AL78, on 2020-March-13, 18:17, said:
My friend led a low diamond (ugh, I've told her before not to underlead aces). The full deal:
2
♠ ended up just making. If she finds the
♦A lead, it goes (at best) ace, ruff, low club, ruff, club, ruff, heart, and South eventually makes their king, two down. Nobody defending a spade contract found that defence, so all declarers in 2 or 3
♠ made eight tricks. One North managed to make 3NT, goodness knows how, or even how they got there.
I suspect I would be with my Canadian attorney counterpart and lead a low heart (another losing lead for me). A trump, a low heart, or the Ad could be right. Much of it depends on how many diamonds dummy has. If dummy has 0-1 D (something like 2515), then a trump is probably best. If dummy has two diamonds (say 2425), then it's probably right to start a heart and rely on partner to provide a surprise overruff on the third round of diamonds. If dummy has three diamonds, then the Ad lead could strike gold.
And no -- no one defending 2S will find the defense you suggest -- no one at all. Come on. Ad, low d (asking for a club). At MP, after your X, what North in his right mind is going to lead a small club and hope you have the AT, rather than leading the Q?