| 18 jun 2026 | Panesar Vedant 2448 | Kaustuv, Kundu 2323 | 1-0 | B36 Defensa Siciliana: Accelerated Dragon, Maróczy Bind | 360 ONE MASTERS CHESS TOURNAMENT 2026 | 67 | Ver |
| 17 jun 2026 | Borgaonkar Akshay 2380 | Kaustuv, Kundu 2323 | ½-½ | B34 Defensa Siciliana: Accelerated Dragon, Modern Variation | 360 ONE MASTERS CHESS TOURNAMENT 2026 | 24 | Ver |
| 16 jun 2026 | Kaustuv, Kundu 2323 | Daaevik Wadhawan 2356 | 1-0 | A07 King's Indian Attack, with e6 | 360 ONE MASTERS CHESS TOURNAMENT 2026 | 51 | Ver |
| 15 jun 2026 | Omelja, Artem 2397 | Kaustuv, Kundu 2323 | ½-½ | E39 Defensa Nimzoindia: Classical Variation, Berlin Variation, Pirc Variation | 360 ONE MASTERS CHESS TOURNAMENT 2026 | 67 | Ver |
| 13 jun 2026 | Sammed Jaykumar, Shete 2400 | Kaustuv, Kundu 2323 | 1-0 | E73 Defensa India de Rey: Semi-Averbakh System | 360 ONE MASTERS CHESS TOURNAMENT 2026 | 49 | Ver |
| 12 jun 2026 | Kaustuv, Kundu 2323 | Ayush Sharma 2440 | 0-1 | A08 Ataque Indio de Rey: Sicilian Variation | 360 ONE MASTERS CHESS TOURNAMENT 2026 | 40 | Ver |
| 11 jun 2026 | Soham Kamotra 2405 | Kaustuv, Kundu 2323 | ½-½ | E73 Defensa India de Rey: Averbakh Variation, Modern Defense | 360 ONE MASTERS CHESS TOURNAMENT 2026 | 51 | Ver |
| 10 jun 2026 | Kaustuv, Kundu 2323 | Gorovets, Andrey 2427 | 1-0 | D33 Defensa Tarrasch: Dubov Tarrasch | 360 ONE MASTERS CHESS TOURNAMENT 2026 | 47 | Ver |
| 30 may 2026 | Kaustuv, Kundu 2335 | Harsh Suresh 2435 | ½-½ | A07 King's Indian Attack, with e6 | 17th kiit international chess festival-2026 CAT A | 37 | Ver |
| 28 may 2026 | Sriram Adarsh Uppala 2465 | Kaustuv, Kundu 2335 | 1-0 | E92 Defensa India de Rey: Petrosian Variation, Stein Defense | 17th kiit international chess festival-2026 CAT A | 69 | Ver |
| 27 may 2026 | Kaustuv, Kundu 2335 | Sethuraman, S.P. 2551 | ½-½ | A04 Apertura Zukertort: Kingside Fianchetto | 17th kiit international chess festival-2026 CAT A | 34 | Ver |
| 27 may 2026 | Ayush Sharma 2427 | Kaustuv, Kundu 2335 | 0-1 | B40 Defensa Siciliana: Delayed Alapin Variation, with e6 | 17th kiit international chess festival-2026 CAT A | 28 | Ver |
| 26 may 2026 | Kaustuv, Kundu 2335 | Aleksandrov, Aleksej 2433 | ½-½ | A05 Ataque Indio de Rey: Spassky Variation | 17th kiit international chess festival-2026 CAT A | 34 | Ver |
| 25 may 2026 | Chanda, Sandipan 2484 | Kaustuv, Kundu 2335 | 0-1 | D01 Rapport-Jobava System | 17th kiit international chess festival-2026 CAT A | 42 | Ver |
| 13 mar 2026 | Kaustuv, Kundu 2188 | Mitrabha, Guha 2533 | 0-1 | A15 Apertura Inglesa: Anglo-Indian Defense, Queen's Indian Formation | India National Blitz Chess Championship 2025-26 | 40 | Ver |
| 13 mar 2026 | Karthikeyan, Murali 2521 | Kaustuv, Kundu 2188 | 1-0 | B30 Defensa Siciliana: Old Sicilian | India National Blitz Chess Championship 2025-26 | 100 | Ver |
| 13 mar 2026 | Kaustuv, Kundu 2188 | Arjun Kalyan 2454 | 1-0 | C54 Apertura Italiana: Classical Variation, Giuoco Pianissimo | India National Blitz Chess Championship 2025-26 | 45 | Ver |
| 13 mar 2026 | Iniyan, Pa 2447 | Kaustuv, Kundu 2188 | 0-1 | E73 Defensa India de Rey: Semi-Averbakh System | India National Blitz Chess Championship 2025-26 | 42 | Ver |
| 12 mar 2026 | Kaustuv, Kundu 2238 | Hari Madhavan N B 2312 | 0-1 | A13 Apertura Inglesa: Agincourt Defense | India National Rapid Chess Championship 2025-26 | 36 | Ver |
| 12 mar 2026 | Kaustuv, Kundu 2238 | Kshatriya Nitin Vekhande 2051 | 1-0 | A14 Apertura Inglesa: Agincourt Defense, Neo-Catalan Declined | India National Rapid Chess Championship 2025-26 | 49 | Ver |