| 16 ago 2026 | Stolwijk, Colin 2290 | Mostertman, Milan 2306 | 1-0 | C50 Apertura Italiana: Paris Defense | Oscar Romero Open Hoorns Kampioenschap 2026 | 41 | Ver |
| 16 ago 2026 | Mostertman, Milan 2306 | Lont, Addy 2262 | ½-½ | B32 Defensa Siciliana: Godiva Variation | Oscar Romero Open Hoorns Kampioenschap 2026 | 53 | Ver |
| 15 ago 2026 | Guillaumond, Matthieu 2140 | Mostertman, Milan 2306 | 0-1 | C45 Apertura Escocesa: Mieses Variation | Oscar Romero Open Hoorns Kampioenschap 2026 | 36 | Ver |
| 14 ago 2026 | Becx, Cesar 2029 | Mostertman, Milan 2306 | 0-1 | A02 Apertura Bird | Oscar Romero Open Hoorns Kampioenschap 2026 | 32 | Ver |
| 13 ago 2026 | Mostertman, Milan 2306 | Zwirs, Nico 2438 | ½-½ | B90 Defensa Siciliana: Najdorf Variation, English Attack | Oscar Romero Open Hoorns Kampioenschap 2026 | 21 | Ver |
| 28 jun 2026 | Bagrationi, Alexander 2444 | Mostertman, Milan 2300 | 1-0 | C70 Apertura Española (Ruy López): Morphy Defense, Cozio Defense | HWP Inholland Weekendtoernooi | 67 | Ver |
| 28 jun 2026 | Mostertman, Milan 2300 | Schilstra, Laurens 2182 | 1-0 | B18 Defensa Caro-Kann: Classical Variation, Main Line | HWP Inholland Weekendtoernooi | 42 | Ver |
| 27 jun 2026 | Pathak, Raghav 2084 | Mostertman, Milan 2300 | 0-1 | C02 Defensa Francesa: Advance Variation, Lputian Variation | HWP Inholland Weekendtoernooi | 44 | Ver |
| 21 jun 2026 | Mostertman, Milan 2300 | Hallibert, Emilien 2076 | 1-0 | B91 Defensa Siciliana: Najdorf Variation, Zagreb Variation | HSG Open 2026 A | 31 | Ver |
| 21 jun 2026 | Van Helvoort, Rob 2076 | Mostertman, Milan 2300 | 1-0 | B01 Defensa Escandinava: Gubinsky-Melts Defense | HSG Open 2026 A | 29 | Ver |
| 20 jun 2026 | De Winter, Arthur 2455 | Mostertman, Milan 2300 | 1-0 | D33 Defensa Tarrasch: Dubov Tarrasch | HSG Open 2026 A | 22 | Ver |
| 19 jun 2026 | Mostertman, Milan 2300 | Zhang, Xiheng 2135 | 1-0 | B40 Defensa Siciliana: French Variation | HSG Open 2026 A | 35 | Ver |
| 25 may 2026 | Mostertman, Milan 2258 | Noordenbos, Daan 2186 | 0-1 | C55 Apertura Italiana: Two Knights Defense, Modern Bishop's Opening | 18th BPB Limburg Open | Open | 51 | Ver |
| 24 may 2026 | Lenaerts, Lennert 2357 | Mostertman, Milan 2258 | 1-0 | E20 Defensa Nimzoindia: Romanishin Variation | 18th BPB Limburg Open | Open | 107 | Ver |
| 24 may 2026 | Mostertman, Milan 2258 | Perkampus, Laurin 2170 | 1-0 | B45 Defensa Siciliana: Four Knights Variation | 18th BPB Limburg Open | Open | 60 | Ver |
| 23 may 2026 | Guliyev, Namig 2468 | Mostertman, Milan 2258 | 1-0 | C11 Defensa Francesa: Steinitz Variation, Boleslavsky Variation | 18th BPB Limburg Open | Open | 48 | Ver |
| 23 may 2026 | Mostertman, Milan 2258 | Villwock, Martin 2062 | 1-0 | B42 Defensa Siciliana: Kan Variation, Polugaevsky Variation | 18th BPB Limburg Open | Open | 31 | Ver |
| 17 may 2026 | Botter, Simon 2045 | Mostertman, Milan 2258 | 0-1 | A05 Ataque Indio de Rey: Spassky Variation | Weekendtoernooi GC & PK NOSBO 2026 | 31 | Ver |
| 15 may 2026 | Koukas, Anastasios 2060 | Mostertman, Milan 2258 | 0-1 | C01 Defensa Francesa: Exchange Variation | Weekendtoernooi GC & PK NOSBO 2026 | 48 | Ver |
| 14 may 2026 | Mostertman, Milan 2258 | Leenes, Robert 2002 | 1-0 | B45 Defensa Siciliana: Four Knights Variation | Weekendtoernooi GC & PK NOSBO 2026 | 25 | Ver |