[ Competition summary || West European subzonal 1A | West European subzonal 1B | West European subzonal 1C | Central European zonal 2 | Nordic zonal 3 | East European zonal 4 | Mediterranean zonal 5 | Soviet zonal 6 |
| US zonal 7 | Canadian zonal 8 | Central American zonal 9 | South American zonal 10 | West Asian zonal 11 | South-East Asian zonal 12 | Chinese zonal 13 | North African zonal 14 | South-Central African zonal 15 ||
|| interzonal || Candidates tournament | Candidates challenge match || WCh match ]