Posted 2016-July-11, 13:51
I don't think I'd bid on on any of them. We need several things to be true for it to score well:
1) 5♠ has to be making
(or 1.1, 6♦ has to be, but that seems so remote as to be ignorable)
2) 6♦ has to be at most 2/3 down
3) They have to not be bidding and making 6♠ when we push them
and
4) Few people in the room can be buying it in 5♦(x) - if they are, we're already marked for a bottom
1 seems reasonably likely, but hard to be tremendously confident in, presuming our 2NT can be a wide range of strengths.
2 again seems pretty likely, but far from certain
3 is probably the factor I'm most scared of. If they need trumps to behave, they will be. This is probably a bigger factor when we're NV, as either opp looking at xx in Ds might not have placed their P with definite shortage, but after a 6/5 bid they'll surely be able to (also, if they're reasonably confident they're not beating it by 4 tricks and that they were making 5♠, they might be forced into bidding it just to give themselves a chance to avoid a bottom)
4 is really hard to judge the odds of, and probably requires a bit of opp-reading - eg how long did E think before bidding 5♠? But I'm rarely going to be confident about this either way
The "4♥ is a transfer to 4♠" award goes to Jinksy - PhilKing