| May 10, 2026 | Feijen | 1–0 | Seinen | Ronde 6: Feijen, Niels - Seinen, Niek | Caro-Kann Defense: Maróczy Variation | |
| May 10, 2026 | Schobben | 1–0 | Feijen | Ronde 5: Schobben, Morris - Feijen, Niels | English Opening: Anglo-Dutch Defense | |
| May 9, 2026 | Niels Feijen | 1–0 | Daniel Kaufmann | Ronde 4: Niels Feijen - Daniel Kaufmann | Sicilian Defense: Grand Prix Attack | |
| May 9, 2026 | Robert Hempelman | 0–1 | Niels Feijen | Ronde 3: Robert Hempelman - Niels Feijen | French Defense: Exchange Variation | |
| May 8, 2026 | Niels Feijen | 1–0 | Rihaan John | Ronde 1: Niels Feijen - Rihaan John | Vienna Game: Frankenstein-Dracula Variation | |
| May 17, 2025 | Feijen | 0–1 | Geboers | Round 3: Feijen, Niels - Geboers, Jimmy | French Defense: Classical Variation, Tartakower Variation | |
| May 17, 2025 | Thijssen | ½–½ | Feijen | Round 2: Thijssen, Freek - Feijen, Niels | French Defense: Advance Variation, Euwe Variation | |
| May 16, 2025 | Feijen | 0–1 | Van der Werf | Round 1: Feijen, Niels - Van der Werf, Joel | Sicilian Defense: Alapin Variation | |
| Jul 8, 2024 | Dauw | 1–0 | Feijen | Round 1: Dauw, Sterre - Feijen, Niels | French Defense: Advance Variation, Euwe Variation | |
| Jun 15, 2024 | Feijen | 0–1 | Teianu | Round 8: Feijen, Niels - Teianu, Maxim | French Defense: Horwitz Attack, Papa-Ticulat Gambit | |
| Jun 15, 2024 | Chua | 1–0 | Feijen | Round 7: Chua, Ethan - Feijen, Niels | French Defense: Rubinstein Variation, Fort Knox Variation | |
| Jun 15, 2024 | Feijen | 0–1 | Ruben | Round 6: Feijen, Niels - Ruben, Berend | Bishop's Opening: Vienna Hybrid | |
| Jun 15, 2024 | Wolff | 0–1 | Feijen | Round 5: Wolff, Christoph - Feijen, Niels | French Defense: Exchange Variation | |
| Jun 15, 2024 | Feijen | 1–0 | Lukin | Round 4: Feijen, Niels - Lukin, Yesenia | Sicilian Defense: Alapin Variation | |
| Jun 15, 2024 | Teianu | 1–0 | Feijen | Round 3: Teianu, Sabin - Feijen, Niels | Dutch Defense: Classical Variation, Huisl Variation | |
| Jun 15, 2024 | Feijen | ½–½ | Roebers | Round 2: Feijen, Niels - Roebers, Jan | Vienna Game: Vienna Gambit, Paulsen Attack | |
| Jun 1, 2024 | Feijen | ½–½ | Koppenens | WLC Tournament 2024 A | ? | |
| Jun 1, 2024 | Feijen | ½–½ | Bye | WLC Tournament 2024 A | ? | |
| Jun 1, 2024 | Maters | 1–0 | Feijen | WLC Tournament 2024 A | ? | |
| May 31, 2024 | Verhoeven | 1–0 | Feijen | WLC Tournament 2024 A | French Defense: Advance Variation, Euwe Variation | |
| Apr 1, 2024 | Pauw | ½–½ | Feijen | Round 5: Pauw, Martijn - Feijen, Niels | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Aug 6, 2022 | Johan De Wolf | * | Niels Feijen | Round 1: Johan De Wolf - Niels Feijen | ? | |
