pran, on 2019-December-01, 09:29, said:
It must have been more recent than 1980 and it might quite possibly have been only a minute or a suggestion within the law committee, never making it's way to the laws.
The story was that Kaplan had been so confused over an unexpected answer to his Blackwood 4NT that he passed instead of correcting to the agreed trump denomination.
The rule I remember was that the offending player was (or should be) allowed to change his call to the obviously intended call, but his side could then not score better than 40% on that board. (The non-offending side would receive the table result.)
you are recollecting 1997WBF25B. I suppose that I was the very first in America to suffer at the hands of this abomination in a tournament- May 30, 1997