szgyula, on 2014-September-02, 08:08, said:
This leads to a more general issue I do not know how to handle: You start using a new convention, e.g. 1H-3C is Ghestem per agreement. You know your partner tends to forget new conventions a few times.
1. What is the correct explanation in general? I would say that "frequent bidding error" is something like an implicit agreement and you I must disclose it. Thus, I would say that "by agreement this is Ghestem but this is a new convention and my partner may have made an error, in which case it is a long club". It is important that the second part is always there, no matter what I think, based on my hand -- otherwise it is UI.
While I agree with the form of your explanation, I think your partner has UI willy-nilly. When he bid a natural 3
♣ (as a WJO, I'm guessing) he did not expect an alert. He got one anyway. This conveys the UI that he has forgotten the agreement.
szgyula, on 2014-September-02, 08:08, said:
2. If you strongly suspect that your partner indeed made a mistake (e.g. no clubs, lots of reds in your hand), are you allowed to act on the assumption that the bid actually shows clubs? I would guess yes, since this decision is not based on any UI. Of course if you guess wrong, you can not complain. Lets assume that a bid like "long club OR Ghestem is not against the systems regulation".
As long as you have properly disclosed your agreement, and partner has not reacted in any way, you can bid what you like. But if partner frowned, grimaced, said "oh *****", or reacted in any way, you have UI, and are constrained by it.
szgyula, on 2014-September-02, 08:08, said:
3. Lets turn this around: 1H-3C-P-3S-P. At this point you realize that your 3C was a bidding error. Can you bid C again to show that you made a mistake? I would say yes, since there is no UI, either.
If there was no alert, you can bid clubs again. If there was an alert, you have UI (see my response to #1 above) and are constrained by it. You have to act as if whatever partner bid was in response to a natural (weak?) jump overcall.
szgyula, on 2014-September-02, 08:08, said:
4. Now we are at 1H-3C-P-3S-P-4C. Can you wake up at this point and pass (or raise to 5C)? Again, there is no UI. Why not?
Again, if there was an alert, there
is UI.
szgyula, on 2014-September-02, 08:08, said:
A version of this happened yesterday: 1C-2D (Ghestem, alerted, explained)-P-2H (I prefer H)-P-2S-P-2N. My partner made a mistake, he wanted to bid 1D natural, not 2D. I had 2533 with good controls in the minors. After the 2D I smelled trouble but could not be sure so I alerted and explained the agreement (55 in majors). I showed preference for H (after all I had 5). After the 2S bid I was even more confused but having good minors, I elected to bid 2N, which seemed to be a good contract against both a Ghestem and a long D suit. Was this legal? My partner
truly made a bidding error. I explaned all the bids per system and I based everthing on AI. After the auction ended and I became declarer, I explicitly asked my partner to correct any mistaken explanation I gave. He stated that my explanation was correct, the 2D bid is indeed Ghestem in our system and it means what I explained. He also explained that he wanted to bid 1D only. I think that he had no obligation to explain the error but doing so was not illegal as I became declarer and the auction was over. All this without screens.
If your partner intended to bid 1
♦, and 2
♦ was a "mis-pull", then when you alert 2
♦, he is entitled to
immediately (attempt to) change his bid (Law 25A). Once you have called, he cannot. So if the alert wakes him up, he can change it. If he doesn't wake up until you bid 2
♥, he can't. That's for the future, since in this case he
didn't try to change 2
♦. Now he has UI. The UI is that you prefer hearts to spades, but you think he's 5-5 in those suits, so you may not have much in either suit. If he really did have a Ghestem hand, what would 2
♠ show? I don't know Ghestem, but I would guess "not weak, possibly longer spades". In that case I see nothing wrong with 2NT, but I think a player poll would be appropriate here.
There is no obligation to say that one has misbid, nor is there any prohibition against it. Note that if your side had ended up defending, it would be inappropriate (and illegal!) for your partner to offer any corrections to your alerts and explanations during the clarification period. He must wait until the play is over. So you must not, in such a case, suggest to him, during the clarification period, that he should offer such corrections.
szgyula, on 2014-September-02, 08:08, said:
Yet another issue: If anything happens too often, it becomes an implicit agreement. What happens if this implicit agreement would be an forbidden agreement per systems policy in the event?
Then if there is a regulation in place dealing with such agreements, the TD follows that regulation (I believe this is the case in the EBU, for one). If there is no regulation in place, the director applies Law 40B5, which instructs him to adjust the score, and allows him to award a procedural penalty.
In general, when your pair are trying a new agreement, it may be worth pre-alerting that fact, including, as appropriate, any known tendency by either partner to forget. This is not a requirement in law, or in regulation so far as I know, but it seems in the spirt of "full disclosure". That does not, IMO, absolve you of the requirement to fully disclose what you know when such a situation arises during the course of a hand.
One last thought: when you are trying a new agreement, unless you have very strong (and authorized) evidence that partner has forgotten it, I think you should bid as if he did not forget. This should be done, IMO, in the interest of partnership harmony — consider how partner will feel if you assume he forgot, but he didn't.