Sentence:  "The <WSD>Finesse</WSD> Proper."—When, upon the invite of your partner, you refuse to force with your strongest card, or one of equal strength, you are in the case of the <WSD>finesse</WSD> proper. Holding the ace, queen, and ten, and taking with the queen, is a simple <WSD>finesse</WSD>; that is, a <WSD>finesse</WSD> to the king. 
Meaning of the word marked with <WSD> tags:  In bridge, whist, etc.: a technique which allows one to win a trick, usually by playing a card when it is thought that a card that can beat it is held by another player whose turn is over. (from early 18th c.)