The 2015 U.S. Open lane pattern proved to be as difficult as expected in the Greater Iowa Bowling Association 11thFrame.com Open qualifying at Cherry Lanes in Dubuque, Iowa, on Saturday, with under a 200 average needed to make the cut to Sunday. The 3-squad field of 155 players — one shy of full due to a late withdrawal — bowled six games of qualifying with the top 48 advancing to Sunday’s 12 games of “Flanagan format” semifinals and the top four then...