| 23 ago 2026 | Ernst, Sipke 2542 | Brzezina, Piotr 2398 | 1-0 | E56 Defensa Nimzoindia: Normal Variation, Gligoric System, Bernstein Defense | Olomoucke sachove leto 2026 - ab | 37 | Ver |
| 22 ago 2026 | Simacek, Pavel 2372 | Ernst, Sipke 2542 | ½-½ | C45 Apertura Escocesa: Schmidt Variation | Olomoucke sachove leto 2026 - ab | 9 | Ver |
| 21 ago 2026 | Ernst, Sipke 2542 | Efroimski, Marsel 2360 | 1-0 | D35 Gambito de Dama rehusado: Exchange Variation | Olomoucke sachove leto 2026 - ab | 24 | Ver |
| 19 ago 2026 | Delgerdalai, Bayarjavkhlan 2392 | Ernst, Sipke 2542 | 0-1 | D02 Apertura de Peón de Dama: London System | Olomoucke sachove leto 2026 - ab | 31 | Ver |
| 18 ago 2026 | Ernst, Sipke 2542 | Mirzoev, Azer 2401 | ½-½ | D31 Gambito de Dama rehusado: Charousek Variation | Olomoucke sachove leto 2026 - ab | 31 | Ver |
| 17 ago 2026 | Van der Lende, Ilias 2393 | Ernst, Sipke 2542 | 0-1 | A06 Apertura Zukertort | Olomoucke sachove leto 2026 - ab | 37 | Ver |
| 17 ago 2026 | Ernst, Sipke 2542 | Rakshitta Ravi 2352 | 1-0 | D33 Defensa Tarrasch: Dubov Tarrasch | Olomoucke sachove leto 2026 - ab | 48 | Ver |
| 16 ago 2026 | Admiraal, Miguoel 2470 | Ernst, Sipke 2542 | ½-½ | D00 Apertura de Peón de Dama: Accelerated London System, Steinitz Countergambit Accepted | Olomoucke sachove leto 2026 - ab | 94 | Ver |
| 15 ago 2026 | Szwed, Jacek 2301 | Ernst, Sipke 2542 | 0-1 | C45 Apertura Escocesa: Schmidt Variation | Olomoucke sachove leto 2026 - ab | 79 | Ver |
| 7 jul 2026 | Ernst, Sipke 2540 | Vrolijk, Liam 2519 | 0-1 | A09 Apertura Réti: Réti Accepted | Round 2.Tiebreaks: Ernst, Sipke - Vrolijk, Liam | 24 | Ver |
| 7 jul 2026 | Vrolijk, Liam 2519 | Ernst, Sipke 2540 | 1-0 | E90 Defensa India de Rey: Normal Variation, Rare Defenses | Round 2.Tiebreaks: Vrolijk, Liam - Ernst, Sipke | 39 | Ver |
| 7 jul 2026 | Vrolijk, Liam 2519 | Ernst, Sipke 2540 | ½-½ | E60 Defensa India de Rey: Semi-Classical Variation, Benoni Variation | Round 2.Tiebreaks: Vrolijk, Liam - Ernst, Sipke | 41 | Ver |
| 7 jul 2026 | Ernst, Sipke 2540 | Vrolijk, Liam 2519 | ½-½ | A13 Apertura Inglesa: Agincourt Defense | Round 2.Tiebreaks: Ernst, Sipke - Vrolijk, Liam | 42 | Ver |
| 6 jul 2026 | Vrolijk, Liam 2519 | Ernst, Sipke 2540 | ½-½ | C49 Apertura de los Cuatro Caballos: Spanish Variation, Nimzowitsch Variation | Dutch Championship 2026 Open | 34 | Ver |
| 6 jul 2026 | Ernst, Sipke 2540 | Vrolijk, Liam 2519 | ½-½ | D32 Defensa Tarrasch | Dutch Championship 2026 Open | 33 | Ver |
| 9 jun 2026 | Ernst, Sipke 2540 | De Winter, Arthur 2446 | 1-0 | A14 Apertura Inglesa: Agincourt Defense, Neo-Catalan Declined | Dutch Championship 2026 Open | 48 | Ver |
| 9 jun 2026 | De Winter, Arthur 2446 | Ernst, Sipke 2540 | ½-½ | D35 Gambito de Dama rehusado: Exchange Variation, Positional Variation | Dutch Championship 2026 Open | 47 | Ver |
| 28 mar 2026 | Bosman, Michiel 2297 | Ernst, Sipke 2524 | 0-1 | D12 Defensa Eslava: Quiet Variation, Schallopp Defense | Dutch Meesterklasse 2025/26 | 90 | Ver |
| 7 mar 2026 | Ernst, Sipke 2524 | Lombaers, Peter 2309 | ½-½ | A05 Ataque Indio de Rey: Symmetrical Defense | Dutch Meesterklasse 2025/26 | 39 | Ver |
| 7 feb 2026 | Zwirs, Nico 2424 | Ernst, Sipke 2525 | ½-½ | C49 Apertura de los Cuatro Caballos: Spanish Variation, Nimzowitsch Variation | Dutch Meesterklasse 2025/26 | 15 | Ver |