Oscar Soberon, International Course Designer August 22, 2013, Gloucester, Massachusetts- An exciting new venue and a new course designer are coming to The Jumper Classic equestrian show jumping competition this September 4-8 in Ipswich, Massachusetts. International course designer Oscar Soberon will give riders a new opportunity to challenge their skills on a beautifully-maintained grass polo field on magnificent 100-acre Maplecroft Farm in the heart of horse and hunt country.