silva, Sithun | ? | |
| Feb 13, 2026 | De Silva | 0–1 | Norris | Round 1: De Silva, Sithun - Norris, Ethan | Sicilian Defense: Moscow Variation, Main Line | |
| Oct 12, 2025 | De Silva | 1–0 | Xu | Round 9: De Silva, Sithun - Xu, Jiarui | Scotch Game: Lolli Variation | |
| Oct 12, 2025 | Chapman | ½–½ | De Silva | Round 8: Chapman, Luke - De Silva, Sithun | Caro-Kann Defense: Maróczy Variation | |
| Oct 12, 2025 | Lee | ½–½ | De Silva | Round 7: Lee, Yuk Hei - De Silva, Sithun | Semi-Slav Defense | |
| Oct 12, 2025 | De Silva | ½–½ | Johnson | Round 6: De Silva, Sithun - Johnson, Felix | Slav Defense | |
| Oct 11, 2025 | De Silva | ½–½ | Saxena | Round 5: De Silva, Sithun - Saxena, Samidh | French Defense: Tarrasch Variation, Open System | |
| Oct 11, 2025 | Van Hensbergen | ½–½ | De Silva | Round 4: Van Hensbergen, Adri - De Silva, Sithun | Caro-Kann Defense: Maróczy Variation | |
| Oct 11, 2025 | De Silva | 1–0 | Hornsby | Round 3: De Silva, Sithun - Hornsby, Albert | French Defense: Tarrasch Variation, Open System | |
| Oct 11, 2025 | Allwin Christopher | 1–0 | De Silva | Round 2: Allwin Christopher, Dan Joal - De Silva, Sithun | Nimzo-Indian Defense: Classical Variation | |
| Oct 11, 2025 | De Silva | * | Ou | Round 1: De Silva, Sithun - Ou, Siyuan | ? | |
| Jul 30, 2025 | De Silva | 1–0 | Tagg | Round 5: De Silva, Sithun - Tagg, George | Sicilian Defense: Classical Variation, Sozin Attack | |
| Jul 29, 2025 | Yip | 0–1 | De Silva | Round 4: Yip, Oscar - De Silva, Sithun | Caro-Kann Defense: Exchange Variation | |
| Jul 29, 2025 | Heron | 0–1 | De Silva | Round 3: Heron, Lorcan - De Silva, Sithun | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Jul 28, 2025 | De Silva | 1–0 | Roberts | Round 2: De Silva, Sithun - Roberts, Jamie | French Defense: Tarrasch Variation, Closed Variation, Main Line | |
| Jul 28, 2025 | Bates | 0–1 | De Silva | Round 1: Bates, Hubert - De Silva, Sithun | Scandinavian Defense: Mieses-Kotroc Variation | |
| Jun 26, 2025 | De Silva | 1–0 | Rasalingam | Round 6: De Silva, Sithun - Rasalingam, Rishi | King's Indian Defense: Sämisch Variation, Normal Defense | |
| Jun 26, 2025 | Clarkson | 1–0 | De Silva | Round 5: Clarkson, George - De Silva, Sithun | Queen's Pawn Game: London System | |
| Jun 25, 2025 | Pang | 1–0 | De Silva | Round 3: Pang, Ethan - De Silva, Sithun | French Defense: Schlechter Variation | |
| Jun 25, 2025 | De Silva | ½–½ | Agrawal | Round 2: De Silva, Sithun - Agrawal, Shivam | Caro-Kann Defense: Two Knights Attack, Mindeno Variation | |
| Jun 25, 2025 | Salman | 1–0 | De Silva | Round 1: Salman, Haytham - De Silva, Sithun | Scandinavian Defense: Mieses-Kotroc Variation | |
| Apr 21, 2025 | De Silva | ½–½ | Cast | Round 6: De Silva, Sithun - Cast, Julian | Lion Defense: Anti-Philidor, Lion's Cave | |
| Apr 21, 2025 | Ward | 1–0 | De Silva | Round 7: Ward, Cian - De Silva, Sithun | French Defense: Tarrasch Variation, Chistyakov Defense | |
| Apr 20, 2025 | De Silva | 0–1 | Vaidyanathan | Round 5: De Silva, Sithun - Vaidyanathan, Adithya | Indian Defense: Przepiorka Variation | |
| Apr 20, 2025 | Gunarathne | ½–½ | De Silva | Round 4: Gunarathne, Senith Thenula - De Silva, Sithun | Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation | |
| Apr 19, 2025 | De Silva | ½–½ | Varley | Round 3: De Silva, Sithun - Varley, Joe | King's Indian Defense: Fianchetto Variation, Immediate Fianchetto | |
| Apr 19, 2025 | Dilley | ½–½ | De Silva | Round 2: Dilley, Jason M - De Silva, Sithun | Semi-Slav Defense: Meran Variation, Wade Variation | |
| Feb 21, 2025 | De Silva | 1–0 | Shah | Round 6: De Silva, Sithun - Shah, Samuel | Queen's Gambit Declined | |
| Feb 20, 2025 | De Silva | ½–½ | Walley | Round 4: De Silva, Sithun - Walley, A Clive | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Feb 20, 2025 | Foo | 1–0 | De Silva | Round 5: Foo, Jiu Weir Brien - De Silva, Sithun | Indian Defense: Anti-Nimzo-Indian | |
| Feb 19, 2025 | Gore | ½–½ | De Silva | Round 3: Gore, Bob R - De Silva, Sithun | Zukertort Opening | |
| Feb 18, 2025 | De Silva | 1–0 | Saxena | Round 2: De Silva, Sithun - Saxena, Reyansh | Ruy Lopez: Morphy Defense | |
| Feb 18, 2025 | Horne | 1–0 | De Silva | Round 1: Horne, Theo - De Silva, Sithun | Rubinstein Opening | |
| Sep 22, 2024 | De Silva | 1–0 | Ding | 2024 UK Chess Challenge Terafinal Challengers U14 | Sicilian Defense: Najdorf Variation | |
| Sep 22, 2024 | Lapidus | 1–0 | De Silva | 2024 UK Chess Challenge Terafinal Challengers U14 | Scandinavian Defense: Classical Variation | |
| Sep 22, 2024 | Lukhi | ½–½ | De Silva | 2024 UK Chess Challenge Terafinal Challengers U14 | Indian Defense | |
| Sep 22, 2024 | Pereslavtsev | 1–0 | De Silva | 2024 UK Chess Challenge Terafinal Challengers U14 | Semi-Slav Defense | |
| Sep 21, 2024 | De Silva | 1–0 | Patel | 2024 UK Chess Challenge Terafinal Challengers U14 | Caro-Kann Defense: Two Knights Attack, Mindeno Variation | |
| Sep 21, 2024 | De Silva | ½–½ | Ganti | 2024 UK Chess Challenge Terafinal Challengers U14 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Sep 21, 2024 | De Silva | ½–½ | Luk | 2024 UK Chess Challenge Terafinal Challengers U14 | Sicilian Defense: Four Knights Variation, Cobra Variation | |
| Sep 21, 2024 | Mittal | ½–½ | De Silva | 2024 UK Chess Challenge Terafinal Challengers U14 | Scandinavian Defense: Main Line | |
| Aug 3, 2024 | Leung | 1–0 | De Silva | Round 7: Leung, Hao Ran - De Silva, Sithun | English Opening: Caro-Kann Defensive System | |
| Aug 2, 2024 | De Silva | 1–0 | Chapman | Round 6: De Silva, Sithun - Chapman, Luke | French Defense: Rubinstein Variation, Fort Knox Variation | |
| Jul 31, 2024 | De Silva | 1–0 | Lee | Round 4: De Silva, Sithun - Lee, Yuk Hei | Caro-Kann Defense: Tartakower Variation | |
| Jul 29, 2024 | De Silva | 1–0 | Shi | Round 2: De Silva, Sithun - Shi, Shaoquan | Scotch Game: Potter Variation | |
| Jul 28, 2024 | Calvert | 0–1 | De Silva | Round 1: Calvert, George - De Silva, Sithun | French Defense: Advance Variation, Nimzowitsch System | |
| Jul 27, 2024 | De Silva | 1–0 | Pandya | Round 9: De Silva, Sithun - Pandya, Dhairya | Scotch Game: Lolli Variation | |
| Jul 27, 2024 | Chu | 0–1 | De Silva | Round 8: Chu, Edward - De Silva, Sithun | Nimzo-Indian Defense: Three Knights Variation | |
| Jul 27, 2024 | De Silva | ½–½ | Shi | Round 7: De Silva, Sithun - Shi, Shaoquan | Scotch Game: Mieses Variation | |
| Jul 26, 2024 | Ratcliffe | 0–1 | De Silva | Round 6: Ratcliffe, James - De Silva, Sithun | Sicilian Defense: O'Kelly Variation, Normal System | |
| Jul 26, 2024 | De Silva | 0–1 | Chapman | Round 5: De Silva, Sithun - Chapman, Luke | French Defense: Advance Variation, Paulsen Attack | |
| Jul 26, 2024 | Brown | 1–0 | De Silva | Round 4: Brown, John - De Silva, Sithun | French Defense: Exchange Variation, Monte Carlo Variation | |
| Jul 26, 2024 | Xu | 0–1 | De Silva | Round 2: Xu, Jiarui - De Silva, Sithun | French Defense: Exchange Variation | |
| Jul 26, 2024 | De Silva | 1–0 | Luthia | Round 1: De Silva, Sithun - Luthia, Indra Jatin | Scotch Game: Potter Variation | |
| Jul 25, 2024 | Shankar | ½–½ | De Silva | Round 5: Shankar, Yashwardhan - De Silva, Sithun | Indian Defense | |
| Jul 24, 2024 | De Silva | ½–½ | Darker | Round 4: De Silva, Sithun - Darker, Adam | Sicilian Defense: Dragon Variation, Yugoslav Attack, Panov Variation | |
| Jul 24, 2024 | Sai Dheeraj Vadlamudi | 0–1 | De Silva | Round 3: Sai Dheeraj Vadlamudi - De Silva, Sithun | Queen's Pawn Game: Accelerated London System | |
| Jul 23, 2024 | De Silva | ½–½ | Prabhu | Round 2: De Silva, Sithun - Prabhu, Vismith | Sicilian Defense: Four Knights Variation, Exchange Variation | |
| Jul 23, 2024 | De Silva | ½–½ | Kumar | Round 1: De Silva, Sithun - Kumar, Arnav | Caro-Kann Defense: Tartakower Variation | |
| Jul 21, 2024 | De Silva | 0–1 | Cancedda-Dupuis | Round 3: De Silva, Sithun - Cancedda-Dupuis, Livio | Sicilian Defense: O'Kelly Variation, Normal System | |
| Jun 28, 2024 | Mussa | 0–1 | De Silva | Round 5: Mussa, Rayyan - De Silva, Sithun | French Defense: Schlechter Variation | |
| Jun 28, 2024 | De Silva | 1–0 | Roman Rivera | Round 4: De Silva, Sithun - Roman Rivera | Scotch Game: Mieses Variation | |
| Jun 27, 2024 | De Silva | 1–0 | Leon McGuigan-Lazo | Round 3: De Silva, Sithun - Leon McGuigan-Lazo | Sicilian Defense: Kupreichik Variation | |
| Jun 27, 2024 | Pichugov | 1–0 | De Silva | Round 2: Pichugov, Andrey - De Silva, Sithun | Queen's Pawn Game: Accelerated London System | |
| Jun 27, 2024 | Ayaan Quraishi | 0–1 | De Silva | Round 1: Ayaan Quraishi - De Silva, Sithun | French Defense: Knight Variation | |
| Mar 2, 2024 | Baer | 1–0 | De Silva | British Rapidplay Championship 2024 | King's Indian Attack: Wahls Defense | |
| Mar 2, 2024 | De Silva | ½–½ | Herring | British Rapidplay Championship 2024 | Caro-Kann Defense: Tartakower Variation | |
| Mar 2, 2024 | Keshari | 0–1 | De Silva | British Rapidplay - lower boards | Queen's Pawn Game | |
| Mar 2, 2024 | De Silva | 0–1 | Waldhausen Gordon | British Rapidplay Championship 2024 | King's Indian Attack: Symmetrical Defense | |
| Mar 2, 2024 | Arun | 0–1 | De Silva | British Rapidplay - lower boards | French Defense: Exchange Variation, Monte Carlo Variation | |
| Mar 2, 2024 | De Silva | 0–1 | Mikalajunas | British Rapidplay Championship 2024 | Caro-Kann Defense: Tartakower Variation | |
| Aug 18, 2024 | De Silva | 0–1 | Sooraj M R | Round 5: De Silva, Sithun - Sooraj M R | Alekhine Defense: Modern Variation, Alburt Variation | |
| Aug 18, 2024 | Longson | 0–1 | De Silva | Round 4: Longson, Sarah N - De Silva, Sithun | Scandinavian Defense: Classical Variation | |
| Aug 17, 2024 | De Silva | 1–0 | Clucas | Round 3: De Silva, Sithun - Clucas, Reg P | Sicilian Defense: Dragon Variation | |
| Aug 17, 2024 | Burke | ½–½ | De Silva | Round 2: Burke, Alex - De Silva, Sithun | Scandinavian Defense: Main Line | |
| Aug 16, 2024 | De Silva | ½–½ | Norris | Round 1: De Silva, Sithun - Norris, Ethan | Sicilian Defense: O'Kelly Variation, Maróczy Bind, Robatsch Line | |
| Aug 1, 2024 | Grose | 1–0 | De Silva | Round 5: Grose, Kameron - De Silva, Sithun | French Defense: Tarrasch Variation, Chistyakov Defense, Modern Line | |
| Jul 30, 2024 | Zhu | 1–0 | De Silva | Round 3: Zhu, Pengxiao - De Silva, Sithun | Nimzo-Indian Defense: Classical Variation | |
| Sep 10, 2023 | De Silva | ½–½ | Balmond | 2023 UK Chess Challenge Terafinal Challengers U12 | Ruy Lopez: Closed, Averbakh Variation | |
| Sep 10, 2023 | De Silva | ½–½ | Pereslavtsev | 2023 UK Chess Challenge Terafinal Challengers U12 | Sicilian Defense: Kan Variation, Wing Attack | |
| Sep 10, 2023 | Hazell | 0–1 | De Silva | 2023 UK Chess Challenge Terafinal Challengers U12 | Queen's Gambit Declined | |
| Sep 10, 2023 | Steiners | 1–0 | De Silva | 2023 UK Chess Challenge Terafinal Challengers U12 | Nimzo-Indian Defense: Rubinstein System | |
| Sep 9, 2023 | De Silva | 0–1 | Murawski | 2023 UK Chess Challenge Terafinal Challengers U12 | Ruy Lopez: Berlin Defense, Rio Gambit Accepted | |
| Sep 9, 2023 | Ranasinghe | 0–1 | De Silva | 2023 UK Chess Challenge Terafinal Challengers U12 | Queen's Pawn Game: Accelerated London System | |
| Sep 9, 2023 | Wang | 1–0 | De Silva | 2023 UK Chess Challenge Terafinal Challengers U12 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jul 29, 2023 | De Silva | 1–0 | Pereslavtsev | British Championships: Junior Under 12 | Sicilian Defense: Najdorf Variation | |
| Jul 28, 2023 | De Silva | ½–½ | Sefton | British Championships: Junior Under 12 | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Jul 28, 2023 | Gill | 0–1 | De Silva | British Championships: Junior Under 12 | French Defense: Steiner Variation | |
| Jul 27, 2023 | Ranasinghe | 0–1 | De Silva | British Championships: Junior Under 12 | Queen's Pawn Game: Accelerated London System | |
| Jul 26, 2023 | De Silva | ½–½ | Sui | British Championships: Junior Under 12 | French Defense: Advance Variation, Wade Variation | |
| Jan 22, 2023 | De Silva | ½–½ | Neenan | 29th 4NCL OTB Congress | Nimzo-Larsen Attack: Indian Variation | |
| Jan 22, 2023 | Kenning | ½–½ | De Silva | 29th 4NCL OTB Congress | Rapport-Jobava System | |
| Jan 21, 2023 | De Silva | 1–0 | Murphy | 29th 4NCL Congress | Nimzo-Larsen Attack: Indian Variation | |
| Jan 20, 2023 | Procter | 1–0 | De Silva | 29th 4NCL Congress | Indian Defense | |
| — | De Silva | ½–½ | Potter | Round 2: De Silva, Sithun - Potter, John M | Pirc Defense: Sveshnikov System | |
| — | De Silva | ½–½ | Steiners | Round 2: De Silva, Sithun - Steiners, Emils | Queen's Gambit Declined | |
| — | De Silva | 1–0 | Davis | Round 4: De Silva, Sithun - Davis, Cameron | French Defense: Tarrasch Variation, Guimard Defense, Main Line | |
| — | De Silva | ½–½ | Kendall | Round 4: De Silva, Sithun - Kendall, Arthur | French Defense: Tarrasch Variation, Closed Variation, Main Line | |
| — | De Silva | 0–1 | Savage | Round 6: De Silva, Sithun - Savage, Andrew | Alekhine Defense: Exchange Variation | |
| — | De Silva | 1–0 | Gomez | Round 6: De Silva, Sithun - Gomez, Hal | Indian Defense: Anti-Nimzo-Indian | |