We demonstrate the cardinal rule of leeward-mark roundings: start wide and finish tight. Using an example from the 2013 Melges 24 World Championships, we show how failing to start wide and finish tight at the leeward mark puts a boat in a lower lane than her competitors: in that lower lane, she starts the windward leg at a serious disadvantage.  It's a great lesson and an eye-popping example of some of the world's best sailors making a classic mistake.