| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 276. Westerinen vs N Cortlever |
| 0-1 | 59 | 1970 | Amsterdam IBM-B | C80 Ruy Lopez, Open |
| 277. N Cortlever vs B Kurajica |
| ½-½ | 21 | 1971 | Hoogovens-Cb | D31 Queen's Gambit Declined |
| 278. N Rischbieth vs N Cortlever |
| ½-½ | 40 | 1971 | Hoogovens-Cb | C26 Vienna |
| 279. F Henneberke vs N Cortlever |
| ½-½ | 18 | 1971 | Hoogovens-Cb | A02 Bird's Opening |
| 280. N Cortlever vs R Oechslein |
| 1-0 | 26 | 1971 | FRG-NED | C90 Ruy Lopez, Closed |
| 281. Denker vs N Cortlever |
| 0-1 | 51 | 1972 | Hoogovens-B | D85 Grunfeld |
| 282. N Cortlever vs Ribli |
| 0-1 | 47 | 1972 | Hoogovens-B | B90 Sicilian, Najdorf |
| 283. E Gereben vs N Cortlever |
| ½-½ | 15 | 1972 | Hoogovens-B | A48 King's Indian |
| 284. N Cortlever vs D Sahovic |
| 0-1 | 42 | 1972 | Hoogovens-B | C02 French, Advance |
| 285. A Medina Garcia vs N Cortlever |
| 1-0 | 56 | 1972 | Hoogovens-B | C83 Ruy Lopez, Open |
| 286. N Cortlever vs W Schmidt |
| 1-0 | 63 | 1972 | Hoogovens-B | B22 Sicilian, Alapin |
| 287. B Cafferty vs N Cortlever |
| ½-½ | 15 | 1972 | Hoogovens-B | C55 Two Knights Defense |
| 288. N Cortlever vs S Garcia Martinez |
| 1-0 | 47 | 1972 | Hoogovens-B | B22 Sicilian, Alapin |
| 289. E Scholl vs N Cortlever |
| 1-0 | 56 | 1972 | Hoogovens-B | B18 Caro-Kann, Classical |
| 290. N Cortlever vs N Karaklajic |
| 1-0 | 51 | 1972 | Hoogovens-B | B13 Caro-Kann, Exchange |
| 291. H Lehmann vs N Cortlever |
| ½-½ | 40 | 1972 | Hoogovens-B | D93 Grunfeld, with Bf4 & e3 |
| 292. N Cortlever vs H Hecht |
| 0-1 | 50 | 1972 | Hoogovens-B | B05 Alekhine's Defense, Modern |
| 293. B Enklaar vs N Cortlever |
| 1-0 | 34 | 1972 | Hoogovens-B | D06 Queen's Gambit Declined |
| 294. N Cortlever vs T van Scheltinga |
| 1-0 | 31 | 1972 | Hoogovens-B | B84 Sicilian, Scheveningen |
| 295. Z Krnic vs N Cortlever |
| 1-0 | 24 | 1972 | Hoogovens-B | C32 King's Gambit Declined, Falkbeer Counter Gambit |
| 296. F Kuijpers vs N Cortlever |
| 1-0 | 66 | 1973 | Wijk aan Zee M 4-K | D19 Queen's Gambit Declined Slav, Dutch |
| 297. F Henneberke vs N Cortlever |
| 0-1 | 42 | 1973 | Wijk aan Zee M 4-K | A03 Bird's Opening |
| 298. N Cortlever vs H Smout |
| 1-0 | 41 | 1973 | Wijk aan Zee M 4-K | C26 Vienna |
| 299. R Hartoch vs N Cortlever |
| ½-½ | 25 | 1973 | Amsterdam VAS Jubilee | D18 Queen's Gambit Declined Slav, Dutch |
| 300. N Cortlever vs R Hartoch |
 | 1-0 | 35 | 1973 | Amsterdam VAS Jubilee | B46 Sicilian, Taimanov Variation |
Kibitzing
