| Jan 5, 2026 | Kuipers | 1–0 | Burdielov | Runde 7: Kuipers, Hartmut, Dr. - Burdielov, Illia | Queen's Gambit Declined: Modern Variation | |
| Jan 4, 2026 | Feldkaemper | ½–½ | Kuipers | Runde 6: Feldkaemper, Andreas - Kuipers, Hartmut, Dr. | Slav Defense: Three Knights Variation | |
| Jan 4, 2026 | Louis Joel Fuchs | 0–1 | Kuipers | Runde 5: Louis Joel Fuchs - Kuipers, Hartmut, Dr. | Caro-Kann Defense: Exchange Variation | |
| Jan 3, 2026 | Kuipers | 0–1 | Janssen | Runde 4: Kuipers, Hartmut, Dr. - Janssen, Uwe | Tarrasch Defense | |
| Jan 3, 2026 | Kuipers | 1–0 | Klages | Runde 3: Kuipers, Hartmut, Dr. - Klages, Justus | Queen's Gambit Declined: Manhattan Variation | |
| Jan 2, 2026 | Marten Rehn | ½–½ | Kuipers | Runde 2: Marten Rehn - Kuipers, Hartmut, Dr. | Caro-Kann Defense: Advance Variation | |
| Jan 2, 2026 | Kuipers | ½–½ | Kai Zhang | Runde 1: Kuipers, Hartmut, Dr. - Kai Zhang | Grünfeld Defense: Three Knights Variation, Burille Variation | |
| Oct 23, 2025 | Rudolph | ½–½ | Kuipers | Runde 1: Rudolph, Max - Kuipers, Hartmut, Dr. | Caro-Kann Defense: Euwe Attack | |
| Jun 9, 2024 | Kuipers | 0–1 | Nordhorn | Round 5: Kuipers, Hartmut, Dr. - Nordhorn, Horst | Polish Defense | |
| Jun 9, 2024 | Kuipers | 0–1 | Tiedemann | Round 4: Kuipers, Hartmut, Dr. - Tiedemann, Joerg | Slav Defense: Three Knights Variation | |
| Jun 8, 2024 | Kuipers | 0–1 | Vahab Nejhab Amlashi | Round 3: Kuipers, Hartmut, Dr. - Vahab Nejhab Amlashi, Mohamad Hossein | Semi-Slav Defense: Accelerated Move Order | |
| Jun 7, 2024 | Kuipers | 0–1 | Zoch | Round 1: Kuipers, Hartmut, Dr. - Zoch, Werner, Dr. | Indian Defense: Normal Variation | |
