| Jun 28, 2026 | Haver | ½–½ | Iolis | Round 5: Haver, Bas - Iolis, Oleg | English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation | |
| Jun 28, 2026 | Iolis | 0–1 | Zwirs | Round 4: Iolis, Oleg - Zwirs, Nico | Sicilian Defense: Najdorf Variation, English Attack | |
| Jun 27, 2026 | Guillaumond | ½–½ | Iolis | Round 3: Guillaumond, Matthieu - Iolis, Oleg | Sicilian Defense: Najdorf Variation | |
| Jun 27, 2026 | Iolis | 1–0 | Stolwijk | Round 2: Iolis, Oleg - Stolwijk, Colin | Caro-Kann Defense: Advance Variation, Short Variation | |
| Jun 27, 2026 | Fasel | * | Iolis | Round 1: Fasel, Ton - Iolis, Oleg | ? | |
| Jun 19, 2026 | Beerdsen | 1–0 | Iolis | HSG Open 2026 A | Sicilian Defense: Najdorf Variation | |
| Jun 6, 2026 | Iolis | 0–1 | Neurohr | Round 5: Iolis, Oleg - Neurohr, Juergen | Scotch Game: Mieses Variation | |
| Jun 5, 2026 | Coenen | 1–0 | Iolis | Round 4: Coenen, Michael - Iolis, Oleg | Grünfeld Defense: Russian Variation, Byrne Variation | |
| May 25, 2026 | Iolis | * | Mostertman | Round 7: Iolis, Oleg - Mostertman, Milan | ? | |
| May 25, 2026 | Van Doren | * | Iolis | Round 6: Van Doren, Bas - Iolis, Oleg | ? | |
| May 24, 2026 | Iolis | * | Meessen | Round 5: Iolis, Oleg - Meessen, Rudolf | ? | |
| May 24, 2026 | Lazrak | * | Iolis | Round 4: Lazrak, Sami - Iolis, Oleg | ? | |
| May 23, 2026 | Iolis | * | Kagan | Round 3: Iolis, Oleg - Kagan, Dennis | ? | |
| May 23, 2026 | Pirard | * | Iolis | Round 2: Pirard, Natan - Iolis, Oleg | ? | |
| Oct 24, 2025 | Iolis | 0–1 | Lahaye | Amsterdam Chess Open 2025 | Sicilian Defense: Najdorf Variation, English Attack | |
| Jul 21, 2025 | Ghyselen | 1–0 | Iolis | Round 6: Ghyselen, Wouter - Iolis, Oleg | Trompowsky Attack | |
| Jun 1, 2025 | Capone | 1–0 | Iolis | Round 7: Capone, Nicola - Iolis, Oleg | Sicilian Defense: Najdorf Variation, Zagreb Variation | |
| May 31, 2025 | Iolis | 1–0 | Raptis | Round 5: Iolis, Oleg - Raptis, Filippos | Sicilian Defense: Kalashnikov Variation | |
| May 30, 2025 | Vermoesen | 0–1 | Iolis | Round 4: Vermoesen, Jordan - Iolis, Oleg | Sicilian Defense: Najdorf Variation, English Attack | |
| May 30, 2025 | Iolis | ½–½ | Toledo | Round 3: Iolis, Oleg - Toledo, Hillel | Sicilian Defense: Lasker-Pelikan Variation | |
| May 30, 2025 | Hauchamps | 1–0 | Iolis | Round 2: Hauchamps, Maxime - Iolis, Oleg | Sicilian Defense: Najdorf Variation, Adams Attack | |
| May 30, 2025 | Le Quang | ½–½ | Iolis | Round 6: Le Quang, Kim - Iolis, Oleg | English Opening: King's English Variation | |
| May 30, 2025 | Iolis | 1–0 | Gulbas | Round 1: Iolis, Oleg - Gulbas, Cemil | French Defense: Advance Variation, Paulsen Attack | |
| Jul 12, 2024 | Froeyman | 1–0 | Iolis | Round 7: Froeyman, Helmut - Iolis, Oleg | Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line | |
| Jul 11, 2024 | Iolis | ½–½ | Hamblok | Round 6: Iolis, Oleg - Hamblok, Roel | French Defense: Advance Variation | |
| Jun 21, 2024 | Iolis | 0–1 | Vrolijk | Round 2: Iolis, Oleg - Vrolijk, Liam | Ruy Lopez: Fianchetto Defense | |
| Jun 1, 2024 | Neubauer | * | Iolis | Round 5: Neubauer, Juergen - Iolis, Oleg | ? | |
| May 31, 2024 | Iolis | 0–1 | Barzen | Round 4: Iolis, Oleg - Barzen, Pascal | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| May 31, 2024 | Gasber | * | Iolis | Round 3: Gasber, Johannes - Iolis, Oleg | ? | |
| May 30, 2024 | Iolis | * | Simon | Round 2: Iolis, Oleg - Simon, Jonathan | ? | |
| Apr 10, 2024 | Debucke | 1–0 | Iolis | Round 5: Debucke, Jolan - Iolis, Oleg | Sicilian Defense: Wing Gambit | |
| Apr 9, 2024 | Iolis | ½–½ | Maes | Round 4: Iolis, Oleg - Maes, Tibo | Sicilian Defense: Kalashnikov Variation | |
| Apr 8, 2024 | Iolis | 1–0 | Van Elsacker | Round 2: Iolis, Oleg - Van Elsacker, Jasper | Sicilian Defense: Najdorf Variation, English Attack, Anti-English | |
| Apr 8, 2024 | Dhooge | ½–½ | Iolis | Round 3: Dhooge, Servaas - Iolis, Oleg | Sicilian Defense: Najdorf Variation, Freak Attack | |
| Apr 7, 2024 | Debaere | 0–1 | Iolis | Round 1: Debaere, Thomas - Iolis, Oleg | Sicilian Defense: Alapin Variation | |
| Apr 1, 2024 | Heinemann | ½–½ | Iolis | Round 8: Heinemann, Ernst - Iolis, Oleg | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Mar 31, 2024 | Iolis | ½–½ | Korneev | Round 7: Iolis, Oleg - Korneev, Oleg | Sicilian Defense: Taimanov Variation | |
| Mar 31, 2024 | Iolis | 1–0 | Huesmann | Round 6: Iolis, Oleg - Huesmann, Thomas | Ruy Lopez: Open, Main Line | |
| Mar 30, 2024 | Schaefers | 0–1 | Iolis | Round 5: Schaefers, Andreas - Iolis, Oleg | English Opening: Symmetrical Variation, Rubinstein Variation | |
| Mar 30, 2024 | Iolis | 0–1 | Pijpers | Round 4: Iolis, Oleg - Pijpers, Arthur | Sicilian Defense: Richter-Rauzer Variation, Vitolins Variation | |
| Mar 29, 2024 | Reichardt | 0–1 | Iolis | Round 3: Reichardt, Robin - Iolis, Oleg | Grünfeld Defense: Three Knights Variation | |
| Mar 29, 2024 | Iolis | 1–0 | Grosser | Round 2: Iolis, Oleg - Grosser, Walter | Scandinavian Defense: Gubinsky-Melts Defense | |
| Mar 28, 2024 | Hagenhoff | 0–1 | Iolis | Round 1: Hagenhoff, Georg - Iolis, Oleg | Polish Opening | |
| Mar 2, 2024 | Iolis | * | Gopal G.N. | Round 1: Iolis, Oleg - Gopal G.N. | Sicilian Defense: Najdorf Variation, English Attack | |
| Nov 9, 2024 | Iolis | 0–1 | Sipila | Round 2: Iolis, Oleg - Sipila, Vilka | French Defense: Steinitz Variation, Boleslavsky Variation | |
| — | Iolis | 1–0 | Van Zon | WLC 2022 A | Sicilian Defense: Lasker-Pelikan Variation | |
| — | Iolis | 0–1 | Verhoeven | WLC 2022 A | Scandinavian Defense: Modern Variation | |
| — | Iolis | * | Bye | WLC 2022 A | ? | |
| — | Iolis | 1–0 | Smit | WLC 2022 A | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| — | Iolis | 0–1 | Peeters | Open Geraardsbergen 2025 | Sicilian Defense: Najdorf Variation, English Attack | |
| — | Boeren | ½–½ | Iolis | WLC 2022 A | Sicilian Defense: Najdorf Variation, Adams Attack | |
| — | Becx | ½–½ | Iolis | WLC 2022 A | Bird Opening | |
| — | Bauer | ½–½ | Iolis | 41e Open International de Cappelle | East Indian Defense | |