Clear your long suit before you take out your card of re-entry is a simple rule that is often violated. When you have made the “no-trump” declaration, any possible re-entry in the dummy hand should be used to bring in a suit or to lead a suit advantageously from the weak hand. In fact, much of the success of a “no-trump” hand depends on the dealers’ skill in saving and making re-entries in the weaker hand.
A re-entry may be an ace or a three. It may be the master card of your long suit or a guarded honour in the adversaries’ suit.
When you can win the original lead in either hand, consider well the question of re-entries before you touch one of dummy’s cards.
Save all possible re-entry cards, remembering that often in order to gain any material advantage from a finesse you must be in a position to lead twice from the weak hand.
For instance, holding any one of the following combinations:
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