| 25 may 2026 | Decoster, Frederic 2231 | Kazarjan, Gachatur 2272 | 0-1 | B75 Defensa Siciliana: Dragon Variation, Yugoslav Attack, Hungarian Dragon | 18th BPB Limburg Open | Open | 29 | Ver |
| 25 may 2026 | Guliyev, Namig 2468 | Decoster, Frederic 2231 | 1-0 | B45 Defensa Siciliana: Four Knights Variation | 18th BPB Limburg Open | Open | 62 | Ver |
| 24 may 2026 | Decoster, Frederic 2231 | Dann, Matthias 2425 | ½-½ | B90 Defensa Siciliana: Najdorf Variation | 18th BPB Limburg Open | Open | 58 | Ver |
| 24 may 2026 | De Winter, Arthur 2455 | Decoster, Frederic 2231 | 0-1 | D35 Gambito de Dama rehusado: Exchange Variation, Positional Variation | 18th BPB Limburg Open | Open | 36 | Ver |
| 9 may 2026 | Fedorchuk, Sergey A. 2592 | Decoster, Frederic 2272 | 1-0 | B41 Defensa Siciliana: Kan Variation | Luc Winants Memorial Rapid Chess Tournament 2026 | 33 | Ver |
| 25 oct 2025 | Decoster, Frederic 2288 | Ziegler, Ari 2297 | 0-1 | B33 Defensa Siciliana: Lasker-Pelikan Variation | European Chess Club Cup 2025 | Open Matches 17+ | 41 | Ver |
| 22 oct 2025 | Bochnicka, Vladimir 2347 | Decoster, Frederic 2288 | 1-0 | B42 Defensa Siciliana: Kan Variation, Polugaevsky Variation | European Chess Club Cup 2025 | Open Matches 1-16 | 25 | Ver |
| 20 oct 2025 | Decoster, Frederic 2288 | Sirin, Atakan 2346 | ½-½ | B78 Defensa Siciliana: Dragon Variation, Yugoslav Attack, Chinese Dragon | European Chess Club Cup 2025 | Open Matches 17+ | 46 | Ver |