Opening

ваканция

vakancija

(vacant position, in an array)

дебют

debjut

(first few moves in a game)

започване

započvane

(act or instance of beginning)

начало

načalo

(act or instance of beginning)

отваряне

otvarjane

(act or instance of making or becoming open)

отвор

otvor

(a gap permitting passage through)

премиера

premiera

(first performance of a show or play by a particular troupe)

увертюра

uvertjura

(first few bars of a musical composition)

удобен случай

udoben slučaj

(opportunity)