| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. W Holthuis vs R Lahaye |
| 0-1 | 35 | 1987 | NED-ch H corr | B21 Sicilian, 2.f4 and 2.d4 |
| 2. Stellwagen vs R Lahaye |
| 0-1 | 48 | 1997 | Hengelo op U14 | B84 Sicilian, Scheveningen |
| 3. R Lahaye vs A Lickrastina |
| ½-½ | 22 | 1998 | Dutch Open | C56 Two Knights |
| 4. R Lahaye vs H Jonkman |
| 0-1 | 70 | 1998 | Dutch Open | C56 Two Knights |
| 5. M de Heer vs R Lahaye |
| 0-1 | 91 | 1998 | Dutch Open | B23 Sicilian, Closed |
| 6. P de Pender vs R Lahaye |
| 0-1 | 26 | 1998 | Dutch Open | B92 Sicilian, Najdorf, Opocensky Variation |
| 7. R Lahaye vs R van Helvoort |
| 0-1 | 61 | 1998 | Dutch Open | B20 Sicilian |
| 8. B Pel vs R Lahaye |
| 0-1 | 39 | 1998 | Dutch Open | A00 Uncommon Opening |
| 9. A Lehtinen vs R Lahaye |
| 1-0 | 29 | 1998 | Dutch Open | B83 Sicilian |
| 10. R Bertholee vs R Lahaye |
| 1-0 | 38 | 1998 | Dutch Open | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 11. R Lahaye vs G de Niet |
| 1-0 | 38 | 1998 | Dutch Open | B20 Sicilian |
| 12. Y Afek vs R Lahaye |
| 1-0 | 64 | 1999 | Dutch Open | B90 Sicilian, Najdorf |
| 13. R Lahaye vs L'Ami |
| ½-½ | 39 | 1999 | Dutch Open | B13 Caro-Kann, Exchange |
| 14. J Wolbers vs R Lahaye |
| 0-1 | 41 | 1999 | Dutch Open | A07 King's Indian Attack |
| 15. R Lahaye vs M de Jong |
| ½-½ | 39 | 1999 | Dutch Open | B20 Sicilian |
| 16. R Hartoch vs R Lahaye |
| ½-½ | 29 | 1999 | Dutch Open | A06 Reti Opening |
| 17. R Lahaye vs M de Heer |
| 1-0 | 34 | 1999 | Dutch Open | C41 Philidor Defense |
| 18. N Vink vs R Lahaye |
| 0-1 | 36 | 1999 | Dutch Open | B90 Sicilian, Najdorf |
| 19. R Lahaye vs A Berelowitsch |
| 0-1 | 42 | 1999 | Dutch Open | E73 King's Indian |
| 20. J Delemarre vs R Lahaye |
| ½-½ | 38 | 1999 | Dutch Open | D43 Queen's Gambit Declined Semi-Slav |
| 21. R Lahaye vs N Gaprindashvili |
| 0-1 | 49 | 1999 | Groningen Open | B00 Uncommon King's Pawn Opening |
| 22. Y H de Rover vs R Lahaye |
| 1-0 | 44 | 2000 | S0-0N Mini A | D30 Queen's Gambit Declined |
| 23. Barsov vs R Lahaye |
| 1-0 | 29 | 2000 | Dutch Open | D31 Queen's Gambit Declined |
| 24. R Lahaye vs J Burggraaf |
| 1-0 | 14 | 2000 | Dutch Open | C53 Giuoco Piano |
| 25. L van Beek vs R Lahaye |
| 1-0 | 40 | 2000 | Dutch Open | D31 Queen's Gambit Declined |
Kibitzing
