TRICK 2.--The dealer’s best play is undoubtedly to establish the club
suit. A has little reason to pass this trick; taking the king with
the ace may establish the jack in B’s hand.
TRICK 3.--Players will so often play for their own suit, with little
or no regard for their partner’s hand. If the high cards in your suit
are against you, and your card of entry has been taken out, abandon
the suit and endeavour to help your partner. A infers that his
partner’s suit is diamonds and leads the supporting jack through the
king.