are counter punchers; they react to the opponent’s action.
Of course there are times when you have to come out swinging and be aggressive. It is the expert player who knows when. Most of the bad Defenders are bad because they are too busy: changing suits; winning
tricks; and playing Aces. Remember Aces take Kings or Queens; if led the Ace will capture air.
Most Defense is Passive; do not lead a suit that has not been led; do not play a card that might give the Declarer a trick; and do let the Declarer win what he is entitled to win. Do nothing desperate. Wait, the winners will come to you. You do not have to win; just let the Declarer lose. Again the expert Defender knows when to panic; when to be Active. He knows when to cash out; take winners; lead high cards; and when to take chances. He knows when not to give up the lead but to win quickly. When it is time to be Active, ACT! When it is time to be Passive, REACT!