| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. R Odendahl vs R Lahaye |
| 1-0 | 41 |
2000 |
open | A04 Reti Opening |
| 2. R Lahaye vs R Hendriks |
| 1-0 | 52 |
2000 |
open | C56 Two Knights |
| 3. R Lahaye vs S Drent |
| 1-0 | 28 |
2000 |
open | A14 English |
| 4. L Van Beek vs R Lahaye |
| 1-0 | 40 |
2000 |
open | D31 Queen's Gambit Declined |
| 5. G Szuveges vs R Lahaye |
| ½-½ | 20 |
2000 |
open | D30 Queen's Gambit Declined |
| 6. R Lahaye vs J Burggraaf |
| 1-0 | 14 |
2000 |
open | C53 Giuoco Piano |
| 7. M Smits vs R Lahaye |
| ½-½ | 32 |
2000 |
open | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 8. Barsov vs R Lahaye |
| 1-0 | 29 |
2000 |
open | D31 Queen's Gambit Declined |
| 9. Y H De Rover vs R Lahaye |
| 1-0 | 44 |
2000 |
SO-ON Mini A | D30 Queen's Gambit Declined |
| 10. R Lahaye vs Van der Wiel |
| 0-1 | 39 |
2000 |
open | A22 English |
| 11. R Lahaye vs J Bosch |
| 0-1 | 47 |
2001 |
Dutch Open | B30 Sicilian |
| 12. D Hamelink vs R Lahaye |
 | ½-½ | 7 |
2001 |
Dutch Open | B96 Sicilian, Najdorf |
| 13. Stellwagen vs R Lahaye |
| 1-0 | 23 |
2001 |
Dutch Open | B92 Sicilian, Najdorf, Opocensky Variation |
| 14. R Lahaye vs L Zimmermann |
 | 1-0 | 64 |
2001 |
Dutch Open | A22 English |
| 15. R Lahaye vs R Hartoch |
| ½-½ | 18 |
2001 |
Dutch Open | A42 Modern Defense, Averbakh System |
| 16. N Vink vs R Lahaye |
| 1-0 | 46 |
2001 |
Dutch Open | B90 Sicilian, Najdorf |
| 17. X Wemmers vs R Lahaye |
| 0-1 | 37 |
2001 |
Dutch Open | B90 Sicilian, Najdorf |
| 18. R Lahaye vs V Meijers |
| 0-1 | 61 |
2001 |
Dutch Open | B20 Sicilian |
| 19. R Lahaye vs H J Paalman |
| 1-0 | 43 |
2001 |
Dutch Open | C00 French Defense |
| 20. Van Den Doel vs R Lahaye |
| 1-0 | 42 |
2005 |
Belgian Teams 2004-05 | B90 Sicilian, Najdorf |
| 21. Timman vs R Lahaye |
| 1-0 | 30 |
2005 |
Dutch Rapid Open | B50 Sicilian |
| 22. J Vandendriessche vs R Lahaye |
| 0-1 | 34 |
2007 |
Belgian League | A04 Reti Opening |
| 23. Tiviakov vs R Lahaye |
 | 1-0 | 24 |
2007 |
Canadian Open | B22 Sicilian, Alapin |
| 24. R Lahaye vs A Kunte |
| ½-½ | 66 |
2007 |
Canadian Open | A15 English |
| 25. A Shomoev vs R Lahaye |
| ½-½ | 73 |
2007 |
Canadian Open | B99 Sicilian, Najdorf, 7...Be7 Main line |