| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. G Timmerman vs G J De Boer |
| 1-0 | 37 |
1982 |
NED-ch sf-B | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 2. G Timmerman vs G J De Boer |
| 1-0 | 68 |
1982 |
NED-ch sf-B playoff | B49 Sicilian, Taimanov Variation |
| 3. G J De Boer vs Timman |
| 1-0 | 36 |
1983 |
Holland | A61 Benoni |
| 4. H P Garcia vs G J De Boer |
| 1-0 | 40 |
1983 |
Amstelveen open | B40 Sicilian |
| 5. G J De Boer vs Szabo |
| 0-1 | 41 |
1984 |
Amsterdam OHRA II | E12 Queen's Indian |
| 6. G J De Boer vs Smejkal |
| 0-1 | 44 |
1984 |
Berlin op | D87 Grunfeld, Exchange |
| 7. Piket vs G J De Boer |
| ½-½ | 19 |
1985 |
Wijk aan Zee | D55 Queen's Gambit Declined |
| 8. G J De Boer vs Korchnoi |
| 1-0 | 43 |
1985 |
NED | D85 Grunfeld |
| 9. Ivkov vs G J De Boer |
| 1-0 | 38 |
1985 |
Lugano op | A15 English |
| 10. Smejkal vs G J De Boer |
| 1-0 | 59 |
1986 |
OHRA-B | A07 King's Indian Attack |
| 11. G J De Boer vs Piket |
| 0-1 | 41 |
1986 |
Amsterdam OHRA II | E63 King's Indian, Fianchetto, Panno Variation |
| 12. Bagirov vs G J De Boer |
| 1-0 | 51 |
1986 |
POR | D35 Queen's Gambit Declined |
| 13. Kudrin vs G J De Boer |
| 1-0 | 27 |
1986 |
It (open) | B80 Sicilian, Scheveningen |
| 14. N Davies vs G J De Boer |
| 1-0 | 47 |
1986 |
Lisbon (Portugal) | A05 Reti Opening |
| 15. F Braga vs G J De Boer |
| 1-0 | 34 |
1986 |
9, OHRA-B Amsterdam [Hiarcs 7.32 (10s) | B83 Sicilian |
| 16. G J De Boer vs Geller |
| 0-1 | 40 |
1987 |
Amsterdam OHRA II | E06 Catalan, Closed, 5.Nf3 |
| 17. J Brenninkmeijer vs G J De Boer |
| 1-0 | 35 |
1987 |
NED-ch sf B | D85 Grunfeld |
| 18. Winants vs G J De Boer |
| 0-1 | 42 |
1987 |
OHRA-B | D97 Grunfeld, Russian |
| 19. Miles vs G J De Boer |
| 1-0 | 37 |
1988 |
Dieren op | E92 King's Indian |
| 20. G J De Boer vs H P Garcia |
| 0-1 | 67 |
1989 |
Wijk aan Zee III | A04 Reti Opening |
| 21. G J De Boer vs Miles |
| ½-½ | 60 |
1989 |
Groningen | A40 Queen's Pawn Game |
| 22. Van Wely vs G J De Boer |
| 1-0 | 38 |
1989 |
Dieren | B10 Caro-Kann |
| 23. G J De Boer vs Bagirov |
| ½-½ | 12 |
1990 |
03, Dieren op | A07 King's Indian Attack |
| 24. G J De Boer vs Plachetka |
| ½-½ | 42 |
1990 |
Cannes op | E91 King's Indian |
| 25. Van der Wiel vs G J De Boer |
| ½-½ | 26 |
1990 |
Hilversum | B92 Sicilian, Najdorf, Opocensky Variation |