Game |
| Result | Moves |
Year | Event/Locale | Opening |
251. P M Jamieson vs W Heidenfeld |
| 1-0 | 33 | 1974 | Irish Times Easter | C07 French, Tarrasch |
252. W Heidenfeld vs B Kernan |
| 1-0 | 61 | 1974 | Irish Times Easter | C50 Giuoco Piano |
253. P G Henry vs W Heidenfeld |
| ½-½ | 20 | 1974 | Irish Times Easter | C10 French |
254. W Heidenfeld vs C Lee |
 | 1-0 | 24 | 1974 | Nice Olympiad qual-5 | C00 French Defense |
255. W Heidenfeld vs H Hecht |
 | 0-1 | 54 | 1974 | Nice Olympiad qual-5 | B02 Alekhine's Defense |
256. H L Gavey vs W Heidenfeld |
| ½-½ | 39 | 1974 | Nice Olympiad qual-5 | C13 French |
257. W Heidenfeld vs P Tumurbator |
| ½-½ | 19 | 1974 | Nice Olympiad Final-C | C50 Giuoco Piano |
258. R Ocampo Vargas vs W Heidenfeld |
| ½-½ | 30 | 1974 | Nice Olympiad Final-C | C07 French, Tarrasch |
259. W Heidenfeld vs Chandler |
| 0-1 | 20 | 1976 | Guernsey op 2nd | B22 Sicilian, Alapin |