mycroft, on 2013-September-20, 13:27, said:
I usually find that if I'm even close to those cases, the players do understand the Probst Cheat explanation for these.
I was told when I took my TA exam that it was likely I would never run into a Law 23 case. So far, that has been true; there have been a couple of times I've had to investigate it, but never yet applied it. But I'm glad it's there.
I run into potential L23 situations often enough that it remains in the forefront of my mind whenever there is an IB and in a few other common situations. I don't understand the other part, though. Am I wrong to tell the IB'r he is not allowed to subsitute a double ---except when he is making one of those "same or more narrow meaning" doubles which don't bar partner?