fromageGB, on 2014-January-30, 06:43, said:
Yes, I got it wrong. You need to play out the reds to see how many clubs North started with, and even if it's 50/50 taking a losing finesse still beats those in slam, which is what I overlooked.
There is a possibility for some interesting choices here. On the actual hand North was 5-2-4-2 but suppose he was 5-2-3-3. Declarer wins the second spade,and runs five hearts. North has to hold onto the spade J so he must toss a minor on the fifth heart. If he tosses a diamond then declarer tosses a spade and runs the diamonds. On the third diamond North must choose between tossing a club or his last spade. If he tosses the spade, then the finesse is a no-brainer in that even if it loses declarer takes the rest. So of course he tosses a club when he holds xxx, hoping declarer lacks the courage to finesse. But now declarer has to ask himself if North, holding Qxx in clubs, would have been up for tossing a club, a play that gets him two tricks or none, depending on declarer's next move.
If North believes that declarer will go with the finesse with an original distribution of three clubs on his left, four on his right then he needs to come down to Qx and J. but then declarer might cash AK and be delighted that N made this "error".
As to my bidding, I imagine I'll change my ways. I can construct and I am sure you all can construct hands where my partner has four hearts and the hand takes one more trick in hearts than it does in no trump, and this is what I was catering to. But I think, at least maybe, that the hands where the same number of tricks are available in hearts as in no trump are more frequent. For example, if partner has four hearts (remove opne of his spots) and AJxx of diamonds, his clubs and spades unchanged, then the hand makes 12 tricks in hearts without taking the club hook. But for this to work, partner first has to have that diamond holding and, for it to do any good, the club finesse has to fail. If the club finesse is working, declarer has 1+4+4+3=12 tricks in NT anyway.
So there will be times that raising 1NT to 3NT will be wrong, and hopefully partner will forgive me if this happens, but I think maybe I do it.