Contract bridge card play

In contract bridge and similar games, a finesse is a type of card play technique which will enable a player to win an additional trick or tricks should there be a favorable position of one or more cards in the hands of the opponents.

An endplay (also throw-in), in bridge and similar games, is a tactical play where a defender is put on lead at a strategic moment, and then has to make a play that loses one or more tricks. Most commonly the losing play either constitutes a free finesse, or else it gives declarer a ruff and discard. In a case where declarer has no entries to dummy (or to his own hand), the defender may also be endplayed into leading a suit which can be won in that hand.

states that play of a particular card decreases the probability its player holds any equivalent card