| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. P Boersma vs J Nikolac |
| 0-1 | 30 | 1976 | Hoogovens-B | C03 French, Tarrasch |
| 52. I Farago vs P Boersma |
| 1-0 | 40 | 1976 | Hoogovens-B | E45 Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation |
| 53. P Boersma vs R Bellin |
| 0-1 | 27 | 1976 | Hoogovens-B | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 54. J Marcus vs P Boersma |
| 0-1 | 40 | 1976 | Hoogovens-B | A45 Queen's Pawn Game |
| 55. G Ligterink vs P Boersma |
| 1-0 | 41 | 1976 | Hoogovens-B | B01 Scandinavian |
| 56. P Boersma vs H Lehmann |
| 0-1 | 58 | 1976 | Hoogovens-B | B42 Sicilian, Kan |
| 57. L Christiansen vs P Boersma |
| 1-0 | 48 | 1976 | Hoogovens-B | A04 Reti Opening |
| 58. P Boersma vs J Szmetan |
| 0-1 | 42 | 1976 | Hoogovens-B | A20 English |
| 59. Westerinen vs P Boersma |
| 0-1 | 40 | 1976 | Hoogovens-B | B83 Sicilian |
| 60. P Boersma vs A Kushnir |
| 1-0 | 39 | 1976 | Hoogovens-B | C62 Ruy Lopez, Old Steinitz Defense |
| 61. P Boersma vs Timman |
| 0-1 | 19 | 1977 | NED-chT | D86 Grunfeld, Exchange |
| 62. P Boersma vs H Bohm |
| 1-0 | 80 | 1977 | Dutch Championship | A09 Reti Opening |
| 63. J van Baarle vs P Boersma |
| ½-½ | 17 | 1977 | Dutch Championship | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 64. P Boersma vs Timman |
| 0-1 | 42 | 1977 | Dutch Championship | A77 Benoni, Classical, 9...Re8, 10.Nd2 |
| 65. R Hartoch vs P Boersma |
| ½-½ | 30 | 1977 | Dutch Championship | B59 Sicilian, Boleslavsky Variation, 7.Nb3 |
| 66. P Boersma vs Korchnoi |
 | 0-1 | 60 | 1977 | Dutch Championship | C00 French Defense |
| 67. L Hofland vs P Boersma |
| ½-½ | 16 | 1977 | Dutch Championship | A10 English |
| 68. P Boersma vs G Ligterink |
| ½-½ | 37 | 1977 | Dutch Championship | B25 Sicilian, Closed |
| 69. J H Donner vs P Boersma |
| ½-½ | 43 | 1977 | Dutch Championship | E44 Nimzo-Indian, Fischer Variation, 5.Ne2 |
| 70. P Boersma vs K Langeweg |
| ½-½ | 61 | 1977 | Dutch Championship | B40 Sicilian |
| 71. Van der Sterren vs P Boersma |
| 1-0 | 33 | 1977 | Dutch Championship | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 72. P Boersma vs F van der Vliet |
| ½-½ | 28 | 1977 | Dutch Championship | B93 Sicilian, Najdorf, 6.f4 |
| 73. P Boersma vs C van Wijgerden |
| ½-½ | 26 | 1977 | Dutch Championship | B08 Pirc, Classical |
| 74. H Ree vs P Boersma |
| 1-0 | 24 | 1977 | Dutch Championship | E81 King's Indian, Samisch |
| 75. P Boersma vs H Ariaans |
| 1-0 | 22 | 1977 | Dutch Open | A00 Uncommon Opening |
Kibitzing
