| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. F van der Vliet vs P Boersma |
| ½-½ | 68 | 1973 | Dutch Championship | A53 Old Indian |
| 27. E Scholl vs P Boersma |
| ½-½ | 36 | 1973 | Dutch Championship | B09 Pirc, Austrian Attack |
| 28. P Boersma vs J Marcus |
| ½-½ | 20 | 1973 | Dutch Championship | A00 Uncommon Opening |
| 29. T van Scheltinga vs P Boersma |
| ½-½ | 28 | 1973 | Dutch Championship | A41 Queen's Pawn Game (with ...d6) |
| 30. P Boersma vs R Hartoch |
| ½-½ | 57 | 1973 | Dutch Championship | A07 King's Indian Attack |
| 31. Sosonko vs P Boersma |
| 1-0 | 41 | 1973 | Dutch Championship | A53 Old Indian |
| 32. P Boersma vs C Zuidema |
| 0-1 | 42 | 1973 | Dutch Championship | A13 English |
| 33. P Boersma vs S Buchal |
| 1-0 | 56 | 1974 | World Student Team Championship qual-3 | B08 Pirc, Classical |
| 34. P Boersma vs S Aral |
| 1-0 | 38 | 1974 | World Student Team Championship qual-3 | B13 Caro-Kann, Exchange |
| 35. P Boersma vs R Thomann |
| 1-0 | 60 | 1974 | World Student Team Championship qual-3 | C05 French, Tarrasch |
| 36. P Boersma vs D Bernstein |
| 1-0 | 49 | 1974 | World Student Team Championship qual-3 | B46 Sicilian, Taimanov Variation |
| 37. U Nehmert vs P Boersma |
| 1-0 | 47 | 1974 | World Student Team Championship Final-A | A77 Benoni, Classical, 9...Re8, 10.Nd2 |
| 38. H Rolletschek vs P Boersma |
| 0-1 | 29 | 1974 | World Student Team Championship Final-A | B21 Sicilian, 2.f4 and 2.d4 |
| 39. P Boersma vs J Ost-Hansen |
| 0-1 | 39 | 1974 | World Student Team Championship Final-A | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 40. M Babula vs P Boersma |
| 0-1 | 40 | 1974 | World Student Team Championship Final-A | B88 Sicilian, Fischer-Sozin Attack |
| 41. P Boersma vs Nunn |
| ½-½ | 57 | 1974 | World Student Team Championship Final-A | B06 Robatsch |
| 42. R Stoutenborough vs P Boersma |
| ½-½ | 73 | 1974 | World Student Team Championship Final-A | A10 English |
| 43. A Beliavsky vs P Boersma |
| ½-½ | 40 | 1974 | World Student Team Championship Final-A | A31 English, Symmetrical, Benoni Formation |
| 44. K Kaiszauri vs P Boersma |
| ½-½ | 31 | 1975 | NED-SWE Telex Match | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 45. R Nilles vs P Boersma |
| ½-½ | 16 | 1975 | 1st EEC Team Championship | E77 King's Indian |
| 46. P Boersma vs P Mack |
  | 0-1 | 43 | 1975 | 1st EEC Team Championship | B33 Sicilian |
| 47. B Jacobsen vs P Boersma |
| 0-1 | 31 | 1975 | 1st EEC Team Championship | A10 English |
| 48. P Boersma vs M Kennefick |
| ½-½ | 40 | 1975 | 1st EEC Team Championship | B03 Alekhine's Defense |
| 49. J Goormachtigh vs P Boersma |
| ½-½ | 51 | 1975 | 1st EEC Team Championship | A75 Benoni, Classical with ...a6 and 10...Bg4 |
| 50. R Hartoch vs P Boersma |
| 1-0 | 47 | 1976 | Hoogovens-B | A00 Uncommon Opening |
Kibitzing
