NEWPORT, R.I. — How to balance risk against reward is always a key decision early in a regatta. That applies double for the Rolex New York Yacht Club Invitational Cup where the unique nature of the event means there's no reliable pre-regatta form guide. In a few days, we'll know which teams came prepared to win and which are a little off the pace. But for the start of Race 1 earlier today, there were 20 contenders of unknown caliber attacking the starting line.