| 19 jul 2026 | Labruyere, Roger 2202 | Elgersma, Onno 2356 | ½-½ | C55 Apertura Italiana: Two Knights Defense, Modern Bishop's Opening | Amsterdam Chess Festival 2026 - Groep A | 51 | Ver |
| 18 jul 2026 | Elgersma, Onno 2356 | Schoorl, Rob 2284 | 0-1 | B70 Defensa Siciliana: Dragon Variation, Fianchetto Variation | Amsterdam Chess Festival 2026 - Groep A | 44 | Ver |
| 16 jul 2026 | Ten Kate, Gustav 2019 | Elgersma, Onno 2356 | 0-1 | C79 Apertura Española (Ruy López): Morphy Defense, Steinitz Deferred | Amsterdam Chess Festival 2026 - Groep A | 34 | Ver |
| 15 jul 2026 | Elgersma, Onno 2356 | Schilstra, Laurens 2194 | 0-1 | B11 Defensa Caro-Kann: Two Knights Attack, Mindeno Variation, Retreat Line | Amsterdam Chess Festival 2026 - Groep A | 79 | Ver |
| 14 jul 2026 | Van der Plas, Rob 2119 | Elgersma, Onno 2356 | 0-1 | D37 Gambito de Dama rehusado: Three Knights Variation | Amsterdam Chess Festival 2026 - Groep A | 33 | Ver |
| 13 jul 2026 | Elgersma, Onno 2356 | Khatniuk, Anastasiia 2022 | 1-0 | A07 King's Indian Attack, with e6 | Amsterdam Chess Festival 2026 - Groep A | 56 | Ver |
| 12 jul 2026 | Wunnink, Michael 2187 | Elgersma, Onno 2356 | 1-0 | A15 Apertura Inglesa: Anglo-Indian Defense, King's Knight Variation | Amsterdam Chess Festival 2026 - Groep A | 36 | Ver |
| 11 jul 2026 | Elgersma, Onno 2356 | Brienen, Jacob 2090 | 1-0 | B45 Defensa Siciliana: Four Knights Variation | Amsterdam Chess Festival 2026 - Groep A | 36 | Ver |
| 11 abr 2026 | Braun, Christian 2396 | Elgersma, Onno 2355 | ½-½ | C55 Apertura Italiana: Two Knights Defense, Modern Bishop's Opening | Dutch Meesterklasse 2025/26 | 71 | Ver |
| 7 mar 2026 | Elgersma, Onno 2360 | Korneev, Oleg 2443 | ½-½ | A07 Ataque Indio de Rey: Keres Variation | Dutch Meesterklasse 2025/26 | 49 | Ver |
| 7 feb 2026 | Victor, Julian 2214 | Elgersma, Onno 2356 | 0-1 | D35 Gambito de Dama rehusado: Exchange Variation, Positional Variation | Dutch Meesterklasse 2025/26 | 40 | Ver |
| 31 ene 2026 | Elgersma, Onno 2369 | Gloeckler, Christian 2444 | 0-1 | E08 Apertura Catalana: Closed | Tata Steel Chess Qualifiers | 45 | Ver |
| 30 ene 2026 | Beukema, Stefan 2394 | Elgersma, Onno 2369 | 0-1 | A03 Apertura Bird: Dutch Variation | Tata Steel Chess Qualifiers | 42 | Ver |
| 27 ene 2026 | Elgersma, Onno 2369 | Van Foreest, Machteld 2330 | 1-0 | E61 Defensa India de Rey: Semi-Classical Variation | Tata Steel Chess Qualifiers | 43 | Ver |
| 27 ene 2026 | Tudor, Henry Edward 2434 | Elgersma, Onno 2369 | 1-0 | D37 Gambito de Dama rehusado: Three Knights Variation | Tata Steel Chess Qualifiers | 35 | Ver |
| 26 ene 2026 | Elgersma, Onno 2369 | Hrbek, Stepan 2454 | 0-1 | D37 Gambito de Dama rehusado: Three Knights Variation | Tata Steel Chess Qualifiers | 65 | Ver |
| 25 ene 2026 | Baselmans, Luuk 2406 | Elgersma, Onno 2369 | ½-½ | C89 Apertura Española (Ruy López): Marshall Attack | Tata Steel Chess Qualifiers | 71 | Ver |
| 24 ene 2026 | Elgersma, Onno 2369 | Lohia, Sohum 2410 | 1-0 | E08 Apertura Catalana: Closed | Tata Steel Chess Qualifiers | 66 | Ver |
| 15 ene 2026 | Carow, Johannes, Dr. 2470 | Elgersma, Onno 2356 | 1-0 | D35 Gambito de Dama rehusado: Exchange Variation, Positional Variation | Tata Steel Chess Qualifiers | 44 | Ver |
| 29 dic 2025 | Krishnan, Ritvik 2265 | Elgersma, Onno 2366 | 1-0 | D37 Gambito de Dama rehusado: Barmen Variation | Chessfestival Groningen 2025 | Open A | 40 | Ver |