[Lurpoa]

Playing BWS2001 2/1 Default , what is a 1NT rebid by the doubler ? As in:
[1♦ ] Dble [pass] 1♥
[pass] 1NT
Playing a more traditional system, with a an overcall limited to 15(16) H and a 1NT overcall of 15-17, I used to play that 1NT rebid as showing 18-20 , regular hand and stop in opener's color.

But in BWS2001:
(1) A direct-position one-notrump overcall shows a strong 15 to 18 points, regardless of the suit opened.
(2) The normal simple overcall maximum is 18 HCP with 5-3-3-2 distribution or the equivalent after trading off high cards for shape.

So normally I would expect that a 1NT rebid shows something like 19-21 HP, with stop....

Is that correct ?

[mgoetze]

Points, schmoints!

The 1NT rebid is stronger than the 1NT overcall. This principle applies regardless of whether your 1NT overcall shows 15-17 HCP, 13-16 HCP, 6 LTC, or 30-38 ZAR points.

Incidentally, I don't know anything about traditional systems, being rather young and not having the disposition of a historian, but from all I've ever heard the 15-18 1NT overcall is the normal one.

[lexlogan]

Yes, double-then-notrump shows a hand too strong to overcall notrump immediately; I would suggest 19-22, with double-then-jump-in-notrump 23-24, but 19-21 and 22-24 is probably the default understanding.

[Fluffy]

I think 19-20 is the standard, but you should adjust your HCP to the knowledge of RHO having opening strenght.

What I mean is: 1NT rebid is actually 18-21, just that some 18 counts are better than some 20 counts, you have a lot of stuff to reevaluate.

For example, a holding of KQJ versus a holding of AQJ, given that RHO has aproximatelly 2/3 of the points left, is 2/3 of a trick better, so 2 HCP better.

Worst holdings when RHO and us have a lot of strenght are those who don't work with it, something like AK(Q), Qx, Jx(x), KQ(J)

While best are tenaces (but not too many) AQ(10)x, KJ9, KQ10x, AKJx etc.

Contrary to other situations, you would prefer to have AQxxx KJx than AKQJx xxx