Posted 2022-September-19, 16:34
If we’re discussing robot bidding, which means we’re discussing the intricacies and (often woeful) failings of the GIB algorithm, I have zero interest. The more one bids well with GIB, then the less likely one is to bid well playing actual bridge, unless you’re a savant who can do both, and not let one game influence how you play the other
If discussing how one should handle this with a good human partner, playing bridge with an ability to draw inferences rather than add up ‘total points’ (whatever that means to GIB) and make a literally robotic, non-thinking call, then this is a discussion worth having.
But I think it’s virtually insoluble without knowing what inferences one can draw from 1S.
Contrary to what Gilithin says, I don’t think it’s at all standard to bypass 1S with all balanced hands. I do, in my partnerships, but I know some pretty good players who do not.
I don’t know the current Bridge World Standard approach. When I last subscribed, one bypassed spades only with 4=3=3=3. With 4=2=3=4 or 4=3=2=4 one bid 1S and, even if that’s no longer BWS, I suspect some strong players still do that.
If 1S promises an unbalanced hand (for us 4=5 or wilder in the blacks) the hand still isn’t simple
1C 1H 1S 2D 2H….
What does partner bid with, say, KJxx Jx xx AQJxx?
In one partnership we use the cheapest step over 4SF as a noise, simply denying the ability to do anything else. We might even have 4=1=3=5 shape with xxx in diamonds…we’d fudge 2N with as little as Jxx. Have you had this discussion about 2H with your favourite partner? If not, what is your rebid with 4=2=2=5, xx in diamonds?
Say I have KJxx Kx xx AJxxx. I would bid 2H in any expert partnership and I think that would get a lot of support in expert circles.
With say KJxx x Qxx AJxxx (make it AQxxx if you wouldn’t open that 11 count) then 2N
So after 2H, I agree with 2N, and I also agree with 3H by opener….if he has 4=3=1=5 shape.
On that auction, this 20 count isn’t as strong as it looks…it’s rarely good to hold xxx in partner’s main suit and AKJ in his stiff suit. Compare to AQx AQxx xxx AKJ
I don’t even think this is a slam force opposite a sound opening bid. In my partnerships we open almost all 11 counts so my partner could easily hold KJxx Jxx x AQxxx
Thus if we did have 2C 1H 1S 2D 2H 2N 3H I think all we can do is 4N. Kxxx Kxx x AQJxx is a borderline accept in my partnerships….we have a queen more than we’ve promised and that club Jack is a good card. Give me AQJ10x and the major kings and it’s clearly right to bid.
I should qualify that 4N choice. It probably isn’t available to most players who would automatically think that 4N was keycard. We play kickback, so we use 4S as keycard. Here, 4N is a quantitative slam invitation.
If you don’t have that,then you’re pretty much stuck.
However, even if 4N is invitational, style (as almost always) matters. Our general philosophy on game and slam invites is to invite heavy and accept light. The logic behind that for game bidding is overwhelming. The same mathematical reasoning doesn’t apply to slam bidding quite as strongly, but it’s still there….on a really bad day, when you stretch, for example, to bid an invitational 4N, and partner rejects, you might find 9 tricks is the limit. 4N down one is an awful score no matter imps, mps, or rubber
Thus I can bid 4N with perhaps more comfort than those who need partner to have a reason to accept…we accept unless we have a reason to pass. We don’t need much more than we’ve shown.
If opener needs, say, a king more than a reasonable minimum in order to accept, I think you just have to bid 6N. As little as Kxxx Jxx Q KJxxx, and he has more than that, gives one a (minuscule) play for slam. And, since he’ll pass often when slam is good (playing a style where he needs ‘extras’ to accept) you’ll miss too many decent slams by inviting
Also, if this is matchpoints and you’re in some normal field, rather than the last day of a Blue Ribbon Pairs, you ‘know’ that almost everyone whose partner opened is in 6N.
And if you are stuck over 3H, then I’d just blast 6N. There’s a reason virtually all expert partnerships have very detailed agreements and use lots of low-frequency artificialities. When the right hands arise, those agreements make ‘judgement’ less challenging.
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