dick payne, on 2014-March-10, 12:27, said:
I have always played a weak no trump and four card majors. In the present climate there is a huge weight of opinion in favour of a strong no trump and five card majors. I would be very interested to hear the argument in favour of this
We're talking 4-cd majors within a strong club context I assume?
I don't know which is better, but I'm used to 5-cd majors and strong NT and some things I like about the former are...
1) 5-cd majors are less preemptive. This allows for better auctions for us (and admittedly our opponents) in many ways. There's sufficient room to relay out opener's entire shape if he promises 5 in the major. I don't think this can be done with 4-cd majors unless many hands are offloaded somewhere else. 5-cd majors provide an "anchor suit" which allows an 1N response to be forcing or semiforcing (contain GI strength) because there is such a likelihood of finding either tolerance (a 5-2 fit) or a better part score. The forcing or semiforcing NT allows for delayed invitations (2N, raise of second suit, jump in responder's suit, or delayed limit raise) which is not possible if 1M-1N shows something like 6-10.
2) 5-cd majors allow for easier raises with 3-cd support. Certainly you can always raise with 3, but it will be wrong more frequently.
3) 5-cd majors clarify auctions such as 1M-1N, 2m (i.e. which suit is longer) and allow for a false preference to the major which can give opener another chance to bid. Lack of clarity with 1M-1N, 2m (if that sequence doesn't specify which suit is longer) means that we can't make a false preference.
4) 4-cd majors induce or require 2/1s to be invitational+ such that responder is trying to describe his hand in a very preempted auction and without necessarily game forcing values. As a rule of thumb, I think it's best when one hand starts to describe shape to let that continue as much as is possible.
5) With relays it is really quite possible to open 1D with 0+ diamonds (or possibly 2+ diamonds) and show one's entire shape. Many here have discussed options of how to go about this (look up IMprecision for one) such that we don't have to miss those minor suit slams you were referencing. Imo 0+ diamonds is easiest for relays. If you're not inclined toward relays, then 2+ will probably serve you better.
6) If I want relays it makes the most sense to group all of my 5-cd majors into 1M because I have the room to do so and because it's easier for responder to respond when he's aware of that fifth card and can't relay. Were I instead to offload some of my 5-cd major hands into 2M preempts or whatever, I'd have a mix of 4M/5m, 6M, 5M332 etc that might well be "relayable" but would be something of a hodgepodge. I want pd to know of the 5th card right away. I'd also lose my 2M preempts.
and about the latter...
1) strong NTs get a fairly good hand off my chest. If I open 1D with 14-16 (my strong NT range) and the opponents get in the way my hand is not strong enough to do much but I will regret not doing anything either. We might miss game. If I open a nebulous diamond (containing my weak NT) it allows them an easier entry into the auction but I don't feel like I'm being robbed of anything if partner can't act.
2) opening 1D with the weak NT range allows me to find 4-4 major suit fits without getting too high. With 1D weak and 1N strong both support fit-finding in proportion to their offered strength.
In sum, I think 4-cd majors and weak no trumps are slight overbids which tend to impair our constructive auctions while simultaneously preempting the opponents as well. So it's really hard to judge who is hurt most by these overbids. I'd guess you'd find a lot of support on the forum for 5-cd majors and strong NT because so many folks are just used to playing these (especially in North America) and because this is a forum for artificial systems and 5-cd majors are arguably more conducive to relays.