Wikipedia
Mini-Spingold
Mini-Spingold national bridge championships are held at the summer American Contract Bridge League (ACBL) North American Bridge Championship (NABC). They were introduced in 2001 and are held at the same time as the main Spingold knockout team championship.
The Mini-Spingold comprises two simultaneous knockout team events. The Mini-Spingold I typically lasts 5 to 6 days with each day being a round consisting of two sessions of 28 boards. Since 2006 the Mini-Spingold II has been limited to 5 days, so teams may play two matches on the first day.