| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. N Cortlever vs R Broadbent |
 | 0-1 | 55 | 1939 | Netherlands - England | C05 French, Tarrasch |
| 27. Saemisch vs N Cortlever |
 | 0-1 | 29 | 1939 | Bad Harzburg | A95 Dutch, Stonewall |
| 28. Eliskases vs N Cortlever |
| 1-0 | 61 | 1939 | Bad Harzburg | A06 Reti Opening |
| 29. L Rellstab vs N Cortlever |
| 0-1 | 64 | 1939 | Bad Harzburg | C83 Ruy Lopez, Open |
| 30. N Cortlever vs A Asgeirsson |
| 0-1 | 42 | 1939 | Buenos Aires Olympiad qual-3 | C42 Petrov Defense |
| 31. C Poulsen vs N Cortlever |
| ½-½ | 40 | 1939 | Buenos Aires Olympiad qual-3 | B13 Caro-Kann, Exchange |
| 32. N Cortlever vs P Vaitonis |
| ½-½ | 40 | 1939 | Buenos Aires Olympiad qual-3 | B80 Sicilian, Scheveningen |
| 33. S Morales vs N Cortlever |
| ½-½ | 88 | 1939 | Buenos Aires Olympiad qual-3 | D83 Grunfeld, Grunfeld Gambit |
| 34. J O'Hanlon vs N Cortlever |
| 0-1 | 25 | 1939 | Buenos Aires Olympiad qual-3 | B74 Sicilian, Dragon, Classical |
| 35. N Cortlever vs F Apsenieks |
| ½-½ | 30 | 1939 | Buenos Aires Olympiad Final-A | B14 Caro-Kann, Panov-Botvinnik Attack |
| 36. A Gromer vs N Cortlever |
| ½-½ | 85 | 1939 | Buenos Aires Olympiad Final-A | B18 Caro-Kann, Classical |
| 37. C Poulsen vs N Cortlever |
| 0-1 | 53 | 1939 | Buenos Aires Olympiad Final-A | B70 Sicilian, Dragon Variation |
| 38. Najdorf vs N Cortlever |
| 0-1 | 27 | 1939 | Buenos Aires Olympiad Final-A | D96 Grunfeld, Russian Variation |
| 39. M Castillo vs N Cortlever |
| ½-½ | 33 | 1939 | Buenos Aires Olympiad Final-A | D95 Grunfeld |
| 40. N Cortlever vs E Lundin |
| ½-½ | 30 | 1939 | Buenos Aires Olympiad Final-A | C48 Four Knights |
| 41. N Cortlever vs A da Silva Rocha |
| ½-½ | 41 | 1939 | Buenos Aires Olympiad Final-A | B74 Sicilian, Dragon, Classical |
| 42. N Cortlever vs Keres |
| 0-1 | 65 | 1939 | Buenos Aires Olympiad Final-A | C49 Four Knights |
| 43. J Foltys vs N Cortlever |
| ½-½ | 38 | 1939 | Buenos Aires Olympiad Final-A | D96 Grunfeld, Russian Variation |
| 44. N Cortlever vs J Bolbochan |
| ½-½ | 33 | 1939 | Buenos Aires Olympiad Final-A | B45 Sicilian, Taimanov |
| 45. P Michel vs N Cortlever |
| ½-½ | 39 | 1939 | Buenos Aires Olympiad Final-A | C83 Ruy Lopez, Open |
| 46. Euwe vs N Cortlever |
| 1-0 | 11 | 1940 | Beverwijk | A90 Dutch |
| 47. N Cortlever vs A J Wijnans |
| 1-0 | 21 | 1940 | Beverwijk | B72 Sicilian, Dragon |
| 48. N Cortlever vs T van den Tol |
| 1-0 | 31 | 1940 | VAS-NRSV | C05 French, Tarrasch |
| 49. N Cortlever vs G van Doesburgh |
| 1-0 | 32 | 1940 | Leeuwarden | C02 French, Advance |
| 50. H Kramer vs N Cortlever |
| 1-0 | 31 | 1940 | Leeuwarden | A95 Dutch, Stonewall |
Kibitzing
