Comparing turf racing in the U.S. to the European variety isn't always straightforward. Whereas Europeans horses occasionally have to plough through very soft ground in Britain, Ireland, France, Germany and Italy, their American counterparts rarely tackle such conditions, with racecourses opting to switch races to their dirt tracks when the going becomes deep. When graded stakes are switched from turf to dirt, they are automatically moved down a grade, but there is an option for the original grading to be restored if the form is considered worthy. Consequently, the GIII...