Trinidad, on 2012-August-30, 00:54, said:
It is nice to have a non forcing "forcing 1NT", but not if it can contain support for opener's major. In those cases, you will often end up in a ridiculous 1NT contract. The effect of Drury is that it takes exactly those hands out of the 1NT response. When partner opens 1♠ in fourth seat and you hold:
♠ K73
♥ KT96
♦ KJ754
♣ 5
do you really want to bid 1NT? You may be down before you get in while 4♠ is cold. Or do you prefer to bid 2♦ and play it there opposite a weak no trump?
Something similar happens at the other end of the strength range:
♠ J73
♥ T962
♦ KJ75
♣ 54
You will be down in 1NT, but partner can make 2♠ easily. Alternatively, partner bids 2NT with 18-19 balanced and you will be forced to bid 3♠ (hoping that partner passes), where you could have simply been in 2♠.
If you play Drury, with the first hand you will bid Drury, showing about 9-11(14). This will get you to the right strain, and leaves you room to get to the right level. With the second hand, you will bid 2♠, showing about 5(4)-8. Again, you will be in the right contract.
By taking the raises out of the non forcing forcing 1NT, you will get to NT when it is right. The wide strength range will be an advantage since declarer's hand is not known. Opposite dummy's 12, you may hold 6 or 11 HCP.
Finally, you have a good point that 2♣ is useful as a natural bid since there is no weak 2 in clubs. I think that using 2♣ as Drury still wins over natural, but some people play 2♦ as Drury to retain the possibility to show a weak 2 in clubs.
Rik
On the first proposed hand, you have 12-13 in support. My solution is not to bid an idiotic 1NT (did you catch that my 1NT is usually weaker than expected) or a bizarre constructive 2D. A fit jump 3D seems no-brainer.
On the ultra weak hand, if we play 1NT with the opponents passing throughout with two 12- counts, and get a bad score, rub of a bizarro world. And what partner passes a raise with 18-19?
I handle constructive clubs well.
I have a constructive raise, too, which handles even lower strength raises better.
I also avoid the Drury- enabled cheap lead directing overcall or double or competition. Granted, I lose preemption when ultraweak, but someone usually has bid already then, anyway.
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