| 23 jul 2026 | Lavendelis, Egons 2278 | Willstedt, Lukas 2118 | 1-0 | A07 Ataque Indio de Rey | Stockholm Summer Nights Open | 60 | Ver |
| 22 jul 2026 | Willstedt, Lukas 2118 | Suarez Garcia, Carlos 1996 2471 | 0-1 | D02 Apertura de Peón de Dama: Zukertort Variation | Stockholm Summer Nights Open | 33 | Ver |
| 21 jul 2026 | Engqvist, Thomas 2311 | Willstedt, Lukas 2118 | 0-1 | D37 Gambito de Dama rehusado: Three Knights, Vienna Variation | Stockholm Summer Nights Open | 42 | Ver |
| 3 jul 2026 | Eklund, Joel 2134 | Willstedt, Lukas 2118 | 0-1 | C11 Defensa Francesa: Steinitz Variation, Boleslavsky Variation | Schack-SM 2026 | Mästarklassen | 76 | Ver |
| 2 jul 2026 | Willstedt, Lukas 2118 | Cibo, Faris 2150 | 1-0 | A46 Defensa India: Wade-Tartakower Defense | Schack-SM 2026 | Mästarklassen | 22 | Ver |
| 2 jul 2026 | Willstedt, Lukas 2118 | Muntean, Victor 2170 | ½-½ | A45 Defensa India: Accelerated London System | Schack-SM 2026 | Mästarklassen | 32 | Ver |
| 30 jun 2026 | Willstedt, Lukas 2118 | Dingertz, Erik 2211 | 1-0 | E04 Apertura Catalana: Open Defense | Schack-SM 2026 | Mästarklassen | 33 | Ver |
| 29 jun 2026 | Sundin, Emanuel 2157 | Willstedt, Lukas 2118 | ½-½ | C02 Defensa Francesa: Advance Variation, Euwe Variation | Schack-SM 2026 | Mästarklassen | 33 | Ver |
| 27 jun 2026 | Morell, Ludvig 2026 | Willstedt, Lukas 2118 | ½-½ | C50 Apertura Italiana: Deutz Gambit | Schack-SM 2026 | Mästarklassen | 19 | Ver |
| 24 jun 2026 | Willstedt, Lukas 2118 | Bodemar, Jonathan 2124 | 1-0 | E11 Defensa Bogoindia: Retreat Variation | Schack-SM 2026 | Mästarklassen | 36 | Ver |
| 3 abr 2026 | Willstedt, Lukas 2062 | Arman, Deniz 2356 | 0-1 | E90 Defensa India de Rey: Normal Variation, Rare Defenses | The Paskturneringen 2026 | 44 | Ver |
| 24 mar 2026 | Willstedt, Lukas 2072 | Sivuk, Vitaly 2517 | 0-1 | A48 Ataque Torre: Fianchetto Defense | Tyresö Open 2026 | 33 | Ver |
| 18 ene 2026 | Eklund, Lars-Goran 2233 | Willstedt, Lukas 2044 | 0-1 | D02 Apertura de Peón de Dama: London System | Rond 6: Eklund, Lars-Goran - Willstedt, Lukas | 32 | Ver |
| 18 ene 2026 | Willstedt, Lukas 2044 | Akesson, Joel 2216 | 0-1 | D02 Apertura de Peón de Dama: Symmetrical Variation | Rond 5: Willstedt, Lukas - Akesson, Joel | 33 | Ver |
| 23 nov 2025 | Willstedt, Lukas 2118 | Morell, Oscar 2119 | 1-0 | D02 Apertura de Peón de Dama: Zukertort Variation | The Juniorallsvenskan 2025, Division I | 31 | Ver |
| 23 nov 2025 | Ral Lustig, Melvin 2321 | Willstedt, Lukas 2118 | 1-0 | A15 Apertura Inglesa: Anglo-Indian Defense, King's Knight Variation | The Juniorallsvenskan 2025, Division I | 53 | Ver |
| 22 nov 2025 | Cibo, Faris 2139 | Willstedt, Lukas 2118 | 1-0 | C18 Defensa Francesa: Winawer Variation, Portisch-Hook Variation | The Juniorallsvenskan 2025, Division I | 35 | Ver |
| 22 nov 2025 | Sandberg, Lucas 2268 | Willstedt, Lukas 2118 | 1-0 | A01 Ataque Nimzo-Larsen | The Juniorallsvenskan 2025, Division I | 28 | Ver |
| 2 nov 2025 | Kingsley, Elias 2064 | Willstedt, Lukas 2118 | ½-½ | A45 Defensa India: Accelerated London System | Stockholm Grand Prix 2025 | Stockholm Grand Prix 2025 | 33 | Ver |
| 2 nov 2025 | Willstedt, Lukas 2118 | Rasti, Arvin 2274 | 0-1 | A45 Defensa India: Accelerated London System | Stockholm Grand Prix 2025 | Stockholm Grand Prix 2025 | 65 | Ver |