| Mar 1, 2026 | Hietanen | 0–1 | Paasikangas | new tournament description | Indian Defense: Accelerated London System | |
| Mar 1, 2026 | Hietanen | 1–0 | Kivimaki | new tournament description | Benko Gambit Declined: Main Line | |
| Feb 28, 2026 | Vesa | 0–1 | Hietanen | new tournament description | French Defense: Knight Variation | |
| Feb 28, 2026 | Hietanen | 0–1 | Sipila | new tournament description | Queen's Pawn Game: London System | |
| Feb 27, 2026 | Tuominen | ½–½ | Hietanen | new tournament description | French Defense: Advance Variation, Euwe Variation | |
| Feb 27, 2026 | Hietanen | ½–½ | Aalto | new tournament description | Trompowsky Attack | |
| Feb 27, 2026 | Ertbjerg | 0–1 | Hietanen | new tournament description | English Defense | |
| Feb 15, 2026 | Briem | 1–0 | Hietanen | Nordisk Mesterskab gruppe A | English Defense | |
| Feb 14, 2026 | Hietanen | ½–½ | Wahlgreen | Nordisk Mesterskab gruppe A | Queen's Pawn Game: Accelerated London System | |
| Feb 14, 2026 | Iskos | 0–1 | Hietanen | Nordisk Mesterskab gruppe A | Horwitz Defense | |
| Feb 13, 2026 | Hietanen | 0–1 | Olsen | Nordisk Mesterskab gruppe A | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Feb 13, 2026 | Salonen | ½–½ | Hietanen | Nordisk Mesterskab gruppe A | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Feb 12, 2026 | Apol | 0–1 | Hietanen | Nordisk Mesterskab gruppe A | French Defense: Tarrasch Variation, Morozevich Variation | |
| Jan 4, 2026 | Paksai | 0–1 | Hietanen | Round 7: Paksai, Nikolett - Hietanen, Herman | French Defense: Exchange Variation | |
| Jan 4, 2026 | Hietanen | 0–1 | Ruusunen | Round 6: Hietanen, Herman - Ruusunen, Onni | London System: Poisoned Pawn Variation | |
| Jan 4, 2026 | Hietanen | 1–0 | Zhivotova | Round 4: Hietanen, Herman - Zhivotova, Aleksandra | Pirc Defense | |
| Jan 3, 2026 | Valpas | ½–½ | Hietanen | Round 2: Valpas, Jami - Hietanen, Herman | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Dec 14, 2025 | Hakkinen | 0–1 | Hietanen | Round 5: Hakkinen, Aleksandr - Hietanen, Herman | Horwitz Defense | |
| Dec 14, 2025 | Hietanen | 0–1 | Salonen | Round 1: Hietanen, Herman - Salonen, Aku | Queen's Pawn Game: Colle System | |
| Jul 20, 2025 | Olde | 1–0 | Hietanen | Round 9: Olde, Margareth - Hietanen, Herman | Queen's Indian Defense: Classical Variation, Traditional Variation | |
| Jul 18, 2025 | Hietanen | ½–½ | Niemi | Round 8: Hietanen, Herman - Niemi, Kalle | Trompowsky Attack | |
| Jul 17, 2025 | Hietanen | 0–1 | Nyysti | Round 6: Hietanen, Herman - Nyysti, Sampsa | Indian Defense: Wade-Tartakower Defense | |
| Jul 14, 2025 | Hietanen | 0–1 | Kulaots | Round 2: Hietanen, Herman - Kulaots, Kaido | Philidor Defense: Lion Variation | |
| Jul 14, 2025 | Matera | * | Hietanen | Round 1: Matera, Luca - Hietanen, Herman | ? | |
| Jun 8, 2025 | Salonen | 1–0 | Hietanen | Nuorten SM 2025, U18 | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Jun 7, 2025 | Hietanen | 1–0 | Collander | Nuorten SM 2025, U18 | Benko Gambit | |
| Jun 7, 2025 | Ruusunen | 0–1 | Hietanen | Nuorten SM 2025, U18 | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Jun 6, 2025 | Hietanen | 0–1 | Odner | Nuorten SM 2025, U18 | Indian Defense | |
| Jun 6, 2025 | Hakkinen | ½–½ | Hietanen | Nuorten SM 2025, U18 | Horwitz Defense | |
| Jun 5, 2025 | Hietanen | 1–0 | Lappalainen | Nuorten SM 2025, U18 | English Defense | |
| Jun 5, 2025 | Karimies | 0–1 | Hietanen | Nuorten SM 2025, U18 | Catalan Opening: Open Defense | |
