From a Golf Channel press release.
ORLANDO, Fla. (April 25, 2017) – The PGA TOUR moves to Louisiana this week to unveil an exciting new format at the Zurich Classic of New Orleans. 80 two-man teams will compete in a 72-hole event that will feature a stroke play, alternate-shot format in the first and third rounds, and a better-ball format in the second and final rounds. The LPGA Tour this week boasts a field that includes the entire top-20 in the current Rolex Women’s World Rankings, all convening at the Volunteers of American Texas Shootout.