[ekim123]

we are playing 2/1 and my partner opens and our opponents remain silent during auction. Partner opens 1 spade and I respond 1 NT, partner jumps to 3 clubs. What is my best rebid and what does partner do after my rebid? My hand is Qx xxx AJ9xxx Kx. Expert responses please.

[P_Marlowe]

3C is GF, hence pass is out.
Bidding your 6 carder now, seems like the most natural thing,
what partner will do, is hard to say, given his hand is missing.

[rmnka447]

The bad hand default here would be 3 ♠. You have a good hand so there's no reason not to bid your suit with a 3 ♦ bid. It also has the advantage of here using up the least bidding space to give partner a better chance to describe their hand.

[The_Badger]

Welcome to the forum.

I think you have to accept that 2/1 bidding, especially after a nebulous 1NT response, isn't a perfect science. Here you could have a poor six count, or a useful eleven count. Bidding your six carder seems to be the most natural thing to do, but you'd be bidding your six carder with ♠x ♥xxx ♦KQJTxx ♣xxx.

As Uwe (P_Marlowe) says, if you treat 3♣ as game forcing, the opener bidder should have nearer a 18-19+ count than a 16-17 for a high reverse. There's also the other consideration that with 5-5 black-suited many players will open 1♠ these days as opposed to 1♣.

Bidding 3NT without a ♥ stopper on a wing and a prayer is a definite no-no in my opinion. 3♦ keeps the bidding low and allows partner to describe his hand further.

[neilkaz]

rmnka447, on 2018-September-20, 15:50, said:

The bad hand default here would be 3 ♠. You have a good hand so there's no reason not to bid your suit with a 3 ♦ bid. It also has the advantage of here using up the least bidding space to give partner a better chance to describe their hand.

3♦ seems automatic to me.

[bgm]

The problem is more interesting if the minors are swapped, for both partner's and yours.

[pescetom]

neilkaz, on 2018-September-20, 16:25, said:

3♦ seems automatic to me.

Obligatory I would say, you have no right or reason to bid differently. Partner will probably rebid 3S (still forcing) or 3NT, but that's his problem.

[rmnka447]

pescetom, on 2018-September-21, 15:54, said:

Obligatory I would say, you have no right or reason to bid differently. Partner will probably rebid 3S (still forcing) or 3NT, but that's his problem.

If opener finds a 3 NT second rebid, you probably have a hand that won't disappoint because of having honors in both of partner's bid suits.

3 ♦ also let's opener look for a partial ♥ stopper in your hand with a 3 ♥ rebid. If that happens, you bid 3 ♠ denying the partial stopper and letting opener decide what to do next. But if you hold something like ♥ Jxx, then 3 NT should be bid.

If partner rebids 3 ♠ presumably showing 6-4, you raise to 4 ♠.

If partner rebids 4 ♣ presumably showing at least 5-5, you still bid 4 ♠. Had your hand been Qx xx AJ9xxx Kxx, then raising to 5 ♣ instead of 4 ♠ comes into view.