| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. H Grooten vs E Knoppert |
| 1-0 | 30 | 1984 | Regency Masters | E60 King's Indian Defense |
| 2. H Grooten vs R Hartoch |
| 0-1 | 37 | 1985 | Hoogovens Group B | E60 King's Indian Defense |
| 3. H Grooten vs L Riemersma |
| 0-1 | 39 | 1986 | NED-ch sf A | E60 King's Indian Defense |
Kibitzing
