| Jun 7, 2026 | Cornelisse | 1–0 | Louis | Round 7: Cornelisse, John - Louis, Volker | Zukertort Opening: Reversed Grünfeld | |
| Jun 6, 2026 | Neurohr | ½–½ | Cornelisse | Round 6: Neurohr, Juergen - Cornelisse, John | English Opening: King's English Variation | |
| Jun 6, 2026 | Cornelisse | 1–0 | Hardt | Round 5: Cornelisse, John - Hardt, Bernd | English Opening: Anglo-Indian Defense, Queen's Indian Formation | |
| Jun 5, 2026 | Kanyamarala | 1–0 | Cornelisse | Round 4: Kanyamarala, Tarun - Cornelisse, John | Queen's Gambit Declined | |
| Jun 5, 2026 | Cornelisse | 1–0 | Gaul | Round 3: Cornelisse, John - Gaul, Alexander | King's Indian Attack: Double Fianchetto | |
| May 16, 2026 | Bekker | 1–0 | Cornelisse | Round 3: Bekker, Stefan - Cornelisse, John | Réti Opening: Anglo-Slav Variation, with g3 | |
| May 15, 2026 | Cornelisse | ½–½ | Lombaers | Round 2: Cornelisse, John - Lombaers, Peter | English Opening: Anglo-Indian Defense, King's Indian Formation | |
| Dec 13, 2025 | Cornelisse | 1–0 | Follesa | Round 5: Cornelisse, John - Follesa, Enrico | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Nov 28, 2025 | Sandoval Mercado | 1–0 | Cornelisse | XXII Torneo Internacional Gran Hotel Bali Grupo A | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Jun 22, 2025 | Cornelisse | ½–½ | Windmueller | Round 7: Cornelisse, John - Windmueller, Simon | English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation | |
| Jun 21, 2025 | Kappelmann | 0–1 | Cornelisse | Round 6: Kappelmann, Florian - Cornelisse, John | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jun 21, 2025 | Cornelisse | ½–½ | Plaumann | Round 5: Cornelisse, John - Plaumann, Arvin | Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation | |
| Jun 20, 2025 | Cornelisse | 1–0 | Lenz | Round 3: Cornelisse, John - Lenz, Joshua | King's Indian Attack | |
| Jun 19, 2025 | Haeusler | 0–1 | Cornelisse | Round 2: Haeusler, Luca - Cornelisse, John | Caro-Kann Defense: Endgame Offer | |
| Jun 19, 2025 | Cornelisse | 1–0 | Kasperczyk | Round 1: Cornelisse, John - Kasperczyk, Thomas | King's Indian Attack | |
| Jun 17, 2025 | Roshka | 1–0 | Cornelisse | Round 4: Roshka, Yevgeniy - Cornelisse, John | King's Indian Attack | |
| Jun 1, 2025 | Cornelisse | 0–1 | Van Meegen | Round 5: Cornelisse, John - Van Meegen, Ruud | King's Indian Attack: Spassky Variation | |
| Oct 25, 2024 | Cornelisse | ½–½ | Milliet | 39th European Chess Club Cup | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Oct 24, 2024 | Cumming | ½–½ | Cornelisse | 39th European Chess Club Cup | Caro-Kann Defense: Tartakower Variation | |
| Oct 23, 2024 | Cornelisse | 0–1 | Maisuradze | 39th European Chess Club Cup | Zukertort Opening: Queen's Gambit Invitation | |
| Oct 20, 2024 | Cornelisse | 0–1 | Arnaudov | 39th European Chess Club Cup | Zukertort Opening: Queen's Gambit Invitation | |
| Jun 2, 2024 | Barzen | ½–½ | Cornelisse | Round 7: Barzen, Pascal - Cornelisse, John | Caro-Kann Defense: Tartakower Variation | |
| Jun 1, 2024 | Cornelisse | 1–0 | Suranyi | Round 6: Cornelisse, John - Suranyi, Pal | Zukertort Opening: Reversed Grünfeld | |
| Jun 1, 2024 | Grabowski | ½–½ | Cornelisse | Round 5: Grabowski, Pawel - Cornelisse, John | Queen's Pawn Game: Colle System | |
| May 31, 2024 | Cornelisse | * | Pauly | Round 4: Cornelisse, John - Pauly, Markus | ? | |
| May 31, 2024 | Berres | * | Cornelisse | Round 3: Berres, Eric - Cornelisse, John | ? | |
| May 30, 2024 | Cornelisse | * | Schmidt | Round 2: Cornelisse, John - Schmidt, Waldemar | ? | |
| Apr 3, 2023 | Botez | 0–1 | Cornelisse | Reykjavik Open 2023 | Catalan Opening: Open Defense, Classical Line | |
| Apr 1, 2023 | Cornelisse | 0–1 | Williams | Reykjavik Open 2023 | Sicilian Defense: Moscow Variation | |
| Mar 31, 2023 | Oberschilp | * | Cornelisse | Reykjavik Open | ? | |
| Mar 29, 2023 | Cornelisse | 0–1 | Erdos | Reykjavik Open 2023 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jan 14, 2022 | Lhotska | 0–1 | Cornelisse | Open Praha 2022 | Caro-Kann Defense: Maróczy Variation | |
| Jan 13, 2022 | Cornelisse | 0–1 | Fus | Open Praha 2022 | Nimzo-Indian Defense: Rubinstein System, Hübner Variation | |
| Jan 12, 2022 | Acor | ½–½ | Cornelisse | Open Praha 2022 | Caro-Kann Defense: Two Knights Attack | |
| Jan 11, 2022 | Kobl | 0–1 | Cornelisse | Open Praha 2022 | Nimzo-Indian Defense: Sämisch Variation, Romanovsky Variation | |
| Jan 8, 2022 | Pijpers | 1–0 | Cornelisse | Open Praha 2022 | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| — | Cornelisse | 0–1 | Ajay Krishna | Reykjavik Open 2023 | Sicilian Defense: Moscow Variation, Main Line | |
| — | Cornelisse | 0–1 | Sale | Split Chess Open 2025 | English Opening: Romanishin Gambit | |
| — | Cornelisse | 0–1 | Mencinger | Split Chess Open 2025 | Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation | |
| — | Cornelisse | 0–1 | Segovic | Split Chess Open 2025 | King's Indian Attack: Spassky Variation | |
| — | Cornelisse | ½–½ | Saric | Split Chess Open 2025 | King's Indian Attack: Double Fianchetto | |
| — | Nagy | ½–½ | Cornelisse | Split Chess Open 2025 | Queen's Gambit Accepted | |
