If a suit is led and the card played by the younger hand is not higher than the ten, do not win the first trick with the Ace holding Ace, King, Queen. The elder hand cannot have King, Queen, Jack, and taking the first trick with the Ace would clearly show the situation.
If you hold a singleton King lead the suit from dummy at the first opportunity, being careful to select as a card to lead a ten or a nine. This gives the impression that you intend to finesse. You may tempt the adversary, with the Ace second in hand, to pass the trick, whereas were a small card led he would probably make no such mistake.
If you hold a small card as a singleton with King and Jack, or King and others in dummy, do not wait until your adversary can count your hand, but lead your singleton early in the hand and do not finesse.
If you want high cards to fall, lead high cards. It is astounding how difficult one finds it not to cover an honor led. With this in mind, with a singleton Ace in your hand, and a sequence in dummy from the Queen to the nine, the adversaries will make no mistake if a low card is led, while the Queen is a temptress that few can resist.
If you hold ten cards of suit in your hand and that of the dummy with the Ace and King both against you, no doubt you will lose two tricks in the suit; but when you do lead it lead your highest card. You may tempt your second hand adversary to cover and the other honor may fall.
If you have nine or more cards in your hand and that of the dummy headed by Ace and King, it is usually unwise to finesse; but it is always good play to lead the Jack towards the high card in the opposite hand as it may tempt your adversary to cover.
If the adversary, after seeing dummy, lead through a King Jack suit he probably has no high cards in the suit. To play the King can do but little harm, and, if he has the Ace, you may shut it out.
If you have Queen, ten and one small in dummy, and Ace, nine, small in your own hand, lead the small card. If the King is not put up second in hand, play the ten; if the Jack wins the trick the King is probably in the same player’s hand, and you must get the lead in dummy to come through this hand. Without the ten in either hand pass the first trick and make no effort to win with your Queen. This may be your only hope to get two tricks in the suit.
If you have the Ace, King, small in your hand and Jack and two small in dummy, the discard may show that your left hand adversary holds the Queen protected. To steal a trick here, you must play the Ace and underplay with the hope that this player will mark the King in his partner’s hand and not play high.
If at “No Trump” a high card is led against you originally, and you have length in that suit, hold up the lowest card to make the adversary think his partner is unblocking.