Wiktionary
interzonal
a. Between zones.
Wikipedia
Interzonal
Interzonal chess tournaments were tournaments organized by the World Chess Federation FIDE from the 1950s to the 1990s. They were a stage in the triennial World Chess Championship cycle and were held after the Zonal tournaments, and before the Candidates Tournament. Since 2005, the Chess World Cup has filled a similar role.
Usage examples of "interzonal".
Where can you run to on a speeding interzonal train, rendered transparent to left and right by sash windows, mostly stuck, if not to the john.