| Jul 16, 2026 | Miezis | 1–0 | Heino | Round 7: Miezis, Normunds - Heino, Pessi | English Opening: King's English Variation, Reversed Sicilian | |
| Jul 16, 2026 | Heino | 0–1 | Koykka | Round 6: Heino, Pessi - Koykka, Pekka | Scandinavian Defense: Gubinsky-Melts Defense | |
| Jul 15, 2026 | Seiger | 0–1 | Heino | Round 5: Seiger, Vidar - Heino, Pessi | English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation | |
| Jul 14, 2026 | Heino | 0–1 | Pultinevicius | Round 2: Heino, Pessi - Pultinevicius, Paulius | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Jan 5, 2026 | Donovan | 0–1 | Heino | Round 7: Donovan, Stephen - Heino, Pessi | Sicilian Defense: Staunton-Cochrane Variation | |
| Jan 5, 2026 | Heino | 1–0 | Jarvi | Round 6: Heino, Pessi - Jarvi, Leo | Ruy Lopez: Closed, Martinez Variation | |
| Dec 14, 2025 | Vesa | ½–½ | Heino | Round 5: Vesa, Mikke - Heino, Pessi | French Defense: Advance Variation, Euwe Variation | |
| Dec 14, 2025 | Heino | ½–½ | Asikainen | Round 4: Heino, Pessi - Asikainen, Eeli | Ruy Lopez: Morphy Defense, Classical Defense Deferred | |
| Dec 14, 2025 | Rantala | 0–1 | Heino | Round 3: Rantala, Tuomas - Heino, Pessi | Sicilian Defense: Najdorf Variation | |
| Dec 14, 2025 | Heino | 1–0 | Rockas | Round 2: Heino, Pessi - Rockas, Elias | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Dec 14, 2025 | Gorbushin | 0–1 | Heino | Round 1: Gorbushin, Egor - Heino, Pessi | Sicilian Defense: Najdorf Variation | |
| Oct 5, 2025 | Efimov | ½–½ | Heino | Round 2: Efimov, Leonid - Heino, Pessi | Bogo-Indian Defense: Nimzowitsch Variation | |
| Jul 17, 2025 | Heino | 0–1 | Kulaots | Round 6: Heino, Pessi - Kulaots, Kaido | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| Jul 17, 2025 | Pakleza | 1–0 | Heino | Round 5: Pakleza, Zbigniew - Heino, Pessi | English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation | |
| Jul 15, 2025 | Heino | 1–0 | Koykka | Round 4: Heino, Pessi - Koykka, Pekka | Nimzowitsch Defense: Williams Variation | |
| Jul 15, 2025 | Vieira | 0–1 | Heino | Round 3: Vieira, Daniel - Heino, Pessi | Sicilian Defense: Najdorf Variation, Main Line | |
| Jul 14, 2025 | Riekkinen | * | Heino | Round 1: Riekkinen, Keijo - Heino, Pessi | ? | |
| Jun 7, 2025 | Heino | 1–0 | Sobolev | Nuorten SM 2025, U16 | French Defense: Rubinstein Variation, Blackburne Defense | |
| Jun 7, 2025 | Vesa | 0–1 | Heino | Nuorten SM 2025, U16 | Sicilian Defense: Najdorf Variation, English Attack | |
| Jun 6, 2025 | Heino | 0–1 | Jaakkola | Nuorten SM 2025, U16 | Sicilian Defense: Najdorf Variation, English Attack | |
| Jun 6, 2025 | Asikainen | 0–1 | Heino | Nuorten SM 2025, U16 | Sicilian Defense: Najdorf Variation | |
| Jun 5, 2025 | Heino | 1–0 | Pajarinen | Nuorten SM 2025, U16 | Sicilian Defense: Scheveningen Variation, Classical Variation | |
| May 7, 2025 | Heino | 1–0 | Valpas | Nuorten SM 2025, U16 | Sicilian Defense: Hyperaccelerated Fianchetto | |
| May 7, 2025 | Kauppila | 0–1 | Heino | Nuorten SM 2025, U16 | King's Indian Defense: Normal Variation, Rare Defenses | |
| Aug 28, 2024 | Ghazaryan | 1–0 | Heino | EYCC 2024 - O14 | Slav Defense: Chebanenko Variation, Advance System | |
| Nov 13, 2023 | Heino | 0–1 | Mamedov | u14 | Semi-Slav Defense: Normal Variation | |
| — | Heino | 1–0 | Gudnyjarson | Nordic Youth Chess Championship | Caro-Kann Defense: Advance Variation, Tal Variation | |
| — | Heino | 0–1 | Asikainen | Nordic Youth Chess Championship | Ruy Lopez: Morphy Defense, Classical Defense Deferred | |
| — | Heino | 0–1 | Frydendahl | Nordic Youth Chess Championship | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| — | Tripathi | 0–1 | Heino | Nordic Youth Chess Championship | King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Exchange Line | |
| — | Myagmarsuren | ½–½ | Heino | Nordic Youth Chess Championship | Sicilian Defense: Najdorf Variation, Adams Attack | |
| — | Jamil | 0–1 | Heino | Nordic Youth Chess Championship | English Opening: Anglo-Indian Defense, Queen's Knight Variation | |