If Dummy is weak in trumps, and has only one card of a suit in which the dealer has Ace and others, the Ace should be played, and Dummy forced, unless there is a better game.
It is a disadvantage to play in second hand from suits in which each has a guarded honour. If the dealer has Q x x, and Dummy has J x, they must make a trick in that suit if they play a small card second hand, and avoid leading the suit. The same is true of the adversaries; but they must play on the chance that the partner has the honour, whereas the dealer knows it.
Finessing. This is a very important part of the strategy of the game for the dealer. The adversaries of the dealer never finesse in bridge; but the dealer himself relies upon finessing for any extra tricks he may want.
A finesse is any attempt to win a trick with a card which is not the best you hold, nor in sequence with it. Suppose you have Ace and Queen in the hand which is longer in the suit and lead from the shorter hand a small card. If you play the Queen, that is a finesse, because you hope to take a trick with it, although the King is against you.
It is usually bad play to finesse when there are nine cards of the suit between the two hands, dealer’s and Dummy’s, because there is a good chance that the card you wish to finesse against may fall.
When it will be necessary to take two finesses in the same suit, the lead must come twice from the weaker hand. Suppose the dealer holds A Q J and others. If the first finesse of the Jack wins, he should put Dummy in again, so as to take a second finesse of the Queen. Suppose the dealer holds A J 10, and finesses the ten the first time. If it falls to the Queen, he should get Dummy in again, so as to take the second finesse with the Jack. The idea is to take advantage of the fact that the odds are against both King and Queen being in one hand. If they are both on the right, one of them will be played on the small card led from Dummy, and then the dealer can win it with the Ace and force out the other high card with his Jack, which will have become one of the second and third-best of the suit.
Re-entry Cards. After a suit has been cleared, or established, it will be necessary to get into the lead with it. For this purpose the dealer must be careful to preserve a re-entry card in the hand which is longer in the suit. Suppose that Dummy’s long suit is clubs, but that the Ace is against him, and that his only winning card outside is the Ace of diamonds. If diamonds are led, and the dealer has the Queen, he must let the lead come up to his hand so as to keep Dummy’s Ace of diamonds for a re-entry to bring the clubs into play after the Ace has been forced out and the suit established. Many of the prettiest plays in bridge are in the management of re-entry cards.
Underplay. When the dealer is afraid of a suit which is opened against him, and has only one winning card in it, such as the Ace, he should hold up that card until the third hand has no more of the suit to lead to his partner. The original leader will then have to get in himself, because his partner cannot help him; but if the dealer gave up the Ace on the first trick, it would not matter which partner got into the lead, they would return to the suit first opened.
Ducking. This is a method of play by which the dealer hopes to make his own suit even when the hand that is longer in it has no re-entry card. Suppose Dummy holds six clubs to the Ace King, and not another trick in his hand. The dealer has two small clubs only to lead. If the two winning clubs are led right out, it is impossible to catch the Q J 10, no matter how those cards lie, therefore the dealer leads a club, but makes no attempt to win the first round. No matter what is played by the adversaries he ducks the first round, keeping his Ace and King. Next time the dealer gets in, he leads another club, and now he is able to win the second and third rounds of the suit, and will probably catch all the adverse cards and establish it.