| May 4, 2026 | Han | ½–½ | Siva Mahadevan | Round 11: Han, Yichen - Siva Mahadevan | Queen's Gambit Declined: Tartakower Defense | |
| May 3, 2026 | Siva Mahadevan | 0–1 | Gormally | Round 10: Siva Mahadevan - Gormally, Daniel W | Sicilian Defense: Najdorf Variation | |
| May 2, 2026 | Bazakutsa | ½–½ | Siva Mahadevan | Round 9: Bazakutsa, Svyatoslav - Siva Mahadevan | English Opening: Symmetrical Variation, Anti-Benoni Variation | |
| Apr 6, 2026 | Siva Mahadevan | 1–0 | Molitor | Round 9: Siva Mahadevan - Molitor, Milo | ? | |
| Apr 6, 2026 | Vokhidov | 1–0 | Siva Mahadevan | Round 8: Vokhidov, Shamsiddin - Siva Mahadevan | ? | |
| Apr 5, 2026 | Siva Mahadevan | 1–0 | Agrest | Round 7: Siva Mahadevan - Agrest, Inna | ? | |
| Apr 5, 2026 | Heimrath | 0–1 | Siva Mahadevan | Round 6: Heimrath, Reiner - Siva Mahadevan | ? | |
| Apr 4, 2026 | Siva Mahadevan | 0–1 | Wyss | Round 5: Siva Mahadevan - Wyss, Jonas | ? | |
| Apr 4, 2026 | Federer | 1–0 | Siva Mahadevan | Grenke Chess Festival 2026 Open | Sicilian Defense: Najdorf Variation, English Attack | |
| Apr 3, 2026 | Siva Mahadevan | ½–½ | Nguyen | Grenke Chess Festival 2026 Open | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Apr 3, 2026 | Gramb | 0–1 | Siva Mahadevan | Grenke Chess Festival 2026 Open | English Opening: Neo-Catalan | |
| Apr 2, 2026 | Siva Mahadevan | 1–0 | Trenz | Grenke Chess Festival 2026 Open | Caro-Kann Defense: Breyer Variation | |
| Mar 31, 2026 | Siva Mahadevan | ½–½ | Brzezina | Reykjavik Open 2026 | Sicilian Defense: Moscow Variation | |
| Mar 30, 2026 | Sterck | ½–½ | Siva Mahadevan | Reykjavik Open 2026 | Sicilian Defense: Moscow Variation | |
| Mar 29, 2026 | Wall | 0–1 | Siva Mahadevan | Reykjavik Open 2026 | Rapport-Jobava System | |
| Mar 28, 2026 | Siva Mahadevan | 0–1 | Zhou | Reykjavik Open 2026 | Sicilian Defense: Godiva Variation | |
| Mar 28, 2026 | Siva Mahadevan | 1–0 | Moor | Reykjavik Open 2026 | French Defense: Advance Variation, Euwe Variation | |
| Mar 27, 2026 | Andersen | ½–½ | Siva Mahadevan | Reykjavik Open 2026 | Ruy Lopez: Closed, Anti-Marshall | |
| Mar 26, 2026 | Siva Mahadevan | ½–½ | Ivanchuk | Reykjavik Open 2026 | Scotch Game: Scotch Gambit, Advance Variation | |
| Mar 26, 2026 | Fossheim | 0–1 | Siva Mahadevan | Reykjavik Open 2026 | Vienna Game: Anderssen Defense | |
| Mar 25, 2026 | Siva Mahadevan | 1–0 | Mensing | Reykjavik Open 2026 | Sicilian Defense: Najdorf Variation | |
| Mar 21, 2026 | Siva Mahadevan | 1–0 | Banerjee | Round 7: Siva Mahadevan - Banerjee, Supratit | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Mar 15, 2026 | Adams | 0–1 | Siva Mahadevan | Round 11: Adams, Michael - Siva Mahadevan | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| Mar 15, 2026 | Kanyamarala | ½–½ | Siva Mahadevan | Round 10: Kanyamarala, Trisha - Siva Mahadevan | Queen's Pawn Game: Colle System | |
| Mar 15, 2026 | Siva Mahadevan | ½–½ | Banerjee | Round 9: Siva Mahadevan - Banerjee, Supratit | French Defense: Advance Variation, Euwe Variation | |
| Mar 15, 2026 | Royal | ½–½ | Siva Mahadevan | Round 8: Royal, Shreyas - Siva Mahadevan | Réti Opening: Anglo-Slav Variation, Gurevich System | |
| Mar 15, 2026 | Siva Mahadevan | 1–0 | Hanley | Round 7: Siva Mahadevan - Hanley, Craig A | Sicilian Defense: O'Kelly Variation, Venice System | |
| Mar 14, 2026 | Bathula | 0–1 | Siva Mahadevan | Round 6: Bathula, Abhinav Reddy - Siva Mahadevan | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Mar 14, 2026 | Deepak Ambattu | 0–1 | Siva Mahadevan | Round 4: Deepak Ambattu, Rithvik - Siva Mahadevan | Pseudo Queen's Indian Defense | |
| Mar 14, 2026 | Siva Mahadevan | 1–0 | Kovalskyi | Round 3: Siva Mahadevan - Kovalskyi, Roman | Queen's Pawn Game: Krause Variation | |
| Mar 14, 2026 | Sanada | 0–1 | Siva Mahadevan | Round 2: Sanada, Tetsuaki - Siva Mahadevan | Queen's Pawn Game: Chigorin Variation | |
| Mar 14, 2026 | Siva Mahadevan | 1–0 | Sahoo | Round 1: Siva Mahadevan - Sahoo, Shivam | King's Indian Attack: Symmetrical Defense | |
| Mar 12, 2026 | Siva Mahadevan | 0–1 | Maroroa Jones | Round 5: Siva Mahadevan - Maroroa Jones, Gawain C B | Philidor Defense: Lion Variation | |
| Feb 8, 2026 | Fodor | 0–1 | Siva Mahadevan | Round 6: Fodor, Tamas Jr. - Siva Mahadevan | Semi-Slav Defense: Accelerated Move Order | |
| Feb 7, 2026 | Siva Mahadevan | ½–½ | Maroroa Jones | Round 5: Siva Mahadevan - Maroroa Jones, Gawain C B | Sicilian Defense: Kalashnikov Variation | |
| Jan 11, 2026 | Siva Mahadevan | 0–1 | Parker | Round 4: Siva Mahadevan - Parker, Jonathan F | Ruy Lopez: Closed, Breyer Defense, Zaitsev Hybrid | |
| Jan 4, 2026 | Siva Mahadevan | 1–0 | Sengupta | Round 8: Siva Mahadevan - Sengupta, Deep | French Defense: Advance Variation, Euwe Variation | |
| Jan 3, 2026 | Siva Mahadevan | 1–0 | Bauer | Round 7: Siva Mahadevan - Bauer, Christian | Sicilian Defense: Godiva Variation | |
| Jan 2, 2026 | Hammer | 0–1 | Siva Mahadevan | Round 6: Hammer, Jon Ludvig - Siva Mahadevan | Sicilian Defense: Richter-Rauzer Variation, Vitolins Variation | |
| Dec 28, 2025 | Kacprzak | ½–½ | Siva Mahadevan | Round 2: Kacprzak, Kacper - Siva Mahadevan | Ruy Lopez: Closed, Anti-Marshall | |
| Dec 23, 2025 | Xu | ½–½ | Siva Mahadevan | Round 9: Xu, Xiangyu - Siva Mahadevan | Slav Defense: Exchange Variation, Symmetrical Line | |
| Dec 7, 2025 | Siva Mahadevan | ½–½ | Gordon | Round 10: Siva Mahadevan - Gordon, Stephen J | Caro-Kann Defense: Advance Variation, Short Variation | |
| Dec 7, 2025 | Dominguez Perez | 1–0 | Siva Mahadevan | Round 9: Dominguez Perez, Leinier - Siva Mahadevan | Ruy Lopez: Closed, Flohr System | |
| Dec 7, 2025 | Siva Mahadevan | 1–0 | Mikhalevski | Round 8: Siva Mahadevan - Mikhalevski, Victor | Ruy Lopez: Morphy Defense, Norwegian Variation | |
| Dec 7, 2025 | Siva Mahadevan | 1–0 | Rendle | Round 7: Siva Mahadevan - Rendle, Thomas E | French Defense: Tarrasch Variation, Morozevich Variation | |
| Dec 6, 2025 | Batchelor | 0–1 | Siva Mahadevan | Round 5: Batchelor, Mark - Siva Mahadevan | King's Indian Defense: Orthodox Variation, Positional Defense, Closed Line | |
| Dec 6, 2025 | Siva Mahadevan | 1–0 | Silva | Round 4: Siva Mahadevan - Silva, Lourenco Santa Clara | Torre Attack: Classical Defense | |
| Dec 6, 2025 | Maroroa Jones | 1–0 | Siva Mahadevan | Round 3: Maroroa Jones, Gawain C B - Siva Mahadevan | Sicilian Defense: Closed, Traditional | |
| Dec 6, 2025 | Jain | 0–1 | Siva Mahadevan | Round 2: Jain, Gautam - Siva Mahadevan | Three Knights Opening: Steinitz Defense | |
| Dec 6, 2025 | Siva Mahadevan | 1–0 | Islam | Round 1: Siva Mahadevan - Islam, Mohammed | Ruy Lopez: Closed, Flohr System | |
| Dec 3, 2025 | Travadon | ½–½ | Siva Mahadevan | Round 9: Travadon, Loic - Siva Mahadevan | Sicilian Defense: Classical Variation, Anti-Sozin Variation | |
| Dec 2, 2025 | Siva Mahadevan | 1–0 | Houska | Round 8: Siva Mahadevan - Houska, Jovanka | Caro-Kann Defense: Advance Variation, Short Variation | |
| Dec 1, 2025 | Kazarian | ½–½ | Siva Mahadevan | Round 7: Kazarian, Anna-Maja - Siva Mahadevan | Three Knights Opening: Steinitz Defense | |
| Nov 30, 2025 | Siva Mahadevan | 0–1 | Kraemer | Round 6: Siva Mahadevan - Kraemer, Martin | Ruy Lopez: Closed, Anti-Marshall | |
| Nov 30, 2025 | Siva Mahadevan | 1–0 | Vijayakumar | Round 5: Siva Mahadevan - Vijayakumar, Rishi | Queen's Gambit Declined: Normal Defense | |
| Nov 29, 2025 | Panjer | 0–1 | Siva Mahadevan | Round 4: Panjer, Sidney - Siva Mahadevan | Bogo-Indian Defense: Retreat Variation | |
| Nov 28, 2025 | Kovalskyi | 0–1 | Siva Mahadevan | Round 3: Kovalskyi, Roman - Siva Mahadevan | Italian Game: Paris Defense | |
| Nov 28, 2025 | Panda | 1–0 | Siva Mahadevan | Round 2: Panda, Barnabas - Siva Mahadevan | Queen's Pawn Game | |
| Nov 27, 2025 | Siva Mahadevan | ½–½ | Kanyamarala | Round 1: Siva Mahadevan - Kanyamarala, Trisha | Sicilian Defense: Taimanov Variation | |
| Nov 22, 2025 | Collins | 0–1 | Siva Mahadevan | Round 15: Collins, Adam - Siva Mahadevan | Sicilian Defense: Richter-Rauzer Variation, Classical Variation | |
| Nov 22, 2025 | Siva Mahadevan | 1–0 | Maroroa Jones | Round 14: Siva Mahadevan - Maroroa Jones, Gawain C B | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| Nov 22, 2025 | Gasanov | 0–1 | Siva Mahadevan | Round 13: Gasanov, Eldar - Siva Mahadevan | King's Indian Defense: Averbakh Variation, Modern Defense | |
| Nov 22, 2025 | Siva Mahadevan | 1–0 | Banerjee | Round 12: Siva Mahadevan - Banerjee, Supratit | Modern Defense | |
| Nov 22, 2025 | Balaji | 0–1 | Siva Mahadevan | Round 11: Balaji, Aaravamudhan - Siva Mahadevan | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Nov 22, 2025 | Siva Mahadevan | 0–1 | Wells | Round 10: Siva Mahadevan - Wells, Peter K | Sicilian Defense: Richter-Rauzer Variation, Classical Variation | |
| Nov 22, 2025 | Kozusek | 0–1 | Siva Mahadevan | Round 9: Kozusek, Daniel - Siva Mahadevan | Semi-Slav Defense | |
| Nov 22, 2025 | Siva Mahadevan | 0–1 | Badacsonyi | Round 8: Siva Mahadevan - Badacsonyi, Stanley | French Defense: Tarrasch Variation, Closed Variation | |
| Nov 22, 2025 | Bazakutsa | ½–½ | Siva Mahadevan | Round 6: Bazakutsa, Svyatoslav - Siva Mahadevan | Nimzo-Larsen Attack: Modern Variation | |
| Nov 22, 2025 | Siva Mahadevan | 1–0 | Ganti | Round 5: Siva Mahadevan - Ganti, Shriaansh | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation | |
| Nov 22, 2025 | Waldhausen Gordon | 0–1 | Siva Mahadevan | Round 4: Waldhausen Gordon, Frederick - Siva Mahadevan | Nimzo-Larsen Attack: Classical Variation | |
| Nov 22, 2025 | Siva Mahadevan | 1–0 | Czopor | Round 3: Siva Mahadevan - Czopor, Maciej | Sicilian Defense: Taimanov Variation | |
| Nov 22, 2025 | Gormally | 1–0 | Siva Mahadevan | Round 2: Gormally, Daniel W - Siva Mahadevan | Sicilian Defense: Closed, Traditional | |
| Nov 22, 2025 | Siva Mahadevan | 0–1 | Vijayakumar | Round 1: Siva Mahadevan - Vijayakumar, Rishi | Neo-Grünfeld Defense: Classical Variation, Modern Defense | |
| Nov 16, 2025 | Siva Mahadevan | 0–1 | D`Costa | Round 7: Siva Mahadevan - D`Costa, Lorin | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| Nov 2, 2025 | Siva Mahadevan | ½–½ | Gallana | Round 2: Siva Mahadevan - Gallana, Marco | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation | |
| Nov 1, 2025 | Roberson | 0–1 | Siva Mahadevan | Round 1: Roberson, Peter T - Siva Mahadevan | Catalan Opening: Open Defense, Classical Line | |
| Oct 28, 2025 | Siva Mahadevan | 1–0 | Pilley | Round 9: Siva Mahadevan - Pilley, Jack | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Oct 28, 2025 | Siva Mahadevan | 1–0 | Dicen | Round 8: Siva Mahadevan - Dicen, Elis Denele | Sicilian Defense: Old Sicilian | |
| Oct 28, 2025 | Harikrishnan.A.Ra | 0–1 | Siva Mahadevan | Round 7: Harikrishnan.A.Ra - Siva Mahadevan | Queen's Pawn Game: London System | |
| Oct 28, 2025 | Siva Mahadevan | 1–0 | Wang | Round 6: Siva Mahadevan - Wang, Hao(ZJ) | Ruy Lopez: Morphy Defense, Classical Defense Deferred | |
| Oct 28, 2025 | Rami | ½–½ | Siva Mahadevan | Round 5: Rami,Talab - Siva Mahadevan | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Oct 28, 2025 | Brett | 0–1 | Siva Mahadevan | Round 3: Brett, Andrew R - Siva Mahadevan | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Oct 28, 2025 | Siva Mahadevan | 1–0 | Baer | Round 2: Siva Mahadevan - Baer, Bruce L | Queen's Pawn Game: Modern Defense | |
| Oct 28, 2025 | Miller | 0–1 | Siva Mahadevan | 2025 Coventry International - Blitz | Queen's Pawn Game: Colle System | |
| Oct 27, 2025 | Kovchan | ½–½ | Siva Mahadevan | Round 8: Kovchan, Alexander - Siva Mahadevan | Sicilian Defense: Boleslavsky Variation | |
| Oct 27, 2025 | Royal | 1–0 | Siva Mahadevan | Round 3: Royal, Shreyas - Siva Mahadevan | Semi-Slav Defense | |
| Oct 27, 2025 | Siva Mahadevan | 0–1 | Plat | Round 4: Siva Mahadevan - Plat, Vojtech | Pirc Defense | |
| May 31, 2025 | Siva Mahadevan | 0–1 | Clarke | Round 9: Siva Mahadevan - Clarke, Brandon G I | Sicilian Defense: Dragon Variation, Yugoslav Attack, Early Deviations | |
| May 30, 2025 | Siva Mahadevan | ½–½ | Ghasi | Round 8: Siva Mahadevan - Ghasi, Ameet K | Caro-Kann Defense: Advance Variation, Short Variation | |
| May 30, 2025 | Cuenca Jimenez | 0–1 | Siva Mahadevan | Round 7: Cuenca Jimenez, Jose Fernando - Siva Mahadevan | Semi-Slav Defense: Noteboom Variation | |
| May 26, 2025 | Siva Mahadevan | 1–0 | Payne | Round 1: Siva Mahadevan - Payne, Matthew J | French Defense: Advance Variation, Main Line | |
| May 25, 2025 | Adams | 1–0 | Siva Mahadevan | Round 6: Adams, Michael - Siva Mahadevan | Sicilian Defense: Moscow Variation | |
| May 25, 2025 | Siva Mahadevan | ½–½ | Ladron De Guevara Pinto | Round 5: Siva Mahadevan - Ladron De Guevara Pinto, Paolo | Ruy Lopez: Closed, Breyer Defense, Quiet Variation | |
| May 25, 2025 | Fernandez | 0–1 | Siva Mahadevan | Round 4: Fernandez, Daniel Howard - Siva Mahadevan | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit | |
| May 25, 2025 | Siva Mahadevan | 1–0 | Kalavannan | Round 3: Siva Mahadevan - Kalavannan, Koby | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| May 25, 2025 | Bosiocic | 0–1 | Siva Mahadevan | Round 2: Bosiocic, Marin - Siva Mahadevan | Sicilian Defense: Classical Variation | |
| May 5, 2025 | Richardson | 0–1 | Siva Mahadevan | Round 11: Richardson, John R - Siva Mahadevan | Semi-Slav Defense: Anti-Moscow Gambit | |
| May 4, 2025 | Siva Mahadevan | 1–0 | Gallana | Round 10: Siva Mahadevan - Gallana, Marco | Sicilian Defense: Moscow Variation, Main Line | |
| May 3, 2025 | Siva Mahadevan | 1–0 | Longson | Round 9: Siva Mahadevan - Longson, Alexander | Ruy Lopez: Closed, Chigorin Defense | |
| Apr 21, 2025 | Siva Mahadevan | 1–0 | Hebden | Round 7: Siva Mahadevan - Hebden, Mark L | King's Indian Defense: Sämisch Variation, Sämisch Gambit | |