(Another meet, the World Bridge Games, is held quadrennially in leap years.)
Most of its world championship events are open in the sense that entries do not represent geographic zones or nations.
The World Knockout Teams for the Rosenblum Cup was inaugurated in 1978 and soon became the most prestigious event of the meet.
The United States won all American qualifications, whilst Europe was represented by Italy, England, France and Sweden.
In addition to the foregoing, the World Transnational Open Teams Championship is contested during the late stages of the main events.