Some hands are too strong for a simple overcall. For example, suppose you hold:
|AK9853 AK4 QT87|
and your opponent opens 1.
If you overcall 1,
your partner will almost definitely pass, and you could easily miss game.
The solution is the strong double. Here is the convention:
For example, on the above hand you would double and then bid spades.
The Procedure. There are three steps in the bidding of a strong double:
1. Make a double.
2. Your partner, thinking the double is for takeout, will respond with an unbid suit.
3. Make your second bid. This alerts partner to the fact that your double was not for takeout but was instead a strong double. (Takeout doubles and strong doubles are entirely different conventions.)
The Second Bid. Here are some example second bids: