Definitions:
impressive delicacy and skill

(in bridge and whist) an attempt to win a trick with a card that is not a certain winner, typically by playing it as the third card in a trick in the hope that any card that could beat it is in the hand of the opponent who has already played.

bring about or deal with (something) by using great delicacy and skill

(in bridge and whist) play (a card) in the hope of winning a trick with it because any card that could beat it is in the hand of the opponent who has already played.