How many shots does it take toconvert a big split or difficult spare?That could be the determiningfactor when six of the nation's top womenbowlers return to TV in April, competing in a radically differentbowling format for the $25,000 top prize in thePBA's inaugural Women'sSeries Showdown presented by the United States BowlingCongress.The special event, to be hostedby Kegel Training Center in Lake Wales, Fla., will result inback-to-back one-hour...