| May 25, 2026 | De Mon | * | Gijsen | Round 7: De Mon, Gino - Gijsen, William | ? | |
| May 25, 2026 | Gijsen | * | Quinones-Maletti | Round 6: Gijsen, William - Quinones-Maletti, Julio Guillermo | ? | |
| May 24, 2026 | Janse | * | Gijsen | Round 5: Janse, Jan Jaap - Gijsen, William | ? | |
| May 24, 2026 | Gijsen | * | Habig | Round 4: Gijsen, William - Habig, Bryan | ? | |
| May 23, 2026 | Citak | ½–½ | Gijsen | Round 2: Citak, Selim - Gijsen, William | Queen's Gambit Declined: Modern Variation, Normal Line | |
| May 22, 2026 | Gijsen | * | Omnes | Round 1: Gijsen, William - Omnes, Tiago | ? | |
| Feb 21, 2026 | Gijsen | 0–1 | De Winter | Round 4: Gijsen, William - De Winter, Arthur | Sicilian Defense: Classical Variation, Fianchetto Variation | |
| Sep 13, 2025 | Gijsen | 0–1 | Joel Van Der Werf | Round 11: Gijsen, William - Joel Van Der Werf | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Sep 13, 2025 | Arnold | 1–0 | Gijsen | Round 10: Arnold, Rhys - Gijsen, William | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Sep 13, 2025 | Gijsen | 0–1 | IJzermans | Round 9: Gijsen, William - IJzermans, Cees | Scandinavian Defense: Valencian Variation | |
| Sep 13, 2025 | Smeets | 0–1 | Gijsen | Round 8: Smeets, Kobe - Gijsen, William | King's Indian Attack | |
| Sep 13, 2025 | Gijsen | 0–1 | Michiel Van Wissen | Round 7: Gijsen, William - Michiel Van Wissen | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Sep 13, 2025 | Kurt | 0–1 | Gijsen | Round 5: Kurt, Sascha - Gijsen, William | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| Sep 13, 2025 | Gijsen | 1–0 | Dinanath | Round 4: Gijsen, William - Dinanath, Hrdya | Vienna Game: Vienna Gambit, Paulsen Attack | |
| Sep 13, 2025 | Gijsen | 0–1 | Ritzerveld | Round 2: Gijsen, William - Ritzerveld, Noah | Slav Defense | |
| Sep 13, 2025 | Meulmeester | 1–0 | Gijsen | Round 3: Meulmeester, Luuk - Gijsen, William | Zukertort Opening: Nimzo-Larsen Variation | |
| Sep 13, 2025 | Bram Van Der Velden | 1–0 | Gijsen | Round 1: Bram Van Der Velden - Gijsen, William | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Sep 13, 2025 | Gijsen | 1–0 | Kazarian | 3.5: Gijsen, William - Kazarian, Anna-Maja | Queen's Gambit Declined | |
| Sep 13, 2025 | Rogelio Lujan Garcia | 0–1 | Gijsen | 3.4: Rogelio Lujan Garcia - Gijsen, William | Indian Defense: Gibbins-Weidenhagen Gambit | |
| Sep 13, 2025 | Gijsen | ½–½ | Meulmeester | 3.3: Gijsen, William - Meulmeester, Luuk | Queen's Gambit Declined: Neo-Orthodox Variation, Main Line | |
| Sep 13, 2025 | Grooten | 1–0 | Gijsen | 3.2: Grooten, Herman - Gijsen, William | Queen's Gambit Declined: Ragozin Defense | |
| Sep 13, 2025 | Gijsen | 1–0 | Bram Van Der Velden | 3.1: Gijsen, William - Bram Van Der Velden | Queen's Gambit Declined | |
| Sep 12, 2025 | Mark Van Der Werf | 1–0 | Gijsen | Round 6: Mark Van Der Werf - Gijsen, William | English Opening: Anglo-Indian Defense, Queen's Indian Formation | |
| May 17, 2025 | Hubers | 1–0 | Gijsen | Round 2: Hubers, Daan - Gijsen, William | ? | |
| Nov 1, 2024 | Grutter | 1–0 | Gijsen | Amsterdam Chess Open 2024 | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Jun 23, 2024 | Becx | 0–1 | Gijsen | Round 6: Becx, Cesar - Gijsen, William | Bird Opening: Dutch Variation | |
| Jun 21, 2024 | Stefansson | 1–0 | Gijsen | Round 2: Stefansson, Vignir Vatnar - Gijsen, William | Sicilian Defense: Najdorf Variation, Freak Attack | |
| Mar 31, 2024 | Krylov | * | Gijsen | Round 6: Krylov, Philippe - Gijsen, William | ? | |
| Mar 30, 2024 | Gijsen | ½–½ | Tiggelman | Round 5: Gijsen, William - Tiggelman, Rene | French Defense: Two Knights Variation | |
| Mar 30, 2024 | Liefrink | ½–½ | Gijsen | Round 4: Liefrink, Feike - Gijsen, William | Queen's Pawn Game: Colle System, Traditional Colle | |
| Mar 30, 2024 | Gijsen | * | De Man | Round 3: Gijsen, William - De Man, Luuk | ? | |
| Mar 30, 2024 | Gijsen | 0–1 | Van den Doel | Round 1: Gijsen, William - Van den Doel, Erik | Petrov's Defense: Three Knights Game | |
| Mar 29, 2024 | Albertus | * | Gijsen | Round 2: Albertus, Bram - Gijsen, William | ? | |
| Jul 18, 2023 | Alvarez Calzadilla | ½–½ | Gijsen | Open Internacional Sant Marti 2023 | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation | |
| May 28, 2023 | Gijsen | * | Suskovic | Limburg Open | ? | |
| May 28, 2023 | Faldum | * | Gijsen | Limburg Open | ? | |
| Jan 13, 2023 | Gijsen | 1–0 | Mach | Prague Open | Czech Tour | French Defense: MacCutcheon Variation, Tartakower Variation | |
| Jan 12, 2023 | Schouten | * | Gijsen | Prague Open | Czech Tour | ? | |
| Jan 10, 2023 | Nesse | * | Gijsen | Prague Open | Czech Tour | ? | |
| Jan 9, 2023 | Gijsen | 0–1 | Mitusov | Prague Open | Czech Tour | Bishop's Opening: Vienna Hybrid, Hromádka Variation | |
| Jan 8, 2023 | Baumegger | 1–0 | Gijsen | Prague Open | Czech Tour | Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense | |
| Jan 7, 2023 | Gijsen | 1–0 | Soucek | Prague Open | Czech Tour | Vienna Game: Vienna Gambit, Bardeleben Variation | |
| Jan 6, 2023 | Gijsen | 1–0 | Bohdal | Prague Open | Czech Tour | ? | |
