Jinksy, on 2014-August-31, 14:33, said:
Given that I'm asking this, you can probably guess that the Q♦ was offside and stiff. Is there any reason I should have played for N's shortage to be the stiff Q?
No, not in a good game.
In fact
♦A lead beats you outright and that would have been more attractive from Axx than AQx
Psychology wise,an intermediate opponent, however, will often put up the ace in this position when the jack is led holding AQx, even though declarer is an open book. (North is unlikely to hold the diamond ace in addition to his other goodies and pass over 5
♥)
So there would be more reason to put up the king in a weak game.
Rainer Herrmann