ArtK78, on 2013-October-04, 14:13, said:
I don't know why you are making this assertion. If I held ♦AQ9 and ♣9xx, I would bid 5♦.
The choice here is between the minors. If the opening bid were 4♠ and partner overcalled 4NT, showing two places to play, I can understand bidding 5♣ with equal length in the two minor suits if I prefer to play in partner's minor suit rather than hearts, to cater to partner having hearts and clubs. But that is not the case here.
Perhaps others will join in the discussion to point out why I should choose clubs with equal length in the two suits.
This is totally bizarre to me, but if I'm wrong and it's standard to bid 5D with this holding, I'll be pretty embarrassed.
As for why, there's a number of reasons. We have no reason to assume that D will play better than C, so keeping it low allows for us to run if we get sawed off in clubs, for example. Bidding 5C also allows more space; 4N-er can bid 5D now with whatever hand you've agreed upon, e.g., a slam try in diamonds. I just don't see the advantage of bidding diamonds over clubs here. Surely our club losers are club losers in both spots. The 4N hand can't have a suit to pitch away your small clubs. And it's unlikely (though I guess remotely possible) for you to have enough spades to pitch away all of 4N-er's losing clubs. Am I missing a convincing argument here?
edit: maybe it's an inconsistent position to claim we can run from 5Cx and that losers in clubs probably aren't going away. But to me, keeping it low is all about leaving us options (that can depend on all sorts of things - who's on lead, what our major holdings are, etc), especially with no reason to believe that diamonds will play better in any case. But like I said, I'm prepared to eat crow if I'm wrong.
edit2: To be clear, I take the same approach with Michaels / Unus2N and other known 2-suited calls. I bid the cheaper with equal lengths.
"I think maybe so and so was caught cheating but maybe I don't have the names right". Sure, and I think maybe your mother .... Oh yeah, that was someone else maybe. -- kenberg
"...we live off being battle-scarred veterans who manage to hate our opponents slightly more than we hate each other. -- Hamman, re: Wolff