| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. L Bass vs H Grooten |
| 1-0 | 48 | 1981 | World Youth U26 Team Championship | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 2. G Pieterse vs H Grooten |
| 1-0 | 61 | 1986 | NED-ch sf A | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 3. A Lont vs H Grooten |
| 0-1 | 36 | 1996 | NED-chT 1996/97 | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 4. J van den Bersselaar vs H Grooten |
| 1-0 | 57 | 2006 | Gibraltar Masters | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 5. F Peralta vs H Grooten |
| 1-0 | 27 | 2007 | Hogeschool Zeeland Tournament | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 6. H Galje vs H Grooten |
 | 0-1 | 21 | 2007 | 11th Essent Open | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 7. R Koster vs H Grooten |
| 1-0 | 39 | 2024 | Groningen Open | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
Kibitzing
