The discard offers fewer difficulties to the dealer whose two hands
reveal the suit that should be protected, and show the cards that can
be conveniently spared.
In a “no-trump” hand it is especially necessary to guard all weak
suits; not forgetting that a four-card suit to the ten will often
block the opponent’s lead.
The second suit that they will open is often shown by the adversary’s
discards; and this, too, will aid you to prepare a proper defence.
When you hold trump strength discard losing cards from one hand on
winning ones in the other.
At times it may be necessary to discard high cards to unblock a suit
and to protect honours in another suit.
In discarding endeavour to conceal both your weakness and your
strength; you may often mislead your opponents and tempt them to lead
to your strong suit.