Agreed and this is standard, but someone please tell me good reasons why it isn't the other way around? ie Pass=dbl negative and X=positive? Thx .. neilkaz .. I always thought the reason, or one of them, was to preserve the option of punishing the opponents. Playing pass=positive, and knowing partner has something, opener can double back with the balanced 22-24 point hand, surely one of the most common hand types for the 2C opener. With more, or a different hand type (strong one- or two-suiter or whatever) opener can do something else. And responder, with a couple of cards and some trump length, can convert; or do something else descriptive. Playing dbl=positive, you will never nail the opps unless opener has the overcall beat in his own hand, since he doesn't know the nature of the positive response.