Posted 2025-February-08, 16:26
Oh it's more confusing than that.
They think "oh, just make it sufficient" is both an option and an order. The IBer also knows that "I'll just make it sufficient". With no worries about the other call, whether the bid should be 4♠ instead of 4♥ (even though the IB was 2♥), or... They all get very upset if anyone suggests that isn't right, or maybe we should have the director help with it, because "we all know".
I start with the 25A dance. Assuming they didn't pull the wrong card, "if it is to your advantage, you can accept this call and make any legal call 1♠ or higher, pass or double. If not, we will go back here and we'll give him his options."
Obviously, if LHO wants to know what the options are, I'll tell them (in broad terms). But those that are in the "you just do this to be confusing" camp don't care.
If not accepted, then I'll usually take them away to find out what auction they thought they were bidding, and what calls they can make that are "lowest showing same denomination" or "comparable." Then I'll come back and explain what calls will let the auction continue normally and which will bar partner.
Then they can make the call, and we go from there.
You are correct that partner can not assist in the choice to accept (10C2).
Now, even more confusing (but only for you, not the players): the withdrawn call is UI (16C2), but the fact that they might have had to fudge their call to avoid partner passing *is not*. Law 16 does not apply (27B1a) (or b, but "comparable call" is such that there shouldn't *be* any UI). Instead, you get 27D, which boils down to "if they got to a contract they couldn't have got to without the IB...the director should award what would have happened had the IB not occured". Note that is very different from the "carefully avoid" and "Logical Alternative" benchmark of Law 16.
Please note: I have never, in 7 (17, in IB cases) years, adjusted a score via 27D (or its equivalent in 23C). In November I had a hand where I thought about it more than "no, it's okay". This Just Doesn't Happen. But telling them there is more UI than there is will cause them to self-select calls that are not the legal best for their side.
In this specific auction, note that double (if it's negative, promising hearts) is considered comparable and allowed despite 27B3 (see the exception). If they play negative free bids, however, where it's hearts or a strong hand, then it's not.
Confused yet?
When I go to sea, don't fear for me, Fear For The Storm -- Birdie and the Swansong (tSCoSI)