aguahombre, on 2014-September-16, 10:14, said:
Transfer preempts: If Double of a one-under preempt is agreed as takeout of the next suit, isn't it also penalty of the suit bid?
No. The fact that some hands are suitable for both actions doesn't mean that the two definitions are equivalent, or that all hand that qualify for one also qualify for the other. If they opened 3♦ showing hearts, I would show a takeout double of hearts with AQxx x Kxx QJxxx, but I wouldn't show a penalty double of diamonds.
Similarly, if I had xx xx KQ10xx Axxx I'd show a penalty double of diamonds, but not a takeout double- of hearts.