(n.) A mode of opening the game, in which a pawn is sacrificed to gain an attacking position.

alpha approach art artful dodge artifice assay attempt bag of tricks bid blind bluff bosey breaking-in catch chicanery chouse conspiracy contrivance coup crack craft curve curve-ball cute trick deceit design device dirty deal dirty trick dodge effort endeavor essay expedient experiment fakement fast deal feint fetch ficelle first first blush first glance first impression first inning first lap first move first round first sight first stage first step fling game gimmick go googly grift hocus-pocus initial initiative intrigue jig joker juggle jugglery knavery le premier pas lick little game maneuver move offer opening move pass plan play plot ploy prime primitiveness primitivity racket red herring ruse scheme scurvy trick shift shot sleight sleight of hand sleight-of-hand trick stab step stratagem strategy stroke strong bid subterfuge tactic tentative trial trial and error trick trickery try undertaking warming-up whack whizzer wile wily device