deftist, on 2015-December-20, 20:40, said:
Thanks for your replies, all.
I have a question about bidding clubs. What's the difference between rebidding 2♣ and 3♣ here? Do I understand it that I am forcing when I jump to 3♣ but not when rebidding just 2♣? Or is he not allowed to pass 2♣ either?
And if I am indeed interested in clubs (which I am not in this hand), what should I rebid over his 1NT?
1. Don't rebid 2
♣ without an agreement with partner to be playing checkback stayman or new minor forcing or something else artificial and forcing. This is non-standard, it is not part of "SAYC" by default, for example. But nearly all decent players will do something artificial here, often both 2
♣ and 2
♦ are used as artificial. But it needs discussion.
2. With zero agreements, 2
♣ is natural, weak, non-forcing. 3
♣ is then presumably natural and forcing. But hardly anyone beyond beginner stage plays this anymore.
3. Meaning of a direct 3
♣ depends on the entire structure, what 2
♣ means, what 2
♦ means, other stuff. Common possible meanings of 3clubs include:
- forcing, 5-5+ hearts/clubs
- non-forcing, invitational, 5-5+ hearts/clubs
- non-forcing, weak, to play, 4 hearts, 6+ clubs
Normally one makes an agreement and makes the direct 3
♣ bid mean one of these, and bidding 2
♣ followed by 3
♣ mean something else, one way being forcing and the other way being non-forcing. Players playing "XYZ" or something similar even have a third method to get to clubs, bidding 1
♦-1
♥-1nt-2nt!, the 2nt being an artificial puppet to 3
♣. If you play 2
♦ as GF as in 2-way checkback or XYZ, you have yet another way to bid clubs, 2
♦ followed by 3
♣, which can pick up yet another meaning.