peachy, on Jan 11 2010, 10:19 AM, said:
blackshoe, on Jan 10 2010, 12:01 PM, said:
Apparently this pair have agreed to play transfers in an uncontested auction, but have not discussed whether transfers are still on when 1NT is doubled.
Never mind alerts for the moment. If 4th seat asks what 2
♦ means, what is opener to say? That it's a transfer? That it's natural? Neither of those is certainly the case, so no. It's "undiscussed"? No, because they do have an agreement in a similar, but uncontested auction. So the correct explanation is "undiscussed, but we play transfers in uncontested auctions".
Because there is ambiguity in the meaning of 2
♦ (opener does not know for certain whether responder intends it as natural or as a transfer), I would invoke the basic principle on alerting stated in OB 5B1
Quote
The purpose of alerting and announcing is to draw the opponents attention to any call by partner that may have a special meaning.
2
♦ in this sequence may have a special meaning it may be a transfer. Therefore, it should be alerted, and the explanation above given. Therefore the failure to alert is UI,
because responder can infer that opener thinks the agreement to transfer is definitely off in this case. It's also MI, because Law 20F5{a} says it is.
If opponent asks about the 2D call, I agree the proper answer is as you suggested. But if failure to alert is UI and MI, then alerting is also UI and MI. Alert and "I am assuming this could be a transfer" or not alert and "I am assuming this could be natural". I understand that opponents getting full disclosure of the
AGREEMENTS trumps everything else so from that perspective I understand alerting EVEN IF OPENER WAS NEVER GOING TO ACT AS IF THE CALL WAS TRANSFER (and he wouldn't, he would always Pass). I think alert would be causing damage if responder had diamonds and opponents do not ask. Not alerting cannot possibly cause damage to the opponents because a) responder will bid 2H (if he had hearts) or b ) opponents never double so they get to profitably defend a silly 2D contract. I also understand that we must follow whatever the regulation says but if the regulation INDEED says the 2D in the posted case requires alert, then it is a bad regulation that promotes damage to the NOS......
Of course both alerts and missing alerts are UI.
An expected alert (or missing alert when no alert is expected) gives the unauthorized information that the call was (probably) correct understood, but this information does not demonstrably suggest any action other than to continue a normal auction.
An unexpected alert gives the unauthorized information that a misunderstanding exists in the partnership.
A missing alert when alert was expected either gives the same unauthorized information, or it gives the less serious unathorized information that partner simply forgot to alert.
In either case this unauthorized information can very well demonstrably suggest actions which the affected player is now prohibited from selecting unless he has no other alternative action available. He must continue his auction ignoring all inferences he can draw from the fact that partner alerted unexpectedly or did not alert when expected.
Here the missing alert gave opponents the misinformation that responder had diamonds for his 2
♦ bid, and responder the unauthorized information that opener did not hold a "Diamonds heavy" 1NT opening bid.
In the actual case opponents doubled because they knew that this would be needed for a reasonable score when 2
♦ was natural. Had they known that 2
♦ was transfer (information to which they were entitled) they could see that the double was most likely superfluous. (They already "knew" that their side held the majority of cards and that a 2
♦ contract would go down)