Posted 2006-April-02, 11:36
After 3C partner is forced to bid (and to keep bidding) so we should just be expecting him to do his best. There is no reason to think he has anything extra. I imagine with a lot of spades and no fit for either minor, he would just rebid spades. 3H I take to allow you to show some modest spade support if you have it, or to bid 3N if you like, or to show your shape, as you did, by bidding 4C. He presumably has some hearts mostly because if he didn't, he would probably have a more descriptive bid.
After 4C-4D I think diamonds are trump. He doesn't have many, but you have said please choose and he has chosen. I really don't think he can pass 5H unless he wants to take a very deep position. In particular I think 5H does indeed ask about the Q (of trump, ie diamonds). Risky though.
I would not be seeking 7 on the actual hand. Partner agreed to diamonds only after you insisted. He hasn't shown extras. You have some losers to deal with. 6D is plenty high, and 5D may be right. To try for 6, I think that over 4D you could bid 4H (I suppose he will pass, but I really don't think he should), he can bid 4S, you can bid 5D and let him bid 6 if he has anything extra, or maybe 5C over 4S and then accept his decision. He could have some extras somewhere, but he hasn't shown them so let him choose between 5 and 6.
These things are tough for a casual partnership, and maybe you should just make your best guess. But I really think diamonds are trump after the 4D bid. If I had four hearts I would have bid hearts over 1S, and if I had three hearts I would have raised 3H to four (safe, since I cannot have four of them having not bid them earlier).
Ken
Ken