| Jun 28, 2026 | Bagrationi | 1–0 | Mostertman | Round 5: Bagrationi, Alexander - Mostertman, Milan | Ruy Lopez: Morphy Defense, Cozio Defense | |
| Jun 28, 2026 | Mostertman | 1–0 | Schilstra | Round 4: Mostertman, Milan - Schilstra, Laurens | Caro-Kann Defense: Classical Variation, Main Line | |
| Jun 27, 2026 | Pathak | 0–1 | Mostertman | Round 3: Pathak, Raghav - Mostertman, Milan | French Defense: Advance Variation, Lputian Variation | |
| Jun 21, 2026 | Mostertman | 1–0 | Hallibert | HSG Open 2026 A | Sicilian Defense: Najdorf Variation, Zagreb Variation | |
| Jun 21, 2026 | Van Helvoort | 1–0 | Mostertman | HSG Open 2026 A | Scandinavian Defense: Gubinsky-Melts Defense | |
| Jun 20, 2026 | De Winter | 1–0 | Mostertman | HSG Open 2026 A | Tarrasch Defense: Dubov Tarrasch | |
| Jun 19, 2026 | Mostertman | 1–0 | Zhang | HSG Open 2026 A | Sicilian Defense: French Variation | |
| May 25, 2026 | Iolis | * | Mostertman | Round 7: Iolis, Oleg - Mostertman, Milan | ? | |
| May 25, 2026 | Mostertman | 0–1 | Noordenbos | Round 6: Mostertman, Milan - Noordenbos, Daan | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| May 24, 2026 | Lenaerts | 1–0 | Mostertman | Round 5: Lenaerts, Lennert - Mostertman, Milan | Nimzo-Indian Defense: Romanishin Variation | |
| May 24, 2026 | Mostertman | 1–0 | Perkampus | Round 4: Mostertman, Milan - Perkampus, Laurin | Sicilian Defense: Four Knights Variation | |
| May 23, 2026 | Guliyev | 1–0 | Mostertman | Round 3: Guliyev, Namig - Mostertman, Milan | French Defense: Steinitz Variation, Boleslavsky Variation | |
| May 23, 2026 | Mostertman | 1–0 | Villwock | Round 2: Mostertman, Milan - Villwock, Martin | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| May 22, 2026 | Janse | * | Mostertman | Round 1: Janse, Jan Jaap - Mostertman, Milan | ? | |
| May 17, 2026 | Botter | 0–1 | Mostertman | Round 7: Botter, Simon - Mostertman, Milan | King's Indian Attack: Spassky Variation | |
| May 17, 2026 | Mostertman | 1–0 | Blok | Round 6: Mostertman, Milan - Blok, Xaveer | Sicilian Defense: Najdorf Variation, Zagreb Variation | |
| May 15, 2026 | Koukas | 0–1 | Mostertman | Round 3: Koukas, Anastasios - Mostertman, Milan | French Defense: Exchange Variation | |
| May 14, 2026 | Mostertman | 1–0 | Leenes | Round 2: Mostertman, Milan - Leenes, Robert | Sicilian Defense: Four Knights Variation | |
| May 14, 2026 | Van de Poel | 0–1 | Mostertman | Round 1: Van de Poel, Taco - Mostertman, Milan | Sicilian Defense: Accelerated Dragon, Maróczy Bind, Gurgenidze Variation | |
| May 13, 2026 | De Rover | ½–½ | Mostertman | Round 5: De Rover, Yong Hoon - Mostertman, Milan | French Defense: Exchange Variation | |
| May 13, 2026 | Mostertman | ½–½ | Slagboom | Round 4: Mostertman, Milan - Slagboom, Leandro | Italian Game: Giuoco Pianissimo, Normal | |
| May 10, 2026 | Mostertman | ½–½ | Grooten | Ronde 6: Mostertman, Milan - Grooten, Tommy | Sicilian Defense: Najdorf Variation, English Attack | |
| May 10, 2026 | Mostertman | 1–0 | Cornelisse | Ronde 5: Mostertman, Milan - Cornelisse, Lorelei | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| May 9, 2026 | Beerdsen | 1–0 | Mostertman | Ronde 4: Beerdsen, Thomas - Mostertman, Milan | French Defense: Advance Variation, Milner-Barry Gambit, Hector Variation | |
| May 9, 2026 | Milan Mostertman | 1–0 | Xiheng Zhang | Ronde 3: Milan Mostertman - Xiheng Zhang | Sicilian Defense: Delayed Alapin Variation | |
| May 9, 2026 | Nino Messaoudi | 0–1 | Milan Mostertman | Ronde 2: Nino Messaoudi - Milan Mostertman | Nimzo-Indian Defense: Kmoch Variation | |
| May 8, 2026 | Milan Mostertman | 1–0 | Leon De Vries | Round 1: Milan Mostertman - Leon De Vries | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Apr 11, 2026 | Mostertman | 0–1 | Zhu | Round 9: Mostertman, Milan - Zhu, Chenwu | Sicilian Defense: Najdorf Variation, English Attack | |
| Mar 28, 2026 | Mostertman | 1–0 | Kindt | Round 6: Mostertman, Milan - Kindt, Manfred | Four Knights Game: Gunsberg Variation | |
| Mar 7, 2026 | Terlouw | 0–1 | Mostertman | Round 8: Terlouw, Wouter - Mostertman, Milan | Trompowsky Attack | |
| Feb 22, 2026 | Grooten | 1–0 | Mostertman | Round 5: Grooten, Tommy - Mostertman, Milan | English Opening: Neo-Catalan | |
| Feb 21, 2026 | De Winter | ½–½ | Mostertman | Round 3: De Winter, Arthur - Mostertman, Milan | French Defense: Exchange Variation | |
| Feb 7, 2026 | Mostertman | 0–1 | Albers | Round 7: Mostertman, Milan - Albers, Sasa | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations | |
| Nov 22, 2025 | Van Batenburg | ½–½ | Mostertman | Round 4: Van Batenburg, Mees - Mostertman, Milan | French Defense: Classical Variation, Shirov-Anand Variation | |
| Oct 25, 2025 | Mostertman | 1–0 | Labruyere | Round 9: Mostertman, Milan - Labruyere, Roger | Sicilian Defense: Najdorf Variation, English Attack | |
| Oct 24, 2025 | Mostertman | 1–0 | Bakija | Round 8: Mostertman, Milan - Bakija, Alan | Philidor Defense: Lion Variation | |
| Oct 23, 2025 | Grooten | 1–0 | Mostertman | Round 7: Grooten, Tommy - Mostertman, Milan | Catalan Opening: Closed | |
| Oct 22, 2025 | Mostertman | 0–1 | Harshavardhan G B | Round 6: Mostertman, Milan - Harshavardhan G B | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| Oct 21, 2025 | Makhynia | 0–1 | Mostertman | Round 5: Makhynia, Kostiantyn - Mostertman, Milan | Indian Defense: Anti-Nimzo-Indian | |
| Oct 21, 2025 | Mostertman | 1–0 | Fikh | Round 4: Mostertman, Milan - Fikh, Anthony | Caro-Kann Defense: Tartakower Variation | |
| Oct 20, 2025 | Aamuktha Guntaka | ½–½ | Mostertman | Round 3: Aamuktha Guntaka - Mostertman, Milan | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Oct 19, 2025 | Mostertman | 1–0 | Van de Pavoordt | Round 2: Mostertman, Milan - Van de Pavoordt, Max | French Defense: Schlechter Variation | |
| Oct 18, 2025 | Odenthal | 1–0 | Mostertman | Round 1: Odenthal, Aidan - Mostertman, Milan | Queen's Gambit Declined: Ragozin Defense | |
| Jul 28, 2025 | Zeng | 1–0 | Mostertman | Round 1: Zeng, Chongsheng - Mostertman, Milan | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Jul 24, 2025 | Latorre | 1–0 | Mostertman | Biel Chess Festival 2025 MTO | King's Indian Attack: Spassky Variation | |
| Jul 23, 2025 | Mostertman | ½–½ | Song | Biel Chess Festival 2025 MTO | Four Knights Game: Gunsberg Variation | |
| Jul 22, 2025 | Panchanathan | 1–0 | Mostertman | Biel Chess Festival 2025 MTO | Queen's Pawn Game: Colle System | |
| Jul 21, 2025 | Mostertman | 1–0 | Lacan Rus | Biel Chess Festival 2025 MTO | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Jul 19, 2025 | Bok | ½–½ | Mostertman | Biel Chess Festival 2025 MTO | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Jul 18, 2025 | Mostertman | 1–0 | Vemparala | Biel Chess Festival 2025 MTO | Italian Game: Giuoco Pianissimo, Italian Four Knights Variation | |
| Jul 17, 2025 | Karthik Venkataraman | 1–0 | Mostertman | Biel Chess Festival 2025 MTO | Queen's Pawn Game: Colle System | |
| Jul 16, 2025 | Mostertman | 1–0 | Snodgrass | Biel Chess Festival 2025 MTO | Philidor Defense: Lion Variation | |
| Jul 15, 2025 | Mostertman | ½–½ | Dau Khuong Duy | Biel Chess Festival 2025 MTO | Sicilian Defense: Delayed Alapin Variation | |
| Jul 14, 2025 | Cordes | 0–1 | Mostertman | Biel Chess Festival 2025 MTO | Queen's Gambit Declined: Ragozin Defense, Alekhine Variation | |
| Jun 1, 2025 | Mostertman | 0–1 | Van de Griendt | Round 6: Mostertman, Milan - Van de Griendt, Jan Willem | Italian Game: Paris Defense | |
| Jun 1, 2025 | Mostertman | ½–½ | Lombaers | Round 5: Mostertman, Milan - Lombaers, Peter | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| May 31, 2025 | Mostertman | 1–0 | De Jong | Round 3: Mostertman, Milan - De Jong, Tom | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| May 30, 2025 | Smeets | 0–1 | Mostertman | Round 4: Smeets, Kobe - Mostertman, Milan | French Defense: Steinitz Variation, Boleslavsky Variation | |
| May 18, 2025 | Thijssen | 0–1 | Mostertman | Round 6: Thijssen, Freek - Mostertman, Milan | French Defense: Exchange Variation | |
| May 18, 2025 | Mostertman | ½–½ | Baselmans | Round 5: Mostertman, Milan - Baselmans, Luuk | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| May 17, 2025 | Issaad | 0–1 | Mostertman | Round 4: Issaad, Pascal - Mostertman, Milan | Bird Opening: Dutch Variation | |
| May 17, 2025 | Mostertman | 1–0 | Wuijts | Round 3: Mostertman, Milan - Wuijts, Johan | French Defense: Advance Variation, Euwe Variation | |
| May 17, 2025 | Ercan | 1–0 | Mostertman | Round 2: Ercan, Selman - Mostertman, Milan | Bogo-Indian Defense: Retreat Variation | |
| May 16, 2025 | Mostertman | 1–0 | De Witte | Round 1: Mostertman, Milan - De Witte, Wiebe | Philidor Defense: Lion Variation | |
| Apr 21, 2025 | Mostertman | ½–½ | Grigoriants | Freestyle Chess Open A | ? | |
| Apr 21, 2025 | Pantzar | 0–1 | Mostertman | Freestyle Chess Open A | ? | |
| Apr 17, 2025 | Mostertman | 0–1 | Nepomniachtchi | Round 1: Mostertman, Milan - Nepomniachtchi, Ian | ? | |
| Mar 8, 2025 | Bosman | 1–0 | Mostertman | Round 7: Bosman, Michiel - Mostertman, Milan | Bogo-Indian Defense: Retreat Variation | |
| Nov 24, 2024 | Mostertman | 1–0 | Tschernatsch | Heusenstamm Sparkassen Open 2024 | Sicilian Defense: Najdorf Variation, English Attack | |
| Nov 22, 2024 | Mostertman | 0–1 | Peng | Heusenstamm Sparkassen Open 2024 | Sicilian Defense: Alapin Variation | |
| Aug 6, 2024 | Durak | 1–0 | Mostertman | RTU Open - A | Sicilian Defense: Alapin Variation | |
| Jul 25, 2024 | Toktomushev | 1–0 | Mostertman | Biel Chess Festival MTO | Semi-Slav Defense: Chigorin Defense | |
| Jul 24, 2024 | Mostertman | 1–0 | Arsenie | Biel Chess Festival MTO | Sicilian Defense: Najdorf Variation, English Attack | |
| Jul 23, 2024 | Boldoo | ½–½ | Mostertman | Biel Chess Festival MTO | Semi-Slav Defense: Quiet Variation | |
| Jul 22, 2024 | Mostertman | 0–1 | Chinguun | Biel Chess Festival MTO | Sicilian Defense: Najdorf Variation, English Attack | |
| Jul 20, 2024 | Vantika Agrawal | 0–1 | Mostertman | Biel Chess Festival MTO | Semi-Slav Defense: Quiet Variation | |
| Jul 19, 2024 | Mostertman | 1–0 | Pisan | Biel Chess Festival MTO | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Jul 17, 2024 | Mostertman | 0–1 | Fronda | Biel Chess Festival MTO | Sicilian Defense: Dragon Variation, Yugoslav Attack, Early Deviations | |
| Jul 16, 2024 | Panda | ½–½ | Mostertman | Biel Chess Festival MTO | English Opening: Caro-Kann Defensive System | |
| Jul 15, 2024 | Mostertman | 0–1 | Ganguly | Biel Chess Festival MTO | Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line | |
| Jun 23, 2024 | Mostertman | 0–1 | Van Rootselaar | Round 6: Mostertman, Milan - Van Rootselaar, Rik | Sicilian Defense: Kalashnikov Variation | |
| Jun 21, 2024 | Vrolijk | 1–0 | Mostertman | Round 3: Vrolijk, Liam - Mostertman, Milan | King's Indian Attack: Double Fianchetto | |
| Dec 26, 2024 | Kollen | 1–0 | Mostertman | Round 5: Kollen, Zyon - Mostertman, Milan | Ruy Lopez: Berlin Defense | |
| Dec 24, 2024 | Mostertman | ½–½ | Stijve | Round 4: Mostertman, Milan - Stijve, Theo | French Defense: Tarrasch Variation | |
| Dec 23, 2024 | Mostertman | 1–0 | Duson | Round 3: Mostertman, Milan - Duson, Robin | Four Knights Game | |
| Dec 22, 2024 | Mitusov | 1–0 | Mostertman | Round 2: Mitusov, Semen - Mostertman, Milan | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Dec 21, 2024 | Mostertman | ½–½ | Kazakouski | Round 1: Mostertman, Milan - Kazakouski, Valery | Sicilian Defense: Najdorf Variation, English Attack | |
| Nov 2, 2024 | Mostertman | ½–½ | De Winter | Round 9: Mostertman, Milan - De Winter, Arthur | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Nov 1, 2024 | Mostertman | 1–0 | Govoreanu | Round 8: Mostertman, Milan - Govoreanu, Matei | Sicilian Defense: Kalashnikov Variation | |
| Oct 31, 2024 | Bruggink | 0–1 | Mostertman | Round 7: Bruggink, Tycho - Mostertman, Milan | Sicilian Defense: Closed, Traditional | |
| Oct 30, 2024 | Mostertman | 1–0 | Wildschut | Round 5: Mostertman, Milan - Wildschut, Marcel | French Defense: Tarrasch Variation, Open System, Main Line | |
| Oct 30, 2024 | Boeren | ½–½ | Mostertman | Round 6: Boeren, Jurriaan - Mostertman, Milan | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations | |
| Oct 29, 2024 | De Wit | 1–0 | Mostertman | Round 4: De Wit, Michel - Mostertman, Milan | Semi-Slav Defense | |
| Oct 28, 2024 | Mostertman | ½–½ | Kukushkin | Round 3: Mostertman, Milan - Kukushkin, Ivan | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Oct 27, 2024 | Sankalp Gupta | 1–0 | Mostertman | Round 2: Sankalp Gupta - Mostertman, Milan | Sicilian Defense: Chekhover Variation | |
| Oct 26, 2024 | Mostertman | 1–0 | Leenes | Round 1: Mostertman, Milan - Leenes, Robert | Scandinavian Defense: Modern Variation | |
| Jul 18, 2024 | Selinga | 0–1 | Mostertman | Biel Chess Festival 2024 | Semi-Slav Defense: Main Line | |