BunnyGo, on 2012-February-19, 16:30, said:
Set diamonds as trump with a 4♦ forcing bid over 2♦. Then bid any type of blackwood and specific kings follow up no matter the response. If partner has the spade A, bid 6 or 7 NT (gambles on a diamond entry to the A or a spade lead). If partner has the club K bid 7.
Agree with 4
♦. If partner bids something other than 5
♦, is it showing 1st or 2nd round control? Probably doesn't matter unless we're going to gamble on 7NT if partner shows
♠A. After 4
♠ I'll cue 5
♥ which should indicate I'm looking for a
♣ control. After 4
♥ I'll cue 4
♠, and after 5
♦ next cue 5
♥, for the same reason.
If partner bids 5
♦, 5NT looks like GSF rather than specific King ask, but if it is a King ask and partner bids 6
♠ showing
♠K and not
♣K, we'll have to bid 6NT and hope North has
♠A or
♠ are not led. I'd prefer to cue 5
♥ and after 5
♠ bid 6
♦. Partner should again realize I'm looking for 2nd round
♣ control for grand.