| May 25, 2026 | Heldenbergh | * | Pathak | Round 7: Heldenbergh, Nils - Pathak, Raghav | ? | |
| May 25, 2026 | Coenen | * | Heldenbergh | Round 6: Coenen, Eduard - Heldenbergh, Nils | ? | |
| May 24, 2026 | Heldenbergh | * | Mueer | Round 5: Heldenbergh, Nils - Mueer, Sebastian | ? | |
| May 24, 2026 | De Zoeten | * | Heldenbergh | Round 4: De Zoeten, Cato - Heldenbergh, Nils | ? | |
| May 23, 2026 | Heldenbergh | * | Roebers | Round 3: Heldenbergh, Nils - Roebers, Jan | ? | |
| May 23, 2026 | Gloeckler | 1–0 | Heldenbergh | Round 2: Gloeckler, Christian - Heldenbergh, Nils | Sicilian Defense: Old Sicilian | |
| May 22, 2026 | Heldenbergh | * | Van der Leij | Round 1: Heldenbergh, Nils - Van der Leij, Arjan | ? | |
| Apr 3, 2026 | Heldenbergh | 0–1 | Draskovic | Grenke Chess Festival 2026 Open | Sicilian Defense: Richter-Rauzer Variation, Modern Variation | |
| Jan 3, 2026 | Marn | 1–0 | Heldenbergh | Round 9: Marn, Jan - Heldenbergh, Nils | Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch | |
| Jan 2, 2026 | Heldenbergh | 0–1 | Kanov | Round 8: Heldenbergh, Nils - Kanov, Nikola | Sicilian Defense: Scheveningen Variation, Classical Main Line | |
| Jan 1, 2026 | Yao | 0–1 | Heldenbergh | Round 7: Yao, Lan - Heldenbergh, Nils | Sicilian Defense: Kupreichik Variation | |
| Dec 31, 2025 | Heldenbergh | * | Liloni | Round 6: Heldenbergh, Nils - Liloni, Francesco Mattia | ? | |
| Dec 30, 2025 | Panelo | ½–½ | Heldenbergh | Round 5: Panelo, Marcelo - Heldenbergh, Nils | Zukertort Opening: Sicilian Invitation | |
| Dec 29, 2025 | Heldenbergh | * | Mrozowski | Round 4: Heldenbergh, Nils - Mrozowski, Nikodem | ? | |
| Dec 29, 2025 | Di Girolamo | * | Heldenbergh | Round 3: Di Girolamo, Nicolo` - Heldenbergh, Nils | ? | |
| Dec 28, 2025 | Solodovnichenko | 1–0 | Heldenbergh | Round 1: Solodovnichenko, Yuri - Heldenbergh, Nils | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Dec 28, 2025 | Heldenbergh | * | Van Amerongen | Round 2: Heldenbergh, Nils - Van Amerongen, Arjen | ? | |
| Oct 19, 2025 | Heldenbergh | 0–1 | Pijpers | Round 1: Heldenbergh, Nils - Pijpers, Arthur | Sicilian Defense: Accelerated Dragon, Modern Variation | |
| Sep 14, 2025 | Signorelli | 1–0 | Heldenbergh | Round 5: Signorelli, Gaetano - Heldenbergh, Nils | Sicilian Defense: Old Sicilian | |
| Sep 13, 2025 | Heldenbergh | ½–½ | Belli | Round 4: Heldenbergh, Nils - Belli, Giorgio | Sicilian Defense: Najdorf Variation | |
| Sep 13, 2025 | Colonetti | ½–½ | Heldenbergh | Round 3: Colonetti, Fabio - Heldenbergh, Nils | Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch | |
| Sep 12, 2025 | Ypma | ½–½ | Heldenbergh | Round 1: Ypma, Jord - Heldenbergh, Nils | Queen's Pawn Game: London System, with e6 | |
| Sep 12, 2025 | Heldenbergh | 0–1 | Menon | Round 2: Heldenbergh, Nils - Menon, Sanjay | Philidor Defense: Exchange Variation | |
| Jun 6, 2025 | Docx | 1–0 | Heldenbergh | Round 1: Docx, Stefan - Heldenbergh, Nils | English Opening: Agincourt Defense, Catalan Defense | |
| May 28, 2023 | Heldenbergh | * | Beeke | Limburg Open | ? | |
| May 28, 2023 | Tabak | * | Heldenbergh | Limburg Open | ? | |
| Mar 31, 2023 | Heldenbergh | * | Sigurthorsson | Reykjavik Open | ? | |
| Mar 30, 2023 | Gajewski | 1–0 | Heldenbergh | Reykjavik Open 2023 | Zukertort Opening: Reversed Grünfeld | |
| Mar 29, 2023 | Ioannidis | 1–0 | Heldenbergh | Reykjavik Open 2023 | Queen's Gambit Declined: Janowski Variation | |
| — | Heldenbergh | 1–0 | Festraerts | Round 2: Heldenbergh, Nils - Festraerts, Len | Sicilian Defense: Kalashnikov Variation | |
| — | Heldenbergh | 0–1 | Anciaux | Round 4: Heldenbergh, Nils - Anciaux, Adrien | Sicilian Defense: Scheveningen Variation, Classical Main Line | |
| — | Heldenbergh | 0–1 | Anciaux | Round 5: Heldenbergh, Nils - Anciaux, Adrien | Sicilian Defense: Scheveningen Variation, Classical Main Line | |
| — | Heldenbergh | 1–0 | Festraerts | Round 5: Heldenbergh, Nils - Festraerts, Len | Sicilian Defense: Kalashnikov Variation | |
| — | Heldenbergh | 1–0 | Deleu | Round 6: Heldenbergh, Nils - Deleu, Leen | Modern Defense: Standard Line | |
| — | Heldenbergh | ½–½ | Raats | Round 8: Heldenbergh, Nils - Raats, Joppe | Bishop's Opening: Vienna Hybrid, Spielmann Attack | |
| — | Heldenbergh | ½–½ | Dreelinck | Round 9: Heldenbergh, Nils - Dreelinck, Adriaan | French Defense: King's Indian Attack | |
| — | Boissel | ½–½ | Heldenbergh | Round 1: Boissel, Kasimir - Heldenbergh, Nils | Queen's Gambit Declined: Janowski Variation | |
| — | Debucke | 0–1 | Heldenbergh | Round 3: Debucke, Jolan - Heldenbergh, Nils | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| — | De Rycke | * | Heldenbergh | Round 5: De Rycke, Tyani - Heldenbergh, Nils | Sicilian Defense: Closed, Fianchetto Variation | |
| — | Debucke | 0–1 | Heldenbergh | Round 5: Debucke, Jolan - Heldenbergh, Nils | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| — | Boissel | ½–½ | Heldenbergh | Round 5: Boissel, Kasimir - Heldenbergh, Nils | Queen's Gambit Declined: Janowski Variation | |
| — | Van Hoey | ½–½ | Heldenbergh | Round 7: Van Hoey, Luca - Heldenbergh, Nils | Sicilian Defense: Mengarini Variation | |