beatrix45, on 2014-September-30, 08:26, said:
Just out of curiosity, what would 4♥ show in your world and why?
This is an often misunderstood aspect of cuebidding, a false paradox, perhaps.
Consider the context (ignoring the actual hands, because North bid weird). North's cuebid of 4
♦ bypassed 4
♣ and therefore should have denied a club control. If the purpose of this type of cuebidding is solely to avoid bidding slams off two cashers in one suit (the Ace-King and concede down one), then 4
♦ showed a diamond control but denied a club control.
Now, to Opener. Opener has three relevant holdings and one irrelevant holding. If Opener has no club control either, he has no slam interest and will sign off. As the one irrelevant holding, Opener could have no club control but a heart control. So what? Why show a heart control if you have no club control? So, bidding 4
♥ to announce that subtle nuance would be pointless.
The only two situations where slam is possible, then, are hands with a club control but no heart control, or hands with both clubs and hearts controlled.
There is only one cuebid left -- 4
♥. For Opener to bid 4
♥, as a slam probe, he MUST have a club control. Otherwise, bidding 4
♥ would be stupid. So, the one thing we know for certain is that 4
♥ shows a club control.
Then, the question is whether 4
♥ should also show what you might superficially think -- that Opener has a control in the suit he bids. Seems obvious? Not really. If Opener has control of hearts AND clubs, bidding 4
♥ is somewhat pointless, as he could just bid 4NT to ask for Aces. Technically, 4
♥ could be used as "I have control, but I still doubt due to strength." That is not dumb.
However, this leaves Opener with no good option if he has club control, but no heart control. Sure--he could bid 5
♣. But, this creates a dumb problem, not only for bypassing 4NT but also for forcing the 5-level.
Because of this, the general consensus is that 4
♥ here, which must show a club control by force of logic, only shows that control and, instead of also showing a heart control but doubt, shows a lack of a heart control, which is the doubt. This keeps us below 4
♠ and below 4NT when this usually matters.
A blended option is to have 4
♥ ambiguous about heart control, bidding 4
♥ with either general strength doubt OR heart control problems. This is playable. However, with this blended approach, 4
♥ does not PROMISE a heart control -- it just would not DENY a heart control.
"Gibberish in, gibberish out. A trial judge, three sets of lawyers, and now three appellate judges cannot agree on what this law means. And we ask police officers, prosecutors, defense lawyers, and citizens to enforce or abide by it? The legislature continues to write unreadable statutes. Gibberish should not be enforced as law."
-P.J. Painter.
Fairly basic 2/1 system. 3NT by North over 3S would have been a serious slam try. Assign the blame.
Both players arguments below:
North:- South's 3S shows a mild slam try. Once North bids 4D, South with 2 aces should give a cuebid.
South:- 3S is simply showing a non-descript hand with support. Once North bypasses 3NT, the hand isn't good enough to co-operate.