On this hand from Tuesday's duplicate at a North London Club, SB was quick to take advantage of a slip by a new visitor from abroad, who did not have much English. SB cashed the two top hearts and the ace of clubs (fatally in theory), and switched to a trump won by South who cashed the ace of diamonds, ruffed a diamond, and called for the five of cœur. Dummy's French and observational skills were enough to play the five of hearts, the only five in dummy, and South ruffed that, ruffed another diamond and called "seven". Dummy continued on the same vein with the seven of hearts, but SB pounced. "That was an incomplete designation," he stated. "Dummy therefore has to lead the seven of spades, continuing the suit "in which" he won the last trick". "The law here is not that clear, but gordontd has stated it means the suit dummy ruffed the previous trick with. His different intention was not incontrovertible, as it would not be ridiculous to draw the last trump, miscounting one's tricks. I think it is one off now, is it not?" he gloated.
"DIRECTOOOOOOOOOOOOOOOOR", he bellowed. The TD came running. "There was a breach of 46A by declarer". He continued: "There was also a breach of Law 46A (qv Law 1) two tricks ago, when declarer used "cœur" instead of "hearts", but as you know I am a reasonable chap and I let that go."
How do you rule?