| — | van der Valk | 0–1 | Besou | Grenke Open | Sicilian Defense: Najdorf Variation | |
| — | Leeb | ½–½ | van der Valk | Grenke Open | Zukertort Opening | |
| Jun 8, 2025 | van der Valk | 0–1 | Pauly | Round 4: van der Valk, Niklas - Pauly, Carlo | Sicilian Defense: Kalashnikov Variation | |
| Oct 29, 2024 | van der Valk | 0–1 | Zude | Round 4: van der Valk, Niklas - Zude, Arno | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| Mar 31, 2024 | Kulon | 1–0 | van der Valk | new tournament description | English Opening: King's English Variation | |
| Mar 30, 2024 | van der Valk | 1–0 | Skawinski | new tournament description | ? | |
| Mar 30, 2024 | Wyss | 0–1 | van der Valk | Grenke Open | King's Indian Attack | |
| Nov 24, 2024 | Liebelt | 1–0 | van der Valk | Round 5: Liebelt, Jannik - van der Valk, Niklas | King's Indian Attack | |
| Nov 23, 2024 | van der Valk | 1–0 | Griebl | Round 3: van der Valk, Niklas - Griebl, Joern | King's Pawn Game | |
| Nov 23, 2024 | van der Valk | ½–½ | Brunke | Round 4: van der Valk, Niklas - Brunke, Pascal | French Defense: Rubinstein Variation, Blackburne Defense | |
| May 28, 2023 | van der Valk | * | Zilverberg | Limburg Open | ? | |
| May 28, 2023 | Goudriaan | * | van der Valk | Limburg Open | ? | |
| May 7, 2023 | van der Valk | ½–½ | Wiley | WLC Toernooi 2023 A | French Defense: Paulsen Variation | |
| May 7, 2023 | Coenen | ½–½ | van der Valk | WLC Toernooi 2023 A | Indian Defense | |
| May 6, 2023 | van der Valk | ½–½ | Simons | WLC Toernooi 2023 A | Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line | |
| May 6, 2023 | Geboers | 0–1 | van der Valk | WLC Toernooi 2023 A | Bogo-Indian Defense: Wade-Smyslov Variation | |
| May 6, 2023 | Messaoudi | 0–1 | van der Valk | WLC Toernooi 2023 A | Nimzo-Indian Defense: Classical Variation, Noa Variation | |
| May 5, 2023 | van der Valk | ½–½ | Cuyvers | WLC Toernooi 2023 A | Catalan Opening: Closed | |
| Nov 13, 2022 | Womacka | 1–0 | van der Valk | 25th Open Bavarian Championship | Italian Game: Giuoco Piano | |
| Nov 12, 2022 | van der Valk | ½–½ | Zysk | 25th Open Bavarian Championship | English Opening: Neo-Catalan | |
| Nov 11, 2022 | Acarbay | 0–1 | van der Valk | 25th Open Bavarian Championship | Caro-Kann Defense: Endgame Offer | |
| Nov 10, 2022 | van der Valk | ½–½ | Galioglu | 25th Open Bavarian Championship | English Opening: Caro-Kann Defensive System | |
| Nov 9, 2022 | Hornung | 0–1 | van der Valk | 25th Open Bavarian Championship | ? | |
| Nov 8, 2022 | van der Valk | 1–0 | Schleich | 25th Open Bavarian Championship | ? | |
| Nov 7, 2022 | Feuerstack | 1–0 | van der Valk | 25th Open Bavarian Championship | Caro-Kann Defense: Endgame Variation | |
| Nov 6, 2022 | van der Valk | 1–0 | Bischoff | 25th Open Bavarian Championship | ? | |
| — | van der Valk | 1–0 | Blijlevens | WLC 2022 A | Dutch Defense: Classical Variation, Huisl Variation | |
| — | van der Valk | ½–½ | Koster | WLC 2022 A | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line | |
| — | van der Valk | 1–0 | Faber | WLC 2022 A | Catalan Opening: Closed | |
| — | Beerdsen | 1–0 | van der Valk | WLC 2022 A | Caro-Kann Defense: Two Knights Attack | |
| — | Duson | 0–1 | van der Valk | WLC 2022 A | Nimzo-Indian Defense: Normal Variation, Gligoric System | |
| — | Klapwijk | ½–½ | van der Valk | WLC 2022 A | Caro-Kann Defense: Hillbilly Attack | |