Often a handful of Europeans
Americans participated among a majority of South Americans in
the Argentine international events.
An exception was Buenos Aires 1960, when most
players came from other continents.
Clarin tournaments happened after the second
Olympiad, Buenos Aires 1978. These events revived the
participation by mostly
foreigners. That had become usual internationally.
World champion Karpov had little success in the
third and fourth Clarin event.
A long period of economic depression followed after
Mar del Plata 1982.
international tournaments were organised in
Argentina, the wealthy Najdorf stepped in. He
started an annual series in April 1990. Najdorf Memorial
12 in 2001 became the last closed international
event. The rise and fall of Argentine chess
coincided with the later life of Najdorf.