[Winstonm]

I think the question to ask is: what should this double mean? What hand has the most difficulty expressing itself in this situation? Opener has not denied a fit for hearts with the pass. What can responder do with a hand unwilling to sell out to 2S but not good enough to try for game? x, Kxxxx, KJx, Jxxx for example?

To me, that is the best use.

[Zelandakh]

Winstonm, on 2016-August-02, 22:37, said:

What can responder do with a hand unwilling to sell out to 2S but not good enough to try for game? x, Kxxxx, KJx, Jxxx for example?

If you play transfer rebids you can try 2NT with that hand. If you use 2NT as Lebensohl then you can still say 2NT but with a different meaning. If playing double in the suggested way, you do not need it as a natural call.

[Winstonm]

Zelandakh, on 2016-August-03, 03:10, said:

If you play transfer rebids you can try 2NT with that hand. If you use 2NT as Lebensohl then you can still say 2NT but with a different meaning. If playing double in the suggested way, you do not need it as a natural call.

Yes. Every bid assignment creates a hole, a hand that cannot be bid, and the point of designing a system is to make best use of the available bids.

[lycier]

rmnka447, on 2016-July-25, 14:23, said:

I would think that this double is a balance of power double presumably showing ♠ shortness and at least 7-8 HCP.

Yes.

Now here I would take a hand example. This hand is from 2016-Spingold final segment of 1 of 4.

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[wanoff]

What of the related auctions where you pass or use Stayman rather than transfer ?
Or they reopen with an artificial bid such as 2C=H+another.

a. 1NT P P 2S P P X

b. 1NT P 2C 2S P P X

c. 1NT P P 2C P 2H(3+) X

[Zelandakh]

wanoff, on 2016-August-05, 04:14, said:

What of the related auctions where you pass or use Stayman rather than transfer ?

I think there are some similarities with b but that a and c are a different family and require a different treatment.

[nullve]

gnasher, on 2016-July-31, 21:25, said:

Opener assumes 2-5 in the majors and bids accordingly.

This is what makes the most sense from a LoTT perspective.