NED-ch m playoff
The Hague 1965
| Date | Players | Type | Elo Average | Games | Rounds |
| 1965 | 2 | Match | 4 | 4 |
| Name | ELO | Points | ||
| Prins, Lodewijk | 2.5 | |||
| Zuidema, Coenraad | 1.5 | |||
NED-ch m playoff Games
| White | Black | Result | Round | Date | Opening | View |
| Prins, L | Zuidema, C | ½-½  |
1 | 1965 | E25 Nimzo-Indian, Saemisch variation |   |
| Zuidema, C | Prins, L | ½-½ |
2 | 1965 | B17 Caro-Kann, Steinitz variation |   |
| Prins, L | Zuidema, C | 1-0 |
3 | 1965 | C35 King's Gambit Accepted, Cunningham defence | |
| Zuidema, C | Prins, L | ½-½ |
4 | 1965 | C10 French, Paulsen variation | |
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