| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. P van Hoorn vs R Loman |
| 0-1 | 20 | 1926 | Dutch Championship | A27 English, Three Knights System |
| 27. H Hogrefe vs P van Hoorn |
| 1-0 | 28 | 1926 | VAS-Bremer Schachgesellschaft | D69 Queen's Gambit Declined, Orthodox Defense, Classical, 13.de |
| 28. Euwe vs P van Hoorn |
 | 1-0 | 24 | 1926 | Amsterdam | C54 Giuoco Piano |
| 29. P van Hoorn vs Euwe |
| 0-1 | 36 | 1927 | Amsterdam CC Championship | D70 Neo-Grunfeld Defense |
| 30. F L Wackers vs P van Hoorn |
| 1-0 | 46 | 1927 | NED-chT VAS-DD | D52 Queen's Gambit Declined |
| 31. J Addicks vs P van Hoorn |
| ½-½ | 23 | 1927 | ASC-VAS | D45 Queen's Gambit Declined Semi-Slav |
| 32. Euwe vs P van Hoorn |
| 1-0 | 42 | 1927 | VAS-ASC | C55 Two Knights Defense |
| 33. S Landau vs P van Hoorn |
| 1-0 | 38 | 1928 | VAS Easter Tournament | D15 Queen's Gambit Declined Slav |
| 34. P van Hoorn vs Colle |
| 1-0 | 40 | 1928 | VAS Easter Tournament | E38 Nimzo-Indian, Classical, 4...c5 |
| 35. P van Hoorn vs E Spanjaard |
| ½-½ | 32 | 1928 | VAS Easter Tournament | B73 Sicilian, Dragon, Classical |
| 36. P van Hoorn vs Colle |
| ½-½ | 53 | 1928 | Colle - Van Hoorn | E32 Nimzo-Indian, Classical |
| 37. Colle vs P van Hoorn |
| 1-0 | 35 | 1928 | Colle - Van Hoorn | E94 King's Indian, Orthodox |
| 38. P van Hoorn vs Colle |
| 0-1 | 51 | 1928 | Colle - Van Hoorn | B02 Alekhine's Defense |
| 39. Colle vs P van Hoorn |
| 1-0 | 27 | 1928 | Colle - Van Hoorn | A46 Queen's Pawn Game |
| 40. P van Hoorn vs Colle |
| ½-½ | 20 | 1928 | Colle - Van Hoorn | A30 English, Symmetrical |
| 41. P van Hoorn vs E Mulder |
| 0-1 | 55 | 1932 | VAS Anniversary | A13 English |
| 42. P van Hoorn vs Euwe |
| 0-1 | 51 | 1932 | VAS Anniversary | C42 Petrov Defense |
| 43. P van Hoorn vs Euwe |
| 0-1 | 23 | 1933 | Dutch Championship | B14 Caro-Kann, Panov-Botvinnik Attack |
| 44. J van den Bosch vs P van Hoorn |
| 0-1 | 32 | 1933 | Dutch Championship | E34 Nimzo-Indian, Classical, Noa Variation |
| 45. E Mulder vs P van Hoorn |
| 1-0 | 48 | 1933 | Dutch Championship | E10 Queen's Pawn Game |
| 46. A Hamming vs P van Hoorn |
| 0-1 | 38 | 1933 | Dutch Championship | E40 Nimzo-Indian, 4.e3 |
| 47. P van Hoorn vs Olland |
| 1-0 | 37 | 1933 | Dutch Championship | D55 Queen's Gambit Declined |
| 48. H Felderhof vs P van Hoorn |
| 1-0 | 46 | 1933 | Dutch Championship | C71 Ruy Lopez |
| 49. P van Hoorn vs F A Spinhoven |
| 1-0 | 31 | 1933 | Dutch Championship | D30 Queen's Gambit Declined |
| 50. H Felderhof vs P van Hoorn |
| 0-1 | 48 | 1933 | Scheveningen | C11 French |
Kibitzing
