double-dummy problem

In bridge, a "double dummy" problem occurs when all four hands are exposed, allowing players to see every card. This scenario is used to study and improve card play proficiency. While seeing all cards simplifies some complex plays, certain challenging maneuvers, like the "squeeze," are common themes in these problems. The "Great Vienna Coup" is an example of a difficult play that even expert whist players struggled with, but is considered commonplace among contract bridge players in a double-dummy situation. The concept of double dummy is distinct from Duplicate Bridge, where hands are replayed to eliminate luck and focus on skill.1234