| 16 jul 2026 | Miezis, Normunds 2411 | Heino, Pessi 2160 | 1-0 | A21 Apertura Inglesa: King's English Variation, Reversed Sicilian | XXXIV Heart of Finland Open | 24 | Ver |
| 16 jul 2026 | Heino, Pessi 2160 | Koykka, Pekka 2323 | 0-1 | B01 Defensa Escandinava: Gubinsky-Melts Defense | XXXIV Heart of Finland Open | 43 | Ver |
| 15 jul 2026 | Seiger, Vidar 2287 | Heino, Pessi 2160 | 0-1 | A37 Apertura Inglesa: Symmetrical Variation, Three Knights, Fianchetto Variation | XXXIV Heart of Finland Open | 49 | Ver |
| 14 jul 2026 | Heino, Pessi 2160 | Pultinevicius, Paulius 2565 | 0-1 | B47 Defensa Siciliana: Taimanov Variation, Bastrikov Variation | XXXIV Heart of Finland Open | 38 | Ver |
| 14 dic 2025 | Vesa, Mikke 2099 | Heino, Pessi 2196 | ½-½ | C02 Defensa Francesa: Advance Variation, Euwe Variation | Finnish Youth Chess Championship Finland 2026 | U16 | 35 | Ver |
| 14 dic 2025 | Heino, Pessi 2196 | Asikainen, Eeli 2076 | ½-½ | C70 Apertura Española (Ruy López): Morphy Defense, Classical Defense Deferred | Finnish Youth Chess Championship Finland 2026 | U16 | 46 | Ver |
| 5 oct 2025 | Efimov, Leonid 2347 | Heino, Pessi 2201 | ½-½ | E11 Defensa Bogoindia: Nimzowitsch Variation | FIDE World Youth Chess Championships 2025 | Open U16 | 54 | Ver |