| 24 jul 2026 | Han, Qixuan 2058 | Zecha, Oscar 2181 | 0-1 | C45 Apertura Escocesa: Potter Variation | Dutch Open 2026 - Dutch Open | 42 | Ver |
| 23 jul 2026 | Zecha, Oscar 2181 | Ritzerveld, Noah 2336 | 0-1 | C78 Apertura Española (Ruy López): Morphy Defense, Arkhangelsk Variation | Dutch Open 2026 - Dutch Open | 29 | Ver |
| 22 jul 2026 | Zecha, Oscar 2181 | Van t Hoff, Tom 2056 | 1-0 | E04 Apertura Catalana: Open Defense | Dutch Open 2026 - Dutch Open | 63 | Ver |
| 21 jul 2026 | De Winter, Arthur 2446 | Zecha, Oscar 2181 | 1-0 | C54 Apertura Italiana: Classical Variation, Giuoco Pianissimo | Dutch Open 2026 - Dutch Open | 51 | Ver |
| 19 jul 2026 | Zecha, Oscar 2181 | Van t Hoff, Tom 2056 | 1-0 | A00 Clemenz Opening | Amsterdam Chess Festival 2026 - Groep A | 35 | Ver |
| 18 jul 2026 | Kazarjan, Gachatur 2299 | Zecha, Oscar 2181 | 1-0 | C50 Apertura Italiana: Giuoco Piano | Amsterdam Chess Festival 2026 - Groep A | 31 | Ver |
| 17 jul 2026 | Zecha, Oscar 2181 | Han, Qixiang 2311 | 1-0 | B12 Defensa Caro-Kann: Advance Variation, Tal Variation | Amsterdam Chess Festival 2026 - Groep A | 50 | Ver |
| 16 jul 2026 | Van Delft, Merijn 2358 | Zecha, Oscar 2181 | 1-0 | C44 King's Knight Opening: Konstantinopolsky | Amsterdam Chess Festival 2026 - Groep A | 69 | Ver |
| 15 jul 2026 | Zecha, Oscar 2181 | Goudriaan, Rafael 2262 | 1-0 | B12 Defensa Caro-Kann: Advance Variation, Botvinnik-Carls Defense | Amsterdam Chess Festival 2026 - Groep A | 60 | Ver |
| 10 may 2026 | Kurt, Sascha 2325 | Zecha, Oscar 2176 | 1-0 | C50 Apertura Italiana: Giuoco Pianissimo, Italian Four Knights Variation | Ronde 6: Kurt, Sascha - Zecha, Oscar | 33 | Ver |
| 10 may 2026 | Zecha, Oscar 2176 | Becx, Cesar 2027 | 1-0 | C61 Apertura Española (Ruy López): Bird Variation | Ronde 5: Zecha, Oscar - Becx, Cesar | 65 | Ver |
| 1 may 2026 | Zecha, Oscar 2176 | Kurt, Sascha 2325 | 1-0 | B90 Defensa Siciliana: Najdorf Variation, English Attack | Dutch Youth Championship 2026 | U16 | 49 | Ver |
| 1 may 2026 | Aravindhan, Achyuth 2213 | Zecha, Oscar 2176 | 0-1 | C44 King's Knight Opening: Konstantinopolsky | Dutch Youth Championship 2026 | U16 | 63 | Ver |
| 1 may 2026 | Zecha, Oscar 2176 | Baarspul, Bram 2173 | ½-½ | B90 Defensa Siciliana: Najdorf Variation, English Attack | Dutch Youth Championship 2026 | U16 | 50 | Ver |
| 1 may 2026 | Groenewoud, Joel 2084 | Zecha, Oscar 2176 | 0-1 | C79 Apertura Española (Ruy López): Morphy Defense, Steinitz Deferred | Dutch Youth Championship 2026 | U16 | 34 | Ver |
| 30 abr 2026 | Teianu, Maxim 2042 | Zecha, Oscar 2176 | 0-1 | D38 Gambito de Dama rehusado: Ragozin Defense | Dutch Youth Championship 2026 | U16 | 68 | Ver |
| 29 abr 2026 | Zecha, Oscar 2120 | Frederiks, Jesse 2018 | ½-½ | C88 Apertura Española (Ruy López): Closed, Anti-Marshall | Dutch Youth Championship 2026 | U16 | 54 | Ver |
| 29 abr 2026 | Aravindhan, Achyuth 2277 | Zecha, Oscar 2120 | ½-½ | C50 Apertura Italiana: Giuoco Pianissimo, Normal | Dutch Youth Championship 2026 | U16 | 43 | Ver |
| 27 abr 2026 | Winter, Sven 2013 | Zecha, Oscar 2120 | 0-1 | C54 Apertura Italiana: Classical Variation, Giuoco Pianissimo, with h6 | Dutch Youth Championship 2026 | U16 | 31 | Ver |
| 11 abr 2026 | Zecha, Oscar 2120 | Mollema, Thomas 2254 | 1-0 | C42 Defensa Petrov: Nimzowitsch Attack | Dutch Meesterklasse 2025/26 | 37 | Ver |