History
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.Winners
References
Sources
List of previous winners, Page 2 2007 winners, Page 1 2008 winners, Page 1 2019 winners, Page 1External links
* {{Official website, http://www.acbl.org/ North American Bridge Championships