| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. E Wiersma vs J R Markus |
| 1-0 | 31 | 1999 | Dutch Open | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 2. E Wiersma vs B van der Marel |
| 1-0 | 17 | 1999 | Groningen Open | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 3. E Wiersma vs I Sokolov |
| ½-½ | 55 | 2000 | Amsterdam Lost Boys Open | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 4. E Wiersma vs J R Markus |
| 0-1 | 46 | 2001 | Corus Reserve Group | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 5. E Wiersma vs R Schoorl |
| ½-½ | 20 | 2023 | Dutch League 2023/24 | C69 Ruy Lopez, Exchange, Gligoric Variation |
Kibitzing
