| — | Van Dael | ½–½ | Szakolczai | new tournament description | Sicilian Defense: Alapin Variation | |
| — | Wiechert | 0–1 | Van Dael | Grenke Open | East Indian Defense | |
| — | Hoffmann | 1–0 | Van Dael | new tournament description | King's Indian Defense: Averbakh Variation, Main Line | |
| May 17, 2026 | Van Dael | 0–1 | Milanovic | Round 5: Van Dael, Siem - Milanovic, Danilo | Scandinavian Defense: Gubinsky-Melts Defense | |
| May 17, 2026 | Van Dael | * | Dornauer | Round 2: Van Dael, Siem - Dornauer, Joachim | ? | |
| May 15, 2026 | Van Dael | 0–1 | Kadric | Round 9: Van Dael, Siem - Kadric, Denis | Philidor Defense: Lion Variation | |
| May 15, 2026 | Van Dael | 0–1 | Santos Latasa | Round 2: Van Dael, Siem - Santos Latasa, Jaime | Sicilian Defense: Najdorf Variation, English Attack | |
| May 14, 2026 | Henriquez Villagra | 1–0 | Van Dael | Round 5: Henriquez Villagra, Cristobal - Van Dael, Siem | Sicilian Defense: Najdorf Variation, Adams Attack | |
| May 14, 2026 | Subelj | 1–0 | Van Dael | Round 3: Subelj, Jan - Van Dael, Siem | Sicilian Defense: Moscow Variation, Main Line | |
| Apr 11, 2026 | Vrolijk | 1–0 | Van Dael | Round 9: Vrolijk, Liam - Van Dael, Siem | King's Indian Defense: Normal Variation, Standard Development | |
| Apr 6, 2026 | Pajeken | * | Van Dael | Grenke Chess Festival 2026 Open | English Opening: Agincourt Defense | |
| Apr 6, 2026 | Van Dael | 1–0 | Karacsonyi | Grenke Chess Festival 2026 Open | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Apr 5, 2026 | Dobrosmyslov | 0–1 | Van Dael | Grenke Chess Festival 2026 Open | King's Indian Defense: Normal Variation, Rare Defenses | |
| Apr 5, 2026 | Van Dael | 0–1 | Zeng | Grenke Chess Festival 2026 Open | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| Apr 4, 2026 | Beerdsen | ½–½ | Van Dael | Grenke Chess Festival 2026 Open | Sicilian Defense: Najdorf Variation, Amsterdam Variation | |
| Apr 4, 2026 | Van Dael | 1–0 | Fuchs | Grenke Chess Festival 2026 Open | French Defense: Classical Variation, Burn Variation, Morozevich Line | |
| Mar 28, 2026 | Kokje | 0–1 | Van Dael | Round 6: Kokje, Joris - Van Dael, Siem | Benoni Defense: King's Pawn Line, with Nge2 | |
| Mar 7, 2026 | Van Dael | 1–0 | Van Rootselaar | Round 8: Van Dael, Siem - Van Rootselaar, Rik | Sicilian Defense: Kalashnikov Variation | |
| Feb 7, 2026 | Ritzerveld | 0–1 | Van Dael | Round 7: Ritzerveld, Noah - Van Dael, Siem | Sicilian Defense: Scheveningen Variation, Classical Variation | |
| Nov 22, 2025 | Rijnaarts | 0–1 | Van Dael | Round 4: Rijnaarts, Sjef - Van Dael, Siem | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Oct 4, 2025 | Heemskerk | 0–1 | Van Dael | Round 2: Heemskerk, Wim - Van Dael, Siem | King's Indian Attack: Symmetrical Defense | |
| May 13, 2025 | Van Dael | ½–½ | Labruyere | KNSB Meesterklasse 2024-2025 | Sicilian Defense: Alapin Variation | |
| Apr 5, 2025 | Van der Werf | 1–0 | Van Dael | Round 8: Van der Werf, Mark - Van Dael, Siem | King's Indian Defense: Orthodox Variation, Gligoric-Taimanov System | |
| Mar 8, 2025 | Van Dael | 0–1 | Pham | Round 7: Van Dael, Siem - Pham, Khoi | Sicilian Defense: Najdorf Variation, English Attack | |
| Nov 23, 2024 | Lommers | 1–0 | Van Dael | KNSB Meesterklasse 2024-2025 | Sicilian Defense: Moscow Variation, Main Line | |
| Mar 17, 2024 | Chow | ½–½ | Van Dael | Round 8: Chow, Samuel - Van Dael, Siem | King's Indian Defense: Orthodox Variation | |
| Mar 16, 2024 | Van Dael | 0–1 | Khoury | Round 7: Van Dael, Siem - Khoury, Theo | Sicilian Defense: Alapin Variation | |
| Dec 14, 2024 | Dreelinck | 0–1 | Van Dael | Round 5: Dreelinck, Adriaan - Van Dael, Siem | King's Indian Defense: Semi-Averbakh System | |
| Nov 9, 2024 | Van Dael | 1–0 | Beerdsen | Round 3: Van Dael, Siem - Beerdsen, Thomas | Caro-Kann Defense: Tartakower Variation | |
| Nov 2, 2024 | Govoreanu | 1–0 | Van Dael | Round 9: Govoreanu, Matei - Van Dael, Siem | Barnes Defense | |
| Nov 1, 2024 | Van Dael | 1–0 | Markuszewski | Round 8: Van Dael, Siem - Markuszewski, Maksymilian | Sicilian Defense: Najdorf Variation, English Attack | |
| Oct 31, 2024 | Vaupot | ½–½ | Van Dael | Round 7: Vaupot, Luka - Van Dael, Siem | Queen's Gambit Accepted: Classical Defense, Main Line | |
| Oct 30, 2024 | Van Dael | 0–1 | Kukushkin | Round 6: Van Dael, Siem - Kukushkin, Ivan | Kádas Opening | |
| Oct 30, 2024 | Madularea | 1–0 | Van Dael | Round 5: Madularea, David - Van Dael, Siem | Sicilian Defense: Lasker-Pelikan Variation | |
| Oct 29, 2024 | Van Dael | 1–0 | Yasmo | Round 4: Van Dael, Siem - Yasmo, Daniil | French Defense: Classical Variation, Burn Variation, Morozevich Line | |
| Oct 28, 2024 | Verheij | 0–1 | Van Dael | Round 3: Verheij, Dana - Van Dael, Siem | French Defense: Winawer Variation, Advance Variation | |
| Oct 27, 2024 | Van Dael | 0–1 | Bruggink | Round 2: Van Dael, Siem - Bruggink, Tycho | Sicilian Defense: Najdorf Variation, English Attack | |
| Oct 12, 2024 | De Winter | 1–0 | Van Dael | Round 2: De Winter, Arthur - Van Dael, Siem | Ruy Lopez: Morphy Defense, Modern Steinitz Defense | |
| Oct 28, 2023 | Van Dael | 1–0 | Van Foreest | Hoogeveen Open 2023 | Sicilian Defense: Four Knights Variation | |
| Oct 27, 2023 | Zwirs | ½–½ | Van Dael | Hoogeveen Open 2023 | Sicilian Defense: Closed | |
| Oct 26, 2023 | Van Dael | 1–0 | De Boer | Hoogeveen Open 2023 | French Defense: Classical Variation, Burn Variation, Morozevich Line | |
| Oct 25, 2023 | Swati | 0–1 | Van Dael | Hoogeveen Open 2023 | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Oct 25, 2023 | De Winter | ½–½ | Van Dael | Hoogeveen Open 2023 | Sicilian Defense: Najdorf Variation | |
| Oct 24, 2023 | Van Dael | 1–0 | Labruyere | Hoogeveen Open 2023 | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Oct 23, 2023 | Lodici | 1–0 | Van Dael | Hoogeveen Open 2023 | Sicilian Defense: Najdorf Variation, Amsterdam Variation | |
| Oct 21, 2023 | Van Dael | 1–0 | Hoffman | Hoogeveen Open 2023 | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Oct 1, 2023 | Van Dael | 0–1 | Nguyen | European Chess Club Cup 2023 | Sicilian Defense: Najdorf Variation, English Attack | |
| Aug 28, 2023 | Van Dael | 1–0 | Zuferi | WRTC | Sicilian Defense: Najdorf Variation, English Attack, Anti-English | |
| Aug 28, 2023 | Van Dael | ½–½ | Adly | WRTC | Sicilian Defense: Richter-Rauzer Variation, Modern Variation | |
| Aug 28, 2023 | Yelisieiev | 1–0 | Van Dael | WRTC | Indian Defense: Przepiorka Variation | |
| Aug 28, 2023 | Kraus | 0–1 | Van Dael | WRTC | Sicilian Defense: Moscow Variation, Main Line | |
| Aug 27, 2023 | Van Dael | 1–0 | Rendle | WRTC | French Defense: Alekhine-Chatard Attack, Albin-Chatard Gambit | |
| Aug 27, 2023 | Van Dael | 1–0 | Helbig | WRTC | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Aug 27, 2023 | Pak | 1–0 | Van Dael | WRTC | Nimzo-Larsen Attack: Indian Variation | |
| Aug 27, 2023 | Haasler | 1–0 | Van Dael | WRTC | King's Indian Attack: Symmetrical Defense | |
| Aug 26, 2023 | Van Dael | ½–½ | Caruana | WRTC | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Aug 26, 2023 | Van Dael | 1–0 | Namale | WRTC | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Aug 26, 2023 | Li | 0–1 | Van Dael | WRTC | King's Indian Defense: Orthodox Variation, Positional Defense, Closed Line | |
| Aug 26, 2023 | Rodshtein | ½–½ | Van Dael | WRTC | King's Indian Defense: Makogonov Variation | |
| Aug 13, 2023 | Fernandez Barrera | * | Van Dael | CE_Segunda | ? | |
| Aug 6, 2023 | Krnic | 1–0 | Van Dael | 12. Split Open 05.-13.08.2023. | Sicilian Defense: Wing Gambit | |
| Aug 5, 2023 | Van Dael | 1–0 | Erceg | 12. Split Open 05.-13.08.2023. | Scandinavian Defense: Valencian Variation | |
| May 28, 2023 | Van Dael | * | Tiggelman | Limburg Open | ? | |
| May 28, 2023 | Koffeman | * | Van Dael | Limburg Open | ? | |
| Mar 22, 2023 | Van Dael | 1–0 | Caruso | Hit Open 2023 | French Defense: Winawer Variation, Warsaw Variation | |
| Mar 21, 2023 | Kozlovic | 1–0 | Van Dael | Hit Open 2023 | Sicilian Defense: Moscow Variation, Main Line | |
| Mar 20, 2023 | Van Dael | 1–0 | Cansu | Hit Open 2023 | Italian Game: Giuoco Pianissimo, Italian Four Knights Variation | |
| Mar 19, 2023 | Van Dael | 1–0 | Devnani | Hit Open 2023 | Caro-Kann Defense: Tartakower Variation | |
| Mar 19, 2023 | Brunello | 1–0 | Van Dael | 27th HIT Open | King's Indian Defense: Sämisch Variation, Sämisch Gambit | |
| Mar 18, 2023 | Perossa | 0–1 | Van Dael | Hit Open 2023 | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Mar 17, 2023 | Van Dael | 0–1 | Strikovic | Hit Open 2023 | Philidor Defense: Lion Variation | |
| Mar 16, 2023 | Praznik | 0–1 | Van Dael | Hit Open 2023 | Sicilian Defense: Moscow Variation, Main Line | |
| Mar 16, 2023 | Gregoric | ½–½ | Van Dael | Hit Open 2023 | Sicilian Defense: Chekhover Variation | |
| Mar 12, 2023 | Babazada | 1–0 | Van Dael | European Championship | ? | |
| Mar 3, 2023 | Van Dael | 0–1 | Rodshtein | European Championship | Sicilian Defense: Richter-Rauzer Variation, Classical Variation | |
| Dec 31, 2022 | Kulaots | 1–0 | Van Dael | 50th Rilton Cup | Sicilian Defense: Najdorf Variation | |
| Dec 30, 2022 | Van Dael | ½–½ | Keinanen | 50th Rilton Cup | French Defense: Burn Variation | |
| Sep 22, 2022 | Sonis | 1–0 | Van Dael | Hit Open 2022 | King's Indian Defense: Semi-Averbakh System | |
| Sep 21, 2022 | Van Dael | 1–0 | Gregoric | Hit Open 2022 | Italian Game: Classical Variation, Center Attack | |
| Sep 20, 2022 | Holtel | 1–0 | Van Dael | Hit Open 2022 | King's Indian Attack: Symmetrical Defense | |
| Sep 19, 2022 | Van Dael | 1–0 | Krivenko | Hit Open 2022 | Sicilian Defense: Four Knights Variation | |
| Sep 18, 2022 | Van Dael | ½–½ | Diermair | Hit Open 2022 | French Defense: Winawer Variation, Classical Variation | |
| Sep 18, 2022 | Thybo | ½–½ | Van Dael | Hit Open 2022 | Ruy Lopez: Closed, Anti-Marshall | |
| Sep 17, 2022 | Van Dael | ½–½ | Ghazarian | Hit Open 2022 | Sicilian Defense: Najdorf Variation, English Attack | |
| Sep 17, 2022 | Davies | ½–½ | Van Dael | Hit Open 2022 | Hungarian Opening: Symmetrical Variation | |
| Sep 16, 2022 | Lodici | 0–1 | Van Dael | 26th HIT Open | King's Indian Defense: Makogonov Variation | |
| Jun 12, 2022 | Iniyan | 1–0 | Van Dael | Prague Chess Festival - Open | King's Indian Defense: Makogonov Variation | |
| Apr 16, 2022 | Sabuk | 1–0 | Van Dael | Round 6: Sabuk, Piotr - Van Dael, Siem | King's Indian Defense: Normal Variation, Rare Defenses | |
| Apr 15, 2022 | Aagaard Jacob | 1–0 | Van Dael | Round 4: Aagaard Jacob - Van Dael, Siem | Sicilian Defense: Modern Variations | |
| Apr 6, 2022 | Kaasen | 1–0 | Van Dael | EICC 22 | Modern Defense: Standard Defense | |
| Apr 5, 2022 | Van Dael | 0–1 | Yilmazyerli | European Championship | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Apr 4, 2022 | Holm | ½–½ | Van Dael | EICC 22 | King's Indian Defense: Smyslov Variation | |
| Mar 28, 2022 | Van Dael | 0–1 | Jobava | EICC 22 | Caro-Kann Defense: Modern Variation | |
| Feb 27, 2022 | Van Dael | 1–0 | Nikolic | Krageroe Resort Chess 2022 | Italian Game: Giuoco Pianissimo, Normal | |
| Feb 26, 2022 | Van Dael | ½–½ | Osmak | Krageroe Resort Chess 2022 | French Defense: Burn Variation | |
| Feb 26, 2022 | Reimanis | ½–½ | Van Dael | Krageroe Resort Chess 2022 | English Opening: Anglo-Indian Defense, King's Indian Formation | |
| Feb 25, 2022 | Thanke | ½–½ | Van Dael | Krageroe Resort Chess 2022 | King's Indian Defense: Orthodox Variation | |
| Feb 25, 2022 | Johannsson | 0–1 | Van Dael | Krageroe Resort Chess 2022 | King's Indian Defense: Makogonov Variation | |
| Feb 24, 2022 | Van Dael | 1–0 | Krivenko | Krageroe Resort Chess 2022 | Sicilian Defense: Godiva Variation | |
| Feb 24, 2022 | Van Dael | 0–1 | Fridman | Krageroe Resort Chess 2022 | Alekhine Defense: Exchange Variation | |