PhilKing, on 2015-January-05, 05:14, said:
If 2♠ is forcing, surely it is 18-30 so it's even more forcing. I would bid 2NT under the conditions.
However, in my opinion, it is absurd to play 2♠ as strong here, but I know I am in a minority when it comes to doubling 1♦ with a weakish 5404 shape. While I'm at it, 1NT showing 7-10 is an example of the Ostrich system - it only works on the basis that you never get dealt fewer than 7 points.
I am a strong believer that if takeout doubler of 1M removes 1N to a minor, this is scrambling and not strong. However, I don't play that way after a double of 1m.
I suppose that is because, as you suggest, I would tend to overcall most hands with 5440 and a 5 card major and roughly opening values rather than double.
As for the ostrich comment, I think that is unfair. Yes, it can sometimes result in responder bidding a 3 card major at the 1-level because he is too weak to bid 1N, but otoh when he does bid 1N, it is now a constructive call, allowing doubler to assess game chances far more accurately than when 1N could be 5-10. As with almost any plausible treatment, there are pros and cons and, as is customary, we tend to see the cons of a method we don't like and ignore or downplay the pros.
On the OP hand, I bid 2N, given the methods. I don't think 1N was an overbid given the 10's and the 4th diamond.
The more interesting issue is the difference between the various non-pass calls. Surely, if the explanation is correct, we are in a gf auction?
I wouldn't be. I would expect partner's range to start at a very good 16.
But, given the conditions, 18-20 with a suit should be gf. Now there ought to be a distinction between 2N and 3N, and not based on hcp if the OP is correctly describing the methods. Slam is impossible, game is forced, so it makes sense to me for 2N to suggest notrump but with some doubt and 3N to show certainty.
As for the notion by nuno that partner would cuebid with all monsters, that makes no sense to me, since it then requires that he start his natural bidding at the 3-level on precisely those hands on which bidding space is most needed. However, I am trying to respond within the confines of the described methods, no matter that I don't like them.
Btw, I wouldn't play partner for a suit such as AKQxxx since most hands with that kind of suit bid 3N, assuming that we play that 1N showed a stopper.
'one of the great markers of the advance of human kindness is the howls you will hear from the Men of God' Johann Hari