Each of these two plays is "nonstandard" ... but if East is aware of the
     problems faced by declarer and by his partner, he will know to make nonstandard
     plays at Tricks 1 and 2.
    
    "Standard" play for East would be to win with his cheaper honor, the king,
    at Trick 1. However, if South holds the QTx (as, alas, is the case), then
    winning with the king will make it more likely that South will find the winning
    play of the queen, rather than the losing play of the ten, at Trick 2.
    (East's play of the ace suggests to declarer that West owns the king; therefore
    it would appear to declarer that his only chance to win a diamond trick is to play
    East for the jack.) Hence, this time it is best for East to win with the higher
    honor, the ace.
    
    "Standard" play for East at Trick 2 would be to return the five, original fourth best.
    However, if East returns the five and West owns J7432(as, indeed, West does) -- and
    South misguesses by playing the ten losing to West's jack --, East will be left with K8
    when West owns 742 and the suit will be blocked.  Hence, this time it is best for East
    to return the eight so that he is left with K5 and not the blocking K8.
    
    Ah, that is what makes bridge so fascinating.  You not only have to learn to make the
    standard plays, but you also have to learn when not to make them!

-- submitted by Jeff Lehman on November 5, 2007