The Roth Open Swiss Teams is a national bridge championship Swiss Teams event held at the summer American Contract Bridge League (ACBL) North American Bridge Championship (NABC).
Roth Open Swiss Teams Wikipedia
Known originally as the Open Swiss Teams, it is a national-rated event first held in 2005 and renamed in 2010 as the Roth Open Swiss Teams in honor of Al Roth. The event is a four-session Swiss teams, with two qualifying and two final sessions, typically starting on the second Saturday of the summer NABC; it is open. Scoring is by IMPs that are converted to victory points.