From driving irons to mini drivers, Royal Portrush baffles players ahead of British Open  PGA TourBritish Open 2025: With controversial internal OB, is this the hardest tee shot in the Open rota?  Golf Digest3 Course Management Secrets From The Open’s Most Feared Hole (Calamity Corner)  MyGolfSpyThere may be carnage at Calamity Corner, Royal Portrush’s brutal but beautiful par 3  GolfweekCalamity Corner: the Daunting, Controversial Par-3 That Could Decide the British Open  Sports Illustrated