Noun
a recognized sequence of moves at the beginning of a game of chess
Source: WordNethe memorized all the important chess openings Source: Internet
The Latvian Gambit or Greco Counter Gambit is a chess opening characterised by the moves: :1. Source: Internet
Evans (1958), pp. 22–67 Phases Opening main A chess opening is the group of initial moves of a game (the "opening moves"). Source: Internet
Opening main A chess opening is the group of initial moves of a game (the "opening moves"). Source: Internet