- p.066 1969 Quito, Ecuador
- p.080 1975 Santo Domingo, Dominican Republic
- p.134 1985 San Juan, Puerto Rico
- p.148 1990 Pinar del Rio, Cuba
The first two events square with my notes on the World Chess Championship Zonals, but the last two don't. I have:-
- 8 Caracas 1985-03
- 8 Cali 1990-04 8? Pinar del Rio CUB 1990-00
From this I gather that Hook's 1985 and 1990 events were subzonals, preliminary events where the top players in a region compete for the right to play in the zonal. I've encountered other mentions of these from time to time, but always pushed them aside, since I had enough on my plate tackling the zonals themselves. It's time to take them more seriously.
A few recent news reports mentioned that subzonal 2.3.5 was in full swing. A search on the FIDE America site returns about 19,000 from fideamerica.com for subzonal. Most of these are because the keyword 'subzonal' is currently used in a sidebar.
This leads to a few new topics of research:-
- When were subzonals introduced in the Central American zone?
- Are subzonals used in other FIDE zones? (I think I've seen them in Asia/Oceania)
- Where is it documented how different zones have split themselves into subzones?
One document which could be useful is 'Regulations for the America's Men and Women Subzonals Tournaments', but I haven't located it online.