 
                                    | Fecha | Jugadores & Apertura | Resultado | ECO | Ver | 
|---|---|---|---|---|
| 2019.07.21 | Peramunetilleke, Seth (1408 ) vs (1815) Madrid Sole, Antonio XXI Obert Internacional Sant Martí 2019 Francesa - Spielmann | 1-0 | C00 | |
| 2019.07.20 | Peramunetilleke, Seth (1408 ) vs (1784) Corominas Garrido, Jordi XXI Obert Internacional Sant Martí 2019 Francesa - Spielmann | 1-0 | C00 | |
| 2019.07.19 | Farre Buil, Carles (1772 ) vs (1408) Peramunetilleke, Seth XXI Obert Internacional Sant Martí 2019 Semi-Eslava - Anti-Merano | 0-1 | D43 | |
| 2019.07.18 | Peramunetilleke, Seth (1408 ) vs (1856) Costa Trave, Jaume XXI Obert Internacional Sant Martí 2019 Francesa - Spielmann | 0-1 | C00 | |
| 2019.07.17 | Sumelzo Lozano, Jose (1870 ) vs (1408) Peramunetilleke, Seth XXI Obert Internacional Sant Martí 2019 Petrov - India | 1/2-1/2 | C42 | |
| 2019.07.16 | Peramunetilleke, Seth (1408 ) vs (1879) Cornejo Vera, Danilo XXI Obert Internacional Sant Martí 2019 Siciliana Alapin | 1/2-1/2 | B22 | |
| 2019.07.15 | Pujal Moncho, Joaquim (1797 ) vs (1408) Peramunetilleke, Seth XXI Obert Internacional Sant Martí 2019 Peón de Dama | 0-1 | D00 | |
| 2019.07.14 | Peramunetilleke, Seth (1408 ) vs (1807) Corominas Garrido, Antonio XXI Obert Internacional Sant Martí 2019 Caro-Kann del Cambio | 1/2-1/2 | B13 | |
| 2019.07.13 | Garcia Clemente, Julian Fco. (1813 ) vs (1408) Peramunetilleke, Seth XXI Obert Internacional Sant Martí 2019 Eslava | 0-1 | D10 | |
| 2018.01.14 | Liu, Max Yuan vs (1379) Peramunetilleke, Seth Hong Kong National Junior Chess Championship 2018 Petrov - Kaufmann | 0-1 | C42 | |
| 2018.01.14 | Peramunetilleke, Seth (1379 ) vs (1264) Du, Zongrui Hong Kong National Junior Chess Championship 2018 Siciliana Alapin | 0-1 | B22 | |
| 2018.01.13 | Deng, Yu Dong Michael (1821 ) vs (1379) Peramunetilleke, Seth Hong Kong National Junior Chess Championship 2018 India de Dama Fiancheto - Nimzovich | 1/2-1/2 | E15 | |
| 2018.01.13 | Peramunetilleke, Seth (1379 ) vs (1044) Wu, Shu Hong Hong Kong National Junior Chess Championship 2018 Giuoco Piano - Greco (Moller) | 1-0 | C54 | |
| 2018.01.13 | Kwok, Hiu Nok Taylor (1068 ) vs (1379) Peramunetilleke, Seth Hong Kong National Junior Chess Championship 2018 Eslava | 0-1 | D10 | |
| 2017.11.12 | Peramunetilleke, Seth (1386 ) vs Chang, Nathan The Chess Academy ActiveKids Fall Open 2017 (Rated Standard) Philidor | 1-0 | C41 | |
| 2017.11.05 | Ho, In Hei Henry (1768 ) vs (1386) Peramunetilleke, Seth The Chess Academy ActiveKids Fall Open 2017 (Rated Standard) Petrov - Tres Caballos | 1-0 | C42 | |
| 2017.10.29 | Peramunetilleke, Seth (1386 ) vs (1371) Dai, Andrew Sicheng The Chess Academy ActiveKids Fall Open 2017 (Rated Standard) Escandinava | 1-0 | B01 | |
| 2017.10.22 | Peramunetilleke, Seth (1386 ) vs (1990) Leung, Ho Yan Andrew The Chess Academy ActiveKids Fall Open 2017 (Rated Standard) Siciliana Juego del Centro - Smith-Morra | 0-1 | B21 | |
| 2017.10.08 | Yan, Joseph (1328 ) vs (1386) Peramunetilleke, Seth The Chess Academy ActiveKids Fall Open 2017 (Rated Standard) Peón de Dama Zukertort - Londres | 0-1 | D02 | |
| 2017.01.22 | Peramunetilleke, Seth vs (1394) Hu, Yik Kwan CAISSA Hong Kong National Junior Chess Championships 2017 Caro-Kann del Cambio | 0-1 | B13 | |
| 2017.01.22 | Peramunetilleke, Seth vs (1088) Pang, Bo CAISSA Hong Kong National Junior Chess Championships 2017 Dos Caballos - Blackburne | 1-0 | C58 | |
| 2017.01.22 | Fung, Wilbert vs Peramunetilleke, Seth CAISSA Hong Kong National Junior Chess Championships 2017 Peón de Dama Zukertort - Londres | 0-1 | D02 | |
| 2017.01.21 | Peramunetilleke, Seth vs Yin, Richard CAISSA Hong Kong National Junior Chess Championships 2017 Giuoco Piano - Greco (Aitken) | 0-1 | C54 | |
| 2017.01.21 | Yeung, Lok Yan Michelle vs Peramunetilleke, Seth CAISSA Hong Kong National Junior Chess Championships 2017 Italiana | 0-1 | C50 | |
| 2017.01.21 | Peramunetilleke, Seth vs (1337) Bao, Jin Wen CAISSA Hong Kong National Junior Chess Championships 2017 Siciliana Juego del Centro - Smith-Morra | 1/2-1/2 | B21 | |
| 2017.01.21 | King, Alistair (1264 ) vs Peramunetilleke, Seth CAISSA Hong Kong National Junior Chess Championships 2017 Eslava de los Dos Caballos | 0-1 | D15 | 
| Fecha | Jugadores & Apertura | Resultado | ECO | Ver | 
|---|---|---|---|---|
| 2025.06.09 | Peramunetilleke,Seth (2010) vs (1959) Anup Kumar,Vihaan NSW Open 2025 Petrov Moderna - Simétrica | 1-0 | C43 | |
| 2025.06.09 | Lo,Willis (2064) vs (2010) Peramunetilleke,Seth NSW Open 2025 Peón de Dama Zukertort - Londres | 1/2-1/2 | D02 | |
| 2025.06.07 | Peramunetilleke,Seth (2010) vs (1956) Vincent,Alaina NSW Open 2025 Siciliana Alapin - Smith-Morra | 0-1 | B22 | |
| 2023.01.24 | Peramunetilleke,Seth (1841) vs (2405) Bjelobrk,I Oceania Zonal 2023 Siciliana Alapin - Smith-Morra | 1/2-1/2 | B22 | |
| 2022.06.11 | Peramunetilleke,Savin Kavindu (1496) vs (2332) Lane,G NSW Open 2022 Cuatro Caballos - Escocesa | 0-1 | C47 |