| Dec 19, 2025 | Narasani | 0–1 | De Witte | Sunway Sitges 2025 | Old Indian Defense | |
| Dec 4, 2025 | Ortega Herrera | 1–0 | De Witte | XXII Torneo Aficionados Gran Hotel Bali Grupo B | King's Indian Defense: Fianchetto Variation, Long Variation | |
| Nov 30, 2025 | De Witte | ½–½ | Lau | XXII Torneo Aficionados Gran Hotel Bali Grupo B | French Defense: Classical Variation, Shirov-Anand Variation | |
| Jul 30, 2025 | Demiddele | * | De Witte | Round 9: Demiddele, Kevin - De Witte, Wiebe | ? | |
| Jul 28, 2025 | De Witte | * | Baarslag | Round 7: De Witte, Wiebe - Baarslag, Ed | ? | |
| Jul 27, 2025 | De Witte | * | Balde | Round 6: De Witte, Wiebe - Balde, Esko | ? | |
| Jul 26, 2025 | Avis | * | De Witte | Round 5: Avis, Fred - De Witte, Wiebe | ? | |
| Jul 25, 2025 | De Witte | * | Wille | Round 4: De Witte, Wiebe - Wille, Erik | ? | |
| Jul 24, 2025 | Andriessen | * | De Witte | Round 3: Andriessen, Bart Jan - De Witte, Wiebe | ? | |
| Jul 23, 2025 | De Witte | * | Van Renselaar | Round 2: De Witte, Wiebe - Van Renselaar, Lars | ? | |
| Jul 22, 2025 | Gruenhagen | 1–0 | De Witte | Round 1: Gruenhagen, Marc, Dr. - De Witte, Wiebe | Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation | |
| May 18, 2025 | Feng | ½–½ | De Witte | Round 6: Feng, Elysia - De Witte, Wiebe | Pirc Defense | |
| May 18, 2025 | De Witte | 0–1 | Zhang | Round 5: De Witte, Wiebe - Zhang, Xiheng | Sicilian Defense: Alapin Variation, Barmen Defense, Modern Line | |
| May 17, 2025 | Ellenbroek | 1–0 | De Witte | Round 3: Ellenbroek, Ton - De Witte, Wiebe | Catalan Opening | |
| May 17, 2025 | De Witte | ½–½ | Quintus | Round 2: De Witte, Wiebe - Quintus, Max | Sicilian Defense: Alapin Variation | |
| May 16, 2025 | Mostertman | 1–0 | De Witte | Round 1: Mostertman, Milan - De Witte, Wiebe | Philidor Defense: Lion Variation | |
| — | Beerdsen | 1–0 | De Witte | HZ University of Applied Sciences Chess Tournament | Philidor Defense: Lion Variation, Shirov Gambit | |
