Negative double

The negative double (sometimes called the Sputnik double) is a form of takeout double in bridge. It is made by the responder after his right-hand opponent overcalls on the first round of bidding, and is used to show both support for the unbid suits as well as some values. It is treated as forcing, but not unconditionally so. In practice, the negative double is sometimes used as a sort of catch-all, made when no other call properly describes responder's hand. Therefore, a partnership might even treat the negative double as a wide ranging call that merely shows some values.

Usage

Using the modern negative double convention, it is understood that a double over an initial overcall is conventional, and not for penalties (but see Playing for penalties). For example, using this convention, the following doubles would be regarded as negative, not for penalty:

In understandings regarding negative doubles, the emphasis is on major suit lengths. This is largely due to the special value that tournament play, especially the pairs game, places on major suits. Since the mid-1980s, the negative double has been used mainly to stand in for a bid in an unbid major suit.