DutchBase 1976-1980
| Year | Event | Games | Winner | Info |
| 1976 | Amsterdam Euwe | 12 | Karpov | |
| 1976 | Amsterdam IBM I | 120 | Kortchnoi, Miles | |
| 1976 | Amsterdam IBM II | 66 | Tatai, Prybil | |
| 1976 | Leeuwarden ch-NED | 66 | Timman | |
| 1976 | Leeuwarden m | 8 | Kortchnoi | |
| 1976 | Roosendaal izt w | 91 | Akhmilovskaya, Kushnir | |
| 1976 | Sas van Gent jr m | 6 | Van der Wiel | |
| 1976 | Velp ch-NED open | 57 / ? | Nemet | |
| 1976 | Wijk aan Zee I | 66 | Olafsson,F | info |
| 1976 | Wijk aan Zee II | 66 | Nikolac | info |
| 1977 | Amsterdam IBM I | 120 | Miles | info |
| 1977 | Amsterdam IBM II | 66 | Nikolac | info |
| 1977 | Amsterdam IBM III | 6 | Van Scheltinga, Hartoch | info |
| 1977 | Amsterdam m | 6 | Spassky | |
| 1977 | Groningen ch-EU jr | 208 | Dolmatov | |
| 1977 | Leeuwarden ch-NED | 91 | Kortchnoi | info |
| 1977 | Nijmegen rapid | 28 | Enklaar | |
| 1977 | Rotterdam ch-NED jr | 90 | Janssen,H | |
| 1977 | Rotterdam m | 10 | Portisch - Larsen | info |
| 1977 | Tilburg | 66 | Karpov | info |
| 1977 | Velp ch-NED open | 94 / ? | Nemet | |
| 1977 | Wijk aan Zee I | 66 | Geller, Sosonko | info |
| 1977 | Wijk aan Zee II | 66 | Kupreichik | info |
| 1978 | Amsterdam IBM I | 91 | Timman | info |
| 1978 | Amsterdam IBM II | 91 | Jussupow | |
| 1978 | Amsterdam tt ch-EU prel | 48 | | |
| 1978 | Amsterdam zt | 105 | Timman, Miles | |
| 1978 | Eerbeek | 66 | Nikolac | |
| 1978 | Groningen ch-EU jr | 182 | Van der Wiel | |
| 1978 | Leeuwarden ch-NED | 91 | Timman, Sosonko | info |
| 1978 | Nijmegen rapid | 28 | Sosonko, Timman | |
| 1978 | Tilburg | 66 | Portisch | info |
| 1978 | Velp ch-NED open | 74 / ? | Nemet | |
| 1978 | Wijk aan Zee I | 66 | Portisch | info |
| 1978 | Wijk aan Zee II | 6 | Bouwmeester | info |
| 1979 | Amsterdam IBM I | 91 | Hort, Sax | |
| 1979 | Amsterdam IBM II | 91 | Dolmatov | |
| 1979 | Breda m | 8 | Timman | info |
| 1979 | Groningen ch-EU jr | 208 | Chernin | |
| 1979 | Leeuwarden ch-NED | 91 | Ligterink | info |
| 1979 | Tilburg | 66 | Karpov | |
| 1979 | Waddinxveen | 12 | Karpov | |
| 1979 | Wijk aan Zee I | 66 | Polugaevsky | info |
| 1979 | Wijk aan Zee II | 6 | Van Wijgerden | info |
| 1980 | Amsterdam IBM Crown | 56 | Karpov | info |
| 1980 | Amsterdam IBM I | 66 | Ree, Unzicker | info |
| 1980 | Amsterdam IBM II | 66 | Chernin | info |
| 1980 | Groningen ch-EU jr | 195 | Akesson | |
| 1980 | Groningen/Amsterdam | 6 | | |
| 1980 | Leeuwarden ch-NED | 91 | Timman | info |
| 1980 | Nijmegen rapid | 28 | Hort, Sosonko | |
| 1980 | Tilburg | 66 | Karpov | info |
| 1980 | Wijk aan Zee I | 91 | Brown, Seirawan | info |
| 1980 | Wijk aan Zee II | 6 | Van Wijgerden | info |