There are a lot of suggestions here, and in the spirit of trying to be helpful I will share some of my own thoughts. Some of these were covered later by other posters as well. In approximate order of appearance:
Ranmit, on 2024-November-01, 18:35, said:
Partner's 2♣ bid shows 6+ clubs, ~12-15 HCP, <3 hearts.
There are three style choices here already that I think are worth discussing and evaluating:
- Some unbalanced hands with 5 clubs might be stuck for a rebid. On this auction that is only the 2=2=4=5 and 3=1=4=5 hands too weak for a reverse, and you may decide to open those 1♦ or have some other way to show them. I would open 1♣ and rebid 2♣ with these, but this is generally a controversial topic.
- Your range seems a little off, maybe you are doing some kind of re-evaluation implicitly? It is common for the 3♣ rebid to show 15-17 and for 18+ hands to fake a reverse with 2♦, so that the 6(+)♣ hands that rebid 2♣ are limited to 11-14 ish.
- If you deny a 3c♥ suit always you need a different way to show those, presumably frequent 3-card raises with an unbalanced minimum. Personally I am a fan of this style but others are not.
jillybean, on 2024-November-01, 19:16, said:
3♥ is invitational 6+ hearts
I ran into this style online and internationally, but it is certainly not the only way to play it. To me it depends on your meaning of 1
♣-2
♥ versus 1
♣-1
♥; <rebid>-2
♥. I like to use one of these auctions as weak (approx 4-7) and one as invitational (approx 8- bad 11). With 12 (or a good 11) and a six card major I will force to game. This way I can invite at the 2-level, and leave my jump bids available for something else (in this case: a slam try setting trumps). The main benefit is from stopping at the 2-level with unbal opposite unbal and both having shortage in the other suit. To be honest I don't know why people want to play their invites at the 3-level - statistically it is not attractive at all. Personally I prefer that the direct jump is weak and the slower route is invitational, but it is currently fashionable in the Netherlands to flip this around.
jdiana, on 2024-November-01, 20:45, said:
I agree that 2
♠ is a responder's reverse (I guess I don't have to agree - it is that by definition
) but it doesn't necessarily promise 4 cards. This is a good summary -
https://www.betterbr...ndard200905.pdf Auctions can get a little awkward when the opener rebids their suit, at least for me. 2
♠ is a way to create a GF and explore for the best contract.
Back in the old days, play and defence was excellent but bidding was pretty lousy. One of the consequences was having to fake a lot of reverses or strong jump shifts just to set up a force - all other bids were reserved for weaker hands. This is one such example, and the 1
♣-1M; 2
♦ auction on a single-suited clubs hands I mentioned above is another. Some of these are obsolete, and generally I think this is a part of bidding theory that is slowly disappearing and best not taught anymore. We have better solutions now. They are artificial, but then so is faking a reverse. I will explain a bit more about the options below, both conventional and standard.
mike777, on 2024-November-01, 22:02, said:
I was taught to be conservative with my game invites and be aggressive accepting game invites. I try to be consistent in that approach.
However many play differently and win.
This is one of the more entertaining mistakes that has spread through the bridge community, all the way to the top level. Some even believe that conservative invites can be mathematically shown to be better than light invites. I think this is worth a whole topic of its own though, so I will not go into more detail. But as a general observation, I think the converse approach is superior.
Cyberyeti, on 2024-November-02, 00:58, said:
As Akwoo says, many people play an artificial 2♦ here, some play it GF, some just F1 and opener describes his hand, look up Bourke relays for details of one such scheme, we play a home hashed one where it is only F1.
I prefer to play 2
♦ GF here. It allows both hands to show their shape cheaply without worry of being passed, and we have enough invites anyway. We no longer need to invite in spades, we can invite in hearts with 2
♥, we can invite in clubs with 3
♣, and have 2NT natural invitational as well. The missing case for me is when opener has x=y=4=5 and responder has an invite with hearts and diamonds - and in Walsh style, this could be quite a few diamonds. This is a systemic hit and I do not have a diamond invite here.
However, in the NB forum and not looking for gadgets, I think 2
♦ is merely natural (4+ diamonds) and forcing - especially if 2
♣ denies an x=y=4=5 type hand. You will then rely on the following: with 6(+) hearts you can bid weak, invitational or game forcing as mentioned above. With exactly 5 hearts you can bid your side 4-card spade suit (if game forcing - keep in mind partner has denied 4(+)
♠ already) or diamonds (if invitational+), raise the clubs with at least 3 (or even 2 in a pinch), or bid 2NT when none of these appeal and you want to invite anyway. That only really leaves you stuck on slamgoing hands with strong club support (though you can bid 4
♣) or 5
♥332, and I think that's an acceptable sacrifice in exchange for the lower complexity.
Ranmit, on 2024-November-02, 10:07, said:
But, for completeness, what would the bid be if the majors were reversed?
Keeping with the natural approach, both 2
♦ and 2
♥ show 4(+) cards and are forcing and unlimited. Again this primarily leaves you stuck on the 5
♠332 hand type too strong for 3NT. If you play a gadget that 2
♦ here is an artificial game force it becomes reasonable to play 2
♥ as NF, but even with this gadget the case for it is so-so. If you play reverse flannery your 2
♥ is logically game forcing, though now your single-suited spade invites and slam tries get shifted all over the structure.
Notice that on this start the 2=4=2=5, 1=4=3=5 and even 0=4=4=5 hands may have to rebid 2
♣ with only a five card suit, so the auctions are not quite analogous.
apollo1201, on 2024-November-02, 11:45, said:
As a general rule, one does not try to improve a partial. So over a min response by opener, if responder bids again, it is (game) forcing.
While a popular quote I think it's a misapplication here. A big reason for not attempting to improve the partscore here is that you are very likely to make it worse. Opener has denied three spades and is not a favourite to hold 4 hearts, while a likely 6-card club suit probably plays reasonably well. And opener might well have a 1=2=4=6 or so, in which case we are courting disaster. There are situations where you want to improve the partscore, but here the risks are too great and the target is too narrow. As such, usually no bidding space is assigned to it.
Cyberyeti, on 2024-November-03, 05:05, said:
jillybean, on 2024-November-02, 19:24, said:
I have not heard of 2H being non forcing in any std system.
Yeah, this is part of the theory of putting the better hands through 2
♦ so this can be passed. I would consider 2
♦ artificial reasonably standard above beginner level.
Not quite. Even alongside the 2
♦ 3SGF bid it is reasonable to play 1
♣-1
♠; 2
♣-2
♥ as forcing. All the considerations above still apply - most of the hands that would be in range for 2
♥ NF are better off passing instead.