Playing a weak NT and 4CM my partner opened a club and rebid 1NT after 1H from me and a 2d overcall. The 1NT bid promises a stopper in daimonds. The question was, do I double? I did and the contract made. I reasoned that my partner was likely to have 3 diamonds and we had at least 23 HCP. Obviously it didnt work out well but was the reasoning sound? [hv=pc=n&s=st3haqt84dt52cq94&w=saj875h9632dct763&n=s642hkj5da98cakj5&e=skq9h7dkqj7643c82&d=s&v=n&b=15&a=pp1c1d1hp1n2ddppp]399|300[/hv]