| Jul 14, 2026 | Keinanen | 1–0 | Lappalainen | Round 1: Keinanen, Toivo - Lappalainen, Eemi | English Defense | |
| Jan 4, 2026 | Odner | 1–0 | Lappalainen | Round 7: Odner, Aarni - Lappalainen, Eemi | French Defense: Tarrasch Variation, Morozevich Variation | |
| Jan 4, 2026 | Lappalainen | 0–1 | Sippola | Round 6: Lappalainen, Eemi - Sippola, Sara-Olivia | Sicilian Defense: O'Kelly Variation, Yerevan System | |
| Jan 4, 2026 | Rintala | ½–½ | Lappalainen | Round 5: Rintala, Miliam - Lappalainen, Eemi | French Defense: Tarrasch Variation, Morozevich Variation | |
| Jan 4, 2026 | Lappalainen | 0–1 | Moisio | Round 4: Lappalainen, Eemi - Moisio, Miska | Scotch Game: Potter Variation | |
| Jan 3, 2026 | Sinitsyn | ½–½ | Lappalainen | Round 2: Sinitsyn, Anton - Lappalainen, Eemi | English Defense | |
| Jan 3, 2026 | Lappalainen | 0–1 | Polkki | Round 1: Lappalainen, Eemi - Polkki, Eino | Scotch Game: Malaniuk Variation | |
| Dec 14, 2025 | Lappalainen | 0–1 | Kallunki | Round 3: Lappalainen, Eemi - Kallunki, Karoliina | Caro-Kann Defense: Maróczy Variation | |
| Jul 14, 2025 | Wartiovaara | 1–0 | Lappalainen | Round 1: Wartiovaara, Oliver - Lappalainen, Eemi | French Defense: Advance Variation, Paulsen Attack | |
| Jun 7, 2025 | Lappalainen | ½–½ | Odner | Nuorten SM 2025, U18 | Sicilian Defense: Closed, Traditional | |
| Jun 7, 2025 | Salonen | 1–0 | Lappalainen | Nuorten SM 2025, U18 | French Defense: Tarrasch Variation, Morozevich Variation | |
| Jun 6, 2025 | Collander | 0–1 | Lappalainen | Nuorten SM 2025, U18 | English Defense | |
| Jun 6, 2025 | Lappalainen | 1–0 | Rintala | Nuorten SM 2025, U18 | Scotch Game: Potter Variation | |
| Jun 5, 2025 | Hietanen | 1–0 | Lappalainen | Nuorten SM 2025, U18 | English Defense | |
| May 7, 2025 | Lappalainen | 0–1 | Hakkinen | Nuorten SM 2025, U18 | Caro-Kann Defense: Exchange Variation, Rubinstein Variation | |
| — | Lappalainen | 0–1 | Olsen | Nordic Youth Chess Championship | Sicilian Defense: Closed, Traditional | |
| — | Lappalainen | 0–1 | Thorisson | Nordic Youth Chess Championship | Sicilian Defense: Closed | |
| — | Lappalainen | 0–1 | Apol | Nordic Youth Chess Championship | Sicilian Defense: Closed, Traditional | |
| — | Amundsen | 0–1 | Lappalainen | Nordic Youth Chess Championship | English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation | |
| — | Johansson | 0–1 | Lappalainen | Nordic Youth Chess Championship | French Defense: Tarrasch Variation, Chistyakov Defense | |
| — | Andries | 1–0 | Lappalainen | Nordic Youth Chess Championship | French Defense: Advance Variation, Extended Bishop Swap | |