The takeout double
This is the most economic overcall and calls for the other 3 suits. It promises:
- either at least 12-13HCP and at least 3 cards in all the other suits. Don't double with a short-suited major that hasn't been called.
- or at least 18 HCP with any distribution
Careful! With a strong hand, always start by doubling...even with a very good suit.