I've been reading enough replies from you all by now that I ought to know I could not get away without posting the bidding. Initially I was after a pure probability response - throw the other 26 cards in the air and have then land randomly. Next time I'll make sure to post the bidding and then be clear in what I'd like to discuss. Here is the bidding. [hv=pc=n&s=s97hkqt86432d3c84&n=sha7daqj864cajt93&d=n&v=0&b=1&a=3c(Diamond%20-%20weak%20or%20various%20strong)d4h4s5c(strong%20D%2BC)d5hp5s(spade%20control)p6hppp]266|200[/hv] West leads 6S East's X is nominally Clubs, the second one definitely so - "you are not making 5C". South is expecting opener to hold a D pre-empt (1st seat GvG - almost certainly won't be as good as 9 hcp). 4H shows a good, long heart suit either "to make" or as a further pre-empt. I can work out all the hearts 2-1 lines - ruff low or high / KD finesse or ruffing finesse - but the 3-0 lines get very fiddly to work out with every split of both red suits coming into the equation. I think Douglas43 line of ruff low (retain AH) and cash AD and a low D might be best - keeps most options open the longest ?