Four players per table form two sides, North-South and East-West (Law 4); In pair or team events contestants enter as pairs or teams and keep the same partnership throughout a session; in individual events partnerships change during the session (Law 4); The Director assigns an initial position to...
Source: Law 4, Law 5 — American Contract Bridge League — Laws of Duplicate Bridge
Why people argue about this
People often assume that in individual events of Duplicate Bridge, partners must remain together throughout the session, which can lead to misunderstandings since the official rule states partnerships change during the session, allowing for different pairs to compete against each other at various tables based on the Director's initial assignment.
